Polymerization shrinkage strain of interocclusal recording materials
Abstract Objectives The aim of this in vitro study was to investigate the polymerization shrinkage behavior and to measure the polymerization shrinkage-strain of interocclusal recording materials. Methods The materials investigated in this study were five polyvinylsiloxane (Imprint™ Bite, Silagum Au...
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Published in | Dental materials Vol. 25; no. 1; pp. 115 - 120 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
England
Elsevier Ltd
01.01.2009
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Subjects | |
Online Access | Get full text |
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Summary: | Abstract Objectives The aim of this in vitro study was to investigate the polymerization shrinkage behavior and to measure the polymerization shrinkage-strain of interocclusal recording materials. Methods The materials investigated in this study were five polyvinylsiloxane (Imprint™ Bite, Silagum Automix Bite, O-Bite, Blu-Mousse® Classic and Exabite II), one polyether (Ramitec) and one dimethacrylatebased (Luxabite) materials. The polymerization shrinkage values of ten specimens for each material were measured by the Bonded-disk method at 1, 3, 5, 7 and 10 min after mixing at 37 °C. The amount of shrinkage-strain (%) was derived and all data were statistically analyzed by one-way ANOVA and the multiple comparison Scheffé test ( α = 0.05). Results The representative shrinkage-strain kinetic graphs showed that all specimens shrank immediately, except Luxabite which expanded for the initial few seconds. After that, the shrinkage-strain values increased in the magnitude up to 10 min, but its rate decreased gradually with time. The shrinkage-strain values (0.18 ± 0.03–0.16 ± 0.03%) of O-Bite at 5, 7 and 10 min were significantly lower than the other materials, but Luxabite exhibited the highest values (3.10 ± 0.17–3.30 ± 0.16%). Significance The interocclusal recording materials investigated presented significantly different polymerization shrinkage-strain kinetics and showed dimensional changes even after the setting time indicated by respective manufacturers. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 ObjectType-Article-1 ObjectType-Feature-2 |
ISSN: | 0109-5641 1879-0097 |
DOI: | 10.1016/j.dental.2008.04.016 |