Three-dimensional finite element analysis of the stress distribution and displacement in different fixation methods of bilateral sagittal split ramus osteotomy
Journal of the Korean Association of Oral and Maxillofacial Surgeons
; : 271-275, 2012.
Article
em En
| WPRIM
| ID: wpr-29717
Biblioteca responsável:
WPRO
ABSTRACT
OBJECTIVES:
This study evaluated a range of fixation methods to determine which is best for the postoperative stabilization of a mandibular osteotomy using three-dimensional finite element analysis of the stress distribution on the plate, screw and surrounding bone and displacement of the lower incisors. MATERIALS ANDMETHODS:
The model was generated using the synthetic skull scan data, and the surface model was changed to a solid model using software. Bilateral sagittal split ramus osteotomy was performed using the program, and 8 different types of fixation methods were evaluated. A vertical load of 10 N was applied to the occlusal surface of the first molar.RESULTS:
In the case of bicortical screws, von-Mises stress on the screws and screw hole and deflection of the lower central incisor were minimal in type 2 (inverted L pattern with 3 bicortical repositioning screws). In the case of plates, von-Mises stress was minimal in type 8 (fixation 5 mm above the inferior border of the mandible with 1 metal plate and 4 monocortical screws), and deflection of the lower central incisor was minimal in types 6 (fixation 5 mm below the superior border of the mandible with 1 metal plate and 4 monocortical screws) and 7 (fixation 12 mm below the superior border of the mandible with 1 metal plate and 4 monocortical screws).CONCLUSION:
Types 2 and 6 fixation methods provide better stability than the others.Palavras-chave
Texto completo:
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Base de dados:
WPRIM
Assunto principal:
Crânio
/
Análise de Elementos Finitos
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Deslocamento Psicológico
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Osteotomia Sagital do Ramo Mandibular
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Osteotomia Mandibular
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Incisivo
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Mandíbula
Idioma:
En
Revista:
Journal of the Korean Association of Oral and Maxillofacial Surgeons
Ano de publicação:
2012
Tipo de documento:
Article