Effects of zinc-substituted nano-hydroxyapatite coatings on bone integration with implant surfaces.
J Zhejiang Univ Sci B
; 14(6): 518-25, 2013 Jun.
Article
en En
| MEDLINE
| ID: mdl-23733429
OBJECTIVE: The purpose of this study was to investigate the effects of a zinc-substituted nano-hydroxyapatite (Zn-HA) coating, applied by an electrochemical process, on implant osseointegraton in a rabbit model. METHODS: A Zn-HA coating or an HA coating was deposited using an electrochemical process. Surface morphology was examined using field-emission scanning electron microscopy. The crystal structure and chemical composition of the coatings were examined using an X-ray diffractometer (XRD) and Fourier transform infrared spectroscopy (FTIR). A total of 78 implants were inserted into femurs and tibias of rabbits. After two, four, and eight weeks, femurs and tibias were retrieved and prepared for histomorphometric evaluation and removal torque (RTQ) tests. RESULTS: Rod-like HA crystals appeared on both implant surfaces. The dimensions of the Zn-HA crystals seemed to be smaller than those of HA. XRD patterns showed that the peaks of both coatings matched well with standard HA patterns. FTIR spectra showed that both coatings consisted of HA crystals. The Zn-HA coating significantly improved the bone area within all threads after four and eight weeks (P<0.05), the bone to implant contact (BIC) at four weeks (P<0.05), and RTQ values after four and eight weeks (P<0.05). CONCLUSIONS: The study showed that an electrochemically deposited Zn-HA coating has potential for improving bone integration with an implant surface.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Zinc
/
Oseointegración
/
Durapatita
/
Sustitutos de Huesos
/
Materiales Biocompatibles Revestidos
/
Nanopartículas
Límite:
Animals
Idioma:
En
Revista:
J Zhejiang Univ Sci B
Asunto de la revista:
BIOLOGIA
/
MEDICINA
Año:
2013
Tipo del documento:
Article
País de afiliación:
China
Pais de publicación:
China