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Updated: Aug 9, 2026

Implantation and Control of Wireless, Battery-free Systems for Peripheral Nerve Interfacing
Published on: October 20, 2021
Programmable implants--from pulsatile to controlled release
1Department of Pharmaceutical Technology, University of Regensburg, Universitätsstrasse 31, D-93040 Regensburg, Germany.
Abstract:
The aim of this study was to develop programmable implants with a reproducible delayed onset of release followed by several weeks of controlled release. For this purpose, a drug-loaded core was embedded into a drug-free bulk-eroding poly(D,L lactic-co-glycolic acid) or poly(D,L lactic acid) mantle. The manufacturing procedure was established and optimized for three mantle materials, which showed delay times ranging from 7 to 83 days. Triglycerides with fatty acid chain lengths from C12 to C18 were investigated as core materials, producing release periods from 2 to 16 weeks. Concomitantly, applying a convolution/deconvolution model showed the possibility of theoretical prediction of the resulting release profiles.
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