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Related Experiment Video

Updated: Jun 16, 2026

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Quasistatic Mechanical Testing for Computer-Aided Design and Manufacturing Occlusal Veneers Cemented to Milled Dentin Analog Material

Published on: December 20, 2024

Mandibular Implants: A Metamaterial-Based Approach to Reducing Stress Shielding.

Jorn-Ids Heins^1,2, Bram B J Merema^1,2, Joep Kraeima^1,2

¹Department of Oral and Maxillofacial Surgery, University of Groningen, University Medical Center Groningen, Groningen, 9713 GZ, The Netherlands.

Advanced Healthcare Materials

|April 4, 2025

Summary

Porous gyroid metamaterial plates show promise for mandible reconstruction by reducing stress shielding and improving biomechanical stimulation near screws. However, their lower load-bearing capacity requires further validation in clinical studies.

Keywords:

Metamaterial implant mandible photoelasticity porous

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Area of Science:

Biomaterials Engineering
Orthopedic Biomechanics
Medical Device Design

Background:

Solid titanium reconstruction plates often lead to biomechanical complications like stress shielding and bone resorption.
These issues compromise the long-term success of mandible reconstructions.

Purpose of the Study:

To evaluate novel porous gyroid metamaterial designs for mandible reconstruction plates.
To compare their biomechanical performance against traditional solid titanium plates.

Main Methods:

Patient-specific metamaterial and solid titanium plates (Ti6Al4V) were designed and fabricated.
Photoelasticity experiments and finite element analysis (FEA) assessed stress distribution and shielding.
Mandible models were subjected to incremental loading (0-1000 N).

Main Results:

Metamaterial plates reduced stress concentrations in distant mandibular regions but increased stress near screws.
FEA confirmed improved load distribution with metamaterial designs (p = 0.003).
Metamaterial plates failed at 775 N, while solid plates withstood 1800 N.

Conclusions:

Metamaterial designs effectively mitigate stress shielding, enhancing local mechanical stimulation.
Despite lower load-bearing capacity, they may preserve bone integrity and prevent implant failure.
Further (pre-)clinical studies are needed to validate these findings.