Measurements of thermal properties for human femora

Abstract

In this study, density, specific heat, thermal conductivity, and thermal diffusivity were measured experimentally along the lengths of human cadaveric femora. Fresh and dry bone samples were selected from both male and female specimens, and for different age groups varying between 44 and 73 years old. Measured values for specific heat vary between 1.14 and 2.37 J/gm degrees C; for thermal conductivities the range is from 0.16 to 0.34 W/m degrees C; and for thermal diffusivities the range is from 0.10 to 0.23 cm2/sec, depending on whether the bone samples were fresh or dry, cancellous or cortical. The experimental results are presented in non-dimensional coordinates and are compared with the few other data available in the literature.

Understanding straining induced changes in thermal properties of tropocollagen-hydroxyapatite interfacial configurations

“…Zelenov (1986) investigated the thermophysical properties of compact bone by heating the bone sample. Biyikli et al (1986) measured experimentally the specific heat, thermal conductivity and thermal diffusivity of the human femora and the results agreed well with the data available at that time. Moses et al (1995) introduced the inverse conduction technique, measured the thermal conductivity of cortical bone and compared the experimental results with literature values.…”

“…Calculations were stopped once the convergence in the computed D values is obtained. The calculated thermal diffusivity varies from 1 × 10 -7 m 2 /s to 7 × 10 -7 m 2 /s of the simulated systems at different strain levels at the temperature of 300 K. The reported values of thermal diffusivity (Biyikli et al, 1986;Zelenov, 1986) using experimental measurements are varying from 1 × 10 -7 m 2 /s to 70 × 10 -7 m 2 /s of bone samples at a temperature range of 20°C to 100°C. The thermal conductivity of the system was calculated using the equation (8) with the known diffusivity values and the specific heat calculated from EMD simulation.…”

Temperature control with internally applied cooling in solid material drilling: an experimental, biomechanical study

“…Earlier investigations have shown a reduction in drilling temperature by external cooling and high feed forces [13][14][15][16][17]. Another study indicated an increase in drilling temperature when using a blunt drill.…”

In-vitro experimental analysis and numerical study of temperature in bone drilling

“…Similarly, the reason for the rise in bone temperature with the growing speed of the drill penetration (feed rate) into the specimen was the rise in the friction between the drill and the bone. The reason behind a significant drop of temperature away from the cutting region was the low heat transport capability of the bone tissue [23,26].…”