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Trabecular Bone Microarchitecture Evaluation in an Osteoporosis Mouse Model
Published on: September 8, 2023
Three-dimensional microarchitecture of adolescent cancellous bone
Ming Ding1, Carl Christian Danielsen, Ivan Hvid
1Orthopaedic Research Laboratory, Department of Orthopaedics & Traumatology, Odense University Hospital, Institute of Clinical Research, University of Southern Denmark, 5000 Odense C, Denmark. ming.ding@ouh.regionsyddanmark.dk
Bone
|August 14, 2012
Summary
Adolescent bone shares structural similarities with adult bone but has lower density and mineral content. Despite these differences, mechanical properties remain comparable, indicating robust bone development during adolescence.
Area of Science:
- Orthopedics
- Biomedical Engineering
- Bone Biology
Background:
- Subchondral bone undergoes adaptations during growth and aging.
- Understanding adolescent bone properties is crucial for comprehending skeletal development.
Purpose of the Study:
- To compare microarchitectural, mechanical, collagen, and mineral properties of adolescent cancellous bone with adult and aging bone.
- To gain insight into subchondral bone adaptations during growth.
Main Methods:
- Harvested 23 human proximal tibiae from adolescents (9-17 yrs), young adults (18-24 yrs), and adults (25-30 yrs).
- Prepared 8x8x8 mm³ cancellous bone samples and performed micro-CT scanning.
- Conducted compression testing and determined collagen and mineral content.
Main Results:
- Adolescent bone showed similar bone volume fraction, structure type, and connectivity to adult bone.
- Adolescent bone exhibited lower bone surface density, higher collagen concentration, greater trabecular separation, and lower tissue/mineral density compared to adults.
- Mechanical properties like ultimate stress and failure energy were not significantly different, though Young's modulus was lower in adolescents.
Conclusions:
- Adolescent cancellous bone possesses comparable structural integrity and mechanical function to adult bone.
- Differences in density and composition exist, with adolescents having lower mineral and higher collagen content.
- Apparent density is a key predictor of mechanical properties in cancellous bone across age groups.
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