An in vitro comparison between two different designs of sagittal split ramus osteotomy

• 영문명: An in vitro comparison between two different designs of sagittal split ramus osteotomy
• 발행기관: 대한구강악안면외과학회
• 저자명: Valdir Cabral Andrade Leonardo Flores Luthi Fabio Loureiro Sato Leandro Pozzer Sergio Olate Jose Ricardo Albergaria-Barbosa
• 간행물 정보: 『대한구강악안면외과학회지』대한구강악안면외과학회지 제41권 제3호, 133~138쪽, 전체 6쪽
• 주제분류: 의약학 > 내과학
• 파일형태: PDF
• 발행일자: 2015.06.30

영문 초록

Objectives: To evaluate the influence of the type of osteotomy in the inferior aspect of the mandible on the mechanical performance. Materials and Methods: The study was performed on 20 polyurethane hemimandibles. A sagittal split ramus osteotomy (SSRO) was designed in 10 hemimandibles (group 1) with a vertical osteotomy in the buccal side (second molar level) and final osteotomy was performed horizontally on the lingual aspect, while the mandible body osteotomy was finalized as a straight osteotomy in the basilar area, perpendicular to the body. For group 2, the same osteotomy technique was used, but an oblique osteotomy was done in the basilar aspect of the mandibular body, forming continuity with the sagittal cut in the basilar area. Using a surgical guide, osteosynthesis was performed with bicortical screws using an inverted L scheme. In both groups vertical compression tests were performed with a linear load of 1 mm/min on the central fossa of the first molar and tests were done with models made from photoelastic resin. Data were analyzed using Student’s t-test, establishing a statistical significance when P<0.05. Results: A statistical difference was not observed in the maximum displacements obtained in the two osteotomies (P<0.05). In the extensiometric analysis, statistically significant differences were identified only in the middle screw of the fixation. The photoelastic resin models showed force dissipation towards the inferior aspect of the mandible in both SSRO models. Conclusion: We found that osteotomy of the inferior aspect did not influence the mechanical performance for osteosynthesis with an inverted L system

목차

I. Introduction

II. Materials and Methods

III. Results

IV. Discussion

V. Conclusion

키워드

Mandibular osteotomy Rigid internal fixation Sagittal split ramus osteotomy