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Abstract
In the present study, the in vitro biological responses of Titanium (Ti) and two competitive titanium alloys (Ti6Al4V and Ti6Al7Nb) were investigated after modifying their surfaces by sandblasting and acid etching. The sandblasting and acid etching process was sandblasted by Al2O3 particles and acid etched by a mixture of hydrochloric acid and sulphuric acid. After the process, the surfaces of Ti, Ti6Al4 V and Ti6Al7Nb were porous of micrometres. Simulated body fluid tests were conducted to compare the biological performance of the samples. The sample surface morphologies were characterised by SEM, surface crystal structure of the samples was analysed by X-ray diffractometer. Even though microstructure of the alloys exhibited somewhat similar, the deposition of calcium (Ca), and phosphate (P) on the surface of Ti6Al7Nb alloy was greater and faster than that of Ti6Al4V and Ti, which is significant for implant surface modification.