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Prosthetic framework improvement using lattice structure: A comparative finite element study of a mandibular
Samuel Lemaire1, Céline Bouby1, Frédéric Thiebaud1
1Université de Lorraine, CNRS, Arts et Métiers ParisTech, LEM3, Nancy, F-54500, France.
Journal of the Mechanical Behavior of Biomedical Materials
|April 12, 2024
Summary
A novel lattice prosthetic framework for edentulous mandibles, using four implants, mimics natural mandible movement and reduces strain. This offers a more biomechanically favorable alternative to conventional titanium frameworks.
Area of Science:
- Biomedical Engineering
- Dental Implantology
- Materials Science
Background:
- Prosthetic rehabilitation of the edentulous mandible often uses conventional bulk titanium frameworks.
- These frameworks can exhibit excessive stiffness, potentially impacting natural mandibular biomechanics.
- Optimizing prosthetic frameworks is crucial for improving patient outcomes in implant-supported restorations.
Purpose of the Study:
- To evaluate a novel prosthetic framework with a porous lattice structure for mandibular rehabilitation.
- To compare the mechanical behavior of this lattice framework against a conventional bulk titanium framework and a non-prosthetic mandible.
- To assess the impact of the prosthetic framework on mandibular kinematics and bone-implant interface strain during mastication.
Main Methods:
- Finite element analysis was performed on three models: non-prosthetic mandible, mandible with conventional titanium framework, and mandible with lattice framework.
- Physiological boundary conditions simulating masticatory muscle activity were applied.
- Numerical simulations analyzed global kinematics, bone-implant interface displacement, and strain during incisive clenching, maximum intercuspation, and unilateral molar clenching.
Main Results:
- The lattice prosthetic framework demonstrated mandibular kinematics closer to the natural, non-prosthetic mandible.
- Simulations revealed that the lattice framework resulted in strain values at the bone-implant interface within the physiological loading range.
- This suggests improved biomechanical compatibility compared to the conventional bulk titanium framework.
Conclusions:
- The lattice prosthetic framework is a promising alternative for the rehabilitation of the edentulous mandible.
- It offers a more biomechanically favorable solution by respecting natural mandibular kinematics and maintaining physiological strain levels.
- This approach may lead to enhanced long-term success and comfort for patients with implant-supported prostheses.
