Evaluation the effects of Co2 laser on soft and hard tissues : in vitro study

الملخص EN

CO2 laser (10.6 μm) is the most often used laser in the oral surgery due to its high absorption by water of the oral tissues.

Several benefits of the use of CO2 laser have been reported for oral surgical procedures.

This study aims to evaluate the effect of CO2 laser on soft and hard oral tissues (in vitro study).

This study was done on fresh tissues from sheep’s head.

CO2Surgical Laser with different operation modes was used ; 0.2 mm spot size using different laser parameters on the tongue, and bone making holes, incisions and cutting.

The depths and widths of holes and incisions were measured using endodontic file under magnification.

The speed of incisions was calculated and the required time for cutting was measured using sport clock.

The depths of holes and incisions were increasing with increasing the power density and pulse duration from 90 μs to 1.7 ms in 100 μs increments and so in CW mode (for holes 2.5 mm at 15W, for incisions 6mm at 20W).

Also the diameter of holes was increasing with power (1.2 mm at 15W) .The required time for cutting was decreasing as the power increased (14.14 sec.

at 25W).

The use of CO2 laser can be considered practical, effective and easy to carry out holes, incisions, and cuttings.