1/62. Tomodensitometric and histologic evaluation of the combined use of a collagen membrane and a hydroxyapatite spacer for guided bone regeneration: a clinical report.In this report, the problems of insufficient bone and soft tissue after extraction of maxillary incisors were addressed concurrently prior to endosseous implant placement, by combining the use of a diphenylphosphorylazide-cross-linked Type I collagen membrane and a resorbable space-making biomaterial composed of 200-micron porous hydroxyapatite granules blended in Type I collagen and chondroitin-4-sulfate. Upon flap reflection 8 months postsurgery, the horizontal deficiencies were almost completely resolved, membranes completely resorbed and the defects filled with hard, bonelike tissue, with a few superficial hydroxyapatite granules. Histologic evaluation of the bone biopsies obtained at the implantation sites revealed dense, well-reconstructed alveolar bone with a few traces of hydroxyapatite granules that had been completely resorbed. Tomodensitometric evaluation indicated that bone regeneration ranged from 14% to 58%, with an average bone gain of 29.77%. Four nonsubmerged ITI titanium implants placed in the augmented bone have been in function for more than 5 years, with no clinical or radiographic signs of hard or soft tissue breakdown. Bacterial sampling at dental sites with periodontitis 1 month prior to periodontal therapy and at implant sites for up to 30 months demonstrated rapid colonization of implant surfaces by periodontopathogens without causing any detrimental effect to implant integration.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
2/62. 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 = extraction (Clic here for more details about this article) |
3/62. bone regeneration around an osseointegrated implant. A simultaneous approach in a fenestrated defect: a case report.The use of a barrier membrane, with or without osseous allograft, has been shown to establish regeneration of osseous tissue around dental implants. Following three episodes of persistent symptomatic failed apicoectomy and subsequent tooth extraction, an osseointegrated implant was placed in a wide fenestrated defect. Demineralized freeze-dried bone allograft was covered by an occlusive expanded polytetrafluorethylene membrane. The reentry procedure revealed complete bone fill that followed the texture of the augmentation material beyond the previous buccal bony envelope.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
4/62. Orthodontic-prosthetic treatment to replace maxillary incisors exfoliated because of improper use of orthodontic elastics: a case report.This article describes the iatrogenic exfoliation of maxillary central incisors following the improper use of orthodontic elastic bands. The unsecured rubber band had migrated apically and caused an almost "bloodless extraction" of both maxillary central incisors. A combined orthodontic-prosthetic solution was used to replace the lost incisors.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
5/62. case reports offer a challenge to treatment strategies for immediate implants.The placement of osseointegrated implants in extraction sockets is a commonly used and reliable procedure. Many operative protocols have been suggested for use with both submerged and nonsubmerged implants, and some prerequisites have been defined for their successful placement. Dealing exclusively with implants placed in intact extraction sockets, this paper reviews these commonly suggested prerequisites, discusses their clinical relevance, and presents case reports in which clinical success was obtained despite the violation of more than 1 of these factors. Techniques to obtain primary implant stability, procedures to regenerate residual bone defects, the need to submerge implants in the healing phase, and treatment strategy in infected sites are reviewed. Because the simultaneous violation of some prerequisite factors allows postextractive implants to be performed with a single surgical approach, a new classification is proposed based on the number of surgical stages required to replace a failing tooth with an implant-supported restoration.- - - - - - - - - - ranking = 2keywords = extraction (Clic here for more details about this article) |
6/62. The use of tricalcium phosphate to preserve alveolar bone in a patient with ectodermal dysplasia: a case report.The prosthodontic management of the child with ectodermal dysplasia is made difficult because of the under-development of the alveolar ridges. This paper describes a case where tricalcium phosphate was placed in sockets immediately following the extraction of the primary incisor teeth to help maintain alveolar bone width, offering a valuable alternative treatment option in the prosthodontic management of the child patient with ectodermal dysplasia.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
7/62. 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 = 3keywords = extraction (Clic here for more details about this article) |
8/62. Aesthetic management of extractions for implant site development: delayed versus staged implant placement.Resorption of the dentoalveolar bone and collapse of the gingival ridge following tooth loss often results in aesthetic compromise and inadequate bone for "prosthetically driven" implant placement. Preventing alveolar bone resorption with a conservative procedure at the time of extraction can enhance aesthetics and reduce the duration and extent of treatment required for implant placement. This article describes the aesthetic management of extraction sites using a conservative bone grafting procedure at the time of extraction for implant site development. The case presented demonstrates staged and delayed implant placement techniques.- - - - - - - - - - ranking = 7keywords = extraction (Clic here for more details about this article) |
9/62. On predicting prognosis for single teeth. case reports.Two cases are presented where teeth initially deemed hopeless and scheduled for extraction were, at the patient's request, treated. The so-called hopeless teeth responded well to regenerative periodontal therapy. This supports findings of previous studies that only on healthy teeth can treatment outcome be predicted with confidence.- - - - - - - - - - ranking = 1keywords = extraction (Clic here for more details about this article) |
10/62. Orthodontic tooth movement after extraction of previously autotransplanted maxillary canines and ridge augmentation.A case report is detailed in which autotransplanted maxillary canines were removed and the spaces closed. Substantial surrounding bone loss was associated with the upper right canine, and a bone graft was needed to reestablish normal dentoalveolar ridge morphology. Bone was taken from the maxillary tuberosity and placed in the canine extraction site, fixed with a bone screw, and covered with GoreTex. Seven months after placement of the bone graft, the GoreTex and stabilizing screw were removed to allow for consolidation of the bone. The upper left canine and lower second premolars were extracted, and fixed appliances were placed in both arches to align the teeth and close the spaces. Protraction of the upper right first premolar and retraction of the lateral incisor into the graft site were kept slow and constant with continued periodontal assessment. During the space closure, there was some concern that the bone in the graft site might resorb, leaving the teeth with compromised periodontal support. However, no significant periodontal attachment loss occurred despite ongoing concern about the amount of keratinized tissue. Perhaps the relatively slow rate of tooth movement provided for bone to be maintained and recreated ahead of the tooth. Almost complete closure of the upper canine extraction spaces was achieved. The upper premolars were substituted for the maxillary canines, and unfavorable prosthetic options were thus avoided. The lower arch was aligned, and the extraction spaces completely closed.- - - - - - - - - - ranking = 7keywords = extraction (Clic here for more details about this article) |
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