Immediate mechanical stability of sagittal split ramus osteotomy fixed with resorbable compared with titanium bicortical screws in mandibles of sheep

Cilasun U., UÇKAN İ. S., Dolanmaz D., Saglam H.

British Journal of Oral and Maxillofacial Surgery, vol.44, no.6, pp.534-537, 2006 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 44 Issue: 6
  • Publication Date: 2006
  • Doi Number: 10.1016/j.bjoms.2005.11.020
  • Journal Name: British Journal of Oral and Maxillofacial Surgery
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.534-537
  • Keywords: orthognathic surgery, PLLA/PGA, tension, stability, positional screw, titanium
  • Istanbul Medipol University Affiliated: Yes


Ten fresh mandibles from adult sheep were stripped of all soft tissues and sectioned in the midline. We did sagittal split osteotomies and 5 mm advancement on all the 20 hemimandibles. Ten hemimandibles were fixed with three 2.0 mm × 13 mm titanium bicortical screws, and the other 10 were fixed with three 2.0 mm × 13 mm poly-l-lactic acid/polyglycolic acid (PLLA/PGA) bicortical screws in an inverted L pattern. All the hemimandibles were then mounted in a servohydraulic testing unit and tested to permanent deformation. Maximum forces that the mandibles resisted before breaking, maximum displacements, and the displacement values under 20, 60, 120, and 150 N were compared using the Mann-Whitney U-test. There were no significant differences in stability between the bones fixed with titanium and those fixed with resorbable screws. © 2005 The British Association of Oral and Maxillofacial Surgeons.