Abstract:

BACKGROUND: Artificial joint replacement can relieve pain, correct deformity and improve life quality of patients with severe joint disease.
OBJECTIVE: To investigate the methods and clinical results of total knee replacement in patients with valgus knee deformity．
METHODS: A total of 9 cases (9 knees) of valgus knee, aged 50-75 years, were treated with selected. X-ray before operation showed average 12.9° valgus (ranging from 10° to 37 °). Medial parapatellar approach was adopted, and standard osteotomy and only lateral softtissue release were performed, following by total knee replacement. Clinical and radiographic evaluations including range of motion (ROM) and Knee Society Score System (KSS) were performed during follow-up.
RESULTS AND CONCLUSION: The valgus angle was reduced from 12.9° to 4.3° after replacement, and range of motion was improved from 75° to 105°. The average HSS scores increased from preoperative 31.17 to postoperative 87.83. All changes were significantly different (P < 0.01). All valgus was corrected basically. All of the cases had no pains after operation, and the function of knees were apparently improved. The techniques of medial parapatellar approach, standard osteotomy and only lateral soft tissue release can correct a fixed valgus deformity successfully in patients undergoing primary total knee replacement, and preliminarily provides excellent results. The follow-up is necessary for further long-term outcome.