Chen Chang-Kai, Yuh Da-Yo, Huang Ren-Yeong, Fu Earl, Tsai Cheng-Feng, Chiang Cheng-Yang
Int J Oral Maxillofac Implants. 2018 Nov/Dec;33(6):1213-1218. doi: 10.11607/jomi.6585.
Computer-aided surgery under navigation system guidance is widely applied in dental implant procedures. However, the accuracy of drilling with such navigation systems has not been comparatively evaluated alongside those of laboratory guide-based and freehand drilling. Therefore, this study aimed to compare the accuracies of these three drilling systems.
A navigation system, a laboratory guide, and freehand drilling were used to drill 150 holes on 30 cast models. Two master models-one each for the maxilla and mandible-were prepared with the idea of placing five implants per cast. After drilling five holes on each cast, postoperative cone beam computed tomography images were acquired to measure the magnitude of errors.
The navigation system and laboratory guide were more accurate than freehand placement with respect to total errors at the entry and apex, lateral error at the apex, and angular error. The navigation system was more accurate than the laboratory guide with respect to angular error. Laboratory guide-based drilling was more accurate than freehand drilling in terms of lateral error at entry.
In comparison with the laboratory guide and freehand placement, the navigation system exhibited lower angular and axial errors. Despite its higher accuracy, the navigation system requires the operator to pay greater attention.
导航系统引导下的计算机辅助手术在牙种植手术中得到广泛应用。然而，此类导航系统钻孔的准确性尚未与基于实验室导板钻孔和徒手钻孔的准确性进行比较评估。因此，本研究旨在比较这三种钻孔系统的准确性。
使用导航系统、实验室导板和徒手钻孔在30个铸模上钻150个孔。制备了两个主模型，上颌和下颌各一个，每个铸模植入五颗种植体。在每个铸模上钻五个孔后，获取术后锥形束计算机断层扫描图像以测量误差大小。
在入口和根尖处的总误差、根尖处的侧向误差和角度误差方面，导航系统和实验室导板比徒手植入更准确。在角度误差方面，导航系统比实验室导板更准确。在入口处的侧向误差方面，基于实验室导板的钻孔比徒手钻孔更准确。
与实验室导板和徒手植入相比，导航系统的角度和轴向误差更低。尽管导航系统准确性更高，但需要操作者更加注意。
