Back to Search
Start Over
Human articular cartilage mechanosensitivity is related to histological degeneration – a functional MRI study
- Source :
- Osteoarthritis and Cartilage. 27:1711-1720
- Publication Year :
- 2019
- Publisher :
- Elsevier BV, 2019.
-
Abstract
- Summary Objective To investigate changes in response to sequential pressure-controlled loading and unloading in human articular cartilage of variable histological degeneration using serial T1ρ mapping. Method We obtained 42 cartilage samples of variable degeneration from the medial femoral condyles of 42 patients undergoing total knee replacement. Samples were placed in a standardized artificial knee joint within an MRI-compatible whole knee-joint compressive loading device and imaged before (δ0), during (δld1, δld2, δld3, δld4, δld5) and after (δrl1, δrl2, δrl3, δrl4, δrl5) pressure-controlled loading to 0.663 ± 0.021 kN (94% body weight) using serial T1ρ mapping (spin-lock multigradient echo sequence; 3.0T MRI system [Achieva, Philips]). Reference assessment included histology (Mankin scoring) and conventional biomechanics (Tangent stiffness). We dichotomized sample into intact (n = 21) and degenerative (n = 21) based on histology and analyzed data using Mann Whitney, Kruskal Wallis, one-way ANOVA tests and Spearman's correlation, respectively. Results At δ0, we found no significant differences between intact and degenerative samples, while the response-to-loading patterns were distinctly different. In intact samples, T1ρ increases were consistent and non-significant, while in degenerative samples, T1ρ increases were significantly higher (P = 0.004, δ0 vs δld1, δ0 vs δld3), yet undulating and variable. With unloading, T1ρ increases subsided, yet were persistently elevated beyond δ0. Conclusion Cartilage mechanosensitivity is related to histological degeneration and assessable by serial T1ρ mapping. Unloaded, T1ρ characteristics are not significantly different in intact vs degenerative cartilage, while load bearing is organized in intact cartilage and disorganized in degenerative cartilage.
- Subjects :
- Cartilage, Articular
Male
0301 basic medicine
Knee Joint
Biomedical Engineering
Articular cartilage
Degeneration (medical)
Load bearing
03 medical and health sciences
T1ρ mapping
0302 clinical medicine
Rheumatology
Humans
Medicine
Orthopedics and Sports Medicine
Prospective Studies
Aged
Aged, 80 and over
030203 arthritis & rheumatology
business.industry
Cartilage
Biomechanics
Histology
Anatomy
Middle Aged
Osteoarthritis, Knee
Magnetic Resonance Imaging
Biomechanical Phenomena
030104 developmental biology
medicine.anatomical_structure
Mann–Whitney U test
Female
Stress, Mechanical
business
Mechanoreceptors
Subjects
Details
- ISSN :
- 10634584
- Volume :
- 27
- Database :
- OpenAIRE
- Journal :
- Osteoarthritis and Cartilage
- Accession number :
- edsair.doi.dedup.....106189485a4de857bb223adb12a64f23