Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (9): 1337-1342.doi: 10.3969/j.issn.2095-4344.2014.09.005

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Effect of total knee arthroplasty via different approaches on extensor mechanism

Zhou Chao, Peng Wei, Si Zhi-ping   

  1. Department of Orthopedics, The Third People’s Hospital of Wuxi, Wuxi  214041, Jiangsu Province, China
  • Online:2014-02-26 Published:2014-02-26
  • About author:Zhou Chao, Attending physician, Department of Orthopedics, The Third People’s Hospital of Wuxi, Wuxi 214041, Jiangsu Province, China

Abstract:

BACKGROUND: Traditional total knee arthroplasty adopts medial parapatellar approach, which induces severe trauma, requires long-term rehabilitation, and interferes the end point of quadriceps femoral tendon on superior patellar pole. Total knee arthroplasty by subvastus approach has no impact on the knee-extension equipment, but it cannot provide sufficient exposure of surgical field and can induce damage to femoral muscle, so its application and safety need further exploration.
OBJECTIVE: To explore clinical effect of total knee arthroplasty by subvastus approach and medial parapatellar approach.
METHODS: A total of 78 patients with 82 knees who were candidates for total knee arthroplasty were randomly divided into two groups. Treatment group (39 cases; 41 knees) was given subvastus approach and control group (39 cases; 41 knees) was given median parapatellar approach. The knee function, range-of-motion of knee joint and complications after total knee arthroplasty were observed and compared.
RESULTS AND CONCLUSION: Compared with control group, the operation time in treatment group was significantly increased, while the postoperative wound drainage, straight leg raising time and walking time were obviously reduced (P < 0.05). The scores of HSS before surgery and 12 weeks after surgery were not significantly different between the two groups (P > 0.05), while at 1 and 6 weeks after surgery the scores in treatment group were significantly higher than those in control group (P < 0.05). The range-of-motion of knee joint and MMT rank for quadriceps muscle were significantly improved in two groups after treatment (P < 0.05), and those indicators in treatment group were more significant than the control group (P < 0.05). The incidences of complications in treatment group and control group were 2.6% and 15.4%, respectively, with statistically significant difference (P < 0.05). The total knee arthroplasty by subvastus approach has less impact on the extensor mechanism, improves the recovery of knee function and range-of-motion of knee joint, and reduces the incidence of complications.


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


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Key words: arthroplasty, replacement, knee, joint deformities, acquired, range of motion, articular, recovery of function

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