Abstract
Titanium and its alloys have been used in dentistry to due their excellent corrosion resistance and biocompatibility. However, titanium coating is bioinert material and it cannot chemically bond to bone tissue. The purpose of this work was evaluating the bioactivity of Ti-7,5Mo alloy after chemical treatment using H2SO4 / H2O2 and soaking in SBF. Samples were chemically treated at room temperature for 4 h with a solution consisting of equal volumes of concentrated H2SO4 (200 ml) and 30% aqueous solution H2O2 (200 ml). The oxidized samples were rinsed with distilled water and were heat treated at 600°C for 1h in a electrical furnace in air. Then, all samples were immersed in SBF (Simulated Body Fluid) for 7 and 14 days to form a calcium phosphate (Ca/P) coating on the surface. Surfaces were characterized by using SEM, AFM and contact angle. The results indicated that calcium phosphate (Ca/P) was formed on surface of Ti-7.5Mo experimental alloy.
Highlights
Titanium (Ti) and some Ti alloys have attractive features for load-bearing bone repairing materials, such as relatively low modulus, excellent strength-to-weight ratio, good fracture toughness, superior biocompatibility, and durable corrosion resistance[1,2,3]
Titanium alloys based on different compositions such as Ti-7.5Mo5,6, Ti-10Mo7-9, Ti-15Mo10, Ti-29Nb-13Ta-4.6Zr11 and Ti-13Nb-13Zr12 have been studied for biomedical applications
Pan et al.[17] reported that in a hydrogen peroxide solution, a titania gel layer is formed on the titanium surface, and this titania gel helps to form an apatite layer in simulated body fluid due to the increase of the number of hydroxyl groups to take place on H2O2 treated titanium surfaces
Summary
Titanium (Ti) and some Ti alloys have attractive features for load-bearing bone repairing materials, such as relatively low modulus, excellent strength-to-weight ratio, good fracture toughness, superior biocompatibility, and durable corrosion resistance[1,2,3]. Titanium alloys based on different compositions such as Ti-7.5Mo5,6, Ti-10Mo7-9, Ti-15Mo10, Ti-29Nb-13Ta-4.6Zr11 and Ti-13Nb-13Zr12 have been studied for biomedical applications. Several studies have shown the use of chemical oxidation to create nanopatterns on the surface of commonly used biocompatible metals such as Ti and Ti alloys[13,14]. Chemical treatments of Ti implant surfaces have been widely applied to clean and decontaminate Ti surfaces, surface composition and roughness, enhance wettability, surface energy and improve osteogenesis and osseointegration[15,16]. Pan et al.[17] reported that in a hydrogen peroxide solution, a titania gel layer is formed on the titanium surface, and this titania gel helps to form an apatite layer in simulated body fluid due to the increase of the number of hydroxyl groups to take place on H2O2 treated titanium surfaces
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