Document Detail

Influence of shade and light-curing distance on the degree of conversion and flexural strength of a dual-cure core build-up resin composite.
MedLine Citation:
PMID:  22779283     Owner:  NLM     Status:  In-Process    
PURPOSE: To investigate the influence of shade and light-curing distance on the degree of conversion (DC) and flexural strength (FS) of a dual-cure core build-up resin composite.
METHODS: 135 specimens were prepared and divided into three main groups according to the shade of the composite core material; dentin, blue and white shades. Each group was further subdivided into three subgroups according to the light-curing distance; 0 mm, 3 mm and 5 mm. The DC was measured using FTIR spectrometer. For testing the FS, the mini flexural test specimens were prepared and subjected to three point bending test in a universal testing machine. The results were analyzed using two-way and one-way ANOVA followed by Duncan's Multiple Range Test. The significance level was set at P = 0.05.
RESULTS: Both the DC and FS of the dual-cure core build-up material used in this study were influenced by the shade of the material and the light-curing distance. The blue shade exhibited the highest percentage DC values while the white shade revealed the lowest percentage DC. The dentin shade at 0 mm light-curing distance exhibited the highest mean FS value; however the 3 mm and 5 mm light-curing distance of the white shade showed the lowest mean FS values.
Farid S El-Askary; Dalia I El-Korashy
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  American journal of dentistry     Volume:  25     ISSN:  0894-8275     ISO Abbreviation:  Am J Dent     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-07-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8806701     Medline TA:  Am J Dent     Country:  United States    
Other Details:
Languages:  eng     Pagination:  97-102     Citation Subset:  D    
Department of Operative Dentistry, Ain-shams University, Nasr City, Cairo, Egypt.
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