Murray Peter M
Department of Orthopaedic Surgery, Mayo Clinic College of Medicine, 200 1st Street SW, Rochester, MN 55905, USA.
Hand Clin. 2006 May;22(2):201-6. doi: 10.1016/j.hcl.2006.02.005.
The first proximal interphalangeal joint (PIPJ) replacements were hinged devices allow-ing only single-axis motion. Newer implant arthroplasties of the PIPJ have anatomically designed proximal phalangeal and middle phalangeal components. Constrained devices have typically lead to failure at the hinge mechanism or the prosthetic bone interface. A need to create balanced forces across the joint was the rationale behind the semicon-strained PIPJ prosthesis, which uses an anatomic design. Limitations of the silicone PIPJ implant include its lack of resistance to valgus loading at the index and long digits during the pinch maneuver. It is generally believed that a PIPJ surface replacement arthro-plasty that preserves the collateral ligaments will achieve greater PIPJ stability.
第一代近端指间关节（PIPJ）置换物是仅允许单轴运动的铰链式装置。新型的PIPJ植入关节成形术具有符合解剖学设计的近节指骨和中节指骨组件。受限装置通常会导致铰链机制或假体骨界面处的失败。在半受限PIPJ假体背后的基本原理是需要在关节上产生平衡的力，该假体采用了解剖学设计。硅胶PIPJ植入物的局限性包括在捏取动作时，示指和长指缺乏抵抗外翻负荷的能力。人们普遍认为，保留侧副韧带的PIPJ表面置换关节成形术将实现更大的PIPJ稳定性。
