Guidelines for Flapless Surgery

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1 BASI AND PATIENT-IENTED ESEAH ATIE IN PESS J ral Maxillofac Surg xx:xxx, 2007 Guidelines for Flapless Surgery Anthony G. Sclar, DMD* With the introduction ofi n-office cone beam computed tomography (T), improved access to conventional T scanning, and dental implant treatment planning software allowing on-the-spot 3-dimensional evaluations of potential implant sites, the use of flapless implant surgery has gained popularity among surgeons. Although the flapless approach was initially suggested for and embraced by novice implant surgeons, the successful use of this approach often requires advanced clinical experience and surgical judgment. This article reviews the advantages and disadvantages of and indications and contraindications for flapless dental implant surgery, with special emphasis on requirements for establishing or maintaining long-term health and stability of the peri-implant soft tissues. Prerequisites for surgeons wishing to use the flapless tissue punch approach in dental implant surgery are outlined and put into perspective relative to conventional open-flap surgery techniques and other minimally invasive procedures currently used in implant surgery. Procedures for single- and multiple-tooth applications are illustrated American Association of ral and Maxillofacial Surgeons J ral Maxillofac Surg xx:xxx, 2007 F1 AQ: 1 *Director of linical esearch and Postgraduate Dental Implant Surgery, Department of ral and Maxillofacial Surgery, ollege of Dental Medicine, Nova Southeastern University, Fort auderdale- Davie, F. Address correspondence and reprint requests to Dr. Sclar: South Florida MS, 7600 ed oad, Suite 101, Miami, F 33143; American Association of ral and Maxillofacial Surgeons /07/xx0x-0$32.00/0 doi: /j.joms Some of the earliest applications of the flapless approach in dental implant surgery involved innovative site preservation techniques developed for immediate or delayed implant placement after tooth extraction in areas of high esthetic concern. The rationale for the flapless approach in these case scenarios was to isolate the implant and/or grafted socket from the oral cavity obtaining an inclusive guided bone regeneration effect while preserving circulation and esthetic soft tissue contours. 1 This was a radical departure from the then strongly supported concept of isolating implants placed into fresh extraction sockets with a barrier membrane and primary flap closure. 2 In addition, mounting clinical experience demonstrated that esthetic hard tissue contours were also maintained by using minimally traumatic extraction techniques and substitution bone graft materials. This approach yielded predictable results even in the most challenging case scenarios with multiple contiguous implants placed in areas of high esthetic concern ( Fig 1). With the introduction of-in office cone beam computed tomography (T), improved access to conventional T scanning, and new dental implant treatment planning software allowing 3-dimensional evaluation of potential implant sites, the use of flapless surgery for implant placement has been gaining popularity among implant surgeons. In its simplest form, flapless surgery involves using a tissue punch device to gain access to the alveolar ridge for implant placement or abutment connection ( Fig 2). Although the flapless approach was initially suggested for and embraced by novice implant surgeons, the successful use of this approach often requires advanced clinical experience and surgical judgment. Although flapless implant surgery has numerous advantages, including preservation of circulation, soft tissue architecture, and hard tissue volume at the site; decreased surgical time; improved patient comfort; and accelerated recuperation, allowing the patient to resume normal oral hygiene procedures immediately after, the approach does have some drawbacks. Some of these include the surgeon s inability to visualize anatomic landmarks and vital structures, the potential for thermal damage secondary to reduced access for external irrigation during osteotomy preparation, the increased risk of malposed angle or depth ofi mplant placement, a decreased ability to contour osseous topography when needed to facilitate restorative procedures and to optimize soft tissue contours, and, most importantly, the surgeon s inability to manipulate soft tissues to ensure circumferential adaptation of adequate dimensions of keratinized gingival tissues around emerging implant structures. As such, there are certain prerequisites for surgeons wishing to use the flapless approach for im- F2 1

