Bonding potential of self-adhesive luting agents used at different temperatures to lute composite onlays

Cantoro, Amerigo; Goracci, Cecilia; Carvalho, Carlos; Coniglio, Ivanovic; Ferrari, Marco

doi:10.1016/j.jdent.2009.02.006

Cited by 38 publications

(51 citation statements)

References 26 publications

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“…Although resin-based materials were heated to 50º C in most studies evaluating the effects of temperature, 10,11,[14][15][16] one could state that such a high temperature could damage the pulp tissue. However, it has been demonstrated that an increase in the temperature of resin composites to temperatures ranging between 54º C and 60º C does not significantly change the intrapulpal temperature.…”

Section: Discussionmentioning

confidence: 99%

“…However, only few studies have evaluated the effects of pre-heating on the DC and mechanical properties of dual-cured RCs. [14][15][16] Therefore, the aim of this study was to evaluate the effects of pre-heating on the DC and ultimate tensile strength (UTS) of dual-cured RCs subjected to different curing conditions. The research hypothesis was that dual-cured RCs heated to 50º C prior to and during polymerization exhibit higher DC and UTS than the RCs polymerized at 25º C when polymerization relied solely on the self-curing condition or after exposure to the severely attenuated curing light due to the presence of an indirect composite resin restoration.…”

Section: Introductionmentioning

confidence: 99%

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Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength

2011

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This study evaluated the degree of conversion (DC) and ultimate tensile strength (UTS) of dual-cured resin cements heated to 50º C prior to and during polymerization. Disc-and hourglass-shaped specimens of Rely X ARC (RX) and Variolink II (VII) were obtained using addition silicon molds. The products were manipulated at 25º C or 50º C and were subjected to 3 curing conditions: light-activation through a glass slide or through a pre-cured 2-mm thick resin composite disc, or they were allowed to self-cure (SC). All specimens were dark-stored dry for 15 days. For DC analysis, the resin cements were placed into the mold located on the center of a horizontal diamond on the attenuated total reflectance element in the optical bench of a Fourier Transformed Infrared spectrometer. Infrared spectra (n = 6) were collected between 1680 and 1500 cm -1 , and DC was calculated by standard methods using changes in ratios of aliphatic-to-aromatic C=C absorption peaks from uncured and cured states. For UTS test, specimens (n = 10) were tested in tension in a universal testing machine (crosshead speed of 1 mm/min) until failure. DC and UTS data were submitted to 2-way ANOVA, followed by Tukey's test (α= 5%). Both products showed higher DC at 50º C than at 25º C in all curing conditions. No significant difference in UTS was noted between most light-activated groups at 25º C and those at 50º C. VII SC groups showed higher UTS at 50º C than at 25º C (p < 0.05). Increased temperature led to higher DC, but its effects on resin cement UTS depended on the curing condition.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength

2011

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“…It has been shown that high temperature can catalyze the acid-base reaction between acid groups and calcium or aluminum from fillers to increase pH. 19 As a consequence, the pH would rise more quickly at a high temperature than at room temperature. Therefore, polymerization would proceed without the well-known detrimental effect from low pH 21,26 but could, for this reason, compromise bonding between such products and dentin.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, polymerization would proceed without the well-known detrimental effect from low pH 21,26 but could, for this reason, compromise bonding between such products and dentin. However, it should be pointed out that studies evaluating the effects of temperature on SARCs have focused on a temperature of 608C, 19 which is considerably higher than that of the tooth. Thus, it is expected that tooth temperatures may increase the initial pH of these products more quickly than when these products set at room temperature.…”

Section: Discussionmentioning

confidence: 99%

“…18 Only a few studies have evaluated the effects of tooth temperature on SARCs, and all of them focused on bond-strength values, electron microscopy analysis, and shrinkage stress. [18][19][20] Although the authors attributed high strength values to elevated degree of conversion, [18][19][20] there is no study available in the literature directly evaluating the degree of conversion of SARCs with increased temperature.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Simulated Tooth Temperature on the Degree of Conversion of Self-adhesive Resin Cements Exposed to Different Curing Conditions

