Tooth bleaching effect by light activation on the tooth surface and intra-pulpal temperature: an in vitro study (광활성 유무가 치아미백과 치아표면 및 치수 내 온도에 미치는 영향)

Shim, Youn-Soo (심연수); Hee-Sun Woo (우희선)

doi:10.13065/jksdh.2014.14.04.585

Tooth bleaching effect by light activation on the tooth surface and intra-pulpal temperature: an in vitro study

Journal of Korean society of Dental Hygiene
Abbr : J Korean Soc Dent Hyg
2014, 14(4), pp.585~591
DOI : 10.13065/jksdh.2014.14.04.585
Publisher : Korean Society of Dental Hygiene
Research Area : Medicine and Pharmacy > Dentistry

Shim, Youn-Soo ¹, Hee-Sun Woo ²

¹선문대학교
²수원여자대학교

Accredited

ABSTRACT

Objectives : The purpose of this study was to investigate of the color change, tooth surface and intra-pulpal temperature of tooth bleaching by light activationMethods : Forty-eight extracted bovine teeth were immersed into a tea solution for 24 hours. The specimens were randomly divided into four groups(n=15):(G1) 15% HP + without light activation, (G2) 15% HP + light activation, (G3) 25% HP + without light activation, (G4) 25% HP + light activation. All specimens were bleached for 15 minutes three times. The spectrophotometer (CM-2600d, Konica Minolta, Osaka, Japan) was used including before bleaching, immediately after bleaching, 1 week, 1 and 3 months after the end of bleaching. The temperature rise were measured in the pulpal chamber and tooth surface with a digital thermocouple thermometer(Termopar Digital Multimeter, Tektronix DMM916, USA). Between the tested time points, the specimens were stored in distilled water. The data were analyzed by ANOVA, t-test and Tukey’s post hoc test set at 0.05. Results : There was no significant color change by the use of light after the bleaching treatment(p>0.05). The dental bleaching treatments of teeth with 15% HP and 25% HP did not seem to be more effective when light source was used. There was no difference in color stability between groups within three month(p>0.05). There was an increase in tooth surface and pulp temperature, but it was not sufficient to cause damage to the pulp. Conclusions :The use of light activation has no obvious effective impact on the tooth bleaching effect.

KEYWORDS

intra-pulpal temperatures, light activation, tooth bleaching

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