Numéro
J. Phys. IV France
Volume 04, Numéro C4, Avril 1994
3rd International Conference Laser M2P
Page(s) C4-269 - C4-269
DOI http://dx.doi.org/10.1051/jp4:1994462
3rd International Conference Laser M2P

J. Phys. IV France 04 (1994) C4-269-C4-269

DOI: 10.1051/jp4:1994462

Laser induced mechanical effects in biomaterials

G. DELACRÉTAZ, K. RINK and T. ASSHAUER

Laboratoire d'Optique Appliquée, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland


Abstract
Mechanical effects induced by lasers with nanoseconds to hundreds of microseconds pulse duration on biomaterials are discussed. Strong shock waves are generally observed during laser irradiation due to very rapid heating and phase change in the interaction zone. Moreover even stronger shock waves can be generated some hundreds of microseconds later in response to the collapse of the induced cavitation bubble in confined environment. The impact of the laser induced cavitation processes on the observed damage on selected biotargets (bone, cartilage and urinary stones) will be discussed. The effect of the laser pulse characteristics on both acoustical transients will be discussed as well.



© EDP Sciences 1994