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Research Article
Effect of cooling water temperature on the temperature changes in pulp chamber and at handpiece head during high-speed tooth preparation
Ra'fat I. Farah
Restor Dent Endod 2019;44(1):e3.   Published online December 24, 2018
DOI: https://doi.org/10.5395/rde.2019.44.e3
AbstractAbstract PDFPubReaderePub
Objectives

It was the aim of this study to evaluate the effect of cooling water temperature on the temperature changes in the pulp chamber and at the handpiece head during high-speed tooth preparation using an electric handpiece.

Materials and Methods

Twenty-eight intact human molars received a standardized occlusal preparation for 60 seconds using a diamond bur in an electric handpiece, and one of four treatments were applied that varied in the temperature of cooling water applied (control, with no cooling water, 10°C, 23°C, and 35°C). The temperature changes in the pulp chamber and at the handpiece head were recorded using K-type thermocouples connected to a digital thermometer.

Results

The average temperature changes within the pulp chamber and at the handpiece head during preparation increased substantially when no cooling water was applied (6.8°C and 11.0°C, respectively), but decreased significantly when cooling water was added. The most substantial drop in temperature occurred with 10°C water (−16.3°C and −10.2ºC), but reductions were also seen at 23°C (−8.6°C and −4.9°C). With 35°C cooling water, temperatures increased slightly, but still remained lower than the no cooling water group (1.6°C and 6.7ºC).

Conclusions

The temperature changes in the pulp chamber and at the handpiece head were above harmful thresholds when tooth preparation was performed without cooling water. However, cooling water of all temperatures prevented harmful critical temperature changes even though water at 35°C raised temperatures slightly above baseline.

Citations

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  • The Effect of Water Coolant and Bur Type on Pulp Temperature When Removing Tooth Structure and Restorative Dental Materials
    C Mafrici, M Kingston, R Grice, PV Abbott
    Operative Dentistry.2024; 49(1): 91.     CrossRef
  • A Finite Element Method Study on a Simulation of the Thermal Behaviour of Four Methods for the Restoration of Class II Cavities
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  • Analysis of the Pulpal Blood Flow Microdynamics during Prosthetic Tooth Preparation Using Diamond Burs with Different Degrees of Wear
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  • Evaluation of the Pulp Chamber Temperature during Tooth Veneer Preparation Using Burs with Different Degrees of Wear—A Preliminary In Vitro Study
    Edmond Ciora, Mariana Miron, Daliana Bojoga, Diana Lungeanu, Anca Jivanescu
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  • Effect of spray air settings of speed-increasing contra-angle handpieces on intrapulpal temperatures, drilling times, and coolant spray pattern
    Edina Lempel, József Szalma
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    ADO Klinik Bilimler Dergisi.2022; 11(2): 140.     CrossRef
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    Physics of Fluids.2022;[Epub]     CrossRef
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    Dental Research Journal.2022; 19(1): 53.     CrossRef
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    Journal of Biomedical Materials Research Part B: Applied Biomaterials.2022; 110(4): 755.     CrossRef
  • In Vivo Pulp Temperature Changes During Class V Cavity Preparation and Resin Composite Restoration in Premolars
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Case Report
Endodontic treatment of a mandibular first molar with 8 canals: a case report
Ankit Arora, Shashi Rashmi Acharya, Padmaja Sharma
Restor Dent Endod 2015;40(1):75-78.   Published online October 13, 2014
DOI: https://doi.org/10.5395/rde.2015.40.1.75
AbstractAbstract PDFPubReaderePub

Presented here is a case where 8 canals were located in a mandibular first molar. A patient with continuing pain in mandibular left first molar even after completion of biomechanical preparation was referred by a dentist. Following basic laws of the pulp chamber floor anatomy, 8 canals were located in three steps with 4 canals in each root. In both of the roots, 4 separate canals commenced which joined into two canals and exited as two separate foramina. At 6 mon follow-up visit, the tooth was found to be asymptomatic and revealed normal radiographic periapical area. The case stresses on the fact that understanding the laws of pulp chamber anatomy and complying with them while attempting to locate additional canals can prevent missing canals.

