Unilateral intraoral vertical ramus osteotomy and sagittal split ramus osteotomy for the treatment of asymmetric mandibles
이지호, 박태준, 전주홍,
소속 상세정보
이지호 ( Lee Jee-Ho ) - Asan Medical Center Department of Oral and Maxillofacial Surgery
박태준 ( Park Tae-Jun ) - Asan Medical Center Department of Oral and Maxillofacial Surgery
전주홍 ( Jeon Ju-Hong ) - Asan Medical Center Department of Oral and Maxillofacial Surgery
KMID : 0355620150410020102
Abstract
In surgery for facial asymmetry, mandibles can be classifiedinto two types, rotational and translational, according to the required mandibular move-ments for surgery. During surgery for rotational mandibular asymmetry, a bilateral sagittal split ramus osteotomy (BSSRO) may cause a large bone gap between the proximal and distal segments as well as condylar displacement, resulting in a relapse of the temporomandibular joint disorder, especially in severe cases. The intraoral vertical ramus osteotomy has an advantage, in this respect, because it causes less rotational displacement of the proximal segment on the deviated side and even displaced or rotated condylar segments may return to their original physiologic position. Unilateral intraoral vertical ramus osteotomy (UIVRO) on the short side combined with contralateral SSRO was devised as an alternative technique to resolve the spatial problems caused by conventional SSRO in cases of severe rotational asymmetry. A series of three cases were treated with the previously suggested protocol and the follow-up period was analyzed. In serial cases, UIVRO combined with contralateral SSRO may avoid mediolateral flaringof the bone segments and condylar dislocation, and result in improved condition of the temporomandibular joint. UIVRO combined with contralateral SSRO is expected to be a useful technique for the treatment of rotational mandibular asymmetry.
키워드
Facial asymmetry; Sagittal split ramus osteotomy; Temporomandibular joint disorders
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