Effect of light intensity on the cure characteristics of photo-polymerised dental composites
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Date
2013Author
Kassim, BA
Kisumbi, BK
Lesan, WR
Gathece Loice W.
Type
ArticleLanguage
enMetadata
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Objective: To determine the light intensity emitted by light curing units (LCUs) and its effect on the cure characteristics of composites polymerised with it.
Design: A laboratory based cross sectional study.
Setting: Public and private dental clinics in Nairobi, Kenya.
Results: Thirty five (42.17%) LCUs produced light of intensity .300mWcm-2 while 43 (51.8%) LCUs had their intensities between 300 and 1200mWcm-2. Mean DOC and surface hardness for the 0-300mWcm-2 LCUs was 1.34mm and 46.60VHN respectively. The mean DOC increased steadily from the lowest intensity group (1.34mm) to the 1200-1500mWcm-2 group (2.32 mm) and then declined to 1.98mm for the 1500-1800mWcm-2 group. Statistical analysis showed significant differences in the mean DOC (p=0.000) and surface micro-hardness (p=0.002) for the different intensity groups.
Conclusion: Light intensity output of LCUs has a significant influence on the cure characteristics of dental composites with both DOC and surface micro-hardness increasing with increase in light intensity up to 1500mWcm-2.
URI
http://www.ajol.info/index.php/eamj/article/view/89601http://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/40433
Citation
Kassim, B. A., Kisumbi, B. K., Lesan, W. R., & Gathece, L. W. (2013). Effect of light intensity on the cure characteristics of photo-polymerised dental composites. East African Medical Journal, 89(5), 159-165.Publisher
University of Nairobi College of Health Sciences,University of Nairobi
Collections
- Faculty of Health Sciences (FHS) [10378]