TY - JOUR
T1 - Directionality of dental trait frequency between human second deciduous and first permanent molars
AU - Smith, Patricia
AU - Koyoumdjisky-Kaye, Edith
AU - Kalderon, W.
AU - Stern, D.
PY - 1987
Y1 - 1987
N2 - Dental traits were scored for second deciduous molars (dm2) and first permanent molars (M1) on casts of the dental arches of children aged 7-11 years. The children were from four different ethnic groups. The overall frequency of traits differed between the groups but the relative frequency of expression of traits in the two teeth showed a similar pattern. Traits such as continuous oblique ridge, Carabelli cusp, Y pattern and 7th cusp, that appear in the early stages of development, were more frequent in dm2 than in M1. Wrinkling, occlusal tubercles and marginal ridge cusps were more frequent in M1; these appear later. Thus the relative frequency of traits in these teeth reflects their ontogenetic history.
AB - Dental traits were scored for second deciduous molars (dm2) and first permanent molars (M1) on casts of the dental arches of children aged 7-11 years. The children were from four different ethnic groups. The overall frequency of traits differed between the groups but the relative frequency of expression of traits in the two teeth showed a similar pattern. Traits such as continuous oblique ridge, Carabelli cusp, Y pattern and 7th cusp, that appear in the early stages of development, were more frequent in dm2 than in M1. Wrinkling, occlusal tubercles and marginal ridge cusps were more frequent in M1; these appear later. Thus the relative frequency of traits in these teeth reflects their ontogenetic history.
UR - http://www.scopus.com/inward/record.url?scp=0023077515&partnerID=8YFLogxK
U2 - 10.1016/0003-9969(87)90146-4
DO - 10.1016/0003-9969(87)90146-4
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C2 - 3479074
AN - SCOPUS:0023077515
SN - 0003-9969
VL - 32
SP - 5
EP - 9
JO - Archives of Oral Biology
JF - Archives of Oral Biology
IS - 1
ER -