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Intermaxillary Tooth Size Discrepancies among Different Malocclusion Groups in Indian Population.
Devashish S Sawai1, Rishiraj S Karki1, Vidisha Punetha1
1Department of Dentistry, Government Doon Medical College, Dehradun, Uttarakhand, India.
Journal of Pharmacy & Bioallied Sciences
|January 12, 2026
Summary
This study found that the Bolton ratio is reliable in the Indian population. While anterior Bolton ratios showed significant increases in Class II malocclusion, overall ratios were largely consistent across groups.
Area of Science:
- Dentistry
- Orthodontics
- Dental Morphology
Background:
- Assessing tooth-to-jaw size discrepancies is crucial in orthodontics.
- The Bolton ratio is a widely used index for evaluating these discrepancies.
Purpose of the Study:
- To compare Overall and Anterior Bolton ratios in Indian individuals with different malocclusion types.
- To evaluate the applicability of standard Bolton ratios within the Indian population.
Main Methods:
- Analysis of 300 pre-treatment dental casts from Indian patients with Angle's Class I, II, and III malocclusions.
- Measurement of Anterior and Overall Bolton ratios and comparison with established Bolton standards.
- Gender-based analysis of Bolton ratios.
Main Results:
- Mean overall Bolton ratios showed non-significant differences across malocclusion groups.
- Mean anterior Bolton ratios were non-significantly increased in Class I and III malocclusions but significantly increased in Class II malocclusions compared to standards.
- A statistically significant increase in mean overall Bolton ratio was observed in Class II male patients.
Conclusions:
- The Bolton ratio demonstrates reliability for assessing tooth-jaw size discrepancies in the Indian population.
- Anterior Bolton ratio variations, particularly in Class II malocclusions, warrant consideration in orthodontic treatment planning for this demographic.
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