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Assessment of apical root resorption using digital reconstruction
E Reukers1, G Sanderink, A M Kuijpers-Jagtman
1Department of Orthodontics and Oral Biology, University of Nijmegen, The Netherlands.
Dento Maxillo Facial Radiology
|March 3, 1998
Summary
Mathematical computer-based reconstruction accurately measures apical root resorption after orthodontic treatment. This digital method corrects for varied imaging angles, proving reliable for monitoring treatment effects in serial dental radiographs.
Area of Science:
- Dentistry
- Orthodontics
- Radiology
Background:
- Apical root resorption is a common side effect of orthodontic treatment.
- Accurate measurement of root resorption is crucial for monitoring treatment outcomes.
- Traditional radiographic methods can be affected by varying projection angles.
Purpose of the Study:
- To evaluate the accuracy of a novel mathematical computer-based reconstruction technique.
- To assess the in vitro and in vivo reliability of this method for measuring apical root resorption.
- To determine if this digital reconstruction can correct for differing imaging geometries.
Main Methods:
- An in vitro gold standard for root resorption was established using calipers on extracted teeth.
- Radiographs of teeth were mathematically reconstructed from multiple projection angles.
- In vivo analysis involved 82 teeth from 61 patients undergoing orthodontic therapy.
Main Results:
- In vitro, the mathematical reconstruction showed a small inter-observer error of 1.8%.
- In vivo, duplicate measurements had a low error of 2.2% and high correlation (0.94).
- The mean tooth length reduction due to resorption was 7.8%.
Conclusions:
- Digital reconstruction is a reliable method for measuring apical root resorption.
- The technique effectively corrects for variations in radiographic projection angles.
- This digital approach aids in monitoring orthodontic treatment effects using serial dental radiographs.