Measuring Dental Implant Safety and Performance

Size: px
Start display at page:

Download "Measuring Dental Implant Safety and Performance"

Transcription

1 ISSN Russian Journal of Biomechanics Vol. 19, No. 3: MOBILITY OF DENTAL IMPLANTS: NEW CAPABILITY OF A KNOWN DEVICE V.A. Eroshin 1, M.V. Dzhalalova 1, A.V. Boyko 1, S.D. Arutyunov, A.G. Stepanov, A.N. Daov 1 Institute of Mechanics of Lomonosov Moscow State University, 1 Michurinsky Prospekt, Moscow, Russia, margarita-vd@mail.ru Moscow Evdokimov State Medical Stomatologic University, 0/1 Delegatskaya St., 17473, Moscow, stepanovmd@list.ru Abstract. We used classical screw-type dental implants from the Conmet company (Russia) and miniimplants from the 3М ESPE company (USA) fixed in osseous tissue analogs of polyurethane and linden, having different geometric parameters. Devices Periotest (Medizintechnik Gulden, Germany) and Osstell Mentor (Sweden) are used to monitor the stability of dental implants since its installation, the level of osseointegration and functional determinetion of allowable loads, especially in the initial period of their use as an artificial supports for dental and mandibular prostheses. Due to permanent technical development, the last versions of these devices (Periotest M and Osstell ISQ) have been considerably improved while there were some weak points in previous versions. We must stress that both devices give results of strength measurement for dental implants fastening in osseous tissue in some standard units which have no physical sense, therefore guidelines on the basis of only these measurements are not sufficiently proved and convincing. In this work, the last version of Periotest M was examined and parameters measured by this device were interpreted as coefficients of damping. Methods for measuring these factors through the special device for determining the mobility of the teeth or implants were proposed to achieve higher accuracy. Distribution of vertical displacement of dental implants obtained in numerical simulations by finite element method using a virtual model of a full-scale test bench is consistent with the physical experiment. A simple linear relationship between damping ratio and compliance based on the results obtained by the laser test and numerical experiment, allowing for the dental implant fixed in the bone analogue, based on readings of Periotest M to determine the value of its movement, depending on the longitudinal and transverse loads. Key words: orthopedic dentistry, dental implant, mini dental implant, coefficients of damping, compliance coefficients. INTRODUCTION Orthopedic dental rehabilitation of patients with the use of dental implants has established in daily ambulatory practice of dentists. Appearance of mini dental implants and, in particular, a low invasive protocol for their installation has considerably enlarged a number of dental implants use supporters among both dentists and their patients. But for such operations to be successful, dental implants stability should be monitored from the moment of installation and Eroshin V.A., Dzhalalova M.V., Boyko A.V., Arutyunov S.D., Stepanov A.G., Daov A.N., 015 Vladimir A. Eroshin, Ph.D., Professor, Leading Research Scientist, Institute of Mechanics, Moscow Margarita V. Dzhalalova, Ph.D., Senior Research Scientist, Institute of Mechanics, Moscow Sergei D. Arutyunov, Ph.D., Professor, Chair of Clinical Dentistry, Moscow Alexander G. Stepanov, Ph.D., Assistant Professor of Clinical Dentistry, Moscow Azamat N. Daov, Assistant of Clinical Dentistry, Moscow

2 Mobility of implants: new capability of a known device allowable functional (masticatory) load should be adjusted especially on the initial stage of their use as artificial supports for dental and maxillary prostheses. Currently, Periotest (Medizintechnik Gulden, Germany) and Osstell Mentor (Sweden) devices are most widely used for this purpose. Due to permanent technical development, the last versions of these devices (Periotest M and Osstell ISQ) have been considerably improved while there were some weak points in previous versions []. We must stress that both devices give results of strength measurement for dental implants fastening in osseous tissue in some standard units which have no physical sense, therefore guidelines on the basis of only these measurements are not sufficiently proved and convincing. What about the Osstell ISQ device, recent researches enable to considerably enlarge its capability and to establish connection between coefficients of implant stability and coefficients of fastening rigidity of dental implants in osseous tissue measured according to the technique of laser testing [1, 3]. All it enables to describe relationship between masticatory load on implants and their corresponding moving. In this work, the last version of Periotest M was examined and parameters measured by this device were interpreted as coefficients of damping. The ratio was established between them and compliance coefficients determined by results of a laser testing and a numerical experiment. MATERIALS, DEVICES, AND MEASUREMENT METHODS During research, we used classical screw-type dental implants from the Conmet company (Russia) and miniimplants from the 3М ESPE company (USA) (Fig. 1) fixed in osseous tissue analogs of polyurethane and linden. To measure coefficients of damping for dental implants fixed in osseous tissue analogs, a Periotest M device of the Medizintechnik Gulden company (Germany) was used. Compliance of implant fastening was determined using an installation by coefficient of rigidity measurement []. Data of implant dimensions and mass are given in Table 1, where l is length of implants (in brackets, length of thread), d is the greatest diameter, m is mass. In 1985, W. Shulte offered a method of periotestometry for estimation of periodontium conditions of natural teeth [4, 5], and only later on it began to be used for estimation of dental implant fastening strength. The measurement technique is based on correlation between density of osseous tissue around of dental implants and its ability to damp impact load [4, 5]. Parameters of various implants No. l, mm d, mm m, g 1 11 (8) (10) (1) (1) (16) (9) (9) (10) (15) (15) Table 1 ISSN Russian Journal of Biomechanics Vol. 19, No. 3:

3 V.A. Eroshin, M.V. Dzhalalova, A.V. Boyko, S.D. Arutyunov, A.G. Stepanov, A.N. Daov Fig. 1. Shapes of Conmet (Russia) dental implants (1-5) and 3M ESPE (USA) mini implants (6-10) Aim pulse actuated at impact (Fig. ) passes through a dental implants and is passed to a osseous tissue. A waveform of the echo signal and its duration depend on elasticity of osseous tissue; microprocessors analyze them and the display screen shows an integrated digital value of osseous tissue damping ability. Recommendations for users of Periotest are presented in Table. Let us note that along with coefficients of damping at a transverse impact (see Fig. ), the Periotest device also enables to determine coefficients of damping at a longitudinal impact when dental implants are loaded along symmetry axis. Further, it will be demonstrated that both coefficients conform well with appropriate compliance coefficients determined numerically and according to the technique of laser testing. For the first time, comparison of coefficients of damping and coefficients of rigidity was performed in work [] where satisfactory qualitative conformity of these results was specified. However, it was difficult to judge quantitative conformity while fastening strength of a dental implant in osseous tissue increases, coefficients of rigidity also increase, but coefficients of damping decrease and even become negative (see Table ). 1 Fig.. Measurement of coefficient of damping (1) and the echo signal waveform () 38 ISSN Russian Journal of Biomechanics Vol. 19, No. 3: 36-43

