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CC BY-NC-ND 4.0 · Eur J Dent 2011; 05(03): 281-290
DOI: 10.1055/s-0039-1698893
Original Article
Dental Investigation Society

Nanoleakage for Self-Adhesive Resin Cements used in Bonding CAD/CAD Ceramic Material to Dentin

Wafa El-Badrawy
a   Department of Clinical Sciences, Restorative Discipline, Faculty of Dentistry, University of Toronto, Toronto, Canada.
,
Randa Mohamed Hafez
b   Department of Operative Dentistry, Faculty of Oral and Dental Medicine, Cairo University, Cairo, Egypt.
,
Abeer Ibrahim Abo El Naga
c   Department of Operative Dentistry, College of Oral and Dental Surgery, Misr University for Science and Technology, Misr, Egypt.
,
Doaa Ragai Ahmed
d   Department of Operative Dentistry, Faculty of Oral and Dental Medicine, Alexandria University, Alexandria, Egypt.
› Author Affiliations
Further Information

Publication History

Publication Date:
30 September 2019 (online)

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ABSTRACT

Objectives: To determine nanoleakage of CAD/CAM ceramic blocks bonded to dentin with selfadhesive resin cement. Methods: Eighteen sound extracted human molars were sterilized and sectioned into 3 mm-thick dentin sections. Trilux Cerec Vitablocks (Vita) were also sectioned into 3 mm sections, surfacetreated using 5% hydrofluoric acid-etchant, and then coated with silane primer (Vita). Trilux and dentin sections were cemented together by means of three resin cements: Rely-X Unicem (3M/ ESPE), BisCem (Bisco), and Calibra (Dentsply), according to manufacturers' recommendations. Calibra was used in conjunction with Prime/Bond-NT adhesive (Dentsply), while the other two are self-adhesive. The bonded specimens were stored for 24h in distilled water at 37°C. Specimens were vertically sectioned into 1 mm- thick slabs, yielding up to six per specimen. Two central slabs were randomly chosen from each specimen making up the cement groups (n=12). Each group was subdivided into two subgroups (n=6), a control and a thermocycled subgroup (5-55°C) for 500 cycles. Slabs were coated with nail polish up to 1 mm from the interface, immersed in a 50% silver nitrate solution for 24h, and tested for nanoleakage using Quanta Environmental SEM and EDAX. Data were statistically analyzed using two-way ANOVA and Tukey's post-hoc tests. Results: Rely-X Unicem and Calibra groups demonstrated no significant difference in the percentage of silver penetration, while the BisCem group revealed a significantly higher percentage (P≤.05). Thermocycling (500 cycles) did not have a statistically significant effect on the percentage of silver penetration (P>.05). Conclusions: One self-adhesive-resin cement demonstrated a similar sealing ability when compared with a standard resin cement. Thermo-cycling did not significantly increase dye penetration under the test conditions. (Eur J Dent 2011;5:281-290)

Key words:

Bonding - Nanoleakage - Self-adhesive - Ceramic blocks - CAD/CAM
 

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