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Related Experiment Video

Updated: Jan 1, 2026

Computed Tomography and Optical Imaging of Osteogenesis-angiogenesis Coupling to Assess Integration of Cranial Bone Autografts and Allografts
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Quantifying Vascular Changes Surrounding Bone Regeneration in a Porcine Mandibular Defect Using Computed Tomography.

Patricia Carlisle1,2, Jeffrey Marrs1,3, Laura Gaviria4

  • 1Dental Trauma and Research Detachment, United States Army Institute of Surgical Research, Fort Sam Houston, San Antonio, Texas.

Tissue Engineering. Part C, Methods
|December 19, 2019
PubMed
Summary

Computed tomography (CT) effectively evaluated vascular changes around bone defects treated with rhBMP-2, showing increased vessel volume and number without altering architecture, confirming therapeutic safety and CT

Keywords:
CTbone regenerationmandiblepigvascular morphology

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Area of Science:

  • Biomedical Engineering
  • Regenerative Medicine
  • Medical Imaging

Background:

  • Angiogenesis is crucial for bone healing, but its evaluation typically relies on invasive histology or ex vivo methods.
  • Computed tomography (CT) offers noninvasive, high-resolution 3D imaging, yet its application in assessing vascular response during bone repair is limited.
  • Understanding soft tissue vascular changes is vital for tissue engineering success and therapeutic efficacy.

Purpose of the Study:

  • To evaluate the effects of recombinant human bone morphogenetic protein-2 (rhBMP-2) eluting grafts on soft tissue vascular architecture surrounding a bone defect.
  • To demonstrate the efficacy of contrast-enhanced clinical 64-slice CT in quantitatively assessing vascular architecture over 12 weeks.
  • To validate CT analysis as a method for studying vascular adaptation in large animal models and potential clinical translation.

Main Methods:

  • A large segmental bone defect model was created in the minipig mandible.
  • Treatment involved rhBMP-2 eluting grafts.
  • Contrast-enhanced, clinical 64-slice CT was used to quantitatively analyze vascular architecture (volume, number, morphology) over 12 weeks.

Main Results:

  • rhBMP-2 treatment positively impacted vessel volume and number from 4 to 12 weeks post-treatment.
  • Vessel number was significantly higher at 4 weeks in the rhBMP-2 treated group.
  • Analysis revealed no significant changes in vessel architecture, indicating therapeutic safety.

Conclusions:

  • Clinical CT analysis is a validated, relevant imaging method for quantitative and qualitative assessment of vascular tissue around bone healing sites.
  • CT technology is sensitive to spatial and temporal changes in vascularization and applicable to large animal models, with potential for clinical translation.
  • The study demonstrates the efficacy of rhBMP-2 in promoting vascularization without adverse architectural changes, supporting its use in bone tissue engineering.