Bone loss

Physiological

Gender

Male

Data Availability

42 to 104 months

Tissue

  • bone Changes

References

Referencing provided by LibAge

External Links

Description

In young mice the rapid growth is marked by substantial increase in bone size, mineral mass and mechanical properties. Maturation occurring between 12 and 42 weeks of age was characterized with the maintenance of bone mass and mechanical properties. From the peak levels, mice aged for 104 weeks exhibited decreased whole femur mass, percentage of mineralization diminished whole bone stiffness, energy to fracture and decreased cortical thickness. Periosteal perimeter and, consequently the cross-sectional moments of inertia continued to increase through 104 weeks, compensating for cortical thinning and increased brittleness due to decreased mineralization and stiffness. The shape of the mid-diaphysis became increasingly less elliptical in aged mice. After 52 weeks excessive endocortical resorption appeared, indicating a shift in normal mechanisms regulating bone shape and locating, suggestive of remodelling.