Evaluation of the Influence of the Silane Drying Temperature on the Feldspar and Zirconia-Based Ceramics Surfaces

Abstract

Ceramics are widespread used in restorative dentistry, mainly due to their aesthetics features. However, adequante bond strenght of this type on restoration to tooth structure spawned several investigations which aim to develop a clinical protocol for ceramic surface treatment. The objective of this study was to evaluate the influence of air temperature on the drying process of silane agent and the adhesion of feldspar and yttrium stabilized zirconia. They were divided into three groups (n=10): control; room temperature dried silane; and silane drying at 70º C. Then, composite resin cylinders were bonded to the samples and taken to a shear test. The results showed that air temperature rise, in silane drying, improved bonding resistance in Y-TZP ceramics, nevertheless in feldspatic ceramics, the bonding resistance was not altered.

The Use of Warm Air for Solvent Evaporation in Adhesive Dentistry: A Meta-Analysis of In Vitro Studies

“…Alternative methods to enhance the adhesion of zirconia include aluminum oxide gushing and silica tribochemical coating [105]. The latest technique is warm air which did not match with the findings of this meta-analysis as no improvement in the bond strength was observed [49].…”

“…After reading the full text, nine articles were excluded due to several reasons: in (4), the bond strength was not evaluated [18,[30][31][32]; in (4), a warm air stream was not tested [33][34][35][36]; and (1) was a thesis [37]. Then, a total of 28 articles were included in the qualitative analysis [12][13][14]16,20,21,23,24,29,[38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. One study was excluded from the meta-analysis because there were no more studies for comparison [53].…”

“…For oxide-based ceramics, the use of warm air did not improve the bond strength of indirect restorations. Few articles have researched this topic [49,54]. The researchers involved in this field experimented on the effect of silane air-drying temperature (room temperature and 70 • C) on the adhesion of oxide-based ceramics (feldspar and yttriumstabilized zirconia) and found that the increased air-drying temperature enhanced the bond resistance of zirconia ceramics, but not feldspar ceramics [49].…”

Evaluation of Morphology and Roughness of the Surface of a Ceramic Based on Lithium Disilicate, after Conditioning with Acid Hydrofluoric the 5% and 10%

“…Figures 1 to 10 show morphology of the surface of the samples of each group. A qualitative morphological analysis showed that hydrofluoric acid, at the concentrations and the proposed experimental times, was able to dissolve the glassy matrix of the ceramic lithium disilicate, exposing the crystals and promoting an irregular surface, improving micromechanical retention between the ceramic and the cementing agent [5,7,8,13,14,15].…”

“…However, the prosthetic tooth preparation, the prior dental substrate conditioning and the treatment of the ceramic surface directly influence the retention and longevity of an indirect restoration. Therefore, the success of ceramic restorations is dependent on the bond between resin cement, dental substrate and restore [3,4,5].…”