骨移植による顎裂閉鎖部へのインプラント治療に関する臨床統計的検討

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  • Clinical Study on Dental Implant Treatment in Grafted Alveolar Clefts

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The purpose of this study was to evaluate the clinical application of endosseous implants placed into bone-grafted alveolar clefts. Seventy-nine implants inserted at cleft sites of 46 cleft lip and palate patients were studied. In 34 patients, implants were placed into the cleft sites without bone augmentation because the bone volume of osseous bridging was sufficient for implantation.However, it was necessary to regraft the alveolar cleft region in 13 patients to provide adequate bone volume for implant placement. The interval between initial bone grafting in alveolar clefts and implant placement was 17.4 months (range, 4-72 mo). Thirty-six hydroxyapatite-coated cylindrical implants were placed in 20 patients, 15 titanium screw implants with a machined surface were placed in 12 patients, and 28 titanium screw implants with a rough surface were placed in 14 patients. The length of the placed implants was mainly 13 mm or 15 mm. Soft tissue management around the implants was performed in 26 patients, and most of the management was vestibular extension, although 3 implants failed to establish osseointegration before the fitting of superstructures, and the remainder were stable. Thus, the overall survival rate was 96.2% at the end of the observation period. The results of this study suggest that endosseous implants can be successfully placed in bone-grafted alveolar clefts as into the non-cleft maxilla.

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