2 ATIE IN PESS 2 GUIDEINES F FAPESS SUGEY UNETED PF FIGUE 1. eplacement o ailing maxillary incisors with multiple adjacent implants using a s approach. A and B, Preoperative radiographs demonstrating maxillary incisors with unfavorable root morphology and moderate horizontal bone loss., Three adjacent 1-piece nonsubmerged implants (Straumann USA, Andover, MA) were placed with the Bio-ol ridge preservation technique immediately after s tooth removal facilitated by the use of periotomes.d and E, Postoperative radiographs documenting ideal placement of 3 adjacent implants and the lack of t surgical and restorative dimension to allow placement of a fourth implant. (Figure 1 continued on next page.) Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

3 ATIE IN PESS ANTHNY G. SKA 3 FIGUE 1 (cont d). F, Three-month postoperative view showing that the s approach combined with the early tissue molding provided by Esthetic Plus abutments (Straumann USA, Andover, MA) resulted in preservation of esthetic soft tissue volume and contours. The implant sites are ready for provisional restoration.g, ne year postdelivery of l restoration (18 months postimplant placement) demonstrates that under circumstances, multiple adjacent implants can be successfully used in areas of high esthetic concern. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg plant placement and uncovering procedures. These include in-depth knowledge of the criteria for optimal p designs used in dental implant surgery, as well as the clinical goals for surgical management of periimplant soft tissues. The surgeon should also be knowledgeable regarding the indications and techniques (soft tissue surgical maneuvers) commonly required for successful management of peri-implant soft tissues during conventional open p surgery. Finally, the surgeon should be familiar with other available minimally invasive techniques that incorporate abbreviated incisions and, as well as pouch and tunnel dissections, because these approaches may be more l than the s tissue punch approach in many clinical scenarios. A m grasp of the information just outlined, combined with clinical experience, with will allow the implant surgeon to put s surgery in proper perspective relative to conventional p surgery and other minimally invasive approaches. To begin with, the surgeon should be familiar with the following criteria for optimal p designs used in dental implant surgery: (1) preserve circulation and alveolar ridge topography; (2) provide access for required

4 ATIE IN PESS 4 GUIDEINES F FAPESS SUGEY FIGUE 2. Tissue punch devices for flapless implant surgery. Handheld punch (Uni-Punch; Premier Medical, King of Prussia, PA) and rotary tissue punch (Salvin Dental Specialties, harlotte, N) devices are available in multiple diameters corresponding to commonly available implant diameters. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg implant instrumentation; (3) allow identification of vital structures; (4) provide access for modifying osseous contours and/or local bone harvest when indicated; (5) provide for closure away from submerged fixture installation or augmentation sites; (6) minimize postsurgical bacterial contamination; (7) facilitate flap elevation, retraction, and wound closure; and (8) aid in achieving circumferential adaptation of good-quality tissues around emerging implant structures. 3 Although Brånemark et al 4 originally advocated using flaps incorporating vestibular incisions, buccal flaps initiated with pericrestal incisions have been shown to provide a practical and effective approach to implant placement, abutment connection, and ancillary grafting procedures. 3 Typically, the buc - cal flap is outlined by a pericrestal incision and 1 or more vertical releasing incisions located at the mesial and distal extent of the site. The surgeon simply adjusts the position and bevel of the pericrestal incision to accommodate for submerged or nonsubmerged implant placement and abutment connection procedures. The implant surgeon also must be familiar with the clinical goals and guidelines for surgical management of peri-implant soft tissues. The clinical goal of this surgical management is to establish an adequate zone, approximately 3.0 mm in apicocoronal dimension (width), of attached nonmobile, preferably keratinized, soft tissue that is circumferentially adapted to the transmucosal implant structures. 3 Doing so provides the epithelial and connective tissue elements needed for soft tissue integration and the development of circumferential biological width without sacrificing the underlying peri-implant supporting bone. 5 Although long-term success is possible with less than the recommended 3.0 mm of keratinized tissue surrounding an implant restoration, predictability is far greater with the recommended amount, because the tissues are better able to withstand the trauma of prosthetic procedures, abutment connection, and reconnection; the forces of mastication and oral hygiene maintenance; and the mechanical challenges presented by removable implant prosthesis secured by resilient prosthetic attachments. Nevertheless, it is also important for the surgeon to recognize that tissue thickness plays a significant role in surgical decision making with regard to the selection of appropriate soft tissue surgical maneuvers during implant surgery and determination of when soft tissue augmentation is needed to prevent progressive tissue recession. ong-term clinical observations indicate that ideal tissues thickness is somewhere between 2.5 and 3.0 mm, and that the presence of adequate soft tissue thickness greatly contributes to the maintenance of a stable peri-implant soft tissue environment. In addition, the combination of adequate soft tissue thickness and apicocoronal dimension of keratinized tissue surrounding an implant restoration helps resist recession, protects peri-implant crestal bone levels, and provides esthetic masking of underlying metal components. Furthermore, at the ideal tissue thickness, a reduction in the apicocoronal width of keratinized tissue may become acceptable. Finally, in areas of high esthetic concern, along with the objectives outlined earlier, preservation or reconstruction of esthetic soft tissue contours is required to ensure that the peri-implant gingival tissues are in harmony with the soft tissues surrounding the adjacent natural dentition in terms off orm, color, and surface texture. In many cases, this requires greater apicocoronal dimensions of keratinized gingival tissues than recommended earlier. Another prerequisite for implant surgeons desiring to perform flapless implant surgery includes awareness of the indications and the surgical technique (soft tissue surgical maneuvers) commonly used for successful management of peri-implant tissues. 3 When placing a nonsubmerged implant or performing

