In vitro comparative bond strength of contemporary self-adhesive resin cements to zirconium oxide ceramic with and without air-particle abrasion

Abstract

This study compared shear bond strengths of six self-adhesive resin cements to zirconium oxide ceramic with and without air-particle abrasion. One hundred twenty zirconia samples were air-abraded (group SB; n = 60) or left untreated (group NO). Composite cylinders were bonded to the zirconia samples with either BisCem (BC), Maxcem (MC), G-Cem (GC), RelyX Unicem Clicker (RUC), RelyX Unicem Applicator (RUA), or Clearfil SA Cement (CSA). Shear bond strength was tested after thermocycling, and data were analyzed with analysis of variance and Holm-Sidak pairwise comparisons. Without abrasion, RUA (8.0 MPa), GC (7.9 MPa), and CSA (7.6 MPa) revealed significantly higher bond strengths than the other cements. Air-particle abrasion increased bond strengths for all test cements (p < 0.001). GC (22.4 MPa) and CSA (18.4 MPa) revealed the highest bond strengths in group SB. Bond strengths of self-adhesive resin cements to zirconia were increased by air-particle abrasion. Cements containing adhesive monomers (MDP/4-META) were superior to other compositions.

Structural and Morphological Evaluation of Presintered Zirconia following Different Surface Treatments

“…27,28,40 In the present study, the combination of mechanical surface treatment (APA with Al 2 O 3 ) and chemical surface treatment by primer (MDP-based primer and cement) increased the bond strength. These results are in accordance with studies that stated that the combination of air abrasion and resin cement containing MDP monomer increases the bond strength to zirconia, 29,30,41,42 this could be explained by the increase in surface Ra, that subsequently increase the surface area of bonding, and improving wettability, in addition to the phosphate monomer that reacts with oxides on the zirconia surface and increases bond strength. 25,43 The highest SBS value was for group II that was abraded after sintering, this may be due to the surface roughness created as a result of APA after sintering that was not affected by sintering temperature, whereas in other groups that were abraded before sintering, the created surface roughness which is the imprint of abraded particles shape was changed and lost a part of its surface roughness characteristics during the sintering process.…”

“…25,26 It was also shown in previous studies that the creation of a micro-retentive surface is an important factor for achieving strong and durable adhesion, and promotes as well the chemical reaction with MDP monomer. 27,28 Furthermore, the combination of air abrasion and resin cement containing MDP monomer increases the bond strength to zirconia 29,30 and decreases the hydrolytic degradation due to aging. 31 Surface treatments that were not commonly investigated are the modification of the zirconia surface in the presintered or partially sintered phase.…”

Resistência de união de diferentes cimentos resinosos a cerâmica à base de dissilicato de lítio

“…Entretanto, existem poucos estudos comparando a resistência de união de cimentos resinosos autoadesivos com a cerâmica. Os estudos existentes têm utilizado zircônia como substrato, testando sua ligação com os cimentos através do teste de cisalhamento 12,13 .…”

Avaliação in vitro da Resistência Adesiva de Quatro Cimentos Resinosos em Dentes Decíduos

“…Ressalta-se que os Grupos 3 e 4 são, respecti vamente, um cimento de ionômero de vidro para cimentação e uma resina quimicamente ati vada. No que pese ao cimento de ionômero de vidro, o resultado obti do é semelhante aos descritos na literatura, que mostra uma ligação ao dente por meio do mecanismo de quelação e ligações secundárias, resultando em uma resistência adesiva mais baixa 10,23,24 . Quanto à resina composta quimicamente ati vada, em termos de propriedade, são inferiores aos cimentos resinoso 25 .…”