Micro-CT analysis of two-dimensional and three-dimensional parameters in severely curved roots prepared with 3 instrumentation systems: An in vitro study

Abstract

Aim: This study analyzed the two-dimensional (2D) and three-dimensional (3D) parameters and canal transportation using micro-CT in roots prepared with three instrumentation systems preceded or not by glide path. Materials and Methods: Sixty mesial canals of mandibular molars with severe curvature angles (≥25°) were divided randomly (n = 10): G1-Twisted-file-adaptive (TFA); G2-Reciproc (RC); G3-One-Shape (OS); G4-ProGlider (PG)+TFA; G5-PG+RC; and G6-PG+OS. Area, perimeter, circularity, and major and minor diameters at the apical 5 mm and volume and surface area and canal transportation were evaluated. Data were analyzed using two-way analysis and Tukey's test (α = 0.05). Results: RC showed significantly higher areas and lower perimeters and diameters than TFA (P < 0.001). Increases in root canal volumes promoted by RC and OS were similar (P = 0.979). There was no statistically significant difference in canal transportation (P = 0.083). RC generally promoted major changes in the 2D and 3D parameters. Conclusions: The RC system caused a significantly higher perimeter and area increase than the TFA system. The preceding use of PG in the instrumentation techniques did not influence the evaluated parameters.

Keywords

Endodontics - instrumentation systems - micro-CT scan - root canal preparation - severely curved roots

