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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparative Biomechanical and Photoelastic Evaluation of Different Fixation Techniques of Sagittal Split Ramus Osteotomy in Mandibular Advancement

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Loureiro Sato, Fabio Ricardo [1] ; Asprino, Luciana [1] ; Consani, Simonides [2] ; de Moraes, Marcio [3]
Total Authors: 4
[1] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Oral & Maxillofacial Surg, BR-13414903 Sao Paulo - Brazil
[2] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Dept Dent Mat, BR-13414903 Sao Paulo - Brazil
[3] Univ Estadual Campinas, UNICAMP, Piracicaba Dent Sch, Postgrad Program Oral & Maxillofacial Surg, BR-13414903 Sao Paulo - Brazil
Total Affiliations: 3
Document type: Journal article
Source: JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY; v. 68, n. 1, p. 160-166, JAN 2010.
Web of Science Citations: 35

Purpose: The aim of the present study was to comparatively evaluate the resistance and tension areas created after load incidence in different varieties of sagittal split ramus osteotomy fixation techniques. Materials and Methods: Fifty synthetic polyurethane hemimandible replicas were subjected to linear loading tests to evaluate 4 fixation techniques of the sagittal split ramus osteotomy using 2-mm system plates and screws. The hemimandibles were fixed with three 90 degrees linear screws, three 60 degrees linear screws, 3 screws in a reversed L arrangement, and one titanium miniplate. Each group was subjected to linear loading using an Instron 4411 servohydraulic mechanical testing unit. The load peak value and peak displacement were measured. Another 4 hemimandible replicas were made of photoelastic resin and subjected to photoelastic analysis after linear loading with a 3-mm displacement. Results: The results of the mechanical tests showed statistically significant differences between the fixation groups. The linear 90 degrees fixation and the reversed L arrangement presented with greater loading resistance, followed by the linear 60 degrees fixation and miniplates. In relation to the stress distribution in the photoelastic analysis, the fringes were concentrated near the osteotomy and to the lower part of the mandible in the linear 90 degrees-screw system and reversed L arrangement. In the case of the linear 60 degrees screws, most fringes were located around and between the screws. In the case of the miniplates, the fringes were concentrated around the screws near the osteotomy and more distally. Conclusion: Under the conditions tested, the linear 90 degrees and reversed L arrangements provided the most favorable behavior. (C) 2010 American Association of Oral and Maxillofacial Surgeons J Oral Maxillofac Surg 68:160-166, 2010 (AU)

FAPESP's process: 06/54109-0 - A comparative biomechanical and photoelastic evaluation of different fixation techniques of sagital spit ramus osteotomy in mandibular advancement
Grantee:Fabio Ricardo Loureiro Sato
Support Opportunities: Scholarships in Brazil - Master