Browsing by Author "Supachai Sutimuntanakul"

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    A Comparison of 3 Quantitative Radiographic Measurement Methods for Root Development Measurement in Regenerative Endodontic Procedures
    (2018-11-01) Nithinun Sutam; Jeeraphat Jantarat; Lalida Ongchavalit; Supachai Sutimuntanakul; Kenneth M. Hargreaves; University of Texas Health Science Center at San Antonio; Mahidol University
    © 2018 American Association of Endodontists Introduction: The outcomes of an immature tooth with necrotic pulp treated with regenerative endodontic procedures (REPs) were assessed clinically and radiographically. Root maturation is an important outcome of REPs, and several radiographic measurement methods have been used to measure this. The aim of this study was to compare radiographic measurement methods, measuring root maturation in immature teeth with necrotic pulp treated with REPs. Methods: Seventy-one radiographic images of REP cases were measured and compared using 3 radiographic measurement methods described by Bose et al (2009), Alobaid et al (2014), and Flake et al (2014). The intraclass correlation coefficient values were evaluated using the intra- and interobserver reliability test and the effect of the stage of root development. Results: The intra- and interobserver reliability for Alobaid et al's method and Flake et al's method were slightly higher than Bose et al's method as quantified by the intraclass correlation coefficient without a significant difference (P >.05). The stage of root development did not affect the reliability of the measurement methods. A high level of agreement was found among the 3 stages of root development for all 3 quantitative radiographic measurement methods. Conclusions: All 3 quantitative radiographic measurement methods exhibited high agreement regarding reliability. The stage of root development did not have an impact on the reliability of the measurement methods.
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    Efficacy of grapefruit, tangerine, lime, and lemon oils as solvents for softening gutta-percha in root canal retreatment procedures.
    (2013-02-01) Jeeraphat Jantarat; Warunee Malhotra; Supachai Sutimuntanakul; Mahidol University
    In the present study, we evaluate the efficiency of four kinds of oil as solvents for softening gutta-percha in root canal retreatment procedures. The performance of grapefruit, tangerine, lime, and lemon oils specifically were evaluated and compared to chloroform. Eighty-four cylinder-shaped glass tubes (5 × 30 mm) were filled with gutta-percha. A total of 0.1 mL solvent was added to the upper part of the glass tubes. After 5 min, the spreader attached to the universal testing machine was moved downward through gutta-percha with header speed of 5 mm/min into a depth of 5 mm. An initial depth of spreader penetration without force produced was recorded in millimeters. The load used to penetrate the spreader into the 5-mm depth was recorded in Newton. The results of the surface-dissolving depth and maximum force used to penetrate the spreader to 5 mm revealed that chloroform was significantly the best solvent in softening gutta-percha (P < 0.05), followed by grapefruit oil and tangerine oil, while the least effective solvents were lime oil and lemon oil. Under the conditions of the present study, grapefruit oil and tangerine oil performed best as gutta-perch solvents among four natural oils. © 2013 Wiley Publishing Asia Pty Ltd.
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    Pulpal responses after direct pulp capping with two calcium-silicate cements in a rat model
    (2019-01-01) Panruethai Trongkij; Supachai Sutimuntanakul; Puangwan Lapthanasupkul; Chitpol Chaimanakarn; Rebecca H. Wong; Danuchit Banomyong; Melbourne Dental School; Mahidol University
    © 2019, Japanese Society for Dental Materials and Devices. All rights reserved. Bioactivity of Bio-MA, a calcium chloride accerelator-containing calcium-silicate cement, as a pulp capping material was evaluated on mechanically exposed rat molar pulp. Sixty maxillary first molars from Wistar rats were mechanically exposed and assigned to two capping materials: Bio-MA or white mineral trioxide aggregate (WMTA), and three periods: 1, 7, or 30 days. Nine molars were exposed and covered with polytetrafluoroethylene tape, as positive controls. From histological examination, inflammatory cell infiltration and reparative dentin formation were evaluated using grading scores. No significant difference in pulpal responses between the two materials was observed at any period (p>0.05). At 1 day, all experimental groups showed localized mild inflammation. At 7 days, dentin bridge was partially observed at exposure sites with few inflammatory cells. At 30 days, pulp appeared normal with complete tubular dentin bridges. Bio-MA with accerelator was biocompatible similar to WMTA and could be used as a pulp-capping material.
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    Retrograde seal in ultrasonically prepared canals
    (2000-01-01) Supachai Sutimuntanakul; Wichai Worayoskowit; Chutima Mangkornkarn; Department of Operative Dentistry; Mahidol University
    The sealing ability of various retrofilling materials was compared. The root canals of 85 single-rooted teeth were cleansed and obturated with gutta-percha without sealer using lateral condensation. The apical 3 mm of the roots were resected and divided into positive control, negative control, and five experimental groups. The experimental teeth received root-end cavity preparation to 3 mm depth using an ultrasonic retroprep tip. The retrocavities were dried and divided into five groups to receive the following materials: amalgam with varnish, amalgam with Clearfil Liner Bond II, thermoplasticized gutta-percha (TGP) with sealer, Ketac-fil, and Super-EBA. After immersion in India ink for 7 days, the roots were demineralized, cleared, and evaluated for dye leakage under a stereomicroscope. Statistical analysis showed that Super-EBA, Ketacfil, and TGP with sealer demonstrated less leakage than amalgam with varnish and amalgam with Clearfil Liner Bond II (p < 0.05). Super-EBA also leaked significantly less than Ketac-fil or TGP sealer (p < 0.05). No significant difference was found between Ketac-fil and TGP or between the two groups filled with amalgam (p > 0.05). Copyright © 2000 by The American Association of Endodontists.
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    Tooth discoloration by 3Mix-MP as intracanal medication / Alouna Vilaylack
    (Mahidol University. Mahidol University Library and Knowledge Center, 2011) Alouna Vilaylack; Jeeraphat Jantarat; Supachai Sutimuntanakul; Mansuang Arksornnukit