Torsional Performance of ProTaper Gold Rotary Instruments during Shaping of Small Root Canals after 2 Different Glide Path Preparations

Objectives: The purpose of this study was to evaluate the efficacy of steps, isolated or in cumulative means, in the endodontic retreatment of curved canals. Methodology: Forty mesial roots of mandibular molars were divided into two groups. In the group 1 the filling removal was done with NiTi reciprocating M-wire and NiTi control memory wire rotary instruments followed by a passive ultrasonic irrigation solution agitation. In the group 2, the initial filling removal was done with NiTi reciprocating M-wire and conventional NiTi wire rotary instruments followed by a rotary plastic instrument for irrigation solution agitation. The results were analyzed through micro-computed tomography. Results: The filling material was not completely removed for both groups. All steps did not statically differ between groups regarding to the filling removal. In the intragroup analyses, the results differed in some levels, mainly in the apical level, but did not statistically differ in all the different levels after each step. A statistical significant increase (P<.05), for both groups, in the volume of filling material in the isthmus was observed. Conclusions: None of the protocols completely removed the filling material. The better results were found for the apical level and after passive ultrasonic irrigation. Vertical warm condensation filling technique enhanced the volume of filling material in the root canal system including the isthmus. Clinical relevance: the control memory NiTi instruments could be considered a good choice for use as an additional step in the procedure of filling removal from curved mesial root canals.

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The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study

PeerJ ◽

10.7717/peerj.3583 ◽

2017 ◽

Vol 5 ◽

pp. e3583 ◽

Cited By ~ 9

Author(s):

Andreas Bartols ◽

Bernt-Peter Robra ◽

Winfried Walther

Keyword(s):

Retrospective Study ◽

Root Canal ◽

Primary Root ◽

Primary Treatment ◽

Endodontic Treatment ◽

Binary Logistic Regression Model ◽

Root Canals ◽

Maxillary Molars ◽

Glide Path ◽

Working Length

Background Reciproc instruments are the only contemporary root canal instruments where glide path preparation is no longer strictly demanded by the manufacturer. As the complete preparation of root canals is associated with success in endodontic treatment we wanted to assess the ability and find predictors for Reciproc instruments to reach full working length (RFWL) in root canals of maxillary molars in primary root canal treatment (1°RCTx) and retreatment (2°RCTx) cases. Methods This retrospective study evaluated 255 endodontic treatment cases of maxillary molars. 180 were 1°RCTx and 75 2°RCTx. All root canals were prepared with Reciproc instruments. The groups were compared and in a binary logistic regression model predictors for RFWL were evaluated. Results A total of 926 root canals were treated with Reciproc without glide path preparation. This was possible in 885 canals (95.6%). In 1°RCTx cases 625 of 649 (96.3%) canals were RFWL and in 2°RCTx cases 260 of 277 (93.9%). In second and third mesiobuccal canals (MB2/3) 90 out of 101 (89.1%) were RFWL with Reciproc in 1°RCTx and in the 2°RCTx treatment group 49 out of 51 cases (96.1%). In mesio-buccal (MB1) canals “2°RCTx” was identified as negative predictor for RFWL (OR 0.24 (CI [0.08–0.77])). In MB2/3 canals full working length was reached less often (OR 0.04 (CI [0.01–0.31])) if the tooth was constricted and more often if MB2/3 and MB1 canals were convergent (OR 4.60 (CI [1.07–19.61])). Discussion Using Reciproc instruments, the vast majority of root canals in primary treatment and retreatment cases can be prepared without glide path preparation.

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Micro-Computed Tomography (Micro-CT) Evaluation of Effects of Different Rotary Glide Path Techniques on Canal Transportation and Centering in Curved Root Canals

Medical Science Monitor ◽

10.12659/msm.916112 ◽

2019 ◽

Vol 25 ◽

pp. 6351-6358

Author(s):

Gabrielė Česaitienė ◽

Tadas Venskutonis ◽

Vita Mačiulskienė ◽

Vaidotas Cicėnas ◽

Vykintas Samaitis ◽

...

