The effect of bonding agents on the microleakage and bond strength of sealant in primary teeth

Abstract

This in vitro study investigated the effect of use of three dentine bonding agents: Scotchbond Multi-Purpose Plus (3M Dental Products, St. Paul, Minnesota, U.S.A.), Syntac (Vivadent, Schaan, Liechtenstein), Optibond Dual Cure (Kerr, Romulus, MI, U.S.A.) on microleakage and shear bond strength of a fissure sealant (Helioseal F, Vivadent, Schaan, Liechtenstein) bonded to either dry or wet (saliva contaminated) enamels of primary teeth. Newly extracted 112 non-carious primary teeth were sectioned and embedded in resin blocks. Eight groups were formed for each test. Each group consisted of 14 specimens. Group 1 and 2: fissure sealant was applied directly to etched enamel in dry and wet condition, respectively; Group 3 and 4: fissure sealant was applied onto etched and Scotch-bond Multi-Purpose Plus treated enamel in dry and wet condition, respectively; Group 5 and 6: fissure sealant was applied onto etched and Syntac treated enamel in dry and wet condition, respectively; Group 7 and 8: fissure sealant was applied onto etched and Optibond Dual Cure treated enamel in dry and wet condition, respectively. The results revealed that the use of an enamel-dentine bonding agent under fissure sealant increased the bond strength and decreased the microleakage. The use of enamel-dentine bonding agents under sealant in moisture contaminated conditions gave better results than applying sealant alone onto non-contaminated teeth. Finally, Scotchbond Multi-Purpose Plus yielded the best results for both tests.

Bonding agent underneath sealant: shear bond strength to oil-contaminated

“…Over the last decades, the application of an intermediate bonding agent layer underneath the sealant has been widely suggested. The findings of several studies (4,6,(14)(15)(16)(17) have shown that the use of adhesive systems along with resin sealants may improve bonding to etched enamel under dry and contamination conditions. It is likely that solvents, such as ethanol and acetone, present in the currently available single-bottle adhesives are able to remove any residual moisture from the etched enamel, carrying the resin monomers into close adaptation with the surface (15,18).…”

Use of a self-etching adhesive on previously etched intact enamel and its effect on sealant microleakage and tag formation

“…[5][6][7][8] However, technique errors and moisture contamination are still the major reason for sealant failure. [9][10][11][12][13][14] Sealing partially erupted molar teeth is a demanding procedure and in most cases is carried out using cotton roll isolation. Even if the contamination of the etched surfaces is not apparent, the sealant application under high relative humidity exhibited a significant reduction in its bond strength.…”

Effects of mechanical and thermal aging on microleakage of different fissure sealants

“…It has been suggested that a bonding agent be placed before the sealant was applied, although there are many detractors to this application technique [5][6][7] . In some studies, it was said that application of bonding agent before fissure sealant increased the latter's effectiveness [8][9][10] . The study of Koyuturk et al 11) showed that application of bonding agent prior to application of fissure sealant yielded beneficial results in terms of microleakage.…”