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Journal articles on the topic 'Curved root canals'

Author: Grafiati

Published: 4 June 2021

Last updated: 10 February 2022

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1

Chenail, Bruce L., and Paul E. Teplitsky. "Endosonics in curved root canals." Journal of Endodontics 11, no. 9 (1985): 369–74. http://dx.doi.org/10.1016/s0099-2399(85)80022-4.

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2

Juhasz, Alexander, Csaba Hegedus, Ildiko Marton, Balazs Benyo, Kaan Orhan, and Csaba Dobó-Nagy. "Effectiveness of Parameters in Quantifying Root Canal Morphology Change after Instrumentation with the Aid of a Microcomputed Tomography." BioMed Research International 2019 (July 2, 2019): 1–6. http://dx.doi.org/10.1155/2019/9758176.

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The objective of this study was to analyse the effectiveness of some parameters which characterise the change in morphology in human root canals subjected to ProTaper rotary enlargement with the help of an X-ray microfocus computed tomography (MCT) and to introduce a novel parameter that is effective in quantifying changes in root canal morphology. Ten each straight and curved root canals with mature apices chosen from extracted human upper incisor and canine teeth were scanned with MCT before and after canal shaping using ProTaper rotary instruments in order to facilitate three-dimensional di

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3

Estrela, Carlos, Mike R. Bueno, Fernando B. Barletta, et al. "Identification of Apical and Cervical Curvature Radius of Human Molars." Brazilian Dental Journal 26, no. 4 (2015): 351–56. http://dx.doi.org/10.1590/0103-64402013x0252.

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<p>To determine the frequency of apical and cervical curvatures in human molars using the radius method and cone-beam computed tomography (CBCT) images. Four hundred images of mandibular and maxillary first and second molars were selected from a database of CBCT exams. The radius of curvature of curved root canals was measured using a circumcenter based on three mathematical points. Radii were classified according to the following scores: 0 - straight line; 1 - large radius (r>8 mm, mild curvature); 2 - intermediate radius (r>4 and r<8 mm, moderate curvature); and 3 - small radi

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4

Pécora, Jesus Djalma, and Alexandre Capelli. "Shock of paradigms on the instrumentation of curved root canals." Brazilian Dental Journal 17, no. 1 (2006): 3–5. http://dx.doi.org/10.1590/s0103-64402006000100001.

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This paper makes a practical analysis about the paradigm on the instrumentation of curved root canals. In Endodontics, a paradigm has been created. Theories and techniques for instrumentation of curved root canals state that the use of a #25 file in the apical portion fulfills all the requirements for cleaning and shaping of the root canal system. Every scientific theory or paradigm should be continuously opened to modifications or refutation. The existence of extremely flexible instruments fabricated from metal alloys, methods for accurate determination of the real anatomic diameter and achie

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5

Chenail, Bruce L., and Paul E. Teplitsky. "Endosonics in curved root canals. Part II." Journal of Endodontics 14, no. 5 (1988): 214–17. http://dx.doi.org/10.1016/s0099-2399(88)80172-9.

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6

Oh, Young-Ryul, Hye-Min Ku, Dohyun Kim, Su-Jung Shin, and Il-Young Jung. "Efficacy of a Nickel-Titanium Ultrasonic Instrument for Biofilm Removal in a Simulated Complex Root Canal." Materials 13, no. 21 (2020): 4914. http://dx.doi.org/10.3390/ma13214914.

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This study evaluated the effectiveness of NiTi ultrasonic tips for Enterococcus faecalis (E. faecalis) biofilm removal in simulated complex root canals. Sixty root canal models consisting of a 30-degree curved main canal and two lateral canals were constructed from polydimethylsiloxane and incubated with E. faecalis. Irrigants in root canals were activated using a manual syringe (SI), a stainless steel (SS) instrument, a nickel-titanium (Ni-Ti) ultrasonic instrument, or a sonic instrument (EA). Instruments of SI, SS, and NiTi-9 groups were placed 9 mm from the apex, whereas those in NiTi-2 and

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7

Mustaffa, Musliana, Hajar Ar Rahmah Nasri, Insyirah Kamarulzaman, and Mohamad Shafiq Mohd Ibrahim. "GuttaFlow Bioseal as Monocone Obturation Technique in Curved Root Canals: A Scanning Electron Microscopy Study." Science Letters 15, no. 2 (2021): 42–59. http://dx.doi.org/10.24191/sl.v15i2.13824.

