Skip to Main content Skip to Navigation
Theses

Compound coatings of Ca-phosphates and/ titanate on metallic implants for medical applications

Abstract : To combine the good mechanical properties of metallic substrate with the bioactivity of some ceramics, to obtain bioactive surface, a calcium phosphate (Ca-P) coating has been developed. The goal is to improve the biocompatibility and bioactivity of metallic implant and create a barrier against the possible release of toxic ions from the metallic substrate. Our approach has been to develop a new synthetic route. After mechanical polishing and chemical etching of the titanium or Ti-6Al-4V substrates, an interlayer of sodium titanate was obtained by an alkaline pretreatment of the substrates. Then, it was subjected to a heat treatment to create a nanometeric layer. The latter facilitates the growth of a layer of Ca-P by means of an electroless manner similar to the forming process of the natural bone. Characterization and study of Ca-P coatings obtained by the three baths (acids, alkalis and oxidizing) on metallic substrates have been made. The deposits were studied from a structural and morphological point of view. The stability of Ca-P layers was measured in simulated body fluid (SBF) for different periods using biochemical analyzes. In conclusion, this method is a cheap and reliable solution that can be used on an industrial scale. The Ca-P as well as the sodium titanate layers can afford to be impregnated with active agents such as one or more antibacterial agents.
Complete list of metadata

Cited literature [214 references]  Display  Hide  Download

https://tel.archives-ouvertes.fr/tel-00991949
Contributor : ABES STAR :  Contact
Submitted on : Friday, May 16, 2014 - 10:53:08 AM
Last modification on : Thursday, December 2, 2021 - 3:17:21 AM
Long-term archiving on: : Monday, April 10, 2017 - 11:13:36 PM

File

Ibrahim_Hadeer_2013_ED182.pdf
Version validated by the jury (STAR)

Identifiers

  • HAL Id : tel-00991949, version 1

Collections

Citation

Ibrahim Hadeer Ibrahim Mohamed. Compound coatings of Ca-phosphates and/ titanate on metallic implants for medical applications. Other [cond-mat.other]. Université de Strasbourg; Ǧāmiʿat͏̈ al-Qāhirat͏̈, 2013. English. ⟨NNT : 2013STRAE035⟩. ⟨tel-00991949⟩

Share

Metrics

Record views

242

Files downloads

1796