الفهرس 
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Abstract
This study correlate the physical properties with biological properties to investigate the biophysical properties ofmodified Ti-based dental implants using X-ray diffraction analysis to do structural analysis, Mechanical measurements(Vickers Hardness, Elastic moduli), physiochemical measurements, Biophysical measurements (Corrosion and PH value) and Biocomptability requirements. This study was carried out using pure square titanium disks , mechanically polished and washed by acetone and distalled water, In our study Ti plates classified according to the condition of the process into two groups, the first group (6 samples) soaked in 5M NaOH at 60ᵒc for 2 days, followed by gentle washing in distilled water and drying in an oven at 37° for (5 min). A-TI plates were subsequently heated to 800ᵒc, 882ᵒc and 900ᵒc at a rate of 5° /min in an electrical furnace, kept for 2 hr, three of them quenched rapidly in ice, and the other allowed to cool in the furnace (AH-TI). The second group (6sample) soaked in 5M NaoH at 60ᵒc for 4 days, followed by gentle washing in distilled water and drying in an oven at 37ᵒc for (5min). A-TI plates were subsequently heated to 800ᵒc,882ᵒcand 900ᵒc at a rate of 5ᵒc /min in an electrical furnace, kept for 2hr ,three of them quenched rapidly in ice , and the other allowed to cool in the furnace (AH-TI). X-ray diffraction analysis obtained for each subgroup that from it we determine the type of oxide formed and calculate Crystallite size and lattice disorders, axial ratio, number of atoms in a unit cell. Also, do some mechanical studies through Dynamic resonance and Vickers micromechanical indentation of crystals, to obtain the various moduli, Hardness Yield stress and the maximum shear stress. Specimens soaked in SBF for 10 days to estimate PH values for them. Evaluate corrosion using a cell containing naturally aerated simulated body fluid (SBF) as electrolyte the working electrode was pure Titanium (Ti).Estimate the Biocomptability by implanting in Gunia pigs animals. Depending on the results and within the limitations of this study the following conclusions can be deduced; • Elevated PH values of simulated body fluid (SBF) after immersion of the treated specimen so can be surely linked to the ionic movement that took place between titanium surface and the surrounding solution. • In simulated body fluid, the oxide film on treated titanium exhibits high corrosion resistance and a long-term stability than control. • Treated Ti subjected to water quenching after treatment is less corrosion resistance than the others as the oxide film responsible for passivity effected by rapid water quenching. • Ti treated in 4 days alkaline medium is more favored than 2 days as it show more corrosion resistance. • Heating until 800ᵒc leads to better formation and integration with bone than heating to 600ᵒc. • Invivo assessment of bioactivity by implanting in animals is more real than invitro assessment.