A comparative study on radiopacity of root canal sealers

Tae-Min Kim; Seo-Kyoung Kim; In-Nam Hwang; Yun-Chan Hwang; Byung-Cheol Kang; Suk-Ja Yoon; Jae-Seo Lee; Won-Mann Oh

doi:10.5395/JKACD.2009.34.1.061

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Kim, Kim, Hwang, Hwang, Kang, Yoon, Lee, and Oh: A comparative study on radiopacity of root canal sealers

Original Article

Journal of Korean Academy of Conservative Dentistry

Journal of Korean Academy of Conservative Dentistry 2009; 34(1): 61-68.

Published online: 31 January 2009

DOI: https://doi.org/10.5395/JKACD.2009.34.1.061

A comparative study on radiopacity of root canal sealers

Tae-Min Kim¹, Seo-Kyoung Kim^2,⁴, In-Nam Hwang^2,⁴, Yun-Chan Hwang^2,^4,⁵, Byung-Cheol Kang^3,⁴, Suk-Ja Yoon^3,⁴, Jae-Seo Lee^3,⁴, Won-Mann Oh^2,^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 16 October 2008 Revised 2 January 2009 Accepted 9 January 2009

(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.

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

Figures and Tables

Figure 1

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

Figure 2

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

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

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