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Hokkaido University Collection of Scholarly and Academic Papers >
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Effect of High Tibial Osteotomy on the Distribution of Subchondral Bone Density Across the Proximal Tibial Articular Surface of the Knee With Medial Compartment Osteoarthritis
| Title: | Effect of High Tibial Osteotomy on the Distribution of Subchondral Bone Density Across the Proximal Tibial Articular Surface of the Knee With Medial Compartment Osteoarthritis |
| Authors: | Iwasaki, Koji Browse this author →KAKEN DB | | Kondo, Eiji Browse this author →KAKEN DB | | Matsubara, Shinji Browse this author | | Matsuoka, Masatake Browse this author | | Endo, Kaori Browse this author | | Yokota, Isao Browse this author | | Onodera, Tomohiro Browse this author | | Iwasaki, Norimasa Browse this author |
| Keywords: | high tibial osteotomy | | knee | | osteoarthritis | | stress distribution | | CT-osteoabsorptiometry | | alignment |
| Issue Date: | 1-May-2021 |
| Publisher: | SAGE Publications |
| Journal Title: | American journal of sports medicine |
| Volume: | 49 |
| Issue: | 6 |
| Start Page: | 1561 |
| End Page: | 1569 |
| Publisher DOI: | 10.1177/03635465211002537 |
| Abstract: | Background: The effect of high tibial osteotomy (HTO) on the stress distribution across the knee joint is not completely understood. Subchondral bone density is considered to reflect the pattern of stress distribution across a joint surface. Purpose: To assess the distribution of subchondral bone density across the proximal tibia in nonarthritic knees and in the knees of patients with osteoarthritis (OA) before and after HTO. Study Design: Cohort study; Level of evidence, 3. Methods: We retrospectively collected radiological and computed tomography data from 16 patients without OA (control group) and 17 patients with OA. Data from the OA group were collected before and 1.5 years after HTO. Subchondral bone density of the proximal tibia was assessed with computed tomography-osteoabsorptiometry. The locations and percentages represented by high-density areas (HDAs) on the articular surface were quantitatively analyzed. Results: The ratio of the HDA of the medial compartment to the total HDA (medial ratio) was significantly higher in the preoperative OA group (mean, 80.1%) than in the control group (61.3%) (P < .001). After HTO, the medial ratio decreased significantly to 75.1% (P = .035 in comparison with preoperative values) and was significantly correlated with the hip-knee-ankle angle in both groups: control (r = -0.551; P = .033) and OA (r = -0.528; P = .043). The change in medial ratio after HTO was significantly correlated with the change in hip-knee-ankle angle (r = 0.587; P = .035). In the medial compartment, the HDA in the most lateral region of 4 subregions increased after HTO, but that in 3 medial subregions decreased. Conclusion: In this exploratory study, HTO shifted the HDA of the medial compartment of the proximal tibial articular surface toward the lateral compartment. In contrast, the HDA of the most lateral region of the medial compartment increased after HTO. This change in subchondral bone density may result from the change in stress distribution. |
| Rights: | Koji Iwasaki, Eiji Kondo, Shinji Matsubara, Masatake Matsuoka, Kaori Endo, Isao Yokota, Tomohiro Onodera, Norimasa Iwasaki, Effect of High Tibial Osteotomy on the Distribution of Subchondral Bone Density Across the Proximal Tibial Articular Surface of the Knee With Medial Compartment Osteoarthritis, The American Journal of Sports Medicine, Vol.49(6) p. 1561-1569 Copyright © 2021 The Author(s). DOI:10.1177/03635465211002537 |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/82172 |
| Appears in Collections: | 医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 岩崎 浩司
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