全膝關節置換術後聚乙烯墊片創傷性脫位引發髕骨韌帶斷裂：個案報告

Traumatic Dislodgement of the Tibial Polyethylene Insert with a Patellar Tendon Rupture Following a High-Flex Posterior-Stabilized Total Knee Replacement: A Case Report

隨著社會高齡化，全膝關節置換術治療退化性關節炎已漸趨成熟，高屈曲後穩定型膝關節假體植入物提供了高運動彎曲度而且可靠的手術成果，也是廣泛被使用的全膝關節置換手術假體。在過去的文獻中，只有五例聚乙烯墊片在高屈曲後穩定型膝關節中發生脫位曾被報導。我們報告一例八十一歲的男性個案，患者在人工膝關節假體植入七年後出現發生聚乙烯墊片創傷性脫位進而引發髕骨韌帶斷；手術中發現聚乙烯墊片在脛骨假體側磨損；手術治療後一年隨訪，左膝運動範圍完全恢復．

 

Polyethylene insert dislodgement has been most commonly reported following mobile-bearing and cruciate-retaining total knee replacements (TKRs). Only five cases of polyethylene insert dislodgement following a high-flex posterior-stabilized TKRs have been reported. We report a case of an 81-year-old male patient who presented with a traumatic dislodgement of insert that caused tibial component failure 7 years after prosthesis implantation. At the 1-year follow-up after surgical treatment, the range of motion of the left knee had fully recovered.