Relationships between structure, density and strength of human trabecular bone

Area of Science:

• Biomedical Engineering
• Orthopedics
• Materials Science

Background:

• Human trabecular bone strength is crucial for skeletal integrity.
• Osteoporosis and coxarthrosis significantly alter bone structure and reduce strength.
• Accurate assessment of bone strength is vital for diagnosing and managing bone diseases.

Purpose of the Study:

• To investigate the relationships between bone mineral density (BMD), structural parameters, and the compressive strength of human trabecular bone.
• To evaluate the predictive power of combining BMD with structural parameters for bone strength.
• To compare different regression models for assessing bone strength.

Main Methods:

• Samples from human femoral heads (osteoporotic and coxarthrotic) were tested.
• MicroCT scanning was used to measure structural parameters and Bone Mineral Density (BMD).
• Compression tests were performed to determine ultimate compression strength (sigma(c)).
• Multiple regression and response surface regression analyses were employed.

Main Results:

• Combining BMD with structural parameters increased the correlation coefficient (R) for strength prediction by 7-30% compared to using BMD alone.
• Developed and calculated two-variable regression models specific to the study.
• Regression models demonstrated consistent results, validated by the coefficient E.

Conclusions:

• Structural parameters significantly enhance the prediction of human trabecular bone strength when combined with BMD.
• The findings support a more comprehensive approach to bone strength assessment, particularly in diseased states.
• Regression models provide a reliable framework for understanding bone mechanical properties.