The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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CEPHALOMETRIC STUDY ON THE NASO-PHARYAX AND ITS SURROUNDING STRUCTURE:

구호흡자의 비인두와 주위조직에 관한 두부방사선계측학적 연구

  • Lee, Seo Ku (Dept. of Orthodontics, Seoul National University) ;
  • Yang, Won Sik (Dept. of Orthodontics, Seoul National University)
  • 이서구 (서울대학교 치과대학 교정학교실) ;
  • 양원식 (서울대학교 치과대학 교정학교실)
  • Published : 1983.03.01
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Abstract

By observing the lateral cephalometric radiograms of the Naso-pharynx of the mouth breatheres with adenoid hyperplasia, orthodontists could use the 'discriminant function' as the supplementary diagnotic aid for the malocclusion cases with mouth bloating. The purpose of this study was to ustilize the 'discriminant function' as the indicator to remove the etiologic factor producing the relapse. The author used the 19 boys and 20 girls, who were the nasal-breathers with normal occlusion as the control group, and 16 boys and 20 girls, who were the mouth breathers with adenoid hypaplasia and malocclusion. The age of the both groups was ranged from 12ys to 15ys. Results were as following; 1. There was the difference in the bony structure of Naso-pharynx between the mouth-breathers nasal-breathers. 2. IMRA of the mouth breathers was smaller than the nasal breathers'. 3. The mouth-breathers had the skeletal open bite tendency. 4. Discriminant function: $$D_i=9.85374+ax_2+bx_4+cx_6+dx_7+ex_8$$ a = -0.1211273 b = 0.5908992 c = -1.508446 d = -1.541869 e = 1.404478.

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