Journal of Dental Research, Vol 72, 582-586, Copyright © 1993 by International & American Associations for Dental Research Online Journals

ARTICLES

Modified surface-active monomers for adhesive bonding to dentin

S. Venz and B. Dickens
American Dental Association Health Foundation, Paffenbarger Research Center, Gaithersburg, Maryland.

PMGDM, a PMDM-type adhesive monomer, was synthesized from pyromellitic dianhydride and glycerol dimethacrylate. Only the para isomer of PMDM, a solid, is used in dental adhesives. The adhesive monomer PMGDM is a liquid and consists of a mixture of para- and meta isomers. This study shows that PMGDM has several advantages over PMDM. For example, the adhesive can be applied at a greater thickness, and additives and/or additional initiators for improved curing can be incorporated. Use of the liquid monomer PMGDM also provided a convenient means of varying the thickness of the adhesive layer between dentin and composite. The adhesive bonds were tested in both shear and tensile modes. PMDM was used as the control. The reliability of the bonds, as judged from the Weibull modulus and Weibull characteristic strength, was improved by (1) use of more concentrated solutions of PMGDM adhesive, (2) use of an adhesive thickness of about 25 microns, and (3) modification of PMGDM with a diluent monomer which is expected to enhance the degree of cure and/or the dentin-wetting properties of the adhesive resin.

This article has been cited by other articles:

				G. E. Schumacher, J. M. Antonucci, J. N.R. O'Donnell, and D. Skrtic The use of amorphous calcium phosphate composites as bioactive basing materials: Their effect on the strength of the composite/adhesive/dentin bond J Am Dent Assoc, November 1, 2007; 138(11): 1476 - 1484. [Abstract] [Full Text] [PDF]