In vitro pulp chamber temperature rises associated with the argon laser polymerization of composite resin

Objectives: Evaluate of the heated air jet temperature (T) in the pulp chamber on cavity 5 depths and photoactivation stages for a bulk fill resin restorative protocol is evaluated. Methods: Class I cavity preparations were conducted at different depths (n = 8) through two protocols for adhesive volatilization (23 °C and 40 °C) and cavities were restored with the Filtek Bulk Fill resin. The pulp chamber temperature variation was evaluated at four steps (times) during the restorative protocol: I (initial), V (after volatilization), A (after photoactivation of the adhesive), and C (after photoactivation of the composite resin). To verify the assumptions of the normality of the errors and homoscedasticity, the Shapiro Wilk and Levene tests were conducted. Subsequently, two-way and three-way analysis of variance was carried out, followed by Tukey's post-hoc analysis (α = 0.05). Results: The maximum T at the different restorative steps, regardless of the volatilization protocol and cavity depth, was as follows: I (36.8 °C) = V (36.9 ºC) < A (37.2 °C) = R (37.8 ºC) (p <0.05). During V, a small greater variation was observed in pulp chamber temperature when dentin was volatilized at 40 °C (p <0.05) at very deep cavity depths (0.31 °C). The largest temperature variations (p <0.05) were observed during A (0.17–0.59 °C) and R (0.50–1.06 °C), reaching peak temperatures in the cavities.

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Pulp chamber temperature changes during orthodontic bonding – an in vitro study

Australasian Orthodontic Journal ◽

10.21307/aoj-2021.017 ◽

2021 ◽

Vol 37 (2) ◽

pp. 157-164

Author(s):

Aysegul Ayhan Bani ◽

Burcu Balos Tuncer ◽

Cumhur Tuncer

Keyword(s):

In Vitro Study ◽

Vitro Study ◽

Pulp Chamber ◽

Temperature Changes ◽

Chamber Temperature ◽

Orthodontic Bonding

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The effect of laser-activated bleaching with 445 nm and 970 nm diode lasers on pulp chamber temperature rise: an in vitro study

Laser Physics ◽

10.1088/1555-6611/abece0 ◽

2021 ◽

Vol 31 (5) ◽

pp. 055601

Author(s):

Sogol Saberi ◽

Sima Shahabi ◽

Saba Tohidkhah ◽

Shiva Jafarnia ◽

Parham Pedram

Keyword(s):

Temperature Rise ◽

Diode Lasers ◽

In Vitro Study ◽

Vitro Study ◽

Pulp Chamber ◽

Chamber Temperature

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Evaluation of Rise in Pulp Chamber Temperature after Activation with Different Curing Lights on Bleached Teeth–An In Vitro Study

Dental Journal of Advance Studies ◽

10.1055/s-0040-1713693 ◽

2020 ◽

Vol 8 (03) ◽

pp. 080-083

Author(s):

Aditya Bansal ◽

Yogesh Kumar ◽

Neetu Jindal ◽

Renu Aggarwal ◽

Somya Jain

Keyword(s):

Diode Laser ◽

In Vitro Study ◽

Vitro Study ◽

Infrared Light ◽

Tooth Surface ◽

Plasma Arc ◽

Pulp Chamber ◽

Infrared Thermometer ◽

Chamber Temperature

Abstract Introduction The aim of the study was to evaluate rise in pulp chamber temperature after activation with different curing lights on bleached teeth in an in vitro study. The present study is an in vitro study with a sample size of 100. A total of 100 human extracted maxillary central and lateral incisors were collected and then randomly assigned into one control group and four experimental groups (n = 20). Material and Methods As many as 100 freshly extracted noncarious human maxillary central and lateral incisor teeth were used in this study. The access opening of all 100 samples were done to facilitate access to the pulp chambers for measuring the temperature. The samples were embedded into the additional silicone model, and uniform distance of 5 mm from tooth surface was taken for gel activation using different curing lights (LED, QTH, plasma arc, diode laser). The temperature inside the pulp chamber was measured using digital infrared thermometer. Infrared light of infrared thermometer was put on pulp chamber before the bleaching gel application (T0) 1 minute after bleaching gel application (T1). Later, there was changing of color of bleaching gel from dark red into green color when activated with different curing lights (T2). Statistical Analysis The temperature data obtained were analyzed statistically by one-way ANOVA and posthoc Tukey’s tests. Significance level was set at 5% for all analyses. Results The mean and standard deviation (SD) values of rise in pulp chamber temperature after activation with different light sources were Group II (LED) 0.5 ± 0.466, Group III (QTH) 0.775 ± 0.229, Group IV (plasma arc) 1.26 ± 0.690, and Group V (diode laser) 1.355 ± 0.452. Conclusion Compared with other light-curing units, LED group induced lowest rise in pulp chamber temperature. Whereas, bleaching without light activation does not induce rise in pulp chamber temperature.

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