[目的]探讨不置换髌骨的全膝关节置换术后髌骨的X线变化.[方法]对1999年～2004年间所进行的51例64个膝父节假体进行随访,常规不置换髌骨.平均年龄68.5岁(57～78岁),平均随访4.8年(2.5～8年).在X线正侧位片和髌骨轴位片观察病人髌骨的退变、髌骨外移和倾斜程度的变化.[结果]手术后髌骨倾斜和外移均明显改善.随时间延长,大多数髌骨轨迹居中,没有明显退变.最常见的X线改变有髌骨上下极和外侧面增生,部分髌骨轨迹出现恶化.髌股关节的症状与髌骨的退变无明确相关.[结论]不置换髌骨的膝关节置换术后,髌骨的轨迹可得到明显改善,髌骨不会出现明显退变.“,”[Objective]To investigate the radiographic changes of patella after total knee arthroplasty (TKA) with nonresurfaced patellar.[Methods]Fifty - one patients.(64 knees) underwent TKA with patellar non - resurfaced. Average age was 68.5 years (range, 57～78 years) . Average follow -up was 4. 8 years (range, 2. 5～8 years) . The radiographic changes of patella, patellar tilt, and patellar lateral shift were evaluated. The functional results of patellofemoral joint were analyzed.[Resuits]The patellar tilt and lateral shift were improved obviously after surgery. Most patella tracking lied in the middle and there were no obvious degeneration with the time passing. Osteophytes formation and deterioration of patellar tracking were the most common abnormal radiographic changes. There were no obvious relationship between symptoms of patellofemoral joint and patellar degeneration.[Conclusion]Patellar tracking can be improved immediately after non-resurfaced total knee arthroplasty in esteoarthritis patients. There will not be obvious patellar degenerative changes with time passing.