Letteratura scientifica

Abstract

 

The objective of this study was to physico/chemically characterize and compare the biomechanical fixation of 3 different grit-blasting and acid-etching procedures in titanium alloy surfaces.

 

Methods: The surfaces were characterized by electron microscopy (SEM), atomic force microscopy (AFM), and x-ray photoelectron microscopy (XPS). Sand-blasted/acid-etched (SBAA), TCP-blasted/acid-etched (TBAA), and TCP-blasted (TB) screw type implants were placed along the proximal tibia of 6 beagle dogs (n = 12 per surface) remaining for 3 and 5 weeks. Following euthanization, the limbs were retrieved and the implants were biomechanically tested (torque to interface fracture) in an automated system until a 10% drop from the maximum torque was recorded. Statistical analysis was performed by one-way ANOVA at 95% level of significance and Tukey’s post-hoc test for multiple comparisons.

 

Results: Surface characterization showed that all surface treatments resulted in moderately rough surfaces. However, SBAA presented rougher profiles compared to the others. The biomechanical testing results showed significant differences between the implant surface groups (p<0.01; mean ?95%Cl in Ncm; 3 weeks – TBAA=99.66?9.81, TB=93.35?9.82, SBAA=88.76?9.81; 5 weeks – TBAA=117.41?9.81, TB=104.58?9.82, SBAA=96.01?9.81).

 

Conclusion: Despite the rougher profile observed for the SBAA surface, bioactive ceramic grit-blasting with or without subsequent acid etching resulted in higher biomechanical fixation after 5 weeks in vivo.

Physico/Chemical Characterization and Biomechanical Evaluation of Three Different Grit-Blasting and Acid-Etching Surface Treatments. An Experimental Study in Dogs.

 

 

2009, Academy of Osseointegration, Annual Meeting, P180

Implant

Surface: 12

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