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, cilt.35, ss.837-841, 2006 (SCI İndekslerine Giren Dergi)

  • Cilt numarası: 35 Konu: 9
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.ijom.2006.03.001
  • Dergi Adı: INTERNATIONAL JOURNAL OF ORAL AND MAXILLOFACIAL SURGERY
  • Sayfa Sayısı: ss.837-841

Özet

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.