Canal transportation and centering ratio after preparation in severely curved canals: analysis by micro-computed tomography and double-digital radiography

Poly, Ane; Al‐Malki, Fouad; Marques, Fernando; Karabucak, Bekir

doi:10.1007/s00784-019-02870-8

Cited by 37 publications

(42 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the present study, XP-endo Shaper showed lower canal transportation and higher centering ratio, which was in agreement with the results of Poly who compared XP-endo Shaper with WOG le [29]. Hassan compared the canal transportation and centering ability of XP-endo Shaper, WaveOne and OneShape rotary systems using CBCT and showed that XP-endo Shaper better preserved the original canal shape compared with the other two systems [30].…”

Section: Discussionsupporting

confidence: 91%

Cone-Beam Computed Tomographic Analysis of Apical Transportation and Centering Ratio of Protaper and XP-Endo Shaper Niti Rotary Systems in Curved Canals: An in Vitro Study

Karkehabadi

Siahvashi

Shokri

et al. 2020

Preprint

View full text Add to dashboard Cite

Background: Cleaning and shaping of the root canal system is important in an endodontic treatment. Canal transportation is a common procedural error in preparation of curved canals. This study aimed to compare the canal transportation and centering ratio of two rotary files in curved canals using cone-beam computed tomography (CBCT). Methods: 44 extracted human mandibular first molars with mature apices and apical curvature of 10° to 30° were selected. The samples were randomly divided into two groups (n=22) with similar curvature. The canals were prepared with ProTaper and XP-endo Shaper file systems according to the manufacturers’ instructions. CBCT images were captured using Cranex 3D CBCT system before and after root canal preparation, and canal transportation and centering ratio of the files at 3, 4 and 5 mm from the apex were calculated. Data were analyzed and compared between two groups using independent t-test at 0.05 level of significance.Results: The ProTaper Universal caused greater canal transportation and had lower centering ratio than XP-endo Shaper in both mesiodistal and buccolingual directions at all levels from the apex. The difference between two groups regarding transportation was significant at all levels from the apex in buccolingual direction (P<0.05) except for 3 mm from the apex (P>0.05). The difference between two groups regarding centering ratio was not significant (P>0.05) in mesiodistal direction at all levels except for 4 mm from the apex (P<0.05). Conclusion:The ProTaper Universal causes greater canal transportation in both buccolingual and mesiodistal directions than XP-endo Shaper.

show abstract

Section: Discussionsupporting

confidence: 91%

Cone-Beam Computed Tomographic Analysis of Apical Transportation and Centering Ratio of Protaper and XP-Endo Shaper Niti Rotary Systems in Curved Canals: An in Vitro Study

Karkehabadi

Siahvashi

Shokri

et al. 2020

Preprint

View full text Add to dashboard Cite

show abstract

“…Research protocol was approved by the Research Ethics Committee (PKUSSIRB-201417105). Fifteen extracted mandibular molars with intact mesial roots and closed apices were chosen, based on the power analysis calculation in a previous study by our institution [ 15 ]. Briefly, an effect size of 1.93, an alpha-type error of 0.05 and a power beta of 0.95 were input together into an independent samples test from the t -test family (G*Power 3.1.9.3 for Macintosh; Heinrich Heine, Dusseldorf, Germany).…”

Section: Methodsmentioning

confidence: 99%

Comparison of canal transportation and centering ability of manual K-files and reciprocating files in glide path preparation: a micro-computed tomography study of constricted canals

