Thermal Conductivity and Diffusivity of Human Enamel and Dentin Measured by the Laser Flash Method

Soori, Ahmad; Soori, Faezeh; Kowsary, Farshad; Kasraei, Shahin

doi:10.1007/s10765-022-03083-0

Cited by 5 publications

(3 citation statements)

References 30 publications

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“…It must also be taken into account that the thickness of the dentin layer, left after dental preparation, can influence the density of the dentinal tubules. These anatomical attributes of teeth exhibit considerable diversity, not only within a single tooth but also for different teeth [ 37 , 38 , 39 , 40 , 41 ].…”

Section: Discussionmentioning

confidence: 99%

Evaluation of the Pulp Chamber Temperature during Tooth Veneer Preparation Using Burs with Different Degrees of Wear—A Preliminary In Vitro Study

et al. 2023

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The heat produced during tooth preparation could be a source of damage for dental pulp, and many variables are involved in this process. The aim of this in vitro study was to evaluate whether the different degrees of wear of the diamond burs significantly influenced the temperature changes in the pulp chamber during tangential veneer preparation. The sample comprised 30 intact permanent monoradicular teeth, randomly assigned to three study groups of 10 teeth each, of which 5 had the pulp tissue preserved and 5 had thermoconductive paste in the pulp chamber. For prosthetic preparation, we used new burs in the first group, burs at their fifth use in the second group, and burs at their eighth use for the third group. The pulp chamber temperature was evaluated at the start, after one minute, and after three minutes of preparation, using a k-type thermocouple. The results of the three-way ANOVA and Tukey post hoc comparisons showed a highly significant effect of the time of measurement, while the pulp condition and the degree of wear of the burs had no effect. In conclusion, the different degrees of wear of conventional diamond burs do not produce statistically significant different changes in the pulp chamber temperature.

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Section: Discussionmentioning

confidence: 99%

Evaluation of the Pulp Chamber Temperature during Tooth Veneer Preparation Using Burs with Different Degrees of Wear—A Preliminary In Vitro Study

et al. 2023

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“…The mineralization, the thickness of dentine and enamel and even the thermal properties differ significantly among different teeth including gender, age, ethnicity, and between human deciduous and permanent teeth (Lancaster et al, 2017 ; Magalhães et al, 2008 ; Soori et al, 2022 ; Stroud et al, 1994 ; Wilson & Beynon, 1989 ). Therefore, this study utilized two plastic mandibular first molars as the abutment teeth for testing to eliminate experimental error.…”

Section: Methodsmentioning

confidence: 99%

The impact of different polishing systems on yttria‐stabilized tetragonal zirconia polycrystalline crowns in relation to heat generation

Liu,

Aarts,

et al. 2023

Clinical & Exp Dental Res

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ObjectivesTo investigate the heat generation on yttria‐stabilized tetragonal zirconia polycrystalline (Y‐TZP) crowns during polishing with coarse and fine polishing systems at various speeds.Materials and MethodsTwo polishers (coarse and fine) at three polishing speeds were investigated. Two simulation models of the first mandibular molars were prepared for full coverage Y‐TZP restorations with different reduction dimensions. Preheated water was pumped into the abutment chamber, to simulate the intrapulpal temperature and blood flow. Twelve Y‐TZP crowns (3M™ Lava™ Esthetic) were milled for each prepared tooth abutment and each cusp (n = 10) was individually ground for 30 s and polished for 2 min. Thermocouple wire was secured to the intaglio surface of the crown and linked to a data logger for recording temperature changes. Selected scanning electron microscopy (SEM) images of the treated surfaces and polishers were analyzed. The data was statistically analyzed using Prism 9.ResultsThe highest temperature rise was observed in the 20,000 RPM polishing speed groups for both coarse and fine polishing, and higher than the threshold value of 5.5°C for pulp damage. The Kruskal–Wallis test, revealed statistically significant differences (p < .0001) in heat generation between low (10,000 RPM) and high (20,000 RPM) polishing speeds.ConclusionsHigh‐speed polishing at 20,000 RPM generated the most heat over the threshold of 5.5°C, which would threaten the dental pulp. The results suggest that a cautionary approach should be taken to high‐speed intraoral polishing.Clinical RelevanceDental clinicians should be aware of the choice of polishing systems and speeds to avoid pulp damage from intraoral polishing of Y‐TZP restorations.

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“…IR thermometers show the temperature as a function of emissivity, and if the surface emissivity is correctly determined, the temperature is also correctly displayed. The emissivity and other thermal properties of the dentin disc were obtained from the results of previous studies [31][32][33].…”

Section: Temperature Measurementmentioning

confidence: 99%

Determination of Temperature Rise and Heating Rate of Curing Modes of Two Different Dental Light-Curing Units: The Importance of Heating Rate

Soori

Kowsary

et al. 2022

Preprint

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The heat generated in the process of light-curing may cause irreversible damage to the dental pulp. This study aimed to assess heat transfer in the process of irradiation of a dentin disc by using different modes of quartz-tungsten halogen (QTH) and light-emitting diode (LED) dental curing units. The surface temperature was measured by an infrared (IR) thermometer following light-curing with standard, ramp, boost, and bleaching modes of a QTH curing unit, and high, soft and pulse modes of a LED curing unit. Since the maximum temperature rise alone is not sufficient to study the thermal damage to the pulp tissue, we also assessed the temperature rise profile and heating rate, in addition to the maximum temperature rise in this study. The results showed that decreasing the duration of light-curing effectively decreased the risk of pulpal damage. Shorter radiation modes such as the 10 s standard mode, and the 10 s boost curing mode of the QTH curing unit and the 5 s high mode, and the 10 s pulse mode of the LED curing unit all had the lowest risk of thermal damage to the pulp.

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Thermal Conductivity and Diffusivity of Human Enamel and Dentin Measured by the Laser Flash Method

Cited by 5 publications

References 30 publications

Evaluation of the Pulp Chamber Temperature during Tooth Veneer Preparation Using Burs with Different Degrees of Wear—A Preliminary In Vitro Study

Evaluation of the Pulp Chamber Temperature during Tooth Veneer Preparation Using Burs with Different Degrees of Wear—A Preliminary In Vitro Study

The impact of different polishing systems on yttria‐stabilized tetragonal zirconia polycrystalline crowns in relation to heat generation

Determination of Temperature Rise and Heating Rate of Curing Modes of Two Different Dental Light-Curing Units: The Importance of Heating Rate

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