Arrais

Chagas

Munhoz

et al. 2014

Operative Dentistry

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Self-adhesive resin cements present a higher degree of conversion and faster polymerization kinetics when exposed to tooth temperature rather than to room temperature. Clinicians may expect differences in product setting time and some physical properties compared with what manufacturers report. SUMMARYObjectives: This study evaluated the degree of conversion (DC) of two commercial, self-adhesive resin cements (SARCs) using Fourier transform infrared analysis (FTIR) polymerized at simulated prepared tooth surface temperatures and under different curing conditions. Materials and Methods: RelyX U100 (U100, 3M ESPE) and Maxcem Elite (MX, Kerr Corporation) were mixed at 258C and applied to the surface of a horizontal attenuated total reflectance (ATR) unit, which was near room temperature (RT, control) (258C) or heated to simulate prepared tooth surface temperatures (288C and 328C) and then attached to an infrared spectrometer. The products were polymerized using one of three conditions: direct light exposure through a glass slide (DLE), exposure through a 1.5-mm thick ceramic disc overlay , 2014, 39-2, 204-212 (CO) (A2 shade, IPS e.max, Ivoclar Vivadent), or self-curing (SC). FTIR spectra were recorded for 12 minutes (1 spectrum/s, 16 scans/ spectrum, resolution 4 cm À1 ) immediately after application to the ATR. The DC was calculated using standard techniques of observing changes in aliphatic-to-aromatic peak ratios before and 12 minutes after curing, as well as during each 1-second interval. DC data (n=7) were analyzed by two-way analysis of variance and Tukey's post-hoc test (p=0.05).Results: Both simulated tooth temperatures significantly increased DC in all groups of MX and in the CO and SC groups of U100 compared with the RT control. For MX, the self-cure groups exposed to tooth temperatures showed DC values similar to those of the CO groups. For U100, the CO groups showed higher DC values than SC groups regardless of temperature. Time-based conversion profiles ranged according to product, temperature, and curing mode.Conclusions: Causing SARCs to polymerize at simulated tooth temperatures increases DC of SARCs compared with room-temperature curing values, mainly in the SC mode.

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Deproteinized dentin: A favorable substrate to self‐bonding resin cements?

et al. 2011

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The adhesive performance on deproteinized dentin of different self-adhesive resin cements was evaluated through microtensile bond strength (μTBS) analysis and scanning electron microscopy (SEM). Occlusal dentin of human molars were distributed into different groups, according to the categories: adhesive cementation with two-step bonding systems-control Groups (Adper Single Bond 2 + RelyX ARC/3M ESPE; One Step Plus + Duolink/Bisco; Excite + Variolink I/Ivoclar Vivadent) and self-adhesive cementation-experimental groups (Rely X Unicem/3M ESPE; Biscem/Bisco; MultiLink Sprint/Ivoclar Vivadent). Each group was subdivided according to the dentin approach to: α, maintenance of collagen fibers and β, deproteinization. The mean values were obtained, and submitted to ANOVA and Tukey test. Statistical differences were obtained to the RelyX Unicem groups (α = 13.59 MPa; β = 30.19 MPa). All the BIS Group specimens failed before the mechanical tests. Dentinal deproteinization provided an improved bond performance for the self-adhesive cement Rely X Unicem, and had no negative effect on the other cementing systems studied.

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Bonding potential of self-adhesive luting agents used at different temperatures to lute composite onlays

Cited by 38 publications

References 26 publications

Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength

Pre-heated dual-cured resin cements: analysis of the degree of conversion and ultimate tensile strength

Effect of Simulated Tooth Temperature on the Degree of Conversion of Self-adhesive Resin Cements Exposed to Different Curing Conditions

Deproteinized dentin: A favorable substrate to self‐bonding resin cements?

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