Volumetric shrinkage of composites using video-imaging.

J Dent 2003 Feb;31(2):97-103

Research and Development, Bisco Inc., Schaumburg, IL 60193, USA.

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.

Download full-text PDF

Source
http://dx.doi.org/10.1016/s0300-5712(03)00005-8DOI Listing
February 2003
3 Reads

Publication Analysis

Top Keywords

volumetric shrinkage
24
single- multi-view
8
shrinkage measured
8
shrinkage composites
8
shrinkage values
8
volumetric
7
shrinkage
7
video-imaging
5
composites
5
measured single-view
4
mode red
4
red filter
4
anova paired
4
single-view mode
4
500 mw/cm2
4
comparison bonferroni
4
curing light
4
viptm curing
4
light 40s
4
40s 500
4

Similar Publications