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HOME > Restor Dent Endod > Volume 32(2); 2007 > Article
Original Article A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K3TM in simulated canals with different curvatures
Hyun Yang1, In-Seok Yang1, Yun-Chann Hwang1, In-Nam Hwang1, Suk-Ja Yoon2, Won-Jae Kim3, Won-Mann Oh1
2007;32(2):-94.
DOI: https://doi.org/10.5395/JKACD.2007.32.2.087
Published online: March 31, 2007

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Corresponding Author: Won-Mann Oh. Department of Conservative Dentistry, School of Dentistry, Chonnam National University, 8 Hak-dong, Dong-gu, Gwangju, 501-757, Korea. Tel: 82-62-220-4431, Fax: 82-62-225-8387, wmoh@chonnam.ac.kr
• Received: February 20, 2006   • Revised: March 30, 2006   • Accepted: April 25, 2007

Copyright © 2007 Korean Academy of Conservative Dentistry

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  • This study was done to evaluate transportation of the apical foramen after 0.5 mm overinstrumentation by ProFile, ProTaper and K3 in simulated resin root canal.
    Sixty simulated resin root canal with a curvature of J and S-shape were divided into two groups. Each group consisted of three subgroups with 10 blocks according to the instruments used: ProFile®, ProTaper™, and K3TM. Simulated resin root canal was prepared by ProFile, ProTaper and K3 with 300 rpm by the crown-down preparation technique. Pre- and post-instrumentation apical foramen images were overlapped and recorded with Image-analyzing microscope 100X (Camcope, Sometech Inc, Korea). The amounts of difference in width and dimension on overlapped images were measured after reference points were determined by Image Analysis program (Image-Pro® Express, Media Cybernetic, USA). Data were analyzed using Kruskal-Wallis and Mann-Whitney U-test.
    The results suggest that ProFile showed significantly less canal transportation and maintained original apical foramen shape better than K3 and ProTaper.
  • Keywords: ProFile; ProTaper; K3; Simulated J and S-shape canal
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Figure 1
A and B diagrams indicate inner and outer side of canal curvature.
jkacd-32-87-g001.jpg
Figure 2
Procedure measuring the difference in width and dimensions of apical foramen. A. Measurement of difference in width of apical foramen after overlapping pre- and post-instrumentation images. (L1; Δ mesial width, L2; Δ outer width, L3; Δ distal width, L4; Δ inner width) B. Measurement of difference in dimensions of apical foramen after overlapping pre- and post-instrumentation images. (a; inner dimensions of apical foramen before instrumentation, b; outer dimensions of apical foramen before instrumentation, c; inner dimensions of apical foramen after instrumentation, d; outer dimensions of apical foramen after instrumentation)
jkacd-32-87-g002.jpg
Figure 3
ΔOuter width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
jkacd-32-87-g003.jpg
Figure 4
ΔInner width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
jkacd-32-87-g004.jpg
Figure 5
ΔOuter dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
jkacd-32-87-g005.jpg
Figure 6
ΔInner dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
jkacd-32-87-g006.jpg
Table 1
Shaping sequence of ProFile, ProTaper and K3

WL (Working length) = CL (Canal length) + 0.5 mm

jkacd-32-87-i001.jpg
Table 2
Mean values of difference of outer, inner width and dimensions in apical foramen (Mean ± S.D)

Other letters mean significant difference (p < 0.05).

jkacd-32-87-i002.jpg

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        A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K3TM in simulated canals with different curvatures
        J Korean Acad Conserv Dent. 2007;32(2):87-94.   Published online March 31, 2007
        DOI: https://doi.org/10.5395/JKACD.2007.32.2.087
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      A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K3TM in simulated canals with different curvatures
      Image Image Image Image Image Image
      Figure 1 A and B diagrams indicate inner and outer side of canal curvature.
      Figure 2 Procedure measuring the difference in width and dimensions of apical foramen. A. Measurement of difference in width of apical foramen after overlapping pre- and post-instrumentation images. (L1; Δ mesial width, L2; Δ outer width, L3; Δ distal width, L4; Δ inner width) B. Measurement of difference in dimensions of apical foramen after overlapping pre- and post-instrumentation images. (a; inner dimensions of apical foramen before instrumentation, b; outer dimensions of apical foramen before instrumentation, c; inner dimensions of apical foramen after instrumentation, d; outer dimensions of apical foramen after instrumentation)
      Figure 3 ΔOuter width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
      Figure 4 ΔInner width of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
      Figure 5 ΔOuter dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.
      Figure 6 ΔInner dimensions of apical foramen between pre- and post-instrumentation according to the types of files and curvatures.

      Figure 1

      Figure 2

      Figure 3

      Figure 4

      Figure 5

      Figure 6

      A study on transportation of apical foramen after overinstrumentation by ProFile®, ProTaper™ and K3TM in simulated canals with different curvatures

      Shaping sequence of ProFile, ProTaper and K3

      WL (Working length) = CL (Canal length) + 0.5 mm

      Mean values of difference of outer, inner width and dimensions in apical foramen (Mean ± S.D)

      Other letters mean significant difference (p < 0.05).
      Table 1 Shaping sequence of ProFile, ProTaper and K3

      WL (Working length) = CL (Canal length) + 0.5 mm

      Table 2 Mean values of difference of outer, inner width and dimensions in apical foramen (Mean ± S.D)

      Other letters mean significant difference (p < 0.05).

      Table 1

      Table 2

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