J Korean Acad Conserv Dent.  2003 Jul;28(4):348-353. 10.5395/JKACD.2003.28.4.348.

Amount of polymerization shrinkage and shrinkage stress in composites and compomers for posterior restoration

• Park SH
• Lee SY
• Cho YS
• Kim SS
• Lee CJ
• Kim YJ
• Lee BH
• Lee KS
• Noh BD

• KMID: 1987259
• DOI: http://doi.org/10.5395/JKACD.2003.28.4.348

Abstract

The purpose of present study was to evaluate the polymerization shrinkage stress and amount of linear shrinkage of composites and compomers for posterior restoration. For this purpose, linear polymerization shrinkage and polymerization stress were measured. For linear polymerization shrinklage and polymerization stress measurement, custom made Linometer (R&B, Daejon, Korea) and Stress measuring machine was used (R&B, Daejon, Korea). Compositers and compomers were evaluated; Dyract AP (Dentsply Detrey, Gumbh. German) Z100 (3M Dental Products, St. Paul, USA) Surefil (Dentsply Caulk, Milford, USA) Pyramid(Bisco, Schaumburg, USA) Synergy Compact (Coltene, Altstatten, Switzerland), Heliomolar (Vivadent/Ivoclar, Liechtenstein), and Compoglass (Vivadent Ivoclar/Liechtenstein) were used. 15 measurements were made for each material. Linear polymerization shrinkage or polymerization stress for each material was compared with one way ANOVA with Tukey at 95% levels of confidence. For linear shrinkage; Heliomolar, Surefil

Keyword

Polymerization shrinkage stress; Polymerization shrinkage amount; Composite resin; Linometer; Tensiometer; Packable composite

MeSH Terms

Compomers*
Daejeon
Polymerization*
Polymers*
Compomers
Polymers

Figure

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  Fig. 1 Schematic diagram of custom made linometer with a sample in place

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  Fig. 2 Schematic drawing of the custom made polymerization shrinkage stress measuring machine with a sample in place

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  Fig. 3 Change of the amount of linear polymerization shrinkage versus time in tested materials.

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  Fig. 4 Change in the polymerization stress versus time.

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