Department of Orthopaedics, Heidelberg University Hospital, Heidelberg.
Diakonie Klinikum Stuttgart.
Acta Orthop. 2023 Jul 4;94:321-327. doi: 10.2340/17453674.2023.13385.
We aimed to determine the minimum 20-year survival rates of a cementless press-fit cup in young patients.
This is a retrospective, single-center, multi-surgeon cohort study investigating the minimum 20-year clinical and radiological outcome of the first 121 consecutive total hip replacements (THRs) using a cementless, press-fit cup (Allofit, Zimmer, Warsaw, IN, USA) performed between 1999 and 2001. 28-mm metal-on-metal (MoM) and ceramic-on-conventionally not highly crosslinked polyethylene (CoP) bearings were used in 71% and 28%, respectively. Median patient age at surgery was 52 (range 21-60) years. Kaplan-Meier survival analysis was conducted for different endpoints.
The 22-year survival rate for the endpoint aseptic cup or inlay revision was 94% (95% confidence interval [CI] 87-96) and 99% (CI 94-100) for aseptic cup loosening. 20 patients (21 THRs; 17%) had died and 5 (5 THRs; 4%) were lost to follow-up. No THR showed evidence of radiographic cup loosening. Osteolysis was observed in 40% of THRs with MoM and 77% with CoP bearings. 88% of THRs with CoP bearings showed significant polyethylene wear.
The investigated cementless press-fit cup, which is still in clinical use today, showed excellent long-term survival rates in patients under the age of 60 years at surgery. However, osteolysis due to polyethylene and metal wear was frequently observed and is a matter of concern in the third decade after surgery.
我们旨在确定年轻患者中无水泥固定压配合杯的最低 20 年生存率。
这是一项回顾性、单中心、多外科医生队列研究,调查了 1999 年至 2001 年间使用无水泥、压配合杯(Allofit,Zimmer,Warsaw,IN,USA)进行的前 121 例连续全髋关节置换术(THR)的最低 20 年临床和放射学结果。71%和 28%分别使用了 28-mm 金属对金属(MoM)和陶瓷对传统非高交联聚乙烯(CoP)轴承。手术时患者的中位年龄为 52 岁(范围 21-60 岁)。进行了不同终点的 Kaplan-Meier 生存分析。
无菌杯或衬垫翻修的 22 年生存率为 94%(95%置信区间 [CI] 87-96),无菌杯松动的生存率为 99%(CI 94-100)。20 名患者(21 例 THR;17%)死亡,5 名患者(5 例 THR;4%)失访。没有 THR 显示出放射性杯松动的证据。MoM 组中有 40%的 THR 和 CoP 组中有 77%的 THR 观察到骨溶解。88%的 CoP 轴承 THR 显示出明显的聚乙烯磨损。
在手术时年龄在 60 岁以下的患者中,研究中使用的无水泥压配合杯显示出优异的长期生存率。然而,由于聚乙烯和金属磨损导致的骨溶解经常被观察到,这是手术后第三十年需要关注的问题。