Chang-Wan Kim1, Seung-Suk Seo2, Chang-Rack Lee3, Heui-Chul Gwak1, Jung-Han Kim1, Sun-Gyu Jung1. 1. Department of Orthopedic Surgery, Busan Paik Hospital, College of Medicine, Inje University, Busan, Republic of Korea. 2. Department of Orthopedic Surgery, Bumin Hospital, 59, Mandeok-daero, Buk-gu, Busan, Republic of Korea. 3. Department of Orthopedic Surgery, Busan Paik Hospital, College of Medicine, Inje University, Busan, Republic of Korea. Electronic address: leechangrack@inje.ac.kr.
Abstract
BACKGROUND: To evaluate the factors that affect articular cartilage repair after open-wedge high tibial osteotomy (OWHTO) and the relationship between regeneration of articular cartilage repair and clinical outcomes. METHODS: Among the cases of OWHTO that were performed from March 2005 to February 2012, the patients who followed up for >2years and received a second-look arthroscopy were retrospectively reviewed. For clinical evaluation, the Knee Society scores and Western Ontario and McMaster Universities Osteoarthritis Index score were measured. For radiologic evaluation, the Kellgren-Lawrence scale, mechanical femorotibial angle, and joint line obliquity were used. In the initial and second-look arthroscopy, the status of the articular cartilage of the medial compartment was evaluated. RESULTS: A total of 62 knees (61 patients) were included in this study. Articular cartilage repair was observed in 18 knees (29.0%). In multiple logistic regression analysis, patients with Kellgren-Lawrence Grade 4 (OR 0.076; 95% CI 0.007-0.822; P=0.034), the existence of a bipolar lesion (OR 0.108; 95% CI 0.016-0.724; P=0.022), or joint line obliquity >5° (OR 0.109; 95% CI 0.013-0.936; P=0.043) had significantly lower odds of articular cartilage repair compared to the corresponding counter group. In a comparison of clinical outcomes between a group that had articular cartilage repair and a group without repair, no significant difference was observed (P>0.05). CONCLUSIONS: Severe arthrosis, existence of a bipolar lesion, and marked postoperative joint line obliquity had a negative impact on articular cartilage repair after OWHTO. However, articular cartilage repair showed unknown clinical significance.
BACKGROUND: To evaluate the factors that affect articular cartilage repair after open-wedge high tibial osteotomy (OWHTO) and the relationship between regeneration of articular cartilage repair and clinical outcomes. METHODS: Among the cases of OWHTO that were performed from March 2005 to February 2012, the patients who followed up for >2years and received a second-look arthroscopy were retrospectively reviewed. For clinical evaluation, the Knee Society scores and Western Ontario and McMaster Universities Osteoarthritis Index score were measured. For radiologic evaluation, the Kellgren-Lawrence scale, mechanical femorotibial angle, and joint line obliquity were used. In the initial and second-look arthroscopy, the status of the articular cartilage of the medial compartment was evaluated. RESULTS: A total of 62 knees (61 patients) were included in this study. Articular cartilage repair was observed in 18 knees (29.0%). In multiple logistic regression analysis, patients with Kellgren-Lawrence Grade 4 (OR 0.076; 95% CI 0.007-0.822; P=0.034), the existence of a bipolar lesion (OR 0.108; 95% CI 0.016-0.724; P=0.022), or joint line obliquity >5° (OR 0.109; 95% CI 0.013-0.936; P=0.043) had significantly lower odds of articular cartilage repair compared to the corresponding counter group. In a comparison of clinical outcomes between a group that had articular cartilage repair and a group without repair, no significant difference was observed (P>0.05). CONCLUSIONS: Severe arthrosis, existence of a bipolar lesion, and marked postoperative joint line obliquity had a negative impact on articular cartilage repair after OWHTO. However, articular cartilage repair showed unknown clinical significance.
Authors: Anirudh K Gowd; Alexander E Weimer; Danielle E Rider; Edward C Beck; Avinesh Agarwalla; Lisa K O'Brien; Michael J Alaia; Cristin M Ferguson; Brian R Waterman Journal: Arthrosc Sports Med Rehabil Date: 2021-06-24