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[Comparative study of craniofacial structure between UCLP and Class III malocclusions]
1Department of Orthodontics, Ninth People's Hospital, School of Stomatology, Shanghai Second Medical University, Shanghai 200011, China.
Shanghai Kou Qiang Yi Xue = Shanghai Journal of Stomatology
|September 7, 2004
Summary
Patients with repaired cleft lip and palate exhibit distinct dentocraniofacial morphology compared to those with untreated Class III malocclusion. The cleft group shows smaller maxilla and mandible, with altered mandibular rotation.
Area of Science:
- Dentofacial Orthopedics
- Craniofacial Morphology
- Cleft Lip and Palate
Background:
- Class III malocclusion presents significant challenges in dentofacial development.
- Unilateral cleft lip and palate (UCLP) can lead to complex craniofacial alterations.
- Understanding morphological differences is crucial for effective treatment planning.
Purpose of the Study:
- To compare dentofacial morphology between UCLP patients and individuals with non-surgical Class III malocclusion.
- To identify specific skeletal and dental differences impacting facial structure.
Main Methods:
- Cephalometric analysis of 39 UCLP patients (12-15 years) and 40 Class III malocclusion patients (12-15 years).
- Quantitative assessment of craniofacial structures, including skeletal and dental relationships.
Main Results:
- UCLP group demonstrated smaller SNA and SNB angles compared to the Class III group.
- The mandible in the cleft group showed downward and backward rotation with a more obtuse gonial angle.
- Retroclined upper incisors were observed in the UCLP group, while lower incisor inclination showed no difference.
Conclusions:
- The UCLP group presented with a smaller maxilla and mandible relative to the Class III group.
- A clockwise rotation of the mandibular plane was a significant finding in the cleft population.