Dentin deproteinization effect on bond strength of self-adhesive resin cements

Lisboa, Danielle Sampaio; Santos, Silvando Vieira dos; Griza, Sandro; Rodrigues, João Lima; Faria-e-Silva, André Luís

doi:10.1590/s1806-83242013000100013

Cited by 17 publications

(17 citation statements)

References 10 publications

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“…Selfadhesive resin cements on the other hand, were developed to simplify the technique-sensitive multistep procedures. When applied directly on the smear layer covering the dentin, with no pretreatments, the acidic monomers within self-adhesive cements could demineralize the dentin and infiltrate through the mineralized tissue [18][19][20][21]. However, commercially available self-adhesive cements show variations in the amount of acidic monomers in their composition [22,23].…”

Section: Introductionmentioning

confidence: 99%

Adhesive strength of self-adhesive resins to lithium disilicate ceramic and dentin: effect of dentin chelating agents

2014

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The aim of this study was to test the effect of different chelating agents on microtensile bond strength (MTBS) of self-adhesive resin cements to dentin. The occlusal surfaces of extracted human mandibular molars (N = 80) were cut horizontally to expose sound dentin. The teeth were randomly divided into four groups (n = 20 per group) and dentin surfaces were conditioned according to one of the following methods: group C: no treatment (control group); group CH: 0.2 % chitosan; group E: 17 % ethylene diamine tetra acetic acid (EDTA) and group P: 25 % polyacrylic acid (PAA). Lithium disilicate glass ceramic (e.max CAD) blocks were cemented to conditioned dentin surfaces with self-adhesive cements (RelyX Unicem or Clearfil SA) and photo-polymerized. Specimens were stored in distilled water at 37°C for 24 h and thermocycled for 6,000 times. The beams were obtained from bonded ceramic-cement-tooth assemblies and were subjected to the MTBS test (1 mm/min). Failure types were analyzed and selected beams were examined under scanning electron microscope. Data (MPa) were analyzed using two-way ANOVA and Tukey's test (P < 0.05). While cement type significantly affected the MTBS results (P < 0.05), no significant difference was observed between the dentin chelating agents (P = 0.785). Interaction terms were not significant (P = 0.114). Control group with no dentin conditioning presented significantly lower results with both cements (RelyX Unicem: 8.1 ± 1.9(a), Clearfil SA: 8 ± 1.6(a)) than those of conditioned groups (19.3 ± 4.2(b)-24.5 ± 5.2(b)) (P < 0.05). Failure types were predominantly adhesive in all groups. Chitosan (2 %), EDTA (17 %) or PAA (25 %) could all be used as dentin chelating agents in conjunction with self-adhesive resin cements tested. Abstract:The aim of this study was to test the effect of different chelating agents on microtensile bond strength (MTBS) of self-adhesive resin cements to dentin. The occlusal surfaces of extracted human mandibular molars (N=80) were cut horizontally to expose sound dentin. The teeth were randomly divided into 4 groups (n=20 per group) and dentin surfaces were conditioned according to one of the following methods: Group C: No treatment (Control group); Group CH: 0.2% chitosan; Group E: 17% ethylene diamine tetra acetic acid (EDTA) and Group P: 25% polyacrylic acid (PAA). Lithium disilicate glass ceramic (e.max CAD) blocks were cemented to conditioned dentin surfaces with self-adhesive cements (RelyX Unicem or Clearfil SA) and photo-polymerized.Specimens were stored in distilled water at 37 o C for 24 hours and thermocycled for 6000 times.The beams were obtained from bonded ceramic-cement-tooth assemblies and they were subjected to the MTBS test (1 mm/min). Failure types were analyzed and selected beams were examined under scanning electron microscope. Data (MPa) were analyzed using two-way ANOVA and Tukey's test (P<0.05). While cement type significantly affected the MTBS results (P<0.05), no significant difference was observed between the dentin chelating agents (...

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Section: Introductionmentioning

confidence: 99%

Adhesive strength of self-adhesive resins to lithium disilicate ceramic and dentin: effect of dentin chelating agents

2014

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“…It is capable of producing chemical alterations on the surface of demineralized dentin making it more similar to enamel (hydroxyapatite-rich) [5]. In order to improve adhesion between the dentin and resin materials concentrations of 10% applied for 1 min [26,27] and 5% for 2 min [19,22,24,25] have been used. The most porous surface achieved after this pre-treatment could be responsible for adhesive interfaces with similar bond strength values to those obtained in enamel after etching with phosphoric acid [28], thereby allowing mechanical retention [29,30] and chemical interaction [31].…”

Section: Discussionmentioning

confidence: 99%

“…In accordance with the strategy of cementation the specimens were distributed into four groups (n ¼8): RelyX ARC/Single Bond 2 (RAc) following the manufacturer's instructions (control), RelyX ARC/Single Bond 2 (RAd) after dentin deproteinization; RelyX U200 (RUc) following the manufacturer's instructions; RelyX U200 (RUd) after dentin deproteinization (Table 1). For the deproteinization, dentin surface was treated with 5% sodium hypochlorite (NaOCl) (Vetec, Rio de Janeiro, RJ, Brazil) for 2 min and rinsed for 30 s [19,22,24,25]. The cementation was done following the manufacturer´s instructions (Table 1).…”

