Prediction of cortical bone porosityIn Vitro by microcomputed tomography

Area of Science:

• Orthopedics
• Biomaterials Science
• Bone Histology

Background:

• Intracortical porosity significantly influences cortical bone mechanical strength.
• The role of other microstructural parameters, like osteon dimensions, in bone strength remains under investigation.

Purpose of the Study:

• To assess the predictive capability of microcomputed tomography (µCT) for evaluating porosity and other microstructural characteristics in human cortical bone biopsies.
• To compare in vitro µCT measurements with traditional histological analyses.

Main Methods:

• Harvesting femoral cortical bone specimens from 24 patients undergoing total hip replacement.
• Performing in vitro microcomputed tomography (µCT) for intracortical porosity and bone mineral density (BMD) measurements.
• Comparing µCT data with structural parameters obtained from histological sections of the same specimens.

Main Results:

• A robust correlation (r=0.95, P<0.0001) was observed between intracortical porosity measured by µCT and histological porosity.
• µCT-derived porosity effectively predicted other porous structure dimensions.
• Bone mineral density (BMD) inverse was significantly associated with osteonal area (r=-0.76, P<0.0001).

Conclusions:

• Microcomputed tomography (µCT) provides a potent, non-destructive in vitro method for quantifying intracortical porosity in cortical bone.
• µCT is a reliable tool for assessing microstructural parameters related to bone porosity and potentially bone strength.