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The obturation quality of GuttaFlow Bioseal in curved root canals is not commonly investigated although there has been a current approach toward utilizing this material in extracted molars in recent years. This study assessed the obturated surface area, extrusion of root filling material beyond the apical foramen and duration of obturation procedure in curved root canals using monocone obturation technique. Access cavity was prepared in 20 human mandibular molars. Root canals with curvature of more than 10 as determined according to Schneider’s method were included. Samples were prepared usin

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8

Hudson, David A., Nijole A. Remeikis, and Joseph E. Van Cura. "Instrumentation of curved root canals: A comparison study." Journal of Endodontics 18, no. 9 (1992): 448–50. http://dx.doi.org/10.1016/s0099-2399(06)80847-2.

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9

D'Amario, Maurizio, Francesco De Angelis, Maddalena Mancino, Massimo Frascaria, Mario Capogreco, and Camillo D'Arcangelo. "Canal shaping of different single-file systems in curved root canals." Journal of Dental Sciences 12, no. 4 (2017): 328–32. http://dx.doi.org/10.1016/j.jds.2017.03.001.

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10

Uppin, Veerendra, Vinaya Varghese, Madhu Pujar, Nirmal Kurian, and Hemant Vagarali. "Comparison of Canaltransportation and Centering Ability of Protaper Next, Hyflex Cmandwave One System Using Cone - Beam Computed Tomography-an in-Vitro Study." Dental Journal of Advance Studies 04, no. 02 (2016): 088–93. http://dx.doi.org/10.1055/s-0038-1672052.

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Abstract Objective: The aim of the study was to compare the canal transportation and centering ability of Rotary ProTaper Next, Hyflex CM and Wave One primary systems using cone beam computed tomography (CBCT) in curved root canals. Materials and Methods: Total 30 freshly extracted maxillary first molars having root canals with curvature between 10°- 20° were divided into three groups of 10 teeth each. All teeth were scanned by CBCT to determine the root canal shape before instrumentation. In Group 1, the canals were prepared with ProTaper Next files, in Group 2 with Hyflex CM files and in Gro

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11

Beljic-Ivanovic, Katarina, and Vladimir Ivanovic. "Anatomical features of the palatal root canal in maxillary first molars and their influence on endodontic procedure." Serbian Dental Journal 55, no. 1 (2008): 43–53. http://dx.doi.org/10.2298/sgs0801043b.

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Introduction: More detailed acquaintance with specialist endodontic literature and treating complicated endodontic cases have revealed that the palatal root canal in maxillary first molars has different features from generally accepted simplicity. Aim: The aim of this study was to investigate the number, orientation and shape of the curvature of the palatal root canal in maxillary first molars, characteristics that may have great influence on the procedure and outcome of endodontic therapy. Materials and methods: Material consisted of 100 left and 100 right extracted human first maxillary mola

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12

Türker, Sevinç Aktemur, and Emel Uzunoglu. "Comparison of Canal Transportation, Centering Ratio by Cone-beam Computed Tomography after Preparation with Different File Systems." Journal of Contemporary Dental Practice 16, no. 5 (2015): 360–65. http://dx.doi.org/10.5005/jp-journals-10024-1690.

