Biomechanical evaluation of different angle-stable locking plate systems for mandibular surgery

Lieger, Olivier; Schaller, Benoît; Bürki, Alexander; Büchler, Philippe (2015). Biomechanical evaluation of different angle-stable locking plate systems for mandibular surgery. Journal of cranio-maxillo-facial surgery, 43(8), pp. 1589-1594. Elsevier 10.1016/j.jcms.2015.06.047

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PURPOSE To compare the initial stability and stability after fatigue of three different locking systems (Synthes(®), Stryker(®) and Medartis(®)) for mandibular fixation and reconstruction. METHOD Standard mandible locking plates with identical profile height (1,5 mm), comparable length and screws with identical diameter (2,0 mm) were used. Plates were fixed with six screws according a preparation protocol. Four point bending tests were then performed using artificial bone material to compare their initial stability and failure limit under realistic loading conditions. Loading of the plates was performed using of a servo hydraulic driven testing machine. The stiffness of the implant/bone construct was calculated using a linear regression on the experimental data included in a range of applied moment between 2 Nm and 6 Nm. RESULTS No statistical difference in the elastic stiffness was visible between the three types of plate. However, differences were observed between the systems concerning the maximal load supported. The Stryker and Synthes systems were able to support a significantly higher moment. CONCLUSION For clinical application all systems show good and reliable results. Practical aspects such as handling, possible angulation of screw fixation, possibility of screw/plate removal, etc. may favour one or the other plating system.

Item Type:

Journal Article (Original Article)


04 Faculty of Medicine > Department of Head Organs and Neurology (DKNS) > Clinic of Craniomaxillofacial Surgery
04 Faculty of Medicine > Pre-clinic Human Medicine > Institute for Surgical Technology & Biomechanics ISTB

UniBE Contributor:

Lieger, Olivier; Schaller, Benoît; Bürki, Alexander and Büchler, Philippe


600 Technology > 610 Medicine & health
500 Science > 570 Life sciences; biology
600 Technology > 620 Engineering








Philippe Büchler

Date Deposited:

17 Feb 2016 10:00

Last Modified:

18 Feb 2016 18:14

Publisher DOI:


PubMed ID:


Uncontrolled Keywords:

Fracture osteosynthesis; Internal fixation device; Internal fracture fixation; Jaw fixation techniques; Locking screw/plates; Mandible




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