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Related Experiment Videos

Densitometric study of developing femur

G L Panattoni1, P D'Amelio, M Di Stefano

  • 1Department of Anatomy, Pharmacology and Forensic Medicine, University of Turin, Turin, Italy.

Calcified Tissue International
|January 23, 1999
PubMed
Summary
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Human fetal long bone ossification shows high correlation between bone mineral content and conceptual age. Bone mineral density shows variability, especially in the third trimester.

Area of Science:

  • Human Osteology
  • Prenatal Development
  • Skeletal Biology

Background:

  • Ossification patterns in the human fetal skeleton are crucial for understanding skeletal development.
  • Previous studies have quantitatively assessed spinal ossification; this study extends this to long bones.

Purpose of the Study:

  • To quantitatively assess the ossification of human fetal long bones (femora) in relation to conceptual age.
  • To analyze the spatio-temporal ossification rates using a quantitative methodological approach.

Main Methods:

  • Postero-anterior scans of 29 dried fetal femora (11.5 weeks to term) using a Hologic QDR 1000 X-ray densitometer.
  • Measurement of bone mineral content (BMC) and bone mineral density (BMD) of the femoral shaft.
  • Analysis of BMD gradients along the longitudinal axis of the shaft.

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Main Results:

  • Bone mineral content (BMC) strongly correlates with conceptual age throughout prenatal life (r >= 0.96), particularly in the third trimester.
  • Bone mineral density (BMD) shows a decreasing correlation with conceptual age during development (r=0.95 to 0.68).
  • A bidirectional gradient in BMD from the middle to proximal and distal ends of the femoral shaft was observed.

Conclusions:

  • Findings confirm previous studies on spinal ossification and highlight BMC's strong relationship with conceptual age.
  • Individual variability in bone density at term, especially in the spongiosa, is suggested.
  • The study provides insights into the morphogenesis of long bones through spatio-temporal ossification analysis.