J Korean Acad Prosthodont.  2014 Apr;52(2):113-120. 10.4047/jkap.2014.52.2.113.

Retentive bond strength of fiber-reinforced composite posts cemented with different surface treatments

• Roh H
• Noh K
• Woo YH
• Pae A

• KMID: 2000137
• DOI: http://doi.org/10.4047/jkap.2014.52.2.113

Abstract

PURPOSE
This study will evaluate the effectiveness of various pretreatments when fiber-reinforced composite (FRC) post is bonded to endodontically treated tooth with resin cement.
MATERIALS AND METHODS
Canal shaping of FRC post (DT Light post, Size 3, Bisco Inc., Schaumburg, IL, USA) was performed on endodontically treated premolars at 1.5 cm from CEJ. Samples were divided into 6 groups of surface treatment after conventional washing and drying to the canal. Total of 24 FRC posts were randomly divided into 6 groups of surface treatment as follows: Group C: control - no surface treatment, Group A: airborne-particle abrasion (Cojet sand, 3M ESPE), Group S: silanization (Bis-silane, Bisco Inc.), Group M: universal primer (Monobond-plus primer, Ivoclar Vivadent Inc.), Group AS: silanization after airborne-particle abrasion, Group AM: universal primer treatment after airborne-particle abrasion. Pretreated fiber posts were cemented with resin-based luting material and photo-polymerized and cut to the thickness of 1 mm. Push-out test using a universal testing machine was performed. Bonding failure strength of post dislodgement was measured and the type of bonding failure was classified. Data were analyzed with Kruskal-Wallis test and multiple comparison groups were performed using Tukey HSD value of rank test (alpha=0.05).
RESULTS
Group AS showed significantly highest bonding strength. Group S, group AM, group A, and group M showed lower bonding strength in order. The control group showed the lowest bonding strength.
CONCLUSION
Surface treatment with silane showed to be the most effective of the surface pretreatment methods for cementation of FRC post. Surface treatment with universal primer showed no significant difference compared with no surface treatment group as for bonding strength.

Keyword

Fiber-reinforced composite (FRC) post; Surface treatment; Universal primer; Dental silane

MeSH Terms

Bicuspid
Cementation
Resin Cements
Silicon Dioxide
Tooth
Tooth Cervix
Resin Cements
Silicon Dioxide

Figure

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  Fig. 1. Schematic drawing of push-out bond strength test.

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  Fig. 2. Distribution of the push-out strength value (MPa). ∗statistical differences [C; A, S, AS], [M; S, AS] (P<.05)

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  Fig. 3. Distribution of the failure modes following the push-out strength test.

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  Fig. 4. Example of the failure types used for classification of failure modes after push-out bond strength test. (A) adhesive failure mode with post (100×), (B) adhesive failure with dentin (80×), (C) cohesive failure in post (100×), (D) cohesive failure in resin (90×), (E) mixed failure(120×). Black arrows indicate the remaining resin cement. White arrows indicate the remaining dentin.

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