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:: Volume 24, Issue 3 (7-2012) ::
J Islam Dent Assoc Iran 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 Yassini1, Hamid Kermanshah2, Mansoreh Mirzaei2, Baharan Ranjbar Omidi *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. , baharan_o@yahoo.com
Abstract:   (6858 Views)
      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 .

 

 

 

Keywords: Microleakage, Glass ionomer cement, Composite resin
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Type of Study: Orginal | Subject: Restorative Dentistry
References
1. 1- Litonjua LA, Andreana S, Bush PJ, Tobias TS, Cohen RE. Noncarious cervical lesions and abfractions: A reevaluation. J Am Dent Assoc. 2003 Jul;134(7):845-850.
2. Bergenholtz G, Cox CF, Loesche WJ, Syed SA. Bacterial leakage around dental restorations: Its effect on the dental pulp. J Oral Pathol. 1982 Dec;11(6):439-450.
3. Jang KT, Churg DH, Shin D, Garcia-Godoy F.Effect of eccentric load cycling on microleak-age of class v flowable and packable composite resin restorations. Oper Dent. 2001 Nov-Dec;26(6):603-608.
4. Manhart J, Chen HY, Mehl A, Weber K, Hickel R. Marginal quality and microleakage of adhesive ClV restorations. J Dent. 2001 Feb; 29 (2):123-130.
5. Beznos C. Microleakage at the cervical mar-gin of class II cavities with different restorative techniques. Oper Dent. 2001 Jan-Feb;26(1):60-69.
6. Demarco FF, Ramos OL, Mota CS, Formola E, Justino LM. Influence of different restorative techniques on microleakage in class II cavities with gingival wall in cementum. Oper Dent. 2001 May-Jun;26(3):253-259.
7. Derhami K, Coli P, Brannstorm M. Microle-akage in class II composite resin restorations. Oper Dent. 1995 May-Jun;20(3):100-105.
8. Ferrari M, Cagidiaco MC, Davidson CL. Re-sistance of cementum in class II and v cavities to penetration by an adhesive system. Dent Ma-ter. 1997 May;13(3):157-162.
9. Ferrari M, Mason PN, Fabianelli A, Cagidiaco MC, Kugel G, Davidson CL. Influence of tissue characteristics at margins on leakage of class II indirect porcelain restorations. Am J Dent. 1999 Jun;12(3):134-142.
10. Hilton TJ, Schwartz RS, Ferracane JL. Mi-croleakage of four class II resin composite in-sertion techniques at intra oral temperature. Quint Int. 1997 Feb;28(2):135-44.
11. Neme AL, Maxson BB, Pink FE, Aksu MN. Microleakage of class II packable composites lined with flowables: An invitro study. Oper Dent. 2002 Nov-Dec;27(6):600-605.
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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 . J Islam Dent Assoc Iran. 2012; 24 (3) :69-78
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Volume 24, Issue 3 (7-2012) Back to browse issues page
Journal of Islamic Dental Association of Iran

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