Related Experiment Videos
The effect of tooth size discrepancy on occlusion: An experimental study
M Heusdens1, L Dermaut, R Verbeeck
1Department of Orthodontics, School of Dentistry, University of Gent, Belgium.
Summary
Tooth size ratios, including Bolton standards, were compared with epidemiological data. Tooth size discrepancy has a limited effect on occlusion, with significant differences found in anterior ratios.
Area of Science:
- Dentistry
- Orthodontics
- Dental Morphology
Background:
- Tooth size discrepancies can impact occlusal outcomes.
- Established standards like Bolton's ratios are used for assessment.
- Understanding these discrepancies is crucial for treatment planning.
Purpose of the Study:
- Compare Bolton's tooth size ratios with epidemiological data.
- Assess the accuracy of tooth size discrepancy measurements.
- Investigate the effects of tooth size discrepancy, curve of Spee, and extraction on occlusion.
Main Methods:
- Statistical comparison (t-test) of Bolton ratios against published epidemiological data.
- Analysis of tooth size discrepancy measurements for reproducibility.
- Evaluation of occlusal setups with manipulated curve of Spee and simulated extraction.
Main Results:
- No significant difference in overall Bolton ratios, but significant differences in anterior ratios compared to epidemiological studies.
- High reproducibility (99%) in tooth size discrepancy measurements.
- Severe tooth size discrepancy, leveling the curve of Spee, and premolar extraction showed limited effects on the final occlusion.
Conclusions:
- Bolton's anterior tooth size ratios may differ from general population values.
- Tooth size discrepancy has a minimal impact on overall occlusion.
- Orthodontic interventions like extraction and curve of Spee leveling have only slight effects on occlusion in this context.