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Updated: Jul 15, 2026

Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
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Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model

Published on: September 8, 2023

Bone mass, bone strength, and their relationship in developing CD-1 mice.

Wendy E Ward1, Ana V Piekarz, Debbie Fonseca

  • 1Department of Nutritional Sciences, Faculty of Medicine, University of Toronto, Toronto, Canada. wendy.ward@utotonto.ca

Canadian Journal of Physiology and Pharmacology
|May 10, 2007
PubMed
Summary

Optimizing nutrition during early development is key for preventing osteoporosis. Bone mass accumulation primarily occurs in the first three months, while bone strength develops later, highlighting the importance of pubertal nutrition.

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Area of Science:

  • Developmental biology
  • Orthopedics
  • Nutritional science

Background:

  • Osteoporosis prevention strategies can be optimized through nutritional interventions during development.
  • The CD-1 mouse model is frequently utilized for studying nutritional impacts on bone health.

Purpose of the Study:

  • To investigate bone development in male and female CD-1 mice during the first four months of life.
  • To assess bone mass (bone mineral content and bone mineral density) and biomechanical strength (peak load).

Main Methods:

  • Longitudinal assessment of bone outcomes at monthly intervals from 1 to 4 months of age.
  • Measurement of femur and spine bone mineral content (BMC) and bone mineral density (BMD).
  • Evaluation of peak load as a measure of bone strength at different skeletal sites.

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Main Results:

  • Bone mineral content and bone mineral density in the femur and spine plateaued between 3 and 4 months of age.
  • Peak load, a key indicator of bone strength, exhibited site-specific changes over the 4-month period.
  • Femur bone mineral content significantly predicted peak load at both the femur midpoint and neck.

Conclusions:

  • Bone mass accumulation is largely completed within the first three months of life in CD-1 mice.
  • Peak bone strength development continues beyond the initial bone mass accrual phase.
  • Nutritional interventions targeting peak bone mass optimization for osteoporosis prevention may be most impactful during the pubertal growth period.