Histologic and Biomechanical Evaluation of 2 Resorbable-Blasting Media Implant Surfaces at Early Implantation Times
This study evaluated 3 implant surfaces in a dog model: (1) resorbable-blasting media + acid-etched (RBMa), alumina-blasting + acid-etching (AB/AE), and AB/AE + RBMa (hybrid). All of the surfaces were minimally rough, and Ca and P were present for the RBMa and hybrid surfaces. Following 2 weeks in vivo, no significant differences were observed for torque, bone-to-implant contact, and bone-area fraction occupied measurements. Newly formed woven bone was observed in proximity with all surfaces.
Implant surfaces' electron micrographs of (a) alumina-blasting + acid-etching surface depicting a surface without the presence of embedded alumina particles. (b) The resorbable-blasting media + acid-etched (RBMa) micrograph shows a surface with evidence that the acid-etching procedure was partially effective at removing embedded blasting media particles. (c) The hybrid surface presenting a similar morphology to the RBMa surface.
Three-dimensional atomic force microscopies of (a) alumina-blasting + acid-etching, (b) resorbable-blasting media + acid-etched, and (c) hybrid surface.
Figure 3. Atomic force microscopy assessment of measurable roughness parameters showed that the alumina-blasting + acid-etching surface presented significantly higher mean Sa (P < .03) and Sq (P < .04) values compared with resorbable-blasting media + acid-etched. The hybrid surface roughness presented intermediate values. All surfaces were in the minimally rough range (Sa 0.5–1 μm). The number of asterisks denotes statistically homogeneous groups. Figure 4. Removal torque statistics summary (mean ± 95% confidence interval) for the different surfaces at 3 weeks.
Representative optical microscopy montage depicting close contact between implant surfaces and cortical and trabecular bone regions (toluidine blue staining; original magnification ×25).
Representative histologic section at 3 weeks for (a) alumina-blasting + acid-etching, (b) resorbable-blasting media + acid-etched, and (c) hybrid surfaces. Note the close proximity of newly formed woven bone with all implant surfaces.
(a) Bone-to-implant contact and (b) bone area fraction occupied statistics summary (mean ± 95% confidence interval) for the different surfaces. The number of asterisks denotes statistically homogeneous groups.
Contributor Notes