Publication History

Article published online:
01 November 2021

• References

• 1 Gluskin AH. Anatomy of an overfill: A reflection on the process. Endod Topics 2007;16:64-81.
• 2 Jain A, Asrani H, Singhal AC, Bhatia TK, Sharma V, Jaiswal P. Comparative evaluation of canal transportation, centering ability, and remaining dentin thickness between WaveOne and ProTaper rotary by using cone beam computed tomography: Anin vitrostudy. J Conserv Dent 2016;19:440-4.
• 3 Siqueira JF Jr., Pérez AR, Marceliano-Alves MF, Provenzano JC, Silva SG, Pires FR, et al. What happens to unprepared root canal walls: A correlative analysis using micro-computed tomography and histology/scanning electron microscopy. Int Endod J 2018;51:501-8.
• 4 Siqueira JF Jr., Rôças IN. Clinical implications and microbiology of bacterial persistence after treatment procedures. J Endod 2008;34:1291-301.e3.
• 5 Shen Y, Zhou HM, Zheng YF, Peng B, Haapasalo M. Current challenges and concepts of the thermomechanical treatment of nickel-titanium instruments. J Endod 2013;39:163-72.
• 6 Capar ID, Arslan H, Akcay M, Ertas H. Anin vitrocomparison of apically extruded debris and instrumentation times with ProTaper Universal, ProTaper Next, Twisted File Adaptive, and HyFlex instruments. J Endod 2014;40:1638-41.
• 7 Neelakantan P, Reddy P, Gutmann JL. Cyclic fatigue of two different single files with varying kinematics in a simulated double-curved canal. J Investig Clin Dent 2016;7:272-7.
• 8 Bürklein S, Benten S, Schäfer E. Shaping ability of different single-file systems in severely curved root canals of extracted teeth. Int Endod J 2013;46:590-7.
• 9 Karataş E, Gündüz HA, Kırıcı DÖ, Arslan H, Topçu MÇ, Yeter KY. Dentinal crack formation during root canal preparations by the twisted file adaptive, ProTaper Next, ProTaper Universal, and WaveOne instruments. J Endod 2015;41:261-4.
• 10 Capar ID, Ertas H, Ok E, Arslan H, Ertas ET. Comparative study of different novel nickel-titanium rotary systems for root canal preparation in severely curved root canals. J Endod 2014;40:852-6.
• 11 Ordinola-Zapata R, Bramante CM, Duarte MA, Cavenago BC, Jaramillo D, Versiani MA. Shaping ability of reciproc and TF adaptive systems in severely curved canals of rapid microCT-based prototyping molar replicas. J Appl Oral Sci 2014;22:509-15.
• 12 Plotino G, Giansiracusa Rubini A, Grande NM, Testarelli L, Gambarini G. Cutting efficiency of Reciproc and WaveOne reciprocating instruments. J Endod 2014;40:1228-30.
• 13 Gergi R, Osta N, Bourbouze G, Zgheib C, Arbab-Chirani R, Naaman A. Effects of three nickel titanium instrument systems on root canal geometry assessed by micro-computed tomography. Int Endod J 2015;48:162-70.
• 14 Keskin C, Sarıyılmaz E, Demiral M. Shaping ability of reciproc blue reciprocating instruments with or without glide path in simulated S-shaped root canals. J Dent Res Dent Clin Dent Prospects 2018;12:63-7.
• 15 Versiani MA, Pécora JD, Sousa-Neto MD. Microcomputed tomography analysis of the root canal morphology of single-rooted mandibular canines. Int Endod J 2013;46:800-7.
• 16 Zheng L, Ji X, Li C, Zuo L, Wei X. Comparison of glide paths created with K-files, PathFiles, and the ProGlider file, and their effects on subsequent WaveOne preparation in curved canals. BMC Oral Health 2018;18:152.
• 17 Hülsmann M, Peters OA, Dummer PM. Mechanical preparation of root canals: Shaping goals, techniques and means. Endod Topics 2005;10:30-76.
• 18 Rhodes SC, Hülsmann M, McNeal SF, Beck P, Eleazer PD. Comparison of root canal preparation using reciprocating safesiders stainless steel and Vortex nickel-titanium instruments. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2011;111:659-67.
• 19 Rubini AG, Sannino G, Pongione G, Testarelli L, Al Sudani D, Jantarat J, et al. Influence of file motion on cyclic fatigue of new nickel titanium instruments. Ann Stomatol (Roma) 2013;4:149-51.
• 20 Kakoli P, Nandakumar R, Romberg E, Arola D, Fouad AF. The effect of age on bacterial penetration of radicular dentin. J Endod 2009;35:78-81.
• 21 Saber SE, Schäfer E. Incidence of dentinal defects after preparation of severely curved root canals using the Reciproc single-file system with and without prior creation of a glide path. Int Endod J 2016;49:1057-64.
• 22 Alovisi M, Cemenasco A, Mancini L, Paolino D, Scotti N, Bianchi CC, et al. Micro-CT evaluation of several glide path techniques and ProTaper Next shaping outcomes in maxillary first molar curved canals. Int Endod J 2017;50:387-97.
• 23 Vorster M, van der Vyver PJ, Paleker F. Canal transportation and centering ability of WaveOne gold in combination with and without different glide path techniques. J Endod 2018;44:1430-5.
• 24 Aydın ZU, Keskin NB, Özyürek T, Geneci F, Ocak M, Çelik HH. Microcomputed assessment of transportation, centering ratio, canal area, and volume increase after single-file rotary and reciprocating glide path instrumentation in curved root canals: A laboratory study. J Endod 2019;45:791-6.
• 25 Ruddle CJ, Machtou P, West JD. Endodontic canal preparation: Innovations in glide path management and shaping canals. Dent Today 2014;33:118-23.
• 26 Bürklein S, Benten S, Schäfer E. Quantitative evaluation of apically extruded debris with different single-file systems: Reciproc, F360 and OneShape versus Mtwo. Int Endod J 2014;47:405-9.
• 27 Zhang EW, Cheung GS, Zheng YF. Influence of cross-sectional design and dimension on mechanical behavior of nickel-titanium instruments under torsion and bending: A numerical analysis. J Endod 2010;36:1394-8.
• 28 Brasil SC, Marceliano-Alves MF, Marques ML, Grillo JP, Lacerda MF, Alves FR, et al. Canal transportation, unprepared areas, and dentin removal after preparation with BT-RaCe and ProTaper next systems. J Endod 2017;43:1683-7.
• 29 Kirchhoff AL, Chu R, Mello I, Garzon AD, dos Santos M, Cunha RS. Glide path management with single-and multiple-instrument rotary systems in curved canals: A micro-computed tomographic study. J Endod 2015;41:1880-3.
• 30 Prati C, Foschi F, Nucci C, Montebugnoli L, Marchionni S. Appearance of the root canal walls after preparation with NiTi rotary instruments: A comparative SEM investigation. Clin Oral Investig 2004;8:102-10.