ECTS2016 Poster Presentations Bone development/growth and fracture repair (35 abstracts)
Interrelationships between morphometric, densitometric and mechanical properties of femur in ostriches (Struthio Camelus)
Witold Krupski 1 , Marcin Tatara 1, , Anna Charuta 3 , Adam Brodzki 4 , Iwona Luszczewska-Sierakowska 5 , Ewa Polawska 6 , Artur Jozwik 6 , Nina Strzalkowska 6 & Jaroslaw Horbanczuk 6
1II Department of Radiology, Medical University in Lublin, ul. Staszica 16, Lublin, Poland; 2Department of Animal Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, ul. Akademicka 12, Lublin, Poland; 3Institute of Health, Faculty of Natural Science, Siedlce University of Natural Sciences and Humanities, ul. Konarskiego 2, Siedlce, Poland; 4Department and Clinic of Animal Surgery, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, ul. Głęboka 30, Lublin, Poland; 5Chair of Human Anatomy, Department of Normal Anatomy, Medical University in Lublin, ul. Jaczewskiego 4, Lublin, Poland; 6Department of Animal Improvement, Institute of Genetics and Animal Breeding, Polish Academy of Sciences, Jastrzębiec, ul. Postępu 1, Jastrzebiec, Poland.
The aim of the study was to evaluate interrelationships between morphometric, densitometric and mechanical properties of femur in ostriches (Struthio camelus). 14-month-old male and female ostriches (N=46) were slaughtered to obtain left femur for analyses. Using quantitative computed tomography (QCT) technique, volumetric bone mineral density (vBMD) of the trabecular (Td) and cortical bone (Cd) were measured. Bone mineral density (BMD) and bone mineral content (BMC) were determined using dual-energy X-ray absorptiometry (DEXA) method. Cross-sectional area (A), second moment of inertia (Ix), mean relative wall thickness (MRWT) and cortical index (CI) were derived from the measurements of horizontal and vertical diameters of femur in the midshaft. Using three-point bending test, mechanical parameters such as maximum elastic strength (Wy) and ultimate strength (Wf) of femur were determined. Pearson’s correlation coefficient (r) was determined between all the investigated variables and P<0.05 was considered as statistically significant. Positive correlations of bone weight, bone length, BMC and Ix with final body weight were found (P<0.05). Bone weight was positively correlated with bone length, BMD, BMC, A, Ix, MRWT and CI (P<0.05). Td was positively correlated with Cd, BMD and Wy (P<0.05). BMD was positively correlated with BMC, A, Ix, MRWT, CI, Wy and Wf (P<0.05). BMC was positively corretated with bone length, A, Ix and Wy (P<0.05). Cross-sectional area was positvely correlated with all the investigated geometrical and mechanical parameters, while Ix was positively correlated with CI, Wy and Wf (P<0.05). Positive correlations between MRWT and CI, as well as between Wy and Wf were found (P<0.05).
In conclusion, this study showed numerous interrelationships between morphometric, densitometric and mechanical properties of femur in ostrich. These results indicate that femur from ostrich may be used as an experimental model for further studies on metabolic response of skeletal system to environmental, physiological, nutritional, toxicological and pharmacological factors.
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ISSN 2052-1219 (online)
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