Chinese Journal of Tissue Engineering Research ›› 2016, Vol. 20 ›› Issue (4): 476-480.doi: 10.3969/j.issn.2095-4344.2016.04.004

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Functional recovery and complications in elderly patients with total knee arthroplasty after patellar lateral displacement

Sun Feng1, Wang Jun-xin1, Wang Li-ming2, Wang Tong2   

  1. 1Department of Orthopedics, Sixth People’s Hospital, Zhangjiagang 215600, Jiangsu Province, China; 2Department of Orthopedics, First Hospital of Nanjing City, Nanjing 210000, Jiangsu Province, China
  • Received:2015-11-07 Online:2016-01-22 Published:2016-01-22
  • Contact: Sun Feng, Department of Orthopedics, Sixth People’s Hospital, Zhangjiagang 215600, Jiangsu Province, China
  • About author:Sun Feng, Professor, Chief physician, Department of Orthopedics, Sixth People’s Hospital, Zhangjiagang 215600, Jiangsu Province, China
  • Supported by:

     the National Natural Science Foundation of China, No. 81171851

Abstract:

BACKGROUND: Artificial total knee arthroplasty in the treatment of knee osteoarthritis can effectively eradicate the late knee pain, correct deformity, improve joint function, but the use of patella is not conducive to the recovery, and it is easy to cause postoperative complications. Therefore, patellar lateral shift, instead of patella minimally invasive therapy, has attracted more and more people’s attention, which increased excellent and good rate of operation.
OBJECTIVE: To investigate the effects of patellar turnover and patellar lateral displacement on knee function 
recovery and complications of elderly patients with total knee arthroplasty.
METHODS: A total of 80 knees of 40 elderly patients with bilateral knee osteoarthritis were selected. All patients according to the random number table method were divided into two groups with 40 knees of 20 cases in each group. The patients in the study group received patellar lateral shift operation, while the patients in the control group received the patellar turnover. Curative effects, the recovery of knee joint function and occurrence of complications were compared between the two groups at 1 week, 3 months, 6 months and 1 year after arthroplasty. 
RESULTS AND CONCLUSION: No significant difference in 90° flexion time in the knee was detected between the two groups after replacement (P > 0.05). Active straight leg raising time was shorter in the study group than in the control group (P < 0.05). No significant difference in passive range of motion was detectable between the two groups at 6 months after replacement. Active and passive ranges of motion were significantly better in the study group than in the control group at various time points (P < 0.05). There were no significant differences in Visual Analog Scale pain scores and postoperative complications between the two groups (P > 0.05). These results verified that patellar lateral displacement for elderly patients with total knee arthroplasty is conducive to early knee function recovery after surgery, and it is safe and reliable.