Observations on fluid flow from exposed dentine in primary teeth: An in vitro study

© 2017 Objective To investigate fluid flow through dentine in primary teeth in vitro using the replica technique, and to compare the results with those obtained from permanent dentine. Design The experiments were carried out on 22 extracted, mandibular, primary, incisor teeth. The incisal edge was r...

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Main Authors: Monticha Rangcharoen, Varisara Sirimaharaj, Sitthichai Wanachantararak, Noppakun Vongsavan, Bruce Matthews
Format: Journal
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/56681
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-566812018-09-05T03:46:31Z Observations on fluid flow from exposed dentine in primary teeth: An in vitro study Monticha Rangcharoen Varisara Sirimaharaj Sitthichai Wanachantararak Noppakun Vongsavan Bruce Matthews Biochemistry, Genetics and Molecular Biology Dentistry Medicine © 2017 Objective To investigate fluid flow through dentine in primary teeth in vitro using the replica technique, and to compare the results with those obtained from permanent dentine. Design The experiments were carried out on 22 extracted, mandibular, primary, incisor teeth. The incisal edge was removed to 1 mm below the dentino-enamel junction and half the exposed surface etched with phosphoric acid. The exposed dentine was blotted dry and the pressure in the pulp cavity held at 0, 15, 30 or 45 cm H2O above atmospheric for 30 s. Fluid that accumulated on the dentine surface was recorded with impression material and a replica made with epoxy resin which was examined in a scanning electron microscope. Results Structures resembling fluid droplets were present in the replicas of unetched dentine in all 22 teeth, and at all the pulpal pressures tested. The droplets formed at 45 cm H2O were significantly larger (median diam., 5.14 mm; interquartile range, 3.26 mm; Friedman repeated measures analysis of variance on ranks (RMAVR) and Tukey test) than those formed at other pressures. There was no evidence of droplets in the replicas of etched dentine with any of the pulpal pressures. Conclusions These results demonstrate that fluid will tend to flow from dentine in deciduous teeth when it is exposed. They are similar to those obtained in a previous study in this laboratory on permanent teeth. The fact that fluid droplets were absent from etched dentine suggests that, after being blotted, the etched dentine matrix absorbed fluid that tended to flow out through the dentinal tubules. 2018-09-05T03:28:52Z 2018-09-05T03:28:52Z 2017-11-01 Journal 18791506 00039969 2-s2.0-85028723163 10.1016/j.archoralbio.2017.08.013 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028723163&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/56681
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Biochemistry, Genetics and Molecular Biology
Dentistry
Medicine
spellingShingle Biochemistry, Genetics and Molecular Biology
Dentistry
Medicine
Monticha Rangcharoen
Varisara Sirimaharaj
Sitthichai Wanachantararak
Noppakun Vongsavan
Bruce Matthews
Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
description © 2017 Objective To investigate fluid flow through dentine in primary teeth in vitro using the replica technique, and to compare the results with those obtained from permanent dentine. Design The experiments were carried out on 22 extracted, mandibular, primary, incisor teeth. The incisal edge was removed to 1 mm below the dentino-enamel junction and half the exposed surface etched with phosphoric acid. The exposed dentine was blotted dry and the pressure in the pulp cavity held at 0, 15, 30 or 45 cm H2O above atmospheric for 30 s. Fluid that accumulated on the dentine surface was recorded with impression material and a replica made with epoxy resin which was examined in a scanning electron microscope. Results Structures resembling fluid droplets were present in the replicas of unetched dentine in all 22 teeth, and at all the pulpal pressures tested. The droplets formed at 45 cm H2O were significantly larger (median diam., 5.14 mm; interquartile range, 3.26 mm; Friedman repeated measures analysis of variance on ranks (RMAVR) and Tukey test) than those formed at other pressures. There was no evidence of droplets in the replicas of etched dentine with any of the pulpal pressures. Conclusions These results demonstrate that fluid will tend to flow from dentine in deciduous teeth when it is exposed. They are similar to those obtained in a previous study in this laboratory on permanent teeth. The fact that fluid droplets were absent from etched dentine suggests that, after being blotted, the etched dentine matrix absorbed fluid that tended to flow out through the dentinal tubules.
format Journal
author Monticha Rangcharoen
Varisara Sirimaharaj
Sitthichai Wanachantararak
Noppakun Vongsavan
Bruce Matthews
author_facet Monticha Rangcharoen
Varisara Sirimaharaj
Sitthichai Wanachantararak
Noppakun Vongsavan
Bruce Matthews
author_sort Monticha Rangcharoen
title Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
title_short Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
title_full Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
title_fullStr Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
title_full_unstemmed Observations on fluid flow from exposed dentine in primary teeth: An in vitro study
title_sort observations on fluid flow from exposed dentine in primary teeth: an in vitro study
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85028723163&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/56681
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