IADR Abstract Archives
Nanoleakage Assessment of Different Adhesive Restorative Materials Systems in Dentin of Primary Teeth (IN-VITRO STUDY)
Objectives: To compare nanoleakge of a self-adhering flowable composite, total etch adhesive system, self-etch adhesive system and glass ionomer based restorative material in Class V restorations in dentin of primary teeth
Methods: The study was conducted on 60 extracted human primary molars. Class V cavities were prepared in the labial surface, divided randomly into 4 groups and restored with:
Group 1: Self-adhering flowable composite (Vertise Flow, Kerr, USA). Group 2: Total etch adhesive system (Phosphoric Acid/OptiBond Solo Plus/Herculite ultra flow, Kerr, USA). Group 3: Self-etch adhesive system (Optibond All-In-One/Herculite ultraflowable, Kerr, USA). Group 4: Glass-ionomer based material (Polyacrylic Acid/Fuji II LC, GC Japan).
Nanoleakage test: After tooth preparation, restoration and thermocycling the restored teeth were immersed in 50% ammoniacal silver nitrate solution for 24 hours. Sectioned and examined with Energy Dispersive X-ray Analyses (EDX) to measure the quantity of silver-ion penetration and using scanning electron microscope (SEM) to observe the pattern of nanoleakage and given a score according to extent of leakage.
Ccorrelation was calculated between the results of EDX and the SEM scores.
Results: There was statistically significant difference in the percentage of silver penetration between the 4 groups, p〈0.001. SEM images captured showed absence of hybrid layer in its conventional form in group 1(SAFC). Group 2(TE) showed distinct hybrid layer and resin tags penetrating dentinal tubules with discrete areas of silver uptake. Group 3(SE) showed distinct uniform hybrid layer with absence of visible silver deposits. Group 4(GI) showed absence of distinct hybrid layer and presence of abundant silver deposits. There was strong, positive correlation between penetration of the silver and leakage, which was statistically significant.
Conclusions: Nanoleakage quantified by EDX and examined by SEM was least in SE, followed by TE, SAFC then GI
Methods: The study was conducted on 60 extracted human primary molars. Class V cavities were prepared in the labial surface, divided randomly into 4 groups and restored with:
Group 1: Self-adhering flowable composite (Vertise Flow, Kerr, USA). Group 2: Total etch adhesive system (Phosphoric Acid/OptiBond Solo Plus/Herculite ultra flow, Kerr, USA). Group 3: Self-etch adhesive system (Optibond All-In-One/Herculite ultraflowable, Kerr, USA). Group 4: Glass-ionomer based material (Polyacrylic Acid/Fuji II LC, GC Japan).
Nanoleakage test: After tooth preparation, restoration and thermocycling the restored teeth were immersed in 50% ammoniacal silver nitrate solution for 24 hours. Sectioned and examined with Energy Dispersive X-ray Analyses (EDX) to measure the quantity of silver-ion penetration and using scanning electron microscope (SEM) to observe the pattern of nanoleakage and given a score according to extent of leakage.
Ccorrelation was calculated between the results of EDX and the SEM scores.
Results: There was statistically significant difference in the percentage of silver penetration between the 4 groups, p〈0.001. SEM images captured showed absence of hybrid layer in its conventional form in group 1(SAFC). Group 2(TE) showed distinct hybrid layer and resin tags penetrating dentinal tubules with discrete areas of silver uptake. Group 3(SE) showed distinct uniform hybrid layer with absence of visible silver deposits. Group 4(GI) showed absence of distinct hybrid layer and presence of abundant silver deposits. There was strong, positive correlation between penetration of the silver and leakage, which was statistically significant.
Conclusions: Nanoleakage quantified by EDX and examined by SEM was least in SE, followed by TE, SAFC then GI