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Capacitive interdigitated system of high osteoinductive/conductive performance for personalized acting-sensing

Bárbara M de Sousa1, Clara R Correia2, Jorge A F Ferreira3

  • 1Department of Medical Sciences, Institute of Biomedicine (iBiMED), University of Aveiro, 3810-193, Aveiro, Portugal.

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Summary

Novel bioelectronic implants use high-frequency stimulation to enhance bone growth and integration, addressing limitations of current orthopedic implants for better patient outcomes.

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Area of Science:

  • Biomaterials Science
  • Regenerative Medicine
  • Bioelectronics

Background:

  • Orthopedic implant failure necessitates improved osseointegration and long-term bone maintenance.
  • Current implants lack personalized, active control over the bone-implant interface.
  • Bioelectronic devices offer potential for monitoring and stimulating peri-implant bone.

Purpose of the Study:

  • To investigate the efficacy of a novel capacitive stimulator for promoting osteogenesis.
  • To evaluate high-frequency (HF) electrical stimulation for bone healing.
  • To explore the potential of bioelectronic implants for personalized peri-implant tissue management.

Main Methods:

  • Utilized a sensing-compatible capacitive stimulator with interdigitated electrodes.
  • Applied 60 kHz HF electrical stimulation (30 min/day) to pre-osteoblasts and human adipose-derived mesenchymal stem cells (hASCs).
  • Conducted proteomic analysis of microvesicles from stimulated osteoblasts.

Main Results:

  • HF stimulation promoted osteoconduction in pre-osteoblasts and osteoinduction in hASCs.
  • Significant increases observed in osteoblasts' collagen-I synthesis, matrix, and mineral deposition.
  • Proteomics revealed regulation of key osteodifferentiation and mineralization proteins.
  • hASCs showed enhanced osteogenic commitment and hydroxyapatite deposition.

Conclusions:

  • Capacitive HF stimulation is a promising osteoinductive and osteoconductive approach.
  • This technology can be integrated into bioelectronic implants for active bone regeneration.
  • Future implants could monitor and personalize stimulation for improved bone-implant integration.