Relationship between Large Tubules and Dentin Caries in Human Deciduous Tooth

Agematsu, Hiroko; Abe, Shinichi; Shiozaki, Kazunari; Usami, Akinobu; Ogata, Shigemitsu; Suzuki, Kazunari; Soejima, Masakazu; Ohnishi, Masaharu; Nonami, Kanzo; Ide, Yoshinobu

doi:10.2209/tdcpublication.46.7

Cited by 11 publications

(7 citation statements)

References 22 publications

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“…The behavior of dental tissue in response to thermal stimuli depends on the physiological characteristics of the tooth. Primary teeth have larger dentin tubule structures than those of permanent teeth, which increases the permeability of primary teeth and causes them to be more easily affected by external stimuli (5). Dentin and its geometric structure additionally play an important role in the increase of heat.…”

Section: Introductionmentioning

confidence: 99%

Temperature increases in primary teeth pulp chamber during polymerization of glass ionomer-based restorative materials

Büyükkok¹,

Kaptan²

2021

Eur Oral Res

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Purpose To evaluate the temperature changes in primary teeth pulp chambers of different dentin thicknesses during polymerization of four glass ionomer-based restorative materials. Materials and Methods Eighty extracted, caries-free, primary molars were prepared as standardized Class I occlusal cavities with dentin thicknesses of 1 mm and 2 mm. Four glass ionomerbased restorative materials, Dyract XP, Photac Fil Quick Aplicap, Fuji II LC, and GCP Glass Fill, were placed in the cavities and cured with two light-curing units. Temperature increases (initial temperature, 37°C) in the pulp chamber during polymerization were recorded by a J-type thermocouple in a pulpal microcirculation setup. The data were analyzed with Variance analyses and Tukey tests. Results The temperatures recorded in samples with dentin thicknesses of 1 mm and 2 mm exhibited statistically significant differences (p<0.05). The GCP Glass Fill group exhibited the highest temperature increases for both dentin thicknesses (p<0.05). The other groups were not statistically different but the Dyract XP group exhibited the least temperature change. Conclusion The highest temperature changes were observed for 1 mm dentin thickness. All temperature increases during polymerizations and setting reactions were lower than the corresponding critical values 5.5°C.

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Section: Introductionmentioning

confidence: 99%

Temperature increases in primary teeth pulp chamber during polymerization of glass ionomer-based restorative materials

Büyükkok¹,

Kaptan²

2021

Eur Oral Res

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“…In the present study, the penetration of viable S. mutans bacteria in dentinal tubules was found to be up to 95.9, 92.1, and 92.7 μm in group I; 116.3, 93.1, and 84.2 μm in group II; and 128.9, 138.7, and 131.8 μm in group III at 60, 120, and 180 seconds, respectively. Whereas Agematsu et al 24 reported that the oral bacteria can invade up to 250 μm from the open end in deciduous anterior teeth, while Sen et al 25 observed through scanning electron microscope (SEM), the depth of bacterial penetration into dentinal tubules of root canal ranged from 10 to 150 μm. This variation may be due to different study designs, and preparation of samples, as for SEM, dehydrated samples were used, whereas in our study, no dehydration of samples was done since laser scanning confocal microscopy (LSCM) allows the evaluation of samples without the need for dehydration and, thus, the true native morphology of teeth was preserved.…”

Section: Discussionmentioning

confidence: 99%

Efficacy of Liquorice and Propolis Extract Used as Cavity Cleaning Agents against Streptococcus mutans in Deciduous Molars Using Confocal Microscopy: An In Vitro Study

