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Published on: September 1, 2023
Alveolar bone measurement precision for phosphor-plate images
Charles F Hildebolt1, Rex Couture, Nathalia M Garcia
1Radiology, Washington University School of Medicine, St. Louis, Missouri 63110, USA. hildeboltc@mir.wustl.edu
Summary
This study demonstrates precise methods for measuring alveolar bone height using dental radiographs. The least significant change for crest height was less than 0.1 mm, indicating highly accurate measurements.
Area of Science:
- Dental radiology
- Periodontology
- Biomedical imaging
Background:
- Accurate measurement of alveolar bone height is crucial for diagnosing and monitoring periodontal disease.
- Previous methods for measuring alveolar bone changes from radiographs have limitations in precision.
Purpose of the Study:
- To establish methods for determining measurement precision in dental radiography.
- To quantify the precision of alveolar bone measurements using a vacuum-coupled positioning device and phosphor plate imaging.
Main Methods:
- Utilized a vacuum-coupled device and custom bite plates for rigid subject positioning during radiography.
- Obtained serial digital radiographs of mandibular posterior teeth from 51 subjects.
- Measured cementoenamel junction-alveolar crest (CEJ-AC) distances and calculated image subtractions for radiodensity and crest height analysis.
Main Results:
- The least significant change (LSC) for alveolar crest height was determined to be less than 0.1 mm.
- LSC for CEJ-AC distance was 0.49 mm, and for x-ray transmission (radiodensity) was 4%.
- The calculated LSC for crest height represents a significant improvement in measurement precision compared to previous studies.
Conclusions:
- The demonstrated methods provide a highly precise measurement of alveolar crest height (<0.1 mm LSC).
- These methods enable researchers to confidently distinguish true biologic changes from measurement error (equipment/observer variability).
- The findings support the use of these techniques for reliable assessment of periodontal bone levels.
