Assessment of sagittal split ramus osteotomy rigid internal fixation techniques using a finite element method

S. Albougha, K. Darwich, M. A. Darwich, Mhd Hassan Al Bogha

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

In this study, finite element analysis (FEA) was used to evaluate nine rigid internal fixation techniques for sagittal split ramus osteotomy. To achieve this, a computed tomography (CT) scan of a healthy patient was obtained and used to generate the geometry of a half-mandible. The geometries of bicortical screws, miniplates, and monocortical screws were designed and combined with the mandible in nine models simulating various techniques. Four models used bicortical screws in various arrangements and four used miniplates of various designs. One model represented a hybrid technique. A load of 500 N was applied to the posterior teeth and FEA was applied. The most stable techniques were the hybrid technique and a single straight miniplate, presenting the least displacement among all models. Bicortical screws, while presenting reasonable stability, showed high strain areas near the anterior ramus ridge, superoposterior to the screws, implying a risk of bone fracture in this area. On the other hand, the T-shaped and double Y-shaped miniplates were associated with high von Mises stresses that would impair their rigidity, especially where angles appeared in their designs. We recommend the use of a single straight miniplate because it provides sufficient stable fixation with minimal risks or disadvantages.

Original languageEnglish
Pages (from-to)823-829
Number of pages7
JournalInternational Journal of Oral and Maxillofacial Surgery
Volume44
Issue number7
DOIs
Publication statusPublished - Jul 1 2015

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Sagittal Split Ramus Osteotomy
Finite Element Analysis
Mandible
Bone Fractures
Tooth
Tomography

All Science Journal Classification (ASJC) codes

  • Oral Surgery
  • Otorhinolaryngology
  • Surgery
  • Medicine(all)

Cite this

Assessment of sagittal split ramus osteotomy rigid internal fixation techniques using a finite element method. / Albougha, S.; Darwich, K.; Darwich, M. A.; Al Bogha, Mhd Hassan.

In: International Journal of Oral and Maxillofacial Surgery, Vol. 44, No. 7, 01.07.2015, p. 823-829.

Research output: Contribution to journalArticle

Albougha, S. ; Darwich, K. ; Darwich, M. A. ; Al Bogha, Mhd Hassan. / Assessment of sagittal split ramus osteotomy rigid internal fixation techniques using a finite element method. In: International Journal of Oral and Maxillofacial Surgery. 2015 ; Vol. 44, No. 7. pp. 823-829.
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