Top

Published in:

01-12-2018 | Original Article

Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study

Authors: Camila Galletti Espir, Camila Almeida Nascimento-Mendes, Juliane Maria Guerreiro-Tanomaru, Bruno Cavalini Cavenago, Marco Antonio Hungaro Duarte, Mário Tanomaru-Filho

Published in: Clinical Oral Investigations | Issue 9/2018

Abstract

Objectives

To evaluate the shaping ability and cleaning after oval root canal preparation using one or more instruments in reciprocating or rotary motion.

Materials and methods

Oval-shaped mandibular incisors were selected, based on the radiographic diameter (2 ≤ diameter ratio ≤ 4), and assigned according to root canal preparation (n = 18): single-file (Reciproc R40); two reciprocating files (Unicone size 20 and 40, .06 taper) or Mtwo rotary files until a size 40, .06 taper instrument. Root canal preparations were performed using an open root canal model. Scanning was performed before and after preparation using SkyScan 1176 with a voxel size of 17.42 μm. Volume, percentage of debris, and percentage of uninstrumented surface were analyzed in the entire root canal and in each root canal third. Data were compared using ANOVA and Tukey or Kruskal-Wallis and Dunn tests (α = 5%).

Results

The initial volume were similar among the groups (p > .05). Unicone preparation was associated with higher debris, increase in root canal volume and uninstrumented surface in entire root canal and in the middle third (P < .05). Mtwo was associated with lower uninstrumented surface in the entire root canal and in the cervical third. The apical third were similar for the three preparations.

Conclusions

Unicone system using two instruments in reciprocating motion resulted in higher increase in volume. However, less remaining debris was observed when Reciproc single-file and Mtwo rotary systems were used.

Clinical relevance

A preparation that volumetrically increases the root canal is not necessarily associated with better cleaning. Shaping and hard-tissue debris removal depends on root canal anatomy, kinematics, number of instruments, and instrument design.

Peters OA (2009) Current challenges and concepts in the preparation of root canal systems: a review. J Endod 30:559–567CrossRef

De-Deus G, Barino B, Zamolyi R et al (2010) Suboptimal debridement quality produced by the single-file F2 Protaper technique in oval-shaped canals. J Endod 36:1897–1900. https://doi.org/10.1016/j.joen.2010.08.009 CrossRefPubMed

Versiani MA, Leoni GB, Steier L, de-Deus G, Tassani S, Pécora JD, de Sousa-Neto MD (2013) Micro-computed tomography study of oval-shaped canals prepared with the self-adjusting file, Reciproc, WaveOne, and ProTaper universal systems. J Endod 39:1060–1066. https://doi.org/10.1016/j.joen.2013.04.009 CrossRefPubMed

Farmakis ET, Sotiropoulos GG, Abràmovitz I, Solomonov M (2016) Apical debris extrusion associated with oval shaped canals: a comparative study of WaveOne vs Self-Adjusting File. Clin Oral Investig 20:2131–2138. https://doi.org/10.1007/s00784-016-1709-3 CrossRefPubMed

Vandenberghe B, Bud M, Sutanto A, Jacobs R (2010) The use of high-resolution digital imaging technology for small diameter K-file length determination in endodontics. Clin Oral Investig 14:223–231. https://doi.org/10.1007/s00784-009-0285-1 CrossRefPubMed

Robinson JP, Lumley PJ, Cooper PR, Grover LM, Walmsley AD (2013) Reciprocating root canal technique induces greater debris accumulation than a continuous rotary technique as assessed by 3-dimensional micro-computed tomography. J Endod 39:1067–1070. https://doi.org/10.1016/j.joen.2013.04.003 CrossRefPubMed

Espir CG, Nascimento-Mendes CA, Guerreiro-Tanomaru JM, Freire LG, Gavini G, Tanomaru-Filho M (2017) Counterclockwise or clockwise reciprocating motion for oval root canal preparation: a micro-CT analysis. Int Endod J. https://doi.org/10.1111/iej.12776 CrossRef

Pedullà E, Grande NM, Plotino G, Gambarini G, Rapisarda E (2013) Influence of continuous or reciprocating motion on cyclic fatigue resistance of 4 different nickel-titanium rotary instruments. J Endod 39:258–261. https://doi.org/10.1016/j.joen.2012.10.025 CrossRefPubMed

Amoroso-Silva P, Alcalde MP, Duarte MA et al (2016) Effect of finishing instrumentation using niti hand files on volume, surface area and uninstrumented surfaces in C-shaped root canal systems. Int Endod J 50:604–611. https://doi.org/10.1111/iej.12660 CrossRefPubMed

10.

Metzger Z, Zary R, Cohen R, Teperovich E, Paqué F (2010) The quality of root canal preparation and root canal obturation in canals treated with rotary versus self-adjusting files: a threedimensional micro-computed tomographic study. J Endod 36:1569–1573. https://doi.org/10.1016/j.joen.2010.06.003 CrossRefPubMed

11.

