Publisher DOI: 10.1016/j.jormas.2019.12.001
Title: Biomechanical comparison of polylactide-based versus titanium miniplates in mandible reconstruction in vitro
Language: English
Authors: Steffen, Claudius 
Sellenschloh, Kay 
Polster, Valerie-Sophie Amber 
Heyland, Mark 
Vollmer, Matthias 
Morlock, Michael 
Heiland, Max 
Huber, Gerd 
Rendenbach, Carsten 
Keywords: Biomechanics; Fatigue strength; Fibula free flap; Mandible reconstruction; Mechanical integrity; Polylactide
Issue Date: Sep-2020
Source: Journal of Stomatology, Oral and Maxillofacial Surgery 121 (4): 377-382 (2020-09)
Abstract (english): 
Objectives: Evaluation of the mechanical integrity and reliability of polylactide-based miniplates for osseous free flap fixation at the mandible in an experimental study setup of a mandible reconstruction model. Material and methods: 1.0 mm titanium miniplates (group TI) (MatrixMandible, DePuy Synthes, Umkirch, Germany) and 1.5 mm polylactide miniplates (group PL) (Inion CPS, Inion Oy, Tampere, Finland) were used to fix a polyurethane (PU) fibula segment to a PU mandible reconstruction model using monocortical non-locking screws. Mastication was simulated via unilateral cyclic dynamic loading at 1 Hz with increasing loads (+ 0.15 N/cycle, Bionix, MTS, USA). A 3D optical tracking system (Aramis, GOM, Braunschweig, Germany) was used to determine interosteotomy movements (IOM). Results: IOM were higher in the polylactide group (distal: P = 0.001, mesial: P = 0.001). Differences in mean stiffness (titanium: 478 ± 68 N/mm; polylactide: 425 ± 38 N/mm, P = 0.240) and mean force at a vertical displacement of 1.0 mm (titanium: 201.6 ± 87.1 N; polylactide: 141.3 ± 29.9 N, P = 0.159) were not significant. Conclusions: The results of this study suggest that polylactide-based miniplates provide reduced mechanical integrity and higher interosteotomy movements in comparison to titanium miniplates in vitro. Indications for clinical use of polylactide-based miniplates in mandible reconstruction have to be placed critically. Future studies will focus on clinical complications of polylactide-based plates in risk patients.
ISSN: 2468-7855
Journal: Journal of stomatology, oral and maxillofacial surgery 
Institute: Biomechanik M-3 
Document Type: Article
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