Orthopaedic drill guide prototype validation

Cemented total hip arthroplasty (THA) demonstrates superior survival rates compared to uncemented procedures. Nevertheless, most younger patients opt for uncemented THA, as removing well-fixed bone cement in the femur during revisions is complex, particularly the distal cement plug. This removal procedure often increases the risk of femoral fracture or perforation, haemorrhage and weakening bone due to poor drill control and positioning. Aim of this study was to design a novel drill guide to improve drill positioning. A novel orthopaedic drill guide was developed, featuring a compliant centralizer activated by a drill guide actuator. Bone models were prepared to assess centralizing performance. Three conditions were tested: drilling without guidance, guided drilling with centralizer activation held, and guided drilling with centralizer activation released. Deviations from the bone centre were measured at the entry and exit point of the drill. In the centralizing performance test, the drill guide significantly reduced drill hole deviations in both entry and exit points compared to the control (p骨水泥型全髋关节置换术（Cemented total hip arthroplasty, THA）相较于非骨水泥型手术，具有更优异的生存率。然而，多数年轻患者仍选择非骨水泥型THA，原因在于翻修术中取出股骨内固定牢固的骨水泥操作复杂，尤以远端骨水泥栓为甚。此类取出操作常因钻孔控制与定位不佳，增加股骨骨折或穿孔、出血以及骨强度下降的风险。本研究旨在设计一款新型钻孔导向器以优化钻孔定位。本研究研发了一款新型骨科钻孔导向器，其搭载由钻孔导向器致动器驱动的柔性对中器。研究制备了骨模型以评估该装置的对中性能，共设置三种测试条件：无导向钻孔、保持对中器激活状态的导向钻孔，以及解除对中器激活状态的导向钻孔。分别测量钻孔入口点与出口点处偏离骨中心的偏差值。在对中性能测试中，相较于对照组，该钻孔导向器可显著降低钻孔入口与出口处的偏差（p