하악 전돌 환자의 하악지 시상분할 골절단술 후의 골격성 회귀 양상 = Skeletal relapse pattern after sagittal split ramus osteotomy of mandibular prognathic patient

다국어 초록 (Multilingual Abstract)

The purpose of this study was to evaluate the skeletal relapse pattern of the mandibular prognathic patients after mandibular set back surgery by sagittal split ramus osteotomy. The horizontal and vertical position of the cephalometric points were measured before, after surgery and after one-year follow up period. The next, the positional change of the proximal and distal mandibular segment were evaluated respectively.
The obtained results were as follows :
1.The horizontal and vertical position of Cd was not changed before and after surgery, and it was maintained its original position during the observation periods.
2.As the mandibular prognathism of the patients was severe before surgery, the more skeletal relapse tendency was observed during follow-up period(p＜0.05).
3.As the horizontal positional change of the mandible which was obtained by mandibular set-back surgery was large, the more horizontal relapse tendency was observed during follow-up period(p＜0.05).
4. The corpus axis angle decreased by sagittal split ramus osteotomy(p＜0.01), but it was kept its reoriented position during follow-up period.
5. During the follow-up period after mandibular set-back by sagittal split ramus osteotomy, the forward relapse of mandible correlated with not only the forward rotation of the proximal segment but also the forward movement of the distal segment(p＜0.05).

목차 (Table of Contents)

• Ⅰ.서론
• Ⅱ.연구 대상 및 방법
• 1.연구 대상
• 2.연구 방법
• 3.통계처리
• Ⅲ.연구결과
• 1.악교정 수술에 의한 위치변화
• 2.관찰기간 동안의 위치변화
• 3.계측점의 술전 위치와 술후 관찰기간 동안의 계측점 위치 변화량의 상관관계
• 4.계측점의 수술 전·후 변화량과 술후 관찰기간 동안의 변화량의 상관관계
• 5.술후 관찰기간 동안의 각 계측점의 위치 변화량간의 상관관계
• Ⅳ.총괄 및 고안
• Ⅴ.결론
• 참고문헌