Journal of dentistry · 2003
Volumetric shrinkage of composites using video-imaging.
Сравнительное исследованиеСтатьяНазвание и аннотация: Перевод в очереди
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Sharp Louis J, Choi Inchon B, Lee Thomas E, Sy Abegail, Suh Byoung I
Аннотация
OBJECTIVE: This study involves investigation of the use of video-imaging for measurement of volumetric shrinkage of composites.
METHODS: Six composites were tested for volumetric shrinkage using video-imaging. The volumetric shrinkage was measured using the single- and multi-view volumetric reconstruction modes. All composites were cured using a VIP(TM) curing light for 40s at 500 mW/cm(2). Dynamic shrinkage was measured using the single-view mode with a red filter placed over the detector opening.
RESULTS: Analysis of the volumetric shrinkage values by a one way ANOVA for each composite showed no difference for the single- and multi-view measurement mode. The shrinkage values determined by video-imaging were compared to those measured for the same composites by mercury dilatometry by one way ANOVA followed by a paired comparison using the Bonferroni method.
CONCLUSION: The video-imaging technique gives reproducible results for volumetric shrinkage of composites comparable to those measured by dilatometry.
METHODS: Six composites were tested for volumetric shrinkage using video-imaging. The volumetric shrinkage was measured using the single- and multi-view volumetric reconstruction modes. All composites were cured using a VIP(TM) curing light for 40s at 500 mW/cm(2). Dynamic shrinkage was measured using the single-view mode with a red filter placed over the detector opening.
RESULTS: Analysis of the volumetric shrinkage values by a one way ANOVA for each composite showed no difference for the single- and multi-view measurement mode. The shrinkage values determined by video-imaging were compared to those measured for the same composites by mercury dilatometry by one way ANOVA followed by a paired comparison using the Bonferroni method.
CONCLUSION: The video-imaging technique gives reproducible results for volumetric shrinkage of composites comparable to those measured by dilatometry.
Предметные рубрики MeSH
Acrylic ResinsBarium CompoundsBisphenol A-Glycidyl MethacrylateCalibrationComposite ResinsCuring Lights, DentalDental MaterialsHumansImage Processing, Computer-AssistedLightMaterials TestingMethacrylatesMethylmethacrylatesPolyurethanesResin CementsSilicon DioxideSurface PropertiesTime FactorsVideo RecordingZirconium