Dental and Medical Problems

Dent. Med. Probl.
Index Copernicus (ICV 2018) – 113.05
MNiSW – 20
Average rejection rate – 71.8%
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ISSN 1644-387X (print)
ISSN 2300-9020 (online)
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Dental and Medical Problems

2015, vol. 52, nr 1, January-March, p. 54–61

Publication type: original article

Language: English

Creative Commons BY-NC-ND 3.0 Open Access

Comparison of the Shaping Ability of Hyflex® CM™ Files with ProTaper Next® in Simulated L-Curved Canals

Porównanie skuteczności opracowania sztucznych kanałów w kształcie litery L dwoma systemami maszynowymi: Hyflex® CM™ i ProTaper Next®

Michał Łęski1,A,B, Mateusz Radwański2,B,C,D, Halina Pawlicka1,E,F

1 Department of Endodontics, Medical University of Lodz, Łódź, Poland

2 Member of Department of Endodontics Scientific Club, Medical University of Lodz, Łódź, Poland


Background. The aim of root canal treatment is to eliminate microorganisms from the root canal system. It consists of removing the infected pulp and shaping root canal system in order to facilitate irrigation and placement of a medicament or permanent filling material. In the last decade, many types of rotary root canal instruments have been introduced, varying in cross-section, blade and pitch design, and taper.
Objectives. The purpose of this study was to compare the shaping ability of Hyflex®CM™ Files with ProTaper Next®.
Material and Methods. Twenty resin blocks with simulated L-curved canals were used in this experimental study and randomly divided into two groups (ten in each). The canals were prepared with Hyflex CM Files and ProTaper Next to an apical size of 25 according to the recommendations of the manufacturer by crown-down technique. Each instrument was used only once. Before and after preparation blocks were fixed in a constant position and photographed. To investigate the shaping ability of instruments the amount of material removed at the different levels in the root canal, the change of working length and transportation of apex were measured. The results were statistically analyzed using t-test.
Results. There was a trend for the ProTaper Next to remove less material from the inner aspects of the canals in apical area when compared with Hyflex CM Files. In the present study, a significantly greater change of working length took place after use of ProTaper Next (p < 0.01). The difference between the average apical transportation in the compared systems was also statistically significant (p < 0.01).
Conclusion. Within limitation of this study, both systems prepared canals without significant shaping errors and no instruments fractured. Hyflex CM Files and ProTaper Next maintained artificial curvature well and were safe. Hyflex CM Files are more flexible than ProTaper Next.

Key words

Hyflex CM Files, ProTaper Next, root canal preparation, resin blocks

Słowa kluczowe

Hyflex CM, ProTaper Next, opracowanie kanałów korzeniowych, bloczki żywiczne

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