Abstract
Abstract Introduction The silanization of the ceramic surface prior to applying the adhesive and/or resinous materials plays an important role in bond strength. Nowadays, a new family of adhesive systems has been introduced into the market, aiming to simplify the technique of adhesive procedures during cementation. Objective To investigate the effectiveness of different bonding agents containing silane and primer on Lithium Disilicate Glass Ceramic (LD) surface by shear bond strength tests. Material and method 130 LD ceramic blocks were included in acrylic resin, polished and washed in ultrasound for 10 minutes. The specimens were divided into 2 groups according to surface treatment: Polished Surface (PS); Hydrofluoric Acid 9.5% - 20s (HF). Each group was divided into 5 subgroups (n = 13) according to bonding agent type: metallic primer containing MDP (ZPrimePlus, Bisco Inc); two traditional silanes (MonobondPlus, IvoclarVivadent / Porcelain Prime, Bisco Inc.); mixture of silane and resin (Kerr Silane, Kerr); mixture of silane and universal adhesive (Single-bond Universal, 3M Espe). The specimens were mounted in a standard device for shear testing (UltradentBonding Assembly), cemented with dual resin cement (RelyX UltimateTM, 3M Espe.) and photo-polymerized for 20s. The samples were tested after 24 hours and 3 months of storage in distilled water at ±36 °C. The data were analyzed by 3-Way Anova and Tukey's test (α = 5%). Result Shear bond strength (SBS) was significantly influenced by surface treatment, bonding agent used and storage (p <0.001). Conclusion Adequate adhesive bond strength to Lithium Disilicate Glass Ceramic can be obtained with traditional silanes, combined with HF acid pretreatment surface.
Highlights
The silanization of the ceramic surface prior to applying the adhesive and/or resinous materials plays an important role in bond strength
Several studies have reported that high bond strengths obtained after 24h are compromised after aging in water with a significant reduction in the bond strength between the resin and the ceramic[24]. These findings are corroborated in the present study because the results revealed a notable reduction in bond strength, regardless of the surface treatment and bonding agents used on the ceramic surface, some authors recommend greater storage time in a medium of artificial saliva[25]
Bond strengths higher than lithium disilicate glass ceramic can be obtained after conditioning with HF acid
Summary
The silanization of the ceramic surface prior to applying the adhesive and/or resinous materials plays an important role in bond strength. Objective: To investigate the effectiveness of different bonding agents containing silane and primer on Lithium Disilicate Glass Ceramic (LD) surface by shear bond strength tests. Lithium disilicate glass ceramics (IPSe.maxCAD) are gaining popularity in restorative treatment as they satisfy the aesthetic demands of patients faster and with a favorable prognosis. These systems offer the dentist the opportunity to prepare, design and manufacture a ceramic restoration in one visit, without the need for making impressions, temporary restorations and a laboratory phase[2,3]
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