The effect of hybrid layer thickness on bond strength: demineralized dentin zone of the hybrid layer

Hashimoto, Masanori; Ohno, Hiroki; Endo, Kazuhiko; Kaga, Masayuki; Sano, Hidehiko; Oguchi, Haruhisa

doi:10.1016/s0109-5641(00)00035-x

Cited by 149 publications

(150 citation statements)

References 11 publications

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“…As a consequence of over-etching, the thick layer of demineralised collagen is not capable of being completely impregnated by adhesives containing monomers with relatively high viscosity, such as Bis-GMA [16,17].…”

Section: Discussionmentioning

confidence: 99%

Influence of caries infiltrant contamination on shear bond strength of different adhesives to dentin

et al. 2012

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OBJECTIVES: To analyze whether the contamination with a caries infiltrant system impairs the adhesive performance of etch-and-rinse and self-etching adhesives on dentin. MATERIALS AND METHODS: Dentin contamination with the caries infiltrant system (Icon, DMG) was simulated by applying either hydrochloric acid (15 % HCl, Icon Etch, 15 s), the resin infiltrant (Icon infiltrant, 4 min), or both prior to the application of the respective adhesives (each group n = 10). In the control groups, the etch-and-rinse adhesive (Optibond FL, Kerr) and the self-etching adhesive (iBOND Self Etch, Hereaus) were applied without former contamination with the infiltrant system. Additionally, the adhesive performance of the resin infiltrant alone was tested. Shear bond strength of a nano-hybrid composite was analyzed after thermocycling (5,000×, 5-55°C) of the specimens and analyzed by ANOVA/Scheffé post hoc tests (p < 0.05) and Weibull statistics. Failure mode was inspected under a stereomicroscope at × 25 magnification. RESULTS: Contamination with the resin infiltrant alone did not impair shear bond strength, while contamination with hydrochloric acid or with hydrochloric acid and the resin infiltrant reduced shear bond strength (MPa) of the adhesives (Optibond FL: 20.5 ± 3.6, iBOND Self Etch: 17.9 ± 2.6) significantly. Hydrochloric acid contamination increased the number of adhesive failures. The adhesive performance of the caries infiltrant system alone was insufficient. CONCLUSION: The contamination with the caries infiltrant system impaired the shear bond strength of conventional dental adhesives. CLINICAL RELEVANCE: Contamination of the caries infiltrant system on dentin should be avoided due to the detrimental effect of hydrochloric acid etching. Clinical relevance: Contamination of the caries infiltrant system on dentin should be avoided due to the detrimental effect of hydrochloric acid etching.3

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Section: Discussionmentioning

confidence: 99%

Influence of caries infiltrant contamination on shear bond strength of different adhesives to dentin

et al. 2012

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“…[12][13][14][15][16][17][18][19][20][21] Moreover, a lack of the resin infiltration has been found at the fractured surface after bond testing. [22][23][24][25][26][27] Water penetration to the adhesive interfaces via a bond defect (i.e., nanoleakage or the demineralized dentin zone) might induce bond deterioration due to the hydrolysis of the collagen fibrils or resin materials. Resin infiltration is clearly observed in Figure 3.…”

