The efficiency of the Ni-Ti rotary files in curved simulated canals shaped by novice operators

Cho, Kyung-Mo; Kim, Jin-Woo

doi:10.5395/jkacd.2003.28.2.146

Cited by 6 publications

(7 citation statements)

References 24 publications

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“…Despite its several merits, however, some studies showed that the ProTaper instruments produced more aberration, deformation and straightening of the canal especially at the apical portion, due to their thicker and stiffer finishing files (F1, F2 and F3) 12,14) . Because of these concerns about procedural errors, some studies recommended that the use of passive or manual NiTi files should be better for the final phase of shaping of curved canals as a hybrid technique 15,17) . It leads to the concept of hybrid instrumentation that can combine the best features of different systems for safe, quick, and predictable results 16) .…”

Section: ⅳ Discussionmentioning

confidence: 99%

“…And then, some researchers suggested that a Ni-Ti file of less taper or U-file design -e.g. ProFile (Dentsply Maillefer, Ballaigues, Switzerland)-should be better for refining of the apical portion of small curved canals because of its greater elasticity [15][16][17] . Judging from these various views, the complex design of ProTaper system capacitates efficient shaping of the coronal aspects of the canal and the relocation of canal orifices, resulting in a straight-line access 10,15,16) .…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…Therefore, the ProTaper with other file systems can be used in combination to emphasize the advantages of each system. This hybrid concept is to combine instruments of different file systems and use different instrumentation techniques suitable for individual clinical situations, thus the clinicians can achieve the best biomechanical cleaning and shaping results more easily and simply 16,17) . The purposes of this study are to compare and evaluate the shaping abilities of various hybrid instrumentation methods, using constant tapered file systems with ProTaper S1, and to compare the differences between experts and inexperienced clinicians in use of NiTi instruments.…”

Section: ⅰ Introductionmentioning

confidence: 99%

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Comparison of shaping ability between various hybrid instrumentation methods with ProTaper

Hong

Park

Hur

et al. 2006

J Korean Acad Conserv Dent

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The purpose of this study was to compare and evaluate the shaping abilities of various hybrid instrumentation method using constant tapered file systems with ProTaper � S1 and the difference between experts and inexperienced clinicians in use of NiTi file.Three hybrid methods used in this study were composed of ProTaper � S1 and K-Flexofile � (group S), ProTaper � S1 and HeroShaper � (group H), and ProTaper � S1 and ProFile � (group P), respectively. The ProTaper � -alone method (group C) was introduced as a control group. After canal preparation, the lapse of time was recorded. The images of pre-and post-operative canal were scanned and superimposed. Amounts of instrumented canal widths and centering ratio were measured at apical 1, 2 and 3 ㎜ levels and statistical analysis was performed.In this study, both of the group C and S took more time to prepare canals than other groups. Inexperienced operators required more time for the entire preparation with the groups C and H than the experienced (p < 0.05). And the centering ratio of group P were preferable to ProTaper � -alone method or the hybrid technique using stainless steel files. As such, within experienced operators, group H also showed better results in addition to the group P.Under these condition, the hybrid methods of each the ProFile � system and HeroShaper � with ProTaper � are recommendable comparative to ProTaper � -alone method. According to the results, the hybrid instrumentation method is a more appropriate method of canal preparation than single file system for narrow or curved canals.

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Section: ⅳ Discussionmentioning

confidence: 99%

Section: ⅰ Introductionmentioning

confidence: 99%

Section: ⅰ Introductionmentioning

confidence: 99%

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Comparison of shaping ability between various hybrid instrumentation methods with ProTaper

Hong

Park

Hur

et al. 2006

J Korean Acad Conserv Dent

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“…ProFile) are good for refining of the apical portion of small curved canals because of its greater elasticity [18][19][20] . Therefore, the combined use of the ProTaper with other file systems can emphasize the advantages of each system.…”

Section: ⅰ Introductionmentioning

confidence: 99%

“…Therefore, the combined use of the ProTaper with other file systems can emphasize the advantages of each system. This hybrid concept combining different file systems and different instrumentation techniques suitable for individual clinical situations, enables the clinicians to achieve the best biomechanical cleaning and shaping results more easily and simply 19,20) . Recently, new ProTaper system (ProTaper Universal) with different configuration and crosssectional design have been marketed.…”

mentioning

confidence: 99%

Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique

Kim

Park

Hur

et al. 2007

J Korean Acad Conserv Dent

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Currently, various Nickel-Titanium rotary files are used in endodontic treatment, but there is no one perfect system that can be applied to any clinical situation. Therefore, the combined uses of various file systems which can emphasize the advantages of each system are introduced as hybrid instrumentation.The ProTaper system is efficient in body shaping and apical pre-enlargement but is reported to have more possibility of transportation and produce more aberrations and deformation in more or less severe curved canals. Recently, new ProTaper system (ProTaper Universal) with different configuration and cross-sectional design to overcome the week points of ProTaper have been marketed.The purpose of this study was to compare and evaluate the shaping abilities of ProTaper, ProTaper Universal system, and two hybrid methods using S-series of ProTaper Universal and Hero Shaper or ProFile.The time lapses for instrumentation were measured and the used files were inspected for distortion. The pre-and post-instrumented root canals were scanned and superimposed to evaluate the aberrations and reduction of root canal curvature and change of radius of canal curvature. The increased canal width and apical centering ratio were calculated at 1, 2, 3, 4 and 5 ㎜ levels from apical foramen.Under the conditions of this study, the ProTaper Universal seems to have better shaping ability than ProTaper in terms of instrumented width and instrumentation time. It may be suggested that the ProTaper Universal system is efficient as much as hybrid instrumentation using ProTaper and other constant-tapered NiTi file systems in highly experienced operators. . And the use of NiTi rotary instrumentation can effectively produce a well-tapered root canal form sufficient for obturation with minimal risk of transporting the original canal, and are helpful in the preparation of curved root canals [2][3][4][5][6] . It is estimated that there are more than least 18 different rotary file brands in the endodontic marketplace 7) . Most of these NiTi file systemse.g. ProFile (Dentsply Maillefer, Ballaigues, Switzerland), K3 (SybronEndo, Glendora, France), Mtwo (VDW, Munich, Germany), Hero642 (Micromega, Besancon, France) and Hero Shaper (Micromega, Besancon, France), -have a constant tapered shaft design, while these have their own rake angles and radial lands 6,[8][9][10] . Distinctively, the ProTaper system (Dentsply Maillefer, Ballaigues, Switzerland) is an unique instrument which has progressively changing tapered shaft design along a single instrument in the shaft design 11,12) . And the design of cross-section of ProTaper -convex triangular -is claimed to reduce the contact area between the file and dentin, and to have excellent cutting efficiency 12) . It was claimed that the ProTaper system provides a continuous tapered preparation of the root canal, without significant transportation of the original curvature of the root canal 12) . And also it was suggested that the ProTaper instruments might be better suited for curved and constricted canals tha...

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Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis

et al. 2008

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The efficiency of the Ni-Ti rotary files in curved simulated canals shaped by novice operators

Cited by 6 publications

References 24 publications

Comparison of shaping ability between various hybrid instrumentation methods with ProTaper

Comparison of shaping ability between various hybrid instrumentation methods with ProTaper

Comparison of shaping ability using various Nickel-Titanium rotary files and hybrid technique

Stress distribution of three NiTi rotary files under bending and torsional conditions using a mathematic analysis

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