Vasak Christoph, Strbac Georg D, Huber Christian D, Lettner Stefan, Gahleitner André, Zechner Werner
Department of Oral Surgery, Bernhard Gottlieb University School of Dentistry, Medical University of Vienna, Vienna, Austria.
Clin Implant Dent Relat Res. 2015 Feb;17(1):142-9. doi: 10.1111/cid.12085. Epub 2013 May 16.
The study aims to evaluate the accuracy of the NobelGuide™ (Medicim/Nobel Biocare, Göteborg, Sweden) concept maximally reducing the influence of clinical and surgical parameters. Moreover, the study was to compare and validate two validation procedures versus a reference method.
Overall, 60 implants were placed in 10 artificial edentulous mandibles according to the NobelGuide™ protocol. For merging the pre- and postoperative DICOM data sets, three different fusion methods (Triple Scan Technique, NobelGuide™ Validation software, and AMIRA® software [VSG - Visualization Sciences Group, Burlington, MA, USA] as reference) were applied. Discrepancies between the virtual and the actual implant positions were measured.
The mean deviations measured with AMIRA® were 0.49 mm (implant shoulder), 0.69 mm (implant apex), and 1.98°mm (implant axis). The Triple Scan Technique as well as the NobelGuide™ Validation software revealed similar deviations compared with the reference method. A significant correlation between angular and apical deviations was seen (r = 0.53; p < .001). A greater implant diameter was associated with greater deviations (p = .03).
The Triple Scan Technique as a system-independent validation procedure as well as the NobelGuide™ Validation software are in accordance with the AMIRA® software. The NobelGuide™ system showed similar or less spatial and angular deviations compared with others.
本研究旨在评估NobelGuide™（瑞典哥德堡的Medicim/Nobel Biocare公司）理念在最大程度降低临床和手术参数影响方面的准确性。此外，本研究还比较并验证了两种验证程序与一种参考方法。
总体而言，根据NobelGuide™方案，在10个人造无牙下颌骨中植入60颗种植体。为了合并术前和术后的DICOM数据集，应用了三种不同的融合方法（三重扫描技术、NobelGuide™验证软件以及作为参考的AMIRA®软件[美国马萨诸塞州伯灵顿的可视化科学集团（VSG）]）。测量虚拟种植体位置与实际种植体位置之间的差异。
用AMIRA®测量的平均偏差为0.49毫米（种植体肩部）、0.69毫米（种植体根尖）和1.98°毫米（种植体轴）。与参考方法相比，三重扫描技术以及NobelGuide™验证软件显示出相似的偏差。在角度偏差和根尖偏差之间观察到显著相关性（r = 0.53；p <.001）。种植体直径越大，偏差越大（p = 0.03）。
作为一种独立于系统的验证程序的三重扫描技术以及NobelGuide™验证软件与AMIRA®软件一致。与其他系统相比，NobelGuide™系统显示出相似或更小的空间和角度偏差。
