UNIGE document Scientific Article
previous document  unige:85011  next document
add to browser collection
Title

Polymerization shrinkage of flowable resin-based restorative materials

Authors
Stavridakis, Minos M
Published in Operative Dentistry. 2005, vol. 30, no. 1, p. 118-28
Abstract This study measured the linear polymerization displacement and polymerization forces induced by polymerization shrinkage of a series of flowable resin-based restorative materials. The materials tested were 22 flowable resin-based restorative materials (Admira Flow, Aelite Flow, Aeliteflow LV, Aria, Crystal Essence, Definite Flow, Dyract Flow, Filtek Flow, FloRestore, Flow-it, Flow-Line, Freedom, Glacier, OmegaFlo, PermaFlo, Photo SC, Revolution 2, Star Flow, Synergy Flow, Tetric Flow, Ultraseal XT and Wave). Measurements for linear polymerization displacement and polymerization forces were performed using custom made measuring devices. Polymerization of the test materials was carried out for 60 seconds by means of a light curing unit, and each property was measured for 180 seconds from the start of curing in eight specimens for each material. Statistical evaluation of the data was performed with one-way analysis of variance (ANOVA), Tukey's Studentized Range (HSD) test (p=0.05) and simple linear regression. A wide range of values was recorded for linear polymerization displacement (26.61 to 80.74 microns) and polymerization forces (3.23 to 7.48 kilograms). Statistically significant differences among materials were found for both properties studied. Very few materials (Freedom, Glacier, and Photo SC) presented low values of linear polymerization displacement and polymerization forces (similar to hybrid resin composites), while the majority of materials presented very high values in both properties studied. Study of the shrinkage kinetics revealed the exponential growth process of both properties. The polymerization forces development exhibited a few seconds delay over linear polymerization displacement. Simple linear regression showed that the two polymerization shrinkage properties that were studied were not highly correlated (r2=0.59).
Keywords Analysis of VarianceComposite Resins/radiation effectsDental Marginal AdaptationDental RestorationPermanent/methodsDental Stress AnalysisElasticityHardnessLightLinear ModelsMaterials TestingPhase TransitionRheologyViscosity
Identifiers
PMID: 15765967
Full text
Article (Published version) (927 Kb) - public document Free access
Structures
Research group Groupe Krejci Ivo (médecine dentaire) (240)
Citation
(ISO format)
STAVRIDAKIS, Minos M, DIETSCHI, Didier, KREJCI, Ivo. Polymerization shrinkage of flowable resin-based restorative materials. In: Operative Dentistry, 2005, vol. 30, n° 1, p. 118-28. https://archive-ouverte.unige.ch/unige:85011

112 hits

31 downloads

Update

Deposited on : 2016-07-04

Export document
Format :
Citation style :