Assessment of post-contamination treatments affecting different bonding stages to dentin

Elkassas, Dina; Arafa, Abla

doi:10.4103/1305-7456.184159

Cited by 12 publications

(20 citation statements)

References 21 publications

(21 reference statements)

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“…The time span during which the contaminant interacts with the dentin surface is of significant importance, as longer contamination time results in lower bond strengths than drying the saliva quickly. [22] This observation was related to evaporation of water and formation of a thick film of glycoprotein on the contaminated surfaces. The duration of contamination varies significantly among studies and it is a factor that should be particularly considered when comparing their findings.…”

Section: Discussionmentioning

confidence: 99%

“…Another possible explanation suggests that rinsing and air-drying provides a collapsed layer of resin deprived collagen which cannot be effectively penetrated. [22,23] Conversely, several studies concluded that there was no adverse effect on bond strength values of two-step self-etching adhesives when contamination occurred after light-curing. [17,25] This can be possibly explained by the simultaneous demineralization and infiltration achieved by these systems.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Decontamination Procedures on Marginal and Internal Adaptation in Saliva Contaminated Resin Composite Restorations

Pappa

Masouras

Margaritis

et al. 2020

Preprint

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Background: The aim of this study was to evaluate the effect of natural saliva contamination of dentin, on marginal and internal adaptation of resin-composite restorations performed with an etch-and-rinse adhesive and determine the efficiency of various decontamination techniques. Methods: A hundred and twenty human molars and premolars were randomly distributed into six groups (n=20). Enamel was removed and standardized dentin cavities (diameter: 3 mm, depth: 2 mm) were filled with a two-step etch-and-rinse adhesive and resin-composite under six different surface treatments: (1) adhesive application following manufacturers’ instructions (control); (2) dentin etching, 5-s saliva, 5-s air-dry, adhesive; (3) dentin etching, 5-s saliva, 10-s water-rinse, 5-s air-dry, adhesive; (4) adhesive application/light-cure, 5-s saliva, 5-s air-dry; (5) adhesive application/light-cure, 5-s saliva, 10-s water-rinse, 5-s air-dry; (6) adhesive application/light-cure, 5-s saliva, 10-s water-rinse, 5-s air-dry, adhesive reapplication. Wall adaptation was evaluated at the upper surface and at two consecutive depth levels of 0.5mm each, by measuring the length of the debonded margins relative to the cavity periphery (%DM) and the width of the maximum marginal gap (MG). Results: Statistically significant differences occurred among groups, presenting inferior adaptation after contamination took place. Group (1) at the upper surface presented the most satisfactory adaptation, whereas, groups (4) and (5) had the significantly poorest adaptation in all surfaces. Groups (2), (3), and (6) revealed no statistically significant differences in comparison to group (1). Conclusion: Saliva contamination resulted in deterioration of marginal and internal adaptation when it occurred after the adhesive application. Reapplication of the adhesive restored DM and MG values.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of Decontamination Procedures on Marginal and Internal Adaptation in Saliva Contaminated Resin Composite Restorations

Pappa

Masouras

Margaritis

et al. 2020

Preprint

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“…The results are in agreement with Furuse et al [35], who reported that the re-etching of a cured adhesive eliminated contaminated residue and removed the adhesive coating. The re-bonding after a re-etching procedure assists in the refurbishing of patent adhesives for bonding [8].…”

Section: Discussionmentioning

confidence: 99%

“…Dias Damé JL [7] concluded that water rinsing is a reliable procedure for cavity decontamination. Dina Elkassas et al [8] recommended re-etching rebonding of the affected dentin surface while Juneja R et al [9] suggested the application of NaOCl for the recovery of the bonding potential on the contaminated tooth surface. Few researchers suggest resurfacing with a rotary instrument, followed by water irrigation and reapplication of an adhesive system [10].…”

mentioning

confidence: 99%

Effect of Decontamination Treatments on Micro-Shear Bond Strength between Blood–Saliva-Contaminated Post-Etched Dentin Substrate and Composite Resin

