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EVALUATION AND COMPARISON OF MECHANICAL AND CHEMICAL SURFACE MODIFICATIONS OF COMMERCIAL TITANIUM FOR ORTHODONTIC IMPLANTS”

Sarala Bandi, Dharmendra chadalavada, Surendra kumar A

Objective: The study evaluated two different methods of modification of titanium surface by blasting with various materials and by acid etching with different acids and to compare the surface roughness levels, surface wettability and surface configuration of variously treated surfaces of titanium. Materials and methods: Commercially pure titanium (Grade I) sheets of 0.2mm thick and 4.5mm diameter are used for this study. Blasting of the titanium substrates with various blasting materials is done using Alumina, Hydroxyapatite, and Tricalcium phosphate, Acid etching with Hydrofluoric acid, Hydrochloric acid and sulfuric acid .Surface roughness levels were measured with the help of surface profilometer and surface analyzer. Surface wettability is measured with help of contact angle measurement using light microscope and surface configuration was determined with the help of scanning electron microscopy. Results: Titanium sheets Blasted with alumina (100), and dual etched with HCL+H2SO4 Showed highest surface roughness values, samples, blasted with biphasic material (combination of Hydroxyapatite and tricalcium phosphate) showed uniform rougher surface in scanning electron pictomicrograph. And Samples blasted with biphasic material and those treated with Hydrofluoric acid 2% showed lowest contact angle Measurements. Conclusion: The modification of the titanium surface by both chemical and mechanical methods, have shown the uniform surface roughness and increase in the surface area of the samples.