Canal-centering ability: An endodontic challenge

Kandaswamy, Deivanayagam; Nagendrababu, Venkateshbabu; Porkodi, Ilango; Pradeep, Gali

doi:10.4103/0972-0707.53334

Cited by 73 publications

(41 citation statements)

References 51 publications

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“…[1617] Instrumentation in K3 Group was performed by Crown-down technique where dentin chips resulting from the cutting action are easily dislodged from the working area and carried coronally to the orifice via its unique helical angle. [1819] This could be the probable reason for minimal extrusion of E. faecalis in K3 when compared to Mtwo, RaCe, and Protaper.…”

Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of apical extrusion of intracanal bacteria using K3, Mtwo, RaCe and protaper rotary systems: An in vitro study

Garlapati

Venigalla²,

Patil³

et al. 2013

J Conserv Dent

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Aim:This aim of this study was to evaluate the number of bacteria extruded apically during root canal preparation using Four Rotary instrumentation techniques.Materials and Methods:A total of 50 extracted mandibular premolars were selected, access cavities prepared and inserted in to rubber stoppers of 10 mL glass vial. Root canals were contaminated with a suspension of Enterococcus faecalis (E. faecalis) American Type Culture Collection (ATCC) 29212 and incubated for 24 h at 37°C. Debris extruded from the apical foramen during instrumentation was collected into vials. The numbers of Colony-forming units were determined for each sample.Statistical Analysis:The data obtained were analyzed using the one-way ANOVA followed by post-hoc tukey's test with a P = 0.05 as the level for statistical significance.Results:Results suggested a statistically significant difference in the number of colony forming units between four experimental rotary Nickel-Titanium instrumentation groups (P < 0.001).Conclusion:Although, extrusion of bacteria was found in all the experimental groups. There was less bacterial extrusion in K3 Group while more bacterial extrusion was seen in Mtwo Group.

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Section: Discussionmentioning

confidence: 99%

Quantitative evaluation of apical extrusion of intracanal bacteria using K3, Mtwo, RaCe and protaper rotary systems: An in vitro study

Garlapati

Venigalla²,

Patil³

et al. 2013

J Conserv Dent

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“…Deviation from the original curvature can lead to excessive or inappropriate dentine removal, straightening of the canal and creation of a ledge in the dentinal wall, a biomechanical defect known as elbow, which forms the coronal to the elliptical-shaped apical seal, canals with hourglass appearance in cross-section, which requires stripping and over-preparation that weakens the tooth, resulting in fracture of the root. [3]…”

Section: Introductionmentioning

confidence: 99%

An ex vivo comparative analysis on shaping ability of four NiTi rotary endodontic instruments using spiral computed tomography

Maitin¹,

Arunagiri²,

Brave³

et al. 2013

J Conserv Dent

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Objective:Analysis of shaping ability of four different rotary endodontic instruments using spiral computed tomography (CT).Materials and Methods:Eighty freshly extracted human mandibular first molars were used in the present study. Samples were randomly divided into four experimental groups with twenty samples in each group. Images of mesiobuccal canal of each sample were obtained pre- and post-operatively using spiral CT. All samples were prepared using their respective endodontic file systems (group I - ProTaper, group II - K3, group III - RaCe, and group IV - Mtwo). Image analyses were done using image analysis software for evaluation of canal transportation and centering ability. Data was then statistically analyzed using analysis of variance.Results:There was no statistically significance in transportation in their intergroup difference at any of the three locations (coronal, middle, and apical third). In centering ability there was no statistically significance in the coronal and middle third of the intergroup. However, there was a statistically significance of (P = 0.044) at the apical third between all the groups.Conclusion:Canals prepared with ProTaper had more canal transportation at all the three levels of root canal (coronal, middle, and apical third). Canals prepared with Mtwo were well centered at coronal and middle third whereas with RaCe canals were centered only at the apical third. All instruments showed some degree of canal aberrations in terms of shaping ability.

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“…However, endodontic preparation with different techniques and instruments becomes more challenging when the root canal has pronounced curvature, and in such cases there is a tendency for deviation of the prepared canal away from its natural axis [4]. The ability of an instrument or technique to stay centered within the natural canal path during preparation is seen as a highly positive property [5]. Iatrogenic preparation errors such as canal transportation are clearly undesirable, and can be broadly defined as any deviation from the natural canal path [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of preparation techniques on root canal shaping assessed by micro-computed tomography

Stavileci

Hoxha

Görduysus

et al. 2013

Med Sci Monit Basic Res

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BackgroundRoot canal shaping without any procedural error is of the utmost preference. Therefore, the purpose of this study was to use micro-computed tomography to evaluate and compare the root canal shaping efficacy of ProTaper rotary files and standard stainless steel K-files.Material/MethodsSixty extracted upper second premolars were selected and were divided into 2 groups of 30. Before preparation, all samples were scanned by micro-CT. Then, 30 teeth were prepared with stainless steel files and the remaining 30 with ProTaper rotary files. Canal transportation and centering ability before and after root canal shaping were assessed using micro-CT. The amount and direction of canal transportation and the centering ratio of each instrument were determined in the coronal, middle, and apical parts of the canal. The 2 groups were statistically compared using one-way ANOVA.ResultsProTaper rotary files gave less transportation (p<0.001) and better centering ability (p<0.00001) compared with stainless steel files.ConclusionsThe manual technique for preparation of root canals with stainless steel files produces more canal transportation, whereas rotary files remain more centered in the canal.

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Canal-centering ability: An endodontic challenge

Cited by 73 publications

References 51 publications

Quantitative evaluation of apical extrusion of intracanal bacteria using K3, Mtwo, RaCe and protaper rotary systems: An in vitro study

Quantitative evaluation of apical extrusion of intracanal bacteria using K3, Mtwo, RaCe and protaper rotary systems: An in vitro study

An ex vivo comparative analysis on shaping ability of four NiTi rotary endodontic instruments using spiral computed tomography

Effects of preparation techniques on root canal shaping assessed by micro-computed tomography

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