|Classification and external resources|
Supernumerary roots is a condition found in teeth there may be a larger number of roots than expected. The most common teeth affected are mandibular (lower) canines, premolars, and molars, especially third molars. Canines and most premolars, except for maxillary (upper) first premolars, usually have one root. Maxillary first premolars and mandibular molars usually have two roots. Maxillary molars usually have three roots. When an extra root is found on any of these teeth, the root is described as a supernumerary root. The clinical significance of this condition is associated with dentistry when accurate information regarding root canal anatomy is required when root canal treatment is required 
- Olga A.C.Ibsen, Joan Andersen Phelan . Oral Pathology for the Dental Hygienist - Pageburst E-Book on Kno6: Oral Pathology for the Dental Hygienist - Pageburst E-Book on Kno. Elsevier Health Sciences. pp. 170–. ISBN 978-1-4557-7511-8.
- Mohammadi Z, Jafarzadeh H, Shalavi S, Bandi S, Patil S (April 2015). "Root and Root Canal Morphology of Human Third Molar Teeth". J Contemp Dent Pract. 16 (4): 310–3. PMID 26067735.
- Kahn, Michael A. Basic Oral and Maxillofacial Pathology. Volume 1. 2001.
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