Ontogeny of Size and Shape Sexual Dimorphism in the Pubis: A Multislice Computed Tomography Study by Geometric Morphometry

Abstract

Few studies have been conducted to determine sex differences in the immature coxal bone and the results were often contradictory. The authors studied sexual dimorphic differences of the pubis using geometric morphometric analysis of five osteometric landmarks recorded by multislice computed tomography (MSCT), based on three-dimensional reconstructions of 188 children (95 boys, 93 girls) living in the region of Toulouse, southwestern France, ranging in age from 1 to 18 years old. They used geometric morphometric methodology first to test sexual dimorphism in size (centroid size) and shape (Procrustes residuals) and second to examine patterns of shape change with age (development) and size change with age (growth). Based on statistical significance test results, the pubic shape became sexually dimorphic at 13 years old, although visible shape differences were observed as early as 9 years old. This work showed that the trajectories of pubis shape (development) and size (growth) differed throughout ontogeny and between sexes.

Developmental evidence for obstetric adaptation of the human female pelvis

“…2E and Table S1). These findings confirm previous studies on the early development of sexual dimorphism in pelvic substructures (7,(35)(36)(37). From the age of ∼10 y onward the female trajectory changes its direction substantially, whereas the male trajectory continues its earlier course (Figs.…”

Quantification of 3D curvature in the iliac crest: Ontogeny and implications for sex determination in juveniles

“…The onset, rate and patterning of indicators of sexual dimorphism need to be better understood across the context of the developing juvenile skeleton (e.g., Bilfeld et al, ; Cardoso & Saunders, ; Mays & Cox, ; Wilson et al, ). The interaction between age‐related shape change in the ilia and sex‐specific expressions of shape change is not understood, and has only recently been considered in the context of documenting shape trajectories during growth in the ilium (Wilson et al, ).…”

Interrelationships in the Variability of Root Canal Anatomy among the Permanent Teeth: A Full-Mouth Approach by Cone-Beam CT

“…In accordance with ethical and local radiation protection guidelines and the local board, no CBCT examinations were prescribed especially for the study; they were part of routine care. According to French law, the results of medical imaging examinations may be used retrospectively without the patient’s consent when these examinations have been carried out for clinical purposes and when they have been recorded anonymously (article 40–1, law 94–548 of 1 July 1994)[ 13 ].…”