ABSTRACT
PURPOSE: Various surface treatments are developed and adopted to get a biological fixation by the osseointegration. An anodizing treatment, used on the surface treatment of aluminium, is applied to the surface treatment of the dental implant recently. The purpose of this study was to determine the biocompatibility and osseointegration of the titanium-base alloys according to 4 different surface treatments. MATERIALS AND METHODS: Cylindrical rods were made of titanium-base alloys, and treated with machining, grit-blasted, anodizing, and plasma spray as four groups. The rods were implanted into the femur of the 8 adult dogs. Two dogs were allocated as controls. At the postoperative 1month and 9months, the histological and push-out test was done. RESULTS: No specific systemic reactions in terms of complete blood cell count, blood chemistry, urinalysis were observed. There were no tissue necrosis, foreign body reaction, and inflammatory response to the implanted rods on the histological findings. A load-displacement curve was recorded to compare an interfacial shear strength between bone and metal, the values of the grit-blasted, anodizing, and plasma-spray groups were larger than that of machining group (p0.05). CONCLUSION: The surface treatment with anodizing would be options for artificial joint because of its lower manufacturing price and excellent biomechanical and osseointegration nature.
Subject(s)
Adult , Animals , Dogs , Humans , Alloys , Blood Cell Count , Dental Implants , Femur , Foreign-Body Reaction , Joints , Necrosis , Osseointegration , Plasma , Shear Strength , UrinalysisABSTRACT
Objective To study anti-radiation behavior of plasma sprayed boron carbide coatings. Methods The anti-radiation capacity of 16Mn steel which was coated with 0.1 mm plasma sprayed boron carbide were studied. The irradiation beams were 6,10,15 MY X-ray and 6,9,12,15 MeV electron emitted by accelerator, X-ray emitted by 60Co machine,fast neutron, and X-ray emitted by kilovoltage X-ray ma-chine. Results Anti-radiation capacity of plasma sprayed boron carbide coatings was not found for X-ray beams emitted by accelerator and 60Co machine. For electron beams,the anti-radiation capacity were found. The deeper of location, the stronger was anti-radiation. However, the anti-radiation capacity was not good. For fast neutron,the anti-radiation capacity was good. For X-ray emitted by kilovoltage X-ray machine,the anti-radiation was good,and only 0.1 nun plasma sprayed boron carbide had 15% attenuation. Conclusions The plasma sprayed boron carbide coatings have the anti-radiation capacity for X-ray emitted by kilovoltage X-ray machine in medical field.