Department of Periodontology, UNESP - Univ. Estadual Paulista, Araraquara Dental School, Araraquara, Brazil.
Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.
Clin Oral Implants Res. 2019 Apr;30(4):315-323. doi: 10.1111/clr.13417. Epub 2019 Mar 18.
To evaluate the influence of the posterior residual bone height and sinus width on the outcome of maxillary sinus bone augmentation using anorganic bovine bone.
Bilateral sinus bone augmentation was performed using anorganic bovine bone in 20 patients with residual bone height <2 mm in at least one site on each side. Trephine samples were removed at the implant insertion site 8 months after the grafting procedure, and histological and histomorphometric analyses were performed to examine the relative amount (%) of new bone, anorganic bovine bone, and soft tissue in the grafted area. Based on cone beam computed tomography evaluation, the sites of implant insertion were classified according to sinus width into narrow, average, and wide, and according to residual bone height into ≤2 and >2 mm.
A total of 146 implants were installed and 103 biopsies were evaluated. New bone formation in sites classified as narrow (69 sites), average (19 sites), and wide (15 sites) was 28.5% ± 9.24, 28.9% ± 8.61, and 30.3% ± 7.80, respectively. The mean posterior maxillary residual bone height was 4.0 ± 2.43 mm, and 26 and 77 sites were classified as ≤2 and >2 mm, respectively. New bone formation was 26.2% ± 9.10 and 29.8% ± 8.67 for residual bone height ≤2 and >2 mm, respectively. The differences were non-significant.
Within the limitations of the present study, posterior residual bone height and sinus width were not factors with influence on new bone formation in sinuses grafted exclusively with anorganic bovine bone after 8 months of healing.
评估上颌窦骨增量中后剩余骨高度和窦宽度对无机牛骨植入效果的影响。
20 例患者每侧至少有 1 个部位的剩余骨高度<2mm，使用无机牛骨进行双侧窦骨增量。在移植后 8 个月，在植入部位取出环钻样本，并进行组织学和组织形态计量学分析，以检查移植区域中新骨、无机牛骨和软组织的相对量（%）。基于锥形束计算机断层扫描评估，根据窦宽度将植入部位分为狭窄、中等和宽，根据剩余骨高度分为≤2mm 和>2mm。
共植入 146 枚种植体，评估了 103 个活检样本。分类为狭窄（69 个部位）、中等（19 个部位）和宽（15 个部位）的部位新骨形成率分别为 28.5%±9.24、28.9%±8.61 和 30.3%±7.80。上颌窦后缘平均剩余骨高度为 4.0±2.43mm，分为≤2mm 和>2mm 的部位分别为 26 个和 77 个。剩余骨高度≤2mm 和>2mm 时新骨形成率分别为 26.2%±9.10 和 29.8%±8.67，差异无统计学意义。
在本研究的限制范围内，后剩余骨高度和窦宽度不是在上颌窦仅用无机牛骨移植 8 个月后影响新骨形成的因素。
