Bond Strenght of Zirconia Submitted to Different Surface Treatments

Abstract

Objective: To evaluate the shear bond strength of a recent adhesive system used in the cementation of zirconia. Material and Methods: Overall, 72 zirconia specimens (Zirconzhan) were divided and randomized into 3 groups according to the type of surface treatment: G1 no treatment + adhesive system; G2 blasted with aluminum oxide + adhesive system and G3 tribochemical treatment (Rocatec Plus) + adhesive system. Half of each group (n = 12) had bond strength evaluated on two occasions: 24 hours after cementation, kept stored in distilled water at 37 ° C without thermal cycling, and after thermal cycling (5000 cycles, 5°C-55°C). Data were analyzed by ANOVA with Tukey's post-test (α≤0.05). Results: At first moment, G1 and G3 showed higher bond strength (8.64 ± 3.43 MPa and 6.55 ± 2.27 MPa) compared to G2, with no statistically significant difference between them. After thermal cycling, G3 showed higher bond strength (7.70 ± 1.82 MPa). Conclusion: Initially, only the adhesive system promoted higher bond strength, but after thermal cycling,bond strength decreased. The best treatment to promote high bond strength to zirconia is to associate tribochemical treatment with the adhesive system; most failures observed after thermal cycling were mixed and cohesive, showing a mechanical imbrication of the adhesive system, suggesting that there is no chemical bond; and the surface of the group with greater bond strength after thermal cycling showed more surface irregularities compared to the other groups.

Zirconia bond strength durability following artificial aging: A systematic review and meta-analysis of in vitro studies

“…Four of them presented increase [86] , [137] , [147] , [162] . When SA was used with additional surface pre-treatments (SA + OST), mean pooled difference showed significant changes in all groups, while only 1 study [171] showed no significant mean difference of bond strength after aging and ( Fig. 2 B).…”

“…In cases where SA was applied with no other surface pre-treatment (SA+NOST), 7 studies [137] , [147] , [148] , [160] , [161] , [162] , [171] in the shear test group showed no significant difference of bond strength after aging, while mean pooled difference of groups based on cement/primer combination showed significant differences in all groups ( Fig. 2 A, Table 2 ).…”

“…Er,Cr:YSGG [144] and Er:YAG [88] laser irradiation etching were other laser treatments that were used. Also, TSC 110 µm [118] , [119] , [171] and HF [140] , [158] , [175] etching were performed additionally to SA. Other treatments included the immersion in different chemical solutions such as Si 3 N 4 and Si 3 N 4 -NaOH solution [127] , 37% H 3 PO 4 [125] , [157] , piranha solution (H 2 SO 4 :H 2 O 2 = 3:1) [102] , CH 2 Cl 2 and hot etching solution 37% HCl [110] .…”

Las PROPIEDADES ÓPTICAS Y MECÁNICAS DEL ZIRCONIO TRANSLÚCIDO COMO MATERIAL RESTAURADOR ÓPTIMO EN PRÓTESIS FIJA UNA REVISIÓN DE LA LITERATURA

“…El estudio se llevó a cabo en grupos aleatorizados de zirconio con un tipo de tratamiento superficial. Los primeros resultados arrojan una mayor fuerza adhesiva en los grupos 1 y 3; sin embargo, se marca una diferencia clara entre ambos grupos luego del ciclo térmico, tras lo cual el grupo 3 que presentó mayor fuerza de unión y el 93% del peso de la muestra correspondía al zirconio 51 .…”

Structural and Morphological Evaluation of Presintered Zirconia following Different Surface Treatments

“…[20][21][22] As for chemical bonding, many studies reported that using primers and resin cement based on 10-methacryloyloxydecyl dihydrogen phosphate (MDP) monomer increased bond strength. 23,24 They are considered as materials of choice for cementation of indirect alumina and zirconia restorations, since MDP monomer bonded directly to metal oxides and the phosphoric-acid groups of MDP can react with the oxide layer on the zirconia surface. 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.…”