Relapse of the mandible after three-dimensional repositioning and fixation of external fragments of the mandibular ramus in sagittal split ramus osteotomy of the mandible.

SHINOHARA Chikashi, EGURO Setsuko, KASAHARA Shigeki, KAWAMURA Takuya, SHIBASAKI Yoshinobu, ONO Kosuke, NAKAMURA Atsushi, KUDOU Masato, MICHI Ken-ichi

doi:10.5794/jjoms.41.298

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Other Title

三次元的な下顎枝外側骨片復位・固定システムによる下顎後退術後の後戻りに関する研究

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Description

We have previously reported an exact three-dimensional repositioning technique for external ramus fragments in sagittal split ramus osteotomy using screw fixation. Eighteen patients with mandibular prognathism who underwent sagittal split ramus osteotomy were studied. In one-half of these cases, a circumferential wire fixation (circum group) was performed, and in the other half a screw fixation with this repositioning technique (screw group) was used. These cases were studied with regard to preoperative, postoperative and one-year postoperative changes in lateral roentogenographic cephalometry. The following results were obtained: 1. There was no clockwise rotation of external fragments in the screw group. 2. Internal fragments relapsed anteriorly in the circum, group. 3. At one-year postoperative follow-up, the mandibular length relapsed 15% in the circum group and 4 % in the screw group.<BR>It was suggested that this repositioning technique is effective for preventing postoperative relapse.

Journal

Japanese Journal of Oral and Maxillofacial Surgery

Japanese Journal of Oral and Maxillofacial Surgery 41 (4), 298-304, 1995

Japanese Society of Oral and Maxillofacial Surgeons

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CRID: 1390282681505849856

NII Article ID: 10006610966

NII Book ID: AN00189163

DOI: 10.5794/jjoms.41.298

ISSN: 21861579; 00215163

Web Site: https://search.jamas.or.jp/link/ui/1995233481

Text Lang: ja

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