4 Mobility of implants: new capability of a known device Recommendations for users of Periotest Table Periotest value range Interpretation Good osseointegration; the implant is well integrated and can be loaded Clinical examination is required; in most cases implant loading is not (yet) possible Osseointegration is insufficient; the implant must not be loaded So then, to obtain a clearer image, compliance coefficients П were introduced instead of dental implants coefficients of rigidity as a ratio of dental implants load point displacement to an applied force magnitude: П = /F, where (micron) is of a dental implants load point, F is force magnitude. Fig. 3 presents the displacement measuring schema at implant transverse load. Here, 1 is mini dental implants; is osseous tissue analog; pin 3 supported on an mini dental implants head is rigidly connected with lever 4 rotating on an axis passing through point O; pin 3 is loaded by force F, and the impact point of laser 5 fixed on lever execntes movement ξ on screen 6; 7 is a gum shield with apertures; 8, 9 are elements of osseous tissue analog fastening. The value of lever OA angle of rotation φ and vertical movement of an implant head are determined according to formulas: φ = ξ/l, = φ OA, where L is distance from lever rotation center O to the screen (ξ << L). As it has been already noted, a scatter of measurement results was large enough when previous versions of Periotest were used. This imperfection has been substantially overcome in the last version of the device due to modifications in software. Nevertheless, in some cases more accurate measurements are required because of a series of research technique disadvantages. First of all, a human factor matters: it is impossible to avoid physiological tremor of researcher's hands and to control exactness of the sensor place of impact; the distance between the sensor and the tooth vestibular surface (or the dental implants abutment center) should make mm and the sensor axis should be directed completely perpendicularly to the tooth surface. 5 F O A Fig. 3. Scheme of displacement measure at transverse load ISSN Russian Journal of Biomechanics Vol. 19, No. 3:

5 V.A. Eroshin, M.V. Dzhalalova, A.V. Boyko, S.D. Arutyunov, A.G. Stepanov, A.N. Daov To achieve this goal, a technique was offered for coefficient of damping measurement with a special unit for determination of tooth or implant mobility (Patent Decision of the Russian Federation under application No of 06/04/14). This unit is a transparent a gum shield which shape corresponds to specific features of anatomy of patient's established implants and alveolar jaws. Such shield is made of 4 mm thick rigid plastic by a method of vacuum thermopressing. There is a perimeter gap of mm between the shield surface and examined teeth and cones through holes are formed in the shield in projection of the center of clinical equator of the examined teeth vestibular surface; conicity of the holes conforms to conicity of the measuring sensor nozzle. Experiments have shown that, in the course of monitoring of dental implants mobility through holes in a shield, the device tip impacts uniformly to the same point and at a required angle to an implant, i.e. this technique really reduces a scatter of measurement results and works quite effectively. COMPARISON OF DAMPING AND COMPLIANCE COEFFICIENTS A number of series of experiments with the use of dental implants (Fig. 1) fixed in various osseous tissue analogs were carried out to compare coefficients of damping P measured by Periotest M and compliance coefficients П determined by the technique of laser testing. Experimental data are shown in Table 3 and in Fig. 4 where coefficients of damping are on the horizontal axis and compliance coefficients are on the vertical one. First, let us consider relationship between P and П at transverse load (lines I-III in Table 3). We see that the relationship between these coefficients is close to linear in the range ( 8 < P < 9), i.e. when there is a good osteointegration and when an additional clinical examination is required. It tells of expedience to introduce a new value of coefficient of damping according to the formula: P n = P с +10, (where n means new value and c means old value). In this case, we obtain the following relationship between compliance and damping coefficients: П = 0.57 P n. So, the new coefficient of damping will immediately give an idea of dental implants fastening strength in the most important range of measurement. Moreover, since П = /F, then after introduction of the new coefficient of damping, we can estimate, using Periotest M, the value of displacement of implant's point under the action of an applied force: = П F = 0.57 P n F. Table 3 Values of damping and compliance coefficients of dental implants fixed in various osseous tissue analogs (No. is a dental implant) No. Coefficients I P П, μm/n II P П, μm/n III P П, μm/n IV P П, μm/n V P П, μm/n VI P П, μm/n ISSN Russian Journal of Biomechanics Vol. 19, No. 3: 36-43

6 Mobility of implants: new capability of a known device П, Fig. 4. Dependence of compliance coefficients П on coefficients of damping P. Transverse load: linden is classical screw-type dental implants, is mini dental implants; polyurethane is classical screw-type dental implants, is mini dental implants. Longitudinal load: linden is classical screw-type dental implants, is mini dental implants; polyurethane is classical screw-type dental implants, is mini dental implants; linden ( ) is calculation; polyurethane (+) is calculation Therefore, measurements made with the use of Periotest M will also give information on DI mobility as well as on osteointegration process. When P > 10 (or P n > 0), dental implants fastening strength quickly decreases and, according to manufacturer's guidelines, dental implants cannot be functionally loaded. Here, we must note that, despite considerable difference in implant shapes, the difference between values of coefficients of mobility for classical screw-type dental implants (points 1, 3, 5, 7 in Fig. 4 and Table 3) and mini dental implants (points, 4, 6, 8) is insignificant and they practically do not differ within the measurement accuracy (the linear regression line in Fig. 4 for experimental data, including longitudinal loads, is obtained by the method of least squares, dispersion σ y 0.58). Fig. 4 also shows similar experimental data on connection between damping and compliance coefficients in case of longitudinal impact and longitudinal static load (lines IV-VI in Table 3). It demonstrates that these experimental results are situated on the same curve but lower than in case of transverse load. But, it is no coincidence. Calculations show [3] that in case of elastic deformation of osseous tissue analogs, dental implants displacement at longitudinal loads is approximately.5 times less than at transverse loads. Numerical calculations determining compliance coefficients were made for reliability of results obtained by the method of laser testing. We considered parallelepiped-shaped specimens of linden and polyurethane with dimensions of mm with four screwed classical dental implants structures. The photo of a full-scale specimen of polyurethane with implants is shown in Fig. 5. Fig. 6 demonstrates the distribution of vertical dislacements obtained in a numerical experiment by the finite element method using a virtual model of a full-scale bench. When the extreme implant is loaded by F = 5 N, its displacement comprises = mm = = 10. μm (see the right column in Fig. 6). And since П = /F, then 10. μm / 5 N =.04 μm/n, this value is marked with cross in Fig. 4 (also, the value of compliance coefficient П = 3.75 μm/n for a specimen of polyurethane is marked there with plus + ). ISSN Russian Journal of Biomechanics Vol. 19, No. 3:

7 V.A. Eroshin, M.V. Dzhalalova, A.V. Boyko, S.D. Arutyunov, A.G. Stepanov, A.N. Daov Fig. 5. Photo of a full-scale specimen of polyurethane with screwed implants Fig. 6. Distribution of displacements in a virtual model (the extreme implant is loaded longitudinally) To visualize a picture of displacements distribution, parts of the specimen are cut out near each implant. The transparent grid signifies condition of the virtual model prior to implant loading (an exaggerated scale was chosen specially); the displacement of the first implant slightly pulling the second one is well visible. CONCLUSIONS The research shows that the last version of Periotest M can be used in estimation of an osteointegration level and dental implants readiness for functional load because the manufacturer has managed to eliminate the majority of disadvantages noted before: the value of impact momentum has been reduced (so the device is now less traumatic) and recurrence of measurement results has been improved. Accuracy and representativeness of the research are possible and are reached with the use of a developed device for determination of teeth mobility. Moreover, our research shows that there are excellent opportunities for a further device improvement. Introduction of the new scale will give a physical meaning to measurements and enable to estimate not only dental implants readiness for functional load but also dental implants load-carrying ability on the basis of coefficient of longitudinal damping measurement, i.e. a scientific background will be generated for correction of allowable functional (masticatory) loads. 4 ISSN Russian Journal of Biomechanics Vol. 19, No. 3: 36-43

