TY - JOUR
T1 - In vivo application of an optical segment tracking approach for bone loading regimes recording in humans
T2 - A reliability study
AU - Yang, Peng-Fei
AU - Sanno, Maximilian
AU - Ganse, Bergita
AU - Koy, Timmo
AU - Brüggemann, Gert-Peter
AU - Müller, Lars Peter
AU - Rittweger, Jörn
N1 - Copyright © 2014 IPEM. Published by Elsevier Ltd. All rights reserved.
PY - 2014/6/3
Y1 - 2014/6/3
N2 - This paper demonstrates an optical segment tracking (OST) approach for assessing the in vivo bone loading regimes in humans. The relative movement between retro-reflective marker clusters affixed to the tibia cortex by bone screws was tracked and expressed as tibia loading regimes in terms of segment deformation. Stable in vivo fixation of bone screws was tested by assessing the resonance frequency of the screw-marker structure and the relative marker position changes after hopping and jumping. Tibia deformation was recorded during squatting exercises to demonstrate the reliability of the OST approach. Results indicated that the resonance frequencies remain unchanged prior to and after all exercises. The changes of Cardan angle between marker clusters induced by the exercises were rather minor, maximally 0.06°. The reproducibility of the deformation angles during squatting remained small (0.04°/m-0.65°/m). Most importantly, all surgical and testing procedures were well tolerated. The OST method promises to bring more insights of the mechanical loading acting on bone than in the past.
AB - This paper demonstrates an optical segment tracking (OST) approach for assessing the in vivo bone loading regimes in humans. The relative movement between retro-reflective marker clusters affixed to the tibia cortex by bone screws was tracked and expressed as tibia loading regimes in terms of segment deformation. Stable in vivo fixation of bone screws was tested by assessing the resonance frequency of the screw-marker structure and the relative marker position changes after hopping and jumping. Tibia deformation was recorded during squatting exercises to demonstrate the reliability of the OST approach. Results indicated that the resonance frequencies remain unchanged prior to and after all exercises. The changes of Cardan angle between marker clusters induced by the exercises were rather minor, maximally 0.06°. The reproducibility of the deformation angles during squatting remained small (0.04°/m-0.65°/m). Most importantly, all surgical and testing procedures were well tolerated. The OST method promises to bring more insights of the mechanical loading acting on bone than in the past.
U2 - 10.1016/j.medengphy.2014.05.005
DO - 10.1016/j.medengphy.2014.05.005
M3 - Journal articles
C2 - 24907129
SN - 1873-4030
VL - 36
SP - 1041
EP - 1046
JO - Medical Engineering Physics
JF - Medical Engineering Physics
IS - 8
ER -