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Contemporary Endodontic Retreatments: An Analysis based on Clinical Treatment Findings

  • Michael M. Hoen
    Correspondence
    Address requests for reprints to Dr. Michael Hoen, University of Detroit Mercy School of Dentistry, Endodontic Department, 8200 West Outer Drive, P.O. Box 19900, Detroit, MI 48219-0900
    Affiliations
    Dr. Hoen is associate professor and director, Graduate Endodontic Program, University of Detroit Mercy; his clinical practice is with Endodontic Associates in Bloomfield Hills, MI. Dr. Pink is professor and associate dean of Graduate Education and Research, Course Director Biostatistics & Research Design, University of Detroit Mercy School of Dentistry, Detroit, MI.
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  • Frank E. Pink
    Affiliations
    Dr. Hoen is associate professor and director, Graduate Endodontic Program, University of Detroit Mercy; his clinical practice is with Endodontic Associates in Bloomfield Hills, MI. Dr. Pink is professor and associate dean of Graduate Education and Research, Course Director Biostatistics & Research Design, University of Detroit Mercy School of Dentistry, Detroit, MI.
    Search for articles by this author
      A prospective in vivo investigation was conducted to determine radiographic and clinical factors associated with contemporary nonsurgical endodontic retreatments. Approximately 1100 failing endodontically treated teeth were screened to determine an appropriate treatment plan. Using magnification, 337 consecutive retreatment cases were evaluated and treated. The vast majority of the retreated cases involved multiple factors. Eighty-five percent of the cases presented with periradicular radiolucencies. Sixty-five percent of the cases demonstrated poor radiographic obturation quality. Associated pain was noted 51% of the time. Forty-two percent of the teeth had untreated canal space. It was statistically significant (Chi-square, p ≤ 0.05) that additional canal space was located and treated in 89% of the cases that had previous radiographic asymmetrical obturations. Evidence of coronal leakage was noted in 13% of the retreated teeth. Tooth number, obturation materials, overfills, and previous surgical retrofillings were also recorded. Recommendations were made that might improve the rate of clinical success.
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