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Electrophoretic deposition of Hydroxyapatite on tapered Ti-6Al-7Nb dental implants: Biomechanical evaluation in rabbits | ||
| Journal of baghdad college of dentistry | ||
| Article 1, Volume 23, Issue 0, 2011, Pages 36-41 | ||
| Authors | ||
| Yaarob M. Salman; Raghdaa K. Jassim; Thair L. Al-Zubaydi | ||
| Abstract | ||
| Background: Advances in implant design have often focussed on altering the micro-topography and chemistry of the implant surface. This study was done to evaluate the effect of Hydroxyapatite (HA) coating on the bond strength between the bone and tapered screw-shaped Ti-6Al-7Nb dental implants. Materials and methods: Electrophoretic deposition technique (EPD) was used to obtain a uniform coating of Hydroxyapatite on the tapered Ti-6Al-7Nb screws. Structural investigations were carried out on the HA coating surface of the Ti.6Al.7Nb alloy using X-ray diffraction (XRD). The in vivo studies were performed by the implantation of tapered screw-shaped uncoated and coated implants in the tibia of white New Zealand rabbits. To understand the bone-implant interface, biomechanical test was carried out after 2, 6 and 18 weeks healing periods. Results: The XRD result shows that the ceramic layer consists of highly crystalline form of hydroxyapatite and the crystalline HA belong to characteristic peaks of (211) at 2Į 31.7o with the hexagonal symmetry. Biomechanical result shows that there was increased mechanical strength (torque value) of bone-implant interface with time, and the greater increase in the torque value was noticed between 6 and 18 weeks. Also the result shows that the tapered implant coated with HA have higher removal torque values than uncoated one in different time intervals. Conclusion: The electrophoretic deposition (EPD) is a good alternative coating technique for dental implant. HA coated implants demonstrate high torque value and early healing than uncoated implants, which is very important in early loading of the implant | ||
| Keywords | ||
| Electrophoretic Deposition; Hydroxyapatite; Tapered Dental Implants; torque | ||
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