Journal of Research and Advancement in Dentistry
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Official publication of Magadh University and Kolhan University, Government of Bihar and Jharkhand, India
Year : 2015
Volume : Volume 5
Issue : Issue 2
Address for correspondence :
Dr. V Rajasekhar
rajasekhar.vemareddy@gmail.com
Background: Packable composites are commonly used as posterior restorative materials. However, disadvantages like polymerization shrinkage limit their use. The aim of this study was to investigate the marginal leakage at the gingival seat of the proximal box of Class II cavities restored with posterior packable composite(Solitaire-2) using different liner materials The liners used were flowable resin composite(Flowline) and resin modified glass ionomer cement (Fuji II LC GC) using open sandwich technique. Assessment was done at the gingival seat of the proximal box located above the cemento-enamel junction (CEJ) in enamel. Materials and Methods: Thirty recently extracted human upper premolars were prepared with standardized Class- II cavities as follows; Occlusal Outline Form: 2mm in bucco-lingual width and 1.5 mm in depth measured from occlusal fissure to pulpal floor. Proximal Boxes: The depth of the proximal box from the proximal cavosurface margin to the axial wall was 3 mm, so as the bucco-lingual width (2mm). The proximal box margin located 1 mm coronal to the CEJ (in enamel). The teeth were assigned into 3 groups (n=10): Group-I (control): acid etching (Gluma etch 20 gel)) + bonding agent (Gluma comfort bond) + posterior packable composite (solitaire-2), Group-II (RMGIC): acid etching + resin modified glass ionomer cement (Fuji II LC GC) + posterior packable composite; Group-III (Flowable): acid etching + bonding agent + flowable composite (Flowline) + posterior packable composite. The teeth were immersed in distilled water at 37ºC for 24 h., then thermocycled (1000X, 5°-55°C, 30 sec. dwell time) and immersed in 0.5% Rhodamine B solution for 24 h., after that the teeth were sectioned longitudinally in mesiodistal direction and dye penetration in millimeters was measured in each cavity by using fluorescent microscope. Data obtained was analyzed using ANOVA and LSD tests at 0.05 significance level. Conclusion: The use of flowable composite (Flowline) and resin modified glass ionomer (Fuji II LC GC) in the open sandwich technique was shown to decrease the marginal leakage of posterior packable composite (Solitaire-2).
Keywords: Flowable composite, marginal leakage, RMGIC and packable composite.
