Demineralized enamel reduces margin integrity of self-etch, but not of etch-and-rinse bonded composite restorations

Körner, Philipp; Sulejmani, Aljmedina; Wiedemeier, Daniel B.; Attin, Thomas; Tauböck, Tobias T.

doi:10.1007/s10266-018-0398-6

Cited by 8 publications

(14 citation statements)

References 42 publications

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“…Where there is no need to do so and the restoration material has a chemical or chemicalmechanical adhesion mechanism, adhesion conditions can be ensured. [22].…”

Section: Resultsmentioning

confidence: 99%

Enamel Conditioning by Phosphoric Acid and Er.Cr: YSGG Laser Irradiation - EDS and SEM Studies

Saveanu¹,

Țănculescu²,

Anistoroaei³

et al. 2019

Rev. Chim.

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This study evaluated the effects of ortophosforic acid and Er.Cr: YSGG LASER on human enamel by means of a field emission in-lens scanning electron microscope. The materials used for conditioning the teeth were SE�35% (Scotchbond� Etchant Phosphoric Acid) and MG6-MZ6 tips with Er, Cr: YSGG laser, 30% water, 60% air, 5.5 W/20 Hz according to manufacturer�s instructions. The acid time of action determines enamel demineralization in all situation. Er.Cr: YSGG laser treatment of non-carious enamel, a laser power of 5.5 W is found to be the optimal to improve the micromorphology of enamel.

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“…Where there is no need to do so and the restoration material has a chemical or chemicalmechanical adhesion mechanism, adhesion conditions can be ensured. [22].…”

Section: Resultsmentioning

confidence: 99%

Enamel Conditioning by Phosphoric Acid and Er.Cr: YSGG Laser Irradiation - EDS and SEM Studies

Saveanu¹,

Țănculescu²,

Anistoroaei³

et al. 2019

Rev. Chim.

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“…One hundred and forty crowns of freshly extracted permanent bovine incisors, stored in tap water until use [ 14 , 17 ], were chosen for this in vitro study. The pulp cavum of each tooth was filled with plasticine (Pelikan, Hanover, Germany) and sealed with nail polish to prevent internal demineralization.…”

Section: Methodsmentioning

confidence: 99%

“…The pulp cavum of each tooth was filled with plasticine (Pelikan, Hanover, Germany) and sealed with nail polish to prevent internal demineralization. The teeth were polished (Sof-Lex Pop-on superfine, 3M ESPE, St. Paul, MN, USA) to remove the cementum layer from the enamel [ 14 , 17 ], and randomly allocated into 14 groups (n = 10 per group). The experimental design is illustrated in Figure 1 .…”

Section: Methodsmentioning

confidence: 99%

“…Specimens of groups 1–5 and 8–12 were demineralized according to a previously established protocol to create artificial carious lesions [ 14 , 17 ]. For this purpose, the teeth were put for 21 days in an acidic solution (pH 4.95) at 37 °C containing 3 mM CaCl 2 ·2H 2 O, 3 mM KH 2 PO 4 , 6 µM MHDP, KOH to adjust the pH to 4.95, 50 mM CH 3 COOH, and distilled water [ 18 ].…”

Section: Methodsmentioning

confidence: 99%

“…One- and two-step self-etch adhesives have been shown to attain similar enamel bond strengths [ 13 ]. A recent study [ 14 ] revealed that the margin integrity of composite restorations bonded with a self-etch adhesive was significantly lower in demineralized enamel than in sound enamel, while no decline in margin integrity was observed in demineralized vs. sound enamel when etch-and-rinse adhesives were used. Other studies proved that margin integrity of composite restorations increased after selective etching of sound enamel before application of a self-etch adhesive [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

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Impact of Different Etching Strategies on Margin Integrity of Conservative Composite Restorations in Demineralized Enamel

et al. 2020

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Good margin integrity with a tight seal of the adhesive interface is considered one of the key factors for the clinical success of composite restorations. This study investigated the effect of enamel etching with phosphoric acid on the margin integrity of self-etch bonded composite restorations in demineralized enamel. Crowns of bovine incisors were assigned into 14 groups (n = 10 per group) of which ten groups (groups 1–5 and 8–12) were demineralized (21 days, acid buffer, pH 4.95) to create artificial carious lesions. Standardized Class V cavities were prepared in all specimens. Demineralized groups were either etched with phosphoric acid for 10, 30, 60, or 120 s (groups 2–5 and 9–12), or no etching was performed (groups 1 and 8). The non-demineralized (sound) groups were etched for 10 s (groups 7 and 14) or remained non-etched (groups 6 and 13). Resin composite restorations were then placed using either a one-step (iBond Self Etch, groups 1–7) or two-step self-etch adhesive (Clearfil SE Bond, groups 8–14). Margin integrity of the restorations was assessed after thermocycling (5000×, 5–55 °C) using scanning electron microscopy, and the percentage of continuous margins (%CM) was statistically analyzed (α = 0.05). Phosphoric acid etching significantly increased %CM in both demineralized and sound enamel. For iBond Self Etch, a significant increase in %CM in demineralized enamel was observed with increased etching times. All etched groups treated with Clearfil SE Bond and those etched for 60 or 120 s and treated with iBond Self Etch showed similar %CM in demineralized enamel as in etched sound enamel, and significantly higher %CM than in non-etched sound enamel. In conclusion, enamel etching with phosphoric acid improves margin integrity of composite restorations in demineralized enamel when bonded with the examined adhesives.

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Composite restorations placed in non‐carious cervical lesions—Which cavity preparation is clinically reliable?

Lührs

Jacker‐Guhr

Günay

et al. 2020

Clinical & Exp Dental Res

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The purpose of this in-vivo study was to evaluate the clinical performance of restorations placed in non-carious cervical lesions (NCCLs), using different cavity preparation designs, after 7.7 years. A total of 85 NCCLs with coronal margins in enamel and cervical margins in dentin were randomly assigned to the following treatment protocols: dentin surface cleaning, dentin surface roughening with round bur plus flowable composite, dentin surface roughening/cervical groove preparation with round bur, dentin surface roughening/cervical groove preparation with round bur plus flowable composite. After enamel beveling and selective enamel etching, the defects were restored with composite. The restorations were assessed by two independent, calibrated and blinded investigators, using modified USPHS criteria. At 7 years (7.7 (± 0.35)), a total of 64 restorations (75.3%) were available for follow-up examination. The total retention rate, irrespective of the test groups, was 82.8%. Restorations placed without any preparation showed the highest loss rate (27.8%). Esthetic appearance, marginal adaptation, anatomic form and marginal discoloration did not differ significantly between the groups. Composites are long-term stable materials for restoring NCCLs. Restorations placed without any dentin preparation (cavity cleaning only) showed the highest loss rate.

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Demineralized enamel reduces margin integrity of self-etch, but not of etch-and-rinse bonded composite restorations

Cited by 8 publications

References 42 publications

Enamel Conditioning by Phosphoric Acid and Er.Cr: YSGG Laser Irradiation - EDS and SEM Studies

Enamel Conditioning by Phosphoric Acid and Er.Cr: YSGG Laser Irradiation - EDS and SEM Studies

Impact of Different Etching Strategies on Margin Integrity of Conservative Composite Restorations in Demineralized Enamel

Composite restorations placed in non‐carious cervical lesions—Which cavity preparation is clinically reliable?

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