Toggle Main Menu Toggle Search

Open Access padlockePrints

Impregnation by dentine bonding agents into instrumented root-face dentine

Lookup NU author(s): Professor John Whitworth, Dr Robert Wassell


Full text for this publication is not currently held within this repository. Alternative links are provided below where available.


Objectives: To examine the penetration of unfilled resin into instrumented root-face dentine, facilitated by five commercially available dentine bonding agents. Methods: Upper third molar teeth were decoronated, and a given dentine bonding agent and resin composite applied to the instrumented root face, according to the manufacturer's instructions. A control specimen was similarly prepared but no dentine primer was applied prior to resin composite. The teeth were sectioned longitudinally and the sectioned surface demineralized and deproteinated. Specimens were examined by scanning electron microscopy (SEM) for resin tag length and density in different areas of the root face. Results: Specimens treated with dentine bonding agent systems exhibited minimum resin penetration of peripheral root-face dentine and much longer penetration of resin tags in dentine above the pulp chamber. A possible ‘hybrid’ layer of resin-impregnated dentine was observed in all specimens where a dentine bonding agent system had been used but was not observed in control specimens. Resin tags were also more sparsely observed in control specimens. Conclusion: Resin tag penetration is superior in both density and length of penetration in dentine overlying and adjacent to the pulp chamber, with shorter and sparser penetration exhibited in peripheral root-face dentine. The possible clinical implications of these observations are discussed.

Publication metadata

Author(s): Blair F, Whitworth J, Wassell RW

Publication type: Article

Publication status: Published

Journal: Journal of Dentistry

Year: 1995

Volume: 23

Issue: 5

Pages: 289-294

Print publication date: 01/10/1995

ISSN (print): 0300-5712

ISSN (electronic): 1879-176X

Publisher: Elsevier Ltd


DOI: 10.1016/0300-5712(94)00012-5


Altmetrics provided by Altmetric