et al. 2019

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Blood–saliva contamination negatively affects the bonding potential of adhesive agents. The study aimed to assess the effect of various cleaning protocols on micro-shear bond strength (μSBS) between blood–saliva-contaminated post-etched dentin and composite resin in total-etch and self-etch adhesives. The cleaning methods tested were water rinsing, 37.5% phosphoric acid (H3PO4) re-etching, 6% sodium hypochlorite (NaoCl), 2% chlorhexidine gluconate (CXG), isopropyl alcohol (IPA), and pumice. Nono-hybrid composite cylinders with a 3-mm diameter and 2-mm height were directly cured over the dentin substrate, stored for 24 h, and subjected to 12,000 thermocycles. The shear force was exerted with a 200-μm knife-edged chisel-shaped head from a universal testing machine. The type of failure was assessed with stereomicroscope magnified images. The obtained data were evaluated by Kruskal–Wallis and Mann–Whitney U post-hoc tests. Water-rinsed contaminated dentin surfaces showed substantially reduced μSBS in the total etch from 25.93 to 20.29 Mpa and the corresponding values for the one-step self-etch adhesive were 10.10 to 8.8. Re-etching with 37.5% H3Po4 resulted in a recovery of bonding potential in both total-etch (24.58 Mpa) and self-etch adhesive (9.23 Mpa). Alternately, NaoCl and pumice cleaning showed promising results for the total-etch (23.51 Mpa) and self-etch (7.79 Mpa).

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“…18 On the other hand, if contamination occurs before polymerization, solvents such as acetone can be used as decontaminants because of their ability to remove unpolymerized monomers. 19 However, if contamination occurs after polymerization of the adhesive, the salivary glycoproteins will attach to the previously polymerized adhesive structure, forming a barrier that prevents the copolymerization of the composite resin, thus affecting the quality of adhesion. 20 The main objective of this study is to evaluate the influence of two saliva decontamination protocols on the adhesive strength of a composite resin to dentin at 24 hours and 6 months after the adhesion procedure, according to the following null hypotheses: 1) Saliva contamination followed by decontamination does not influence the bond strength results;…”

Section: Introductionmentioning

confidence: 99%

Effect of saliva decontamination protocol on the adhesion to dentin with a universal adhesive

Chasqueira¹,

Luís²,

Portugal³

2019

j.rpemd

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To evaluate the influence and effectiveness of the salivary decontamination protocol after polymerization of a universal adhesive on dentin adhesive strength, after 24 hours and 6 months of ageing. Methods: Fifty intact molars were sectioned in order to obtain two slices of dentin from each tooth. In all specimens except the control group (C-no contamination), after applying and light-curing the adhesive system (Scotchbond Universal), the adhesion surface was contaminated with human saliva, and was then subjected to a decontamination method that differed between groups (W-decontamination with water; W+A-decontamination with water and reapplication of adhesive; E-decontamination with ethanol; E+A-decontamination with ethanol and reapplication of adhesive). Shear bond strength was tested at 24 hours and 6 months of aging, until fracture, and the failure mode was observed. Data were statistically analyzed using non-parametric Mann-Whitney and Kruskal-Wallis tests (α=0.05). Results: At 24 hours of aging, the decontaminant (p=0.289) and the reapplication of the adhesive (p=0.072) did not influence the adhesive strength values, and all contaminated groups obtained significantly (p<0.05) lower adhesive strength values than the control group. At 6 months, the reapplication of the adhesive (W+A and E+A) provided increased adhesion values (p=0.001), but no differences were observed between the decontaminants (p=0.314). Only the W+A group yielded a statistically (p=0.376) similar value to the control group. Conclusion: When there is salivary contamination of the adhesion area after polymerization of the universal adhesive tested, water decontamination should be performed followed by a

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Assessment of post-contamination treatments affecting different bonding stages to dentin

Cited by 12 publications

References 21 publications

Effect of Decontamination Procedures on Marginal and Internal Adaptation in Saliva Contaminated Resin Composite Restorations

Effect of Decontamination Procedures on Marginal and Internal Adaptation in Saliva Contaminated Resin Composite Restorations

Effect of Decontamination Treatments on Micro-Shear Bond Strength between Blood–Saliva-Contaminated Post-Etched Dentin Substrate and Composite Resin

Effect of saliva decontamination protocol on the adhesion to dentin with a universal adhesive

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