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Cranial-base morphology in children with class III malocclusion
Hong-Po Chang1, Shu-Hui Hsieh, Yu-Chuan Tseng
1Faculty of Dentistry, Kaohsiung Medical University, Kaohsiung, Taiwan. hopoch@kmu.edu.tw
The Kaohsiung Journal of Medical Sciences
|May 25, 2005
Summary
Class III malocclusion in children is linked to specific cranial base shapes. Shortening and bending of the posterior cranial base may contribute to this condition.
Area of Science:
- Orthodontics and Dental Anatomy
- Craniofacial Morphology Research
Background:
- The relationship between cranial base structure and Class III malocclusion remains unclear.
- Understanding these skeletal differences is crucial for diagnosing and treating malocclusions.
Purpose of the Study:
- To investigate the specific morphologic characteristics of the cranial base in children diagnosed with Class III malocclusion.
- To compare cranial base features between Class III malocclusion patients and individuals with normal occlusion.
Main Methods:
- Lateral cephalograms from 200 children (100 Class III malocclusion, 100 normal occlusion) were analyzed.
- Ten cranial base landmarks were identified and digitized for cephalometric assessment.
- Univariate and multivariate statistical analyses were applied to 7 angular and 18 linear measurements.
Main Results:
- Significant differences in cranial base morphology were observed between the two groups.
- The posterior cranial base region exhibited the most pronounced variations.
- Specific measurements indicated a shortened and more angled posterior cranial base in the Class III group.
Conclusions:
- A shortened and angularly bent cranial base, along with a reduced angle between the cranial base and mandibular ramus, may predispose individuals to Class III malocclusion.
- Further research, including geometric morphometric analysis, is needed to clarify cranial base regional changes and their association with various malocclusions.