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Root canal configuration of the mandibular first premolar

  • Author Footnotes
    1 Dr. Baisden is staff endodontist, Fort Knox, KY
    Michael K. Baisden
    Footnotes
    1 Dr. Baisden is staff endodontist, Fort Knox, KY
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  • Author Footnotes
    2 Dr. Kulild is director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
    James C. Kulild
    Correspondence
    Address requests for reprints to COL James C. Kulild, U.S. Army Dental Activity, Fort Gordon, GA 30905-5660.
    Footnotes
    2 Dr. Kulild is director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
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  • Author Footnotes
    3 Dr. Weller is former director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
    R. Norman Weller
    Footnotes
    3 Dr. Weller is former director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
    Search for articles by this author
  • Author Footnotes
    1 Dr. Baisden is staff endodontist, Fort Knox, KY
    2 Dr. Kulild is director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
    3 Dr. Weller is former director, endodontic residency program, U.S. Army Postgraduate Program, U.S. Army Dental Activity, Fort Gordon, GA.
      This paper is only available as a PDF. To read, Please Download here.
      One hundred six human mandibular left and right first premolars, previously extracted due to nonrestorable caries, periodontal disease, or orthodontic reasons, were sectioned perpendicular to the long axis of the root starting at the cementoenamel junction. Three-millimeter sections were made with an ultrathin separating disc to the level of the anatomical apex. After 1 day in 5.25% NaOCI, each section was rinsed in phosphate-buffered saline, evaluated with a stereomicroscope, and photographed. The slides were projected and the shape of the canal, incidence of multiple canals, level of bifurcation, and any other variant anatomy were recorded.
      Seventy-six percent of the premolars demonstrated Type I canals and 24% contained Type IV. The shape of the canals was predominantly oval or round. An interesting finding was the number of C-shaped canals which were associated predominantly with Type IV canal systems. This occurred in 14% of the roots.
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