Journal of International Society of Preventive and Community Dentistry

ORIGINAL ARTICLE
Year
: 2018  |  Volume : 8  |  Issue : 2  |  Page : 99--103

The effect of expiration date on mechanical properties of resin composites


Joseph Sabbagh1, Fidele Nabbout2, Edgard Jabbour1, Gaetane Leloup3 
1 Department of Restorative Dentistry and Endodontics, School of Dentistry, Lebanese University, Beirut, Lebanon
2 Department of Orthodontics, School of Dentistry, Lebanese University, Beirut, Lebanon
3 Center for Research and Engineering on Biomaterials, Université catholique de Louvain, Brussels, Belgium

Correspondence Address:
Prof. Joseph Sabbagh
Department of Restorative Dentistry and Endodontics, School of Dentistry, Lebanese University, Beirut
Lebanon

Objective: The aim of this in vitro study is to evaluate the effect of expiration date on some mechanical properties of resin composites after controlled storage of syringes and compules in a refrigerator at 4°C. Materials and Methods: Specimens were tested at 7 days after storage in distilled water at room temperature. The investigated properties are the static modulus of elasticity, the flexural strength, and the Vickers microhardness. Same batches of restorative materials were examined at baseline (at least 1 year before their expiration date) and 1 year after they expired. Results: Paired t-test is used to compare the results between the two groups using StatView software (version 5.0) SAS Campus Drive Cary, North Carolina, USA. Except for the flexural strength, no statistical differences were found between the mechanical properties of the expired and the unexpired group. Conclusion: The 1-year expiry date did not seem to affect the investigated mechanical properties.


How to cite this article:
Sabbagh J, Nabbout F, Jabbour E, Leloup G. The effect of expiration date on mechanical properties of resin composites.J Int Soc Prevent Communit Dent 2018;8:99-103


How to cite this URL:
Sabbagh J, Nabbout F, Jabbour E, Leloup G. The effect of expiration date on mechanical properties of resin composites. J Int Soc Prevent Communit Dent [serial online] 2018 [cited 2019 Nov 14 ];8:99-103
Available from: http://www.jispcd.org/article.asp?issn=2231-0762;year=2018;volume=8;issue=2;spage=99;epage=103;aulast=Sabbagh;type=0