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Effects of continuous‐wave laser systems on stapes footplate
Author(s) -
Jovanovic Sergije,
Schönfeld Uwe,
Prapavat Viravuth,
Berghaus Alexander,
Fischer Rudi,
Scherer Hans,
Müller Gerhard J.
Publication year - 1996
Publication title -
lasers in surgery and medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 112
eISSN - 1096-9101
pISSN - 0196-8092
DOI - 10.1002/(sici)1096-9101(1996)19:4<424::aid-lsm7>3.0.co;2-u
Subject(s) - footplate , stapes , laser , continuous wave , perforation , materials science , reproducibility , argon , optics , laser doppler vibrometer , biomedical engineering , laser beams , surgery , medicine , chemistry , middle ear , composite material , mechanical engineering , physics , organic chemistry , chromatography , engineering , punching
Background and Objective The aim of the present study was to clarify which of the presently available continuous‐wave laser systems are best suited for application in stapes surgery. Study Design/Materials and Methods Isolated human stapes and bovine compact‐bone platelets were used to investigate the connections between the parameters of various laser systems and their effects on bone tissue. The purpose was to optimize the laser parameters required to achieve a perforation measuring 500 μm to 600 μm in diameter. Three different laser systems were applied: the argon and CO 2 laser in continuous wave (cw) mode and the CO 2 laser in superpulse mode. Results The suitability of the argon laser for stapedotomy is doubtful in view of the lower absorption coefficient of the stapes for the argon beam and the considerable influence which the degree of pigmentation of the irradiated medium exerts on its effect with the resultant poor reproducibility of the perforation diameter. The beam of the CO 2 laser is far better absorbed at the footplate than that of the argon laser. This results in higher effectivity, lower thermic side effects, and better reproducibility of the perforation. The two modes of the CO 2 laser do not show any appreciable differences. Conclusion The experimental results presented indicate that the CO 2 laser in cw and superpulse mode is the most suitable of the systems now clinically applied in stapes surgery. © 1996 Wiley‐Liss, Inc.