Abnormalities of Teeth qxd

Slide 7:  congenitally missing 

bicuspid

Slide 10:  ectodermal dysplasia

Slide 11:  microdontia or "peg 

lateral"

Slide 8:  oligodontia

Slide 9:  ectodermal dysplasia

"Abnormalities of Teeth"

– 2 –

Charles Dunlap, DDS

Sept. 2004

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"Abnormalities of Teeth"

– 3 –

Charles Dunlap, DDS

Sept. 2004

Taurodontism 

A morphologic abnormality of teeth called taurodontism (bull teeth) is seen in slide #12. Slide #13 is a normal cynodont

for comparison. Slide #14 is also a taurodont. This condition is most conspicuous in the molar teeth. The distance from

the roof of the pulp chamber to the root bifurcation is greatly increased. Variants include hypotaurodontism, mesotau-

rodontism  and hypertaurodontism. Cases illustrated here are hypertaurodonts. This conditions may exist as an isolated

trait (autosomal dominant) or as part of several syndromes including the trichodentoosseous syndrome (TDO), otodental

dysplasia, ectodermal dysplasia, tooth and nail syndrome, amelogenesis imperfecta and others. (Am. J. Med. Genetics

11; 435-442  1982 April). Visit OMIM for more.