EVALUATION OF THE INFLUENCE OF ENAMEL INFILTRANT ON THE SHEAR BOND STRENGTH OF ORTHODONTIC BRACKETS

• DOI: 10.22533/at.ed.2991915026

• Palavras-chave: ATENA

• Keywords: Dental caries, Orthodontic brackets, Shear bond strength.

• Abstract:

   The aim of this study was to evaluate

  the effects of a caries infiltrant on the shear bond

  strength of metallic brackets fixed to healthy

  bovine enamel. Forty permanent incisors were

  randomized into two groups: 1- was not treated

  and 2- was treated with the ICON®. Metallic

  brackets (Roth Kirium, slot .022”× 030”, Abzil,

  3M Unitek, Brazil) were glued on to the buccal

  surface of the teeth using an adhesive system

  and composite resin. Each group was divided

  into two subgroups: in subgroup a, the enamel

  was not subjected to pHcycling; in subgroup

  b,the enamel was subjected to pHcycling. The

  specimens were aged, and the pH-cycling

  process was performed. Shear strength tests

  were performed with a universal testing machine

  and the specimens were classified according to

  the adhesive remnant index (ARI). The shear

  bond strength was significantly lower in group

  G1a compared with group G1b. Groups G2a

  and G2b did not show statistically significant

  differences in shear bond strength (p> 0.05). In

  addition, the shear bond strength in group G2b

  was not significantly different compared with the

  control group (G1a). There was no statistically

  significant difference in the ARI values between

  groups. Application of the Icon®resin infiltrant on

  the enamel surface subjected to demineralization

  did not significantly affect shear bond strength

  compared with the control group. The pH-cycling

  process did not affect shear bond strength or the

  ARI in the experimental groups treated with the

  Icon® resin infiltrant. ARI analysis demonstrated

  the prevalence of adhesive failures in all

  experimental groups.

• Número de páginas: 15