[Home ] [Archive]    
:: Main :: About :: Current Issue :: Archive :: Search :: Submit :: Contact :: In Press ::
:: Volume 24, Issue 3 (7-2012) ::
2012, 24(3): 69-78 Back to browse issues page
Effect of Mechanical Load Cycling on Class V Glass-Ionomer and Composite Restorations; A Microleakage and Scanning Electron Microscopic Evaluation
Esmaeil Yassini , Hamid Kermanshah , Mansoreh Mirzaei , Baharan Ranjbar Omidi
, baharan_o@yahoo.com
Abstract:   (6535 Views)

 Effect of mechanical load cycling on class V glass- ionomer and composite restorations a microleakage and scanning electron microscopic evaluation

  Dr. Yassini E .,1 Dr. Kermanshah H ., 2 Dr. Mirzaei M .,2 Dr. Ranjbar Omidi B. 3

  

  1 Professor, Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences . Tehran, Iran . 2 Assistant Professor , Department of Operative Dentistry, School of Dentistry, Tehran University of Medical Sciences . Tehran, Iran . 3 Assistant Professor , Department of Operative Dentistry, School of Dentistry, Qazvin University of Medical Sciences . Qazvin , Iran .

  (Received 9 June, 2011 Accepted 29 August, 2011)

  

  Abstract

 

  Background and Aim : Microleakage is an important problem with direct restorations and familiarity with its contributing factors is of utmost importance. The aim of this study was scanning electron microscopic evaluation of marginal integrity in three types of class V tooth-colored restorations and the effect of load cycling on their microleakage .

  Materials and Methods : In this in vitro study, class V cavity preparations were made on the buccal and lingual surfaces of 30 bovine incisors (60 cavities). The specimens were divided into three groups (n=10 each or 20 cavities) and restored as follows: group 1: with Filtek Z350 (nanocomposite), group 2: Fuji IX/G Coat Plus (CGIC), and group 3: Fuji II LC (RMGI ).

  All specimens were finished and polished immediately and were thermocycled (×2000, 5-50 °C). In each group, half of the teeth were load cycled .Epoxy resin replicas of 12 specimens were evaluated under FE-SEM and interfacial gaps were measured. Finally the teeth were immersed in 0.5% basic fuchsine dye for 24 hours at room temperature, sectioned and observed under stereomicroscope. Data were analyzed with Kruskal-Wallis and Mann-Whitney U tests and a comparison between incisal and cervical microleakage was made with Wilcoxon test .

  Results : It was shown that the mechanical load cycling caused a statistically significant increase in cervical microleakage of Fuji IX and Fuji II LC and in incisal microleakage of Fuji II LC. Microleakage in Z350 with load-cycling and Fuji IX with and without load-cycling was significantly higher in cervical compared with incisal area. Both incisal and cervical microleakage were significantly different among these materials under load-cycling. ) Fuji II LC < Fuji IX < Z350 ).

  Conclusion : It was concluded that the marginal sealing ability of Fuji IX under load-cycling was better than that of Fuji II LC. Z350 showed better marginal integrity while being load-cycled than both Fuji II LC and Fuji IX .

  Key words : Microleakage - Glass ionomer cement - Composite resin

  

  Corresponding Author: Dr. Ranjbar Omidi ., Assistant Professor , Department of Operative Dentistry, School of Dentistry, Qazvin University of Medical Sciences . Qazvin , Iran .

  e.mail: baharan_o@yahoo.com

 

Keywords: Microleakage, Glass ionomer cement, Composite resin
Full-Text [PDF 250 kb]   (1782 Downloads)    
Type of Study: Research | Subject: Restorative Dentistry
Send email to the article author

Add your comments about this article
Your username or Email:

CAPTCHA code


XML     Print


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

Yassini E, Kermanshah H, Mirzaei M, Ranjbar Omidi B. Effect of Mechanical Load Cycling on Class V Glass-Ionomer and Composite Restorations; A Microleakage and Scanning Electron Microscopic Evaluation . Journal of Islamic Dental Association of IRAN (JIDA) . 2012; 24 (3) :69-78
URL: http://jidai.ir/article-1-1246-en.html


Volume 24, Issue 3 (7-2012) Back to browse issues page
Journal of Islamic Dental Association of Iran

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 31 queries by YEKTAWEB 3790