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December 26, 1925

The Anatomy of the Root-Canals of the Teeth of the Permanent Dentition.

JAMA. 1925;85(26):2052. doi:10.1001/jama.1925.02670260050031

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The authors have divided their book into two main parts, the first dealing with the anatomy of the root-canals of the permanent teeth. The first author gives a thorough review of the previous literature concerning the subject and then describes in detail the technic used in his own researches. Each tooth of the permanent set is given a separate chapter in which the minute anatomy of its root-canal is described, with a tabulation of the number of teeth examined, the number of canals found, the apical ramifications, the marrow canals, and the average percentage of each. In making this study the author has examined 2,800 teeth in persons ranging in age from 5 to 55 years. This part of the book is profusely illustrated, and credit should be given the publishers for their careful treatment of the illustrations. In the second part, the anatomy of the root-canals of the deciduous

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