The Electrophoretic Deposition of Nano Al2O3 and AgNO3 on CpTi Dental Implant (An in vitro and in vivo study)


Background: Even the wide use of dental implants, still there is a proportion of implants are failed due to infection.Much considerable attention has been paid to modify the implant surface. Coating of dental implant with abiocomposite material of suitable properties can improve osseointegration. And this is the main concern of this study.The aim of present study was to evaluate the use of a biocomposite coating of dental implant with (ceramic nanoAl2O3 and metalic AgNo3) on the bond strength at bone – implant interface and tissue reaction.Materials and methods: A total number of forty-eight screws, CpTi dental implant used in this study. Half of thesescrews were coated with a biocomposite material of nano (Al2O3and AgNo3), this was done by using electrophoreticdeposition method (EFD). In invitro part of the study, analysis of the coated surface was done using: X ray diffraction(XRD), atomic force microscope (AFM), Energy Dispersive X-ray spectroscopy (EDX), Optical microscopy andScanning electron microscope (SEM). In invivo part of study, 10 white male New Zealand rabbits were used, and ascrew type of dental implant [uncoated and coated with nano (Al2O3and AgNo3)] were implanted in each tibia ofrabbit. Then biomechanical and Histological test were performed after 2 and 4 weeks healing intervals.Results: The results of biomechanical test showed a higher torque mean values of (M+SD):( ( +5.31) after 2 and 4 weeks respectively. In histological examination of coated screws at 2 weeks, there isabone trabeculae occupies a base of implant bed with osteoblast andosteocyte. At 4 weeks, there is a progress inthe healing process around dental implant, and this includes: -new bone with haversian canals, osteoblast andosteocyte.Conclusion: Biocomposite coating of dental implant with Alumina and silver nitrate can be made by electrophoreticdeposition method (EPD), and a multifunctional surface has been created