Related Experiment Video
Updated: May 15, 2026
09:02
Cortical Bone Assessment Using Ultrasonic Guided Waves: A Reproducibility Study in a Healthy Population
Published on: January 31, 2025
How accurate is CBCT in measuring bone density? A comparative CBCT-CT in vitro study.
Michele Cassetta1, Luigi Vito Stefanelli, Andrea Pacifici
1Department of Oral and Maxillofacial Sciences, School of Dentistry, "Sapienza" University of Rome, Rome, Italy.
Clinical Implant Dentistry and Related Research
|January 9, 2013
Summary
Cone beam computed tomography (CBCT) and conventional multislice CT showed significant differences in bone density values. A conversion ratio is needed for accurate bone density assessment with CBCT imaging.
Area of Science:
- Oral and Maxillofacial Radiology
- Medical Imaging Technology
Background:
- Cone beam computed tomography (CBCT) is increasingly utilized for oral and maxillofacial imaging.
- Conventional multislice computed tomography (CT) is a standard for bone density assessment.
Purpose of the Study:
- To compare bone density values (gray density values) obtained from CBCT and conventional CT.
- To determine the statistical significance and correlation between bone density measurements from both imaging modalities.
Main Methods:
- Twenty dry human mandibles were scanned using both CBCT and conventional CT.
- Scan images were superimposed using specialized software to align identical spatial coordinates.
- Gray density values (voxel value [VV] for CBCT, Hounsfield unit [HU] for CT) were extracted and statistically analyzed using t-tests and Pearson's correlation.
Main Results:
- A statistically significant difference was found between CBCT (VV) and CT (HU) bone density values (p ≤ .05).
- Pearson's correlation coefficients demonstrated a statistically significant linear correlation between VV and HU values.
Conclusions:
- While CBCT offers lower radiation dose and cost, its bone density values (VV) differ significantly from CT (HU).
- A conversion ratio is necessary to accurately interpret bone density using CBCT data, making it a potentially viable substitute for CT in specific applications.