8 Mobility of implants: new capability of a known device REFERENCES 1. Arutyunov S.D., Eroshin V.A., Stepanov A.G., Boyko A.V., Daov A.N., Matsaberidze L.G. New trends in use of mini dental implants. Russian Bulletin of Dental Implantology, 013, vol. (8), pp Eroshin V.A., Arutyunov S.D., Arutyunov A.S., Unanyan V.E., Boyko A.V. Mobility of dental implants: devices and diagnostic methods. Russian Journal of Biomechanics, 009, vol. 13, no., pp Eroshin V.A., Dzhalalova M.V. Stress-strain state of biomechanical system implant-elastic foundation. Russian Journal of Biomechanics, 01, vol. 16, no 3(57), pp Shulte W. Lukas D. The Periotest method. Int. Dent. J, 1990, vol. 4, no 6, pp Shulte W. What is the significance of the Periotest method currently? Dtsch Zahnarzt Z., 1985, vol. 40, no. 7, pp Received 1 June 015 ISSN Russian Journal of Biomechanics Vol. 19, No. 3:

A THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS OF MANDIBULAR OVERDENTURE SUPPORTED BY CYLINDRICAL AND CONICAL IMPLANTS

A THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS OF MANDIBULAR OVERDENTURE SUPPORTED BY CYLINDRICAL AND CONICAL IMPLANTS A THREE-DIMENSIONAL FINITE ELEMENT ANALYSIS OF MANDIBULAR OVERDENTURE SUPPORTED BY CYLINDRICAL AND CONICAL IMPLANTS Evandro Afonso Sartori, evandroasartori@yahoo.com.br Josué Ricardo Broilo Luiz Oscar

More information

Osstell ISQ. The objective way to measure implant stability. www.osstell.com

Osstell ISQ. The objective way to measure implant stability. www.osstell.com Osstell ISQ. The objective way to measure implant stability. www.osstell.com Three reasons why you need With a success rate above 95%, who needs diagnostics? Implant treatment is one of the most predictable

More information

Force measurement. Forces VECTORIAL ISSUES ACTION ET RÉACTION ISOSTATISM

Force measurement. Forces VECTORIAL ISSUES ACTION ET RÉACTION ISOSTATISM Force measurement Forces VECTORIAL ISSUES In classical mechanics, a force is defined as "an action capable of modifying the quantity of movement of a material point". Therefore, a force has the attributes

More information

METU DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING

METU DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING METU DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING Met E 206 MATERIALS LABORATORY EXPERIMENT 1 Prof. Dr. Rıza GÜRBÜZ Res. Assist. Gül ÇEVİK (Room: B-306) INTRODUCTION TENSION TEST Mechanical testing

More information

Physics 9e/Cutnell. correlated to the. College Board AP Physics 1 Course Objectives

Physics 9e/Cutnell. correlated to the. College Board AP Physics 1 Course Objectives Physics 9e/Cutnell correlated to the College Board AP Physics 1 Course Objectives Big Idea 1: Objects and systems have properties such as mass and charge. Systems may have internal structure. Enduring

More information

COMPUTATIONAL ENGINEERING OF FINITE ELEMENT MODELLING FOR AUTOMOTIVE APPLICATION USING ABAQUS

COMPUTATIONAL ENGINEERING OF FINITE ELEMENT MODELLING FOR AUTOMOTIVE APPLICATION USING ABAQUS International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 7, Issue 2, March-April 2016, pp. 30 52, Article ID: IJARET_07_02_004 Available online at http://www.iaeme.com/ijaret/issues.asp?jtype=ijaret&vtype=7&itype=2

More information

Dentistry Fatigue test for endosseous dental implants. Report No.: 1 ASTRA System Ti Design

Dentistry Fatigue test for endosseous dental implants. Report No.: 1 ASTRA System Ti Design Dentistry Fatigue test for endosseous dental implants Report No.: 1 ASTRA System Ti Design Client: NT - Trading Time of execution: Mai 2011 Subject of work: - - S - 24285 Abutment Ti DesignTM - RESULTS

More information

DESS. Screws. Tijuana Ventas: (664) 685 6294/95 hirambogarin@dabocorp.com. For all major implant systems!! www.dabocorp.com

DESS. Screws. Tijuana Ventas: (664) 685 6294/95 hirambogarin@dabocorp.com. For all major implant systems!! www.dabocorp.com Screws Screws for definitive use. Made from medical grade 5 ELI Titanium Integrity and soundness guaranteed by stress tests of up to 150% of their nominal torques. Their designs ensure a perfect fit with

More information

Making Better Medical Devices with Multisensor Metrology

Making Better Medical Devices with Multisensor Metrology Making Better Medical Devices with Multisensor Metrology by Nate J. Rose, Chief Applications Engineer, Optical Gaging Products (OGP) Multisensor metrology is becoming a preferred quality control technology

More information

Like natural teeth. Treatment procedure with dental implants SINGLE TOOTH REPLACEMENT

Like natural teeth. Treatment procedure with dental implants SINGLE TOOTH REPLACEMENT Like natural teeth Treatment procedure with dental implants SINGLE TOOTH REPLACEMENT Dental implants by Astra Tech like natural teeth Do you suffer from the discomfort of a missing tooth? Oftentimes, missing

More information

Use of Strain Gauge Rosette to Investigate Stress concentration in Isotropic and Orthotropic Plate with Circular Hole

Use of Strain Gauge Rosette to Investigate Stress concentration in Isotropic and Orthotropic Plate with Circular Hole Use of Strain Gauge Rosette to Investigate Stress concentration in Isotropic and Orthotropic Plate with Circular Hole Mr.V.G.Aradhye 1, Prof.S.S.Kulkarni 2 1 PG Scholar, Mechanical department, SKN Sinhgad

More information

Dental Updates. Excerpted Article e-mail: re777@comcast.net. Why Implant Screws Loosen Part 1. Richard Erickson, MS, DDS

Dental Updates. Excerpted Article e-mail: re777@comcast.net. Why Implant Screws Loosen Part 1. Richard Erickson, MS, DDS ¼ ½ ¾ µ mw/cm 2 Volume 17; 2007 Dental Updates "CUTTING EDGE INFORMATION FOR THE DENTAL PROFESSIONAL " 200 SEMINARS AND 30 JOURNALS REVIEWED YEARLY FOR THE LATEST, CUTTING EDGE INFORMATION Excerpted Article

