# 편측성(片側性) 순(脣), 구개열자(口蓋裂者)의 상과치열궁(上顆齒列弓) 및 구개(口蓋)에 관(關)한 연구(?究)

• Son, Woo Sung (Department of Orthodontics, College of Dentistry, Seoul National University) ;
• Yang, Won Sik (Department of Orthodontics, College of Dentistry, Seoul National University)
• 손우성 (서울대학교 치과대학 교정학교실) ;
• 양원식 (서울대학교 치과대학 교정학교실)
• Published : 1984.03.01

#### Abstract

A comparative study was undertaken to investigate the collapse of maxillary dental arch and palate in unilateral cleft lip and palate individuals. The material for this study consisted of 39 subjects with repaired unilateral cleft lip and palate (30 males, 9 females). The measurements of unilateral cleft lip and palate individuals were compared with the measurements of normal individuals (30 males, 30 females). All the subjects were in the mixed dentition stage and the mean age was almost the same. The following conclusions were obtained. 1. A large number of the maxillary dental arch of the unilateral cleft lip and palate individuals showed ${\Omega}$-shape, and the arch length was shorter than that of normal individuals. The intermolar width did not show significant difference between cleft group and group, but the intercanine width was mcuh smaller than that of normal individuals. 2. The palate of the unilateral cleft lip and palate subjects showed shorter and shallower form than that of normal subjects. 3. The palatal area of the unilateral cleft lip and palate subjects was smaller than that of normal subjects, and the cleft side area was much smaller than the opposing side area. 4. There was no significant sexual difference in measurements of maxillary dental arch and palate of the unilateral cleft lip and palate subjects.