|Classification and external resources|
Taurodontism is a condition found in the molar teeth of humans whereby the body of the tooth and pulp chamber is enlarged vertically at the expense of the roots. As a result, the floor of the pulp and the furcation of the tooth is moved apically down the root. The underlying mechanism of taurodontism is the failure or late invagination of Hertwig's epithelial root sheath, which is responsible for root formation and shaping causing an apical shift of the root furcation.
The constriction at the amelocemental junction is usually reduced or absent. Taurodontism is most commonly found in permanent dentition although the term is traditionally applied to molar teeth. In some cases taurodontism seems to follow an autosomal dominant type of inheritance.
Taurodontism is found in association with amelogenesis imperfecta, ectodermal dysplasia and tricho-dento-osseous syndrome. The term means "bull like" teeth derived from similarity of these teeth to those of ungulate or cud-chewing animals.
According to Shaw these can be classified as hypotaurodont, hypertaurodont and mesotaurodont.
According to Mangion taurodontism may be:
- A (mentally retarded) character
- A primitive pattern
- Mendelian recessive character
- Atavistic feature
- A mutation
It has also been reported in Klinefelter's syndrome, XXYY and Down's syndrome . The teeth involved are invariably molars, sometimes single and at the other times multiple teeth may be involved. The teeth themselves may look normal and do not have any particular anatomical character on clinical examination.
On a dental radiograph, the involved tooth looks rectangular in shape without apical taper. The pulp chamber is extremely large and the furcations may be only a few millimeters long at times.
- Yang, Jie; Wang, Shih-Kai; Choi, Murim; Reid, Bryan M.; Hu, Yuanyuan; Lee, Yuan-Ling; Herzog, Curtis R.; Kim-Berman, Hera; Lee, Moses (2015-01-01). "Taurodontism, variations in tooth number, and misshapened crowns in Wnt10a null mice and human kindreds". Molecular Genetics & Genomic Medicine. 3 (1): 40–58. ISSN 2324-9269. PMC . PMID 25629078. doi:10.1002/mgg3.111.
- "Thames & Hudson Publishers | Essential illustrated art books | The Neanderthals Rediscovered | How Modern Science is Rewriting Their Story". www.thamesandhudson.com. Retrieved 2015-12-25.
- Irish, J.D. & Scott, G.R. (2016). A Companion to Dental Anthropology. Wiley Blackwell. Page 197. Retrieved January 14, 2017, from link.
- Saukko, P. & Knight, B. (2004). Knight's Forensic Pathology (3rd ed.). USA: Taylor & Francis Group. Page 534. Retrieved January 14, 2017, from link.
- Kahn, Michael A. Basic Oral and Maxillofacial Pathology. Volume 1. 2001.
- Richard R. Welbury Pediatric Dentistry 3rd Edition 2005