Histologic and Biomechanical Evaluation of Alumina-Blasted/Acid-Etched and Resorbable Blasting Media Surfaces
This study evaluated the early biomechanical fixation and bone-to-implant contact (BIC) of an alumina-blasted/acid-etched (AB/AE) compared with an experimental resorbable blasting media (RBM) surface in a canine model. Higher texturization was observed for the RBM than for the AB/AE surface, and the presence of calcium and phosphorus was only observed for the RBM surface. Time in vivo and implant surface did not influence torque. For both surfaces, BIC significantly increased from 2 to 4 weeks.
Scanning electron microscopy micrographs show morphology of (a) resorbable blasting media experimental and (c) alumina-blasted/acid-etched control surfaces. Higher magnification of the respective surfaces (b and d) did not reveal evidence of particle embedding in either surface.
Figure 2. Micrometer length scale optical interferometry reconstructions showing higher Sa and Sq values for the resorbable blasting media compared with the control surfaces. Figure 3. Statistical summary (mean ± 95% CI) of surface roughness parameters at the micrometer level length scale. Statistical P values for the experimental Sa and Sq were significantly higher compared with control groups (P < .05).
Figure 4. Optical microscopy revealed similar bone to implant response for both experimental (PTS) and control (RED) surfaces at cortical regions, where (a) woven bone along with interfacial remodeling was observed in proximity with the implant surfaces at 2 weeks, and (b) higher degrees of bone organization were observed at 4 weeks, where partial replacement of woven bone by lamellar bone was observed (arrows). Toluidine blue stained. Figure 5. Optical microscopy revealed similar bone to implant response for both experimental (PTS) and control (RED) surfaces at trabecular regions, where (a) woven bone was observed in proximity with the implant surfaces at 2 weeks, and (b) higher degrees of bone organization were observed at 4 weeks, where lamellar bone surrounding primary osteonic structures was observed (arrows). Toluidine blue stained.
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