Abstract

In traditional orthognathic surgery, the dental splint technique is typically used to assist surgeons to reposition the maxilla or mandible. However, the design and manufacturing of dental splints is time-consuming and labor-intensive, and the templates may not applicable for some complicated cases due to the anatomic intricacies in the maxillofacial region. During recent years, computer-aided navigation technology has been widely used in oral and maxillofacial surgery. However, due to the limitation of current calibration and registration methods, it has been rarely reported for the motion tracking of intraoperative reposition for the loosed bone graft. In this study, a novel surgical navigation system was developed. With the use of this system, not only the surgical saw can be tracked in real-time, but also the loosed bone graft can be navigated under the guidance of the interactive 2D and 3D views until it is aligned with the preoperatively planned position. The phantom experiments validated the feasibility of our surgical navigation system, and the mean error of image-guided reposition was 1.03 ± 0.10 mm, which was significantly more accurate than the mean error of 5.57 ± 1.40 mm based on the non-navigated methods.

摘要

在传统的正颌手术中，牙科夹板技术通常用于协助外科医生重新定位上颌骨或下颌骨。然而，牙夹板的设计和制造费时费力，并且由于颌面部解剖结构复杂，模板可能不适用于一些复杂的病例。近年来，计算机辅助导航技术广泛应用于口腔颌面外科。然而，由于目前校准和配准方法的限制，用于松动骨移植术中复位的运动跟踪的报道很少。在这项研究中，开发了一种新型手术导航系统。通过使用该系统，不仅可以实时跟踪手术锯，而且松动的植骨可以在交互式 2D 和 3D 视图的指导下导航，直到它与术前计划的位置对齐。体模实验验证了我们手术导航系统的可行性，图像引导复位的平均误差为 1.03±0.10 mm，明显比基于非导航方法的平均误差 5.57±1.40 mm 更准确。