Related Experiment Videos
Quantification of fracture healing with three-dimensional computed tomography
F C den Boer1, J A Bramer, P Patka
1Department of Surgery, Free University Hospital, Amsterdam, The Netherlands.
Archives of Orthopaedic and Trauma Surgery
|August 26, 1998
Summary
Three-dimensional computed tomography (CT) can objectively measure fracture healing. Callus density, not volume, measured by 3D CT, accurately predicts bone strength and healing extent.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Radiology
Background:
- Objective evaluation of fracture healing requires quantitative methods.
- Three-dimensional computed tomography (3D CT) offers potential for measuring callus volume and density.
Purpose of the Study:
- To investigate 3D CT as a method for quantifying fracture healing in an animal model.
- To assess the relationship between callus characteristics and biomechanical properties.
Main Methods:
- A closed tibial fracture was created in 23 goats and stabilized with a cast.
- Radiographical, CT, and biomechanical analyses were performed at 2, 4, and 6 weeks post-fracture.
- 3D reconstructions from CT scans were used to measure callus volume and mean density.
Main Results:
- Callus volume reached maximum by 2 weeks, while density, torsional strength, and stiffness increased over time.
- Callus volume did not correlate with torsional properties.
- Callus density significantly predicted both torsional strength (R2 = 0.72) and stiffness (R2 = 0.82).
Conclusions:
- Callus density, measured by 3D CT, is a reliable predictor of fracture consolidation extent.
- 3D CT with reconstruction is a valid technique for quantifying fracture healing.