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ABSTRACT Aim One Shape Apical 1 (OSA 1) is a new file for preparing the apical aspect of the root canal after One Shape (OS, Micro Mega, Besançon, France). This study compared apical transportation and centering ratios in curved root canals, which were instrumented with ProTaper Next (PTN, Dentsply Tulsa Dental Specialties, Tulsa, OK) up to size X3 and with OS up to OSA 1. Materials and methods Forty-eight mesial canals of mandibular molars were assigned into two groups (n = 24) with respect to canal length and curvature. Root canals were accessed conventionally and preperation was completed w

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13

Alfadley, Abdulmohsen, Abdalrhman Alrajhi, Hamad Alissa, et al. "Shaping Ability of XP Endo Shaper File in Curved Root Canal Models." International Journal of Dentistry 2020 (February 17, 2020): 1–6. http://dx.doi.org/10.1155/2020/4687045.

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The aim of this study was to assess the shaping ability of the XP Shaper (XPS) file in severely curved canal models under simulated body temperature and compare it with that of the WaveOne Gold (WOG) file. Ninety-six simulated root canals were equally distributed into XPS and WOG systems to be shaped by eight files each. Files were assessed under a stereomicroscope prior to canal shaping to detect deformation if any. The canals were shaped at 35 ± 1°C using the X-Smart Plus motor. Images of the canals were obtained before and after instrumentation using a stereomicroscope to measure the amount

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14

Huang, Zhuwei, Jingjing Quan, Jia Liu, Wen Zhang, Xiaolei Zhang, and Xiaoli Hu. "A microcomputed tomography evaluation of the shaping ability of three thermally-treated nickel-titanium rotary file systems in curved canals." Journal of International Medical Research 47, no. 1 (2018): 325–34. http://dx.doi.org/10.1177/0300060518801451.

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Objective To evaluate the shaping ability of three thermally-treated rotary nickel-titanium (NiTi) systems including ProTaper Next (PTN), HyFlex™ CM (HFCM) and HyFlex™ EDM (HFEDM) during root canal preparation in simulated root canals. Methods A total of 45 simulated root canals were divided into three groups ( n = 15) and prepared with PTN, HFCM or HFEDM files up to size 25. Microcomputed tomography (microCT) was used to scan the specimens before and after instrumentation. Volume and diameter changes, transportations and centring ratios at 11 levels of the simulated root canals were measured

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15

Gencoglu, Nimet, and Dilek Helvacioglu. "Comparison of the Different Techniques to Remove Fractured Endodontic Instruments from Root Canal Systems." European Journal of Dentistry 03, no. 02 (2009): 90–95. http://dx.doi.org/10.1055/s-0039-1697413.

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ABSTRACTObjectives: To evaluate the success of certain methods that can be used in the removal of separated instruments from different levels in curved and straight canals.Methods: Instrument removal attempts were undertaken on 63 straight and 30 curved canals containing a pre-fractured instrument using the ultrasonics under the visualization of an operating microscope or conventional methods. In straight canals, a Masseran Kit was additionally used to these techniques. The success of instrument removal in relation to the techniques used and the location of the fragments in the root canal were

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16

Wigler, Ronald, Tal Koren, and Igor Tsesis. "Evaluation of Root Canal Cleaning and Shaping Efficacy of Three Engine-driven Instruments: SafeSider, ProTaper Universal and Lightspeed LSX." Journal of Contemporary Dental Practice 16, no. 11 (2015): 910–14. http://dx.doi.org/10.5005/jp-journals-10024-1780.

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ABSTRACT Aim To compare the cleaning effectiveness and shaping ability of SafeSider, ProTaper Universal and Lightspeed rotary instruments during the preparation of curved root canals in extracted human teeth. Materials and methods A total of 63 roots with curved root canals were divided into three groups. Canals were prepared using SafeSider, ProTaper Universal or Lightspeed LSX. Using pre- and post-instrumentation radiographs, straightening of the canal curvatures and loss of working length were determined with a computer image analysis program. The amounts of debris at the apical 5 mm were q

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17

Olek, Tomasz, Władysław P. Węglarz, Agata Trzcionka, Arkadiusz Dziedzic, and Marta Tanasiewicz. "Magnetic Resonance Imaging for Assessment of Endodontic Instruments’ Precision during “L-Shaped” Model Root Canals Preparation." Applied Sciences 11, no. 3 (2021): 1051. http://dx.doi.org/10.3390/app11031051.