Section: Restorative Proceduresmentioning

confidence: 99%

“…On the other side, it has been shown that the pretreatment with phosphoric acid can result in reduction of the bond strength since the exposition of collagen fibrils after dentin demineralization reduced the penetration of the cement [18,19]. The collagen removal after etching with phosphoric acid could be an option to eliminate this mechanical barrier and improve the penetration [20] and the chemical interactions between resin cements and the hydroxyapatite of the dentin [21], providing optimized results.…”

Section: Introductionmentioning

confidence: 99%

“…Some studies have shown that collagen removal has a beneficial effect in the cement-dentin adhesion [19,22] but to the extent of our knowledge no experiments have been performed to evaluate this technique after aging under thermocycling. Therefore, this in vitro study examined the effect of deproteinization on the microtensile bond strength (mTBS) and nanoleakage (NL) between conventional and self-adhesive resin cements and dentin surfaces after 24 h or 20,000 thermocycles.…”

Section: Introductionmentioning

confidence: 99%

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Deproteinization stabilises dentin bonding of self-adhesive resin cements after thermocycling

Souza

Rodrigues

Feitosa

et al. 2016

International Journal of Adhesion and Adhesives

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a b s t r a c tThis study examined the effect of deproteinization on the microtensile dentin bond strength (mTBS) and nanoleakage (NL) of conventional and self-adhesive resin cements after 24 h or after 20,000 thermocycles. Occlusal dentin of thirty-two human molars were distributed into four groups according to the type of cement used: conventional or self-adhesive; and the strategy of luting: RelyX ARC/Single Bond 2 (RAc) following the manufacturer's instructions (control), RelyX ARC/Single Bond 2 (RAd) applied after dentin deproteinization; RelyX U200 (RUc) following the manufacturer´s instructions (control); RelyX U200 (RUd) applied after dentin deproteinization. The specimens were cut into non-trimmed dentincomposite sticks and the half sticks of each group were subdivided into two subgroups: 24 h water storage and after 20,000 thermal cycles, before microtensile bond test. For NL, 5 bonded sticks from each subgroup were prepared and analyzed under SEM. Three-way ANOVA showed that the dentin deproteinization increased the mTBS of both cements, although the RAd group showed a decrease on the mTBS after thermocycling. Chi-square test showed significant loss of specimens by premature failure for the groups after thermocycling, except for the RUd group. The dentin deproteinization improved the initial mTBS and decreases the NL of both cements tested, but, after thermocycling, this technique is only effective for RelyX U200.

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Micromorphology and bond strength evaluation of adhesive interface of a self-adhering flowable composite resin-dentin: Effect of surface treatment

Shafıei

Saadat

2016

Microsc. Res. Tech.

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This study evaluated the effect of dentin surface treatment on the micromorphology and shear bond strength (SBS) of a self-adhering flowable composite, Vertis Flow (VF). Flat dentin surfaces obtained from sixty extracted human molars were divided into six groups (n = 10) according to the following surface treatments: (G1) control, no treatment; (G2) self-etching adhesive, Optibond All-in-One; (G3) phosphoric acid etching for 15 s; (G4) polyacrylic acid for 10 s; (G5) EDTA for 60 s; and G6) sodium hypochlorite (NaOCl) for 15 s. After restoration using VF, SBS was measured in MPa. Data were analyzed using one-way ANOVA and Tamhane test (α = 0.05). Six additional specimens were prepared for scanning electron microscopy analysis. SBS was significantly affected by surface treatment (P < 0.001). SBS of six groups from the highest to the lowest were as follows: (G3) 13.5(A); (G5) 8.98(AB); (G2) 8.85(AB); (G4) 8.21(AB); (G1) 7.53(BC); and (G6) 4.49(C) (groups with the same superscript letter were statistically similar). Morphological analysis revealed numerous long resin tags at the adhesive interface for acid-etched group, with a few short resin tags for the control group and small gap formation for NaOCl-treated group. In conclusion, dentin surface treatments tested differently affected bonding performance of VF; only acid-etching effectively improved this.

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Dentin deproteinization effect on bond strength of self-adhesive resin cements

Cited by 17 publications

References 10 publications

Adhesive strength of self-adhesive resins to lithium disilicate ceramic and dentin: effect of dentin chelating agents

Adhesive strength of self-adhesive resins to lithium disilicate ceramic and dentin: effect of dentin chelating agents

Deproteinization stabilises dentin bonding of self-adhesive resin cements after thermocycling

Micromorphology and bond strength evaluation of adhesive interface of a self-adhering flowable composite resin-dentin: Effect of surface treatment

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