Journal
JOURNAL OF BIOMECHANICS
Volume 43, Issue 3, Pages 587-591Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jbiomech.2009.09.036
Keywords
Bone strain; Telemetry; In vivo; Strain event; Strain rate
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Long-term in-vivo recordings of habitual bone strain in freely moving animals are needed to better understand the everyday mechanical loading environment responsible for bone-tissue maintenance. However, wireless methods to make such recordings are scarce. We report on the successful customisation of a commercially available voltage transmitter hooked-LIP to a strain-gauge rosette, its subcutaneous implantation in rabbits, and the quality of the implant's strain-gauge recordings. Continuous wireless recordings of a completely operational strain-gauge rosette glued to the mandibular surface of a freely moving rabbit could be made up to 33 h. The resolution of the system was 1.5 microstrains/bit. The noise in the signal was 4.5 microstrains. To facilitate the automatic Counting of bone-strain events in the retrieved data, and to calculate their peak amplitude, a novel approach is presented. The described technique enables the quantification of the daily bone-strain history defining the architecture and composition of bone tissue, and can help to further elucidate the strain parameters which influence bone tissue. (C) 2009 Elsevier Ltd. All rights reserved.
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