Korean J Orthod.  1997 Aug;27(4):549-557.

The attrition pattern in Angle Class III malocclusion with facial asymmetry

• Son WS
• Jeon EY
• Kim SJ

Abstract

This study was designed to investigate the attrition pattern in Angle Class III malocclusion with facial asymmetry. The sample consisted of three group, the 20 subjects of normal occlusion group(Group I), the 12 subjects of class III malocclusion without facial asymmetry group(Group II) and 17 subjects of Class III malocclusion with facial asymmetry group(Group III). Attrition areas from canine to second molar on both sides in upper and lower arch, totally twenty, was marked by pencil and measured by computer system(INTERGRAPH CO. USA) 2 times and the average value was used for date processing. All attrition areas were measured 2 times and the average value was used for data processing. The data were statistically analyzed by SAS program. The results of this study were as follows: 1. Total attrition area in Group I was larger than in Group II and III. 2. There was no significant difference in attrition area between right and left side in each group, but attrition area in Group III was larger than in Group I and II. 3. In Group I, Maxillary attrition area was larger than mandibular attrition area, but in Group II and III, there was no significant difference in attrition area between maxilla and mandible. 4. In Group III, the attrition area of deviated side was larger than undeviated side. 5. There was no significant difference in attrition area between chewing side non-chewing side in each group. 6. The total attrition area was unaffected by gender.

Keyword

attrtion area; facial asymmetry; class III malocclusion

MeSH Terms

Facial Asymmetry*
Malocclusion*
Malocclusion, Angle Class III*
Mandible
Mastication
Maxilla
Molar