측모 골격형태에 따른 미소 시 정면 입술형태의 변화에 대한 연구 = Frontal smile analysis in regard to lateral maxillomandibular relationship of Korean adult populations

다국어 초록 (Multilingual Abstract)

This retrospective study was to evaluate the difference in the variation of the factors to assess the smile from the frontal view depending on the vertical skeletal pattern classification of patients based on lateralcephalogram and evaluate any tendency to changes in factors influencing the smile depending on the vertical skeletal pattern.
Resting and smiling clinical pictures of in frontal view and lateralcephalogram of 92 Class I malocclusion patients were analyzed. Patients were classified as hypodivergent/neutral/hyperdivergent skeletal pattern groups according to the facial height ratio and gonial angle. To evaluate the factors the change when smiling, maxillary incisor display, maxillary incisor edge to lower lip, interlabial gap, buccal corridor, ratio of the lip length change, lip thickness change, intercommissural width change were measured.
There was a difference in the lip thickness ratio and intercommissural width ratio in all three groups. The more vertically divergent the patients profile was, the smaller lip thickness change between resting and smiling was. Considering the intercommissural width ratio, the less vertically divergent the patients profile was, the more the commissure had vitalized transversely and cracked a broader smile.
When diagnosing and establishing a treatment plan for the patients smile improvement, differences of the change in the lip thickness and intercommissural width when smiling along the vertical divergence in lateralcephalogram should be considered.

목차 (Table of Contents)

• I. 서 론
• II. 연구 대상 및 연구 방법
• 1. 연구대상
• 2. 측모두부방사선사진 및 임상사진 촬영
• 3. 수직적 안모형태에 따른 환자군 분류
• 4. 계측 항목
• 5. 측정 및 비교항목
• 6. 통계처리
• III.결과
• IV.고찰
• V.결론