Gap balancing improves Squat function and knee function, fin
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To better understand the effects of the two techniques on knee function and squat function in patients with knee osteoarthritis after primary total knee arthroplasty (TKA), researchers compared the measured resection (MR) and gap balancing (GB) techniques in patients with knee osteoarthritis after primary total knee arthroplasty (TKA).

A prospective randomized controlled trial was conducted with 96 patients with knee osteoarthritis undergoing primary TKA randomized to GB group (n = 48) and MR group (n = 48). Intraoperative indicators (operation time, osteotomy volume of medial and lateral of posterior femoral condyles, external rotation angle) were recorded during operation.

At 1, 3, 6, and 12 months after surgery, all the patients came to the hospital for review and underwent the pain severity, Western Ontario and McMaster University Osteoarthritis Index (WOMAC), knee joint range of motion, Oxford Knee Score (OKS), and American Knee Society Score (AKSS) tests. All patients were followed up for more than 1 year.

Results:
--The osteotomy volume of the medial femoral condyle in the GB group was higher than that in the MR group and the operation time in the GB group was shorter than that in the MR group.

--At 1, 3, 6, and 12 months after surgery, the pain severity in the GB group was lower than that in the MR group, the knee range of motion in the GB group was larger than that in the MR group, the WOMAC of the GB group was lower than that of the MR group, the OKS of the GB group was higher than that of the MR group the AKSS of the GB group was higher than that of the MR group.

--The incidence of postoperative complications in the GB group (4.17%) was significantly lower than that in the MR group (18.75%).

To summarize, the GB technique effectively reduces procedure time, relieves pain, improves knee range of motion, improves squat and knee function, reduces osteoarthritis index, and reduces the incidence of complications, and is worthy of clinical popularization and application.

Source: https://josr-online.biomedcentral.com/articles/10.1186/s13018-021-02367-9
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