More information

Rock Bolt Condition Monitoring Using Ultrasonic Guided Waves

Rock Bolt Condition Monitoring Using Ultrasonic Guided Waves Rock Bolt Condition Monitoring Using Ultrasonic Guided Waves Bennie Buys Department of Mechanical and Aeronautical Engineering University of Pretoria Introduction Rock Bolts and their associated problems

More information

Implants in your Laboratory: Abutment Design

Implants in your Laboratory: Abutment Design 1/2 point CDT documented scientific credit. See Page 41. Implants in your Laboratory: Abutment Design By Leon Hermanides, CDT A patient s anatomical limitations have the greatest predictive value for successful

More information

METHODS FOR ACHIEVEMENT UNIFORM STRESSES DISTRIBUTION UNDER THE FOUNDATION

METHODS FOR ACHIEVEMENT UNIFORM STRESSES DISTRIBUTION UNDER THE FOUNDATION International Journal of Civil Engineering and Technology (IJCIET) Volume 7, Issue 2, March-April 2016, pp. 45-66, Article ID: IJCIET_07_02_004 Available online at http://www.iaeme.com/ijciet/issues.asp?jtype=ijciet&vtype=7&itype=2

More information

ALL-CERAMIC DENTAL IMPLANT SOLUTIONS

ALL-CERAMIC DENTAL IMPLANT SOLUTIONS ALL-CERAMIC DENTAL IMPLANT SOLUTIONS Scientific Evidence Bone-to-implant contact of 78% at 3 months. One piece implant = no prosthetic connections References 1. One-year follow-up of first consecutive

More information

Resorptive Changes of Maxillary and Mandibular Bone Structures in Removable Denture Wearers

Resorptive Changes of Maxillary and Mandibular Bone Structures in Removable Denture Wearers Resorptive Changes of Maxillary and Mandibular Bone Structures in Removable Denture Wearers Dubravka KnezoviÊ-ZlatariÊ Asja»elebiÊ Biserka LaziÊ Department of Prosthodontics School of Dental Medicine University

More information

Verification Experiment on Cooling and Deformation Effects of Automatically Designed Cooling Channels for Block Laminated Molds

Verification Experiment on Cooling and Deformation Effects of Automatically Designed Cooling Channels for Block Laminated Molds International Journal of Engineering and Advanced Technology (IJEAT ISSN: 2249 8958 Volume-4 Issue-5 June 2015 Verification Experiment on Cooling and Deformation Effects of Automatically Designed Cooling

More information

Structural Integrity Analysis

Structural Integrity Analysis Structural Integrity Analysis 1. STRESS CONCENTRATION Igor Kokcharov 1.1 STRESSES AND CONCENTRATORS 1.1.1 Stress An applied external force F causes inner forces in the carrying structure. Inner forces

More information

EVALUATION OF SEISMIC RESPONSE - FACULTY OF LAND RECLAMATION AND ENVIRONMENTAL ENGINEERING -BUCHAREST

EVALUATION OF SEISMIC RESPONSE - FACULTY OF LAND RECLAMATION AND ENVIRONMENTAL ENGINEERING -BUCHAREST EVALUATION OF SEISMIC RESPONSE - FACULTY OF LAND RECLAMATION AND ENVIRONMENTAL ENGINEERING -BUCHAREST Abstract Camelia SLAVE University of Agronomic Sciences and Veterinary Medicine of Bucharest, 59 Marasti

More information

The mechanical behavior of the bone microstructure around dental implants

The mechanical behavior of the bone microstructure around dental implants BUDAPEST UNIVERSITY OF TECHNOLOGY AND ECONOMICS DEPARTMENT OF STRUCTURAL MECHANICS The mechanical behavior of the bone microstructure around dental implants Summary and Theses of PhD dissertation ÉVA LAKATOS

More information

Measurement of Soil Parameters by Using Penetrometer Needle Apparatus

Measurement of Soil Parameters by Using Penetrometer Needle Apparatus Vol.3, Issue.1, Jan-Feb. 2013 pp-284-290 ISSN: 2249-6645 Measurement of Soil Parameters by Using Penetrometer Needle Apparatus Mahmoud M. Abu zeid, 1 Amr M. Radwan, 2 Emad A. Osman, 3 Ahmed M.Abu-bakr,

More information

CRITERIA FOR PRELOADED BOLTS

CRITERIA FOR PRELOADED BOLTS National Aeronautics and Space Administration Lyndon B. Johnson Space Center Houston, Texas 77058 REVISION A JULY 6, 1998 REPLACES BASELINE SPACE SHUTTLE CRITERIA FOR PRELOADED BOLTS CONTENTS 1.0 INTRODUCTION..............................................

More information

Precision Miniature Load Cell. Models 8431, 8432 with Overload Protection

Precision Miniature Load Cell. Models 8431, 8432 with Overload Protection w Technical Product Information Precision Miniature Load Cell with Overload Protection 1. Introduction The load cells in the model 8431 and 8432 series are primarily designed for the measurement of force

More information

In Class IV arch: Fulcrum line passes through two abutments adjacent to single edentulous space.

In Class IV arch: Fulcrum line passes through two abutments adjacent to single edentulous space. It is that part of removable partial denture which assists the direct retainers in preventing displacement of distal extension denture bases by resisting lever action from the opposite side of the fulcrum

More information

GOM Optical Measuring Techniques. Deformation Systems and Applications

GOM Optical Measuring Techniques. Deformation Systems and Applications GOM Optical Measuring Techniques Deformation Systems and Applications ARGUS Forming Analysis ARGUS Deformation analysis in sheet metal and forming industry Forming Characteristics of Sheet Metals Material

More information

Solid shape molding is not desired in injection molding due to following reasons.

Solid shape molding is not desired in injection molding due to following reasons. PLASTICS PART DESIGN and MOULDABILITY Injection molding is popular manufacturing method because of its high-speed production capability. Performance of plastics part is limited by its properties which

More information

Polarization of Light

Polarization of Light Polarization of Light References Halliday/Resnick/Walker Fundamentals of Physics, Chapter 33, 7 th ed. Wiley 005 PASCO EX997A and EX999 guide sheets (written by Ann Hanks) weight Exercises and weights

More information

THE EFFECT OF THE SPINDLE SYSTEM ON THE POSITION OF CIRCULAR SAW TEETH A STATIC APPROACH

THE EFFECT OF THE SPINDLE SYSTEM ON THE POSITION OF CIRCULAR SAW TEETH A STATIC APPROACH TRIESKOVÉ A BEZTRIESKOVÉ OBRÁBANIE DREVA 2006 12. - 14. 10. 2006 305 THE EFFECT OF THE SPINDLE SYSTEM ON THE POSITION OF CIRCULAR SAW TEETH A STATIC APPROACH Roman Wasielewski - Kazimierz A. Orłowski Abstract

More information

Structural Axial, Shear and Bending Moments

Structural Axial, Shear and Bending Moments Structural Axial, Shear and Bending Moments Positive Internal Forces Acting Recall from mechanics of materials that the internal forces P (generic axial), V (shear) and M (moment) represent resultants

More information

Designing and Drawing a Sprocket Visualizing ideas through the creation of CAD solid models is a key engineering skill.

