Effects of thermocycling and light source on the bond strength of metallic brackets to bovine teeth

Costa, Ana Rosa; Correr, Américo Bortolazzo; Puppin-Rontani, Regina Maria; Vedovello, Sílvia Amélia Scudeler; Valdrighi, Heloísa Cristina; Correr-Sobrinho, Lourenço; Filho, Mário Vedovello

doi:10.1590/s0103-64402011000600008

Cited by 19 publications

(22 citation statements)

References 21 publications

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“…However, several studies showed no significant differences among different light sources (6,7,17,18). Other studies showed that the absence of differences probably might be explained by the fact that a very thin resin layer is necessary for bracket bonding and, thus, the differences in energy dose were probably not enough to influence the bond strengths (7,19).…”

Section: Discussionmentioning

confidence: 99%

Influence of Light Source, Thermocycling and Silane on the Shear Bond Strength of Metallic Brackets to Ceramic

Neto¹,

Costa

Correr

et al. 2015

Braz. Dent. J.

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The objective of this study was to evaluate the effects of different light sources, thermocycling and silane on the bond strength of metallic brackets to ceramic. Cylinders of feldspathic ceramic were etched with 10% hydrofluoric acid for 60 s. Half of the cylinders (Groups 1 to 4) received two layers of silane. Metallic brackets were bonded to the cylinders using Transbond XT and divided into 8 groups (n=20), according to light source (Radii Plus LED - 40 s; Groups 1, 2, 5 and 6 and XL 2500 halogen light - 40 s; Groups 3, 4, 7 and 8) and experimental conditions with (Groups 2, 4, 6 and 8) without thermocycling (Groups 1, 3, 5 and 7). Shear bond testing was carried out after 24 h of deionized water storage (Groups 1, 3, 5 and 7) and thermocycling (Groups 2, 4, 6 and 8; 7,000 cycles - 5°/55 °C). Date were submitted to three-way ANOVA and Tukey's post hoc test (α=0.05). The Adhesive Remnamt Index (ARI) was evaluated at 8× magnification. The application of silane was effective in increasing the shear bond strength of the brackets to ceramic (p<0.05). Significant difference (p<0.05) on the bond strength was observed between light sources with or without thermocycling. The ARI showed a predominance of scores 0 for all groups, with an increase in scores 1, 2 and 3 for the silane groups. In conclusion, silane improved significantly the shear bond strength of the brackets to ceramic. The thermocycling and light sources influence on the bond strength.

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Section: Discussionmentioning

confidence: 99%

Influence of Light Source, Thermocycling and Silane on the Shear Bond Strength of Metallic Brackets to Ceramic

Neto¹,

Costa

Correr

et al. 2015

Braz. Dent. J.

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“…The composite resins are densely loaded with reinforcing filler particles for strength and wear resistance 7 . The advantage of light-activated composite resins is that the clinician has time to place the brackets in the position, may remove excess material before the light activation 8 , and support adequately the loads applied during orthodontic treatment resulting from chewing 9 . However, failures with composite resins can occur and has been attribute to humidity contamination 10 or incomplete polymerization when considering the light exposure time or limited depth polymerization 11 , which changes with the light penetration into the material 12 .…”

Section: Introductionmentioning

confidence: 99%

Influence of adhesive and bonding material on the bond strength of bracket to bovine tooth

Oliveira¹,

Costa²,

Correr³

et al. 2017

Braz. J. Oral Sci.

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Aim: To evaluate, in vitro, the effect of adhesive and bonding materials on the shear bond strength (SBS) of metallic brackets bonded to bovine teeth. Methods: Bovine teeth were embedded with acrylic resin, etched with 35% phosphoric acid for 20 s, rinsed, dried for 20 s and divided into 8 groups (n=20), according to the bonding materials and adhesive: Groups 1 and 5 -Transbond XT; Groups 2 and 6 -Fill Magic; Groups 3 and 7 -Biofix; and, Groups 4 and 8 -Orthocem. One layer of adhesive 3 M Unitek (Group 1), and one layer of Single Bond Universal Adhesive (Groups 2, 3 and 4) were applied and light-cured with LED for 10 s. Brackets were bonded to the buccal surface with four bonding materials and light-cured with LED for 40 s. SBS was carried out after 24 h and thermocycling (7,000 cycles -5°/55 °C). Data were submitted to two way ANOVA and Tukey's post hoc test (α=0.05). The Adhesive Remaining Index (ARI) was evaluated at 8×. Results: The adhesive was effective in increasing the SBS for all bonding materials (p<0.05). Significant difference (p<0.05) on the SBS was observed between bonding materials with or without adhesive. The ARI showed a predominance of scores 0 for all groups. Conclusions: The adhesive improved significantly the SBS of the brackets to teeth. Different SBS values occurred among the bonding materials. ARI index showed predominance of score 0 for all groups.

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“…The light-cured composite resins are routinely used for bonding orthodontic brackets to the teeth (1,2). The advantage of light-cured composite is that the clinician has enough time to place the brackets in the correct position and easily remove any excess material before the lightactivation and insertion of the orthodontic archwire (3).…”

Section: Introductionmentioning

confidence: 99%

Effect of Activation Mode on Shear Bond Strength of Metallic Brackets

Correr

Costa

Lucato³

et al. 2013

Braz. Dent. J.

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The aim of this study was to evaluate the shear bond strength (SBS) of metallic orthodontic brackets bonded to bovine teeth using light-activated or chemically activated composite resins. One hundred and twenty bovine mandibular incisors were divided into 6 groups (n=20), according to the bonding materials: Transbond XT (T); Enforce Dual (ED); Enforce chemical (EC); Enforce Light-activated (EL); Concise Orthodontic (C); and RelyX Unicem Capsule (UN). Metallic brackets were positioned and firmly bonded to the teeth. Lightactivation for T, ED, EL and UN was carried out with four exposures on each side of the bracket with 20 s total exposure times using XL2500 (3M ESPE). EC and C were chemically cured. Next, all specimens were stored in deionized water at 37 °C for 24 h. The shear bond strength was carried out at a crosshead speed of 1.0 mm/min. Data were subjected to one-way ANOVA and Tukey's test (α=0.05). The adhesive remnant index (ARI) was evaluated at 8× magnification. C (17.72±4.45) presented significantly higher SBS means (in MPa) than the other groups (p<0.05), followed by EC (11.97±5.77) and ED (10.57±1.32). EL (5.39±1.06) and UN (4.32±1.98) showed the lowest SBS means, while T (9.09±2.56) showed intermediate values. For ARI, there was a predominance of score 0 for EC, C and UN, and score 3 for T, ED and EL. In conclusion, the activation mode influenced the SBS.

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Effects of thermocycling and light source on the bond strength of metallic brackets to bovine teeth

Cited by 19 publications

References 21 publications

Influence of Light Source, Thermocycling and Silane on the Shear Bond Strength of Metallic Brackets to Ceramic

Influence of Light Source, Thermocycling and Silane on the Shear Bond Strength of Metallic Brackets to Ceramic

Influence of adhesive and bonding material on the bond strength of bracket to bovine tooth

Effect of Activation Mode on Shear Bond Strength of Metallic Brackets

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