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Bone Material Properties of Human Phalanges Using Vickers Indentation.

Bing Yin1,2, Jia-Liang Guo1,2, Jian-Zhao Wang1,2

  • 1Department of Orthopaedic Surgery, The Third Hospital of Hebei Medical University, Shijiazhuang, Hebei, China.

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|May 1, 2019
PubMed
Summary
This summary is machine-generated.

The Vickers hardness of human phalanges varies by bone and location, with the shaft being hardest and the 3rd phalanx showing the highest overall hardness. This bone quality data aids orthopedic surgery and implant design.

Keywords:
BiomechanicsBone hardnessHardness distributionVickers hardness

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Area of Science:

  • Orthopedic biomechanics
  • Skeletal tissue engineering
  • Materials science

Background:

  • Bone mechanical properties are crucial for skeletal integrity and surgical interventions.
  • Assessing bone quality at a tissue level requires precise measurement techniques.
  • The human hand phalanges are complex structures with potential variations in mechanical properties.

Purpose of the Study:

  • To investigate the microhardness distribution across human hand phalanges using the Vickers method.
  • To evaluate bone mechanical properties at the tissue level.
  • To provide data for improving orthopedic surgical techniques and implant development.

Main Methods:

  • Human phalanges were obtained from three healthy donors.
  • Bones were sectioned into slices from the base, shaft, and head.
  • Vickers microhardness testing was performed on cortical and trabecular bone sites.

Main Results:

  • Overall Vickers hardness in phalanges averaged 34.11 ± 7.95 HV.
  • The 3rd, 1st, and 2nd phalanges exhibited higher hardness than the 4th and 5th.
  • Phalanx shaft bone was significantly harder than the base and head bone.
  • Proximal phalanges demonstrated higher hardness than middle phalanges.

Conclusions:

  • This study provides a detailed map of Vickers hardness distribution in human phalanges.
  • Findings offer a theoretical basis for understanding bone hardness variations.
  • Data can inform screw and plate placement in orthopedic surgery and guide the design of artificial bones and 3D-printed implants with tailored hardness gradients.