A comparative in vitro study on fixation of sagittal split osteotomies with Würzburg screws, Champy miniplates, and Biofix (biodegradable) rods.
A bilateral sagittal split osteotomy was performed on seven fresh cadaver mandibles. Three different systems of fixation were mechanically tested on 14 sites. Tensile diagrams were obtained in which the (offset-) yield point was measured. This resulted in mean yield stresses of 199 N for bi-cortical self-tapping screws (n = 6), 49 N for miniplates with monocortical screws (n = 5), and 113 N for bi-cortical biodegradable rods (n = 3).
Bouwman
J P
JP
Department of Oral and Maxillofacial Surgery, Kennemer Gasthuis, Haarlem, The Netherlands.
Tuinzing
D B
DB
Kostense
P J
PJ
D000704:Analysis of Variance; D001673:Biodegradation, Environmental; D001860:Bone Plates; D001863:Bone Screws; D006801:Humans; D016268:Internal Fixators; D008334:Mandible / Q000601:surgery*; D010027:Osteotomy / Q000379:methods*; D013223:Statistics as Topic