Polymerization shrinkage stress of contemporary dental composites: Comparison of two measurement methods
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- SZCZESIO-WLODARCZYK Agata
- University Laboratory of Materials Research, Medical University of Lodz
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- GAROUSHI Sufyan
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku
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- VALLITTU Pekka
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku Wellbeing Services County of South-West Finland
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- BOCIONG Kinga
- Department of General Dentistry, Medical University of Lodz
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- LASSILA Lippo
- Department of Biomaterials Science and Turku Clinical Biomaterials Center-TCBC, Institute of Dentistry, University of Turku
Abstract
<p>The aim of this study was to compare two testing methodologies employed for assessing the polymerization shrinkage stress of dental resin composites. Ten commercial resin composites were investigated (EverX Posterior & Flow; G-ænial Anterior, Posterior, A’CHORD & Universal Injectable; Filtek One Bulk Fill & Universal Restorative; SDR flow+ and Aura Bulk Fill). Photoelastic and contraction forces measurement methods were performed. The slope of the linear trendline and C-factor of specimens were calculated. The shrinkage stress values (range between: 6.4–13.4 MPa) obtained by the photoelastic method were higher for all resin composites than the values obtained by contraction forces measurements (range between 1.2–4.8 MPa). However, there was a strong linear correlation between these methods (r=0.8). The use of both investigated methods revealed important information about the shrinkage behavior of the restorative resin composites.</p>
Journal
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- Dental Materials Journal
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Dental Materials Journal 43 (2), 155-163, 2024-03-25
The Japanese Society for Dental Materials and Devices