1/26. Periodontal and peri-implant bone regeneration: clinical and histologic observations.The principle of guided tissue regeneration by barrier membranes to restore lost periodontal tissue around natural teeth has also been used around osseointegrated implants in an attempt to restore alveolar ridge defects. While most periodontal procedures in the literature describe root coverage by mucogingival surgery, which achieves healing through soft tissue attachment, regeneration of denuded root surfaces is performed by guided tissue regeneration using expanded polytetrafluoroethylene barrier membranes and demineralized freeze-dried bone allografts as inductive/conductive materials. In this study the technique is applied in two partially exposed cylindrical hydroxyapatite-coated implants in extraction sites in one patient. Surgical reentry in both sites is presented, with histologic examination revealing new bone formation on the exposed root surface and the hydroxyapatite-coated implants.- - - - - - - - - - ranking = 1keywords = membrane (Clic here for more details about this article) |
2/26. Subgingival acellular dermal matrix allograft for the treatment of gingival recession: a case report.Root coverage procedures using subgingival soft tissue grafts or guided tissue regeneration have attracted much interest within the past 2 decades. Recently, acellular dermal matrix allograft (ADMA) has been introduced as a substitute for palatal donor tissue in gingival augmentation procedures. This study was undertaken to examine the potential of ADMA to be used as a substitute for autogenous connective tissue graft material in a root coverage procedure in a case with moderate gingival recession combined with reduced keratinized attached gingiva. After thorough root planing and conditioning of the root surface with a saturated solution of tetracycline-HCl, a trapezoidal mucoperiosteal flap was raised and the papillae were de-epithelialized. The exposed bone surrounding the exposed root surface was perforated with a No. 2 round drill, and the exposed root and surrounding bone were covered by ADMA. The allograft was stabilized by 5-0 vicryl sutures. The flap was coronally positioned to completely cover the ADMA. Healing was uneventful. Eight-month observations and measurements showed root coverage of more than 3.5 mm (>80%), a gingival margin that was harmonious with the neighboring teeth, and an increase of the zone of keratinized attached gingiva, from 1 to 3 mm. Within the limitations of these clinical observations, it is suggested that ADMA may be a possible substitute to free autogenous connective tissue grafts and/or bioabsorbable barrier membranes. Further clinical and histological studies are necessary to understand the healing process of this surgical wound.- - - - - - - - - - ranking = 0.5keywords = membrane (Clic here for more details about this article) |
3/26. Successful root coverage: a human histologic evaluation of a case.connective tissue grafts combined with pedicle grafts (subepithelial grafts) have been shown to be effective in obtaining root coverage. Unfortunately, little is known about the histology of the results in humans. This is a case report of a tooth with a recession defect that was treated with a subepithelial graft. Complete root coverage was obtained. However, at 5 months postoperative the tooth had to be extracted because of a vertical root fracture. With the patient's permission, a small collar of tissue was removed with the tooth. The sample was processed and evaluated histologically. The results revealed areas of regeneration, with new bone, cementum, and connective tissue attachment coronal to the original gingival margin. No bone grafts or guided tissue regeneration membranes were used. This case report confirms that regeneration is possible with subepithelial grafts.- - - - - - - - - - ranking = 0.5keywords = membrane (Clic here for more details about this article) |
4/26. gingival recession treatment using a bilayer collagen membrane.Traditional periodontal plastic surgery techniques for the management of gingival recession have typically used soft tissue grafts to obtain defect coverage with great clinical success. Clinicians using guided tissue regeneration (GTR) techniques are also enjoying significant success in periodontal plastic surgery procedures. GTR therapy utilizing bioabsorbable membranes offers the advantages of preventing a donor site surgery and a second surgical procedure for barrier removal. A new bioabsorbable bilayer collagen membrane that readily adapts to bone and tooth surfaces by a gel formation of collagen fibers and blood may be stabilized without sutures prior to soft tissue closure. This bioabsorbable membrane has been shown to be effective in guided bone regeneration procedures and in treating periodontal defects. This case demonstrates the treatment of gingival recession with a novel collagen bilayer membrane.- - - - - - - - - - ranking = 4keywords = membrane (Clic here for more details about this article) |
5/26. Periodontal healing in humans using anorganic bovine bone and bovine peritoneum-derived collagen membrane: a clinical and histologic case report.The authors report the clinical and histologic data on the healing of a severe periodontal lesion obtained in a one-walled intrabony defect using anorganic bovine bone under a bovine peritoneum-derived collagen membrane. Eight months after surgery, a bone-like tissue replaced the lost tissues. A biopsy of this tissue was carried out. In the part of the specimen closer to the residual bony wall of the original defect, anorganic bone particles (ABP) appeared to be surrounded by a layer of newly formed bone; its osteocyte lacunae were colonized by osteocytes from the host, and actively secreting osteoblasts were observed in many microscopic fields. No resorption phenomena were observed in the ABP Newly formed cementum with actively secreting cementoblasts was present on the tooth surface, and well-oriented fibers inserting in both newly formed cementum and bone were observed. In an area far from residual bone, all ABP did not appear to be surrounded by newly formed bone. Osteocytic lacunae appeared not to be colonized by cells, and ABP was surrounded by dense connective tissue without osteoblasts near the grafted particles. A very limited amount of newly formed bone, without relations with ABP, was observed close to the root surface. From a clinical point of view, anorganic bone in association with a collagen membrane can be effective in the treatment of bony defects characterized by an unfavorable architecture. From a histologic point of view, the clinical appearance of bone regeneration is not always confirmed in the part of the defect far from the bony walls.- - - - - - - - - - ranking = 3keywords = membrane (Clic here for more details about this article) |
