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Updated: Mar 29, 2026
11:51
An Improved Mechanical Testing Method to Assess Bone-implant Anchorage
Published on: February 10, 2014
16.0K
Effect of Internal Structural Design on Stress Distribution in 3D-Printed Subperiosteal Implants Under Mechanical
Ádám Vörös1, Balázs Lőrincz1, János Kónya2
1Department of Materials Science and Technology, Széchenyi István University, 9026 Győr, Hungary.
Bioengineering (Basel, Switzerland)
|March 28, 2026
Summary
Custom subperiosteal implants with internal perforations or lattice frameworks maintain structural integrity under high loads. These designs optimize stress distribution, offering viable alternatives for significant bone loss cases.
Area of Science:
- Biomaterials Engineering
- Mechanical Engineering
- Oral and Maxillofacial Surgery
Background:
- Significant bone loss often precludes conventional endosseous implants.
- Custom subperiosteal implants offer a solution for complex reconstructions.
- Investigating internal structural designs is crucial for optimizing implant performance.
Purpose of the Study:
- To evaluate the mechanical behavior of mandibular subperiosteal implants with varying internal structures.
- To assess the impact of internal design on deformation and stress distribution.
- To compare solid, relieved, perforated, and lattice framework designs.
Main Methods:
- Fabrication of four implant configurations using metal additive manufacturing.
- Mechanical testing including cyclic loading (500 cycles, ~326-350 N) and static high-load (2000 N).
- Evaluation using cone-beam computed tomography (CBCT) and finite element analysis (FEA).
Main Results:
- No measurable permanent deformation occurred in any implant configuration under tested loads.
- Stress concentrations were primarily observed at the implant-prosthetic interface.
- Lightweight designs (perforated, lattice) showed preserved global structural integrity.
Conclusions:
- Internal structural design significantly influences stress distribution in subperiosteal implants.
- Perforated and lattice internal designs maintain structural integrity under physiological and supra-physiological loads.
- Optimized internal designs can enhance the mechanical performance of custom subperiosteal implants.
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