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Customized mandibular reconstruction plates improve mechanical performance in a mandibular reconstruction model

: Gutwald, R.; Jaeger, R.; Lambers, F.M.

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Computer methods in biomechanics and biomedical engineering 20 (2017), No.4, pp.426-435
ISSN: 1025-5842
ISSN: 1476-8259
Journal Article, Electronic Publication
Fraunhofer IWM ()
mandibular reconstruction; sensitivity analysis; finite element analysis; fatigue testing; implant

The purpose of this paper was to analyze the biomechanical performance of customized mandibular reconstruction plates with optimized strength. The best locations for increasing bar widths were determined with a sensitivity analysis. Standard and customized plates were mounted on mandible models and mechanically tested. Maximum stress in the plate could be reduced from 573 to 393 MPa (−31%) by increasing bar widths. The median fatigue limit was significantly greater (p < 0.001) for customized plates (650 ± 27 N) than for standard plates (475 ± 27 N). Increasing bar widths at case-specific locations was an effective strategy for increasing plate fatigue performance.