Designing and Drawing a Sprocket Visualizing ideas through the creation of CAD solid models is a key engineering skill. 05 Webster St. Hanover Massachusetts 0339 Tel. 78 878 5 Fax 78 878 6708 Designing and Drawing a Sprocket Visualizing ideas through the creation of CAD solid models is a key engineering skill. The following

More information

Injection molding equipment

Injection molding equipment Injection Molding Process Injection molding equipment Classification of injection molding machines 1. The injection molding machine processing ability style clamping force(kn) theoretical injection volume(cm3)

More information

Copyright 2011 Casa Software Ltd. www.casaxps.com. Centre of Mass

Copyright 2011 Casa Software Ltd. www.casaxps.com. Centre of Mass Centre of Mass A central theme in mathematical modelling is that of reducing complex problems to simpler, and hopefully, equivalent problems for which mathematical analysis is possible. The concept of

More information

ORTHODONTIC MINI IMPLANTS Clinical procedure for positioning. Orthodontics and Implantology

ORTHODONTIC MINI IMPLANTS Clinical procedure for positioning. Orthodontics and Implantology ORTHODONTIC MINI IMPLANTS Clinical procedure for positioning Orthodontics and Implantology 2 All rights are reserved. Any reproduction of the present publication is prohibited in whole or in part and by

More information

ANALYTICAL AND EXPERIMENTAL EVALUATION OF SPRING BACK EFFECTS IN A TYPICAL COLD ROLLED SHEET

ANALYTICAL AND EXPERIMENTAL EVALUATION OF SPRING BACK EFFECTS IN A TYPICAL COLD ROLLED SHEET International Journal of Mechanical Engineering and Technology (IJMET) Volume 7, Issue 1, Jan-Feb 2016, pp. 119-130, Article ID: IJMET_07_01_013 Available online at http://www.iaeme.com/ijmet/issues.asp?jtype=ijmet&vtype=7&itype=1

More information

Objectives. Experimentally determine the yield strength, tensile strength, and modules of elasticity and ductility of given materials.

Objectives. Experimentally determine the yield strength, tensile strength, and modules of elasticity and ductility of given materials. Lab 3 Tension Test Objectives Concepts Background Experimental Procedure Report Requirements Discussion Objectives Experimentally determine the yield strength, tensile strength, and modules of elasticity

More information

Khaldoon G. Abu Afifeh, B.D.S, M. Sc in Prosthodontics

Khaldoon G. Abu Afifeh, B.D.S, M. Sc in Prosthodontics Khaldoon G. Abu Afifeh, B.D.S, M. Sc in Prosthodontics Diagnosis Diagnosis Diagnosis Implantology Is a Prosthetically Driven Entity. Information Before Treatment is Diagnosis Information after Treatment

More information

Ideal treatment of the impaired

Ideal treatment of the impaired RESEARCH IMPLANTS AS ANCHORAGE IN ORTHODONTICS: ACLINICAL CASE REPORT Dale B. Herrero, DDS KEY WORDS External anchorage Pneumatized Often, in dental reconstruction, orthodontics is required for either

More information

TEPZZ 69 _ZA T EP 2 692 310 A2 (19) (11) EP 2 692 310 A2. (12) EUROPEAN PATENT APPLICATION published in accordance with Art.

TEPZZ 69 _ZA T EP 2 692 310 A2 (19) (11) EP 2 692 310 A2. (12) EUROPEAN PATENT APPLICATION published in accordance with Art. (19) TEPZZ 69 _ZA T (11) EP 2 692 3 A2 (12) EUROPEAN PATENT APPLICATION published in accordance with Art. 13(4) EPC (43) Date of publication: 0.02.14 Bulletin 14/06 (21) Application number: 1276632.0 (22)

More information

Contact: Steve Hurson VP, R & D Nobel Biocare 22715 Savi Ranch Pkwy Yorba Linda, CA 92887 (714) 282-5072 steve.hurson@nobelbiocare.

Contact: Steve Hurson VP, R & D Nobel Biocare 22715 Savi Ranch Pkwy Yorba Linda, CA 92887 (714) 282-5072 steve.hurson@nobelbiocare. Use of CP Titanium and Titanium alloys for Dental Implants Steve Hurson, Nobel Biocare U.S.A. Yorba Linda CA Abstract Professor Per Ingvar Branemark of Sweden published his results on 15 years of research

More information

Ando A., Nakamura Y., Kanbara R., Kumano H., Miyata T., Masuda T., Ohno Y. and Tanaka Y.

Ando A., Nakamura Y., Kanbara R., Kumano H., Miyata T., Masuda T., Ohno Y. and Tanaka Y. 11. The Effect of Abutment Tooth Connection with Extracoronal Attachment using the Three Dimensional Finite Element Method - Part 2. The Construction of Finite Element Model from CT Data - Ando A., Nakamura

More information

Molar Uprighting Dr. Margherita Santoro Division of Orthodontics School of Dental and Oral surgery. Consequences of tooth loss.

Molar Uprighting Dr. Margherita Santoro Division of Orthodontics School of Dental and Oral surgery. Consequences of tooth loss. Molar Uprighting Dr. Margherita Santoro Division of Orthodontics School of Dental and Oral surgery Molars The wide occlusal surface is designed for food grinding. The surface needs to be aligned with the

More information

Proof of the conservation of momentum and kinetic energy

Proof of the conservation of momentum and kinetic energy Experiment 04 Proof of the conservation of momentum and kinetic energy By Christian Redeker 27.10.2007 Contents 1.) Hypothesis...3 2.) Diagram...7 3.) Method...7 3.1) Apparatus...7 3.2) Procedure...7 4.)

More information

SLOT FRINGING EFFECT ON THE MAGNETIC CHARACTERISTICS OF ELECTRICAL MACHINES

SLOT FRINGING EFFECT ON THE MAGNETIC CHARACTERISTICS OF ELECTRICAL MACHINES Journal of ELECTRICAL ENGINEERING, VOL. 60, NO. 1, 2009, 18 23 SLOT FRINGING EFFECT ON THE MAGNETIC CHARACTERISTICS OF ELECTRICAL MACHINES Mohammad B. B. Sharifian Mohammad R. Feyzi Meysam Farrokhifar

More information

INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES. Interpretations of the FTP

INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES. Interpretations of the FTP INTERNATIONAL ASSOCIATION OF CLASSIFICATION SOCIETIES Interpretations of the FTP CONTENTS FTP1 Adhesives used in A or B class divisions (FTP Code 3.1, Res A.754 para. 3.2.3) June 2000 FTP2 Pipe and duct

More information

Numerical Analysis of the Moving Formwork Bracket Stress during Construction of a Curved Continuous Box Girder Bridge with Variable Width

Numerical Analysis of the Moving Formwork Bracket Stress during Construction of a Curved Continuous Box Girder Bridge with Variable Width Modern Applied Science; Vol. 9, No. 6; 2015 ISSN 1913-1844 E-ISSN 1913-1852 Published by Canadian Center of Science and Education Numerical Analysis of the Moving Formwork Bracket Stress during Construction

