Park S H, Hwang D S, Yoon Y S
Department of Mechanical Engineering, KAIST, 355 Gwahak-ro, Yuseong-gu, Daejeon 305-701, South Korea.
Rev Sci Instrum. 2013 Jul;84(7):075104. doi: 10.1063/1.4812330.
Femoroacetabular impingement stems from an abnormal shape of the acetabulum and proximal femur. It is treated by resection of damaged soft tissue and by the shaping of bone to resemble normal features. The arthroscopic treatment of femoroacetabular impingement has many advantages, including minimal incisions, rapid recovery, and less pain. However, in some cases, revision is needed owing to the insufficient resection of damaged bone from a misreading of the surgical site. The limited view of arthroscopy is the major reason for the complications. In this research, a navigation method for the arthroscopic treatment of femoroacetabular impingement is developed. The proposed navigation system consists of femur attachable measurement device and user interface. The bone mounted measurement devices measure points on head-neck junction for registration and position of surgical instrument. User interface shows the three-dimensional model of patient's femur and surgical instrument position that is tracked by measurement device. Surgeon can know the three-dimensional anatomical structure of hip joint and surgical instrument position on surgical site using navigation system. Surface registration was used to obtain relation between patient's coordinate at the surgical site and coordinate of three-dimensional model of femur. In this research, we evaluated the proposed navigation system using plastic model bone. It is expected that the surgical tool tracking position accuracy will be less than 1 mm.
股骨髋臼撞击症源于髋臼和股骨近端的异常形态。其治疗方法包括切除受损软组织以及对骨骼进行塑形以使其接近正常形态。股骨髋臼撞击症的关节镜治疗具有诸多优点，包括切口极小、恢复快以及疼痛较轻。然而，在某些情况下，由于对手术部位的误判导致受损骨骼切除不充分，需要进行翻修。关节镜视野有限是导致并发症的主要原因。在本研究中，开发了一种用于股骨髋臼撞击症关节镜治疗的导航方法。所提出的导航系统由可附着于股骨的测量装置和用户界面组成。安装在骨骼上的测量装置测量头颈交界处的点，用于手术器械的注册和定位。用户界面显示患者股骨的三维模型以及由测量装置跟踪的手术器械位置。外科医生可以使用导航系统了解髋关节的三维解剖结构以及手术部位的手术器械位置。使用表面注册来获取手术部位患者坐标系与股骨三维模型坐标系之间的关系。在本研究中，我们使用塑料模型骨对所提出的导航系统进行了评估。预计手术工具跟踪位置精度将小于1毫米。
