Journal of Dental Research, Vol 55, 411-418, Copyright © 1976 by International & American Associations for Dental Research Online Journals
Adhesion of orthodontic cements to human enamel
J. B. Moser, D. B. Dowling, E. H. Greener and G. W. Marshall
The tensile bonding characteristics of five orthodontic cements to etched
human enamel with and without a silane primer after storage for 1, 7, and
30 days in artificial saliva at 37 C were compared. The scatter of the data
was probably due to the wide variation of surface morphology of etched
human enamel. Cement L, a composite resin cement, was significantly
stronger than the other cements tested. Cement D, a polycarboxylate cement,
was significantly the weakest cement tested. Cements U, O, and N-B were of
relatively equal bond strengths. Of the direct-bonding systems commercially
available, the N-B system had the fastest setting time. The silane primer
used in the research decreased the bond strength of cement O; however, it
significantly increased the bond strength of cement L. Storage in
artificial saliva at 37 C for 30 days decreased the mean bond strengths of
most of the orthodontic cements with and without a silane primer. The
exceptions were cement N-B without a silane primer and cements O and D with
silane primer.
