Clinical measurements of bone tissue mechanical behavior using reference point indentation.

Area of Science:

• Biomedical Engineering
• Orthopedics
• Materials Science

Background:

• Bone quantity and quality are critical for mechanical behavior and fracture resistance.
• Traditional mechanical testing is destructive, limiting in vivo and longitudinal studies.
• Surrogate measurements are needed for preclinical and clinical evaluation of bone strength.

Purpose of the Study:

• To review clinical studies utilizing reference point indentation (RPI) for bone assessment.
• To emphasize the clinical instrument and fundamental mechanisms of RPI.
• To improve understanding of RPI's tradeoffs and limitations for fragility determination.

Main Methods:

• Reference point indentation (RPI) enables mechanical testing of bone tissue without excision.
• Cyclic- and impact- RPI variants have been used in pre-clinical and clinical studies.
• Review of existing literature on clinical RPI applications and research.

Main Results:

• RPI allows for in vivo mechanical testing of bone, aiding in fracture risk assessment.
• Promising studies show RPI can discern bone pathologies and monitor therapeutic effects.
• Ongoing research investigates RPI's measured aspects and contributing compositional factors.

Conclusions:

• RPI is a versatile tool for clinical assessment of bone quality and strength.
• Understanding RPI's limitations is crucial for its effective clinical application.
• Improved RPI utilization can enhance fragility determination and patient care.