Abstract
Objectives: Leakage around retrograde fillings is an important cause of endodontic surgery. This
in vitro study sought to compare the following: (1) methylene blue dye leakage linked
to retrofillings in human and sheep teeth with the degree of dye penetration when
intermediate restorative materials and Chemfil were used as retrofillings, (2) the
apical microleakage in filled with that in unfilled root canals, and (3) 2 storage
techniques, incubator-based and subcutaneous implantation in rats. Study Design: Tested were 198 human and 196 sheep teeth that were retrofilled with intermediate
restorative material or Chemfil, then stored in an incubator or subcutaneously in
rats for 10, 20, and 30 days before immersion in methylene blue dye for 24 hours.
Linear dye penetration was evaluated, and the results were statistically analyzed
by means of analysis of variance. Results: Leakage between sheep and human teeth was significantly different (P <.05). Chemfil had significantly less leakage than intermediate restorative material
after storage in rat (P <.05) for up to 20 days, but not after 30 days. No differences were found between
leakage of unfilled and filled human root canal teeth. Conclusions: The sheep incisor is a poor experimental model of the human tooth, and both aging
procedures demonstrate extensive leakage of retrofilling materials after long-term
storage. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2002;93:81-7)
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Article info
Publication history
Accepted:
May 23,
2001
Received in revised form:
March 15,
2001
Received:
January 31,
2001
Footnotes
*Reprint requests: Dominique Roux, DDS, PhD, U.F.R. d'Odontologie, Laboratoire de Physiologie Oro-Faciale, 11, Bd Charles de Gaulle, 63000 Clermont-Ferrand, France,[email protected]
Identification
Copyright
© 2002 Mosby, Inc. Published by Elsevier Inc. All rights reserved.
