The origin of stress‐generated potentials in fluid‐saturated bone

D. Pienkowski, S. R. Pollack

Research output: Contribution to journalArticlepeer-review

131 Scopus citations

Abstract

The objective of this study was to determine the origin of stressgenerated potentials (SGPs) in fluid‐saturated bone. Stress‐generated potentials were studied as a function of the conductivity, NaCl concentration, and viscosity of the fluid contained within cortical human and bovine bone. Bone samples were soaked in solutions in which NaCl and sucrose concentrations were systematically varied. Macroscopic SGPs and their relaxation times were measured as a function of these properties. Stress‐generated potentials were also measured as a function of conductivity and NaCl concentration by using a microelectrode. The results of this study confirmed that the properties of the fluid in bone have a great influence on the magnitude and time dependence of the SGP. Especially notable was the observation that solutions of high NaCl concentration consistently reversed the polarity of the SGP. These results are consistent with streaming potential theory. Although fluid‐saturated bone may retain some piezoelectric properties, SGPs are predominantly caused by streaming potentials.

Original languageEnglish
Pages (from-to)30-41
Number of pages12
JournalJournal of Orthopaedic Research
Volume1
Issue number1
DOIs
StatePublished - 1983

Keywords

  • Electromechanical effect
  • Piezoelectricity
  • Strain‐related potentials
  • Streaming potentials
  • Stress‐generated potentials

ASJC Scopus subject areas

  • Orthopedics and Sports Medicine

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