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Variations in tooth size and arch dimensions in Malay schoolchildren
Khalid W Hussein1, Zainul A Rajion, Rozita Hassan
1School of Dental Sciences, Universiti Sains Malaysia, Kelantan, Malaysia.
Australian Orthodontic Journal
|January 2, 2010
Summary
This study found that while some tooth sizes differ significantly across malocclusion types (Class I, II, III), arch dimensions often do not. Boys generally exhibit wider teeth and arch dimensions compared to girls.
Area of Science:
- Orthodontics
- Dental Anthropology
- Craniofacial Morphology
Background:
- Malocclusion prevalence varies across populations.
- Understanding variations in tooth and arch dimensions is crucial for orthodontic diagnosis and treatment planning.
- Gender and malocclusion type can influence craniofacial morphology.
Purpose of the Study:
- To compare mesio-distal tooth sizes and dental arch dimensions.
- To analyze differences in Malay boys and girls.
- To investigate variations across Class I, Class II, and Class III malocclusions.
Main Methods:
- 150 subjects (12-16 years old) with Class I, II, or III malocclusions were analyzed.
- Mesio-distal tooth sizes, intercanine, and intermolar widths were measured using digital calipers.
- Arch lengths and perimeters were measured using AutoCAD software.
Main Results:
- Class I malocclusion showed smaller upper lateral incisors and canines compared to Class II and III.
- Boys had significantly wider teeth and arch dimensions (intermolar, intercanine) than girls.
- No significant differences were found in arch lengths or perimeters between malocclusion groups.
Conclusions:
- Statistically significant tooth size differences do not always correlate with significant arch dimension changes.
- Boys generally possess wider teeth and larger arch dimensions than girls.
- These findings contribute to understanding sexual dimorphism and malocclusion-related morphological variations.
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