Moura-Netto C, Palo RM, Pinto LF, Mello-Moura AC, Daltoé G (2015) Wilhelmsen NS (2015) CT study of the performance of reciprocating and oscillatory motions in flattened root canal areas. Braz Oral Res 29:1–6. https://doi.org/10.1590/1807-3107BOR-2015.vol29.0006 CrossRefPubMed

12.

Wu MK, R’Oris A, Barkis D, Wesselink PR (2000) Prevalence and extent of long oval canals in the apical third. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 89:739–743. https://doi.org/10.1067/moe.2000.106344 CrossRefPubMed

13.

Jou YT, Karabucak B, Levin J, Liu D (2004) Endodontic working width: current concepts and techniques. Dent Clin N Am 48:323–335. https://doi.org/10.1016/j.cden.2003.12.006 CrossRefPubMed

14.

Versiani MA, Pécora JD, de Sousa-Neto MD (2011) Flat-oval root canal preparation with self-adjusting file instrument: a micro-computed tomography study. J Endod 37:1002–1007. https://doi.org/10.1016/j.joen.2011.03.017 CrossRefPubMed

15.

Siqueira JF Jr, Alves FR, Almeida BM, de Oliveira JC, Rôças IN (2010) Ability of chemomechanical preparation with either rotary instruments or self-adjusting file to disinfect oval-shaped root canals. J Endod 36:1860–1865. https://doi.org/10.1016/j.joen.2010.08.001 CrossRefPubMed

16.

Alves FR, Almeida BM, Neves MA, Moreno JO, Rôças IN, Siqueira JF Jr (2011) Disinfecting oval-shaped root canals: effectiveness of different supplementary approaches. J Endod 37:496–501. https://doi.org/10.1016/j.joen.2010.12.008 CrossRefPubMed

17.

De-Deus G, Belladonna FG, Silva EJ et al (2015) Micro-CT evaluation of non-instrumented canal areas with different enlargements performed by NiTi systems. Braz Dent J 26:624–629. https://doi.org/10.1590/0103-6440201300116 CrossRefPubMed

18.

Zuolo ML, Zaia AA, Belladonna FG, Silva EJNL, Souza EM, Versiani MA, Lopes RT, de-Deus G (2017) Micro-CT assessment of the shaping ability of four root canal instrumentation systems in oval-shaped canals. Int Endod J. https://doi.org/10.1111/iej.12810 CrossRef

19.

Alcalde MP, Tanomaru-Filho M, Bramante CM, Duarte MAH, Guerreiro-Tanomaru JM, Camilo-Pinto J, Só MVR, Vivan RR (2017) Cyclic and torsional fatigue resistance of reciprocating single files manufactured by different nickel-titanium alloys. J Endod 43:1186–1191. https://doi.org/10.1016/j.joen.2017.03.008 CrossRefPubMed

20.

Silva EJ, Villarino LS, Vieira VT et al (2016) Bending resistance and cyclic fatigue life of Reciproc, Unicone, and WaveOne reciprocating instruments. J Endod 42:1789–1793. https://doi.org/10.1016/j.joen.2016.08.026 CrossRefPubMed

21.

Busquim S, Cunha RS, Freire L, Gavini G, Machado ME, Santos M (2015) A micro-computed tomography evaluation of long-oval canal preparation using reciprocating or rotary systems. Int Endod J 48:1001–1006. https://doi.org/10.1111/iej.12398 CrossRefPubMed

22.

Sant’Anna Júnior A, Cavenago BC, Ordinola-Zapata R, de-Deus G, Bramante CM, Duarte MAH (2014) The effect of larger apical preparations in the danger zone of lower molars prepared using the Mtwo and Reciproc systems. J Endod 40:1855–1859. https://doi.org/10.1016/j.joen.2014.06.020 CrossRefPubMed

23.

Freire LG, Iglecias EF, Cunha RS, Dos Santos M, Gavini G (2015) Micro-computed tomographic evaluation of hard tissue debris removal after different irrigation methods and its influence on the filling of curved canals. J Endod 41:1660–1666. https://doi.org/10.1016/j.joen.2015.05.001 CrossRefPubMed

24.

da Silva Limoeiro AG, Dos Santos AH, De Martin AS et al (2016) Micro-computed tomographic evaluation of 2 nickel-titanium instrument systems in shaping root canals. J Endod 42:496–499. https://doi.org/10.1016/j.joen.2015.12.007 CrossRefPubMed

25.

Paqué F, Laib A, Gautschi H, Zehnder M (2009) Hard-tissue debris accumulation analysis by high-resolution computed tomography scans. J Endod 35:1044–1047. https://doi.org/10.1016/j.joen.2009.04.026 CrossRefPubMed

26.

Oliveira MA, Alves LD, Pereira AG, Raposo LH, Biffi JC (2015) Influence of flexion angle of files on the decentralization of oval canals during instrumentation. Braz Oral Res. 29:1–6. https://doi.org/10.1590/1807-3107BOR-2015.vol29.0078 CrossRefPubMed

27.