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The purpose of the mechanical root canal preparation is to clean it and give it the right shape. The preparation should be carried out in a way that maintains the original curvature and initial orientation of the apical end. Insufficient root canal preparation may prevent effective chemical decontamination and obturation to the full working length. The study aims to evaluate the shaping ability and effectiveness of the NiTi rotary and reciprocating endodontic instruments, compared to standard hand files using magnetic resonance imaging based on spin echo. Material and methods: A comparative st

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18

Choi, Yoomin, Seonmi Kim, and Namki Choi. "Assessment of Root and Root Canal Morphology of Human Primary Molars using CBCT." JOURNAL OF THE KOREAN ACADEMY OF PEDTATRIC DENTISTRY 47, no. 1 (2020): 25–35. http://dx.doi.org/10.5933/jkapd.2020.47.1.25.

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The purpose of this study is to evaluate the morphological characteristics of the roots and roots canals of primary molar teeth using Cone-Beam Computed Tomography (CBCT).<br/>A total of 68 CBCT images of children aged 4 - 5 years was used for this study. A total of 160 molar teeth were analyzed. Various parameters such as the number of roots and canals, length of root and root canal, and the angulation and shape of the roots were analyzed.<br/>All maxillary primary molars had 3 roots. The presence of 2 root canals in 1 root was only observed in the mesiobuccal root of maxillary pr

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19

Briseño, B. M. "RS 70 A prototype of root canal instrument for the preparation of curved root canals." Journal of Endodontics 20, no. 4 (1994): 205. http://dx.doi.org/10.1016/s0099-2399(06)80403-6.

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20

Kuzekanani, Maryam, Faranak Sadeghi, Nima Hatami, Maryam Rad, Mansoureh Darijani, and Laurence James Walsh. "Comparison of Canal Transportation, Separation Rate, and Preparation Time between One Shape and Neoniti (Neolix): An In Vitro CBCT Study." International Journal of Dentistry 2021 (September 7, 2021): 1–6. http://dx.doi.org/10.1155/2021/6457071.

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Purpose. This in vitro study compared root canal preparation in curved mesiobuccal canals of molar teeth using either the One Shape™ or the Neoniti (Neolix) rotary NiTi single-file systems, assessing canal transportation, instrument separation and time required for preparation. Methods. Extracted maxillary and mandibular human molar teeth with mesiobuccal canals having apical angles of curvature between 25 and 35o were selected and embedded in acrylic resin blocks, and an initial CBCT was taken. The teeth were divided into two equal groups (n = 20), and the canals were cleaned and shaped using

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21

De, Lima, Giselle Nevares, Felipe Xavier, Ferraz Gominho, and Albuquerque de. "A comparative study of protaper and twisted file nickel titanium instruments in curved canals preparation." Serbian Dental Journal 60, no. 4 (2013): 175–82. http://dx.doi.org/10.2298/sgs1304175d.

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Introduction. Root canal instrumentation is performed to achieve cleaning and shaping with maximum preservation of its original anatomy. However, in curved canals this approach may cause excessive damage or canal transportation. The present study aimed to evaluate changes in dentin wall caused by instrumentation of curved canals using two nickel titanium rotary systems, ProTaper and Twisted File. Material and Methods. Twenty five extracted human mandibular first molars with two separated mesial root canals were selected. Distal roots were amputated and 50 canals (25 mesiobuccal and 25 mesiolin

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22

YİĞİT ÖZER, Senem, Özkan ADIGÜZEL, and Sadullah KAYA. "Removal of Debris and Smear Layer in Curved Root Canals Using Self-Adjusting File with Different Operation Times – A Scanning Electron Microscope Study." International Dental Research 1, no. 1 (2011): 1. http://dx.doi.org/10.5577/intdentres.2011.vol1.no1.1.

