In vitro comparison of biomechanical characteristics of sagittal split osteotomy fixation techniques

Oezden B., Alkan A., Arici S., Erdem E.

INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY, vol.35, no.9, pp.837-841, 2006 (Peer-Reviewed Journal) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 9
  • Publication Date: 2006
  • Doi Number: 10.1016/j.ijom.2006.03.001
  • Journal Indexes: Science Citation Index Expanded, Scopus
  • Page Numbers: pp.837-841


The aim of the present study was to compare the biomechanical stability of 10 different fixation methods used in sagittal split osteotomy. Twenty-five fresh sheep mandibles were stripped of all soft tissues and sectioned at the midline. A sagittal split osteotomy with 5 mm advancement was performed on each hemimandible. The hemimandibles were randomly divided into 10 groups of 5, and then fixed with 5 different bicortical screws, 4 different miniplates with or without bicortical screws, and 1 resorbable screw configuration. All specimens were mounted on a specially designed 3-point biomechanical test model and compression loads were applied using the Lloyd LRX testing machine until 3 mm displacement was reached. Load/displacement data were gathered and compared using the Mann-Whitney U-test with Bonferroni correction (P < 0.01). The 3 bicortical screws in an inverted backward-L pattern provided the most biomechanical stability of the screw patterns tested. The miniplate fixed obliquely with 2 bicortical screws in the proximal segment provided the most biomechanical stability of the miniplate groups.