Suivi de la déminéralisation osseuse au moyen de réflecteurs de type réseau de Bragg

Suivi de la déminéralisation osseuse au moyen de réflecteurs de type réseau de Bragg

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  Revue de chirurgie orthopédique et traumatologique (2010)  96 , 719 MÉMOIRE ORIGINAL Suivi de la déminéralisation osseuse au moyen deréflecteurs de type réseau de Bragg  Fiber Bragg grating sensor for monitoring bone decalcification V. Mishra a , ∗ , N. Singh a , D.V. Rai b , U. Tiwari a , G.C. Poddar a , S.C. Jain a ,S.K. Mondal a , P. Kapur a a Central Scientific Instruments Organisation, Council of Scientific and Industrial Research, Sector-30,Chandigarh 160030, Inde b Department of Bio Physics, Panjab University, Chandigarh 160014, Inde Acceptation définitive le : 19 avril 2010 KEYWORDS Fiber Bragg grating;Decalcification;Bending strain Summary Introduction.— Estimation of decalcification is a vital tool to discern bone health. Differenttechniques are used for its quantitative measurement e.g. DEXA, QCT and QUS. All thesetechniques although non-invasive suffer from limitations such as radiation exposure andinaccurate values. Recently, fiber optic techniques are fast emerging for medical applicationsowing to their various attractive features like immunity to EMI/RFI, geometric versatility,chemical inertness etc. Subjects and methods.— The effect of decalcification on strain response of a goat tibia wasinvestigated in-vitro using fiber Bragg grating (FBG) sensing technique. The bone was strained byusing three points bending technique and corresponding Bragg wavelength shifts were recorded.Two similar bone samples from the same animal were taken and one was partially decalcified.Strain response of decalcified and untreated bone was taken concurrently to monitor the effectsof calcium loss and that of degradation with time. Results and conclusion.— The strain generated for same stress increased with greater degreeof decalcification and a steep increase occurred after 2g calcium loss, indicating the onsetof damage. The strain response, therefore gives a direct indication of the degree of calciumpresent in the bone. Level of evidence.— Level III.© 2010 Elsevier Masson SAS. All rights reserved. DOI de l’article srcinal: 10.1016/j.otsr.2010.04.010.  Cet article peut être consulté in extenso dans la version anglaise de la revue Orthopaedics & Traumatology: Surgery & Research  sur Science Direct ( en utilisant le DOI ci-dessus. ∗ Auteur correspondant.  Adresse e-mail : (V. Mishra).1877-0517/$ – see front matter © 2010 Elsevier Masson SAS. Tous droits réservés.doi:10.1016/j.rcot.2010.07.013
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