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Aim: Debridement during root canal treatment is mandatory and it is provided by means of chemomechanical instrumentation and irrigation methods. This article analysis the debridement capacity of a novel system, SAF and its special irrigation device when used with different operation times in curved root canals. Methodology: 30 mesiobuccal root canals of maxillary molars were instrumented using SAF. Teeth were divided into three groups. In Group 1, 10 new SAF files were used for operation for 4 minutes. In Group 2, the 4-min previously used SAF files were operated in the same manner. In G

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Turkaydin, Dilek Erbay, Mahir Gunday, Hesna Sazak Ovecoğlu, and Yıldız Garıp. "Canal Centring Ability of ProTaper and Mtwo Rotary Systems in Curved Canals." Balkan Journal of Dental Medicine 18, no. 2 (2014): 89–92. http://dx.doi.org/10.1515/bjdm-2015-0014.

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SUMMARYThe purpose of this investigation was to compare centring ratio of ProTaper and Mtwo rotary systems. 60 mandibular molar teeth which had 25, 30 and 35 degree curvature in mesio-buccal root canal were used. Group 1 had 25°, Group 2 had 30°, and Group 3 had 35° curvatures. The roots were sectioned horizontally at 2 mm away from the apex. The apical region was then observed under a stereo-microscope. In each group, teeth were instrumented using ProTaper and Mtwo systems. After canal preparation, digital images of apical part of canals were taken. These images were then superimposed by usin

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ISOM, T., J. MARSHALL, and J. BAUMGARTNER. "Evaluation of root thickness in curved canals after flaring." Journal of Endodontics 21, no. 7 (1995): 368–71. http://dx.doi.org/10.1016/s0099-2399(06)80972-6.

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Bou Dagher, Fadia E., and Ghassan M. Yared. "Comparison of three files to prepare curved root canals." Journal of Endodontics 21, no. 5 (1995): 264–65. http://dx.doi.org/10.1016/s0099-2399(06)80994-5.

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26

Leonardi, Denise Piotto, Gilson Blitzkow Sydney, Mario Tanomaru Filho, Flares Baratto-Filho, Samantha Schaffer Pugsley Baratto, and Paulo Sergio Cerri. "Performance of RaCe Instrumentation System in Curved Root Canals: A Comprehensive Analysis by Three Study Methods." Brazilian Dental Journal 24, no. 3 (2013): 230–34. http://dx.doi.org/10.1590/0103-6440201301920.

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In this study, curved maxillary molar root canals were instrumented with RaCe rotary system to evaluate: 1. the occurrence of canal transportation using a radiographic platform; 2. the action of the instruments on the dentin walls, centering ability and canal enlargement by analysis of digital images; and the percentage of regular dentin surfaces and debris within the canal by histological analysis. Ten mesiobuccal roots of extracted human maxillary molars were embedded in acrylic resin and sectioned at the middle and apical thirds. Root canal shaping was performed using the RaCe rotary system

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27

Mamede-Neto, Iussif, Álvaro Henrique Borges, Ana Helena Gonçalves Alencar, Marco Antonio Hungaro Duarte, Manoel Damião Sousa Neto, and Carlos Estrela. "Multidimensional Analysis of Curved Root Canal Preparation Using Continuous or Reciprocating Nickel-titanium Instruments." Open Dentistry Journal 12, no. 1 (2018): 32–45. http://dx.doi.org/10.2174/1874210601812010032.

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Objective: To evaluate transportation (T) and centering ability (CA) of root canal preparations using continuous or reciprocating nickel-titanium endodontic files. Materials and Methods: Ninety-six mesiobuccal root canals of mandibular first and second molars were randomly divided into 6 groups (n=16) according to the rotary file used: 1. ProTaper Next; 2. ProTaper Gold; 3. Mtwo; 4. BioRaCe; 5. WaveOne Gold; 6. Reciproc. Root canals were prepared according to manufacturer’s instructions. Cone beam computed tomography scans were obtained before and after root canal preparation. Measurements wer

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28

de Carvalho, Fredson Marcio Acris, Leonardo Cantanhede de Oliveira Gonçalves, André Augusto Franco Marques, Vanessa Alves, Carlos Eduardo da Silveira Bueno, and Alexandre Sigrist De Martin. "Cleaning Effectiveness of a Reciprocating Single-file and a Conventional Rotary Instrumentation System." Open Dentistry Journal 10, no. 1 (2016): 704–13. http://dx.doi.org/10.2174/1874210601610010704.

