Table 1.

Lasers sytems and parameters

Lasers	Parameters	Manufacturers
Diode (810 nm)	300 micron diameter fibre, a power of 0.2 W, continuous mode, 30 s.	(Cheese dental laser; Wuhan Gigaa Optronics Technology Co. Ltd., Wuhan, China)
Diode (980 nm)	300 micron diameter fibre, a power of 0.5 W, continuous mode, 60 s, T on at 100 ms and T off at 100 ms,	(Cheese dental laser; Wuhan Gigaa Optronics Technology Co. Ltd., Wuhan, China)
Er, Cr: YSGG	A Z6 sapphire tip, 6 mm length, 600 μm diameter, frequency 20 Hz, pulse width 140–200 µs, a power of 0.25 W, 60 s.	(Waterlase, Biolase Technology, Irvine, CA)
Er: YAG	A R02-handpiece, non-contact mode, a power of 0.2 W, energy per pulse 80 mJ/pulse, frequency 3 Hz, short pulse mode, 60 s	(Fotona Laser AT, Fidelis Plus III, Ljubljana, Slovenia)
Nd: YAG	A 300 μm Nd: YAG fibre, a power of 1 W, the frequency 10 Hz, short pulse mode, 60 s.	(Fotona Laser AT, Fidelis Plus III, Ljubljana, Slovenia)