Correlation between gray values in cone-beam computed tomography and histomorphometric analysis

Area of Science:

• Oral and Maxillofacial Radiology
• Biomaterials Science
• Dental Imaging

Background:

• Accurate bone density assessment is crucial for dental implantology and reconstructive surgery.
• Histomorphometry provides detailed bone structure analysis but is invasive.
• Cone-beam computed tomography (CBCT) offers a non-invasive imaging alternative.

Purpose of the Study:

• To investigate the correlation between CBCT-derived gray values and histomorphometrically determined bone morphometric parameters.
• To evaluate the potential of CBCT for quantitative bone densitometry.

Main Methods:

• An in vivo study involving 30 maxillary bone samples from 7 sheep.
• CBCT imaging was performed on sheep heads, and gray values were extracted.
• Histomorphometric analysis assessed total bone volume, bone volume, and trabecular thickness.

Main Results:

• Significant positive correlations were found between CBCT gray values and total bone volume (r=0.537, P=0.002).
• Strong correlations were observed between CBCT gray values and bone volume (r=0.672, P<0.001) and trabecular thickness (r=0.692, P<0.001).

Conclusions:

• CBCT gray values demonstrate a significant and acceptable association with bone morphometric parameters.
• CBCT shows promise as a non-invasive method for bone densitometry in the maxillofacial region.