Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Tiba, Amer; Charlton, David; Vandewalle, Kraig S; Ragain, James C.

doi:10.1016/j.jdent.2005.02.004

Cited by 32 publications

(31 citation statements)

References 36 publications

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“…To date, no investigations have been undertaken for a thorough, comprehensive comparison on fluidity and polymerization shrinkage between conventional composites and the recently available flowable composites. Further, with regard to measuring the polymerization shrinkage of the highly fluid paste of flowable composite resins, there is an obvious impending need for a new measurement method beyond the traditional ones [8][9][10] . In this study, a highly accurate laser displacement meter was utilized to measure the polymerization shrinkage of highly fluid flowable composites.…”

Section: Introductionmentioning

confidence: 99%

Dimensional change measurements of conventional and flowable composite resins using a laser displacement sensor

Miyasaka¹,

Okamura²

2009

Dent. Mater. J.

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The polymerization shrinkage values of commercial flowable and conventional composites were measured with a newly developed laser displacement sensor. Compressive strength and filler content were also measured. Compared to conventional composites, the flowable composites required a longer time -not exceeding 4 minutes -to reach a constant polymerization shrinkage rate. In terms of shrinkage ratio, it was less than 1.5% for conventional composites at 90 minutes, which was lower than that of flowable composites, i.e. more than 2.0%. The compressive strength of conventional composites was higher than that of flowable composites. A highly significant correlation between filler content and polymerization shrinkage at 90 minutes was observed, and polymerization shrinkage tended to decrease as filler content increased. In light of the results obtained in this study, the newly developed displacement meter with a laser displacement sensor proved to be effective for in-depth investigation of the polymerization shrinkage of dental composites.

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Section: Introductionmentioning

confidence: 99%

Dimensional change measurements of conventional and flowable composite resins using a laser displacement sensor

Miyasaka¹,

Okamura²

2009

Dent. Mater. J.

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“…This technique has been shown to yield results comparable to those observed using mercury dilatometry 15 and drop-shape analysis. 16 Polymerization shrinkage has been an inherent deficiency with resin composites over the years, despite improvements in mechanical properties, and it can contribute to gap formation at the margins of restorations. The current goal of the manufacturers of resin composite restorative materials remains improvement or elimination of contraction stress-possibly through low or non-shrinking monomers.…”

mentioning

confidence: 99%

“…8 Filler loading can be deceiving, however, because it may not be indicative of the presence of pre-polymerized filler particles. 16 With the use of pre-polymerized filler particles, resin composites typically benefit by having lower polymerization shrinkage, as found with Durafill VS and Premise. However, in the current study, it was interesting to note that Gradia Direct Posterior did not benefit from their incorporation.…”

mentioning

confidence: 99%

Properties of Hybrid Resin Composite Systems Containing Prepolymerized Filler Particles

Blackham¹,

Vandewalle²,

Lien³

2009

Operative Dentistry

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The incorporation of prepolymerized-filler particles in hybrid resin composite systems may result in a reduction of mechanical properties. SUMMARYThis study compared the properties of newer hybrid resin composites with prepolymerizedfiller particles to traditional hybrids and a microfill composite. The following properties were examined per composite: diametral tensile strength, flexural strength/modulus, Knoop microhardness and polymerization shrinkage. Physical properties were determined for each composite group (n=8), showing significant differences between groups per property (p<0.001). In general, the traditional hybrid composites (Z250, Esthet-X) had higher strength, composites containing pre-polymerized fillers (Gradia Direct Posterior, Premise) performed more moderately and the microfill composite (Durafill VS) had lower strength. Premise and Durafill VS had the lowest polymerization shrinkage.

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“…Various methods have been reported for evaluating polymerization shrinkage of resin composites, such as mercury dilatometer 16,21) , bonded disk method 22,23) , optical method 24,25) , use of the strain gauge 26) , liner shrinkage [27][28][29] etc. Monteiro et al compared the polymerization shrinkage of resin composites using three different methods; coordinate measuring machine (CMM), optical coherence tomography (OCT) and Archimedes' principle 30) .…”

Section: Discussionmentioning

confidence: 99%

“…Aqueous solution of sodium lauryl sulfate, a surfaceactive agent, was used as the buoyancy medium in this study. The adherence of air bubbles to the samples, which can cause incorrect measurements, was avoided by using sodium lauryl sulfate 25,30,31) . It revealed that the polymerization shrinkage of BBS was effectively reduced.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of low polymerization shrinkage flowable resin composites in newly-developed cavity base materials for bulk filling technique

Nitta

Nomoto

Tsubota

et al. 2017

Dental Materials Journal

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The purpose of this study was to evaluate polymerization shrinkage and other physical properties of newly-developed cavity base materials for bulk filling technique, with the brand name BULK BASE (BBS). Polymerization shrinkage was measured according to ISO/FDIS 17304. BBS showed the significantly lowest polymerization shrinkage and significantly higher depth of cure than conventional flowable resin composites (p<0.05). The Knoop hardness, flexural strength and elastic modulus of that were significantly lower than conventional flowable resin composites (p<0.05). BBS had the significantly greatest filler content (p<0.05). SEM images of the surface showed failure of fillers. The lowest polymerization shrinkage was due to the incorporation of a new type of low shrinkage monomer, which has urethane moieties. There were no clear correlations between inorganic filler contents and polymerization shrinkage, flexural strength and elastic modulus. In conclusion, the low polymerization shrinkage of BBS will be useful for cavity treatment in dental clinics.

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Comparison of two video-imaging instruments for measuring volumetric shrinkage of dental resin composites

Cited by 32 publications

References 36 publications

Dimensional change measurements of conventional and flowable composite resins using a laser displacement sensor

Dimensional change measurements of conventional and flowable composite resins using a laser displacement sensor

Properties of Hybrid Resin Composite Systems Containing Prepolymerized Filler Particles

Characteristics of low polymerization shrinkage flowable resin composites in newly-developed cavity base materials for bulk filling technique

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