Meniscal damage associated with increased local subchondral bone mineral density: a Framingham study

Area of Science:

• Orthopedics
• Radiology
• Biomedical Engineering

Background:

• The menisci and medial vs. lateral tibial plateau bone mineral density ratio (M:L BMD) are associated with knee loading.
• Understanding compartment-specific meniscal damage in relation to regional tibial BMD is crucial for osteoarthritis research.

Purpose of the Study:

• To investigate the association between compartment-specific meniscal damage and the medial vs. lateral tibial plateau bone mineral density ratio (M:L BMD).
• To test the hypothesis that higher M:L BMD (indicating increased medial subchondral BMD) is associated with medial meniscal damage, and lower ratios with lateral meniscal damage.

Main Methods:

• Cross-sectional study of participants from the Framingham Osteoarthritis Cohort.
• Evaluation of knee magnetic resonance images (MRIs), bone mineral densities (BMDs), and x-rays.
• Logistic regression and generalized estimating equations (GEE) used to analyze the relationship between M:L BMD and meniscal damage, adjusting for age and sex.

Main Results:

• A significant trend was observed between increasing M:L BMD quartiles and prevalent medial meniscal damage (P for trend <0.0001).
• Conversely, increasing M:L BMD quartiles showed a significant inverse relationship with prevalent lateral meniscal damage (P for trend = 0.001).
• Odds ratios for medial meniscal damage increased from 1.0 to 8.9 across M:L BMD quartiles, while odds ratios for lateral meniscal damage decreased from 1.0 to 0.2.

Conclusions:

• Meniscal damage is associated with higher regional tibial bone mineral density (BMD) within the same compartment.
• Findings emphasize a strong relationship between meniscal integrity and regional tibial subchondral BMD.