More information

Rotation: Moment of Inertia and Torque

Rotation: Moment of Inertia and Torque Rotation: Moment of Inertia and Torque Every time we push a door open or tighten a bolt using a wrench, we apply a force that results in a rotational motion about a fixed axis. Through experience we learn

More information

Implant Parts. A Radford Heath Guide http://www.radfordheath.com 1

Implant Parts. A Radford Heath Guide http://www.radfordheath.com 1 Implant Parts A Radford Heath Guide http://www.radfordheath.com 1 Disclaimer The information given in this document has been provided in good faith for basic information purposes only and the information

More information

Algebra 1 2008. Academic Content Standards Grade Eight and Grade Nine Ohio. Grade Eight. Number, Number Sense and Operations Standard

Algebra 1 2008. Academic Content Standards Grade Eight and Grade Nine Ohio. Grade Eight. Number, Number Sense and Operations Standard Academic Content Standards Grade Eight and Grade Nine Ohio Algebra 1 2008 Grade Eight STANDARDS Number, Number Sense and Operations Standard Number and Number Systems 1. Use scientific notation to express

More information

Finite Element Method (ENGC 6321) Syllabus. Second Semester 2013-2014

Finite Element Method (ENGC 6321) Syllabus. Second Semester 2013-2014 Finite Element Method Finite Element Method (ENGC 6321) Syllabus Second Semester 2013-2014 Objectives Understand the basic theory of the FEM Know the behaviour and usage of each type of elements covered

More information

Computer Aided Engineering (CAE) Techniques Applied To Hip Implant

Computer Aided Engineering (CAE) Techniques Applied To Hip Implant International Journal Of Computational Engineering Research (ijceronline.com) Vol. 3 Issue. 3 Computer Aided Engineering (CAE) Techniques Applied To Hip Implant 1, M. S. Abo_Elkhair, 2, M. E. Abo-Elnor,

More information

The Olympus stereology system. The Computer Assisted Stereological Toolbox

The Olympus stereology system. The Computer Assisted Stereological Toolbox The Olympus stereology system The Computer Assisted Stereological Toolbox CAST is a Computer Assisted Stereological Toolbox for PCs running Microsoft Windows TM. CAST is an interactive, user-friendly,

More information

THE EFFECTS OF PITCH AND FLUTING ON INSERTION TORQUE AND PULLOUT STRENGTH OF MINISCREW IMPLANTS

THE EFFECTS OF PITCH AND FLUTING ON INSERTION TORQUE AND PULLOUT STRENGTH OF MINISCREW IMPLANTS THE EFFECTS OF PITCH AND FLUTING ON INSERTION TORQUE AND PULLOUT STRENGTH OF MINISCREW IMPLANTS Christine L. Brinley, B.S., D.M.D. An Abstract Presented to the Faculty of the Graduate School of Saint Louis

More information

MONDOATHENS BASKETBALL SET (Reference PK110)

MONDOATHENS BASKETBALL SET (Reference PK110) MONDOATHENS BASKETBALL SET (Reference PK110) DESCRIPTION The MONDOATHENS backstop unit is mainly designed for multi-sports pavilions and installations where the highest-level basketball competitions are

More information

PROVA DINAMICA SU PALI IN ALTERNATIVA ALLA PROVA STATICA. Pile Dynamic Load test as alternative to Static Load test

PROVA DINAMICA SU PALI IN ALTERNATIVA ALLA PROVA STATICA. Pile Dynamic Load test as alternative to Static Load test PROVA DINAMICA SU PALI IN ALTERNATIVA ALLA PROVA STATICA Pile Dynamic Load test as alternative to Static Load test Gorazd Strnisa, B.Sc.Civ.Eng. SLP d.o.o. Ljubljana ABSTRACT Pile Dynamic test is test

More information

Mechanics. Determining the gravitational constant with the gravitation torsion balance after Cavendish. LD Physics Leaflets P1.1.3.1.

Mechanics. Determining the gravitational constant with the gravitation torsion balance after Cavendish. LD Physics Leaflets P1.1.3.1. Mechanics Measuring methods Determining the gravitational constant LD Physics Leaflets P1.1.3.1 Determining the gravitational constant with the gravitation torsion balance after Cavendish Measuring the

More information

Life Table Analysis for Evaluating Curative-effect of One-stage Non-submerged Dental Implant in Taiwan

Life Table Analysis for Evaluating Curative-effect of One-stage Non-submerged Dental Implant in Taiwan Journal of Data Science 6(2008), 591-599 Life Table Analysis for Evaluating Curative-effect of One-stage Non-submerged Dental Implant in Taiwan Miin-Jye Wen 1, Chuen-Chyi Tseng 2 and Cheng K. Lee 3 1 National

More information

CNC Machine Control Unit

CNC Machine Control Unit NC Hardware a NC Hardware CNC Machine Control Unit Servo Drive Control Hydraulic Servo Drive Hydraulic power supply unit Servo valve Servo amplifiers Hydraulic motor Hydraulic Servo Valve Hydraulic Servo

More information

FABRICATING CUSTOM ABUTMENTS

FABRICATING CUSTOM ABUTMENTS FABRICATING CUSTOM ABUTMENTS LUC AND PATRICK RUTTEN How much should a Dental Technician know about the clinical aspects of implantology? The answer is clear: as much as possible. This is the distinction

More information

Modern Tooth Replacement Strategies & Digital Workflow

Modern Tooth Replacement Strategies & Digital Workflow Modern Tooth Replacement Strategies & Digital Workflow Case Studies by Dr Maurice Salama, DMD AS PUBLISHED BY Dentistry Today, June 2014 Complete Implant Restoration System FACTS: Implant Dentistry Has

More information

Numerical Analysis of Independent Wire Strand Core (IWSC) Wire Rope

Numerical Analysis of Independent Wire Strand Core (IWSC) Wire Rope Numerical Analysis of Independent Wire Strand Core (IWSC) Wire Rope Rakesh Sidharthan 1 Gnanavel B K 2 Assistant professor Mechanical, Department Professor, Mechanical Department, Gojan engineering college,

More information

Numerical Simulation of CPT Tip Resistance in Layered Soil

Numerical Simulation of CPT Tip Resistance in Layered Soil Numerical Simulation of CPT Tip Resistance in Layered Soil M.M. Ahmadi, Assistant Professor, mmahmadi@sharif.edu Dept. of Civil Engineering, Sharif University of Technology, Tehran, Iran Abstract The paper

More information

Miss S. S. Nibhorkar 1 1 M. E (Structure) Scholar,

Miss S. S. Nibhorkar 1 1 M. E (Structure) Scholar, Volume, Special Issue, ICSTSD Behaviour of Steel Bracing as a Global Retrofitting Technique Miss S. S. Nibhorkar M. E (Structure) Scholar, Civil Engineering Department, G. H. Raisoni College of Engineering

