Comparative evaluation of different fixation techniques for sagittal split ramus osteotomy in 10 mm advancements. Part two: Finite element analysis
| Autor: | Jose Ricardo de Albergaria-Barbosa, Sergio Olate, Eder Alberto Sigua-Rodriguez, Valentim Adelino Ricardo Barão, Paulo Hemerson de Moraes, Ricardo Armini Caldas, Douglas Rangel Goulart |
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| Rok vydání: | 2018 |
| Předmět: |
medicine.medical_treatment
Finite Element Analysis Osteotomy Sagittal Split Ramus Mandible Osteotomy Comparative evaluation 03 medical and health sciences Fixation (surgical) 0302 clinical medicine Sagittal Split Ramus Osteotomy medicine von Mises yield criterion Displacement (orthopedic surgery) Stress concentration Orthodontics business.industry 030206 dentistry Finite element method Jaw Fixation Techniques Biomechanical Phenomena Otorhinolaryngology 030220 oncology & carcinogenesis Surgery Stress Mechanical Oral Surgery business Bone Plates |
| Zdroj: | Journal of cranio-maxillo-facial surgery : official publication of the European Association for Cranio-Maxillo-Facial Surgery. 47(7) |
| ISSN: | 1878-4119 |
| Popis: | Purpose To evaluate three rigid, stable fixation methods for sagittal split ramus osteotomy (SSRO), using finite element analysis. The hypothesis is that a customized miniplate presents better stress concentration and distribution. Materials and methods A 3D model of a hemimandible was created, and a 10-mm-advancement SSRO was simulated and fixed as follows: 3-DCP group — one custom miniplate fixed by eight screws; 4-H2P group — two miniplates of four holes each, fixed by eight screws; and 6-H2P group — two miniplates of six holes each fixed by 12 screws. After a vertical loading of 100 N, the values for von Mises stress, modified von Mises stress, and maximum and minimum principal stresses were measured. Results The area of maximum principal stress was similar for the three groups — located in the upper miniplate, in the screw near the proximal segment osteotomy. The maximum von Mises stresses were 1580.4 MPa, 1005 MPa, and 977.56 MPa for the 3DCP, 4-H2P, and 6-H2P groups, respectively, showing an allowable displacement of 2.57 mm, 1.62 mm, and 1.52 mm for the 3DCP, 4-H2P, and 6-H2P groups, respectively. Conclusion The customized miniplate did not present better stress distribution than two commonly used types of fixation. Fixation with two straight miniplates, either with four or six holes, offers adequate resistance for 10 mm linear advancements. |
| Databáze: | OpenAIRE |
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