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Characterizing the Composition of Bone Formed During Fracture Healing Using Scanning Electron Microscopy Techniques.

Perdikouri, Christina LU ; Tägil, Magnus LU and Isaksson, Hanna LU (2015) In Calcified Tissue International 96(1). p.11-17
Abstract
About 5-10 % of all bone fractures suffer from delayed healing, which may lead to non-union. Bone morphogenetic proteins (BMPs) can be used to induce differentiation of osteoblasts and enhance the formation of the bony callus, and bisphosphonates help to retain the newly formed callus. The aim of this study was to investigate if scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) can identify differences in the mineral composition of the newly formed bone compared to cortical bone from a non-fractured control. Moreover, we investigate whether the use of BMPs and bisphosphonates-alone or combined-may have an effect on bone mineralization and composition. Twelve male Sprague-Dawley rats at 9 weeks of age were... (More)
About 5-10 % of all bone fractures suffer from delayed healing, which may lead to non-union. Bone morphogenetic proteins (BMPs) can be used to induce differentiation of osteoblasts and enhance the formation of the bony callus, and bisphosphonates help to retain the newly formed callus. The aim of this study was to investigate if scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) can identify differences in the mineral composition of the newly formed bone compared to cortical bone from a non-fractured control. Moreover, we investigate whether the use of BMPs and bisphosphonates-alone or combined-may have an effect on bone mineralization and composition. Twelve male Sprague-Dawley rats at 9 weeks of age were randomly divided into four groups and treated with (A) saline, (B) BMP-7, (C) bisphosphonates (Zoledronate), and (D) BMP-7 + Zoledronate. The rats were sacrificed after 6 weeks. All samples were imaged using SEM and chemically analyzed with EDS to quantify the amount of C, N, Ca, P, O, Na, and Mg. The Ca/P ratio was the primary outcome. In the fractured samples, two areas of interest were chosen for chemical analysis with EDS: the callus and the cortical bone. In the non-fractured samples, only the cortex was analyzed. Our results showed that the element composition varied to a small extent between the callus and the cortical bone in the fractured bones. However, the Ca/P ratio did not differ significantly, suggesting that the mineralization at all sites is similar 6 weeks post-fracture in this rat model. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Calcified Tissue International
volume
96
issue
1
pages
11 - 17
publisher
Springer
external identifiers
  • pmid:25537634
  • wos:000347709400002
  • scopus:84926621165
ISSN
1432-0827
DOI
10.1007/s00223-014-9930-z
language
English
LU publication?
yes
id
b1ea32c8-2f6d-43a4-b094-63bc5cbcc5c0 (old id 4905681)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/25537634?dopt=Abstract
date added to LUP
2015-01-07 13:47:40
date last changed
2017-09-24 03:13:51
@article{b1ea32c8-2f6d-43a4-b094-63bc5cbcc5c0,
  abstract     = {About 5-10 % of all bone fractures suffer from delayed healing, which may lead to non-union. Bone morphogenetic proteins (BMPs) can be used to induce differentiation of osteoblasts and enhance the formation of the bony callus, and bisphosphonates help to retain the newly formed callus. The aim of this study was to investigate if scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) can identify differences in the mineral composition of the newly formed bone compared to cortical bone from a non-fractured control. Moreover, we investigate whether the use of BMPs and bisphosphonates-alone or combined-may have an effect on bone mineralization and composition. Twelve male Sprague-Dawley rats at 9 weeks of age were randomly divided into four groups and treated with (A) saline, (B) BMP-7, (C) bisphosphonates (Zoledronate), and (D) BMP-7 + Zoledronate. The rats were sacrificed after 6 weeks. All samples were imaged using SEM and chemically analyzed with EDS to quantify the amount of C, N, Ca, P, O, Na, and Mg. The Ca/P ratio was the primary outcome. In the fractured samples, two areas of interest were chosen for chemical analysis with EDS: the callus and the cortical bone. In the non-fractured samples, only the cortex was analyzed. Our results showed that the element composition varied to a small extent between the callus and the cortical bone in the fractured bones. However, the Ca/P ratio did not differ significantly, suggesting that the mineralization at all sites is similar 6 weeks post-fracture in this rat model.},
  author       = {Perdikouri, Christina and Tägil, Magnus and Isaksson, Hanna},
  issn         = {1432-0827},
  language     = {eng},
  number       = {1},
  pages        = {11--17},
  publisher    = {Springer},
  series       = {Calcified Tissue International},
  title        = {Characterizing the Composition of Bone Formed During Fracture Healing Using Scanning Electron Microscopy Techniques.},
  url          = {http://dx.doi.org/10.1007/s00223-014-9930-z},
  volume       = {96},
  year         = {2015},
}