Efficacy of rotary instruments with greater taper in preparing oval root canals

A. ElAyouti, A. L. Chu, I. Kimionis, C. Klein, R. Weiger, C. Löst

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Aim: To compare the preparation quality of two rotary systems and NiTi-hand files in oval root canals, and to evaluate the effect of canal dimensions on the preparation. Methodology: Ninety roots with oval root canals were selected. The middle third was cross sectioned at two levels and photographed. The maximum and minimum diameters of the root and canal were recorded. Teeth were distributed in three groups (n = 30) using stratified randomization, and prepared under simulated clinical conditions with Mtwo, ProTaper, or NiTi-hand files. The pre- and post-preparation photographs were traced and superimposed, the thickness of dentine removed was measured and the ratio of prepared canal outline was calculated. The impact of preparation system and canal dimensions on the quality of the preparation was evaluated using regression analysis. Results: With regards to the ratio of prepared canal outline, no statistical significant difference was found between Mtwo (0.75 [95%CI: 0.69; 0.81]) and ProTaper (0.75 [95%CI: 0.69; 0.80]), but both systems performed significantly better than NiTi-hand files (0.65 [95%CI: 0.60; 0.71]). In six root canals in Mtwo-group (20%), and eight root canals in ProTaper-group (27%), the minimal thickness of dentine-wall after preparation was less than 0.5 mm. In contrast to the maximum diameter of the root canal, the minimum diameter influenced the quality of the preparation (P = 0.0006). Conclusions: No instrumentation technique was able to circumferentially prepare the oval outline of root canals. Nevertheless, instruments with greater taper (ProTaper and Mtwo) were more efficient than NiTi- hand files, but this was, in some cases, at the expense of remaining dentine-wall thickness.

Original languageEnglish
Pages (from-to)1088-1092
Number of pages5
JournalInternational Endodontic Journal
Volume41
Issue number12
DOIs
Publication statusPublished - Dec 2008
Externally publishedYes

Fingerprint

Dental Pulp Cavity
Dentin
Hand
Random Allocation
Tooth
Regression Analysis

Keywords

  • Dentine wall thickness
  • Nickel titanium rotary systems
  • Oval root canal preparation
  • Root canal dimensions

ASJC Scopus subject areas

  • Dentistry(all)

Cite this

ElAyouti, A., Chu, A. L., Kimionis, I., Klein, C., Weiger, R., & Löst, C. (2008). Efficacy of rotary instruments with greater taper in preparing oval root canals. International Endodontic Journal, 41(12), 1088-1092. https://doi.org/10.1111/j.1365-2591.2008.01475.x

Efficacy of rotary instruments with greater taper in preparing oval root canals. / ElAyouti, A.; Chu, A. L.; Kimionis, I.; Klein, C.; Weiger, R.; Löst, C.

In: International Endodontic Journal, Vol. 41, No. 12, 12.2008, p. 1088-1092.

Research output: Contribution to journalArticle

ElAyouti, A, Chu, AL, Kimionis, I, Klein, C, Weiger, R & Löst, C 2008, 'Efficacy of rotary instruments with greater taper in preparing oval root canals', International Endodontic Journal, vol. 41, no. 12, pp. 1088-1092. https://doi.org/10.1111/j.1365-2591.2008.01475.x
ElAyouti, A. ; Chu, A. L. ; Kimionis, I. ; Klein, C. ; Weiger, R. ; Löst, C. / Efficacy of rotary instruments with greater taper in preparing oval root canals. In: International Endodontic Journal. 2008 ; Vol. 41, No. 12. pp. 1088-1092.
@article{cc484cdbfb7448b7a04103cd910e5bcd,
title = "Efficacy of rotary instruments with greater taper in preparing oval root canals",
abstract = "Aim: To compare the preparation quality of two rotary systems and NiTi-hand files in oval root canals, and to evaluate the effect of canal dimensions on the preparation. Methodology: Ninety roots with oval root canals were selected. The middle third was cross sectioned at two levels and photographed. The maximum and minimum diameters of the root and canal were recorded. Teeth were distributed in three groups (n = 30) using stratified randomization, and prepared under simulated clinical conditions with Mtwo, ProTaper, or NiTi-hand files. The pre- and post-preparation photographs were traced and superimposed, the thickness of dentine removed was measured and the ratio of prepared canal outline was calculated. The impact of preparation system and canal dimensions on the quality of the preparation was evaluated using regression analysis. Results: With regards to the ratio of prepared canal outline, no statistical significant difference was found between Mtwo (0.75 [95{\%}CI: 0.69; 0.81]) and ProTaper (0.75 [95{\%}CI: 0.69; 0.80]), but both systems performed significantly better than NiTi-hand files (0.65 [95{\%}CI: 0.60; 0.71]). In six root canals in Mtwo-group (20{\%}), and eight root canals in ProTaper-group (27{\%}), the minimal thickness of dentine-wall after preparation was less than 0.5 mm. In contrast to the maximum diameter of the root canal, the minimum diameter influenced the quality of the preparation (P = 0.0006). Conclusions: No instrumentation technique was able to circumferentially prepare the oval outline of root canals. Nevertheless, instruments with greater taper (ProTaper and Mtwo) were more efficient than NiTi- hand files, but this was, in some cases, at the expense of remaining dentine-wall thickness.",
keywords = "Dentine wall thickness, Nickel titanium rotary systems, Oval root canal preparation, Root canal dimensions",
author = "A. ElAyouti and Chu, {A. L.} and I. Kimionis and C. Klein and R. Weiger and C. L{\"o}st",
year = "2008",
month = "12",
doi = "10.1111/j.1365-2591.2008.01475.x",
language = "English",
volume = "41",
pages = "1088--1092",
journal = "International Endodontic Journal",
issn = "0143-2885",
publisher = "Wiley-Blackwell",
number = "12",

