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[Accuracy and sensibility of computer -aided alveolar bone density quantitative measuring system]
1Dept. of Stomatology, The Third Hospital of Peking University, Beijing 100191, China.
Summary
A new system quantifies alveolar bone density using digital radiographs and computer analysis. This method accurately measures hydroxyl-phosphorite (HP) density, proving reliable for clinical comparisons.
Area of Science:
- Dental Radiology
- Bone Densitometry
- Quantitative Imaging
Background:
- Alveolar bone density is crucial for periodontal health and implant success.
- Accurate quantitative assessment of alveolar bone density is challenging with conventional methods.
Purpose of the Study:
- To establish and validate a quantitative system for measuring alveolar bone density.
- To estimate the area density of hydroxyl-phosphorite (HP) in alveolar bone using digital radiographs.
Main Methods:
- Developed a system using grey level analysis on standardized digital periapical radiographs.
- Utilized an aluminum step wedge for calibration and computer techniques for analysis.
- Established linear regression equations correlating equivalent aluminum thickness (EAT) and corrected grey level intensity (CGL) with HP density.
Main Results:
- Significant correlation found between EAT/CGL and HP density.
- Low bias ratio (<5%) achieved when EAT > 0.67 mm or CGL > 41.
- System effectively detects HP density changes as low as 0.17-0.18 mg/mm².
Conclusions:
- The developed quantitative alveolar bone density measuring system demonstrates acceptable accuracy and sensitivity.
- The system is suitable for longitudinal and cross-sectional comparisons of alveolar bone density.
