Resistência ao cisalhamento da colagem dos compósitos Concise e Transbond XT com e sem agente de união

Abstract

Objectives: The aim of this study was to evaluate the shear bond strength of brackets and the adhesive remnant index (ARI) of Concise and Transbond XT composites with and without the use of a bonding agent. Methods: The sample consisted of 60 bovine incisors divided into four groups (n=15). All teeth were subjected to prophylaxis with pumice and enamel etching with phosphoric acid at 37%. In Groups 1 and 2 brackets were bonded with Concise composite with and without application of enamel bond resin, respectively. In Groups 3 and 4, Transbond XT was used with and without XT Primer application, respectively. In these latter groups bonding was light cured for 40 seconds. Specimen shear strength testing was performed on an Instron machine at 0.5 mm/min, and ARI was subsequently evaluated. Results: Shear bond strength in Group 4 was statistically higher than in Groups 1 and 2 (p<0.05) but not when compared to Group 3 (p>0.05). There were no statistically significant differences between Groups 1, 2 and 3 (p>0.05). ARI in Group 3 was statistically higher than in Group 2 (p<0.05), but not statistically different from Groups 1 and 4 (p>0.05). There were no statistically significant differences between Groups 1, 2 and 4 (p>0.05). Conclusion: The composites Concise and Transbond XT showed adequate bond strength with or without the use of their respective bonding agents. AbstractKeywords: Shear strength. Dental bonding. Orthodontics.

Comparative evaluation of shear bond strength and debonding properties of GC Ortho Connect composite and Transbond XT composite

“…In a comparison of other no-primer orthodontic adhesives, Heliosit composite and Ortho Cem composite were evaluated by Scribante et al 18 The omission of a bonding agent may simplify the clinical procedure, decrease chair time, minimise the risk of moisture contamination, and lower the costs of the bonding process. 9 A comparison of Transbond XT with and without its primer revealed no significant difference in SBS, which indicates that the absence of a priming agent may not compromise the SBS. These findings are consistent with those of Neves et al, 9 Nandhra et al, 13 Shahabi et al, 14 and Rai et al 21 but disagree with the results of Pulido et al, 22 who believed that the application of a primer increases bracket bond strength.…”

“…9 A comparison of Transbond XT with and without its primer revealed no significant difference in SBS, which indicates that the absence of a priming agent may not compromise the SBS. These findings are consistent with those of Neves et al, 9 Nandhra et al, 13 Shahabi et al, 14 and Rai et al 21 but disagree with the results of Pulido et al, 22 who believed that the application of a primer increases bracket bond strength.…”

“…In addition, simplifying clinical procedures to achieve better results in a shorter period of time has been the focus of many material manufacturers. [6][7][8][9][10][16][17][18] In the present study, a novel no-primer orthodontic adhesive was compared using Transbond XT composite as the control group.…”

“…[3][4][5] Despite the established long-term success of traditional methods, their time-consuming nature is their main drawback, which may negatively affect bond strength, especially in the posterior regions of the dental arch due to limited vision, poor accessibility, and difficult moisture control. 5,6 Attempts have been made to simplify the bonding process, and BAHRAMI, AZARBAYEJANI AND KAZEMIAN self-etch primers, 7 self-adhesive cements, 6,8 laser irradiation, 1 and the elimination of the priming step 9 have been recommended. To enhance wetting and the penetration of resin into the enamel surface, the application of a primer is an essential part of the resin bonding procedure.…”

“…12 A review of several studies has revealed that there is no consensus regarding bracket bond strength following the elimination of primer from conventional adhesives. 9,13,14 A novel concept to accelerate the bonding process is to use no-primer orthodontic adhesives, such as GC Ortho Connect whose composition eliminates the need for a primer. 15 Limited data are available regarding the shear bond strength (SBS) and failure mode of different types of no-primer adhesives, especially GC Ortho Connect composite resin 16,17 and whether the priming step can be eliminated when other conventional adhesive systems are used.…”