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Rubens Spin-Neto

In vitro biomechanical comparison of six different fixation methods following 5-mm sagittal split advancement osteotomies

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  • Y Oguz, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Baskent University, Ankara, Tyrkiet
  • E R Watanabe, Division of Oral and Maxillofacial Surgery, Dental School of Araraquara, Sâo Paulo State University – UNESP, Araraquara, Sâo Paulo, Brasilien
  • J M Reis, Department of Prosthodontics, Dental School of Araraquara, Sâo Paulo State Unive, Brasilien
  • Rubens Spin-Neto
  • M A Gabrielli, Division of Oral and Maxillofacial Surgery, Dental School of Araraquara, Sâo Paulo State University – UNESP, Araraquara, Sâo Paulo, Brasilien
  • V A Pereira-Filho, Division of Oral and Maxillofacial Surgery, Dental School of Araraquara, Sâo Paulo State University – UNESP, Araraquara, Sâo Paulo, Brasilien

The sagittal split ramus osteotomy (SSRO) is a surgical technique used widely to treat many congenital and acquired mandibular discrepancies. Stabilization of the osteotomy site and the potential for skeletal relapse after the procedure are still major problems. The aim of this study was to compare the mechanical stability of six methods of rigid fixation in SSRO using a biomechanical test model. Sixty polyurethane replicas of human hemimandibles were divided into six groups. In group I, the osteotomies were fixed with two four-hole titanium miniplates; in group II, with one four-hole miniplate; in group III, with one four-hole miniplate+a bicortical screw; in group IV, with a grid miniplate; in group V, with a four-hole locking miniplate; and in group VI, with a six-hole miniplate. A linear load in the premolar region was applied to the hemimandibles. The resistance forces (N) needed to displace the distal segment by 1, 3, and 5mm were recorded and the data transmitted from the load cell to a computer. One-way analysis of variance with Tukey's post hoc test was performed to compare the means between groups. For the three displacement conditions, there was a strong tendency for the 2.0-mm plate+screw and the grid plate to have higher values.

OriginalsprogEngelsk
TidsskriftInternational Journal of Oral and Maxillofacial Surgery
Vol/bind44
Sider (fra-til)984-988
Antal sider5
ISSN0901-5027
DOI
StatusUdgivet - 31 mar. 2015

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