More information

Back to Elements - Tetrahedra vs. Hexahedra

Back to Elements - Tetrahedra vs. Hexahedra Back to Elements - Tetrahedra vs. Hexahedra Erke Wang, Thomas Nelson, Rainer Rauch CAD-FEM GmbH, Munich, Germany Abstract This paper presents some analytical results and some test results for different

More information

Tizian TM Creativ RT. Abutment Designer. for the CAD-software version 3.932. Instruction Manual

Tizian TM Creativ RT. Abutment Designer. for the CAD-software version 3.932. Instruction Manual Tizian TM Creativ RT Abutment Designer for the CAD-software version 3.932 Instruction Manual Schütz Dental GmbH 61191 Rosbach, Germany Tel.: +49 6003 / 814-0 Fax: +49 6003 / 814-906 Version: 12/2010 Contents

More information

Biggar High School Mathematics Department. National 5 Learning Intentions & Success Criteria: Assessing My Progress

Biggar High School Mathematics Department. National 5 Learning Intentions & Success Criteria: Assessing My Progress Biggar High School Mathematics Department National 5 Learning Intentions & Success Criteria: Assessing My Progress Expressions & Formulae Topic Learning Intention Success Criteria I understand this Approximation

More information

Contents. Cement retained restoration. Screw retained restoration. Overdenture retained restoration. TS Implant System. 70 ComOcta Gold Abutment

Contents. Cement retained restoration. Screw retained restoration. Overdenture retained restoration. TS Implant System. 70 ComOcta Gold Abutment Contents TS Implant System Cement retained restoration Screw retained restoration 06 Cement-retained bridges with the Solid abutment system (non- 72 Screw retained crown with the ComOcta Gold abutment

More information

Tensile Testing Laboratory

Tensile Testing Laboratory Tensile Testing Laboratory By Stephan Favilla 0723668 ME 354 AC Date of Lab Report Submission: February 11 th 2010 Date of Lab Exercise: January 28 th 2010 1 Executive Summary Tensile tests are fundamental

More information

Traditional Drawing Tools

Traditional Drawing Tools Engineering Drawing Traditional Drawing Tools DRAWING TOOLS DRAWING TOOLS 1. T-Square 2. Triangles DRAWING TOOLS HB for thick line 2H for thin line 3. Adhesive Tape 4. Pencils DRAWING TOOLS 5. Sandpaper

More information

Geometry. Higher Mathematics Courses 69. Geometry

Geometry. Higher Mathematics Courses 69. Geometry The fundamental purpose of the course is to formalize and extend students geometric experiences from the middle grades. This course includes standards from the conceptual categories of and Statistics and

More information

BIOMECHANICAL ANALYSIS OF NORMAL AND IMPLANTED TOOTH USING BITING FORCE MEASUREMENT

BIOMECHANICAL ANALYSIS OF NORMAL AND IMPLANTED TOOTH USING BITING FORCE MEASUREMENT BIOMECHANICAL ANALYSIS OF NORMAL AND IMPLANTED TOOTH USING BITING FORCE MEASUREMENT B K Biswas 1 S Bag 2 & S Pal 3 1. Dept. of Dental Surgery, Associate Professor, KPC Medical College & Hospital, Kolkata,

More information

Dental Implants - the tooth replacement solution

Dental Implants - the tooth replacement solution Dental Implants - the tooth replacement solution Are missing teeth causing you to miss out on life? Missing teeth and loose dentures make too many people sit on the sidelines and let life pass them by.

More information

Problem Set V Solutions

Problem Set V Solutions Problem Set V Solutions. Consider masses m, m 2, m 3 at x, x 2, x 3. Find X, the C coordinate by finding X 2, the C of mass of and 2, and combining it with m 3. Show this is gives the same result as 3

More information

Design of a Universal Robot End-effector for Straight-line Pick-up Motion

Design of a Universal Robot End-effector for Straight-line Pick-up Motion Session Design of a Universal Robot End-effector for Straight-line Pick-up Motion Gene Y. Liao Gregory J. Koshurba Wayne State University Abstract This paper describes a capstone design project in developing

More information

DISTRIBUTION OF LOADSON PILE GROUPS

DISTRIBUTION OF LOADSON PILE GROUPS C H A P T E R 7 DISTRIBUTION OF LOADSON PILE GROUPS Section I. DESIGN LOADS 7-1. Basic design. The load carried by an individual pile or group of piles in a foundation depends upon the structure concerned

More information

In-situ Load Testing to Evaluate New Repair Techniques

In-situ Load Testing to Evaluate New Repair Techniques In-situ Load Testing to Evaluate New Repair Techniques W.J. Gold 1 and A. Nanni 2 1 Assistant Research Engineer, Univ. of Missouri Rolla, Dept. of Civil Engineering 2 V&M Jones Professor, Univ. of Missouri

More information

SCD Case Study. Treatment Considerations for Implant Rehabilitation

SCD Case Study. Treatment Considerations for Implant Rehabilitation SCD Case Study Treatment Considerations for Implant Rehabilitation Multiple surgical and restorative factors play a role in the treatment planning of implant restorations for the edentulous patient (Ali

More information

CHAPTER 10 RESTS AND PREPARATIONS. 4. Serve as a reference point for evaluating the fit of the framework to the teeth.

CHAPTER 10 RESTS AND PREPARATIONS. 4. Serve as a reference point for evaluating the fit of the framework to the teeth. CHAPTER 10 RESTS AND DEFINITIONS A REST is any rigid part of an RPD framework which contacts a properly prepared surface of a tooth. A REST PREPARATION or REST SEAT is any portion of a tooth or restoration

More information

The Bonelle Tool and Cutter Grinder

The Bonelle Tool and Cutter Grinder The Bonelle Tool and Cutter Grinder The grinder was constructed about 1987 and exhibited at the 89th Model Engineering exhibition where it was awarded a bronze medal (see ME Vol164 No 3868 page 273). Subsequently

More information

METHOD STATEMENT HIGH STRIAN DYNAMIC TESTING OF PILE. Prepared by

METHOD STATEMENT HIGH STRIAN DYNAMIC TESTING OF PILE. Prepared by METHOD STATEMENT HIGH STRIAN DYNAMIC TESTING OF PILE Prepared by Infratech ASTM CO., LTD. Contents Chapter Description Page Contents...... 1 List of Appendix. 1 1. Introduction.. 2 2. Test Method..2 3.

More information

SPINDLE ERROR MOVEMENTS MEASUREMENT ALGORITHM AND A NEW METHOD OF RESULTS ANALYSIS 1. INTRODUCTION

SPINDLE ERROR MOVEMENTS MEASUREMENT ALGORITHM AND A NEW METHOD OF RESULTS ANALYSIS 1. INTRODUCTION Journal of Machine Engineering, Vol. 15, No.1, 2015 machine tool accuracy, metrology, spindle error motions Krzysztof JEMIELNIAK 1* Jaroslaw CHRZANOWSKI 1 SPINDLE ERROR MOVEMENTS MEASUREMENT ALGORITHM

More information

Quantitative Inventory Uncertainty

Quantitative Inventory Uncertainty Quantitative Inventory Uncertainty It is a requirement in the Product Standard and a recommendation in the Value Chain (Scope 3) Standard that companies perform and report qualitative uncertainty. This

More information

Removing chips is a method for producing plastic threads of small diameters and high batches, which cause frequent failures of thread punches.