5 ATIE IN PESS ANTHNY G. SKA 5 Table 1. GUIDEINES F SEETING SFT TISSUE SUGIA MANEUVES Width of Keratinized Gingiva Present on Buccal Flap Margin Indicated Surgical Maneuver 5 to 6 mm esective contouring 4 to 5 mm Papilla regeneration (Palacci) 3 to 4 mm ateral flap advancement Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg abutment connection to a submerged implant, optimal flap design dictates locating the pericrestal incision such that approximately 3.0 mm of good-quality keratinized tissue remains on the oral aspect of the emerging implant structures. Then the apicocoronal dimension (width) of the keratinized gingival remaining on the elevated buccal flap guides the surgeon in selecting the appropriate surgical maneuver for that particular site, keeping in mind the need to obtain a circumferential adaptation of approximately 3.0 mm of keratinized tissue surrounding the emerging implant (Table 1). esective contouring (gingivectomy) is indicated when the apicocoronal dimension of keratinized gingival remaining on the buccal flap adjacent to the implant site is 5 to 6 mm ( Fig 3). Typically, the surgeon begins by passively aligning the flap adjacent to implant abutment at one end of the surgical site and uses a low-profile scalpel (eg, a 15c blade) to perform the resection. The flap is then secured mesial and distal to that abutment with interrupted sutures. Next the surgeon evaluates the width of tissue at the adjacent sites and, ifi ndicated, sequentially performs the resective contouring maneuver at each site and secures the flap to obtain circumferential tissue adaptation around the remaining abutments (Figs 3B,). The papilla regeneration technique, as originally described by Palacci, 6 is indicated when 4 to 5 mm of keratinized tissue remains on the buccal flap margin adjacent to the implant site in question. This technique is very useful for obtaining circumferential closure of good-quality tissue around the emerging im- T1 F3 FIGUE 3. esective contouring. A, When apicocoronal dimension of keratinized tissue remaining on the buccal flap is between 5 and 6 mm, the resective contouring maneuver is used to obtain circumferential tissue closure around the emerging implant neck or abutment. After outlining the flap, tissue is taken from the top of the ridge and moved in a buccal direction. B, A 15c scalpel is used to precisely perform the gingivectomy adjacent to the emerging implant neck, after which the tissue is adapted around the abutment and, if appropriate, the resection is repeated sequentially adjacent to each implant site., The contoured flap is then apically repositioned and secured around each emerging implant with sutures placed in the interimplant areas. (eprinted with permission. 3 ) Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

