Biomimetic Deposition of Hydroxyapatite Layer on Titanium Alloys.

Madalina Simona Baltatu,Gabriela Ciobanu,Marcin Nabialek,Petrica Vizureanu,Andrei Victor Sandu

doi:10.3390/mi12121447

Madalina Simona Baltatu, Gabriela Ciobanu + Show 3 more

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https://doi.org/10.3390/mi12121447

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Abstract

Over the last decade, researchers have been concerned with improving metallic biomaterials with proper and suitable properties for the human body. Ti-based alloys are widely used in the medical field for their good mechanical properties, corrosion resistance and biocompatibility. The TiMoZrTa system (TMZT) evidenced adequate mechanical properties, was closer to the human bone, and had a good biocompatibility. In order to highlight the osseointegration of the implants, a layer of hydroxyapatite (HA) was deposited using a biomimetic method, which simulates the natural growth of the bone. The coatings were examined by scanning electron microscopy (SEM), X-ray diffraction (XRD), micro indentation tests and contact angle. The data obtained show that the layer deposited on TiMoZrTa (TMZT) support is hydroxyapatite. Modifying the surface of titanium alloys represents a viable solution for increasing the osseointegration of materials used as implants. The studied coatings demonstrate a positive potential for use as dental and orthopedic implants.

Highlights

The main disadvantages of implants are determined by the nature, mode of synthesis and different physical and chemical properties of the materials used in relation to living tissues, such as: the ability to change its structure and properties according to the demands it supports or self-healing ability [3,4]
Alloys present coarse grained, grained, lamellar lamellarmicrostructures microstructureswith withlarge largeβ-grains β-grains and a lamellar matrix of coarse and a lamellar matrix of alalternating α and β. This type of lamellar structure is specific to titanium alloys depending ternating α and β
This type of lamellar structure is specific to titanium alloys contain a large amount of beta on the percentage of beta stabilizing elements

Summary

Introduction

The recent focus of research is on biocompatible materials, which are artificial products that have been imposed by the needs of people, affected by disease or accident, to improve health, leading to increased life expectancy [1]. The main issue is the way the body accepts these materials, or biocompatibility [2]. The main disadvantages of implants are determined by the nature, mode of synthesis and different physical and chemical properties of the materials used in relation to living tissues, such as: the ability to change its structure and properties according to the demands it supports (mechanical loading for bone tissue or blood flow for blood vessels) or self-healing ability [3,4]. Not all Ti combinations meet the prerequisites for biomedical applications. This has prompted the improvement of another collection of

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