Comparative Finite Element Analysis of the Biomechanical Stability of 2.0 Fixation Plates in Atrophic Mandibular Fractures

被引:44
作者
Vajgel, Andre [1 ]
Camargo, Igor Batista [1 ]
Willmersdorf, Ramiro Brito [2 ]
de Melo, Tiago Menezes [3 ]
Laureano Filho, Jose Rodrigues [4 ]
de Holanda Vasconcellos, Ricardo Jose [4 ]
机构
[1] Univ Pernambuco, PhD Program Oral & Maxillofacial Surg, Recife, PE, Brazil
[2] Univ Fed Pernambuco, Dept Mech Engn, Recife, PE, Brazil
[3] Univ Fed Pernambuco, Recife, PE, Brazil
[4] Univ Pernambuco, Recife, PE, Brazil
关键词
MINIPLATE OSTEOSYNTHESIS; INTERNAL-FIXATION; ANGLE FRACTURES; RIGID FIXATION; IN-VITRO; RECONSTRUCTION;
D O I
10.1016/j.joms.2012.09.019
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
Purpose: The objective of the present study was to conduct a computational, laboratory-based comparison of the biomechanical stability of 2.0 fixation locking plates with different profiles in Class III atrophic mandibular fractures using 3-dimensional finite element analysis. Materials and Methods: Three-dimensional finite element models simulating Class III atrophic mandibular fractures were constructed. The models were divided into 4 groups according to plate thickness (1.0, 1.5, 2.0, and 2.5 mm). Fractures were simulated in left mandibular bodies, and 3 locking screws were used on each side of each fracture for fixation. Bite forces of approximately 63 N were simulated in the incisor and molar regions of the mandibles in finite element models. Results: The level of compressive strain on the bone around the screw was within the physiological limit. No significant difference was observed in the displacement of bone segments in the fracture region. Von Mises stress was higher during simulated bites in the molar region for plates with thicknesses of 1.0 mm. Plate tension values were below the level required for permanent deformation or fracture in all models. The 2.5-mm-thick plate presented better biomechanical performance than all other plates. The 2.0-mm-thick plate also showed satisfactory results and adequate safety limits. Conclusion: Large-profile (2.0-mm-thick) locking plates showed better biomechanical performance than did 1.0- and 1.5-mm-thick plates and can be considered an alternative reconstruction plate for the treatment of Class III atrophic mandibular fractures. (C) 2013 American Association of Oral and Maxillofacial Surgeons J Oral Maxillofac Surg 71:335-342, 2013
引用
收藏
页码:335 / 342
页数:8
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