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Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees
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Bioactive Electrode System With External Connectivity for Electrically Augmented Bone Regeneration.

Lijuan Wang1, Shuang Deng2, Jiexiang Zhan1

  • 1College of Biological Science and Medical Engineering, Donghua University, Shanghai, China.

Advanced Healthcare Materials
|June 29, 2026
PubMed
Summary
This summary is machine-generated.

This study developed a bioactive electrode scaffold that integrates electrical stimulation with a pro-osteogenic microenvironment to enhance bone regeneration. The novel system significantly increased bone volume in a rat model, offering a promising therapy for bone defects.

Keywords:
bioactive electrode systembone regenerationelectrical stimulationexternal connectivityosteogenic microenvironment

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Bioelectricity

Background:

  • Electrical stimulation (ES) shows potential for bone regeneration by mimicking bioelectric cues.
  • Current ES delivery systems face challenges in maintaining stable electrical connections and creating optimal osteogenic environments for in vivo applications.
  • Effective ES delivery for bone defects requires systems that integrate controlled electrical signaling with a supportive microenvironment.

Purpose of the Study:

  • To develop a bioactive electrode system that combines controlled electrical stimulation with an osteogenic microenvironment for enhanced bone regeneration.
  • To evaluate the osteogenic and angiogenic potential of the developed scaffold in vitro.
  • To assess the efficacy of the bioactive electrode system in promoting bone regeneration in vivo.

Main Methods:

  • Fabrication of a porous conductive scaffold using a freeze-drying method from gelatin, PEDOT:PSS, and strontium-doped hydroxyapatite, embedded with silver filaments.
  • In vitro evaluation of scaffold biocompatibility, osteogenic differentiation of bone marrow stromal cells (BMSCs), and angiogenesis of human umbilical vein endothelial cells (HUVECs) with and without ES.
  • In vivo assessment of the bioactive system's efficacy in a rat cranial defect model.

Main Results:

  • The fabricated scaffold exhibited appropriate porosity, electrical conductivity, and ion release properties.
  • In vitro studies confirmed scaffold biocompatibility and its ability to promote BMSC osteogenesis and HUVEC angiogenesis, especially with ES.
  • In vivo implantation in a rat cranial defect model resulted in a 2.6-fold increase in bone volume/total volume at 12 weeks compared to controls.

Conclusions:

  • The developed bioactive electrode system effectively integrates electrical signal transmission and a pro-osteogenic microenvironment.
  • This system demonstrates significant potential for enhancing bone regeneration in vivo.
  • The approach offers a promising strategy for treating bone defects using electrically augmented therapies.