A comparative in vitro study on fixation of sagittal split osteotomies with Würzburg screws, Champy miniplates, and Biofix (biodegradable) rods
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J P Bouwman1, D B Tuinzing, P J Kostense
1Department of Oral and Maxillofacial Surgery, Kennemer Gasthuis, Haarlem, The Netherlands.
International Journal of Oral and Maxillofacial Surgery
|February 1, 1994
Abstract:
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).
