بحوث سكوبس — منتظر صالح مهدي

Background: Nanocoating of biomedical materials has emerged as a crucial emerging discipline, to enhance tribological behaviors, durability, and performance of materials. Objective: This study aimed to investigate the tribological characteristics of substrates coated with Hydroxyapatite (HAp) and Silica glass (SiO2). Material and Methods: In this experimental study, the substrates were Ti-6Al4V, a widely used titanium alloy for osseointegration implants. The substrates were coated with 90% HAp and 10% SiO2 via the plasma cold spray technique. The friction examination was analyzed at room temperature and under the Simulated Body Fluid (SBF) condition using the pin-on-disc technique. Results: The microstructural analysis confirmed the coated technique in producing a nano-sized layer. While the pin-on-disc test indicates that nanocoated Ti-6Al-4V specimens have a significantly higher average coefficient of friction than uncoated specimens, surface roughness is the primary contributor. Conclusion: Through microstructure properties and tribological behavior, the coated alloy may provide a benefit in circumstances, in which lubrication availability is restricted or undesirable, such as when the implant comes into contact with the bone interface. © 2025, Shiraz University of Medical Sciences. All rights reserved.

Background: The utilization of osseointegration and its applications has facilitated significant improvements in the quality of life for individuals who have limb or bone loss. This is because osseointegration fosters growth and connection between the remaining bone and the biomaterial utilized to replace the missing bone. Objective: To achieve optimal biocompatibility and bioactivity with the living organism's bone, further development of biomaterials utilized in osseointegration applications is necessary. Methods: In this regard, the present study utilizes the plasma cold spray technique to deposit a coating comprising 10% silica (SiO2) nanoparticles and 90% hydroxyapatite (HAp) nanoparticles onto (Ti-6Al-4V-ASTM Grade 5) substrates. The properties of the coated layer were analyzed via implantation in a biological setting by conducting the implantation of coated and uncoated substrates into the bodies of living organisms, namely rabbits. Results: The findings indicated that the coating provided important values and advantages, including a unique distribution well-suited for usage in medical implants, as shown by the promising outcomes determined by mechanical and histological analysis of the coated implants subsequent to their implantation in the skeletal systems of living rabbits. Conclusions: The coating conditions with this technology can be easily controlled, along with cost optimization. The process of osseointegration was found to be positively correlated with the duration of healing. © 2025 The Author(s).