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Biomechanical and Photoelastic analysis of internal rigid fixation on sagittal osteotomy for mandibular advancement with conventional and locking screw/plate system

Grant number: 08/02075-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): August 01, 2008
Effective date (End): March 31, 2009
Field of knowledge:Health Sciences - Dentistry - Dental Clinics
Principal Investigator:Marcio de Moraes
Grantee:Mariana Camilo Negreiros Lyrio
Host Institution: Faculdade de Odontologia de Piracicaba (FOP). Universidade Estadual de Campinas (UNICAMP). Piracicaba , SP, Brazil


The most used surgical techniques in advancement jaw procedures is the sagittal split ramus osteotomy. Their studies have been started on 40th decade and it has been changed thru the years. Osteotomies fixation realized to correct facial deformities started by using wire and maxillomandibular fixation. Because of the development in the technique and materials on oral and maxillofacial surgery an internal rigid fixation was created. This technique is more resistance of masticatories forces promoving an increase in the stability after surgical and making needless the using of maxillomandibular fixation. In 70th decade the use of monocortical, bicortical screws, fixation plates and "lag screw" were started. Locking screw/plate titanium mocortical system offers more mechanical resistance. The stability to osteotomized pieces at orthognatic surgery is better than that promoved by others internal rigid fixation materials. However, there are just few studies about locking system on oral and maxillofacial surgery. The purpose of this study is make photoelastic and biomechanical analysis of internal rigid fixations, such as standart plates and locking screw/plate system. The way of this study is define the regions with more concentrated tension force when occlusal forces were applied. These study is a part of others similar studies that are be developing at oral and maxillofacial surgery area of Piracicaba Dental School of Unicamp.

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
LYRIO, Mariana Camilo Negreiros. Mechanical and photoelastic analysis of two methods of rigid internal fixation in mandfibular advancement. 2009. Master's Dissertation - Universidade Estadual de Campinas (UNICAMP). Faculdade de Odontologia de Piracicaba Piracicaba, SP.

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