Temperature rise during photo-activated disinfection of root canals.
The aim of this study was to determine whether it is safe to use photo-activated disinfection (PAD) during root canal treatment without heating the periodontal tissues. Root canals of 30 freshly extracted single-rooted teeth were prepared using ProFiles up to size ISO 40 and then filled with photo-sensitiser: tolonium blue (1.2 mg/l). The 635 nm diode laser was used with the manufacturer's endo-tip. Samples were irradiated for 150 s (output power 100 mW, approximate energy density 106.16 J/cm(2)). Temperatures were recorded at working length on the external root surface. After 150 s of PAD irradiation, the average temperature rise was 0.16 +/- 0.08 degrees C. All values were lower than the 7 degrees C safety level for periodontal injury. It was concluded that, regarding the temperature increase, the use of PAD in root canals could be considered harmless for periodontal tissues.
Dickers
B
B
Department of Dental Sciences, Polyclinique Brull, Faculty of Medicine, University of Liege, Quai Godfroid Kurth, Liege, Belgium.
Lamard
L
L
Peremans
A
A
Geerts
S
S
Lamy
M
M
Limme
M
M
Rompen
E
E
De Moor
R J G
RJ
Mahler
P
P
Rocca
J P
JP
Nammour
S
S
D003786:Dental Pulp Cavity / Q000528:radiation effects*; D004203:Disinfection / Q000379:methods*; D006801:Humans; D066298:In Vitro Techniques; D007834:Lasers; D017319:Photosensitizing Agents / Q000494:pharmacology; D013696:Temperature
D017319:Photosensitizing Agents