Effect of amalgam corrosion products in non-discolored dentin on the bond strength of replaced composite resin

Ghavamnasiri, Marjaneh; Eslami, Samaneh; Ameri, H; Chasteen, Joseph E.; Majidinia, Sara; Moghadam, Fatemeh Velayaty

doi:10.4103/0972-0707.148884

Cited by 2 publications

(1 citation statement)

References 18 publications

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“…In the present study, dentin bond strength was negatively affected by amalgam contamination. These results are in agreement with previous works of Harnirattisai et al 15 and Ghavamnasiri et al 16 Ghavamnasiri et al 16 compared SBS of composite resin to different groups of discolored dentin after amalgam removal. They found a significant difference in bond strength between normal dentin and the discolored non-modified dentin after storage for 6 months, but not between those where 0.5-mm dentin was removed and stored for different periods of time and the non-modified groups.…”

Section: Discussionsupporting

confidence: 92%

The Effects of Amalgam Contamination and Different Surface Modifications on Dentin Shear Bond Strength When Using Different Adhesive Protocols

Alshehri¹,

Bin-Shuwaish²

2021

CCIDE

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Purpose To evaluate the effect of amalgam contamination, different surface treatments, and adhesive protocols on dentin shear bond strength (SBS) to bulk-fill composite resin material. Materials and Methods Eighty teeth were fixed in molds, and the dentin was exposed and then polished. Sixty teeth were restored by amalgam and thermocycled to 10,000 cycles (5°C and 55°C, 30-second dwell time). The rest were restored with composite materials without amalgam predecessor. The samples were divided into G1 (with dentin pretreatment with 2% chlorhexidine gluconate), G2 (0.5 mm of dentin was removed), G3 (no surface modification), and G4 (samples were restored with bulk-fill composite). The bonded specimens were subdivided based on the adhesive protocol of the universal adhesive system used into etch-and-rinse and self-etch groups. Acid etching was done using 32% phosphoric acid. Composite resin was used for build-up using mold and glass. Specimens were cured and left for 24 h in distilled water at room temperature for polymerization reaction, underwent thermocycling for 5000 cycles, and were subjected to knife-edge shear bond testing. Descriptive statistics, independent t -tests, and one-way analysis of variance followed by pairwise comparisons were used to analyze the results. Results The highest mean SBS values were found in the control group where acid etching was used (24.46±2.24 MPa), followed by self-etching in the same group (21.92±2.54 MPa). Lower SBS values were associated with the amalgam-contaminated group. The lowest values were found in the dentin refreshment group when the self-etching mode was used (13.59±1.73 MPa). Chlorhexidine treatment improved the mean SBS value compared with the no treatment or dentin refreshment groups for both adhesive protocols. Conclusion Amalgam contamination may affect SBS values. Acid etching improved SBS for non-contaminated dentin. Chlorhexidine improved SBS for amalgam-contaminated dentin as a surface treatment but had no significant effect.

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Section: Discussionsupporting

confidence: 92%

The Effects of Amalgam Contamination and Different Surface Modifications on Dentin Shear Bond Strength When Using Different Adhesive Protocols

Alshehri¹,

Bin-Shuwaish²

2021

CCIDE

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Retrospective Study of Survival Rates According to the Type of Dental Restoration of Proximal Caries in Primary Molars

Jih¹,

Lee

Lee³

2015

THE JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY

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Restorative dental materials have advanced rapidly, with improved physical properties that improve survival rates. Accordingly, various materials can be selected. Amalgam, composite resin, glass-ionomer cement, and preformed stainless steel crowns have all been used widely for the restoration of dental caries in primary molars. The various dental materials used to treat proximal caries in the primary molars have distinct advantages and disadvantages. However, few studies have examined their survival rates. This retrospective study examined the 2-year survival rates of more than 700 class II restorations of proximal caries in primary molars clinically and radiologically according to the type of restoration. The study results should help in the selection of class II restorations for molars, one of the biggest concerns of pediatric dentists.

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Effect of amalgam corrosion products in non-discolored dentin on the bond strength of replaced composite resin

Cited by 2 publications

References 18 publications

The Effects of Amalgam Contamination and Different Surface Modifications on Dentin Shear Bond Strength When Using Different Adhesive Protocols

The Effects of Amalgam Contamination and Different Surface Modifications on Dentin Shear Bond Strength When Using Different Adhesive Protocols

Retrospective Study of Survival Rates According to the Type of Dental Restoration of Proximal Caries in Primary Molars

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