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  • Determinants of the Number of Main Canals in a Tooth: Deciphering Potential Mechanisms
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    Universitas Odontologica.2023;[Epub]     CrossRef
  • Application Of Cone-Beam Computed Tomography In Diagnosis And Treatment Of Multiple Canals– A Case Report
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    Annals of Dental Specialty.2022; 10(2): 15.     CrossRef
  • Four distal root canals in a two-rooted permanent mandibular first molar
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    Endodontology.2022; 34(3): 212.     CrossRef
  • Utilizing Cone-Beam Computed Tomography for Identifying and Managing Multiple Canals: A Case Report
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    Journal of Current Research in Oral Surgery.2022; 2(1): 37.     CrossRef
  • Morphology and prevalence of middle canals in the mandibular molars: A systematic review
    Rashmi Bansal, Sapna Hegde, Madhusudan Astekar
    Journal of Oral and Maxillofacial Pathology.2018; 22(2): 216.     CrossRef
  • Endodontic management of a permanent mandibular first molar with unusual root canal configurations: Two case reports
    Mohammad Ahmad Alenezi, Mustafa Aldajani, Hind O. Al-Qathami, Seraj Al-Shommrani
    Saudi Endodontic Journal.2017; 7(3): 181.     CrossRef
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Original Articles
Changes in µ-TBS to pulp chamber dentin after the application of NaOCl & reversal effect by using sodium ascorbate
Su-Mi Kwon, Tae-Gun Kim, Mi-Kyung Yu, Kwang-Won Lee
J Korean Acad Conserv Dent 2009;34(6):515-525.   Published online November 30, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.6.515
AbstractAbstract PDFPubReaderePub

Clinical suggestion for the limitation of application time of NaOCl solution is needed to avoid large reductions in resin-dentin bond strength. The aim of this study was to measure the change of µ-tensile bond strength after the various application time of 5.25% NaOCl solution to pulp chamber dentin in endodontic access cavity, and to evaluate the effect of 10% sodium ascorbate application for 10 min on bond strength after the treatment of 5.25% NaOCl solution. In this experiment, there were no statistical differences(p>0.05) in bond strengths between upper chamber dentin and lower chamber dentin. NaOCl-treated group for 20 min did not show any significant decrease(p>0.05) in bond strength than non-treated control group. In contrast to that, bond strengths of NaOCl-treated groups for 40 & 80 min were significantly lower(p<0.05) than that of non-treated control group.

10% sodium ascorbate retreated group for 10 min after 5.25% NaOCl application for 40 min to chamber dentin showed the recovery of bond strength significantly. However, the bond strength of sodium ascorbate retreated group after 5.25% NaOCl application for 80 min was still significantly lower(p<0.05) compared to the non-treated control group, which means the reductions in resin-dentin bond strength were not fully reversed. On the contrary, sodium ascorbate retreated group after 5.25% NaOCl application for 5 min showed significantly higher(p<0.05) bond strength compared to the control group, which demonstrates its superior recovery effect. In SEM exminations of specimens retreated with 10% sodium ascorbate after NaOCl application for 40 & 80 min showed that resin tags were formed clearly and densely, but weakly in density and homogeneity of individual resin tag compared to the control specimen.

Citations

Citations to this article as recorded by  
  • Influence of Sodium Hypochorite & EDTA on the Microtensile Bond Strength of Ethanol Wet Bonding
    Deok-Joong Kim, Yong-Beom Song, Sang-Hee Park, Hyoung-Sun Kim, Hye-Yoon Lee, Mi-Kyung Yu, Kwang-Won Lee
    Journal of Dental Rehabilitation and Applied Science.2013; 29(1): 37.     CrossRef
  • 280 View
  • 1 Download
  • 1 Crossref
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The effect of concentration and application time of hydrogen peroxide on the microtensile bond strength of resin restorations to the dentin at different depths
Jeong-Lyong Son, Gye-Young Lee, Yu-Mi Kang, Young-Taek Oh, Kwang-Won Lee, Tae-Gun Kim
J Korean Acad Conserv Dent 2009;34(5):406-414.   Published online September 30, 2009
DOI: https://doi.org/10.5395/JKACD.2009.34.5.406
AbstractAbstract PDFPubReaderePub

The purpose of this study was to examine the effect of hydrogen peroxide at different application time and concentrations on the microtensile bond strength of resin restorations to the deep and the pulp chamber dentin.

