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HOME > Restor Dent Endod > Volume 30(6); 2005 > Article
Original Article Coincidence between radiographs and clearing samples on the root canal systems of single rooted premolars
Ho-Keel Hwang, Ho-Min Kang, Kang Seo
2005;30(6):-469.
DOI: https://doi.org/10.5395/JKACD.2005.30.6.461
Published online: November 30, 2005

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Corresponding Author: Ho-Keel Hwang. Department of Conservative Dentistry, College of Dentistry, Chosun University, 375 Seosuk-dong, Dong-gu, Gwangju, Korea, 501-759. Tel: 82-62-220-3846, Fax: 82-62-232-9064, rootcanal@hanmail.net
• Received: June 26, 2005   • Revised: August 25, 2005   • Accepted: September 1, 2005

Copyright © 2005 Korean Academy of Conservative Dentistry

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  • The aim of this study was to compare the root canal systems of maxillary and mandibular premolars that had a single root using radiographs and clearing samples. 142 single rooted premolars were selected and mesio-distal and bucco-lingual views were radiographed using intra-oral dental standard films. Four equally trained examiners classify the root canal types from the developed radiographs. After opening the tooth for access, it was stored in 5% NaOCl to dissolve the pulp tissue. Indian ink was then injected into the pulp cavity to stain the pulp tissue. It was cleared in methyl salicylate after being decalcified with 5% nitric acid for 48 hours, and the root canal type was evaluated at a magnification of × 20 using a stereomicroscope.
    The results are as follows;
    There were statistically significant differences between the radiographs and clearing samples of the root canal types among examiners (p < 0.05). There might be differences in the root canal types among examiners when the same radiograph is used. Therefore, considering the difficulty in estimating the root canal types, clinicians need to be careful when interpreting radiographs before root canal therapy.
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Figure 1
A paralleling device.
jkacd-30-461-g001.jpg
Figure 2
A double exposed radiograph.
jkacd-30-461-g002.jpg
Figure 3
Classification of root canal types on radiographs.
jkacd-30-461-g003.jpg
Figure 4
Classification of root canal types on clearing samples.
jkacd-30-461-g004.jpg
Table 1
Root canal types by interpreted radiographs (%)

*: Significantly different at p < 0.05 (χ2 test)

jkacd-30-461-i001.jpg
Table 2
A comparison of root canal types between radiographs and clearing samples

*: Significantly different at p < 0.05 (χ2 test)

jkacd-30-461-i002.jpg
Table 3
Coincidence of root canal types between radiographs and clearing samples (%)
jkacd-30-461-i003.jpg
Table 4
Coincidence according to the root canal types (%)

○: Correct, ×: Incorrect

jkacd-30-461-i004.jpg
Table 5
Coincidence ratio among examiners
jkacd-30-461-i005.jpg

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        • Citation for the content below
        Coincidence between radiographs and clearing samples on the root canal systems of single rooted premolars
        J Korean Acad Conserv Dent. 2005;30(6):461-469.   Published online November 30, 2005
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      Coincidence between radiographs and clearing samples on the root canal systems of single rooted premolars
      Image Image Image Image
      Figure 1 A paralleling device.
      Figure 2 A double exposed radiograph.
      Figure 3 Classification of root canal types on radiographs.
      Figure 4 Classification of root canal types on clearing samples.
      Coincidence between radiographs and clearing samples on the root canal systems of single rooted premolars

      Root canal types by interpreted radiographs (%)

      *: Significantly different at p < 0.05 (χ2 test)

      A comparison of root canal types between radiographs and clearing samples

      *: Significantly different at p < 0.05 (χ2 test)

      Coincidence of root canal types between radiographs and clearing samples (%)

      Coincidence according to the root canal types (%)

      ○: Correct, ×: Incorrect

      Coincidence ratio among examiners

      Table 1 Root canal types by interpreted radiographs (%)

      *: Significantly different at p < 0.05 (χ2 test)

      Table 2 A comparison of root canal types between radiographs and clearing samples

      *: Significantly different at p < 0.05 (χ2 test)

      Table 3 Coincidence of root canal types between radiographs and clearing samples (%)

      Table 4 Coincidence according to the root canal types (%)

      ○: Correct, ×: Incorrect

      Table 5 Coincidence ratio among examiners


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