Department of Periodontology, Faculty of Medicine, Catholic University Leuven, Leuven, Belgium.
J Clin Periodontol. 2010 Apr;37(4):398-403. doi: 10.1111/j.1600-051X.2010.01535.x.
To assess the accuracy of implants placed flapless by a stereolithographic template in partially edentulous patients.
Eight patients, requiring two to four implants (maxilla or mandible), were consecutively recruited. Radiographical data were obtained by means of a cone beam or a multi-slice CT scan and imported in a software program. Implants (n=21) were planned in a virtual environment, leading to the manufacture of one stereolithographic template per patient to guide the implant placement in a one-stage flapless procedure. A postoperative cone beam CT was performed to calculate the difference between virtual implant (n=21) positions in the preoperative planning and postoperative situation.
A mean angular deviation of 2.7 degrees (range 0.4-8, SD 1.9), with a mean deviation at the apex of 1.0 mm (range 0.2-3.0, SD 0.7), was observed. If one patient, a dropout because of non-conformity with the protocol, was excluded, the angular deviation was reduced to 2.2 degrees (range 0.6-3.9, SD 1.1), and the apical deviation to 0.9 mm (range 0.2-1.8).
Based on this limited patient population, a flapless implant installation appears to be a useful procedure even when based on accurate and reliable 3D CT-based image data and a dedicated implant planning software.
评估无瓣模板引导下在部分缺牙患者中放置种植体的准确性。
连续招募了 8 名需要 2 至 4 颗种植体（上颌或下颌）的患者。通过锥形束或多层 CT 扫描获得影像学数据，并将其导入软件程序。在虚拟环境中规划种植体（n=21），为每位患者制造一个立体光刻模板，以指导无瓣一期手术中的种植体放置。术后进行锥形束 CT 检查，以计算术前规划中虚拟种植体（n=21）位置与术后情况之间的差异。
观察到平均角度偏差为 2.7 度（范围 0.4-8，SD 1.9），根尖平均偏差为 1.0 毫米（范围 0.2-3.0，SD 0.7）。如果排除一名因不符合方案而退出的患者，角度偏差减小至 2.2 度（范围 0.6-3.9，SD 1.1），根尖偏差减小至 0.9 毫米（范围 0.2-1.8）。
基于这一小部分患者人群，即使基于准确可靠的 3D CT 图像数据和专用的种植体规划软件，无瓣种植体安装似乎也是一种有用的方法。
