Comparative evaluation of the sliding plate technique for fixation of a sagittal split ramus osteotomy: finite element analysis

• Published in: Oral surgery, oral medicine, oral pathology and oral radiology Vol. 123; no. 5; pp. e148 - e152
• Main Authors: Larson, Brent E., DDS, MS, Lee, Nam-Ki, DDS, MS, PhD, Jang, Moon-Jung, DDS, MS, Jo, Deuk-Won, DDS, MS, PhD, Yun, Pil-Young, DDS, MS, PhD, Kim, Young-Kyun, DDS, MS, PhD
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.05.2017
• Subjects: Bone Plates; Bone Screws; Dentistry; Finite Element Analysis; Humans; Imaging, Three-Dimensional; Osteotomy, Sagittal Split Ramus - methods; Radiographic Image Interpretation, Computer-Assisted; Stress, Mechanical; Surgery; Tomography, X-Ray Computed
• ISSN: 2212-4403; 2212-4411
• DOI: 10.1016/j.oooo.2016.11.016

Abstract Objective This study evaluated the stress distribution of the sliding plate (SP) and conventional miniplate (CM) fixation techniques of a sagittal split ramus osteotomy (SSRO) using three-dimensional (3D) finite element analysis. Study Design Four 3D finite element models according to the number and shape of screw holes in the plate were simulated and the von Mises stress was analyzed: SP with 2 round and 2 oval holes (SP-2R2O); SP with 2 round and 1 oval holes (SP-2R1O); CM with 4 round holes (CM-4R); and CM with 3 round holes (CM-3R). Results The fixation technique with CM-4R showed a better stress distribution than CM-3R, which in turn showed better results compared to the two different SPs. SP-2R2O showed the worst stress distribution in the bone and fixation components. Conclusions The results suggest that the SP-2R2O technique increases the stress distribution of the plate and screws, which may reduce the stability of fixation after SSRO.