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Development of generic Asian pelvic bone models using CT-based 3D statistical modelling.

Marc-Daniel Ahrend1,2, Hansrudi Noser1, Rukmanikanthan Shanmugam3

  • 1AO Research Institute Davos, Davos, Switzerland.

Journal of Orthopaedic Translation
|January 8, 2020
PubMed
Summary

This study developed the first Asian artificial bone model (ABM) of the pelvis, revealing significant anatomical differences compared to existing Caucasian models. The new Asian ABM is crucial for accurate biomechanical research and implant development in Asian populations.

Keywords:
Bone modelsBone shapePelvic anatomySurgical education

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Area of Science:

  • Orthopaedic biomechanics
  • Anatomical modeling
  • Medical device development

Background:

  • Artificial bone models (ABMs) are vital tools in orthopaedics for biomechanical research, implant development, and education.
  • Existing commercial ABMs predominantly represent European anatomy, potentially limiting their applicability to diverse populations like Asians.
  • A need exists for anatomically accurate ABMs reflecting Asian pelvic morphology for research and clinical applications.

Purpose of the Study:

  • To develop the first 3D artificial bone model (ABM) of the Asian pelvis.
  • To compare the developed Asian pelvic ABM with a commercially available Caucasian male pelvic ABM (Synbone®).
  • To analyze gender-related and population-specific anatomical variations within the Asian pelvis.

Main Methods:

  • Acquisition and segmentation of 100 clinical computed tomography (CT) scans from adult Asian pelvises (Malay, Chinese, Indian descent; 50 male, 50 female).
  • Generation of 3D statistical and mean pelvic models (overall, male, female) using defined landmarks.
  • Quantification of anatomical differences using principal component analysis and measurements of key pelvic landmarks (ASIS, AIIS, CV, DT) for comparison.

Main Results:

  • Significant anatomical variations in pelvic shape and size were observed within the Asian population.
  • The developed Asian pelvic model was found to be smaller overall compared to the existing Caucasian ABM, with significant differences in ASIS, AIIS, and CV measurements.
  • Notable gender-related differences were identified, particularly in conjugate vera (CV) and diameter transversa (DT), while variations among Chinese, Malay, and Indian descents were not significant.

Conclusions:

  • The substantial anatomical differences between the developed Asian ABM and the existing Caucasian ABM underscore the need for population-specific models.
  • The development of an Asian-specific and gender-specific ABM is crucial for advancing biomechanical research and optimizing implant design for the Asian population.
  • This study highlights the importance of considering ethnic and gender diversity in the creation of anatomical models for orthopaedic applications.