Maxillary sinus floor augmentation using two different ratios of cancellous and cortical freeze-dried bone allograft mixtures: clinical and histological outcomes
양건일, 지충섭, 조옥현, Yun Ho-Jin, 이원표, 김병옥, 유상준,
소속 상세정보
양건일 ( Yang Keon-Il ) - Chosun University School of Dentistry Department of Periodontology
지충섭 ( Ji Choong-Seop ) - Chosun University School of Dentistry Department of Periodontology
조옥현 ( Cho Ock-Hyun ) - Chosun University School of Dentistry Department of Periodontology
( Yun Ho-Jin ) - Chosun University School of Dentistry Department of Periodontology
이원표 ( Lee Won-Pyo ) - Chosun University School of Dentistry Department of Periodontology
김병옥 ( Kim Byung-Ock ) - Chosun University School of Dentistry Department of Periodontology
유상준 ( Yu Sang-Joun ) - Chosun University School of Dentistry Department of Periodontology
Abstract
The aim of this study was to evaluate the clinical and histologic outcomes of sinus floor augmentation using mixtures of cancellous and cortical freeze-dried bone allograft (AG) at two different ratios (5:5 and 3:7). The sinuses of 21 patients were grafted with the two types of mixed allografts. Cone-beam computerized tomography scans were obtained, and the radiographic parameters measured were residual bone height and bone gain after bone healing. Clinical examinations and histologic analyses were performed 6 months after the grafting procedure. Twenty implant sites in the 5:5 mixed AG group and 22 implant sites in the 3:7 mixed AG group were analyzed. The bone gain after bone healing was 13.0±3.1 mm in the 5:5 group and 14.5±3.5 mm in the 3:7 group. The survival rates of the implants in both groups were 100% during follow-up periods. The newly formed bone was 29.9±16.6% in the 5:5 AG group and 25.1±10.1% in the 3:7 AG group. Moreover, the percentage of residual graft material was 15.2±12.7% in the 5:5 AG group and 20.4±12.1% in the 3:7 AG group. The connective tissues were 55.0±14.0% and 54.6±10.0% in the 5:5 and 3:7 AG groups, respectively. The two different ratios of AG presented with different histological outcomes after bone healing. Additionally, adequate new bone formation for the placement of implants was achieved following maxillary sinus augmentation using both types of AG.
키워드
Allograft; Bone regeneration; Bone substitutes; Clinical trial; Sinus floor augmentation
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