Effect of dentin surface wetness on tensile bond strength of self adhesive resin cements

Yoon, Seok–Jin; Park, Se Hee; Kim, Jin Woo; Cho, Kyung Mo

doi:10.5395/jkacd.2009.34.2.113

Cited by 3 publications

(3 citation statements)

References 19 publications

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“…Selective enamel etching was performed because Rely-X Unicem studies have shown that phosphoric acid etching of the enamel has a positive effect on adhesion of the cement, whereas etching of the dentin affects the bonding negatively owing to the self-adhesive cement's inability to infiltrate collagen depleted by the etching. 17 Therefore, only the enamel was etched with 37.5% phosphoric acid (Total Etch, Ultradent, South Jordan, UT, USA) for 15 seconds. Preparations were rinsed and blot dried with cotton pellets to avoid desiccation in groups I and II.…”

Section: Cementationmentioning

confidence: 99%

Impact of Overdried Preparation and Thermocycling on the Fracture of CAD–CAM Hybrid Ceramic Occlusal Veneer Restorations

Tantbirojn¹,

Versluis²,

Edgerley³

et al. 2019

International Journal of Prosthodontics and Restorative Dentistry

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Aim: To study the impact of overdried preparations prior to cementation with a self-adhesive resin cement and thermocycling on the fracture of hybrid ceramic occlusal veneer restorations. Materials and methods: Sixty extracted maxillary molars were mounted and sectioned to remove the coronal structure 4 mm above the cementoenamel junction, leaving a flat area of exposed dentin and peripheral enamel. Ultrathin occlusal veneers with 0.3 mm central fossa thickness were milled from CAD-CAM hybrid ceramic (Vita Enamic). Teeth were randomly divided into three groups. After a selective enamel etching with phosphoric acid, groups I and II were blot-dried using cotton pellets; group III was desiccated with pressurized air for 15 seconds prior to cementation with a self-adhesive resin cement (Rely-X Unicem). Groups II and III were thermocycled between 5/55°C for 5000 cycles. The restored teeth were loaded axially until fracture. Fracture patterns were classified as fracture in the veneers only or fracture involving the tooth structure. Results: The fracture strengths (mean ± standard deviation) were 1672 ± 585, 1789 ± 722, and 1586 ± 711 N for groups I (control), II (thermocycled), and III (overdried and thermocycled), respectively. No statistically significant differences were indicated (one-way ANOVA, p = 0.6426). Fracture patterns were significantly different (the Kruskal-Wallis rank sum test for multiple independent samples, p = 0.01315, followed by the Dunn post hoc test), where group III had more fractures in the veneer only than groups I and II. Conclusion: Thermocycling of samples and overdrying of preparations did not show a significant difference in failure strength. However, fracture patterns indicated more veneer-only fractures under desiccated conditions, suggesting compromised restoration bonding.

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Section: Cementationmentioning

confidence: 99%

Impact of Overdried Preparation and Thermocycling on the Fracture of CAD–CAM Hybrid Ceramic Occlusal Veneer Restorations

Tantbirojn¹,

Versluis²,

Edgerley³

et al. 2019

International Journal of Prosthodontics and Restorative Dentistry

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“…More than two hundreds articles have been published but only few concerned about the moisture control of these materials and even then, like wet bonding technique, no one can define the ideal amount or method of moisture control 2-4. To answer the question, we have to consider the chemical reaction of these materials.…”

Section: Amentioning

confidence: 99%

“…Yoon et al reported that the wetness of the dentin does not affect the bond strength of three commercial self-adhesive cements, while Guarda et al reported higher bond strength on the moist dentin than dry dentin, and these results comes from the difference of the moisture control methods 3,4. Under in vivo conditions, if the self-adhesive cements were used for the cementation of an inlay, an onlay or a crown, we have to consider the intrapulpal pressure and dentinal fluid movement.…”

Section: Amentioning

confidence: 99%

'Wet or Dry tooth surface?' - for self-adhesive resin cement

Park

2012

Restor Dent Endod

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Effects of dentin moisture on the push-out bond strength of a fiber post luted with different self-adhesive resin cements

2013

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ObjectivesThis study evaluated the effects of intraradicular moisture on the pushout bond strength of a fibre post luted with several self-adhesive resin cements.Materials and MethodsEndodontically treated root canals were treated with one of three luting cements: (1) RelyX U100, (2) Clearfil SA, and (3) G-Cem. Roots were then divided into four subgroups according to the moisture condition tested: (I) dry: excess water removed with paper points followed by dehydration with 95% ethanol, (II) normal moisture: canals blot-dried with paper points until appearing dry, (III) moist: canals dried by low vacuum using a Luer adapter, and (IV) wet: canals remained totally flooded. Two 1-mm-thick slices were obtained from each root sample and bond strength was measured using a push-out test setup. The data were analysed using a two-way analysis of variance and the Bonferroni post hoc test with p = 0.05.ResultsStatistical analysis demonstrated that moisture levels had a significant effect on the bond strength of luting cements (p < 0.05), with the exception of G-Cem. RelyX U100 displayed the highest bond strength under moist conditions (III). Clearfil SA had the highest bond strength under normal moisture conditions (II). Statistical ranking of bond strength values was as follows: RelyX U100 > Clearfil SA > G-Cem.ConclusionsThe degree of residual moisture significantly affected the adhesion of luting cements to radicular dentine.

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Effect of dentin surface wetness on tensile bond strength of self adhesive resin cements

Cited by 3 publications

References 19 publications

Impact of Overdried Preparation and Thermocycling on the Fracture of CAD–CAM Hybrid Ceramic Occlusal Veneer Restorations

Impact of Overdried Preparation and Thermocycling on the Fracture of CAD–CAM Hybrid Ceramic Occlusal Veneer Restorations

'Wet or Dry tooth surface?' - for self-adhesive resin cement

Effects of dentin moisture on the push-out bond strength of a fiber post luted with different self-adhesive resin cements

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