Institute of Theoretical and Applied Mechanics
On Monday April 15th, 2019, dr. Gerardo Presbítero Spinosa will give a lecture on Analysis of bone microdamage with X-ray microtomography towards fatigue fracture prevention. The lecture will take place in the meeting room of the Centre Telč, address: Batelovská 486, Telč 588 56. The lectures will encompass the work done during a project Competitiveness Boost of the Centre of Excellence in Vysočina Region (OP VVV - Mobility, MŠMT).
Analysis of bone microdamage with X-ray microtomography towards fatigue fracture prevention
Lecturer
Gerardo Presbítero Espinosa
Institute of Theoretical and Applied Mechanics, Centre Telč, Academy of Sciences of the Czech Republic
Language: English
Monday April 15 th, 2019, 10 a.m.
We worked in the consolidation of studies performed by us concerning microdamage developments in bones with use of conventional basic fuchsin staining, on the generation and growth of microfractures which provoke the fracture of bones by fatigue. The mentioned conventional staining technique has the disadvantage of being invasive, destructive, two-dimensional (2-D), and tedious. The aim of our current work was the use of a world-unique patented computed tomography device – TORATOM. While previous studies did not detect microcracks by micro-CT prior staining, our study allowed detecting individual microcracks without the use of contrast agents. It is important to mention that microtomography allowed to observe individual microcracks for the first time, and their isolation within a volume enabled to identify their geometrical structure. Accordingly, quantification of microcracks and statistical analysis with the use of Weibull distribution was accomplished, according to a novel concept named characteristic volume. The importance of our findings aims to help define better predictive models to understand and prevent fatigue fractures due to stress and fragility related to osteoporosis, which will be useful in developing new clinical approaches to the problem of osteoporosis.
Microcracks observed in anthropological bones without use of contrast agent. (a) Transverse (top) view, (b-c) lateral views, (d) geometrical structure of microcrack, and (e) isolation of microcracks within a volume.
29 Mar 2019
