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Artículo

Effect of the trabecular bone microstructure on its thermal conductivity: measurements and a computer modelling-based study

Fajardo Freites, Jesús ErnestoIcon ; Carlevaro, Carlos ManuelIcon ; Vericat, FernandoIcon ; Berjano, Enrique; Irastorza, Ramiro MiguelIcon
Fecha de publicación: 10/2018
Editorial: Pergamon-Elsevier Science Ltd
Revista: Journal of Thermal Biology
ISSN: 0306-4565
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Tecnología de Laboratorios Médicos

Resumen

Objective: Computer models have been proposed to evaluate heat transfer in bone tissues resulting from thermal ablation, mechanical drilling, or associated with bone cement in joint prosthesis. The lack of knowledge of the influence of microstructure and marrow on the effective thermal conductivity of trabecular bone makes these modeling less accurate. We conduct experiments and computer simulations in order to quantify it. Approach: Thermal conductivities of twenty bovine trabecular bone samples were measured in two states: non defatted and defatted. A two dimensional realistic computer model was built from microscope images of a typical sample. Main results. Temperature dependence similar to that reported for most tissues (+0.2 % ºC-1) was found. The effects of microstructure, marrow content, and the experimental conditions were explained by computer modeling considering only three media: matrix, marrow (pore), and gap (between probe and sample). The inclusion of the gap filled by PBS has implied an increase of the effective thermal conductivity and generates a systematic error that can be disaffected. Computer results have also shown that the presence of a gap around the energy applicator during hyperthermic procedures is negligible (<0.7ºC) when the gap has been full by PBS and practically does not modify the isotherms location. Significance. Experimental studies where thermal conductivity is measured by inserting a probe in the bone through a drill should take our findings into account. Homogeneous tissue models can be considered for simulations of trabecular bone heat conduction using the temperature depence coefficient found in this work.
Palabras clave: COMPUTER MODEL , THERMAL CONDUCTIVITY , TRABECULAR BONE
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/91075
URL: https://www.sciencedirect.com/science/article/pii/S0306456518302213
DOI: http://dx.doi.org/10.1016/j.jtherbio.2018.08.009
Colecciones
Articulos(IFLYSIB)
Articulos de INST.FISICA DE LIQUIDOS Y SIST.BIOLOGICOS (I)
Citación
Fajardo Freites, Jesús Ernesto; Carlevaro, Carlos Manuel; Vericat, Fernando; Berjano, Enrique; Irastorza, Ramiro Miguel; Effect of the trabecular bone microstructure on its thermal conductivity: measurements and a computer modelling-based study; Pergamon-Elsevier Science Ltd; Journal of Thermal Biology; 77; 10-2018; 131-136
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