J Adv Prosthodont.  2013 Aug;5(3):226-233. 10.4047/jap.2013.5.3.226.

Adhesion of 10-MDP containing resin cements to dentin with and without the etch-and-rinse technique

• Turp V
• Sen D
• Tuncelli B
• Ozcan M

• KMID: 2118160
• DOI: http://doi.org/10.4047/jap.2013.5.3.226

Abstract

PURPOSE
This study evaluated the adhesion of 10-MDP containing self-etch and self-adhesive resin cements to dentin with and without the use of etch-and-rinse technique.
MATERIALS AND METHODS
Human third molars (N=180) were randomly divided into 6 groups (n=30 per group). Conventional (Panavia F2.0, Kuraray-PAN) and self-adhesive resin cements (Clearfil SA, Kuraray-CSA) were bonded to dentin surfaces either after application of 3-step etch-and-rinse (35% H3PO4 + ED Primer) or two-step self-etch adhesive resin (Clearfil SE Bond). Specimens were subjected to shear bond strength test using the universal testing machine (0.5 mm/min). The failure types were analyzed using a stereomicroscope and quality of hybrid layer was observed under a scanning electron microscope. The data (MPa) were analyzed using two-way ANOVA and Tukey's tests (alpha=.05).
RESULTS
Overall, PAN adhesive cement showed significantly higher mean bond strength (12.5 +/- 2.3 - 14.1 +/- 2.4 MPa) than CSA cement (9.3 +/- 1.4 - 13.9 +/- 1.9 MPa) (P<.001). Adhesive failures were more frequent in CSA cement groups when used in conjunction with two-step self-adhesive (68%) or no adhesive at all (66%). Hybrid layer quality was inferior in CSA compared to PAN cement in all conditions.
CONCLUSION
In clinical situations where bonding to dentin substrate is crucial, both conventional and self-adhesive resin cements based on 10-MDP can benefit from etch-and-rinse technique to achieve better quality of adhesion in the early clinical period.

Keyword

Adhesion; Bond strength; Dentin; Hybrid layer; Self-adhesive cement

MeSH Terms

Adhesives
Aluminum Compounds
Calcium Compounds
Chimera
Collodion
Dentin
Electrons
Humans
Molar, Third
Resin Cements
Sulfur Compounds
Adhesives
Aluminum Compounds
Calcium Compounds
Collodion
Resin Cements
Sulfur Compounds

Figure

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  Fig. 1 (A) schematic diagram of specimen and (B) the shear testing.

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  Fig. 2 SEM micrograph of cement-dentin interface luted with Panavia F2.0 and bonded on etched and rinsed dentin, where a thick hybrid layer (1) and uniform distribution of resin tags (2) are visible observed. (Group 1) (×1,000 magnification).

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  Fig. 3 SEM micrograph of cement-dentin interface luted with Panavia F2.0 and bonding on unconditioned dentin, where hybrid layer is thinner compared to acid conditioned group of the same material (1). Also resin tags are weak (2) and are not infused into dentin tubules homogenously (3) (Group 2) (×1,000 magnification).

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  Fig. 4 SEM micrograph of cement-dentin interface luted with Clearfil SA cement and bonding on etched and rinsed dentin, where irregular hybrid layer (1) and resin tag formations (2) are observed (Group 3) (×1,000 magnification).

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  Fig. 5 SEM micrograph of cement-dentin interface luted with Clearfil SA cement bonded on unconditioned dentin, where hybrid layer is very thin and not present in some areas (1), resin tags are very few (2) and dentin tubules are mostly empty (3) (Group 4) (×1000 magnification).

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  Fig. 6 SEM micrograph of cement-dentin interface luted with Clearfil SA cement on unconditioned dentin, where hybrid layer is almost not present (1) and number of resin tags are very few in number (2) with empty dentin tubules (3) (Group 5) (×1000 magnification).

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  Fig. 7 SEM micrograph of cement-dentin interface luted with Panavia F2.0 cement on unconditioned dentin, adhesive failure can be observed (Group 6) (×1000 magnification).

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