Publisher DOI: 10.1016/j.jcms.2017.08.024
Title: CAD–CAM plates versus conventional fixation plates for primary mandibular reconstruction: A biomechanical in vitro analysis
Language: English
Authors: Rendenbach, Carsten 
Sellenschloh, Kay 
Gerbig, Lucca 
Morlock, Michael 
Beck-Broichsitter, Benedicta 
Smeets, Ralf 
Heiland, Max 
Huber, Gerd 
Hanken, Henning 
Issue Date: Nov-2017
Source: Journal of Cranio-Maxillofacial Surgery 11 (45): 1878-1883 (2017-11)
Journal or Series Name: Journal of cranio-maxillofacial surgery 
Abstract (english): Background CAD/CAM reconstruction plates have become a viable option for mandible reconstruction. The aim of this study was to determine whether CAD/CAM plates provide higher fatigue strength compared with conventional fixation systems. Material and methods 1.0 mm miniplates, 2.0 mm conventional locking plates (DePuy Synthes, Umkirch, Germany), and 2.0 mm CAD/CAM plates (Materialise, Leuven, Belgium/DePuy Synthes) were used to reconstruct a polyurethane mandible model (Synbone, Malans, CH) with cortical and cancellous bone equivalents. Mastication was simulated via cyclic dynamic testing using a universal testing machine (MTS, Bionix, Eden Prairie, MN, USA) until material failure reached a rate of 1 Hz with increasing loads on the left side. Results No significant difference was found between the groups until a load of 300 N. At higher loads, vertical displacement differed increasingly, with a poorer performance of miniplates (p = 0.04). Plate breakage occurred in miniplates and conventional locking plates. Screw breakage was recorded as the primary failure mechanism in CAD/CAM plates. Stiffness was significantly higher with the CAD/CAM plates (p = 0.04). Conclusion CAD/CAM plates and reconstruction plates provide higher fatigue strength than miniplates, and stiffness is highest in CAD/CAM systems. All tested fixation methods seem sufficiently stable for mandible reconstruction.
ISSN: 1010-5182
Institute: Biomechanik M-3 
Type: (wissenschaftlicher) Artikel
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