Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees
Recent studies highlighted the crucial contribution of subchondral bone to OA development. Yet, only limited data have been reported on the relation between alteration to cartilage morphology, structural properties of the subchondral bone plate (SBP) and underlying subchondral trabecular bone (STB)....
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Forum Multimedia Publishing LLC
2023-02-01
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| Series: | European Cells & Materials |
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| Online Access: | https://www.ecmjournal.org/papers/vol045/pdf/v045a05.pdf |
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| author | W Colyn F Azari J Bellemans G Harry van Lenthe L Scheys |
| author_facet | W Colyn F Azari J Bellemans G Harry van Lenthe L Scheys |
| author_sort | W Colyn |
| collection | DOAJ |
| description | Recent studies highlighted the crucial contribution of subchondral bone to OA development. Yet, only limited data have been reported on the relation between alteration to cartilage morphology, structural properties of the subchondral bone plate (SBP) and underlying subchondral trabecular bone (STB). Furthermore, the relationship between the morphometry of the cartilage and bone in the tibial plateau and the OA-induced changes in the joint’s mechanical axis remains unexplored. Therefore, a visualisation and quantification of cartilage and subchondral bone microstructure in the medial tibial plateau was performed. End stage knee-OA patients with varus alignment and scheduled for total knee arthroplasty (TKA) underwent preoperative fulllength radiography to measure the hip-knee-ankle angle (HKA) and the mechanical-axis deviation (MAD). 18 tibial plateaux were μ-CT scanned (20.1 μm/voxel). Cartilage thickness, SBP, and STB microarchitecture were quantified in 10 volumes of interest (VOIs) in each medial tibial plateau. Significant differences (p < 0.001) were found for cartilage thickness, SBP, and STB microarchitecture parameters among the VOIs. Closer to the mechanical axis, cartilage thickness was consistently smaller, while SBP thickness and STB bone volume fraction (BV/TV) were higher. Moreover, trabeculae were also more superior-inferiorly oriented, i.e. perpendicular to the transverse plane of the tibial plateau. As cartilage and subchondral bone changes reflect responses to local mechanical loading patterns in the joint, the results suggested that region-specific subchondral bone adaptations were related to the degree of varus deformity. More specifically, subchondral sclerosis appeared to be most pronounced closer to the mechanical axis of the knee. |
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| language | English |
| last_indexed | 2025-03-21T01:27:56Z |
| publishDate | 2023-02-01 |
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| series | European Cells & Materials |
| spelling | doaj.art-c6a5e33ef4ca4d2096efc43fc6ed2af12024-08-03T01:13:48ZengForum Multimedia Publishing LLCEuropean Cells & Materials1473-22622023-02-0145607110.22203/eCM.v045a05Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA kneesW ColynF AzariJ BellemansG Harry van LentheL ScheysRecent studies highlighted the crucial contribution of subchondral bone to OA development. Yet, only limited data have been reported on the relation between alteration to cartilage morphology, structural properties of the subchondral bone plate (SBP) and underlying subchondral trabecular bone (STB). Furthermore, the relationship between the morphometry of the cartilage and bone in the tibial plateau and the OA-induced changes in the joint’s mechanical axis remains unexplored. Therefore, a visualisation and quantification of cartilage and subchondral bone microstructure in the medial tibial plateau was performed. End stage knee-OA patients with varus alignment and scheduled for total knee arthroplasty (TKA) underwent preoperative fulllength radiography to measure the hip-knee-ankle angle (HKA) and the mechanical-axis deviation (MAD). 18 tibial plateaux were μ-CT scanned (20.1 μm/voxel). Cartilage thickness, SBP, and STB microarchitecture were quantified in 10 volumes of interest (VOIs) in each medial tibial plateau. Significant differences (p < 0.001) were found for cartilage thickness, SBP, and STB microarchitecture parameters among the VOIs. Closer to the mechanical axis, cartilage thickness was consistently smaller, while SBP thickness and STB bone volume fraction (BV/TV) were higher. Moreover, trabeculae were also more superior-inferiorly oriented, i.e. perpendicular to the transverse plane of the tibial plateau. As cartilage and subchondral bone changes reflect responses to local mechanical loading patterns in the joint, the results suggested that region-specific subchondral bone adaptations were related to the degree of varus deformity. More specifically, subchondral sclerosis appeared to be most pronounced closer to the mechanical axis of the knee.https://www.ecmjournal.org/papers/vol045/pdf/v045a05.pdfosteoarthritissubchondral bonetibial plateauvarus alignmentμct |
| spellingShingle | W Colyn F Azari J Bellemans G Harry van Lenthe L Scheys Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees European Cells & Materials osteoarthritis subchondral bone tibial plateau varus alignment μct |
| title | Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees |
| title_full | Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees |
| title_fullStr | Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees |
| title_full_unstemmed | Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees |
| title_short | Microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus OA knees |
| title_sort | microstructural adaptations of the subchondral bone are related to the mechanical axis deviation in end stage varus oa knees |
| topic | osteoarthritis subchondral bone tibial plateau varus alignment μct |
| url | https://www.ecmjournal.org/papers/vol045/pdf/v045a05.pdf |
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