Συσχέτιση του σχήματος του κρανιοπροσωπικού συμπλέγματος με το λόγο του μήκους των δακτύλων (2Δ:4Δ) σε παιδιά προεφηβικής ηλικίας

Postgraduate Thesis uoadl:1315367 589 Read counter

Unit:
Κατεύθυνση Ορθοδοντική (Κλινικές Ειδικεύσεις)
Βιβλιοθήκη Οδοντιατρικής
Deposit date:
2014-07-17
Year:
2013
Author:
Βαλλά Καλλιόπη
Supervisors info:
Δημήτριος Χαλαζωνίτης Αν.Καθηγητής , Μαργαρίτα Μάκου Καθηγήτρια, Ηλίας Μπιτσάνης Επίκ. Καθηγητής
Original Title:
Συσχέτιση του σχήματος του κρανιοπροσωπικού συμπλέγματος με το λόγο του μήκους των δακτύλων (2Δ:4Δ) σε παιδιά προεφηβικής ηλικίας
Languages:
English
Translated title:
Correlation of 2nd to 4th digit ratio (2D:4D) and craniofacial shape in prepubertal children
Summary:
The 2D:4D digit ratio may reflect fetal sex-hormone levels, potentially showing
covariation with craniofacial skeleton shape. We studied this correlation in a
group of 58 male and 59 female prepubertal children, aged 7 to 12 years, using
geometric morphometric analysis. Fingers were measured with a computer-assisted
procedure that involved tracing the finger outline by the user, and subsequent
automatic calculation of the finger long axis and length by the computer. This
method reduced errors of measurement to one third or less of previously
reported values. Craniofacial shape was evaluated using 15 skeletal landmarks
on lateral cephalometric radiographs. Procrustes alignment and principal
components analysis was applied to the craniofacial landmarks and multivariate
regression between digit ratios and craniofacial shape was computed in shape
space and form space. The male 2D:4D ratio was smaller than the female ratio
(Cohen’s d: 0.275 left hand, 0.126 right hand), but the difference was not
statistically significant. Craniofacial shape did not show sexual dimorphism,
but males were larger than females. No correlation was found between digit
ratio and craniofacial shape, either for the whole sample or for any of the two
sex groups.
Keywords:
geometric morphometrics, covariation, cephalometric radiograph, computer-assisted measurements
Index:
No
Number of index pages:
0
Contains images:
Yes
Number of references:
95
Number of pages:
68
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