1. Ingeniería

The 6th International Congress on Adhesive Dentistry
January 30- February 1, 2015
Faculty of Dentistry, Mahidol University, BANGKOK, THAILAND
For Staff
Abstract number:
Title:
B-02
Tensile Bond Strength of a Self-Etching Ceramic-primer versus a Phosphate-Ester / Silane
Ceramic Primer and Universal Adhesives
Authors & affiliations:
Bock T1, Koch S1, Catel D1
(1: Ivoclar Vivadent AG, Schaan, Liechtenstein)
Abstract: (Your abstract format must follow as INSTRUCTION FOR ABSTRACT SUBMISSION in our official website and must fit in
this box. Your abstract should not exceed 300 words. The box will ‘expand’ over 2 pages as you add text/diagrams into it.)
Objectives: This study compared tensile-bond-strengths (TBS) of resin cements to lithium disilicate (LD2) of an
experimental self-etching ceramic-primer (SEP) to those of a phosphate-ester / silane ceramic-primer, two universal
adhesives and one 2-step self-etch adhesive. While SEP was used on un-etched LD2, the adhesives and the
phosphate-ester / silane ceramic-primer were applied to 5% hydrofluoric-acid (HF)-etched LD2. Thermocycling
was used to test longevity of adhesion between luting-composites and LD2.
Methods: Adhesives and phosphate-ester / silane primer (Monobond Plus) were applied to HF-etched LD2 (IPS
e.max CAD, Ivoclar Vivadent). SEP was applied to un-etched LD2 for 60s, rinsed with water-spray and dried with
compressed air. The adhesives were light-cured before PMMA-cylinders (2.3mm) were bonded to primed LD2
using light-curing resin cements (N=6/series). After water-storage for 24h@37°C (24h) or thermo-cycling
10,000cycles/5-55°C (10kTC) to test longevity of adhesion between cement and LD2, samples were tested in a
universal-testing-machine (ZWICK-ROELL, 0.8 mm/sec crosshead-speed). Data were statistically analyzed by
ANOVA/Tukey-B (p<0.05).
Results:
Etchant
5% HF
-
Type
Universal
adhesive
Ceramicprimer
Universal
adhesive/
CeramicPrimer
Scotchbond
Universal
Optibond XTR
All Bond
Universal
Monobond
Plus
SEP
Tensile Bond Strength [MPa]
Cement
Manufacturer
24h
10kTC
RelyX
Ultimate
3M-ESPE
28.3±5.3(b)
7.9±8.3(c)
Nexus NX-3
Kerr
25.1±12.5(b)
1.4±1.6(c)
Duolink
Bisco
29.9±9.1(b)
6.4±5.6(c)
Variolink
Esthetic DC
IvoclarVivadent
42.1±7.1(a)
35.1±11.5(ab)
42.5±7.2(a)
47.9±6.6(a)
Same letters denominate statistical equivalence.
Adhesives exhibited a statistically significant lower mean TBS than ceramic-primers, with TBS decreasing
significantly during thermocycling. SEP-mediated mean TBS was comparable to the phosphate-ester / silane
ceramic-primer before and after thermocycling.
Conclusion: Within the limitations of this study, the adhesives resulted in high immediate TBS to LD2, but are not
resistant to thermal fatigue. Without HF-etching, SEP resulted in thermocycling-stable TBS, suggesting that
etching/priming of silicates may be combined into one step. The new SEP and the phosphate-ester / silane ceramicprimer resulted in comparable mean TBS to LD2.
Keywords: at least 3 keywords
Adhesion, ceramic, tensile bond strength, longevity, universal adhesives, self-etching, primer
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