The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A STUDY OF THE FREQUENCY OF CONGENITAL MISSING AND SUPERNUMERARY TEETH IN CLEFT LIP AND PALATE PATIENTS

순구개열자의 선천결손치와 과잉치의 발생빈도에 관한 연구

  • Kang, Jong-Hwa (Department of Orthodontics, College of Dentistry, Pusan National University) ;
  • Kang, Jeung-Suk (Department of Orthodontics, College of Dentistry, Pusan National University) ;
  • Son, Woo-Sung (Department of Orthodontics, College of Dentistry, Pusan National University)
  • 강종화 (부산대학교 대학원 치의학과) ;
  • 강정숙 (부산대학교 치과대학 생화학교실) ;
  • 손우성 (부산대학교 치과대학 교정학교실)
  • Published : 1993.09.01
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Abstract

The purpose of this study was to evaluate the frequency of congenital missing teeth and supernumerary teeth in cleft patients. The subjects were divided into bilateral cleft lip and palate(BCLP), unilateral cleft lip and palate(UCLP) and cleft palate alone(CP alone) groups. 97 cleft patients(BCLP 15, UCLP 70, CP alone 12) between 6-20 years old were evaluated. Panorama film, Orthodontic chart and initial intraoral photogram were employed for this research. The obtained results were as follows. 1. The incidence of congenital missing teeth in total cleft samples was $57.7\%$, and the incidence of supernumerary teeth was $26.8\%$. Each incidence was higher than non-cleft. 2. The incidence of congenital missing teeth was the highest in BCLP and the lowest in CP alone. 3. The number of congenital missing teeth per perso was usually one, and the frequency was higher in the maxillary lateral incisors$(67.8\%)$, and maxillary second premolar$(14.9\%)$ than other teeth. 4. Most of tooth number anomalies in cleft patients were found in maxilla, especially adjacent region to the cleft site.

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