1/25. Localized ridge maintenance using bone membrane.The immediate placement of a dental implant into a fresh extraction socket has been limited in many instances by the quantity of bone that remains after the extraction. This article presents two clinical cases that demonstrate successful regeneration of alveolar ridges in which there was extensive loss of the buccal plate of bone. This lack of alveolar process impeded the immediate placement of dental implants into fresh extraction sockets. The surgical technique performed in these cases was based on the principles of guided bone regeneration using a demineralized freeze-dried bone membrane. The bone membrane acted as an efficient barrier that excluded the nonosteogenic tissues. Bone formation took place for the placement of endosseous dental implants 8 months after the procedures were initiated. These human clinical cases confirm positive results of previous animal findings.- - - - - - - - - - ranking = 1keywords = plate (Clic here for more details about this article) |
2/25. Treatment of a large periapical lesion with loss of labial cortical plate using GTR: a case report.Following endodontic treatment, a large periapical lesion (9.0 mm x 9.0 mm) at a maxillary central incisor was treated with demineralized freeze-dried bone allograft (DFDBA) using the principles of guided tissue regeneration. The physical barrier was removed 6 months postsurgical. The cortical alveolar plate was observed to be completely reconstructed. Histologic evaluation demonstrated lamellar bone surrounding DFDBA particles. Radiographic follow-up 1 year posttreatment demonstrated complete resolution of the periapical radiolucency.- - - - - - - - - - ranking = 5keywords = plate (Clic here for more details about this article) |
3/25. Etiology and management of mandibular fractures associated with endosteal implants in the atrophic mandible.mandibular fractures can occur with the insertion of endosseous implants. Four patients whose mandibles were fractured with the removal or insertion of mandibular endosseous implants are described. Three of the patients required an autogenous bone graft to repair the fracture, and 1 patient was managed with a reconstruction plate. Strategies for prevention and treatment of this uncommon complication are discussed.- - - - - - - - - - ranking = 1keywords = plate (Clic here for more details about this article) |
4/25. microbiology of subgingival plaque from children with localized prepubertal periodontitis.Localized prepubertal periodontitis has been described as a host-defect mediated form of bacterially induced periodontitis, with an early onset and rapid progression around a few teeth in children prior to puberty. To further our understanding of the etiology of this disease, we have examined the microbiological components of subgingival dental plaque in 9 children with localized prepubertal periodontitis to determine if patterns of putative pathogens existed, and have compared these results with those obtained from 4 children with no periodontitis. Subgingival plaque samples were plated onto a selective medium for actinobacillus actinomycetemcomitans and onto a non-selective medium for anaerobes, and the predominant cultivable microbiota of 2 sites per child was determined. The subgingival microbiota of children with localized prepubertal periodontitis clearly differs from non-diseased children in the detection of high levels of several suspected pathogens, including A. actinomycetemcomitans, bacteroides intermedius, eikenella corrodens, and capnocytophaga sputigena. These putative pathogens were found in various combinations. These findings suggest that localized prepubertal periodontitis is associated with specific subgingival bacteria which are generally not found in children without periodontitis.- - - - - - - - - - ranking = 1keywords = plate (Clic here for more details about this article) |
5/25. Coronal ridge augmentation in the absence of bilateral bony plates around a pathologically denuded implant surface.Guided bone regeneration via an osteopromotive barrier is indicated in different alveolar bone deficiencies and in periimplant bone destruction around pathologically denuded exposed implants. Regeneration of the osseous volume is determined by understanding the biologic behavior response of hard and soft tissues in guided tissue regeneration procedures. Consequently, a meticulous surgical approach is mandatory to preserve wound healing cascades and tissue stability. However, hard tissue augmentation in the nonsupported coronal direction has been unpredictable. A case report is presented in which a severely defected ridge around a pathologically exposed functional implant combined with a destructive extraction site was restored and regenerated. Bovine bone mineral particles (Bio-Oss) served as the graft material and were followed by an expanded polytetrafluoroethylene (e-PTFE) occlusive membrane as a bilateral regenerative tissue guide. Subsequently, 2 additional implants were placed in the augmented hard tissue ridge.- - - - - - - - - - ranking = 4keywords = plate (Clic here for more details about this article) |
6/25. The use of autologous growth factors in periodontal surgical therapy: platelet gel biotechnology--case reports.The role of polypeptide growth factors in periodontal regeneration has been documented through animal and human studies. Human platelets contain platelet-derived growth factor (PDGF) and transforming growth factor-beta (TGF-beta) in their alpha granules. PDGF has been shown to play a role in periodontal regeneration. It has been demonstrated that TGF-beta has a very potent effect on cells associated with bone. The case reports presented demonstrate a new biotechnology in which platelet gel is used in combination with demineralized freeze-dried bone allografts for the treatment of periodontal osseous defects. The treated teeth presented with severe bone loss and a guarded prognosis. Platelet gel biotechnology was used as a novel treatment modality. A significant reduction in probing depths was noted, and radiographically significant amounts of new bone were visible as early as 2 months postoperative. Results up to 2 years postoperative are presented.- - - - - - - - - - ranking = 7keywords = plate (Clic here for more details about this article) |
