关键词: Dental implants , · Surface treatment , · Sandblast , · Surface roughness , · Osseointegration

Abstract: In this study, diferent conditions of sandblasting on dental implant fxtures were investigated to achieve the best sandblasting conditions. 18 diferent sandblasting conditions (Using 152 implant fxture samples) were examined, including parameters such as particle size, particle blasting pressure, and particle blasting angle. The surface treatment of the samples was performed using the SLA+Anodizing method. AFM testing was performed for each of the 18 diferent states, and the average surface roughness of each of these was compared with each other. Then, a bone layer was placed on the sample with the closest average surface roughness to the standard and the least amount of aluminum oxide on its surface among the 18 different states, to confrm the accuracy and quality of the desired surface roughness by examining the bone formation process and speed. The results showed that state No. 4 (sandblast particle size: 75 μm, spraying pressure of sandblast particles: 4 bar, sandblast particle spraying angle: 30 degrees), which was prepared using the SLA+Anodizing method and had a surface roughness of 1.989 μm (The percentage of Al2O3 on the surface=6%), had the best sandblasting conditions and showed 95% cell viability and accelerated the treatment and bone formation process for about a week. The simulation results, using Abaqus software, indicated that the stress distribution on the surface of the implant fxture in contact with the bone surface has increased by approximately 4.3% for state No. 4. This will help prevent loosening of the dental implant fxture over time.

Key words: Dental implants , · Surface treatment , · Sandblast , · Surface roughness , · Osseointegration