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  4. Biomechanical comparison of polylactide-based versus titanium miniplates in mandible reconstruction in vitro
 
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Biomechanical comparison of polylactide-based versus titanium miniplates in mandible reconstruction in vitro

Publikationstyp
Journal Article
Date Issued
2020-09
Sprache
English
Author(s)
Steffen, Claudius  
Sellenschloh, Kay  
Polster, Valerie-Sophie Amber  
Heyland, Mark  
Vollmer, Matthias  
Morlock, Michael  
Heiland, Max  
Huber, Gerd  
Rendenbach, Carsten  
Institut
Biomechanik M-3  
TORE-URI
http://hdl.handle.net/11420/4266
Journal
Journal of stomatology, oral and maxillofacial surgery  
Volume
121
Issue
4
Start Page
377
End Page
382
Citation
Journal of Stomatology, Oral and Maxillofacial Surgery 121 (4): 377-382 (2020-09)
Publisher DOI
10.1016/j.jormas.2019.12.001
Scopus ID
2-s2.0-85076844741
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.
Subjects
Biomechanics
Fatigue strength
Fibula free flap
Mandible reconstruction
Mechanical integrity
Polylactide
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