Experimental Analysis of Polymerization Shrinkage of Dental Restoration Material in Cavities

Abstract:

The polymerization shrinkage of light-cured composite resin, a dental restoration material, was studied using three different experimental methods. Digital image correlation method was used to examine the shrinkage deformation on the free surface of artificial cylindrical cavities. X-ray CT images and the digital image correlation were employed to measure the shrinkage deformation in the cavities. The shrinkage force was measured at the floor of the cavity using a load-cell, and evaluated as functions of time and the depth of the cavity.

• Periodical: Advanced Materials Research (Volumes 123-125)
• Pages: 319-322
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.123-125.319
• Online since: August 2010
• Authors: Kazuo Arakawa
• Keywords: Dental Restoration Material, Light-Cured Composite Resin, Polymerization Shrinkage

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[10] [20] [30] [40] [50] [0] 100 200 300 Load P, N Time t, s Clearfil AP-X (SUS304) Free surface Cavity (φ3mm) h=2. 1mm h=0. 8mm h=2. 4mm.

[10] [20] [30] [40] [50] 600 0. 5 1. 0 1. 5 2. 0 2. 5 3. 0 3. 5 4. 0 Load P *, N Depth h, mm Clearfil AP-X (SUS304) Free surface Cavity (φ3mm) (a) Shrinkage force vs time (b) Shrinkage force vs cavity depth Fig. 7 Shrinkage force at cavity floor (with bonding agent).