Singh Vinay Kumar, Singh Pankaj Kumar, Singh Yashwant, Singh Alka, Javed Sadaf, Abdunabi Murad
Luton and Dunstable Hospitals NHS Foundation Trust, Lewsey Road, Luton, LU4 0DZ, UK.
J Med Case Rep. 2010 Jan 15;4:11. doi: 10.1186/1752-1947-4-11.
Total knee arthroplasty is a well-established procedure with gratifying results. There is no consensus in the literature whether to routinely resurface the patella while performing total knee arthroplasty or not. Although an extremely rare occurrence in clinical practice, patellar prosthesis dislocation is a possible complication resulting from total knee arthroplasty.
We report a rare case of atraumatic spontaneous dislocation of patellar prosthesis in a 63-year-old Caucasian man of British origin with patellar tendon injury. The patient was treated successfully through a revision of the patellar component and tendon repair. In two years follow-up the patient is asymptomatic with no sign of loosening of his patellar prosthesis.
A thorough understanding of knee biomechanics is imperative in performing total knee arthroplasty in order to achieve a better functional outcome and to prevent early prosthetic failure.
全膝关节置换术是一种成熟的手术，效果令人满意。对于在进行全膝关节置换术时是否常规对髌骨进行表面置换，文献中尚无共识。尽管在临床实践中极为罕见，但髌骨假体脱位是全膝关节置换术可能导致的并发症。
我们报告了一例罕见的非创伤性自发性髌骨假体脱位病例，患者为一名63岁的英国裔白种男性，伴有髌腱损伤。通过翻修髌骨部件和修复肌腱，患者得到了成功治疗。在两年的随访中，患者无症状，髌骨假体无松动迹象。
在进行全膝关节置换术时，必须深入了解膝关节生物力学，以获得更好的功能结果并防止早期假体失败。
