, Volume 24, Issue 1, pp 81-85
Date: 12 Dec 2007

Temperature rise during photo-activated disinfection of root canals

Rent the article at a discount

Rent now

* Final gross prices may vary according to local VAT.

Get Access


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/cm2). 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°C. All values were lower than the 7°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.