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Early osseointegration of implants with cortex-like TiO2 coatings formed by micro-arc oxidation: A histomorphometric study in rabbits.

Identifieur interne : 000119 ( Main/Exploration ); précédent : 000118; suivant : 000120

Early osseointegration of implants with cortex-like TiO2 coatings formed by micro-arc oxidation: A histomorphometric study in rabbits.

Auteurs : Hong-Zhi Zhou [République populaire de Chine] ; Ya-Da Li [République populaire de Chine] ; Lin Liu [République populaire de Chine] ; Xiao-Dong Chen [République populaire de Chine] ; Wei-Qiang Wang [République populaire de Chine] ; Guo-Wu Ma [République populaire de Chine] ; Yu-Cheng Su [République populaire de Chine] ; Min Qi [République populaire de Chine] ; Bin Shi [République populaire de Chine]

Source :

RBID : pubmed:28224420

Descripteurs français

English descriptors

Abstract

In our previous studies, a novel cortex-like TiO2 coating was prepared on Ti surface through micro-arc oxidation (MAO) by using sodium tetraborate as electrolyte, and the effects of the coating on cell attachment were testified. This study aimed to investigate the effects of this cortex-like MAO coating on osseointegration. A sand-blasting and acid-etching (SLA) coating that has been widely used in clinical practice served as control. Topographical and chemical characterizations were conducted by scanning electron microscopy, energy dispersive X-ray spectrometer, X-ray diffraction, contact angle meter, and step profiler. Results showed that the cortex-like coating had microslots and nanopores and it was superhydrophilic, whereas the SLA surface was hydrophobic. The roughness of MAO was similar to that of SLA. The MAO and SLA implants were implanted into the femoral condyles of New Zealand rabbits to evaluate their in-vivo performance through micro-CT, histological analysis, and fluorescent labeling at the bone-implant interface four weeks after surgery. The micro-CT showed that the bone volume ratio and mean trabecular thickness were similar between MAO and SLA groups four weeks after implantation. Histological analysis and fluorescent labeling showed no significant differences in the bone-implant contact between the MAO and SLA surfaces. It was suggested that with micro/nanostructure and superhydrophilicity, the cortex-like MAO coating causes excellent osseointegration, holding a promise of an application to implant modification.

DOI: 10.1007/s11596-017-1705-0
PubMed: 28224420


Affiliations:


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<div type="abstract" xml:lang="en">In our previous studies, a novel cortex-like TiO
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