Oral and Maxillo-Facial Surgery Unit, Department of Dental Sciences, University of Bologna, Italy.
Clin Implant Dent Relat Res. 2012 May;14 Suppl 1:e67-82. doi: 10.1111/j.1708-8208.2011.00360.x. Epub 2011 Jul 11.
The aims of this study were to evaluate a surgical/prosthetic protocol for the immediate rehabilitation of the augmented edentulous maxilla, and to compare the outcomes of implants placed in grafted (test group) versus native (control group) sites in the same patients.
Twenty patients were included in the study. Each patient was treated with a bilateral sinus augmentation procedure using a 50:50 composite graft of autogenous mandibular bone and bovine hydroxyapatite. Four to 5 months later, 155 implants (90 test and 65 control) were placed and restored with screw-retained fixed definitive prostheses supported by titanium frameworks within 1 week. All patients were followed for 1 year. Implant stability quotient (ISQ) measurements and radiographic evaluation of the marginal bone resorption (MBR) were performed.
Two test implants failed in two patients, giving a cumulative 1-year success rate of 98.7%; the prostheses success rate was 100%. Insertion torque and ISQ values for test implants were significantly lower than those for control implants (unpaired t-test, p < .0001). The mean MBR around control and test implants at the 1-year evaluation were similar (0.47 ± 0.25 mm and 0.43 ± 0.21 mm, respectively).
The combination of implants placed in sinus-grafted and native sites can be immediately loaded with a fixed full-arch prosthesis and yield short-term successful outcomes.
本研究旨在评估一种用于即刻修复上颌骨种植体的手术/修复方案，并比较同种患者中植入于骨移植（试验组）和非骨移植（对照组）部位的种植体的结果。
本研究共纳入 20 名患者。每位患者均接受双侧窦提升术，采用自体下颌骨和牛羟磷灰石 50:50 复合移植物。4 至 5 个月后，在同一周内，将 155 个种植体（90 个试验组和 65 个对照组）植入并采用螺丝固位固定修复体修复，由钛框架支撑。所有患者均随访 1 年。进行种植体稳定性测量（ISQ）和边缘骨吸收（MBR）的放射学评估。
两名患者的两个试验种植体失败，1 年累计成功率为 98.7%；修复体成功率为 100%。试验组种植体的插入扭矩和 ISQ 值明显低于对照组（配对 t 检验，p <.0001）。在 1 年评估时，对照组和试验组种植体周围的平均 MBR 相似（分别为 0.47 ± 0.25mm 和 0.43 ± 0.21mm）。
将植入于窦内骨移植和非骨移植部位的种植体联合即刻加载固定全牙弓修复体，可获得短期成功结果。
