810nm, 980nm, 1470nm and 1950nm diode laser comparison: a preliminary “ex vivo” study on oral soft tissues
2015
The introduction of diode lasers in dentistry has several advantages, mainly consisting on the reduced size, reduced cost
and possibility to beam delivering by optical fibers. At the moment the two diode wavelengths normally utilized in the
dental field are 810 and 980 nm for soft tissues treatments. The aim of this study was to compare the efficacy of four
different diode wavelengths: 810, 980, 1470 and 1950 nm diode laser for the ablation of soft tissues. Several samples of
veal tongue were exposed to the four different wavelengths, at different fluences. The internal temperature of the soft
tissues, in the area close to the beam, was monitored with thermocouple during the experiment. The excision quality of
the exposed samples have been characterized by means of an optical microscope. Tissue damages and the cut regularity
have been evaluated on the base of established criteria. The lowest thermal increase was recorded for 1950 nm laser.
Best quality and speed of incision were obtained by the same wavelength. By evaluating epithelial, stromal and vascular
damages for all the used wavelengths, the best result, in terms of “tissue respect”, have been obtained for 1470 and 1950
nm exposures. From the obtained results 1470 and 1950 nm diode laser showed to be the best performer wavelengths
among these used in this “ex vivo” study, probably due to their greatest affinity to water.
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