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Time-dependent in silico modelling of orthognathic surgery to support the design of biodegradable bone plates
- Source :
- Journal of the Mechanical Behavior of Biomedical Materials, Zaguán. Repositorio Digital de la Universidad de Zaragoza, instname, Zaguán: Repositorio Digital de la Universidad de Zaragoza, Universidad de Zaragoza
- Publication Year :
- 2021
-
Abstract
- Orthognathic surgery is performed to realign the jaws of a patient through several osteotomies. The state-of-the-art bone plates used to maintain the bone fragments in place are made of titanium. The presence of these non-degradable plates can have unwanted side effects on the long term (e.g. higher infection risk) if they are not removed. Using a biodegradable material such as magnesium may be a possible solution to this problem. However, biodegradation leads to a decrease of mechanical strength, therefore a time-dependent computational approach can help to evaluate the performance of such plates. In the present work, a computational framework has been developed to include biodegradation and bone healing algorithms in a finite element model. It includes bone plates and the mandible, which are submitted to masticatory loads during the early healing period (two months following the surgery). Two different bone plate designs with different stiffnesses have been tested. The stiff design exhibited good mechanical stability, with maximum Von Mises stress being less than 40% of the yield strength throughout the simulation. The flexible design shows high stresses when the bone healing has not started in the fracture gaps, indicating possible failure of the plate. However, this design leads to a higher bone healing quality after two months, as more cartilage is formed due to higher strains exerted in fracture gaps. We therefore conclude that in silico modelling can support tuning of the design parameters to ensure mechanical stability and while promoting bone healing.
- Subjects :
- Materials science
medicine.medical_treatment
Finite Element Analysis
Biomedical Engineering
Orthognathic surgery
02 engineering and technology
Bone healing
Biomaterials
03 medical and health sciences
Fracture Fixation, Internal
0302 clinical medicine
Bone plate
medicine
von Mises yield criterion
Humans
Computer Simulation
Cartilage
Orthognathic Surgery
Mandible
030206 dentistry
021001 nanoscience & nanotechnology
Finite element method
Biomechanical Phenomena
medicine.anatomical_structure
Mechanics of Materials
Fracture (geology)
Stress, Mechanical
0210 nano-technology
Bone Plates
Biomedical engineering
Subjects
Details
- ISSN :
- 17516161
- Database :
- OpenAIRE
- Journal :
- Journal of the Mechanical Behavior of Biomedical Materials
- Accession number :
- edsair.doi.dedup.....24c5d0c8ce2067c0803a35017a95874a
- Full Text :
- https://doi.org/10.1016/j.jmbbm.2021.104641