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  • Title: C-shaped maxillary permanent first molar: a case report and literature review.
    Author: Martins JN, Quaresma S, Quaresma MC, Frisbie-Teel J.
    Journal: J Endod; 2013 Dec; 39(12):1649-53. PubMed ID: 24238466.
    Abstract:
    INTRODUCTION: The C-shaped configuration is rare in the upper first molar.The purpose of this article is to present 2 cases diagnosed during endodontic therapy and perform a literature review of this anatomy in the upper first molar. METHODS: Endodontic therapy was performed by using a dental operating microscope and a cone-beam computed tomography analysis for better understanding of this anatomy. A literature search was conducted to identify and compare all the published cases of C-shaped upper first molar. RESULTS: Before the cases reported in this article, only 5 cases were available in the published literature. Three different types of C-shaped configurations in the upper first molar have been presented. CONCLUSIONS: The C-shaped maxillary first molar is a rare anatomic configuration. The use of the dental operating microscope may help in the endodontic therapy of these cases. Three types of C-shaped configurations have been reported; the fusion of the distobuccal root with the palatal root appears to be the most usual one.
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