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VOLUME 2 , ISSUE 3 ( July-September, 2011 ) > List of Articles


Bilateral Six Cusped and Three Rooted Mandibular First Molars

Karthik Venkataraghavan, P Praveen, A Anantharaj, S Prathibha Rani, Murali B Krishnan

Citation Information : Venkataraghavan K, Praveen P, Anantharaj A, Prathibha Rani S, Krishnan MB. Bilateral Six Cusped and Three Rooted Mandibular First Molars. World J Dent 2011; 2 (3):255-258.

DOI: 10.5005/jp-journals-10015-1092

Published Online: 01-09-2011

Copyright Statement:  Copyright © 2011; The Author(s).


Teeth are vertebrate organs that arise from complex and progressive interactions between an ectoderm, the oral epithelium and an underlying mesenchyme. A significant amount of research has focused on determining the processes that initiate tooth development. It is widely accepted that there is a factor (multiple signaling molecules, including BMPs, FGFs, Shh and Wnt proteins) within the tissues of the first branchial arch that is necessary for the development of teeth. A 9-year-old reported to our department with the chief complaint of pain in the lower right back teeth region. On clinical examination, mandibular molars revealed the presence of an extra cusp on the lingual surface. Occurrence of six cusps in permanent mandibular molar is a rare phenomenon, and number of cases reported is very few.

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  1. The Aleut dentition. Cambridge: Harvard University Press 1957.
  2. Tooth morphology as a basis for distinguishing monozygotic and dizygotic twins. Swed Med Res Counc 1962;34-43.
  3. Shovel-shaped teeth. Am J Phys Anthropol 1920;3:429-66.
  4. Further studies of tooth morphology. Am J Phys Anthropol 1921;4:141-76.
  5. The dentition of the American Indian. In: Laughlin WS (Ed). Dental anthropology. Papers on the physical anthropology of the American Indian. Fourth Viking Fund Summer Seminar. The Viking Fund Inc., New York 1951;138-76.
  6. Observations on the teeth of Chinese born and reared in China and America. Am J Phys Anthropol 1945;3:129-50.
  7. Genetic analysis of racial traits of the teeth. Cold Spring Harbor Symposia on Quantitative Biology, XV 1951;191-203.
  8. A comparison of the teeth of people: Indo-European racial stock with the Mongoloid. Dent Rec 1950;70:63-88.
  9. Genetic considerations in dental anthropology. Genetics and dental health. New York: Mc Graw Hill 1962;101-12.
  10. Variations in the frequency of shovel-shaped incisors in different populations. In: Brothwell DR (Ed). Dental Anthropology. Symposia of the Society for the Study of Human Biology. New York: Pergamon Press 1963;5.
  11. Dental morphology and population diversity. Hum Biol 1977;49:61-70.
  12. Genetics, dentition and taxomony. Univ Wyom Pub 1967;33:93-168.
  13. Molar cusps in Southern Chinese. The Open Anthropology Journal 2010;3:16-19.
  14. Characteristics of the occlusal surfaces of lower molars in a sample of the croatian population. Acta Stomat Croat 2003;69-73.
  15. Occlusal surface pattern of the lower molars and the second deciduous molar among the living Polynesians. American journal of physical anthropology 1973.
  16. The dentition of the Arctic peoples. Dissertation. Univ Wisconsin, Madison 1967.
  17. The Aymara of Western Bolivia: Occlusion, pathology, and characteristics of the dentition (III). J Dent Res 1978;57:459.
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