Section: Discussionmentioning

confidence: 99%

Deproteinizing effects on resin–tooth bond structures

et al. 2003

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This study investigated the effects of NaOCl on resin-tooth bonds to simulate the situations of long-term durability and caries invasion. Resin-tooth bonded specimens were produced with the use of two resin adhesives (Excite and One-Bond). Resin-tooth bonded beams (adhesive area; 0.9 mm 2 ) were serially sectioned and the specimens were immersed in 10% NaOCl medium for 0 (control), 2, 4, and 6 h after being stored in water for 24 h. After immersion, microtensile bond tests were performed. SEM fractography was conducted to calculate each failure mode by image analysis. In addition, the adhesive interface was examined with the use of TEM. In the control specimens, enamel bond strengths had no difference between Excite (45.6 ؎ 15.0) and One-Bond (56.9 ؎ 12.9). On the other hand, dentin bond strengths had significant difference between Excite (80.6 ؎ 21.2) and One-Bond (50.7 ؎ 11.2). The bond strengths decreased with increased storage time for both systems with enamel and dentin bonds. The deteriorated mineralized dentin of beams resulted in bondstrength reduction for resin-enamel bonds. For dentin bonding, the adhesive interface was gradually dissolved from the outer to the center portion of the beam. The depletion of collagen fibrils within the demineralized dentin or hybrid layer deformation was found under SEM and TEM examinations. These morphological changes are responsible for bond strength reduction of resin-dentin bonds.

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“…In vitro and in vivo studies have found the efficacy of adhesive systems differ greatly among the various types and brands of systems. 2,26 The efficacy has been shown to depend on numerous factors, such as infiltration of the adhesive into the demineralized tissue, [27][28][29][30] the degree of conversion and strength of the adhesive, [31][32] the mechanical properties of the resin composite 33 and compatibility between the resin composite Operative Dentistry 54 and adhesive-treated dentin surface as regards sensitivity of the resin composite initiator system to an acidic environment 34 and surface energy parameters. 35 In the current study, the two-step self-etch adhesive system Adper SE Plus presented significantly higher SBS values than the etch&rinse adhesive system tested for both nano-composites.…”

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confidence: 99%

Shear Bond Strength of Three Different Nano-Restorative Materials to Dentin

Korkmaz¹,

Gürgan²,

Fırat³

et al. 2010

Operative Dentistry

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Nano glass ionomer exhibited significantly lower shear bond strength compared to nano-composites. The self-etch adhesive showed higher shear bond strength than etch&rinse adhesive for both nanofill and flowable nanofill composites. Materials and Methods: Sixty human molars were ground flat, exposing the dentin surfaces, and they were randomly divided into five groups according to the restorative materials and adhesive systems used (n=12/group). The restoratives were applied to all dentin surfaces according to the manufacturer's instructions, using a special jig (Ultradent) in the following manner: Group 1: a nano-composite (NC) (Filtek Supreme XT-3M ESPE) was applied with a two-step self-etch adhesive (SE) (Adper SE Plus-3M ESPE); Group 2: NC was applied with an etch&rinse adhesive (SB) (Adper Single Bond 2-3M ESPE); Group 3: a flowable nano-composite (FNC, Filtek Supreme XT Flow-3M ESPE) was applied with SE; Group 4: FNC was applied with SB and Group 5: a nanofilled resin-modified glass ionomer (Ketac N100-3M ESPE) was applied with Ketac Nano Primer (3M ESPE). The bonded specimens were stored in distilled water (37°C, 24 hours) and tested for SBS in a universal testing machine (1 mm/minute). Two specimens from each group were subjected to SEM evaluations of the adhesive interfaces. Failure modes were determined using a stereomicroscope. The mean SBS values were calculated and the data were analyzed with the Kruskal Wallis and Mann-Whitney-U tests (p<0.05). Results: Mean SBS values (MPa) for the groups were 13.64; 7.83; 11.20; 4.12 and 0.64 for Groups 1, 2, 3, 4 and 5, respectively. Group 1 exhibited a significantly higher value than all the other groups; whereas, Group 5 had the lowest value (p<0.05). The SE adhesive yielded higher bond values than the SB adhesive with NC

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The effect of hybrid layer thickness on bond strength: demineralized dentin zone of the hybrid layer

Cited by 149 publications

References 11 publications

Influence of caries infiltrant contamination on shear bond strength of different adhesives to dentin

Influence of caries infiltrant contamination on shear bond strength of different adhesives to dentin

Deproteinizing effects on resin–tooth bond structures

Shear Bond Strength of Three Different Nano-Restorative Materials to Dentin

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