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Fractal dimension on dental radiographs
A M Bollen1, A Taguchi, P P Hujoel
1Department of Orthodontics, University of Washington, Seattle, Washington 98195, USA.
Dento Maxillo Facial Radiology
|September 26, 2001
Summary
Fractal dimension (FD) measured on panoramic radiographs is lower than on periapical ones. Higher FD indicates decreased bone mass, suggesting panoramic imaging may be an alternative for assessing osteoporosis risk.
Area of Science:
- Oral radiology
- Biomedical imaging
- Osteoporosis research
Background:
- Fractal dimension (FD) quantifies bone structure complexity.
- Assessing bone health from dental radiographs is crucial for elderly populations.
- Previous studies suggest FD correlates with bone mass.
Purpose of the Study:
- Compare FD measurements from periapical and panoramic radiographs.
- Correlate FD with mandibular cortical thickness, morphology, and osteoporotic fracture history.
Main Methods:
- 281 elderly patients (>60 years) underwent periapical and panoramic radiography.
- FD was measured on both radiograph types.
- Mandibular cortical thickness and morphology were assessed from panoramic images.
Main Results:
- FD was lower in the mandible than maxilla, and lower on panoramic than periapical radiographs.
- A negative correlation was found between cortical thickness and FD.
- Higher FD was observed in subjects with thinner, eroded cortices and a history of osteoporotic fractures.
Conclusions:
- FD measurements differ between periapical and panoramic radiographs.
- Increased FD correlates with reduced bone mass and a history of osteoporotic fractures.
- Panoramic radiography may serve as a viable alternative for FD assessment in osteoporosis screening.