The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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A CEPHALOMETRIC STUDY ON THE SOFT TISSUE PROFILE CHANGES BY ORTHODONTIC TREATMENT IN FEMALE PATIENTS

여자 부정교합자의 치료전후 연조직 측모 변화에 관한 두부 방사선학적 연구

  • Park, Sook-Kyu (Dept. of Orthodontics, College of Dentistry, Seoul National University) ;
  • Suhr, Cheong-Hoon (Dept. of Orthodontics, College of Dentistry, Seoul National University)
  • 박숙규 (서울대학교 치과대학 교정학교실) ;
  • 서정훈 (서울대학교 치과대학 교정학교실)
  • Published : 1991.03.01
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Abstract

This study was undertaken to investigate soft tissue profile changes by orthodontic treatment in female patients. Traditional cephalometric appraisal yields data of dubious scientific value, the soft tissue profile forms were evaluated by finite element method. The subject was divided into three groups according to Angle's classification and each group was composed of 25 female patients averaged aged 12-14 years at the start of treatment. The changes in soft tissue form were evaluated by computing the degree of distortion in each triangle after treatment compared with the triangle before treatment. The conclusions were as follows; 1. The soft tissue profile forms were evaluated by finite element method and independent evaluation of each element by local changes was possible. 2. Maximum and minimum principal strains showed marked variability depending on the particular finite element and each group and Class II, III sample was greater than Class I sample. 3. Soft tissue size changes as a result of orthodontic treatment was not related to those of shape. 4. Soft tissue changes by orthodontic treatment were variable in individual patient, and were not related to Angle's classification.

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