Keyword(s):

Computed Tomography ◽

Micro Ct ◽

Micro Computed Tomography ◽

Root Canals ◽

Glide Path ◽

Ct Evaluation ◽

Canal Transportation ◽

Curved Root Canals

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Apical Debris Extrusion in Curved Root Canals: The Effect of Four Rotary Instruments and Influence of Gravitational Force

Journal of Ege University School of Dentistry ◽

10.5505/eudfd.2021.67044 ◽

2021 ◽

Vol 42 (1) ◽

pp. 31-35

Author(s):

İlknur Kaşıkçı Bilgi ◽

Mehmet Kemal Çalışkan

Keyword(s):

Gravitational Force ◽

Root Canals ◽

Rotary Instruments ◽

Curved Root Canals

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Safe Mechanical Preparation with Reciprocation Movement without Glide Path Creation: Result from a Pool of 673 Root Canals

Brazilian Dental Journal ◽

10.1590/0103-6440201600334 ◽

2016 ◽

Vol 27 (1) ◽

pp. 22-27 ◽

Cited By ~ 13

Author(s):

Evaldo Rodrigues ◽

Gustavo De-Deus ◽

Erick Souza ◽

Emmanuel João Nogueira Leal Silva

Keyword(s):

Case Series ◽

Frequency Distributions ◽

Root Canals ◽

Path Creation ◽

Glide Path ◽

Mechanical Preparation ◽

Case Series Study ◽

Working Length ◽

Manufacturer Recommendation ◽

Total Pool

Abstract The aim of the present study was to prospectively assess the frequency of teeth in which the Reciproc instruments were able to reach the full working length (WL). This case series study enrolled 277 consecutive teeth requiring primary endodontic treatment performed with the Reciproc system (VDW) without a previous glide path by 3 experienced endodontists. Instruments R25, R40 or R50 were selected, respectively, for narrow, medium and large canals, according to the preoperative radiographs, as per manufacturer recommendation. Canals were instrumented and classified as reaching the full WL (RFWL) and not reaching the full WL (NRFWL), according to the ability of the Reciproc instrument to reach without a glide path the full electronically determined WL. Finally, canals were filled using a single matched cone technique. Pearson's squared-chi test compared the frequency distributions of canals classified as RFWL and NRFWL. From a total pool of 673 root canals, Reciproc instruments reached the FWL in 96.28% of cases and 3 fractures occurred. For narrow canals the percentage of RFWL was 95.37% with 3 fractures. For medium and large canals, the R40 or R50 instruments reached the FWL in 98.51% and 97.62% of the cases respectively, with no fracture. Enlarging of root canals using the Reciproc instruments up to the FWL without a glide path is successful in a great percentage of cases. This case series suggests the possibility of using a single instrument to enlarge the root canal space of teeth by a simpler approach without an a prioriglide path procedure.

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Effectiveness of supplementary irrigant agitation with the Finisher GF Brush on the debridement of oval root canals instrumented with the Gentlefile or nickel titanium rotary instruments

International Endodontic Journal ◽

10.1111/iej.12892 ◽

2018 ◽

Vol 51 (7) ◽

pp. 800-807 ◽

Cited By ~ 5

Author(s):

P. Neelakantan ◽

K. Khan ◽

K. Y. Li ◽

H. Shetty ◽

W. Xi

Keyword(s):

Nickel Titanium ◽

Root Canals ◽

Rotary Instruments

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Influence of different auxiliary agents of biomechanical preparation in the filling of "artificially prepared" lateral canals

Journal of Applied Oral Science ◽

10.1590/s1678-77572005000200010 ◽

2005 ◽

Vol 13 (2) ◽

pp. 147-151 ◽

Cited By ~ 1

Author(s):

Daniela Ribeiro da Silva ◽

Ivaldo Gomes de Moraes

Keyword(s):

Penetration Rate ◽

Hybrid Technique ◽

Human Teeth ◽

Root Canals ◽

Filling Materials ◽

Rotary Instruments ◽

Significant Difference ◽

Group A ◽

Group B ◽

Group D

The purpose of the present study was to evaluate the influence of some auxiliary agents of biomechanical preparation of the root canal on the filling of artificial lateral canals in extracted human teeth. A total of eighty single-rooted teeth were employed, which were submitted to preparation of three artificial lateral canals in one of the proximal aspects at the cervical, middle and apical thirds, besides one in the buccal aspect. The main canals were prepared by Profile 0.4 rotary instruments through the crown-down technique and irrigated with the irrigants investigated, as follows: Group A - 1% sodium hypochlorite and final irrigation with trisodium EDTA for 5 minutes; Group B - Endogel (2% chlorhexidine gel); Group C - Endo PTC and Dakin's solution and final irrigation with Tergentol- Furacin; and Group D - File Eze. The root canals were obturated by the Tagger's hybrid technique and then radiographed for assessment of the penetration rate of the filling materials in the lateral canals. Analysis of the results demonstrated no statistically significant difference (p<0.05) between the irrigants both to each other and as regards the location (thirds and aspects) of the artificial lateral canals.

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