Minns R J
Regional Medical Physics Department, Dryburn Hospital, Durham, Great Britain.
Arch Orthop Trauma Surg. 1989;108(4):231-5. doi: 10.1007/BF00936206.
The Minns knee prosthesis has been designed so that the ligaments, soft tissues and musculature about the knee can return to their full functioning during the movement and loading that occur in usage. By utilising a third component made of polyethylene that slides back and forth in a straight line between the metallic femoral and tibial components, the knee is able to roll and slide at the plastic/metal junctions without creating high forces and loosening moments on the tibial component. The tibial tray has a central cut-out to allow the functioning of both cruciate ligaments, and the femoral component is of the total condylar design. Experimental and theoretical studies on the functioning and clinical performance of this design and the biomechanical implications of the technique of surgical implantation are described. The results of the first 165 cases, followed up for a maximum of 5 years, were ranked according to pain, mobility, and restoration of function; 75% were rated as excellent, both subjectively and objectively, 13% as good, and 9% as fair. The average range of motion measured at least 6 months postoperatively was 103 degrees. Eight knees dislocated laterally because of instability and were successfully revised using the sliding plateau without being necessary to remove the metallic components. Minimal wear has been seen on the removed menisci up to 4.5 years' use.
明斯膝关节假体的设计目的是，使膝关节周围的韧带、软组织和肌肉组织在使用过程中的运动和负荷期间能够恢复其全部功能。通过使用由聚乙烯制成的第三部件，该部件在金属股骨部件和胫骨部件之间沿直线来回滑动，膝关节能够在塑料/金属接合处滚动和滑动，而不会在胫骨部件上产生高应力和松动力矩。胫骨托有一个中央切口，以允许两条交叉韧带发挥功能，股骨部件采用全髁设计。描述了对该设计的功能和临床性能以及手术植入技术的生物力学影响的实验和理论研究。对最初165例患者进行了随访，最长随访5年，根据疼痛、活动度和功能恢复情况进行评分；75%的患者主观和客观评分均为优秀，13%为良好，9%为中等。术后至少6个月测量的平均活动范围为103度。8个膝关节因不稳定而向外脱位，使用滑动平台成功进行了翻修，无需移除金属部件。在使用长达4.5年的取出半月板上观察到最小磨损。
