Comparative study of soft tissue surgery by visible and infrared laser radiation.

Abstract

Lasers are widely used in surgery, including 445 nm diode lasers in dentistry, 532 nm KTP lasers in ENT surgery, near infrared lasers in dentistry. However, there is lack of information on direct comparison of the effectiveness of these lasers in cutting soft tissues.
The purpose of this study to compare the efficiency of cutting blood rich tissues using lasers with 445 nm, 532 nm and 808 nm wavelengths using different methods of delivery radiation to the tissue.
Porcine heart section was used as a model of human soft blood rich tissue. Lasers with wavelength of 445, 532 and 808 nm were used with the same average power (2.3, 5, 10, 15 W). Radiation was delivered to the tissue either: contactless through handpiece; contactless through optical fiber; in contact through optical fiber. Fiber or handpiece was moved at a speed of 3 mm/s using motorized two axis linear translator. The evaluation of the cut parameters was carried out by optical microscopy (the preparations were stained with nitroblue tetrazolium chloride (NBTC)).
Among all prototypes presented in this study the highest efficiency was demonstrated for a laser with wavelength of 445 nm in any cutting mode. The prototype with a wavelength of 532 nm allowed to cuts with less depth and wider coagulation zone. The lowest cut depth has a prototype with wavelength of 808 nm.

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Speaker

Andrey
MeLSyTech Ltd
Russia

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