Effectiveness of four different light-activated composites cure with different light energy densities
Joint Authors
al-Azzawi, Haytham J.
al-Shekhli, Ali A.
al-Aubi, Isra A.
Source
Journal of Baghdad College of Dentistry
Issue
Vol. 18, Issue 3 (30 Sep. 2006), pp.12-16, 5 p.
Publisher
University of Baghdad College of Dentistry
Publication Date
2006-09-30
Country of Publication
Iraq
No. of Pages
5
Main Subjects
Topics
Abstract EN
Background : This study investigated the influence of light energy density (intensity x time) on the effectiveness of composite cure in view of the curing profiles of light-polymerization units with different light- activated composites to determine the energy density that satisfies adequate polymerization of all light-activated composites types used in this study.
Materials and methods : This study investigated the hardness of the top / bottom surfaces and hardness ratio of two mm thick composite specimens after exposure to different light energy densities.
Parameters included five light intensities (200, 300, 400, 500 and 600 mW / cm2) and seven irradiation times (20, 40, 60, 90, 120, 150 and 180 seconds) for each of the four different light-activated composite materials (Tetric Ceram, Heliomolar, Herculite XRV and Degufill Mineral).
Results : Statistical analysis of the data by using the one-way analysis of variance revealed that, most of the hardness ratios exhibited a very highly significant difference according to intensity, composite type and curing time.
The results indicated that, Heliomolar and Degufill Mineral light-activated composites required approximately (36 J / cm²) energy density for adequate polymerization for a two-mm thick specimen while, Herculite XRV and Tartaric Ceram light-activated composites required approximately (12 J / cm²) energy density for adequate polymerization for a 2-mm thick specimen.
Conclusion : This study indicated that, final curing should not be done with energy density less than (300 mW / cm2 for 120 seconds, 400 mW / cm2 for 90 seconds and 600 mW / cm2 for 60 seconds) for Heliomolar and Degufill Mineral light-activated composites.
American Psychological Association (APA)
al-Shekhli, Ali A.& al-Azzawi, Haytham J.& al-Aubi, Isra A.. 2006. Effectiveness of four different light-activated composites cure with different light energy densities. Journal of Baghdad College of Dentistry،Vol. 18, no. 3, pp.12-16.
https://search.emarefa.net/detail/BIM-289075
Modern Language Association (MLA)
al-Shekhli, Ali A.…[et al.]. Effectiveness of four different light-activated composites cure with different light energy densities. Journal of Baghdad College of Dentistry Vol. 18, no. 3 (2006), pp.12-16.
https://search.emarefa.net/detail/BIM-289075
American Medical Association (AMA)
al-Shekhli, Ali A.& al-Azzawi, Haytham J.& al-Aubi, Isra A.. Effectiveness of four different light-activated composites cure with different light energy densities. Journal of Baghdad College of Dentistry. 2006. Vol. 18, no. 3, pp.12-16.
https://search.emarefa.net/detail/BIM-289075
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 16
Record ID
BIM-289075