Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Gateau, Philippe; Sabek, Marc; Dailey, Bruno

doi:10.1016/s0022-3913(99)70090-9

Cited by 48 publications

(40 citation statements)

References 33 publications

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“…14 These findings were consistent with the results of Cho and others 15 and Gateau and others, 16 both of whom found that some composites exhibited compressive strengths equal to that of amalgam and could be used as alternatives to amalgam. In contrast, glass ionomer cements are not regarded favorably as suitable core materials in areas of the oral cavity subjected to stresses.…”

supporting

confidence: 82%

A Study of the Fracture Resistance of Nyyar Cores of Three Restorative Materials

Ferrier¹,

Sekhon²,

Brunton³

2008

Operative Dentistry

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©Operative Dentistry, 2008, 33-3, 305-311 Clinical RelevanceThe fracture resistance of resin-modified glass ionomer cements merits consideration of their use as core materials for root-filled premolars. S Ferrier • BS Sekhon • PA Brunton SUMMARYDespite the successful use of dental amalgam for coronal-radicular dowel and core build-up in endodontically-treated posterior teeth, newer materials offer many potential advantages over amalgam and have better patient acceptance. This study compared the fracture resistance of coronal-radicular restorations made from three different direct restorative materials. Sixty human premolars were selected, 45 of which were root treated and decoronated. Fifteen of these premolars were restored using amalgam, 15 with composite and 15 using resin-modified glass ionomer. The 15 unrestored teeth were used as a control group. All the teeth were mounted in acrylic within steel containers and subjected to compressive loading to failure on a universal testing machine. The force required to fracture each core specimen was recorded as well as the proportion of core lost due to failure. The results showed dental amalgam as having the highest fracture resistance (mean 1.93kN, sd 0.22) followed by resin-modified glass ionomer (mean 1.05kN, sd 0.20), sound tooth (mean 0.79kN, sd 0.20) and composite (mean 0.75kN, sd 0.11). The differences among all groups were significant. These results demonstrate that, although resin-modified glass ionomer is significantly weaker than amalgam, these restorations were stronger than unrestored teeth and failed at forces in excess of those encountered in normal mastication. Amalgam cores, along with resin-modified glass ionomer, tended to fail less catastrophically than the other materials and, given their strength, would remain the material of choice in situations where abnormally high forces are expected.

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supporting

confidence: 82%

A Study of the Fracture Resistance of Nyyar Cores of Three Restorative Materials

Ferrier¹,

Sekhon²,

Brunton³

2008

Operative Dentistry

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“…As a consequence of practitioners finding esthetic fiber posts a viable alternative to metal posts 10) , a diverse range of fiber posts were quickly introduced into the market. In response to this surge in the use of fiber posts, many studies have been conducted on the adhesion of fiber posts to root canal substrates [11][12][13] , on the different luting procedures 14,15) , and the abutment build-up [16][17][18] . All these studies favorably demonstrated the quality performance of fiber posts 19,20) .…”

Section: Introductionmentioning

confidence: 99%

“…It has been reported that dental restorations fail more frequently under cyclic loading tests that are well below the ultimate flexural strength of these materials, versus the application of a single, relatively higher, external force 25) . Fatigue tests can reveal the resistance level of each type of post under cyclic loading, which simulates the normal occlusal and masticatory function 16,26,27) . On fiber posts, they are in essence composite materials.…”

Section: Introductionmentioning

confidence: 99%

Fatigue resistance and structural integrity of different types of fiber posts

et al. 2008

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The study aimed at assessing and estimating the fatigue resistance of different fiber posts and to observe their ultrastructures through SEM. Six types of fiber posts were used: GC Fiber Post (Group 1), ParaPost Fiber White (Group 2), FibreKor (Group 3), DT Light-Post radiopaque (Group 4), FRC Postec (Group 5), and Luscent Anchors (Group 6). Ten out of 15 posts within each group were used for the fatigue test, and the other five were processed for SEM evaluation. The fatigue test revealed that Groups 1, 4, and 5 performed better than all the other groups, and that their performance differed significantly from the other tested groups from a statistical standpoint. For SEM analysis, Groups 1, 4, and 5 also obtained better results. Through correlation analysis, an absence of correlation between fatigue resistance and structural characteristics suggested that the latter reflected more of the divergence inherent in the manufacturing process of fiber posts.

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“…The retention and stability of post and core systems are important factors for the success of a definitive restoration. Therefore, core build-up materials should exhibit good adaptation and reliable bond strength to the post surface 11,13) . The insertion of FRP posts requires separate conditioning of the intraradicular dentin with total-etch, self-etch bonding materials or self-adhesive resin cement systems 14,15) .…”

Section: Introductionmentioning

confidence: 99%

Influence of Adhesive Systems on Bond Strength between Fiber Posts and Composite Resin Cores in a Pull-out Test Design

et al. 2007

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The aim of this study was to evaluate the effects of post surface conditioning with adhesive systems on tensile bond strength between two composite resin core systems and FRP posts (ER DentinPost). Forty-eight posts were trimmed at the coronal part, and the upper part of 3 mm was covered with a standardized composite resin core build-up. Twenty-four posts were treated with the respective adhesive systems. Four groups were formed: G1 -ClearfilCore; G2 -Clearfil New Bond ＋ ClearfilCore; G3 -MultiCore Flow; and G4 -AdheSE ＋ MultiCore Flow. Mean (SD) bond strengths in MPa were 7.53 (0.89) for ClearfilCore and 8.08 (0.93) for New Bond ＋ ClearfilCore; 5.80 (0.39) for MultiCore Flow and 5.92 (0.43) for AdheSE ＋ MultiCore Flow. ClearfilCore achieved significantly higher bond strengths than MultiCore Flow (two-way ANOVA; p<0.0001). In conclusion, composite resin core materials exerted a significant influence on tensile bond strength, while adhesive systems did not significantly affect the results.

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Fatigue testing and microscopic evaluation of post and core restorations under artificial crowns

Cited by 48 publications

References 33 publications

A Study of the Fracture Resistance of Nyyar Cores of Three Restorative Materials

A Study of the Fracture Resistance of Nyyar Cores of Three Restorative Materials

Fatigue resistance and structural integrity of different types of fiber posts

Influence of Adhesive Systems on Bond Strength between Fiber Posts and Composite Resin Cores in a Pull-out Test Design

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