Berlin 2005 – wissenschaftliches Programm
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Q: Quantenoptik und Photonik
Q 43: Laser in der Medizin
Q 43.4: Vortrag
Dienstag, 8. März 2005, 14:45–15:00, HU 1070
Prototype laser system for osteotomy — •Martin Werner1, Said Afilal1, Mikhail Ivanenko1, Manfred Klasing1, and Peter Hering1,2 — 1Lasertechnology Group, Research Centre caesar, Bonn (www.caesar.de) — 2Institute of Lasermedicine, University Düsseldorf (www.ilm.uni-duesseldorf.de)
Laser osteotomy, the laser cutting of bone, is not a straightforward task, since bone consists of very strong and temperature stable hydroxyapatite with a melting point above 1200 ∘C on the one hand and of living cells, which will be damaged even by a small temperature rise, on the other hand. Pulsed CO2 lasers, combined with an additional fine air water spray, offer a biologically compliant way to cut bony tissue. The tissue ablation is based on the fast explosion-like evaporation of internal bone liquid, which removes mechanically a thin tissue layer, that has absorbed the laser light. A prototype laser osteotomy system based on a pulsed CO2 slab laser will be introduced. With special irradiation techniques it is possible to achieve cut depths and cutting velocities that are applicable for intra-operative use even in multiplayer bone tissue. First animal trials underline the good medical tolerance of the method already shown in good histological results.