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Fluctuating Dental Arch Asymmetry in Different Malocclusion Groups
Ana Škrinjarić1, Mladen Šlaj2, Martina Šlaj2
1Dental Polyclinic Zagreb.
Acta Stomatologica Croatica
|July 24, 2018
Summary
Dental arch fluctuating asymmetry (FA) is higher in Class III malocclusions compared to Class I and II. This increased FA may indicate greater developmental instability in Class III cases.
Area of Science:
- Orthodontics
- Dental Morphology
- Human Genetics
Background:
- Fluctuating asymmetry (FA) reflects developmental instability.
- Dental malocclusions, classified by Angle's system, represent variations in tooth and jaw relationships.
Purpose of the Study:
- To quantify and compare fluctuating asymmetry (FA) in dental arches across different malocclusion types (Class I, II, and III).
Main Methods:
- 131 patient dental models (Class I, II, III) were digitized.
- Six arch widths and five arch depths were measured.
- Total weighted asymmetry (TWA) was calculated to assess FA.
Main Results:
- Class III malocclusions exhibited the highest FA, while Class I showed the lowest.
- Males demonstrated greater asymmetry than females.
- Mandibular arches had higher FA than maxillary arches across all groups.
Conclusions:
- Significant differences in FA were observed among malocclusion groups.
- Higher FA in Class III malocclusion suggests increased developmental instability.
- FA may serve as a marker for developmental stress in Class III malocclusion.
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