Coelho BS, Amaral RO, Leonardi DP et al (2016) Performance of three single instrument systems in the preparation of long oval canals. Braz Dent J 27:217–222. https://doi.org/10.1590/0103-6440201302449 CrossRefPubMed

28.

Çapar İD, Uysal B, Ok E, Arslan H (2015) Effect of the size of the apical enlargement with rotary instruments, single-cone filling, post space preparation with drills, fiber post removal, and root canal filling removal on apical crack initiation and propagation. J Endod 41:253–256. https://doi.org/10.1016/j.joen.2014.10.012 CrossRefPubMed

29.

Siqueira JF Jr, Lima KC, Magalhães FA, Lopes HP, de Uzeda M (1999) Mechanical reduction of the bacterial population in the root canal by three instrumentation techniques. J Endod 25:332–333. https://doi.org/10.1016/S0099-2399(06)81166-0 CrossRefPubMed

30.

Mickel AK, Chogle S, Liddle J, Huffaker K, Jones JJ (2007) The role of apical size determination and enlargement in the reduction of intracanal bacteria. J Endod 33:21–23. https://doi.org/10.1016/j.joen.2006.08.004 CrossRefPubMed

31.

Rollison S, Barnett F, Stevens RH (2002) Efficacy of bacterial removal from instrumented root canals in vitro related to instrumentation technique and size. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 94:366–371. https://doi.org/10.1067/moe.2002.126164 CrossRefPubMed

32.

Saini HR, Tewari S, Sangwan P, Duhan J, Gupta A (2012) Effect of different apical preparation sizes on outcome of primary endodontic treatment: a randomized controlled trial. J Endod 38:1309–1315. https://doi.org/10.1016/j.joen.2012.06.024 CrossRefPubMed

33.

Milanezi de Almeida M, Bernardineli N, Ordinola-Zapata R, Villas-Boas MH, Amoroso-Silva PA, Brandao CG, Guimaraes BM, Moraes IG, Hungaro-Duarte MA (2013) Micro–computed tomography analysis of the root canal anatomy and prevalence of oval canals in mandibular incisors. J Endod 19:1529–1533. https://doi.org/10.1016/j.joen.2013.08.033 CrossRef

34.

Leoni GB, Versiani MA, Pécora JD, Sousa-Neto MD (2014) Micro–computed tomographic analysis of the root canal morphology of mandibular incisors. J Endod 40:710–716. https://doi.org/10.1016/j.joen.2013.09.003 CrossRefPubMed

35.

Sampaio FC, Brito AP, Veloso HH, de Alencar AH, Decurcio DA, de Figueiredo JA, Estrela C (2017) Flute and shank dimensions of reciprocating instruments before and after simulated root canal shaping. J Contemp Dent Pract 18:198–204CrossRef

36.

Dietrich MA, Kirkpatrick TC, Yaccino JM (2012) In vitro canal and isthmus debris removal of the self-adjusting file, K3, and WaveOne files in the mesial root of human mandibular molars. J Endod 38:1140–1144. https://doi.org/10.1016/j.joen.2012.05.007 CrossRefPubMed

37.

Pedullà E, Plotino G, Grande NM, Avarotti G, Gambarini G, Rapisarda E, Mannocci F (2016) Shaping ability of two nickel-titanium instruments activated by continuous rotation or adaptive motion: a micro-computed tomography study. Clin Oral Investig 20:2227–2233. https://doi.org/10.1007/s00784-016-1732-4 CrossRefPubMed

38.

Hulsmann M, Peters OA, Dummer PMH (2005) Mechanical preparation of root canals: shaping goals, techniques and means. Endod Top 10:30–76CrossRef

Title: Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study
Authors: Camila Galletti Espir
Camila Almeida Nascimento-Mendes
Juliane Maria Guerreiro-Tanomaru
Bruno Cavalini Cavenago
Marco Antonio Hungaro Duarte
Mário Tanomaru-Filho
Publication date: 01-12-2018
Publisher: Springer Berlin Heidelberg
Published in: Clinical Oral Investigations / Issue 9/2018
Print ISSN: 1432-6981
Electronic ISSN: 1436-3771
DOI: https://doi.org/10.1007/s00784-018-2411-4

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Shaping ability of rotary or reciprocating systems for oval root canal preparation: a micro-computed tomography study

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

At a glance: The ONWARDS insulin icodec trials

Springer Medicine

Abstract

Objectives

Materials and methods

Results

Conclusions

Clinical relevance

Please log in to get access to this content

Other articles of this Issue 9/2018

Microbiological analysis and the outcomes of periodontal treatment with or without adjunctive systemic antibiotics—a retrospective study

Effectiveness and effect of non-vital bleaching on the quality of life of patients up to 6 months post-treatment: a randomized clinical trial

Dentinal tubule obliteration using toothpastes containing sodium trimetaphosphate microparticles or nanoparticles

Inflammatory serum markers up to 5 years after comprehensive periodontal therapy of aggressive and chronic periodontitis

The use of throat packs in pediatric cleft lip/palate surgery: a retrospective study

Retention rates and caries-preventive effects of two different sealant materials: a randomised clinical trial