The effects of irradiance and exposure time on the surface roughness of bulk-fill composite resin restorative materials.

Publisher: Medical Services Department, Saudi Arabian Armed Forces, Ministry Of Defence And Aviation Country of Publication: Saudi Arabia NLM ID: 7909441 Publication Model: Print Cited Medium: Internet ISSN: 1658-3175 (Electronic) Linking ISSN: 03795284 NLM ISO Abbreviation: Saudi Med J Subsets: MEDLINE

Publication: Riyadh : Medical Services Department, Saudi Arabian Armed Forces, Ministry Of Defence And Aviation
Original Publication: Riyadh, Saudi Arabia, Riyadh Al-Kharj Hospital Programme.

Light* ; Light-Curing of Dental Adhesives*; Composite Resins/*radiation effects; Materials Testing ; Surface Properties/radiation effects ; Time Factors

Objectives: To evaluate the surface roughness of 4 different bulk-fill resin-based composites cured using different irradiance levels. Methods: This in vitro study was performed in February 2017 to August 2017 at the College of Dentistry, King Saud University. Twenty-four specimens were prepared from each of the bulk-fill materials [Tetric N-Ceram (TNC), SonicFill (SF), Smart Dentin Replacement (SDR), and Filtek Bulk-Fill (FB)] using a brass metal mold, resulting in a total of 96 specimens, cured using a Bluephase N light curing unit. Half of the total number of specimens (N=48) were cured using high-power irradiance (1200 mW/cm2) for 20 seconds, while the remaining half (N=48) were cured using low power irradiance (650 mW/cm2) for 40 seconds. After 24 hours, baseline surface roughness of each specimen was analyzed using a profilometer, then polished using Sof-lex abrasive disks, and the surface roughness of all groups was assessed. Results: Post-polished SonicFill cured at high irradiance had the highest mean surface roughness (0.23±0.03), whereas pre-polished Smart Dentin Replacement (0.11±0.01) and SonicFill (0.11±0.02) cured at low irradiance had the lowest mean surface roughness. Conclusion: High curing irradiance (1,200 mW/cm2) had no positive influence on the surface roughness of Filtek Bulk Fill and Tetric N-Ceram bulk-fill RBCs compared with lower curing irradiance (650 mW/cm2). However, the difference of curing irradiance significantly affected the surface roughness in SDR and sonic fill RBCs.

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0 (Composite Resins)
0 (Filtek Bulk Fill)
0 (Smart Dentin Replacement)
0 (SonicFill)
0 (Tetric ceram)

Date Created: 20180214 Date Completed: 20180907 Latest Revision: 20181113

20250114

PMC5885098

10.15537/smj.2018.2.21440

29436570