[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit ::
Main Menu
Journal Information::
Editorial Policies::
Articles archive::
For Authors::
Contact us::
Site Facilities::
::
Search in website

Advanced Search
Receive site information
Enter your Email in the following box to receive the site news and information.
Last site contents
:: Contact Us
:: Volume 34, Issue 1 And 2 (1-2022) ::
J Iran Dent Assoc 2022, 34(1 And 2): 27-35 Back to browse issues page
Effect of Shade on Immediate and Post-Curing Polymerization Shrinkage of Composite Resin
Azita Kaviani * 1, Parisa Goudarzi2
1- Assistant Professor, Department of Operative Dentistry, School of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran , kaviani_a@yahoo.com
2- MD Student of Dentistry, School of Dentistry, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
Abstract:   (843 Views)
Background and Aim: Minimizing the polymerization shrinkage of composite resins is a critical goals in composite restorations. Many factors affect polymerization shrinkage. This study aimed to evaluate the effect of composite resin shade on polymerization shrinkage.
Materials and Methods: In this in vitro study, 14 composite discs measuring 1.5×8 mm were fabricated. The samples were prepared using the A2 and WB shades of G-aenial composite resin. Composite resin discs were placed in a brass ring bonded to a glass slide. Another glass slide was placed over it. The samples were light-cured at 750 mW/cm2 light intensity for 20 seconds. Polymerization shrinkage (shrinkage re-action) and its strain rate were measured for up to 600 seconds after the onset of irra-diation by the bonded disc technique and a linear variable differential transformer (LDTV) machine. Data were analyzed by independent-sample t-test (P≤0.05).
Results: The polymerization shrinkage strain at 20 and 600 seconds was not significantly different between the WB and A2 shades of G-aenial composite resin. The differences in polymerization shrinkage in each group at 20 and 600 seconds were significant (P<0.000). The difference in the shrinkage rate between the two groups up to 20 seconds was not significant (P=0.505).
Conclusion: The polymerization shrinkage of G-aenial composite resin was not affected by shade. However, in both shades, polymerization shrinkage showed a sig-nificant difference immediately after irradiation and 600 seconds after that.
Keywords: Composite Resins, Polymerization, color
Full-Text [PDF 873 kb]   (485 Downloads)    
Type of Study: Original | Subject: Restorative Dentistry
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA


XML     Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Kaviani A, Goudarzi P. Effect of Shade on Immediate and Post-Curing Polymerization Shrinkage of Composite Resin. J Iran Dent Assoc 2022; 34 (1 and 2) :27-35
URL: http://jida.ir/article-1-2188-en.html


Rights and permissions
Creative Commons License This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Volume 34, Issue 1 And 2 (1-2022) Back to browse issues page
Journal of Iranian Dental Association

AWT IMAGE

This work is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License which allows users to read, copy, distribute and make derivative works for non-commercial purposes from the material, as long as the author of the original work is cited properly

Persian site map - English site map - Created in 0.06 seconds with 37 queries by YEKTAWEB 4652