Comparison of total knee arthroplasty by two methods of subvastus and medial parapatellar in knee osteoarthritis patients
Trauma Monthly: 14 (4); 211-216 Article Type: Research Article
Y, Mirshah Valad
S P, Rahimnia
K. Comparison of total knee arthroplasty by two methods of subvastus and medial parapatellar in knee osteoarthritis patients,
Online ahead of Print
Aims:The best method of total knee arthroplasty (TKA) is still a challenge. The aim of this study was to compare clinical outcomes of two approaches of medial parapatellar and subvastus in total knee arthroplasty. Materials & Methods: 40 knee osteoarthritis patients were divided into two groups by using random allocation. 20 patints were undergone medial parapatellar (classic) and 20 other patients subvastus approach. Range of motion, the ability of knee extension from 30 degrees of flexion, the ability of weight bearing walking and pain using visual analog scale were assessed. The visits were performed before operation, after operation and 2 days, 3 days, 7 days, 14 days, 6 weeks, 12 weeks, 6 months and one year after operation. Results: There was a statistically significant difference regarding range of motion between two groups after one year (108.7±7.5 degrees in classic group and 122.6±26.6 degrees in subvastus group p= 0.003). Pain was statistically significant between two groups after one year (1.4±0.8 in classic group and 0.2±0.5 in subvastus group p<0.001). Mean of ability of extension from 30 degrees of flexion was zero in subvastus and 3.5±2.8 in classic group (p<0.001). Conclusion: Subvastus approach allows faster usage of the knee joint and is a less invasive method than medial parapatellar approach.
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