Mechanical behavior of cartilage during laser irradiation

Sergio H. Diaz-Valdes; Enrique J. Lavernia; Brian Jet-Fei Wong M.D.

doi:10.1117/12.434740

9 July 2001 Mechanical behavior of cartilage during laser irradiation

Sergio H. Diaz-Valdes, Enrique J. Lavernia, Brian Jet-Fei Wong M.D.

Proceedings Volume 4257, Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical; (2001) https://doi.org/10.1117/12.434740
Event: BiOS 2001 The International Symposium on Biomedical Optics, 2001, San Jose, CA, United States

Abstract

Internal stress σ(t), diffuse transmitted light intensity I(t) from a He-Ne probe laser (λ= 632.8 nm), and radiometric surface temperature T_s(t) were measured during the photothermal heating of porcine septal cartilage using a pulsed Nd:YAG laser (λ= 1.32 μm). Rectangular specimens, 1-4 mm thick, were secured to a tensile force testing rig and laser irradiated. Force measurements during heating showed significant variation in the rate of deformation, which were found to be strong dependent on tissue orientation; revealing the anisotropic nature of its thermo-mechanical properties. These finding suggest that the collagen and proeoglycan networks lie in a preferential orientation within the extracellular matrix, which must be addressed before this procedure can be used on a wider basis.

Citation Download Citation

Sergio H. Diaz-Valdes, Enrique J. Lavernia, and Brian Jet-Fei Wong M.D. "Mechanical behavior of cartilage during laser irradiation", Proc. SPIE 4257, Laser-Tissue Interaction XII: Photochemical, Photothermal, and Photomechanical, (9 July 2001); https://doi.org/10.1117/12.434740

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