6 ATIE IN PESS 6 GUIDEINES F FAPESS SUGEY FIGUE 4. Papilla regeneration. A, When apicocoronal dimension of keratinized tissue remaining on the buccal p is between 4 and 5 mm, the papilla regeneration maneuver is indicated to obtain circumferential tissue closure around the emerging implant neck or abutment. After outlining the, tissue is taken from the top of the ridge and moved in a buccal direction. Pedicles that correspond to the interimplant spaces are then created in the margin of the p using a e scalpel. B,The pedicles are then rotated into the interimplant space. A reverse cutback facilitates passive rotation of the pedicle without embarrassing its circulation., After adapting the, 8 or interrupted sutures are used to obtain circumferential tissue closure around the emerging implants. (eprinted with permission. 3 ) Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg F4 F5 plant structures ( Fig 4A). The use of this technique also promotes the formation of an interimplant papilla when adequate bone support is present and ideal spacing between implants has been achieved. In a fashion similar to the resection maneuver, the surgeon passively aligns the p adjacent to the implant abutment and places light pressure near the p margin with his or her r tip after, then uses a lowe blade to create a pedicle in the margin of the p in such a fashion to allow passive rotation into the adjacent interdental or interimplant space ( Fig 4B). The p is then secured with 8 or simple interrupted sutures in a fashion that avoids tension in the pedicle, which could embarrass its circulation causing necrosis ( Fig 4). ateral p advancement is the indicated surgical maneuver when only 3 to 4 mm of keratinized tissue width remains on the buccal p ( Fig 5A). To from this soft tissue maneuver, the pericrestal incision must be extended well beyond the area o mplantation, to allow lateral advancement of keratinized tissue into the implant site (Figs 5A,B). The p is then secured with interrupted sutures, typically resulting in exposure of alveolar bone distal or mesial to the site. losure at the areas of bone exposure is obtained through mucosal advancement, or, in some cases, a protective dressing is applied in this area ( Fig 5). In Kennedy class III situations, the p is extended through split-thickness dissection to allow advancement of a portion of the keratinized tissue present around the adjacent natural dentition into the implant site without encroaching on the marginal gingival tissues. Preoperative assessment allows the surgeon to determine whether t apicocoronal dimension of keratinized tissue is present around the adjacent dentition to allow for this. When the apicocoronal dimension of keratinized tissue surrounding an implant restoration is or will be 3.0 mm, the surgeon should consider using soft tissue augmentation procedures to provide for longterm stability. The propensity for progressive periimplant soft tissue recession is multiplied when inadequate tissue thickness is combined with reduced keratinized tissue width at a particular site.

7 ATIE IN PESS ANTHNY G. SKA 7 FIGUE 5. ateral p advancement.a, When the apicocoronal dimension of keratinized tissue remaining on the buccal p is between 3 and 4 mm, resective maneuvers may result in less than the ideal soft tissue dimensions required to establish a stable hard and soft tissue peri-implant environment. Instead, the lateral p advancement maneuver is used to obtain circumferential tissue closure around the permucosal implant components. After outlining a p that extends well beyond the planned implant surgery site, tissue is taken from the top of the ridge and moved in a buccal direction. B and, The resultant p is apically repositioned and adapted around the emerging implant structures and, in most instances, the closure begins at the anterior most implant and progresses distally with sutures placed in the interimplant areas. As a consequence, the keratinized tissues are advanced into the implant surgery site from adjacent areas. (eprinted with permission. ) 3 Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg F6 F7-8 F9 Along with having in-depth knowledge of the clinical goals, guidelines, and surgical techniques used for successful management of peri-implant soft tissues, the implant surgeon also should be familiar with other minimally invasive approaches for implant placement, exposure, and grafting, such as U-shaped peninsula s (Fig 6), abbreviated trapezoidal, and pouch or tunnel dissections, which can have advantages comparable to those of the s tissue punch approach with improved access and visualization ( Figs 7 and 8). 3 Furthermore, the surgeon should consider using instrumentation that minimizes tissue trauma and helps preserve soft tissue volume, which is in concert with the underlying concept of minimally invasive surgery. High-frequency (4 MHz) radio surgery instrumentation allows the implant surgeon to maintain a relatively bloodless d during minimally invasive procedures, thus maximizing intraoperative visibility ( Fig 9). This provides a intraoperative for surgeons performing implant surgery and adjunctive procedures through the minimally invasive approaches described earlier. In addition, this technology allows the surgeon to perform very e incisions in precise locations with negligible lateral tissue damage, resulting in maximum tissue preservation at the site. 7 Finally, armed with the necessary prerequisites outlined earlier, the surgeon can take full advantage of the s approach in dental implant surgery. The s (tissue punch) approach is indicated when the surgeon has e that the underlying osseous anatomy is ideal relative to the planned implant diameter and 3-dimensional placement in the alveolus. Typically, this is determined by clinical and radiographic evaluation, aided by analysis of articulated dental study models. Nevertheless, interactive T treatment planning is of great t for evaluating osseous ridge morphology in a t percentage of cases. In cases where site preservation is performed at the time of tooth removal, the surgeon should closely observe and document the dimensions of the remaining alveolar housing and the morphol-

