- International Journal of Dental Anthropology
- No. 7. Published in July 2005
- ISSN 0124-7336
- Copyright © 2005 Syllaba Press
A preliminary three - Generation
Analysis of Permanent Lower Tooth Size.
Lagravère M.O, Bernabé E & Flores-Mir
C.
Inter. J. Dental Anthropol. 7: 17-24 (2005)
Abstract: The aims of the present
study were to compare morphometrically the mesiodistal (MD) tooth size
of the permanent lower incisors between family members of the first (grandparents),
second (parents) and third (siblings) generation and to determine the
association between the permanent lower incisors MD tooth size of the
three evaluated generations. Model casts of the lower incisors were
taken from members of sixteen families. Measurements were made with a
digital sliding caliper to the nearest 0.01mm. One hundred and twenty
trios of measurements were obtained including a child, parent and
grandparent. Descriptive statistics, a MANOVA test, and a Pearson
correlation test were calculated. For the permanent lower central
incisor, MD tooth size increased in 0.25 mm (4.79 %) from the first (grandparents)
to the second (parents) generation and 0.23 mm (4.20 %) from the second
(parents) to the third (siblings) generation. Similarly, for the
permanent lower lateral incisor, MD tooth size increased in 0.16 mm
(2.72 %) from the first to the second generations and in 0.14 mm (2.28
%) from the second to the third generations. Different correlations were
obtained between the third and second generation (central incisor r=
0.07; lateral incisor r=0.41), between the first and second generation
(central incisor r= 0.19; lateral incisor r=0.18) and between the third
and first generation (central incisor r= 0.37; lateral incisor r=0.54).
The correlations obtained show a mild genetic influence in the
morphometric heredity of MD tooth width. A larger sample may be required
to validate these preliminary results.
Keywords: Lower incisor, Tooth size, Family analysis, Perú.
Resumen: El objetivo de este estudio fue comparar
morfométricamente el diámetro mesiodistal de incisivos inferiores
permanentes entre miembros de una familia de 1ra (abuelos), segunda
(padres, y tercera (hijos) generación y determinar la asociación entre
el tamaño mesiodistal de los incisivos inferiores permanentes en las
tres generaciones examinadas. Se tomaron los modelos en yeso de los
miembros de seis familias. Las medidas fueron tomadas con un calibrador
digital de 0,01 mm de error. Ciento veinte tríos de medidas fueron
obtenidos, incluyendo niños, padres y abuelos. Estadística descriptiva,
test de MANOVA y correlación de Pearson fueron calculados. Las
correlaciones obtenidas demuestran poca influencia genética en la
herencia del diámetro mesio-distal. Como conclusión se postula que se
puede requerir una muestra más grande para validar estos resultados
preliminares.
Palabras clave: Incisivos inferiores, Tamaño dental, Análisis
familiar, Perú.
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