[Thermographic assessment of thermal effects of Er:YAG laser in periodontal surgery].
OBJECTIVE
An assessment of thermal effect of Er:YAG laser (KEYII, KaVo) on oral soft tissues in select procedures.


METHODS
Experimental researches were carried out on Wistar rats. To measure the temperature changes the thermal imaging camera (ThermaCAM SC3000, FLIR Systems) was used.


RESULTS
There has been a significant increase of temperature observed on the end of optical fibre: the mean temperature ranged from 270 to 360 degrees C (at laser energy of 100 mJ and repetition rate of 25 Hz) and from 230 to 290 degrees C (300 mJ, 15 Hz). On the surface of oral mucosa thermal changes at the time of laser frenulectomy was analysed along the line of incision. The temperature above 50 degrees C was recorded on the length of 2 mm (at 100 mJ) and 3 mm (at 300 mJ). The temperature maintained on this level for about 0.4 s. On the surface of tongue during lingual mucosa excision the temperature above 40 degrees C was observed on the length of 1.6 mm (80 mJ, 2 Hz) or 2.5 mm (160 mJ, 2 Hz). The rate of cooling for both cases was lower than 0.5 s.


CONCLUSIONS
To prevent undesirable thermal side effects from an Er:YAG laser optical fibre should be moved very fluently in non-contact mode.
Zmuda
Stanisław
S
Wojskowy Instytut Medyczny w Warszawie, Pracownia Periodontologiczna CSK MON.
Ignatowicz
Elzbieta
E
Stankiewicz
Justyna
J
Marczyńiska-Stolarek
Magdalena
M
Dabrowski
Mirosław
M
D000818:Animals; D053685:Laser Therapy / Q000379:methods*; D009061:Mouth Mucosa / Q000601:surgery; D019647:Oral Surgical Procedures / Q000379:methods*; D010517:Periodontics / Q000379:methods*; D051381:Rats; D017208:Rats, Wistar; D013817:Thermography / Q000295:instrumentation / Q000379:methods*