Paper Information

Journal:   JOURNAL OF DENTAL MEDICINE   WINTER 2016 , Volume 28 , Number 4; Page(s) 290 To 297.
 
Paper: 

MICRO LEAKAGE OF CLASS V CAVITIES RESTORED WITH NANO FILLED RESIN MODIFIED GLASS IONOMER AND CONVENTIONAL GLASS IONOMER WITH SELF ETCH ADHESIVE AND SELF ETCH PRIMER

 
 
Author(s):  MIRZAIE MANSORE, YASINI ESMAIEL, RANJBAR OMRANI LADAN, ROKNI MORTEZA, DARVISHPOUR HOJAT*
 
* 
 
Abstract: 

Background and Aims: Micro leakage is a criterion proposed for assessing the success of any restorative material. Complete seal is difficult especially for dentin margins compared to enamel margins. The aim of this study was to assess the micro leakage at the enamel and dentin margins of class V cavities restored by two GIs and two self-etch adhesive systems.
Materials and Methods: This study was done on forty third molars. Class V cavities (3
´2´2mm) were prepared on the buccal and lingual surfaces of teeth using high speed handpiece with 0.8 mm diamond fissure burr. The occlusal margins of the cavities in the enamel and gingival margins were placed 1 mm below the CEJ. The teeth were divided into 4 groups and the bondings were cured for 20 sec and the teeth were restored. The specimens were kept in distilled water at the temperature of 37°C for 24 hrs. The teeth were thermo cycled and cut in buccolingual direction using diamond disc under water. The dye penetration was evaluated using a stereomicroscope and the leakage was scored. The scores were compared using Kruskal-Wallis test while the paired comparisons were done using Bonferroni correction. P?0.05 was regarded as significant results.
Results: Micro leakage scores were similar at the occlusal and gingival walls of all test groups. At the gingival walls, the least micro leakage scores were observed. “Fuji IX + SE bond” group showed significant differences with the “Fuji IX + G bond” and “Nano glass + G bond” groups (P
£0.05). At the occlusal walls, the least scores were observed in the “Fuji IX+SE bond” specimens which were significantly different from the other groups (P£0.05).
Conclusion: Self-Cure glass ionomers yielded less micro leakage scores compared to the different types of light-cures due to the less polymerization shrinkage.

 
Keyword(s): LEAKAGE, GLASS IONOMER CEMENT, BONDING
 
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