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Moreover, these 5mm implants were positioned at the cortical bone level, which has higher elastic modulus and may have influenced at the stress distribution. However, despite the higher stresses, these implants were well able to withstand the applied forces.

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This study evaluated the effects of fluoride-containing solutions on the surface of commercially pure titanium (CP Ti) obtained by casting. CP Ti specimens were fabricated and randomly assigned to 5 groups (n=10): group 1: stored in distilled water at 37 +/- 1 masculineC; group 2: stored in distilled water at 37 +/- 1 masculineC and daily immersed in 0.05% NaF for 3 min; group 3: stored in distilled water at 37 +/- 1 masculineC and daily immersed in 0.2% NaF for 3 min; group 4: stored in distilled water at 37 +/- 1 masculineC; and immersed in 0.05% NaF every 15 days for 3 min; and group 5: stored in distilled water at 37 +/- 1 masculineC and immersed in 0.2% NaF every 15 days for 3 min. Surface roughness was measured with a profilometer immediately after metallographic polishing of the specimens (T0) and at 15-day intervals until completing 60 days of experiment (T15, T30, T45, T60). Data were analyzed statistically by ANOVA and Tukey's test (alpha=0.05). There was no statistically significant difference (p>0.05) in surface roughness among the solutions. In conclusion, fluoride-containing solutions (pH 7.0) used as mouthwashes do not damage the surface of cast CP Ti and can be used by patients with titanium-based restorations.