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Original Articles

The prevalence and mode of inheritance of Carabelli trait in the Sinhalese

Authors:

Upul Dissanayake ,

University of Peradeniya, LK
About Upul
Division of General Pathology, Faculty of Dental Sciences
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M. S. Chandrasekera,

University of Peradeniya, LK
About M. S.
Department of Anatomy Faculty of Medicine
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E. R. Wikramanayake

University of Peradeniya, LK
About E. R.
Emeritus Professor
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Abstract

The prevalence and mode of inheritance of Carabelli trait has been studied in 1040 Sinhalese (561 males and 479 females, age range 20 to 30 yrs). Carabelli trait is one of the more common dental traits occurring most frequently on the mesio-lingual cusp of the first upper permanent molars. The trait when present is categorized as pit, groove, cusp without free tip or well developed cusp. The prevalence of Carabelli trait in the Sinhalese was compared with that reported for other population groups. Fifteen subjects who had well developed bilateral Carabelli cusps were randomly selected as probands for construction of pedigrees. The mode of inheritance was assessed by the frequency distribution of the trait among individuals in the pedigrees using the simple counting method. The most probable mode of inheritance was determined using different models of inheritance. The prevalence of Carabelli trait in the Sinhalese is 38%. The trait is inherited autosomal dominant.

How to Cite: Dissanayake, U., Chandrasekera, M.S. & Wikramanayake, E.R., (2004). The prevalence and mode of inheritance of Carabelli trait in the Sinhalese. Ceylon Journal of Medical Science. 47(1), pp.7–15. DOI: http://doi.org/10.4038/cjms.v47i1.4846
Published on 30 Jun 2004.
Peer Reviewed

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