Effect of fiber-premixed indirect resin composite substructure on fracture resistance of MOD composite inlays adhered with two different adhesive resin cements

SUMMARY This study investigated the effect of loading on the bond strength to dentin and microleakage of MOD indirect composite restorations bonded with self-adhesive and self-etching resin cements with or without acid etching of the proximal enamel margins. Class II MOD cavities were prepared in 48 molar teeth into dentin and divided into three groups of 16 teeth. Impressions were taken and indirect composite inlays fabricated (Estenia C & B). The enamel margins of the proximal boxes of half the specimens were phosphoric acid etched, and the inlays were cemented with one of three cements (Panavia F 2.0, SA Cement, or Rely X Unicem). After luting, eight teeth in each cement group were mechanically loaded at 2.5 cycles/s for 250,000 cycles. Unloaded teeth acted as controls. Teeth were stored in Rhodamine B solution for 24 hours, sectioned buccolingually at the proximal boxes to examine microleakage using confocal microscopy, and further sectioned for μTBS testing of the resin-dentin interface. Analysis of variance was performed to assess the effect of loading and acid etching on microleakage and bond strength. Acid etching had no effect on microleakage. No significant difference in the dentin bond strengths between the three cements existed after loading. Panavia F 2.0 exhibited a significant reduction in bond strength. With regard to microleakage at the proximal boxes, loading had no effect on dye penetration at the cavity floor. However, at the axial walls, loading had a significant deleterious effect on Panavia F 2.0. No difference in microleakage existed between the three cements at both sites before and after loading. In conclusion, the two tested self-adhesive cements exhibited similar bond strengths before and after loading to the self-etching resin cement. Loading reduced dentin bond strengths and increased microleakage at the resin-dentin interface. However, acid etching of the enamel margins had no significant effect on microleakage in the approximal regions of the bonded inlays.

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Effect of Surface Treatment on Microtensile and Micromorphological Patterns of Self-Adhesive Resin Cements/Indirect Resin Composite Restoration Interface: A literature review

Mansoura Journal of Dentistry ◽

10.21608/mjd.2016.201764 ◽

2016 ◽

Vol 3 (10) ◽

pp. 49-64

Keyword(s):

Literature Review ◽

Surface Treatment ◽

Resin Composite ◽

Resin Cements ◽

Adhesive Resin ◽

Effect Of Surface ◽

Composite Restoration

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FRACTURE RESISTANCE OF LITHIUM DI SILICATE, INDIRECT RESIN COMPOSITE AND ZIRCONIA BY USING DUAL CURE RESIN CEMENTS

Clinical and Experimental Health Sciences ◽

10.33808/clinexphealthsci.797126 ◽

2020 ◽

Author(s):

Mohammed BADWAN ◽

Erkut KAHRAMANOĞLU

Keyword(s):

Fracture Resistance ◽

Resin Composite ◽

Resin Cements

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Durability of the adhesive cementation to the dentin substract

RGO - Revista Gaúcha de Odontologia ◽

10.1590/1981-863720160002000022994 ◽

2016 ◽

Vol 64 (2) ◽

pp. 132-139

Author(s):

Rodivan BRAZ ◽

Márcia de Almeida DURÃO ◽

Gabriela Luna Santana GOMES ◽

Fabio Barbosa DE SOUZA ◽

Eliane Alves LIMA

Keyword(s):

Resin Composite ◽

Microtensile Bond Strength ◽

Resin Cements ◽

Adhesive Resin ◽

Mean Values ◽

Adhesive Cementation ◽

Pre Treatment ◽

One Year ◽

The One

ABSTRACT Objective The aim of this study was to evaluate, in vitro, the union stability of resin cements to the dental substract through microtensile bond strength (µTBS) analysis and scanning electron microscopy (SEM). Methods Fifty-four third human molars, stored in water for a short (24 hours) and long period of time (1 year) presented a flat oclusal superficial dentin. The teeth were distributed in six different groups: G1- Panavia F2.0/Kuraray; G2- RelyXUnicem/3M ESPE; G3- G-Cem/GC; G4- Biscem/ Bisco; G5- Panavia F2.0/Kuraray without pre-treatment and G6- Multilink Sprint/Ivoclar-Vivadent which were adhered to its respective indirect resin composite restoration, (G1- Clearfil AP-X/Kuraray; G2- Filtek Z350/3M ESPE; G3- Gradia Direct X(tm)/GC; G4- Aelite(tm)/ Bisco; G5- Clearfil AP-X/Kuraray; G6- Tetric Ceram/ Ivoclar-Vivadent). The resin blocks were cemented and the sticks were obtained by tooth, with an area of adhesive interface of 0,8mm² (±0,2). Results The mean values, submitted to Mann-Whitney and Kruskal-Wallis tests (α = 5%) were in MPa after 24 hours: G1 = 9.66 (A), G2 = 13.37 (A); G3 = 15.89 (A); G5 = 4.18 (B); G6 = 11.01 (A) and after 1 year: G1 = 9.75 (A), G2 = 11.73 (A); G3 = 20.10 (B); G5 = 6.80 (A); G6 = 21.09 (B). All G4 group presented pretest failures. Conclusion During the one year period, with the exception of BisCem, the self-adhesive resin cements were a favorable alternative for the adhesive cementation, standing out among these, the G-Cem and Multilink Sprint.

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