Lee, Jee-Ho Han, Hyung-Seop Kim, Yu-Chan Lee, Jin-Yong Lee, Bu-Kyu 2024-01-20T00:31:14Z 2024-01-20T00:31:14Z 2021-09-05 2017-10 1010-5182 https://pubs.kist.re.kr/handle/201004/122202 Mg-Ca-Zn alloy has been suggested for the application of fixation materials during maxillofacial surgery. We investigated the stability of Mg-Ca-Zn alloy for clinical application during orthognathic surgery. The finite element model for the fixation of sagittal split ramus osteotomy was constructed. In the bicortical screw fixation of the mandible setback condition, the stress distributions of Mg-Ca-Za alloy, polylactic acid polymer, and titanium were evaluated using the virtual model with occlusal loading of 132 N. The deformations of the three different materials of fixation screw were observed according to masticatory force ranging from 132 to 1,000 N. When comparing the stress distribution placed on cortical bone between the polymer and magnesium alloy groups, the magnesium alloy screws could bear more stress, thereby decreasing the stress, which might be distributed to other biologic components, such as the condyle and cortical ramus of the mandible. Deformations of the screws according to functional load were minimal, and the deformation remained < 0.21 mm at the initial functional load of the mandible after surgery, regardless of materials used. The biodegradable magnesium alloy screw can bear more stress and decrease the detrimental effect on the stability of sagittal split ramus osteotomy setback surgery. (C) 2017 Published by Elsevier Ltd on behalf of European Association for Cranio-Maxillo-Facial Surgery. English CHURCHILL LIVINGSTONE INTERNAL-FIXATION TECHNIQUES SETBACK SURGERY BIOMECHANICAL EVALUATION MECHANICAL-PROPERTIES BITE FORCE BONE FRACTURES STRESS AND. Stability of biodegradable metal (Mg-Ca-Zn alloy) screws compared with absorbable polymer and titanium screws for sagittal split ramus osteotomy of the mandible using the finite element analysis model Article 10.1016/j.jcms.2017.06.015 1 JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY, v.45, no.10, pp.1639 - 1646 JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY 45 10 1639 1646 scie scopus 000413629700007 2-s2.0-85030096614 Dentistry, Oral Surgery & Medicine Surgery Dentistry, Oral Surgery & Medicine Surgery Article INTERNAL-FIXATION TECHNIQUES SETBACK SURGERY BIOMECHANICAL EVALUATION MECHANICAL-PROPERTIES BITE FORCE BONE FRACTURES STRESS AND. Magnesium screw Orthognathic surgery Internal fixation