Removing chips is a method for producing plastic threads of small diameters and high batches, which cause frequent failures of thread punches. Plastic Threads Technical University of Gabrovo Yordanka Atanasova Threads in plastic products can be produced in three ways: a) by direct moulding with thread punch or die; b) by placing a threaded metal

More information

Onboard electronics of UAVs

Onboard electronics of UAVs AARMS Vol. 5, No. 2 (2006) 237 243 TECHNOLOGY Onboard electronics of UAVs ANTAL TURÓCZI, IMRE MAKKAY Department of Electronic Warfare, Miklós Zrínyi National Defence University, Budapest, Hungary Recent

More information

Pattern Classification Techniques for the Ultrasonographic Periodontal Probe Introduction Figure 1:

Pattern Classification Techniques for the Ultrasonographic Periodontal Probe Introduction Figure 1: Pattern Classification Techniques for the Ultrasonographic Periodontal Probe Crystal Bertoncini Nondestructive Evaluation Laboratory The College of William and Mary Introduction In the clinical practice

More information

Competence gives security. A competitive edge in rotary axes through experience, simulation, calculation, testing

Competence gives security. A competitive edge in rotary axes through experience, simulation, calculation, testing Competence gives security A competitive edge in rotary axes through experience, simulation, calculation, testing Bearings for rotary axes Competence gives security Figure 1: Axial/radial bearing YRTSM

More information

Oftentimes, as implant surgeons, we are

Oftentimes, as implant surgeons, we are CLINICAL AVOIDING INJURY TO THE INFERIOR ALVEOLAR NERVE BY ROUTINE USE OF INTRAOPERATIVE RADIOGRAPHS DURING IMPLANT PLACEMENT Jeffrey Burstein, DDS, MD; Chris Mastin, DMD; Bach Le, DDS, MD Injury to the

More information

NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES

NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES Vol. XX 2012 No. 4 28 34 J. ŠIMIČEK O. HUBOVÁ NUMERICAL ANALYSIS OF THE EFFECTS OF WIND ON BUILDING STRUCTURES Jozef ŠIMIČEK email: jozef.simicek@stuba.sk Research field: Statics and Dynamics Fluids mechanics

More information

NUMERICAL MODELLING OF PIEZOCONE PENETRATION IN CLAY

NUMERICAL MODELLING OF PIEZOCONE PENETRATION IN CLAY NUMERICAL MODELLING OF PIEZOCONE PENETRATION IN CLAY Ilaria Giusti University of Pisa ilaria.giusti@for.unipi.it Andrew J. Whittle Massachusetts Institute of Technology ajwhittl@mit.edu Abstract This paper

More information

Supervisors: Dr. Farhan Raza Khan

Supervisors: Dr. Farhan Raza Khan 1 Presenter: Dr. Sana Ehsen Supervisors: Dr. Farhan Raza Khan 2 A dental implant (also known as an endosseous implant or fixture) is a surgical component that interfaces with the bone of the jaw to support

More information

Holes in a bottle filled with water: which water-jet has the largest range?

Holes in a bottle filled with water: which water-jet has the largest range? Holes in a bottle filled with water: which water-jet has the largest range? Gorazd Planinšič, Christian Ucke and Laurence Viennot. ABSTRACT In some textbooks, a simple experiment is often presented about

More information

KEANSBURG SCHOOL DISTRICT KEANSBURG HIGH SCHOOL Mathematics Department. HSPA 10 Curriculum. September 2007

KEANSBURG SCHOOL DISTRICT KEANSBURG HIGH SCHOOL Mathematics Department. HSPA 10 Curriculum. September 2007 KEANSBURG HIGH SCHOOL Mathematics Department HSPA 10 Curriculum September 2007 Written by: Karen Egan Mathematics Supervisor: Ann Gagliardi 7 days Sample and Display Data (Chapter 1 pp. 4-47) Surveys and

More information

Ridge Reconstruction for Implant Placement

Ridge Reconstruction for Implant Placement Volume 1, No. 5 July/August 2009 The Journal of Implant & Advanced Clinical Dentistry Ridge Reconstruction for Implant Placement 2 Hours of CE Credit Oral Implications of Cancer Chemotherapy Immediate

More information

bi directional loading). Prototype ten story

bi directional loading). Prototype ten story NEESR SG: Behavior, Analysis and Design of Complex Wall Systems The laboratory testing presented here was conducted as part of a larger effort that employed laboratory testing and numerical simulation

More information

MATERIALS AND SCIENCE IN SPORTS. Edited by: EH. (Sam) Froes and S.J. Haake. Dynamics

MATERIALS AND SCIENCE IN SPORTS. Edited by: EH. (Sam) Froes and S.J. Haake. Dynamics MATERIALS AND SCIENCE IN SPORTS Edited by: EH. (Sam) Froes and S.J. Haake Dynamics Analysis of the Characteristics of Fishing Rods Based on the Large-Deformation Theory Atsumi Ohtsuki, Prof, Ph.D. Pgs.

More information

Current Standard: Mathematical Concepts and Applications Shape, Space, and Measurement- Primary

Current Standard: Mathematical Concepts and Applications Shape, Space, and Measurement- Primary Shape, Space, and Measurement- Primary A student shall apply concepts of shape, space, and measurement to solve problems involving two- and three-dimensional shapes by demonstrating an understanding of:

More information

International Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online http://www.ijoer.

International Journal of Engineering Research-Online A Peer Reviewed International Journal Articles available online http://www.ijoer. RESEARCH ARTICLE ISSN: 2321-7758 DESIGN AND DEVELOPMENT OF A DYNAMOMETER FOR MEASURING THRUST AND TORQUE IN DRILLING APPLICATION SREEJITH C 1,MANU RAJ K R 2 1 PG Scholar, M.Tech Machine Design, Nehru College

More information

F1 Fuel Tank Surging; Model Validation

F1 Fuel Tank Surging; Model Validation F1 Fuel Tank Surging; Model Validation Luca Bottazzi and Giorgio Rossetti Ferrari F1 team, Maranello, Italy SYNOPSIS A Formula One (F1) car can carry more than 80 kg of fuel in its tank. This has a big

More information

Choose What Feels Right. Bridge vs. Dental Implant

Choose What Feels Right. Bridge vs. Dental Implant Choose What Feels Right Bridge vs. Dental Implant THE CHOICE THAT FEELS RIGHT A missing tooth just doesn t feel right. It can be uncomfortable, make it difficult to chew and perhaps worst of all, hold

More information

DEM modeling of penetration test in static and dynamic conditions

DEM modeling of penetration test in static and dynamic conditions DEM modeling of penetration test in static and dynamic conditions Quoc Anh Tran, Bastien Chevalier, Pierre Breul To cite this version: Quoc Anh Tran, Bastien Chevalier, Pierre Breul. DEM modeling of penetration

More information