Department of Orthopedic Surgery, Kyoto University, Graduate School of Medicine, 54 Shogoin-Kawaharacho, Sakyo-ku, Kyoto, 606-8507, Japan,
Int Orthop. 2014 Apr;38(4):761-6. doi: 10.1007/s00264-013-2179-8. Epub 2013 Nov 28.
The purpose of this study was to examine the effect of deep flexion on the long-term durability of a high-flex ceramic implant in total knee arthroplasty.
Five hundred and five consecutive knees replaced with a Bi-Surface knee system (Kyocera Medical, Osaka, Japan) were divided into two groups according to the range of flexion by 135° postoperatively. Comparison of implant durability was made between the high- and low-flexion groups after a minimum ten year follow-up.
With revision for any surgery as the end point, the survival rates at ten years were 95.5% and 96.2% in the high- and low-flexion group, respectively (p = 0.63). With revision for mechanical failure as the end point, survival rates were 98.7% and 98.5%, respectively (p = 0.94).
Implant survival rate was similar for both groups. Deep flexion seemed not to affect long-term durability.
本研究旨在探讨全膝关节置换术中深度屈膝对高屈曲陶瓷植入物长期耐用性的影响。
将 505 例连续膝关节采用 Bi-Surface 膝关节系统（日本京瓷医疗）置换，根据术后 135°时的屈曲范围分为两组。在至少 10 年的随访后，比较高、低屈曲组的植入物耐用性。
以任何手术翻修为终点，高、低屈曲组 10 年的生存率分别为 95.5%和 96.2%（p=0.63）。以机械故障翻修为终点，生存率分别为 98.7%和 98.5%（p=0.94）。
两组的植入物存活率相似。深度屈膝似乎不会影响长期耐用性。
