Maxillofacial Plastic and Reconstructive Surgery

Korean Association of Maxillofacial Plastic and Reconstructive Surgeons (대한악안면성형재건외과학회)
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THE EFFECT OF PRE-OPERATIVE MAXILLARY OCCLUSAL PLANE ANGLE TO POST-OPERATIVE SKELETAL STABILITY AFTER TWO-JAW SURGERY

수술 전 상악 교합평면각이 상하악 동시 수술 후 골격 안정성에 미치는 영향

  • Choi, Youn-Mo (Department of Oral & Maxillofacial Surgery, Dental College, Kyung-Hee University) ;
  • Ryu, Dong-Mok (Department of Oral & Maxillofacial Surgery, Dental College, Kyung-Hee University) ;
  • Oh, Jung-Hwan (Department of Oral & Maxillofacial Surgery, Dental College, Kyung-Hee University)
  • 최윤모 (경희대학교 치과대학 구강악안면외과학교실) ;
  • 류동목 (경희대학교 치과대학 구강악안면외과학교실) ;
  • 오정환 (경희대학교 치과대학 구강악안면외과학교실)
  • Published : 2007.03.31
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Abstract

The purpose of this study was to evaluate the effects of maxillary occlusal plane angle to postoperative skeletal stability by comparative analysis after two-jaw surgery of patients with skeletal CIII malocclusion. This study was made with lateral cephalometric radiography of 52 patients with skeletal class III malocclusion that were performed to Le Fort I osteotomy and BSSRO. And 52 patients were divided to Group A(n=30) and B(n=22). Maxillary posterior impaction was not conducted in Group A, which the pre-operative maxillary occlusal plane angle was in a normal range, and for Group B, which the pre-operative maxillary occlusal plane was low, the maxillary posterior impaction was conducted. The results were obtained as follows : 1. The relapse rate of Group A, which the pre-operative maxillary occlusal plane angle was in a normal range, was relatively stable compared to Group B, which the pre-operative maxillary occlusal plane was low. 2. The relapse rate of each measurement of Group B, which had the maxillary occlusal plane altered during the operation, was somewhat high, and of those, the post-operative relapse rate of overjet, overbite, mandibular plane angle appeared to be significantly high in the statistics. The analyzed results above, was thought to be indicating that the pre-operative maxillary occlusal plane angle was closely related to the post-operative skeletal stability, and that obtaining post-operative skeletal stability only through operative normalization of occlusal plane angle may meet limitations.

Keywords

References

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