Development of non-invasive Raman spectroscopy for in vivo evaluation of bone graft osseointegration in a rat model

The use of bone structural allografts for reconstruction following tumor resection is widespread, although successful incorporation and regeneration remain uncertain. There are few non-invasive methods to fully assess the progress of graft incorporation. Computed tomography and MRI provide informati...

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Bibliographic Details
Published in:Analyst (London) 2010-12, Vol.135 (12), p.3142-3146
Main Authors: OKAGBARE, Paul I, ESMONDE-WHITE, Francis W. L, GOLDSTEIN, Steven A, MORRIS, Michael D
Format: Article
Language:English
Subjects:
Analytical chemistry
Animals
Biological and medical sciences
Bone Transplantation - methods
Cell physiology
Cell transformation and carcinogenesis. Action of oncogenes and antioncogenes
Chemistry
Exact sciences and technology
Fundamental and applied biological sciences. Psychology
Humans
Molecular and cellular biology
Osseointegration
Phantoms, Imaging
Rats
Rats, Sprague-Dawley
Spectrometric and optical methods
Spectrum Analysis, Raman - instrumentation
Spectrum Analysis, Raman - methods
Tibia - anatomy & histology
Transplantation, Homologous
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Summary:The use of bone structural allografts for reconstruction following tumor resection is widespread, although successful incorporation and regeneration remain uncertain. There are few non-invasive methods to fully assess the progress of graft incorporation. Computed tomography and MRI provide information on the morphology of the graft/host interface. Limited information is also available from DXA and ultrasound. Only few techniques can provide information on the metabolic status of the graft, such as the mineral and matrix composition of the regenerated tissue that may provide early indications of graft success or failure. To address this challenge, we discuss here the implementation of Raman spectroscopy for in vivo assessment of allograft implantation in a rat model. An array of optical fibers was developed to allow excitation and collection of Raman spectra through the skin of rat at various positions around the rat's tibia. The system is calibrated against locally constructed phantoms that mimic the morphology, optics and spectroscopy of the rat. The system was evaluated by carrying out transcutaneous Raman measurement on rat. Bone mineral and matrix Raman bands are successfully recovered. This new technology provides a non-invasive method for in vivo monitoring of bone graft osseointegration.
ISSN:0003-2654
1364-5528
DOI:10.1039/c0an00566e