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Objective: To compare cleaning effectiveness by histological analysis of a reciprocating single-file system with ProTaper rotary instruments during the preparation of curved root canals in extracted teeth. Methods: A total of 40 root canals with curvatures ranging between 20 - 40 degrees were divided into two groups of 20 canals. Canals were prepared to the following apical sizes: Reciproc size 25 (n=20); ProTaper: F2 (n=20). The normal distribution of data was tested by the Kolmogorov-Smirnov test and the values obtained for the test (Mann-Whitney U test, P < .05) were statistically analyz

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29

Pérez-Alfayate, Ruth, Montse Mercade, Juan Algar-Pinilla, Rafael Cisneros-Cabello, Federico Foschi, and Stephen Cohen. "Root Canal Filling Quality Comparison of a Premixed Calcium Silicate Endodontic Sealer and Different Carrier-Based Obturation Systems." Journal of Clinical Medicine 10, no. 6 (2021): 1271. http://dx.doi.org/10.3390/jcm10061271.

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Background: The number of voids within the root canal obturation is a relevant parameter to describe the quality of the technique, as well as to predict long-term prognosis. The aim of this study was to evaluate the quality of root canal obturation in curved root canals filled with Thermafil, GuttaCore, GuttaFusion and lateral compaction with AH Plus and EndoSequence BC sealer, by means of percentage of gutta-percha and sealer filled area. Methods: 200 curved canals of mandibular molars were divided in five groups (n = 40). Each specimen was evaluated at 3, 6 and 9 mm from the apex. A total of

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Krutika Kiran, Kadam, Vagarali Hemant, Pujar Madhu A, Tamase Aishwarya S, and Sahana Umesh. "Comparative evaluation of shaping ability of trunatomy and protaper gold files in curved canals using cone?beam computed tomography: An invitro study." IP Indian Journal of Conservative and Endodontics 6, no. 2 (2021): 101–5. http://dx.doi.org/10.18231/j.ijce.2021.023.

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This study aimed to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with TruNatomy (TN) (TN; Dentsply Sirona, Maillefer, Ballaigues, Switzerland) and ProTaper Gold (PG) (PG; Dentsply, Tulsa Dental Specialties, Tulsa, OK, USA) files using cone‑beam computed tomography (CBCT). 30 Single rooted extracted human teeth with root curvature ranging from 20-30° according to Schneider’s method were selected. Teeth with any visible cracks or fractures, calcifications, previous root canal treatments were excluded. The teeth were r

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31

Rocha, Mariana Santoro, Brenda Leite Muniz, Marianna Fernandes Carapiá, et al. "Transportation assessment in simulated curved canals after retreatment with rotary and reciprocating systems." Revistas 74, no. 3 (2017): 187. http://dx.doi.org/10.18363/rbo.v74n3.p.187.

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Objective: this study evaluated the ability of rotary (ProTaper-Retreatment and Mtwo-Retreatment) and reciprocating (Reciproc and WaveOne) systems in maintaining the original shape of the canal after root canal retreatment. Material and Methods: forty curved resin blocks with simulated root canals were prepared and filled. After that, each block was randomly assigned to 4 groups (n = 10) according to the retreatment system used. Stereomicroscopic images from each block were taken before and after retreatment procedures. Evaluation of canal transportation was obtained for all canal length and f

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32

Cimpean, Sanda Ileana, Adrian Mihai Varvara, Smaranda Dana Buduru, et al. "CBCT Evaluation of Changes in Root Canal Geometry Induced by the Chemical Structure of NiTi Alloys of Three Rotary Systems." Revista de Chimie 71, no. 6 (2020): 170–77. http://dx.doi.org/10.37358/rc.20.6.8181.

