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Lamellar bone: structure-function relations.

S Weiner1, W Traub, H D Wagner

  • 1Department of Structural Biology, Weizmann Institute of Science, Rehovot, Israel.

Journal of Structural Biology
|September 4, 1999
PubMed
Summary
This summary is machine-generated.

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Lamellar bone, abundant in mammals, features a unique plywood-like structure. This multifunctional design, akin to "concrete," dictates its mechanical properties and anisotropy.

Area of Science:

  • Biomaterials Science
  • Orthopedic Biomechanics
  • Structural Biology

Background:

  • Bone is a hierarchical material optimized for mechanical function.
  • Lamellar bone is the most prevalent type in mammals, including humans.
  • Understanding its structure-mechanical relationships is crucial for bone biology.

Purpose of the Study:

  • To review the structure-mechanical relations of lamellar bone.
  • To investigate the multifunctional nature of lamellar bone structure.
  • To compare the mechanical properties of lamellar bone with osteonal bone.

Main Methods:

  • Review of existing literature on bone structure and mechanics.
  • Analysis of lamellar bone's hierarchical organization (five sublayers).

Related Experiment Videos

  • Mathematical modeling using a rule-of-mixtures approach to simulate elastic properties.

    • Main Results:

    • Lamellar bone exhibits a complex, rotated plywood-like structure due to aligned mineralized collagen fibrils.
    • Mechanical properties of lamellar bone are anisotropic, varying with direction relative to long bone axes.
    • The intrinsic mechanical properties are largely determined by the lamellar structure itself, with osteonal bone offering advantages in fracture toughness.

    Conclusions:

    • Lamellar bone's structure is proposed to be multifunctional, serving as a fundamental building block ('concrete') within the bone material family.
    • The inherent mechanical properties of lamellar bone are critical, with its structure being a primary determinant of its performance.
    • Mathematical models based on lamellar structure accurately predict mechanical properties, enhancing understanding of bone biomechanics.