Handling properties and surface characteristics of universal resin composites
| Autor: | Eizo Hirokane, Ryo Ishii, Masashi Miyazaki, Nobuya Kitahara, Akimasa Tsujimoto, Munenori Yokoyama, Toshiki Takamizawa, Tomohiko Tamura |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Surface (mathematics)
Materials science Surface Properties Resin composite Stiffness Composite Resins Gloss (optics) Surface energy Contact angle Hardness Mechanics of Materials Materials Testing medicine Knoop hardness test Surface roughness General Materials Science medicine.symptom Composite material General Dentistry |
| Zdroj: | Dental Materials. 37:1390-1401 |
| ISSN: | 0109-5641 |
| Popis: | Objective This study investigated the handling and surface characteristics of universal resin composites and determined the interrelations among the composites’ handling, mechanical, and physical properties. Methods Five recently introduced universal resin composites were tested. Twelve specimens per material were used to measure the stiffness and stickiness (handling properties) of the resin composite pastes. Additionally, surface properties (Knoop hardness number [KHN], surface roughness [Sa], surface gloss [SG], water contact angle [CA], and surface free energy [SFE]) of cured resin composites were determined in 12 specimens per material immediately after preparation (baseline) and after subjection to thermal cycles (TCs). Results Handling and surface properties of the resin composites were material dependent. All the resin composites showed significantly lower KHN in the post-TC subgroups than that in the baseline subgroups. However, the influence of TC on the other surface properties was dependent on the material used. Some resin composites did not indicate any significant differences in Sa, SG, or CA between the baseline and post-TC groups. Significance Although the resin composites in the baseline groups presented with different handling and surface properties, the surface properties of most of the composites were significantly affected by TC. Extremely strong positive or negative correlations were observed between stiffness and stickiness, KHN and Sa, KHN and SG, Sa and SG, and CA and SFE. Most correlations between the handling and surface properties were weak. Therefore, the selection of resin composites in clinical situations should be based on comprehensive consideration of their properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect