Effect of high-irradiance light curing on exposure times and pulpal temperature of adequately polymerized composite
| Autor: | Wen Lien, Ryan R. Sheridan, William E Slack, Rodney Phoenix, Kraig S Vandewalle, Erin M Yancey |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Molar
Curing Lights Dental Materials science Yield (engineering) High irradiance 0206 medical engineering Composite number Temperature 030206 dentistry 02 engineering and technology Composite Resins 020601 biomedical engineering Time Light curing 03 medical and health sciences 0302 clinical medicine Polymerization Hardness Materials Testing Ceramics and Composites Composite material Pulpal necrosis General Dentistry Light-Curing of Dental Adhesives |
| Zdroj: | Dental Materials Journal. 39:976-983 |
| ISSN: | 1881-1361 0287-4547 |
| DOI: | 10.4012/dmj.2019-236 |
| Popis: | This study investigated the effect of high-irradiance light-curing on exposure time and pulpal temperature of adequately-cured composite. Composite placed in a molar preparation was cured using high-irradiance light-curing units (Flashmax P3, Valo, S.P.E.C. 3 LED, Cybird XD) and tested for hardness occlusal-gingivally. The first group had exposure times set according to manufacturer settings (recommended), second group to yield 80% of maximum hardness at the 2 mm depth (experimental), and third group was set at 20 s (extended). Exposure time necessary to adequately polymerize the composite at 2 mm depth was 9 s for the Cybird XD and Valo and 12 s for S.P.E.C. 3 LED and Flashmax P3. None of the high-irradiance light-curing units adequately polymerized the composite at the manufacturer-recommended minimum-exposure times of 1-3 s. Exposure times necessary to adequately polymerize composite at 2 mm resulted in a maximum pulpal-temperature increase well below the temperature associated with possible pulpal necrosis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|