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Bone Biomechanics
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Types of Bone
Bone consists of two forms: woven and lamella
Property | Woven Bone | Lamellar Bone |
---|---|---|
Definition | "Primitive", immature | "Mature" bone, remodelled from woven bone |
Found in | Embryo and new-born, in fracture callus, metaphyseal region of growing bone, tumours, osteogenesis imperfecta, and pagetic bone. | Throughout the mature skeleton in both cancellous trabecular and cortical bone. |
Composition | Dense coarse-fibred collagen, varied mineral content, greater turnover, more cells per unit volume with random arrangement, no lamellae. | Formed by intramembranous or endochondral ossification, contains collagen fibres. |
Organisation | Randomly arranged collagen fibres, disorganised | Highly ordered, stress-oriented collagen fibres |
Mechanical Properties | Isotropic | Anisotropic |
Strength | Weaker, more flexible, more easily deformed | More stiffness and strength |