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:: Volume 24, Issue 4 (10-2012) ::
J Islam Dent Assoc Iran 2012, 24(4): 152-158 Back to browse issues page
Microleakage Evaluation of a Hydroxyapatite Base in Comparison with a Resin Modified Glass Ionomer Cement in Vitro
Sepideh Banava 1, Parisa Poorbaghi2, Saeid Nemati Anaraki3, Farzaneh Aghajani4, Soheil Noohi2, Mohammad javad Kharrazifard5, Hosain Inanloo6
1- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Azad University. Tehran, Iran , sbanava@yahoo.com
2- Dentist
3- Assistant Professor, Department of Restorative Dentistry, School of Dentistry, Islamic Azad University. Tehran, Iran
4- Member of Dental Materials Reference Lab, School of Dentistry, Tehran University of Medical Sciences. Tehran, Iran
5- Dentist, Epidemiologist, Member of Research Center of Dental Faculty, Tehran University of Medical Sciences. Tehran, Iran
6- Postgraduate Student, Department of Restorative Dentistry, School of Dentistry, Azad University. Tehran, Iran
Abstract:   (8719 Views)
     Background and Aim : Many attempts have been done to improvethe quality,properties and composition of dental materials to decrease the microleakage and its consequences.The objective of this invitro study was to compare microleakage of light cure resin modified glass ionomer cement and a hydroxyapatite containing base .

  Materials and Methods : In this experimental study 40 intact human premolars were divided into 4 groups. On the buccal surface of each tooth, around cavity was prepared with 3 mm in diameter and at least 1 mmdeep into dentin.Teeth were restored using L.C resin modified glass ionomer lining cement,L.C resin modified glass ionomer restorative cement, Lime-Lite with bonding agent, and Lime – Lite without bonding agent.After thermocycling the specimens were immersed in AgNO3 solution for 2 hours.After sectioning the specimens, dye leakage wad evaluated by a stereomicroscope. Microleakage was graded according to ISO 11 405 in occlusal and gingival cavity margins. Obtaineddata were statisticallyanalysed by Kruskal-Wallis, Wilcoxon and Mann-Whitney tests .

  Results : Most of the samples in group 3 (lime – lite with bonding agent) demonstrated zeromicroleakage grades in gingival and occlusal cavity margins and in group 4 (Lime – Lite – without bonding agant) the majority of samples showedgrade 3 microleakagein both margins. These findings is both margins were significantly higher than those of other groups (p< 0.05), but there were not significant differences among glass ionomer groups in marginal microleakage (p> 0.05 ).

  Conclusion : Hydroxyapatite containing base showed more microleakage compared with glass ionomer cement, but application of a bonding agent prior to its placement was effective in reducing its microleakage .

 

 

 

Keywords: Microleakage, Glass Ionomer, Hydroxyapatite cement
Full-Text [PDF 170 kb]   (1730 Downloads)    
Type of Study: Orginal | Subject: Restorative Dentistry
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Banava S, Poorbaghi P, Nemati Anaraki S, Aghajani F, Noohi S, Kharrazifard M J et al . Microleakage Evaluation of a Hydroxyapatite Base in Comparison with a Resin Modified Glass Ionomer Cement in Vitro. J Islam Dent Assoc Iran. 2012; 24 (4) :152-158
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Volume 24, Issue 4 (10-2012) Back to browse issues page
Journal of Islamic Dental Association of Iran

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