}

TY - JOUR

T1 - Efficacy of rotary instruments with greater taper in preparing oval root canals

AU - ElAyouti, A.

AU - Chu, A. L.

AU - Kimionis, I.

AU - Klein, C.

AU - Weiger, R.

AU - Löst, C.

PY - 2008/12

Y1 - 2008/12

N2 - Aim: To compare the preparation quality of two rotary systems and NiTi-hand files in oval root canals, and to evaluate the effect of canal dimensions on the preparation. Methodology: Ninety roots with oval root canals were selected. The middle third was cross sectioned at two levels and photographed. The maximum and minimum diameters of the root and canal were recorded. Teeth were distributed in three groups (n = 30) using stratified randomization, and prepared under simulated clinical conditions with Mtwo, ProTaper, or NiTi-hand files. The pre- and post-preparation photographs were traced and superimposed, the thickness of dentine removed was measured and the ratio of prepared canal outline was calculated. The impact of preparation system and canal dimensions on the quality of the preparation was evaluated using regression analysis. Results: With regards to the ratio of prepared canal outline, no statistical significant difference was found between Mtwo (0.75 [95%CI: 0.69; 0.81]) and ProTaper (0.75 [95%CI: 0.69; 0.80]), but both systems performed significantly better than NiTi-hand files (0.65 [95%CI: 0.60; 0.71]). In six root canals in Mtwo-group (20%), and eight root canals in ProTaper-group (27%), the minimal thickness of dentine-wall after preparation was less than 0.5 mm. In contrast to the maximum diameter of the root canal, the minimum diameter influenced the quality of the preparation (P = 0.0006). Conclusions: No instrumentation technique was able to circumferentially prepare the oval outline of root canals. Nevertheless, instruments with greater taper (ProTaper and Mtwo) were more efficient than NiTi- hand files, but this was, in some cases, at the expense of remaining dentine-wall thickness.

AB - Aim: To compare the preparation quality of two rotary systems and NiTi-hand files in oval root canals, and to evaluate the effect of canal dimensions on the preparation. Methodology: Ninety roots with oval root canals were selected. The middle third was cross sectioned at two levels and photographed. The maximum and minimum diameters of the root and canal were recorded. Teeth were distributed in three groups (n = 30) using stratified randomization, and prepared under simulated clinical conditions with Mtwo, ProTaper, or NiTi-hand files. The pre- and post-preparation photographs were traced and superimposed, the thickness of dentine removed was measured and the ratio of prepared canal outline was calculated. The impact of preparation system and canal dimensions on the quality of the preparation was evaluated using regression analysis. Results: With regards to the ratio of prepared canal outline, no statistical significant difference was found between Mtwo (0.75 [95%CI: 0.69; 0.81]) and ProTaper (0.75 [95%CI: 0.69; 0.80]), but both systems performed significantly better than NiTi-hand files (0.65 [95%CI: 0.60; 0.71]). In six root canals in Mtwo-group (20%), and eight root canals in ProTaper-group (27%), the minimal thickness of dentine-wall after preparation was less than 0.5 mm. In contrast to the maximum diameter of the root canal, the minimum diameter influenced the quality of the preparation (P = 0.0006). Conclusions: No instrumentation technique was able to circumferentially prepare the oval outline of root canals. Nevertheless, instruments with greater taper (ProTaper and Mtwo) were more efficient than NiTi- hand files, but this was, in some cases, at the expense of remaining dentine-wall thickness.

KW - Dentine wall thickness

KW - Nickel titanium rotary systems

KW - Oval root canal preparation

KW - Root canal dimensions

UR - http://www.scopus.com/inward/record.url?scp=55949126385&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=55949126385&partnerID=8YFLogxK

U2 - 10.1111/j.1365-2591.2008.01475.x

DO - 10.1111/j.1365-2591.2008.01475.x

M3 - Article

C2 - 19133098

AN - SCOPUS:55949126385

VL - 41

SP - 1088

EP - 1092

JO - International Endodontic Journal

JF - International Endodontic Journal

SN - 0143-2885

IS - 12

ER -