Bonding orthodontics brackets to enamel using experimental composites with an iodonium salt

Costa, Ana Rosa; Vedovello-Filho, Mario; Correr, Américo Bortolazzo; Vedovello, Sílvia Amélia Scudeler; Puppin-Rontani, Regina Maria; Ogliari, Fabrício Aulo; Moraes, Rafael R.; Correr-Sobrinho, Lourenço

doi:10.1093/ejo/cjt051

Cited by 6 publications

(11 citation statements)

References 19 publications

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“…Generally, an increased SBS was observed when DPIHFP-modified agents were incorporated in experimental composites for all light-activation times. This finding is in agreement with a previous study with experimental composites, which also found significantly higher SBS in relation to the control group, but using diphenyliodonium chloride (DPC) as iodonium salt (9). The higher bond strength of experimental composites using DPIHFP-modified agents may be explained by the fact that the salt, even in low concentration, can promote higher polymerization reactivity.…”

Section: Discussionsupporting

confidence: 92%

“…This study is a follow up of the investigations on the use of iodonium salts to improve the polymerization of resin-based dental cements (9,19). The three experimental materials tested were obtained using diphenyliodonium hexafluorphosphate (DPIHFP; Sigma-Aldrich, Milwaukee, WI, USA) at molar concentrations of 0 (control), 0.5, or 1%.…”

Section: Experimental Compositesmentioning

confidence: 99%

“…According to the manufacturers' instructions, light exposure times between 20 and 40 s are required to bond brackets to the teeth to obtain high bond strength (8). However, long exposure times are uncomfortable for the patient and present drawbacks for the clinician (9).…”

Section: Introductionmentioning

confidence: 99%

“…Some methods to reduce the light-curing time for bonding orthodontic brackets are proposed in the literature (2,(9)(10)(11)(12). The main method proposed is using light-curing units with high irradiance (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…However, this is not what occurs in the clinical practice, where the insertion of the orthodontic archwire occurs minutes after the brackets are bonded. Several studies have shown that 24 h after the bonding procedure, the brackets bond strength increased in relation to the times of 5, 10, and 30 min (9,17,18). There is no consensus as regards the waiting time required before placing the brackets.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Composite Containing an Iodonium Salt on the Bond Strength of Brackets to Bovine Enamel

et al. 2014

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This study investigated the effect of the incorporation of an iodonium salt in experimental composites, on the bond strength of metallic brackets bonded to bovine teeth. Two hundred and seventy bovine teeth were embedded in self-curing acrylic resin and divided into 18 groups (n=15), according to the experimental composite with an iodonium salt at molar concentrations 0 (control), 0.5, or 1%; the light-activation times (8, 20 and 40 s); and the storage times (10 min or 24 h). Metallic brackets were fixed on the tooth surface using experimental composites. Photoactivation was performed with a quartz-tungsten-halogen light-curing unit curing unit for 8, 20 and 40 s. The specimens were stored in distilled water at 37 °C for 10 min or 24 h and submitted to bond strength test at 0.5 mm/min. The data were subjected to three-way ANOVA and Tukey's test (α=0.05). The Adhesive Remnant Index (ARI) was used to classify the failure modes. The shear bond strengths (MPa) at 10 min for light-activation times of 8, 20 and 40 s were: G1 - 4.6, 6.9 and 7.1; G2 - 8.1, 9.2 and 9.9; G3 - 9.1, 10.4 and 10.7; and at 24 h were: G1 - 10.9, 11.1 and 11.7; G2 - 11.8, 12.7 and 14.2; G3 - 12.1, 14.4 and 15.8. There was a predominance of ARI score 3 for groups with 10 min storage time, and ARI score 2 for groups with 24 h storage time. In conclusion, the addition of iodonium salt (C05 and C1) to the experimental composite may increase the bond strength of brackets to bovine enamel using reduced light exposure times.

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Section: Discussionsupporting

confidence: 92%

Section: Experimental Compositesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Composite Containing an Iodonium Salt on the Bond Strength of Brackets to Bovine Enamel

et al. 2014

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Debonding and adhesive remnant cleanup: anin vitrocomparison of bond quality, adhesive remnant cleanup, and orthodontic acceptance of a flash-free product

Grünheid

Sudit²,

Larson

2014

EORTHO

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A Modified Photoactivation Protocol Using Two Simultaneous Light-Curing Units for Bonding Brackets to Enamel

et al. 2015

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photoactivation for 10 s on each proximal face of the bracket at a time; Simultaneous: photoactivation for 10 s on both proximal faces of the bracket at the same time; One side-20s: photoactivation for 20 s at one proximal face of the bracket only; and One side-10s: photoactivation for 10 s only at one proximal face of the bracket. SBS was tested immediately or after 1000 thermal cycles. Adhesive remnant index (ARI) was classified. Data were subjected to two-way ANOVA and Student-Newman-Keuls' test (α = 0.05). Pooled means ± standard deviations for SBS to enamel (MPa) were: 10.2 ± 4.2 (CONTROL), 9.7 ± 4.5 (Simultaneous), 5.6 ± 3.1 (One side-20s), and 4.6 ± 1.9 (One side-10s). Pooled SBS data for immediate and thermal cycled groups were 6.3 ± 2.6 and 8.8 ± 5.2. A predominance of ARI scores 1-2 and 0-1 was observed for the immediate and thermally cycled groups, respectively. In conclusion, simultaneous photoactivation of the orthodontic cement using two light-curing units, one positioned at each proximal face of the bracket, yielded similar bonding ability compared to the conventional light-curing method. Photoactivation of the orthodontic cement at one proximal face of the bracket only is not recommended, irrespective of the light-curing time used.

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Bonding orthodontics brackets to enamel using experimental composites with an iodonium salt

Abstract: The use of a ternary photoactivation system containing an iodonium salt in bonding composites may allow bonding brackets to enamel using reduced light exposure times.

Cited by 6 publications

References 19 publications

Effect of Composite Containing an Iodonium Salt on the Bond Strength of Brackets to Bovine Enamel

Effect of Composite Containing an Iodonium Salt on the Bond Strength of Brackets to Bovine Enamel

Debonding and adhesive remnant cleanup: anin vitrocomparison of bond quality, adhesive remnant cleanup, and orthodontic acceptance of a flash-free product

A Modified Photoactivation Protocol Using Two Simultaneous Light-Curing Units for Bonding Brackets to Enamel

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