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A comparative study on radiopacity of root canal sealers


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A comparative study on radiopacity of root canal sealers

Article information

Restor Dent Endod. 2009;34(1):61-68
Publication date (electronic) : 2009 January 31
doi : https://doi.org/10.5395/JKACD.2009.34.1.061
Tae-Min Kim1, Seo-Kyoung Kim2,4, In-Nam Hwang2,4, Yun-Chan Hwang2,4,5, Byung-Cheol Kang3,4, Suk-Ja Yoon3,4, Jae-Seo Lee3,4, Won-Mann Oh2,4,5
1School of Dentistry, Chonnam National University, Korea.
2Department of Conservative Dentistry, Chonnam National University, Korea.
3Department of Oral and Maxillofacial Radiology, Chonnam National University, Korea.
4Dental Science Research Institute, Chonnam National University, Korea.
5BK21, Chonnam National University, Korea.
Corresponding Author: Won-Mann Oh. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, Yongbong-ro 77, Buk-gu, Gwangju, 500-757, Korea. Tel :82-62-530-5572, Fax :82-62-530-5629, wmoh@chonnam.ac.kr
Received 2008 October 16; Revised 2009 January 02; Accepted 2009 January 09.

Abstract

This study was performed to assess the radiopacity of a variety of root canal sealers according to the specification concerning root canal sealers.

Ten materials including Tubli-Seal™, Kerr Pulp Canal Sealer™, AH 26®, AH plus®, AH plus jet™, Ad sea l™, Sealapex™, NOGENOL™, ZOB seal™, Epiphany™ and dentin were evaluated in this study. In the first part, densitometric reading of an each step of aluminum step wedge on occlusal film was performed at different voltage and exposure time. In the second part, ten specimens were radiographed simultaneously with an aluminum step wedges on the occlusal films under decided condition. The mean radiographic den sity values of the materials were transformed into radiopacity expressed equivalent thickness of aluminum (mm Al).

The following results were obtained.

1. Among the various conditions, the appropriate voltage and exposure time that meet the requirement density was 60 kVp at 0.2 s

2. All of the materials had greater radiopacity than 3 mm Al requirement of ANSI/ADA specification No. 57 (2000) and ISO No. 6876 (2001) standards.

3. The radiopacity of materials increased as thickness of materials increased.

4. The mm Al value of each specimen at 1mm in thickness has a significant difference in the statistics.

It suggests that root canal sealers have a sufficient radiopacity that meet the requirement.

Keywords: Radiopacity; Aluminum step wedge; Root canal sealer; Optic density; Equivalent thickness Aluminum

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Article information Continued

Copyright © 2009 The Korean Academy of Conservative Dentistry
(open-access) :

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Figure 1

Figure 1

A radiograph showing the radiopacities of each experimental material, dentin and its equivalence to those of the aluminum step wedge

Figure 2

Figure 2

Standard curve for the optical d ensity of the aluminum step wedge at 60 kVp, 0.2 s

Figure 3

Figure 3

Radiopacities expressed in mean equivalent aluminum thickness for experimental materials in comparison with dentin

Table 1

Mean values and standard deviations of the radiopacity values in the terms of equivalent thickness of aluminum for the experimental materials

Table 1