et al. 2021

Self Cite

View full text Add to dashboard Cite

Background Optimum Glide Path (OGP) is a new reciprocating motion aiming to perform efficient glide path preparation in constricted canals. The aim of this study was to investigate and compare manual and OGP movement in terms of canal transportation and centering ability in glide path preparation of constricted canals. Methods Thirty constricted mesial root canals of mandibular molars, with initial apical size no larger than ISO#8, were selected and negotiated with #6–#8 K-files under the microscope. Canals were randomly divided into two experimental groups: Group 1 (MAN, n = 15): Glide path was established by using #10-#15 stainless steel K-files manually; Group 2 (OGP, n = 15): #10-#15 Mechanical Glide Path super-files were used with OGP motion (OGP 90°, 300 rpm). Each instrument was used to prepare only 2 canals (as in one mesial root). Canals were scanned before and after glide path preparation with micro-computed tomography (micro-CT) to evaluate root canal transportation and centering ratio at 1, 3 and 5 mm levels from the root apex. File distortions and separations were recorded. Paired t-test was used to statistically evaluate the data (P < .05). Results Group 2 showed a significantly lower transportation value than group 1 at 1-mm and 3-mm levels (P < .05), however the difference at 5-mm level was not significant. There was no significant difference regarding the centering ratio between the groups. Six #10 K-files were severely distorted in group 1, while no file separation or distortion was found in group 2. Conclusions OGP motion performed significantly less canal transportation (apical 3 mm) and file distortion during glide path establishment in constricted canals comparing to manual motion, while the centering ability between the two was similar. Clinical relevance OGP reciprocating motion provides a safer and efficient clinical approach compared to traditional manual motion in glide path establishment with small files in constricted canals.

show abstract

“…In clinical endodontics, several technical parameters were applied to investigate the canal shape before and after radicular dentine instrumentation. The quantitative evaluation of postoperative root canal changes can be estimated by the “centering ratio” method on original root canal curvature angle [ 14 , 15 ], or by measuring pre-and postoperative radicular dentine thickness, on superimposing radiographic images before and after shaping using CBCT scanning or digital radiographic imaging techniques[ 16 , 17 ]. Furthermore, analysis of change in canal curvature angle after shaping has been widely used in the literature to evaluate the tendency of a technique, or the mechanical properties of an instrument, to maintain the preoperative root canal geometry or to straighten the curves [ 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Root canal curvature as a prognostic factor influencing the diagnostic accuracy of radiographic working length determination and postoperative canal axis modification: an in vitro comparative study

Faraj

2021

BMC Oral Health

View full text Add to dashboard Cite

Background Radiographic analysis of tooth morphology is mandatory for accurate calibration of the degree of canal curvature angle and radiographic working length to its real dimensions in case difficulty assessment protocols. This study aimed to determine the impact of the degree of root canal curvature angle on maintaining the real working length and the original canal axis of prepared root canals using a reciprocating rotary instrumentation technique. Methods Radiographic image analysis was performed on 60 extracted single-rooted human premolar teeth with a moderate canal curvature (10°–25°) and severe canal curvature (26°–70°). Working length and longitudinal canal axis were determined using cone-beam computed tomography (CBCT) and digital periapical radiography. The real canal length was determined by subtracting 0.5 mm from the actual canal length. Root canals were prepared using the WaveOne Gold reciprocating file (Dentsply Maillefer, Ballaigues, Switzerland). Results There was no significant relation of the degree of canal curvature angle to the accuracy of radiographic working length estimated on CBCT and digital periapical radiographic techniques (P > 0.05). Postinstrumentation changes in the original canal axis between moderate and severe canal curvature angles, assessed on CBCT and periapical digital radiographic images were statistically non-significant (P > 0.05). Conclusions A standardized digital periapical radiographic method performed similarly to the CBCT technique near to its true working length. No significant interaction exists between the diagnostic working length estimation, postoperative root canal axis modification, and the degree of canal curvature angle, using reciprocating rotary instrumentation technique.

show abstract

Canal transportation and centering ratio after preparation in severely curved canals: analysis by micro-computed tomography and double-digital radiography

Cited by 37 publications

References 45 publications

Cone-Beam Computed Tomographic Analysis of Apical Transportation and Centering Ratio of Protaper and XP-Endo Shaper Niti Rotary Systems in Curved Canals: An in Vitro Study

Cone-Beam Computed Tomographic Analysis of Apical Transportation and Centering Ratio of Protaper and XP-Endo Shaper Niti Rotary Systems in Curved Canals: An in Vitro Study

Comparison of canal transportation and centering ability of manual K-files and reciprocating files in glide path preparation: a micro-computed tomography study of constricted canals

Root canal curvature as a prognostic factor influencing the diagnostic accuracy of radiographic working length determination and postoperative canal axis modification: an in vitro comparative study

Contact Info

Product

Resources

About