Reissis N, Dendrinos G, Reissis E, Ring P A
Redhill General Hospital, Orthopedic Research Unit, Surrey, United Kingdom.
Arch Orthop Trauma Surg (1978). 1988;107(5):309-15. doi: 10.1007/BF00451512.
A prospective study of the Ring Total Knee Replacement is presented. The senior author (P.A. Ring) designed this prosthesis and began to apply it clinically in 1974. The Ring prosthesis is a resurfacing, unconstrained type of knee prosthesis and is designed for use without cement. It comprises two components, femoral and tibial, both made of titanium. A polyethylene liner is attached to the tibial component. The method was used for treatment of osteoarthritis and rheumatoid arthritis of the knee on 149 patients (178 knees) in the period from 1974 to 1985. Seventeen patients were lost to follow-up, leaving 132 patients (161 knees) for review. During the last review, 75.2% of the knees were pain free and 72% had full correction of the deformity. The average follow-up period was 5.1 years and the survival rate of the prosthesis during the same period was 94.4%. To evaluate the method we used computer analysis of preoperative and postoperative assessment cards with 153 observations. The result was excellent in 92 (57.2%) knees, good in 38 (23.6%) knees, and poor in 31 (19.2%) knees. Loosening of the components occurred in 3.7% knees, and the total revision rate was 5%. One knee was arthrodesed.
本文介绍了对Ring全膝关节置换术的前瞻性研究。资深作者（P.A. Ring）设计了这种假体，并于1974年开始在临床上应用。Ring假体是一种表面置换、无约束型膝关节假体，设计为非骨水泥型使用。它由两个部件组成，股骨部件和胫骨部件，均由钛制成。一个聚乙烯衬垫附着在胫骨部件上。该方法在1974年至1985年期间用于治疗149例患者（178个膝关节）的膝关节骨关节炎和类风湿性关节炎。17例患者失访，剩余132例患者（161个膝关节）接受复查。在最后一次复查时，75.2%的膝关节无疼痛，72%的膝关节畸形得到完全矫正。平均随访期为5.1年，同期假体生存率为94.4%。为评估该方法，我们对术前和术后评估卡进行了计算机分析，共153项观察。结果为92个（57.2%）膝关节优秀，38个（23.6%）膝关节良好，31个（19.2%）膝关节差。3.7%的膝关节出现部件松动，总翻修率为5%。1个膝关节进行了关节融合术。