A conventional endodontic access cavity was prepared in each tooth, and then the teeth were randomly divided into 1 control group and 4 experimental groups as follows: Group 1, non treated; Group 2, with 20% Hydrogen peroxide(H2O2); Group 3, with 10% H2O2; Group 4, with 5% H2O2; Group 5, with 2.5% H2O2; the teeth of all groups except group 1 were treated for 20, 10, and 5min. The treated teeth were filled using a Superbond C&B (Sun medical Co., Shiga, Japan). Thereafter, the specimens were stored in distilled water at 37℃ for 24-hours and then sectioned into the deep and the chamber dentin. The microtensile bond strength values of each group were analyzed by 3-way ANOVA and Tukey post hoc test(p < 0.05).

In this study, the microtensile bond strength of the deep dentin (D1) was significantly greater than that of the pulp chamber dentin (D2) in the all groups tested. The average of microtensile bond strength was decreased as the concentration and the application time of H2O2 were increased. Analysis showed significant correlation effect not only between the depth of the dentin and the concentration of H2O2 but also between the concentration of H2O2 and the application time(p < 0.05), while no significant difference existed among these three variables(p > 0.05). The higher H2O2 concentration, the more opened dentinal tubules under a scanning electron microscope(SEM) examination.

Citations

Citations to this article as recorded by  
  • Changes in µ-TBS to pulp chamber dentin after the application of NaOCl & reversal effect by using sodium ascorbate
    Su-Mi Kwon, Tae-Gun Kim, Mi-Kyung Yu, Kwang-Won Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(6): 515.     CrossRef
  • 313 View
  • 2 Download
  • 1 Crossref
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Influence of Sodium Ascorbate on Microtensile Bond Strengths to Pulp Chamber Dentin treated with NaOCl
Soo-Yeon Jeon, Kwang-Won Lee, Mi-Kyung Yu
J Korean Acad Conserv Dent 2008;33(6):545-552.   Published online November 30, 2008
DOI: https://doi.org/10.5395/JKACD.2008.33.6.545
AbstractAbstract PDFPubReaderePub

The purpose of this study was to evaluate the influence of sodium ascorbate on microtensile bond strengths of total-etching adhesive system to pulp chamber dentin treated with NaOCl.

Pulp chambers of extracted human non-caries permanent molars were treated as follows: group 1, with 0.9% NaCl; group 2, with 5.25% NaOCl; group 3, with 5.25% NaOCl and 10% sodium ascorbate for 1min; group 4, with 5.25% NaOCl and 10% sodium ascorbate for 1 min and 10ml of water; group 5, with 5.25% NaOCl and 10% sodium ascorbate for 5 min; group 6, with 5.25% NaOCl and 10% sodium ascorbate for 5 min and 10ml of water; group 7, with 5.25% NaOCl and 10% sodium ascorbate for 10 min; group 8, with 5.25% NaOCl and 10% sodium ascorbate for 10 min and 10ml of water. Treated specimens were dried, bonded with a total-etching adhesive system (Single bond), restored with a composite resin(Z250) and kept for 24h at 100% humidity to measure the microtensile bond strength.

NaOCl-treated group (group 2) demonstrated significantly lower strength than the other groups. No significant difference in microtensile bond strengths was found between NaCl-treated group (group 1) and sodium ascorbate-treated groups (group 3-8). The results of this study indicated that dentin treated with NaOCl reduced the microtensile bond strength of Single bond. Application of 10% sodium ascorbate restored the bond strength of Single bond on NaOCl-treated dentin. Application time of sodium ascorbate did not have a significant effect.

Citations

Citations to this article as recorded by  
  • Influence of Sodium Hypochorite & EDTA on the Microtensile Bond Strength of Ethanol Wet Bonding
    Deok-Joong Kim, Yong-Beom Song, Sang-Hee Park, Hyoung-Sun Kim, Hye-Yoon Lee, Mi-Kyung Yu, Kwang-Won Lee
    Journal of Dental Rehabilitation and Applied Science.2013; 29(1): 37.     CrossRef
  • Changes in µ-TBS to pulp chamber dentin after the application of NaOCl & reversal effect by using sodium ascorbate
    Su-Mi Kwon, Tae-Gun Kim, Mi-Kyung Yu, Kwang-Won Lee
    Journal of Korean Academy of Conservative Dentistry.2009; 34(6): 515.     CrossRef
  • 281 View
  • 0 Download
  • 2 Crossref
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