title: In vitro comparison of biomechanical characteristics of sagittal split osteotomy fixation techniques.
abstract: 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 5mm 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 3mm 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.
authors: Department of Oral & Maxillofacial Surgery, Faculty of Dentistry, The University of Ondokuz Mayis, Samsun, Turkey. bora_ozdendt@yahoo.com
authors: B
authors: B
authors: Ozden
authors: A
authors: A
authors: Alkan
authors: S
authors: S
authors: Arici
authors: E
authors: E
authors: Erdem