8 ATIE IN PESS 8 GUIDEINES F FAPESS SUGEY of good-quality soft tissues will remain surrounding the emerging implant structures for optimal function and esthetics. To minimize soft tissue complications that can jeopardize the long-term success of an implant restoration, the quantity, quality, and position of the existing keratinized tissues relative to the planned implant emergence should be evaluated before surgery. 3 This evaluation is facilitated by a preoperative try-in of the surgical template, allowing the surgeon to determine whether adequate apicocoronal width of keratinized tissue will remain after a tissue punch procedure to establish a stable peri-implant soft tissue environment, as discussed earlier. To make this determination, the implant surgeon must be familiar with the criteria for optimal flap designs used for implant placement and exposure as outlined earlier ( Fig 10). When these criteria are not met, the flapless approach is contraindicated ( Fig 11). Finally, when unexpected intraoperative findings necessitate additional access or visualization, the surgeon must be prepared for the appropriate course of action ( Fig 12). F10 F11 F12 FIGUE 6. The U-shaped peninsula flap. This flap provides the advantages of tissue preservation and patient comfort associated with the flapless tissue punch approach with enhanced visualization of osseous anatomy during implant surgeries. (eprinted with permission. 3 ) Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg ogy of any socket wall defects. This information will allow the surgeon to decide whether a flapless approach will be feasible for subsequent implant placement in most cases when delayed implant placement is planned after the tooth extraction. Most importantly, as outlined earlier, the surgeon also must be able to determine whether an adequate volume eferences 1. Sclar AG: Preserving alveolar ridge anatomy following tooth removal in conjunction with immediate implant placement: The Bio-ol technique. Atlas ral Maxillofac Surg lin North Am 7:, azzara J: Immediate implant placement into extraction sites: Surgical and restorative advantages. Int J Periodont est Dent 9:333, Sclar AG: Surgical techniques for management of peri-implant soft tissues. In : Soft Tissue and Esthetic onsiderations in Implant Therapy. hicago, I, Quintessence, 2003, p Branemark P-I, Zarb GA, Albrektsson T: Tissue-Integrated Prostheses: steointegration in linical Dentistry. hicago, I, Quintessence, 1985, p Berglundh T, indhe J: Dimension of the peri-implant mucosa: Biologic width revisited. J lin Periodontol 23:971, Palacci P, Ericsson I, Engstrand P, et al: ptimal Implant Positioning and Soft Tissue Management for the Brånemark System. hicago, I, Quintessence, 1995, p Niamtu J: 4.0-MHz radiowave surgery in cosmetic facial surgery. Australas J osmetic Surg 1:52, Sclar AG: The Bio-ol technique. In : Soft Tissue and Esthetic onsiderations in Implant Therapy. hicago, I, Quintessence, 2003, p 75 AQ: 2 AQ: 3 AQ: 4

