Effects of surface conditioning on repair bond strengths of non-aged and aged microhybrid, nanohybrid, and nanofilled composite resins

Margareta Rinastiti*, Widowati Siswomihardjo, Henk J. Busscher, Mutlu Ozcan

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

87 Citations (Scopus)

Abstract

This study evaluates effects of aging on repair bond strengths of microhybrid, nanohybrid, and nanofilled composite resins and characterizes the interacting surfaces after aging. Disk-shaped composite specimens were assigned to one of three aging conditions: (1) thermocycling (5,000x, 5-55 degrees C), (2) storage in water at 37 degrees C for 6 months, or (3) immersion in citric acid at 37 degrees C, pH 3 for 1 week; a non-aged group acted as the control. Two surface conditionings were selected: intermediate adhesive resin application (IAR-application) and chairside silica coating followed by silanization and its specific IAR-application (SC-application). Composite resins, of the same kind as their substrate, were adhered onto the substrates, and repair shear bond strengths were determined, followed by failure type evaluation. Filler particle exposure was determined by X-ray photoelectron spectroscopy and surface roughness analyzed using scanning electron and atomic force microscopy. Surface roughness increased in all composite resins after aging, but filler particle exposure at the surface only increased after thermocycling and citric acid immersion. Composite resin type, surface conditioning, and aging method significantly influenced the repair bond strengths (p

Original languageEnglish
Pages (from-to)625-633
Number of pages9
JournalClinical Oral Investigations
Volume15
Issue number5
DOIs
Publication statusPublished - Oct-2011

Keywords

  • Aged composite resin repair
  • Intermediate adhesive resin
  • Microhybrid composite resin
  • Nanofilled composite resin
  • Nanohybrid composite resin
  • Silica coating
  • RESTORATIVE MATERIALS
  • CEMENT
  • WATER
  • MICROLEAKAGE
  • TENSILE
  • STORAGE
  • TEETH
  • WEAR

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