An adhesive for sealing of composite resins: an in vivo and in vitro investigation
Kun, William B.
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The ability of an adhesive sealant to eliminate microleakage and enhance the esthetic quality of Class V composite resin restorations was investigated. In order to determine the adhesive properties of the sealant in vivo, 57 permanent teeth were restored with co11111ercially available composite resins and covered with a thin layer of the sealant, extending 1\-2 mm on surrounding conditioned enamel. Clinical assessments were conducted over a period of 12 months and were supplemented with scanning electron micrographs from in vivo obtained replicas. After one year it was observed that 78.4 percent of the original specimens were totally covered with the sealant. In vitro experimentation revealed that basic fuchsin dye did not penetrate the adhesive layer and that the sealant was successful in eliminating microleakage after having been exposed to the oral environment for one year. Those composite restorations which received no adhesive layer displayed marked marginal leakage as evidenced by penetration of the dye beyond the dentoeriamel junction and directed along the dentinal tubules. Scanning electron micrographs demonstrated the intimate relationships between adhesive and enamel as well as that of adhesive and restoration. Mechanical retention derived from penetration of the adhesive into pores on the conditioned enamel surface and interlocking of the sealant with exposed filler particles of the composite contributed to the adhesive properties.
PLEASE NOTE: This work is protected by copyright. Downloading is restricted to the BU community: please click Download and log in with a valid BU account to access. If you are the author of this work and would like to make it publicly available, please contact firstname.lastname@example.org.Thesis (M.Sc.D.)--Boston University School of Graduate Dentistry, 1973. Pedodontics.Bibliography included.
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