9 ATIE IN PESS ANTHNY G. SKA 9 FIGUE 7. Abbreviated flap-pouch procedure.a, An abbreviated flap is outlined by incisions that are beveled toward the center of the site that end at the mucogingival junction.b, After subperiosteal elevation of the abbreviated flap, surgical access and visualization is enhanced by extending the dissection further apically (pouch dissection), allowing a guided bone regeneration procedure to be performed to repair a fenestration defect., The beveled portions of the flap are precisely readapted and simple interrupted sutures are used for closure at both lateral incisor sites. D, By combining an abbreviated flap with a subperiosteal pouch, an ideal esthetic result was obtained. This minimally invasive approach provided access for performing the guided bone regeneration procedure without extensive flap elevation that can result in flap retraction and soft tissue shrinkage. The papillary sparing beveled incisions resulted in inconspicuous incision lines and maintenance of scalloped soft tissue architecture. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

10 ATIE IN PESS 10 GUIDEINES F FAPESS SUGEY FIGUE 8.

11 ATIE IN PESS ANTHNY G. SKA 11 FIGUE 8. Use of minimally invasive procedures for esthetic implant replacement off ractured central incisor and repair of associated labial bone and soft tissue recession defects. (eprinted with permission. 8 )A, Preoperative frontal view demonstrated tissue inflammation and discoloration resulting from tooth fracture and tooth mobility. Soft tissue shrinkage is expected after tooth removal despite use of ridge preservation. B, Preoperative radiograph demonstrating widened periodontal ligament space and apical radiolucency., Types ofl abial bone defect after tooth removal. Whereas labial bone defects whose widths are 1/3 the width of the site or less have a favorable prognosis of regeneration when site preservation procedures are performed, those wider than 1/3 of the width of the site have an unfavorable prognosis despite site preservation. The defect in this case had a favorable morphology. D, A pouch procedure was used to dissect in a subperiosteal plane extending 2.0 mm beyond the periphery of the defect. An absorbable collagen membrane (Bio-Gide; steohealth, ceanside, NY) was carefully positioned within the pouch after which Bio-ss anorganic bovine bone mineral was condensed in the extraction socket. This creates a tenting effect of the periosteum overlying the labial bone defect. The membrane was folded over the occlusal portion of the porous bovine mineral graft and an absorbable collagen dressing (ollaplug; Zimmer Dental, arlsbad, A) was placed to further isolate the site, support the supraosseous soft tissues, and to promote rapid connective tissue in growth and epithelialization of the site. Iso-butyl cyanoacrylate tissue cement (IsoDent; Ellman International, ceanside, NY) was then placed over the collagen dressing to render the site impervious to oral liquids. E, The postextraction site preservation radiograph. F, Four months after tooth removal, flapless implant placement was facilitated using a rotary tissue punch. Sharp dissection was used to create a supraperiosteal pouch, which served as a recipient site for a subepithelial connective tissue graft harvested from the maxillary tuberosity. G and H, Smile and close-up fontal views of the implant restoration 18 months after delivery of the final restoration. Flapless tooth extraction and delayed implant placement combined with minimally invasive pouch approaches for repair of the favorable labial bone defect and subsequent soft tissue reconstruction yielded an excellent esthetic result in this case of high esthetic concern. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

12 ATIE IN PESS 12 GUIDEINES F FAPESS SUGEY FIGUE 9. Application of 4-MHz radio surgery in minimally invasive dental implant surgery. The 4-MHz radio surgery technology (Surgitron; Ellman International, ceanside, NY) allows the surgeon to perform incisions with minimal heat dissipation and cellular alteration. Very fine incisions can be precisely located adjacent to implant abutments without the risk of unanticipated soft tissue recession. The relatively bloodless surgical field achieved using this instrumentation provides a tremendous advantage for surgeons performing minimally invasive dental implant surgery. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

