Journal of Endodontics
Volume 7, Issue 2 , Pages 61-65, February 1981

The influence of master cone adaptation on the quality of the apical seal

  • David A. Allison, DMD

      Affiliations

    • Dr. Allison, formerly a dental student at the Medical College of Georgia School of Dentistry, is now a resident in endodontics at Boston University
    • ,
  • Robert J. Michelich, DDS

      Affiliations

    • Dr. Michelich is assistant professor and director of postgraduate endodontics
    • Corresponding Author InformationRequests for reprints should be directed to Dr. Michelich.
    • ,
  • Richard E. Walton, DMD

      Affiliations

    • Dr. Walton is professor and chairman, department of endodontics, Medical College of Georgia School of Dentistry, Augusta, Ga 30912

This study sought to evaluate how the adaptation of the master cone affected the apical seal. Canals were enlarged to standardized or step-back flared tapers, and master cones were fitted to accepted visual and tactile standards. Cone adaptation was examined by radiographs and classified as adapted or nonadapted. Obturated specimens were immersed in 45 Ca solution, and microleakage was detected with autoradiographs. There was no statistical difference in extensive microleakage in canals obturated with adapted or nonadapted master cones. The results showed that radiographic criteria for adapting master cones were more rigorous than visual and tactile criteria and that adaptation of the master cone to precise radiographic criteria is not required to establish a fluid-tight apical seal.

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 The authors thank Dr. Carl Fairhurst for his assistance in research design, Dr. Kenneth Hawkins for technical advice, and Ms. Darnell Beard for preparing the manuscript.

PII: S0099-2399(81)80243-9

doi:10.1016/S0099-2399(81)80243-9

Journal of Endodontics
Volume 7, Issue 2 , Pages 61-65, February 1981

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