Effect of thermocycling on the microleakage of conventional and resin-modified glass ionomers

To compare the effect of thermocycling on the microleakage of conventional and resin modified glass ionomer restorative materials. Class V preparations, centered on the CEJ, were prepared on the lingual and facial surfaces of 30 extracted human third molar teeth. Preparations were conditioned and re...

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Bibliographic Details
Published inAmerican journal of dentistry Vol. 9; no. 1; p. 19
Main Authors Doerr, C L, Hilton, T J, Hermesch, C B
Format Journal Article
LanguageEnglish
Published United States 01.02.1996
Subjects
Analysis of Variance
Dental Leakage
Dental Marginal Adaptation
Dental Research - methods
Glass Ionomer Cements - chemistry
Hot Temperature
Humans
Maleates
Materials Testing - methods
Resin Cements
Resins, Synthetic
Specimen Handling
Water - chemistry
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Summary:To compare the effect of thermocycling on the microleakage of conventional and resin modified glass ionomer restorative materials. Class V preparations, centered on the CEJ, were prepared on the lingual and facial surfaces of 30 extracted human third molar teeth. Preparations were conditioned and restored randomly on one surface with Ketac-Fil and on the other surface with Photac-Fil. Restorations were protected during curing, finishing, and storage with Ketac-Glaze. Specimens were aged in room temperature distilled water for 7 days. Half of the specimens were thermocycled for 2,500 cycles in 5 degrees-55 degrees water baths with 5-second dwell times. All specimen apices were sealed with red compound, occlusal fissures sealed with pit/fissure sealant, and surfaces painted to within 1.5 mm of restoration margins with red nail polish. Specimens were stained with 5% methylene blue, invested in orthodontic resin, and sectioned faciolingually. The percentage of dye penetration along the tooth restoration interface was measured with a digital imaging system. Statistical analysis showed that neither thermocycling or type of material had a significant effect on dye penetration (P > 0.5).
ISSN:0894-8275