Back to Search
Start Over
Biomechanical behavior of functionally graded S53P4 bioglass-zirconia dental implants: Experimental and finite element analyses
- Source :
- Journal of the mechanical behavior of biomedical materials. 120
- Publication Year :
- 2021
-
Abstract
- Objectives The aim of this work was to evaluate the biomechanical behavior of one-piece zirconia implants with a functionally graded bioglass (BG) layer as compared to monolithic zirconia and BG-coated implants, using the finite element method (FEM). Methods Zirconia disks were infiltrated with bioglass S53P4 and then morphologically inspected by scanning electron microscopy (SEM) followed by mechanical analyses on micro-indentation tests for further biomechanical validation using the finite element method (FEM). On modeling, zirconia dental implants anchored into mandibular bone were simulated on occlusal loading as recorded under mastication. Three types of implants were simulated: i) free of BG coating, ii) with 100 μm or 150 μm thick conventional BG coatings; and iii) with graded BG coatings involving 3 different chemical composition distributions. The stress state at both implant and bone were evaluated using the FEM. The mechanically-induced bone remodelling was analyzed through the bone strain results. Results Infiltration of BG into a zirconia structure resulted in a ∼100 μm thick layer with an exponential-like gradation of chemical composition and properties. Regarding the FEM calculations, the BG coating induced up to 30% decrease on stress in the implant body when compared to the monolithic zirconia implant. The gradient of chemical composition also improved the stresses’ distribution. The stresses distribution towards the BG-coatings were significantly high and could lead to failure. Stresses on the bone were recorded down to its strength threshold, with insignificant influence of the coating layer. The bone strain values on all models indicates further bone remodelling although BG-coated and BG-graded zirconia implants showed the highest strain magnitude that may enhance the mechanical stimulation for bone maintenance. Significance Graded BG-zirconia dental implants showed enhanced overall biomechanical behaviour as compared to the BG-coated or monolithic zirconia dental implants. Also, such biomechanical improvements noticed for the BG-graded system should be considered in combination with the well-known osseointegration benefits of bioactive glasses.
- Subjects :
- Dental Stress Analysis
Ceramics
Materials science
medicine.medical_treatment
Finite Element Analysis
Biomedical Engineering
02 engineering and technology
engineering.material
Functionally graded material
Osseointegration
law.invention
Biomaterials
Stress (mechanics)
03 medical and health sciences
0302 clinical medicine
Coating
law
medicine
Cubic zirconia
Composite material
Dental implant
Dental Implants
030206 dentistry
021001 nanoscience & nanotechnology
Biomechanical Phenomena
Mechanics of Materials
Bioactive glass
engineering
Implant
Stress, Mechanical
Zirconium
0210 nano-technology
Subjects
Details
- ISSN :
- 18780180
- Volume :
- 120
- Database :
- OpenAIRE
- Journal :
- Journal of the mechanical behavior of biomedical materials
- Accession number :
- edsair.doi.dedup.....94f1f127bb95a9a5cddfd58ffadbebae