Compensatory changes of occlusal plane angles in relation to skeletal factors = 골격적 요소에 따른 교합평면 경사도의 보상적 변화

국문 초록 (Abstract)

본 연구는 정상교합군과 부정교합군의 교합평면경사도와 부정교합군의 치료 전후의 교합평면 경사도를 비교 분석함으로써 골격관계에 따른 교합평면의 치아 치조성 보상에 대하여 알아보고 교정치료 시 교합평면 설정의 기준을 마련하고자 61명의 정상교합자와 92명의 부정교합자의 치료 전후 측모 두부방사선사진을 분석하여 골격 관계에 따른 교합평면경사도를 비교하였다. 정상교합군은 전후방적 골격양상에 따라 골격성 Ⅰ급군, Ⅱ급군, Ⅲ급군으로 나누었으며, 수직적 골격양상에 따라서는 수평군, 정상군, 수직군으로 분류하였다. 각 군의 계측치를 일원 분산분석과 사후검정을 통해 분석하였고 치료전후의 변화는 paired t-test로 유의성 검정을 하였다.
본 연구의 결과는 다음과 같다.
1. 정상교합군과 부정교합군간의 비교에 있어 일정한 값을 보인 계측치는 AB평면에 대한 교합평면 경사도이었다.
2. 치료 후의 AB평면에 대한 교합평면 경사도는 Ⅱ급 골격관계에서는 증가하는 방향으로, Ⅲ급 골격관계에서는 감소하는 방향으로 정상교합군의 값에 근접하였다.
3. 정상교합군에서 AB평면에 대한 하악 교합평면 경사도는 Ⅰ급 골격 관계에서 91.7˚, Ⅱ급 골격 관계에서 88.8˚, Ⅰ격 관계에서는 93.5˚ 이었다.

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the compensatory changes of occlusal plane angle in relation to skeletal factors. Lateral cephalograms of 61 adults with normal occlusion and 92 adults with skeletal malocclusions were traced and measured to analyze skeletal factors and occlusal plane angles. In terms of horizontal relationships, the normal occlusion group and malocclusion group were classified into subgroups of skeletal Classes Ⅰ, Ⅱ and Ⅲ, while in terms of vertical relationships, each group was also classified into horizontal, average, and vertical subgroups. Some measurements were evaluated statistically by ANOVA and Post Hoc, and the others were reviewed by Paired t-tests. In this study, only the occlusal plane angle to AB plane did not show a significant difference between the normal occlusion group and malocclusion group. After treatment, the occlusal plane angle to the AB plane of the malocclusion group was approximated to that of normal occlusion group. The LOP to AB plane angle of the normal occlusion group was 91.7 in skeletal Class Ⅰ, 88.8 in skeletal Class Ⅱ, and 93.5 in skeletal Class Ⅲ.
This study was done to assess the treatment changes of the occlusal plane in the malocclusion group, and to draw a comparison with the normal occlusion group in order to present a reference to establish a new occlusal plane inclination.

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