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Influence of physical activity on tibial bone material properties in laying hens

TitleInfluence of physical activity on tibial bone material properties in laying hens
Publication TypeJournal Article
Year of Publication2018
AuthorsRodriguez-Navarro, AB, McCormack, HM, Fleming, RH, Alvarez-Lloret, P, Romero-Pastor, J, Dominguez-Gasca, N, Prozorov, T, Dunn, IC
JournalJournal of Structural Biology
Date Published01
Type of ArticleArticle
ISBN Number1047-8477
Accession NumberWOS:000423010700005
Keywordsage, apatite, Avian osteoporosis, Biophysics, Bone, Bone fractures, cell biology, environment, exercise, Laying hens, mechanical function, medullary bone, mineralization, Molecular Biology, osteoporosis, Physical activity, prevention, quality, turnover

ies such as cortical and medullary bone mineral composition and crystallinity as well as collagen maturity did not differ between lines. However, bone material properties of birds from the different type of housing were markedly different. The cortical bone in aviary birds had a lower degree of mineralization and bone mineral was less mature and less organized than in caged birds. These differences can be explained by increased bone turnover rates due to the higher physical activity of aviary birds that stimulates bone formation and bone remodeling. Multivariate statistical analyses shows that both cortical and medullary bone contribute to breaking strengthThe cortical thickness was the single most important contributor while its degree of mineralization and porosity had a smaller contribution. Bone properties had poorer correlations with mechanical properties in cage birds than in aviary birds presumably due to the greater number of structural defects of cortical bone in cage birds.

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