The Biocompatibility and Electrochemical Characteristics of HA, Ti, Ti/TiN, and Ti/TiN/HA Film-coated Sintered Stainless Steels for Dental Implant Materials' Use

The Biocompatibility and Electrochemical Characteristics of HA, Ti, Ti/TiN, and Ti/TiN/HA Film-coated Sintered Stainless Steels for Dental Implant Materials' Use
H.-C. CHOE, Y.-M. KO, J.-C. PARK, and B.-O. KIM, Chosun University, Gwangju, South Korea
2003
IADR
Objectives: The first factor to decide the success of dental implantation is sufficient osseointegration between on implant fixture and its surrounding bone tissue. In this study, in order to fabricate sintered dental implant, the effects of HA, Ti and TiN on corrosion and biocompatibility, cell toxicity, osseointegration of electroless Cu-plated and sintered stainless steel implant were investigated using various characteristics.
Methods: The surface characteristics of Ti, TiN, Ti/TiN, HA film coated sintered stainless steels(SSS) by EB-PVD method have been studied. Stainless steel compacts containing 2, 4, and 10 wt%Cu were prepared by electroless Cu-plating method. The specimens were coated with HA, Ti and TiN with few mm thickness respectively by EB-PVD method. The microstructures and phase analysis were conducted by using SEM. Biocompatibility were investigated in experimental dog. The corrosion behaviors were investigated using potentiosat in 0.9% NaCl solution and corrosion surface was observed using SEM and XPS.
Results: SSS containing 4wt% Cu showed good mechanical strength and has a good porosity for dental implant materials. Also it showed a good cell growth without toxicity. The HA and Ti/TiN/HA coated films showed fine columnar structure and a good corrosion and pitting resistance. And Ti/TiN/HA coated SSS containing 10wt% Cu had good resistance to pitting corrosion due to the formation of dense film on the surface. The HA and Ti/TiN/HA coated 4wt%Cu SSS showed a same corrosion and pitting resistance. The HA coated 4wt%Cu SSS is a good materials for dental implant without Ti/TiN/HA coating. HA coated 4wt% Cu sintered stainless steel showed a fast formation of bone rather than Ti, TiN, Ti/TiN/HA coated sintered stainless.
Conclusions: Results suggest that the best sintered dental implant material is HA coated 4 wt% Cu sintered SSS with a mechanical strength and biocompatibility. Supported by KOSEF No R01-2000-000-00102-0grant, South Korea hcchoe@kornet.net;ymgo@chosun.ac.kr