Mali¹,

Tyagi²,

Godbole³

et al. 2019

International Journal of Clinical Pediatric Dentistry

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Background/introductionCavity disinfection before restoration aids in reducing the number of residual bacteria, thus, decreasing the rate of secondary caries. Propolis, at low concentrations, inhibits the growth of cariogenic bacteria. Liquorice roots are known to have antimicrobial, anti-inflammatory, and antioxidant properties.Aim and objectivesEvaluation and comparison of antimicrobial efficacy of liquorice and propolis extract gels used as cavity cleaning agents against Streptococcus mutans in deciduous molars by confocal laser scanning microscopy (in vitro study).Materials and methodsLiquorice and propolis extracts were converted into gels after recording the minimum inhibition concentration. Class I cavity was prepared on 135 extracted deciduous molars and subjected to inoculation with S. mutans. Teeth were randomly divided into groups I, II, and III which were treated with gels of liquorice, propolis, and distilled water, respectively, for 60, 120, and 180 seconds each. Specimens were sectioned and stained with fluorescent dyes and observed under a confocal laser scanning microscopy (CLSM). The data obtained were statistically evaluated.ResultsThe mean nonviable/viable bacterial count and the depth of penetration were found to be maximum in group I and minimum in group III. A statistically significant difference was found to be between groups I and II and groups I and III, while with groups II and III, it was nonsignificant at all 60, 120, and 180 seconds. The bacterial depth penetration between groups I and II at 180 seconds was nonsignificant.Conclusion and clinical significanceThough liquorice showed better antimicrobial potential as compared to propolis extract, both can be used efficiently as cavity disinfectants.How to cite this articleGodbole E, Tyagi S, et al. Efficacy of Liquorice and Propolis Extract Used as Cavity Cleaning Agents against Streptococcus mutans in Deciduous Molars Using Confocal Microscopy: An In Vitro Study. Int J Clin Pediatr Dent 2019;12(3):194–200.

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“…12 Although primary teeth have dentin with a lower degree of mineralization compared to permanent teeth dentin, 13 larger dentinal tubular structures of the primary teeth than those of the permanent teeth may increase the permeability of primary teeth and make them more susceptible to thermal stimuli. 14 Therefore, there was a need to conduct studies on primary teeth due to the inability to rely on the results of studies conducted on permanent teeth.…”

Section: Introductionmentioning

confidence: 99%

Effect of light curing modes of high-powered LEDs on temperature rise under primary teeth dentin (an in vitro study)

Jabbour¹,

Alfares²

2022

Preprint

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Background. Temperature rise in the pulp chamber is a severe stress that can cause irreversible damage to the pulp. This study aimed to evaluate the effect of three curing modes of a high-powered LED and two remining dentin thicknesses on the temperature rise under primary teeth dentin. Methods. One dentin disc of 1 mm thickness was prepared from human primary molar. The dentin disc was exposed to curing light using a high-powered LED for 10 s to simulate bonding agent polymerization (stage 1 curing). Five specimens of resin composite were cured for 20 s. The different modes tested were standard, ramp, and pulse mode (n = 5). After that, the dentin disc was adapted to 0.5 mm thick, and the experiments were repeated. Temperature change data were subjected to analysis of variance (ANOVA) and Tukey's test. Results. The highest temperature rise was observed under the 0.5-mm-thick dentin disc with standard mode (7.6 ± 0.2; 4.7 ± 0.4), whereas the lowest values were recorded with pulse mode under 1-mm-thick dentin (2.7 ± 0.1; 2.5 ± 0.2) during stage 1 curing and resin composite polymerization, respectively. Pulse mode produced significantly lower values than standard mode in all conditions (P < 0.05). An inverse proportion was found between the mean temperature rise values and the dentin thickness. Conclusions. High-powered LEDs should not be used to cure bonding agents in deep cavities. The maximum temperature rise induced by a high-powered LED during resin composite polymerization was not critical for pulpal health. Temperature rise related to dentin thickness and curing modes.

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Relationship between Large Tubules and Dentin Caries in Human Deciduous Tooth

Cited by 11 publications

References 22 publications

Temperature increases in primary teeth pulp chamber during polymerization of glass ionomer-based restorative materials

Temperature increases in primary teeth pulp chamber during polymerization of glass ionomer-based restorative materials

Efficacy of Liquorice and Propolis Extract Used as Cavity Cleaning Agents against Streptococcus mutans in Deciduous Molars Using Confocal Microscopy: An In Vitro Study

Effect of light curing modes of high-powered LEDs on temperature rise under primary teeth dentin (an in vitro study)

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