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Preservation of the root canal anatomy is very important for the success of endodontic treatment.Properly instrumentation of curvet root canals is influenced by flexibility of endodontic instruments which depends on composition and thermomechanical treatment of the metallic alloy. The aim of the current study was to compare the changes in root canal geometry after the preparation with two systems that work in reciprocating motion (Reciproc25, Primary Wave One) and another one in continuous rotation (One Shape), using CT measurements. Forty-five canals of extracted molars with curvatures rangin

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33

Kovacs Ivacson, Andrea Csinszka, Mariana Pacurar, Monica Monea, et al. "Efficiency of Different Nickel-Titanium Endodontic File Systems in Cleaning and Apical Transportation of Simulated Curved Root Canals." Revista de Chimie 68, no. 5 (2017): 957–61. http://dx.doi.org/10.37358/rc.17.5.5589.

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The use of nickel-titanium instruments have become an important part of the root canal treatment, in order to facilitate the cleaning and shaping of root canals, because the incorrect utilization of the endodontic files during endodontic treatment may produce unwanted procedural errors. The aim of this study was to evaluate on simulated curved root canal models the cleaning efficiency and the apical transportation in three reference areas of the root canal files, ProTaper (Dentsply Maillefer), K3XF (Sybron Endo) and HyFlex (Coltene Endo) systems, compared to the hand K-files (DentsplyMaillefer

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Zarpelon, Fernanda Inês, Eduardo Nesello Barp, Daniel Galafassi, and Tiago André Fontoura de Melo. "Analysis of preparation time, wear, transportation and centering ability of Flexofile and Prodesign® M manual instruments in curved root canals preparation." Revista Odonto Ciência 33, no. 1 (2018): 58. http://dx.doi.org/10.15448/1980-6523.2018.1.29468.

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OBJECTIVE: This in vitro study aimed to evaluate preparation time, wear, transportation, and centering ability of two manual instruments, namely Flexofile and Prodesign® M, in curved root canal preparation.METHODS: Forty mesiobuccal and mesiolingual canals of the first or second lower molars were used, with standard length, degree, and radius of curvature among all samples. The canals were randomly divided into two experimental groups (n=20) according to the preparation instrument analyzed. The preparations were performed by a single operator. The preparation time was controlled, and the value

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35

Rouhani, Armita, Jamileh Ghoddusi, Neda Naghavi, and Ghadir Al-Lawati. "Scanning electron microscopic evaluation of dentinal tubule penetration of Epiphany in severely curved root canals." European Journal of Dentistry 07, no. 04 (2013): 423–28. http://dx.doi.org/10.4103/1305-7456.120673.

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ABSTRACT Objective: The purpose of this study was to compare the depth of dentinal tubule sealer penetration in the apical thirds of severely curved root canals obturated with Resilon/Epiphany self-etch (SE) or gutta-percha/AH Plus using scanning electron microscopy. Materials and Methods: A total of 34 extracted human mandibular molars with 25-40° curvature of the mesial root canal were selected for this study. After preparation, the mesiobuccal canals were randomly obturated with gutta-percha and AH Plus sealer or Resilon and Epiphany SE sealer. Sealer penetration was evaluated in 2 mm secti

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Pinto, Jader Camilo, Fernanda Ferrari Esteves Torres, Airton Oliveira Santos-Junior, Marco Antonio Hungaro Duarte, Juliane Maria Guerreiro-Tanomaru, and Mario Tanomaru-Filho. "Safety and Effectiveness of Additional Apical Preparation using a Rotary Heat-treated Nickel–Titanium file with Larger Diameter and Minimum Taper in Retreatment of Curved Root Canals." European Journal of Dentistry 15, no. 02 (2021): 247–52. http://dx.doi.org/10.1055/s-0041-1723065.

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Abstract Objective The aim of this study was to investigate the effect of additional apical preparation using the ProDesign Logic (PDL) 50/.01 rotary heat-treated nickel–titanium (NiTi) file with a larger diameter and minimal taper for retreatment of curved root canals. