Temperature variation at soft periodontal and rat bone tissues during a medium-power diode laser exposure.
OBJECTIVE
The aim of this study was to evaluate temperature variation induced by a diode laser in periodontal repair.


BACKGROUND
A diode laser operating with medium power can constitute an alternative device for bacterial reduction at periodontal pockets. This procedure will probably avoid any kind of undesirable thermal damage to the irradiated tissues.


METHODS
The temperature variation induced by a 810-nm diode laser was investigated in an in vitro study, varying the soft tissue thickness, and in an in vivo study for soft periodontal and bone tissues. The laser powers used were 600 mW, 800 mW, 1.0 W, and 1.2 W, and the light was delivered by a 300-microm fiber.


RESULTS
The laser parameters and irradiation time used did not induce a temperature variation high enough to cause thermal irreversible damage to the periodontal tissues investigated.


CONCLUSIONS
This study contributes to the establishment of thermally safe working parameters of a diode medium power laser.
Fontana
Carla Raquel
CR
Instituto de Física de São Carlos-USP, São Carlos, SP, Brazil. cfontana@if.sc.usp.br
Kurachi
Cristina
C
Mendonça
Cleber Renato
CR
Bagnato
Vanderlei Salvador
VS
D000818:Animals; D001842:Bone and Bones / Q000528:radiation effects*; D028022:Low-Level Light Therapy; D008297:Male; D010514:Periodontal Pocket / Q000532:radiotherapy*; D051381:Rats; D017208:Rats, Wistar; D013696:Temperature