13 ATIE IN PESS ANTHNY G. SKA 13 FIGUE 10. Application of the flapless approach for implant replacement of a failing mandibular molar. A, Preoperative radiograph of a failing mandibular molar. The patient had experienced continued sensitivity after completing endodontic therapy over a 2-year period. Note the radiolucency in the interradicular area indicating a chronic inflammatory process most likely associated with bacterial ingress. B, Three months postextraction with site preservation with the Bio-ol technique, the location and apicocoronal dimension of keratinized tissue at the site is ideal for placement of the implant through a flapless approach., ne week post-flapless implant placement. Peri-implant tissue health is ideal, and the papillary and col anatomy have been preserved. Note that adequate apicocoronal dimension of keratinized tissue surround the implant despite the tissue punch procedure. Accelerated healing and improved postoperative oral hygiene are evident. D and E, linical and radiographic views 1 year postdelivery of the final restoration. The flapless approach for tooth extraction, site preservation, and subsequent implant placement preserved the hard and soft tissue ridge contours facilitating the delivery of an implant restoration that is functional, self-cleansing, and esthetically pleasing. Note the complete resolution of preexisting radiolucency and maintenance ofi deal crestal bone levels. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

14 ATIE IN PESS 14 GUIDEINES F FAPESS SUGEY FIGUE 11. Determining whether flapless surgery is indicated for implant placement. A, Preoperative try-in of surgical template indicated that the flapless approach was contraindicated at the first molar implant site. Nevertheless, during surgery, a round bur was used to mark the center of the implant osteotomy by penetrating through the soft tissues at the ridge crest before elevation of the abbreviated flap seen here. The location of the soft tissue puncture clearly demonstrates that the use of a 6.0-mm tissue punch would have excised all the keratinized tissue buccal to the emerging first molar implant. Note that a tissue punch approach would have been feasible for the second molar site. B, In this case, ideal tissue thickness allowed the use of a variation of the papilla regeneration maneuver. The pedicles were created in the lingual flap and passively rotated into the interimplant space., A simple interrupted suture was used to secure the abbreviated buccal flap mesial and distal to the emerging first molar implant and a horizontal mattress suture was used to secure the lingual pedicles in the inter-implant space without embarrassing their circulation. Note the 6.0-mm margin of apicocoronal keratinized tissue present on the buccal flap adjacent to the second molar implant. D, esective contouring was performed at the second molar site with a 15c blade, and a simple interrupted suture was used to secure the flap distal to the second molar implant. E, Three-year follow-up clinical photograph demonstrating a stable and self-cleansing peri-implant soft tissues environment as a result of appropriate flap design and use of surgical maneuvers to create scalloped soft tissue contours that resist collection off ood debris. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg 2007.

15 ATIE IN PESS ANTHNY G. SKA 15 FIGUE 12. Use of minimally invasive tunnel dissection to provide access for repair an osseous fenestration defect occurring unexpectedly during s implant placement.a, cclusal view of s placement o mplant (Prevail; 3i Biomet, Palm Beach Gardens, F) after use of a rotary tissue punch and a series of twist and e drills. Unexpectedly, a fenestration defect was detected by palpation over the apical aspect of the surgical site. B and, A full-thickness vertical incision was performed 5.0 mm mesial to the fenestration defect and a subperiosteal tunnel was made 5.0 mm distal to the defect. Grafting was accomplished through this minimally invasive approach using autogenous bone and porous bone mineral (Bio-ss; steohealth, Shirley, NY). The resorbable barrier membrane (ssix Plus; 3i Biomet) shown in this photograph was introduced into the tunnel and stabilized by absorbing blood at the site with light pressure held over the graft site for 10 minutes. Interrupted sutures were then used for closure. D, Postoperative periapical radiograph demonstrates ideal implant positions as per surgical guide. Seating of abutments through the tissue punch access is facilitated by the integrated platform-switching feature of the implants used in this case (Prevail; 3i Biomet). E, Postoperative cone beam T cross-sectional image (I-at Vision Software; Imaging Sciences International,, PA) of the grafted defect indicating successful augmentation of the defect and surrounding thin buccal plate visualized through the subperiosteal tunnel. Anthony G. Sklar. Guidelines for Flapless Surgery. J ral Maxillofac Surg IT-71-98

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