6/26. A bioresorbable barrier in the treatment of gingival recession: description of a new resorbable dome device.The biologic principle of guided tissue regeneration has been expanded to mucogingival surgery, using resorbable barrier membranes for the treatment of gingival recessions. Space provision is one of the main problems in non-space making defects, considering the softness of resorbable membranes. In this study, we tested the possibility to create and maintain a secluded space using a slow, long-lasting resorbable suture so that a resorbable dome device could support the barrier and immediately become a space-making device. Ten purely mucogingival recessions in ten patients were treated. At 12 months, the results were evaluated. In five subjects the gingival margin was within 1 mm of the cementoenamel junction, in four patients it was within 2 mm, and in one case a residual gingival recession was present (where the membrane became exposed). The mean root coverage obtained was 70.4%, while the mean gain of clinical attachment was 3.3 mm.- - - - - - - - - - ranking = 1.5keywords = membrane (Clic here for more details about this article) |
7/26. Treatment of gingival recession with collagen membranes.Periodontal plastic surgical techniques to obtain root coverage traditionally have utilized autogenous soft tissue grafts. guided tissue regeneration (GTR) increasingly is being used as an alternative to soft tissue grafting in attempting root coverage. Resorbable membranes in GTR therapy prevent the need for a second surgery to harvest donor tissue. GTR membranes composed of collagen are effective barriers that add to the thickness of the overlying gingiva and possess platelet-aggregating properties that may help in early wound healing. The cases presented here demonstrate the treatment of gingival recession with a resorbable collagen membrane.- - - - - - - - - - ranking = 3.5keywords = membrane (Clic here for more details about this article) |
8/26. Treatment of furcation defects with an allograft-alloplast-tetracycline composite bone graft combined with GTR: human histologic evaluation of a case report.The purpose of this study was to histologically evaluate furcation defects in humans treated with an allograft-alloplast-tetracycline composite graft combined with an absorbable membrane for guided tissue regeneration (GTR). Three teeth with Class II furcation involvement on the buccal aspects were included in this study. A notch was placed in calculus during the procedure to serve as a reference point for histologic evaluation. The defects were then treated with an allograft-alloplast-tetracycline composite graft combined with an absorbable membrane for GTR. At 6 months postoperative, the teeth were extracted with conservative block sections and processed for histologic evaluation. Regeneration (new bone, cementum, and connective tissue attachment) coronal to a notch could be seen in one of the three defects treated. In the other two defects, a new connective tissue attachment was demonstrated (new connective tissue attachment into new cementum) in the notch placed in calculus. In this study, regeneration of a furcation defect in a human was documented with histology.- - - - - - - - - - ranking = 1keywords = membrane (Clic here for more details about this article) |
9/26. guided tissue regeneration-based root coverage utilizing collagen membranes: technique and case reports.gingival recession defects have traditionally been treated with various grafting procedures. Recently, guided tissue regeneration with collagen membranes has shown promising results. This article reviews the rationale, indications, contraindications, and clinical methods for the use of bioabsorbable collagen membrane barriers. Several properties make collagen membranes attractive candidates for use as barriers in guided tissue regeneration-based root coverage procedures. These include the inhibition of epithelial migration and promotion of new connective tissue attachment; the ability to aggregate platelets, thereby facilitating wound stabilization and maturation; the promotion of cellular migration and wound closure; the elimination of the need for reentry surgery; and the ability to augment tissue thickness. Cases are presented to illustrate the surgical principles and techniques.- - - - - - - - - - ranking = 3.5keywords = membrane (Clic here for more details about this article) |
10/26. Simultaneous treatment of multiple, bilateral, deep buccal recession defects with bioabsorbable barrier membranes: a case report.Gingival recessions are of concern both esthetically and functionally for the dental patient. Bioabsorbable barriers were used to simultaneously treat six mucogingival recessions affecting six teeth in both maxillary quadrants of a 34-year-old woman. Root exposures ranging from 4 to 6 mm were successfully treated; complete root coverage was obtained at all treated sites. Follow-up visits up to 18 months revealed the stability of the clinical outcome, confirming the efficacy of the procedure.- - - - - - - - - - ranking = 2keywords = membrane (Clic here for more details about this article) |
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