Department for Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany.
Clin Oral Implants Res. 2009 Nov;20(11):1191-9. doi: 10.1111/j.1600-0501.2009.01764.x. Epub 2009 Jul 20.
To evaluate the accuracy of the first integrated system for cone-beam CT (CBCT) imaging, dental implant planning and surgical template-aided implant placement.
On the basis of CBCT scans, a total of 54 implant positions were planned for 10 partially edentulous anatomical patient-equivalent models. Surgical guides were ordered from the manufacturer (SICAT). Two different types of guidance were assessed: for assessment of the SICAT system inherent accuracy vendor's titanium sleeves of 2 mm internal diameter and 5 mm length were utilized for pilot drills. The guide sleeves of the NobelGuide system were implemented for fully guided surgery and implant insertion. Deviations perpendicular to the implant axes at the crestal and apical end, as well as the angle deviations between the virtual planning data and the surgical results, were measured utilizing a follow-up CBCT investigation and referential marker-based registration.
The SICAT system inherent mean deviation rates for the drilled pilot osteotomies were determined to be smaller than 500 mum even at the apical end. Mean angle deviations of 1.18 degrees were determined. Utilizing the NobelGuide sleeve-in-sleeve system for fully guided implant insertion in combination with the investigated template technology enabled to insert dental implants with the same accuracy. Crestal deviations, in general, were significantly lower than the apical deviations.
Although hardly comparable due to different study designs and measurement strategies, the investigated SICAT system's inherent accuracy corresponds to the most favourable results for computer-aided surgery systems published so far. In combination with the NobelGuide surgical set for fully guided insertion, the same accuracy level could be maintained for implant positioning.
评估首个集成锥形束 CT（CBCT）成像、牙种植体规划和手术模板辅助种植体放置的系统的准确性。
基于 CBCT 扫描，为 10 个部分无牙解剖患者等效模型中的总共 54 个种植体位置进行了规划。手术导板由制造商（SICAT）订购。评估了两种不同类型的引导：为了评估 SICAT 系统固有的准确性，使用了 2 毫米内径和 5 毫米长的供应商钛制套管作为导向钻。使用 NobelGuide 系统的导套进行全向引导手术和植入物插入。使用后续 CBCT 研究和基于参考标记的配准，测量了垂直于种植体轴在嵴顶和根尖末端的偏差以及虚拟规划数据与手术结果之间的角度偏差。
即使在根尖末端，SICAT 系统固有钻孔导孔的平均偏差率也确定为小于 500 微米。确定的平均角度偏差为 1.18 度。使用 NobelGuide 套管内套管系统进行全向植入物插入，并结合所研究的模板技术，能够以相同的精度插入牙种植体。总的来说，嵴顶偏差明显低于根尖偏差。
尽管由于不同的研究设计和测量策略，几乎无法进行比较，但所研究的 SICAT 系统的固有准确性与迄今为止发表的计算机辅助手术系统的最佳结果相对应。与 NobelGuide 用于全向插入的外科套件结合使用，可以保持相同的植入物定位精度。
