Physicochemical Properties of Dentine Subjected to Microabrasive Blasting and Its Influence on Bonding to Self-Adhesive Prosthetic Cement in Shear Bond Strength Test: An In Vitro Study

Abstract

The aim of this in vitro study was to assess the influence of microabrasive blasting on the physicochemical properties of dentine and shear bond strength (SBS) of self-adhesive resin cement (Maxcem Elite, Kerr, Orange, CA, USA) bonded to the dentine surface. Ninety cylindrical specimens with exposed dentine of human teeth were prepared and divided into three randomized, parallel sample sets A, B, and C. Groups B and C were subjected to abrasive blasting using a micro-sandblasting device (Microetcher IIa, Danville Materials, Carlsbad, CA, USA) with two gradations of Al2O3 abrasives (Group B, abrasion with a gradation of 50 mm; group C, abrasion with a gradation of 27 mm). SEM imaging, profilometry, chemical composition analysis, contact angle measurements, surface free energy, and SBS tests were performed. The resulting data were statistically analyzed using the Statistica software (ver. 13.3, Tibco Software Inc., Palo Alto, CA, USA). Microabrasive blasting caused changes in surface topography, structural features, and the connection strength between the dentin surface and self-adhesive prosthetic cement. Air microabrasion through the multifactorial positive reorganization of the treated surface of dentine is recommended as a pretreatment method in fixed prosthodontics adhesive cementation protocols.

Particle abrasion as a pre‐bonding dentin surface treatment: A scoping review

“…Out of the total 33 publications considered, one paper is a systematic review and meta-analysis 16 while the others are in vitro studies. 15,[17][18][19][20][21][22][23][24][25][26][27][28][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] Human dentin was used in 90.9% of the articles, [15][16][17][18][19][20][21][23][24][25][26][27][28]32,33,[35][36][37]…”

“…15,[17][18][19][20][21][22][23][24][25][26][27][28][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49] Human dentin was used in 90.9% of the articles, [15][16][17][18][19][20][21][23][24][25][26][27][28]32,33,[35][36][37][38][39][40]…”

“…Bond strength was assessed using microtensile tests in 65.6% of the publications, [18][19][20]22,[25][26][27][28]31,34,35,[39][40][41][42][43][44][46][47][48][49] while the remaining 34.4% employed shear bond strength tests. 15,17,21,23,24,32,33,[36][37][38]45 Twenty-one studies incorporated scanning electron microscopy (SEM) analysis 17,[19][20][21][22][24][25][26][27][28][31][32][33][39][40][41]43,44,…”

“…16,23 Dentistry leverages a diverse spectrum of abrasive particles, notably including aluminum oxide, bioactive glass, sodium bicarbonate, and glycine. 16,17,24 Aluminum oxide prevails in contemporary practice, 17,25 exhibiting high biocompatibility and insolubility. 26 These particles, characterized by their irregular shapes, 17 claim the zenith of hardness among all their abrasive counterparts.…”

“…26 These particles, characterized by their irregular shapes, 17 claim the zenith of hardness among all their abrasive counterparts. 24 Over the last few years, bioactive glasses have garnered attention as prospective alternatives, as these particles display a milder abrasiveness compared to aluminum oxide, attributable to their spherical geometry and lower density. 17 When used for air abrasion procedures, bioglass generates a bioactive smear layer atop the dentin.…”