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:: Volume 11, Issue 3 (J Res Dent Sci 2014) ::
J Res Dent Sci 2014, 11(3): 167-174 Back to browse issues page
Evaluating the Discoloration Effect of Tea on Kalore and Gradia Composites
N Nasoohi Dr, KH Khorgami Dr * , Z Tasugi Dr, N Aryan Dr
Specilalist in Restorative Dentistry , khorshidkh@yahoo.com
Abstract:   (5859 Views)

 

 

 

ABSTRACT

 

Background and Aim: Discoloration of composite restorations over time is among common factors causing their replacement, which weakens the tooth structure and causes pulpal injury. Since tea is a common drink among Iranians, the current study aimed to evaluate the discoloration effect of tea on Kalore and Gradia composite resins.

 

Materials and Methods: This experimental study was performed on 20 disc-shaped specimens of two composites, Kalore and Gradia.  Ten specimens of each composite type with subgroups of 5 were stored in tea and distilled water for 72 Hours. Color measurements were obtained using Spectrophotometer (Minolta, Japan) before and after immersion in solutions. Final spectrophotometry was done after polishing. The results were analyzed using Kruskal-Wallis test.

 

Results: The discoloration value of both composites increased significantly after being immersed in tea (P<0.001). Discoloration in Kalore was higher than Gradia (P<0.014) and amount of discoloration was clinically unacceptable for both composites. (&Delta;E >3/3) After final polishing of the samples kept in tea, amount of discoloration decreased for both composites (P<0.001) and (P=0.002) respectively this reduction was more prominent in Kalore (P=0.008). Nonetheless, discoloration value was yet clinically unacceptable

 

Conclusion: Immersing the composites in tea caused clinically unacceptable amount of discoloration in both Gradia and Kalore and polishing had more corrective effect on Kalore.

 

Keywords: Composite resins, Gradia, aesthetics, dental, nanocomposites
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Type of Study: original article | Subject: oral surgery
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Nasoohi N, Khorgami K, Tasugi Z, Aryan N. Evaluating the Discoloration Effect of Tea on Kalore and Gradia Composites. J Res Dent Sci. 2014; 11 (3) :167-174
URL: http://jrds.ir/article-1-493-en.html


Volume 11, Issue 3 (J Res Dent Sci 2014) Back to browse issues page
مجله تحقیق در علوم دندانپزشکی Res Dent Sci
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