7/25. Using platelet-rich plasma to accelerate soft tissue maturation in esthetic periodontal surgery.The transposition of connective tissue to increase the zone of keratinized tissue and/or for root coverage has become an integral part of the surgical dental practice. In an effort to reduce the incidence of postoperative complications occasionally observed with these procedures, the incorporation of platelet-rich plasma and its growth factors has been introduced into the surgical protocol. documentation of several cases requiring esthetic soft tissue grafting procedures and the use of regenerative barriers to obtain root coverage with the incorporation of platelet-rich plasma is presented.- - - - - - - - - - ranking = 6keywords = plate (Clic here for more details about this article) |
8/25. Reconstruction of the anterior maxilla with platelet gel, autogenous bone, and titanium mesh: a case report.BACKGROUND: Reconstruction of defects in the anterior part of the maxilla to enable implant placement is a challenging treatment. Recent studies have suggested that the use of autogenous platelet gel may contribute to improved healing of bone grafts. PURPOSE: A case is presented in which particulated autogenous bone, platelet gel, and a titanium mesh were used for alveolar bone reconstruction of the anterior maxilla prior to implant placement. MATERIALS AND methods: Corticocancellous bone from the iliac crest was mixed with a preparation of autogenous platelet gel (platelet-rich plasma, thrombin, and calcium chloride) and placed against a titanium mesh fixed to the bone of the palate in a patient with severe resorption of the anterior maxilla. After 4.5 months of healing the mesh was removed and titanium implants were placed. A prolonged healing period of 8 months was allowed before healing abutments were placed and a fixed dental bridge was fabricated. RESULTS: Healing was uneventful, and the anterior maxilla had increased in height and width during the initial healing. All implants became integrated and have been supporting a fixed dental bridge for over 3 years with no dramatic dimensional changes of the graft. CONCLUSIONS: This case demonstrates that particulated autogenous bone and platelet gel may be used for reconstruction of the anterior maxilla. Autogenous growth factors in the gel possibly contributed to the positive outcome. Controlled clinical studies are needed to evaluate the effect of using platelet-rich plasma.- - - - - - - - - - ranking = 10keywords = plate (Clic here for more details about this article) |
9/25. Vertical alveolar distraction osteogenesis with complications in a reconstructed mandible.We report here a case of vertical alveolar distraction osteogenesis with many complications that required further surgical interventions. A 54-year-old man underwent mandibular resection followed by iliac bone grafting as the result of large mandibular odontogenic keratocyst. Eleven months later, alveolar vertical distraction osteogenesis was applied to the patient for prosthetic rehabilitation. Fracture of the basal bone occurred in the consolidation period, and the fracture was fixed by the titanium miniplate system. Radiographic examination after completion of distraction osteogenesis confirmed a radiolucent area in half of the distracted area between the basal bone and the transport segment, and when the distractor was removed the radiolucent area was filled with fibrous granulation tissue. The granulation tissue was removed and endosteal implants were inserted together with a bone graft. Ultimately, all implants were osseointegrated, and adequate esthetics and function of the implant-supported prosthesis were achieved.- - - - - - - - - - ranking = 1keywords = plate (Clic here for more details about this article) |
10/25. Platelet gel biotechnology applied to regenerative surgery of intrabony defects in patients with refractory generalized aggressive peridontitis. Case report.Platelet gel biotechnology, a method which has all the components of "tissue engineering" techniques, potentiates the already known healing process of guided tissue regeneration procedures (GTR) by multiplying the number of molecules that activate the healing response and by grafting in the host site various cell types, among which stem cells. Here are reported cases of patients affected by refractory generalized aggressive periodontitis treated with the association GTR and platelet gel biotechnology to verify if the contribution of the gel would produce superior results than those obtained by surgery alone which had been previously applied to the same sites with negative results. Three patients in therapy from 4 to 11 years, already subjected to surgery (GTR) and antibiotic therapy, were reoperated with the adjunct of autologous platelet gel. At a distance of 15.2 months (range 11-17 months) the operated sites showed a reduction in probing pocket depth of 3.4 mm (range 2.8-4.8 mm) and a gain in clinical attachment level of 3.1 mm (range 3-3.5 mm). The association of platelet gel biotechnology with GTR in the surgical treatment of intrabony defects of refractory generalized aggressive periodontitis patients seems to produce results similar to those reported for patients with chronic adult periodontitis. The observations at 15.2 months indicate that there is a stability over time of the results in those sites where previous surgical therapy had shown relapse.- - - - - - - - - - ranking = 3keywords = plate (Clic here for more details about this article) |
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