Abstract
A thorough understanding of internal and external anatomy of various teeth is critical for a successful outcome of endodontic therapy. The aims of this paper were (1) to describe the clinical retreatment of a maxillary second molar with two palatal roots and (2) to review the available literature regarding this anatomical variation. A 45-year-old Saudi female presented for non-surgical retreatment of maxillary left second molar. Careful radiographic and clinical examinations revealed the presence of two buccal and two palatal roots each with a single root canal. Anatomical variations can occur in any tooth; therefore, the clinicians should always anticipate the occurrence of these variations and utilize all the available tools to diagnose and manage them
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