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. 2022 Feb 16;15(4):1476.
doi: 10.3390/ma15041476.

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

Marcin Szerszeń  1 , Julia Higuchi  2 , Barbara Romelczyk-Baishya  3 , Bartłomiej Górski  4 , Witold Łojkowski  2 , Zbigniew Pakieła  3 , Elżbieta Mierzwińska-Nastalska  1
Affiliations

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

Marcin Szerszeń et al. Materials (Basel). .

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 μm; group C, abrasion with a gradation of 27 μm). 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.

Keywords: air-micro-abrasion; dentine properties; microabrasion; microabrasive blasting; sandblasting; self-adhesive resin cement; shear bond strength.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Prepared tooth embedded in epoxy resin after polishing with waterproof sandpaper and rinsing.
Figure 2
Figure 2
Sample preparation for shear bond strength tests. (A) Specimen is placed in the BSM1 tool, and the rubber cylinder with opening is placed on the test surface of the sample; (B) pressing the rubber cylinder against the sample surface by a platform engaged with tension springs; (C) applying cement to the opening of the rubber cylinder; (D) sample after being released from the BSM1 tool.
Figure 3
Figure 3
Scanning electron microscopy (SEM) of dentine samples in control group (A), 50 μm microabrasive blasting group (B), 27 μm microabrasive blasting (C), at 500× magnification (*), 1000× magnification (**), and 5000× magnification (***). Red arrows—exposed dentinal tubule orifices.
Figure 4
Figure 4
Representative 3D projections of dentine surface layers obtained by a VHX-7000 digital microscope in the group without microabrasive blasting (A) and prepared by means of a microsandblaster with the usage of 50 (B) and 27 μm (C) Al2O3.
Figure 5
Figure 5
(a,b) Aluminum oxide grains embedded in dentine/smear layer; (c) graphical representation of the elements in the outer layer of the area of sample B marked on the illustration.
Figure 6
Figure 6
EDS analysis with mapping of the surface of the dentin sample. The arrows indicate aluminum clusters. Scanning electron microscope images, 1000× magnification.
Figure 7
Figure 7
Sample images of specimens after SBS testing in different groups (20× magnification).
See this image and copyright information in PMC

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