Restor Dent Endod.  2014 Aug;39(3):172-179.

Effect of 38% carbamide peroxide on the microleakage of silorane-based versus methacrylate-based composite restorations

Affiliations
  • 1Department of Operative Dentistry, Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran. smhk58950@gmail.com
  • 2Dental Research Center, Tehran University of Medical Sciences, Tehran, Iran.
  • 3Dental School, Tehran University of Medical Sciences, International Campus, Tehran, Iran.
  • 4Department of Pediatric Dentistry, Tehran University of Medical Sciences, International Campus, Tehran, Iran.

Abstract


OBJECTIVES
This study aimed to assess the effect of 38% carbamide peroxide on the microleakage of class V cavities restored with either a silorane-based composite or two methacrylate-based composites.
MATERIALS AND METHODS
A total of 96 class V cavities were prepared on the buccal surface of extracted human teeth with both enamel and dentin margins and were randomly assigned into three groups of Filtek P90 (3M-ESPE) + P90 system adhesive (3M-ESPE)(group A), Filtek Z250 (3M-ESPE) + Adper Prompt L-Pop (3M-ESPE)(group B) and Filtek Z350XT (3M-ESPE) + Adper Prompt L-Pop (group C). Half of the teeth were randomly underwent bleaching (38% carbamide peroxide, Day White, Discus Dental, applying for 15 min, twice a day for 14 day) while the remaining half (control) were not bleached. Dye penetration was measured following immersion in basic fuchsine. Data were statistically analyzed using Kruskal-Wallis and Mann-Whitney U tests at a level of 0.05.
RESULTS
No significant differences were found between composites in the control groups in enamel (p = 0.171) or dentin (p = 0.094) margins. After bleaching, microleakage of Z250 (in enamel [p = 0.867] or dentin [p = 0.590] margins) and Z350 (in enamel [p = 0.445] or dentin [p = 0.591] margins) did not change significantly, but the microleakage of P90 significantly increased in both enamel (p = 0.042) and dentin (p = 0.002) margins.
CONCLUSIONS
No significant differences were noted between the bleached and control subgroups of two methacrylate-based composites in enamel or dentin margins. Microleakage of silorane-based composite significantly increased after bleaching.

Keyword

Microleakage; Silorane composite resins; Tooth bleaching

MeSH Terms

Adhesives
Dental Enamel
Dentin
Humans
Immersion
Rosaniline Dyes
Tooth
Tooth Bleaching
Urea*
Adhesives
Rosaniline Dyes
Urea

Figure

  • Figure 1 Representative microscopic images showing the scores of microleakage, taken under a stereomicroscope (at a ×40 magnification). (a) score 0; (b) score 1; (c) score 2; (d) score 3.


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