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. 2017:2017:2785863.
doi: 10.1155/2017/2785863. Epub 2017 Nov 29.

Mechanical Characterisation and Biomechanical and Biological Behaviours of Ti-Zr Binary-Alloy Dental Implants

Aritza Brizuela-Velasco  1 , Esteban Pérez-Pevida  2 , Antonio Jiménez-Garrudo  1 , Francisco Javier Gil-Mur  3 , José María Manero  4 , Miquel Punset-Fuste  4 , David Chávarri-Prado  5 , Markel Diéguez-Pereira  6 , Francesca Monticelli  2
Affiliations

Mechanical Characterisation and Biomechanical and Biological Behaviours of Ti-Zr Binary-Alloy Dental Implants

Aritza Brizuela-Velasco et al. Biomed Res Int. 2017.

Abstract

The objective of the study is to characterise the mechanical properties of Ti-15Zr binary alloy dental implants and to describe their biomechanical behaviour as well as their osseointegration capacity compared with the conventional Ti-6Al-4V (TAV) alloy implants. The mechanical properties of Ti-15Zr binary alloy were characterised using Roxolid© implants (Straumann, Basel, Switzerland) via ultrasound. Their biomechanical behaviour was described via finite element analysis. Their osseointegration capacity was compared via an in vivo study performed on 12 adult rabbits. Young's modulus of the Roxolid© implant was around 103 GPa, and the Poisson coefficient was around 0.33. There were no significant differences in terms of Von Mises stress values at the implant and bone level between both alloys. Regarding deformation, the highest value was observed for Ti-15Zr implant, and the lowest value was observed for the cortical bone surrounding TAV implant, with no deformation differences at the bone level between both alloys. Histological analysis of the implants inserted in rabbits demonstrated higher BIC percentage for Ti-15Zr implants at 3 and 6 weeks. Ti-15Zr alloy showed elastic properties and biomechanical behaviours similar to TAV alloy, although Ti-15Zr implant had a greater BIC percentage after 3 and 6 weeks of osseointegration.

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Figures

Figure 1
Figure 1
Outline of the experimental workflow for the characterisation of the mechanical properties of the Ti-15Zr samples using ultrasound and an oscilloscope.
Figure 2
Figure 2
Modelled implant and abutment, lateral angle.
Figure 3
Figure 3
Final model for the finite element study.
Figure 4
Figure 4
Load conditions (i.e., magnitude and direction) tested.
Figure 5
Figure 5
Stress distribution in cortical bone, trabecular bone, and the TAV implant model.
Figure 6
Figure 6
Stress distribution in cortical bone, trabecular bone, and the Ti-15Zr implant model.
Figure 7
Figure 7
Mean BIC percentage achieved during osseointegration in an animal model of the TAV and Ti-15Zr implants after 3 and 6 weeks of healing.
Figure 8
Figure 8
Light microscopy image of stained sections of Ti-13Zr after 6 weeks of implantation.
Figure 9
Figure 9
Light microscopy image of stained sections of TAV after 6 weeks of implantation.
See this image and copyright information in PMC

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