The korean journal of orthodontics (대한치과교정학회지)

The Korean Association Of Orthodontists (대한치과교정학회)
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Changes in height and inclination of the articular eminence during the growth period

성장기에서 관절융기 높이 및 경사의 연령적 변화

  • Choi, Dong-Soon (Department of Orthodontics, College of Dentistry, Research Institute for Oral Science, Gangneung-Wonju National University) ;
  • Jang, In-San (Department of Orthodontics, College of Dentistry, Research Institute for Oral Science, Gangneung-Wonju National University) ;
  • Cha, Bong-Knen (Department of Orthodontics, College of Dentistry, Research Institute for Oral Science, Gangneung-Wonju National University)
  • 최동순 (강릉원주대학교 치과대학 교정학교실, 구강과학연구소) ;
  • 장인산 (강릉원주대학교 치과대학 교정학교실, 구강과학연구소) ;
  • 차봉근 (강릉원주대학교 치과대학 교정학교실, 구강과학연구소)
  • Received : 2010.09.15
  • Accepted : 2010.12.03
  • Published : 2010.12.31
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Abstract

Objective: The purpose of this study was to assess the changes in height and inclination of the articular eminence during the growth period. Methods: One hundred and sixty subjects (71 males and 89 females) with a normal skeletal pattern and TMJ function, ranging in age from 5.9 to 19.7 years were divided according to their chronological age into six groups. Lateral individualized corrected TMJ tomograms were taken of all subjects, and the height and inclination of the articular eminence were measured. UNIANOVA was used to compare the differences between the age groups. Mann-Whitney test was used to compare the differences between male and female subjects. Results: The height and the inclination of the articular eminence were increased and became steeper with age, and the height and the inclination were larger in male than in female subjects. Conclusions: Dynamic changes in the height and the inclination of the articular eminence were observed during the growth period, therefore a full understanding of the growth of the articular eminence is important for orthodontic and orthopedic treatment in this period.

관절융기의 높이와 후면의 경사는 교합과 긴밀한 관계를 유지하며 하악 운동 시 하악과두의 이동 경로를 결정하는 중요한 역할을 한다. 본 연구의 목적은 성장기 아동에서 연령별로 관절융기의 높이 및 경사의 변화를 평가하는 것이다. 양호한 골격을 보이는 5.9세부터 19.7세까지 총 160명(남자 71명, 여자 89명)의 대상자가 선정되었고, 이들의 측두하악관절 단층방사선사진에서 관절융기의 높이, 관절융기 후면의 경사가 측정되었다. 남녀 각각 9.0세 미만(Group 1), 9.0 - 10.9세(Group 2), 11.0 - 12.9세(Group 3) 13.0 - 14.9세(Group 4), 15.0 - 16.9세(Group 5), 17.0세 이상(Group 6)의 6군으로 나누었고, 그룹 간 비교를 위해 일변량분산분석, 남녀 간 비교를 위해 Mann-Whitney 검정을 실시하였다. 각 연령 그룹의 평균 관절융기 높이는 남자에서 4.8 mm, 6.1 mm, 6.4 mm, 7.0 mm, 8.0 mm, 9.2 mm 였고, 여자에서 4.8 mm, 5.4 mm, 6.4 mm, 6.9 mm, 7.6 mm, 7.1 mm 였다. 각 연령 그룹의 평균 관절융기 경사는 남자에서 $29.5^{\circ}$, $34.4^{\circ}$, $35.5^{\circ}$, $37.6^{\circ}$, $40.3^{\circ}$, $42.6^{\circ}$였고, 여자에서 $29.7^{\circ}$, $31.7^{\circ}$, $34.7^{\circ}$, $37.4^{\circ}$, $39.3^{\circ}$, $36.2^{\circ}$였다. 관절융기의 높이와 경사는 남자에서는 Group 5까지, 여자에서는 Group 4까지 유의성 있게 증가하였다. 남녀 간 비교에서는 Group 6에서만 남자가 여자보다 유의하게 컸다. 관절융기의 성장가속기는 여자가 남자보다 4년 가량 빨랐고, 남자는 여자보다 더 늦은 나이까지 성장하였다. 성장기 중 관절융기의 높이와 경사는 매우 많은 변화를 보였으며, 따라서 이 시기에 교정치료 시 기능적인 정상교합을 달성하기 위해서는 관절융기의 연령적 변화와 성장 양상을 이해하는 것이 중요하다고 생각한다.

Keywords

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