2013
DOI: 10.7243/2053-5775-1-1
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Volumetric change of flowable composite resins due to polymerization as measured with an electronic mercury dilatometer

Abstract: Background: To determine the total volumetric change and the relative speed of shrinkage of bulk fill flowable composites during polymerization. Materials and methods: A specially designed electronic mercury dilatometer was used to determine the volumetric change. The light intensity was 500mW/cm 2 . The mercury dilatometer measured the volumetric change every 0.5 seconds during the 35 second irradiation exposure time. The materials tested were Z250 as standard and control. Four bulk fill flowable composites w… Show more

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Cited by 10 publications
(9 citation statements)
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“…Volumetric change was measured with an electronic mercury dilatometer [19][20][21]. Five samples from each material group were light cured for 35.0 seconds at 800mW/cm 2 (Dentsply/Caulk Spectrum 800 halogen).…”
Section: Volumetric Shrinkagementioning
confidence: 99%
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“…Volumetric change was measured with an electronic mercury dilatometer [19][20][21]. Five samples from each material group were light cured for 35.0 seconds at 800mW/cm 2 (Dentsply/Caulk Spectrum 800 halogen).…”
Section: Volumetric Shrinkagementioning
confidence: 99%
“…The curing output was monitored with a Caulk (Milford, Germany) radiometer to ensure an output of 800mW/cm 2 ± 50mW/cm 2 . Calibration of the electronic mercury dilatometer was done as described previously prior to every specimen test [19][20][21]. The Teflon specimen holder has a hole with a diameter of 5.0mm and a height of 2.5mm resulting in the specimen volume of 49.087mm 3 .…”
Section: Volumetric Shrinkagementioning
confidence: 99%
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“…Investigations on the volumetric change of bulk fill flowable composites (Smart Dentin Replacement (SDR), Filtek bulk fill flowable (FBF), Venus bulk fill (VBF) compared with universal composites have resulted in similar percentages of volumetric shrinkage. 3,4 Voids can be included inadvertently in the material by the manufacturer or by the clinician during restoration placement, 5,6 and have been a concern since the hand-mixed chemically cured composites. 7 At that stage, voids were assessed by visualisation of sections of 300µm.…”
Section: Introductionmentioning
confidence: 99%