ISSN 2756-3421
African Journal of Dentistry ISSN: 3216-0216 Vol. 5 (2), pp. 071-075, February, 2017. © International Scholars Journals
Full Length Research Paper
Effect of different light curing systems on the shear bond strength of resin-modified glass ionomer cement and polyacid-modified composite resin
Oya Bala, Hacer Deniz Arisu*, Bagdagul Helvacioglu Kivanc and Sara Samur
University of Gazi, Faculty of Dentistry, Department of Operative Dentistry and Endodontics, Ankara, Turkey.
*Corresponding author. E-mail: [email protected]; [email protected]. Tel.: + 90 532 6461244, + 90 312 3802405. Fax: +90 312 2239226.
Accepted 16 June, 2009
Abstract
The aim of this study was to determine in vitro shear bond strength of resin-modified glass ionomer cement (RMGIC) and polyacid-modified composite resin (PMCR) polymerized with conventional halogen light curing unit (LCU) or light emitting diode (LED). Twenty-four mandibular molar teeth were used. Enamel was removed from buccal and lingual surfaces of the teeth to expose superficial dentin. Teeth were embedded in acrylic resin molds. Plastic rings were placed on the buccal and lingual-exposed superficial dentin. The teeth were then randomly divided into four groups. The study groups were designed as: Group A: PMCR, polymerized with conventional halogen LCU, Group B: RMGIC, polymerized with conventional halogen LCU, Group C: PMCR, polymerized with LED LCU, Group D: RMGIC, polymerized with LED LCU. The shear bond strength for each specimen was measured with a universal testing machine at a cross-head speed of 0.5 mm/min. Data were analyzed with ANOVA and Turkey tests at a preset of 0.05. Values in Group 1 were significantly lower than in Groups 2, 3 and 4 (p < 0.05). There was no significant difference between Groups 2, 3 and 4 (p > 0.05). The shear bond strength values of LED LCU were significantly higher than that of halogen LCU (p < 0.05). The shear bond strength values of RMGIC were significantly higher than that of PMCR (p < 0.05).
Key Words: Resin modified glass ionomer cement, polyacid modified resin composite, halogen, light emitting diode, shear bond strength.