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Pregled bibliografske jedinice broj: 667933

Optical Effects of Experimental Light-Activated Bleaching Procedures

Klarić, Eva; Rakić, Mario; Marciuš, Marijan; Ristić, Mira; Sever, Ivan; Tarle, Zrinka
Optical Effects of Experimental Light-Activated Bleaching Procedures // Photomedicine and laser surgery, 32 (2014), 3; 160-167 doi:10.1089/pho.2013.3658 (međunarodna recenzija, članak, znanstveni)

Optical Effects of Experimental Light-Activated Bleaching Procedures

Klarić, Eva ; Rakić, Mario ; Marciuš, Marijan ; Ristić, Mira ; Sever, Ivan ; Tarle, Zrinka

Photomedicine and laser surgery (1549-5418) 32 (2014), 3; 160-167

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Light; tooth bleaching; photostimulation; color

The purpose of this study was to evaluate the efficiency of experimental light-activated bleaching procedures. The improved color effect may be attributed to the potential photochemical effect of light-emitting diode (LED405), organic LED (OLED), and femtosecond laser rather than to the photothermal effect of conventional lights used for tooth bleaching. Specially made pastilles of hydroxylapatite were immersed in green tea for 8 h and randomly divided into four groups (n=50) specified by the type of light source applied during a 30 min bleaching treatment: LED405, OLED, and femtosecond laser, or its absence (control group). Each group was treated with five bleaching gels: 10%, 16%, and 30% carbamide peroxide (CP), and 25% and 38% hydrogen peroxide (HP). Changes in color were determined by red–green–blue (RGB) colorimeter and ultraviolet-visible–near-infrared (UV/Vis/NIR) spectroscopy. Regardless of the applied bleaching gel, LED405 produced a larger increase in the value of RGB index than did OLED and bleaching without light activation (p<0.05). Femtosecond laser also produced significantly better results in combination with 16% CP and 38% HP. Furthermore, application of a bleaching agent with a higher concentration of peroxide boosted the value of the RGB index. Spectroscopic measurements revealed similar results, although treatments with OLED were rated relatively better than in RGB analysis. The mechanisms of light-activated bleaching procedures had a significant effect on the color change. The bleaching activation with LED405 and higher concentrations of peroxide in bleaching agents promoted better whitening effect.

Izvorni jezik

Znanstvena područja
Fizika, Kemija, Dentalna medicina


Projekt / tema
065-0352851-0410 - Nanostruktura restaurativnih materijala i interakcije s tvrdim zubnim tkivima (Zrinka Tarle, )
098-0982904-2952 - Sinteza i mikrostruktura metalnih oksida i oksidnih stakala (Mira Ristić, )

Institut za fiziku, Zagreb,
Stomatološki fakultet, Zagreb,
Institut "Ruđer Bošković", Zagreb,
Institut za turizam, Zagreb

Časopis indeksira:

  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus