The Effect of Different Light Sources on Microleakage of Bleached Enamel

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Bulucu B., Özsezer Demiryürek E., Ertaş E., Yuksel G.

DENTAL MATERIALS JOURNAL, vol.27, no.4, pp.598-604, 2008 (SCI-Expanded) identifier

  • Publication Type: Article / Article
  • Volume: 27 Issue: 4
  • Publication Date: 2008
  • Doi Number: 10.4012/dmj.27.598
  • Journal Name: DENTAL MATERIALS JOURNAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.598-604
  • Keywords: Bleaching, Microleakage, Light curing units, SHEAR BOND STRENGTH, COMPOSITE RESIN RESTORATIONS, CLASS-II CAVITIES, HYDROGEN-PEROXIDE, TEMPERATURE RISE, BOVINE ENAMEL, PLASMA-ARC, DENTIN, AGENTS, MICROHARDNESS
  • Ondokuz Mayıs University Affiliated: Yes

Abstract

This study evaluated the immediate effects of halogen, LED (light-emitting diode), and plasma are curing units on microleakage of bleached enamel. The buccal and lingual enamel surfaces of experimental groups (n=30) were bleached with 16% carbamide peroxide for a period of 10 days, with a daily contact time of 90 minutes. Box-shaped Class V cavities were also prepared on 60 extracted molar teeth (n=30, control group). For all groups, a composite resin (Grandio) was bonded with one of the two employed adhesive systems. Single Bond 2 or Prime & Bond NT. After restoration, all specimens were thermocycled for 200 cycles between 5 degrees C and 55 degrees C with a dwell time of 60 seconds in each bath, and then exposed to a dye. In the control groups, microleakage was statistically lower than the bleached groups (p<0.01). Groups cured with QTH and PAC showed no statistical differences (p>0.05). However, groups cured with LED system showed statistically significant differences (p<0.01) in microleakage.