Functionally graded bioactive glass coating on magnesia partially stabilized zirconia (Mg-PSZ) for enhanced biocompatibility |
| |
| Authors: | Mohamed N Rahaman Yadong Li B Sonny Bal Wenhai Huang |
| |
| Affiliation: | (1) Department of Materials Science and Engineering, University of Missouri, Rolla, MO 65409, USA;(2) School of Materials Engineering, Soochow University, Suzhou, 215021, China;(3) Department of Orthopaedic Surgery, University of Missouri, Columbia, MO 65212, USA;(4) Institute of Bioengineering and Information Technology Materials, Tongji University, Shanghai, 200092, China |
| |
| Abstract: | The coating of magnesia partially stabilized zirconia (Mg-PSZ) with a bioactive glass was investigated for enhancing the bioactivity
and bone-bonding ability of Mg-PSZ orthopedic implants. Individual coatings of three different bioactive glasses were prepared
by depositing a concentrated suspension of the glass particles on Mg-PSZ substrates, followed by sintering at temperatures
between 750 °C and 850 °C. Two silicate-based glass compositions (designated 13–93 and 6P68), and a borosilicate glass composition
(H12) were investigated. The microstructure and adhesive strength of the coatings were characterized, and the in vitro bioactivity
of the glasses was compared by measuring their conversion kinetics to hydroxyapatite in an aqueous phosphate solution at 37 °C.
The 6P68 glass provided the highest adhesive strength (40 ± 2 MPa) but showed very limited bioactivity, whereas the H12 glass
had lower adhesive strength (18 ± 2 MPa) but the highest bioactivity. A functionally graded coating, consisting of a 6P68
interfacial layer and an H12 surface layer, was developed to provide a coating with high adhesive strength coupled with rapid
in vitro bioactivity. |
| |
| Keywords: | |
| 本文献已被 PubMed SpringerLink 等数据库收录！ |
|
