Consistency in the amount of linear polymerization shrinkage in syringe-type composites |
| |
Authors: | S -H Park I Krejci F Lutz |
| |
Institution: | Department of Conservative Dentistry, Yonsei University, Seoul, South Korea. suhghopark@yumc.yonsei.ac.kr |
| |
Abstract: | OBJECTIVES: The purpose of this study was to investigate whether the composite resin in a syringe showed a consistent shrinkage through its content. Additionally, the amount of linear shrinkage was compared between materials. METHODS: Five brands of syringe-type and one brand of carpule-type composite resins were used in this study. To each brand, two to three syringes were assigned. In the carpule-type composite, 15 carpules were used. The linear polymerization shrinkage was measured using a custom-made linometer. In this linometer, the amount of displacement of an aluminum disk, which was caused by the linear shrinkage of composite resin, was recorded by a computer every second for 90 s. RESULTS: The syringe-type composites showed similar consistencies in the amount of linear shrinkage except one. The linear shrinkage of the carpule-type Tetric Ceram showed more consistency compared with syringe-type composites. The amount of linear polymerization shrinkage varied between materials. SIGNIFICANCE: This investigation demonstrates that the use of carpule-type composites is recommended instead of syringe-types, because of the consistency in its linear shrinkage. The custom-made linometer provides an effective way to study polymerization shrinkage. |
| |
Keywords: | Composite resin Polymerization shrinkage Syringe-type composite Carpule-type composite Linometer |
本文献已被 ScienceDirect 等数据库收录! |
|