J. Phys. IV France 04 (1994) C4-269-C4-269
Laser induced mechanical effects in biomaterialsG. DELACRÉTAZ, K. RINK and T. ASSHAUER
Laboratoire d'Optique Appliquée, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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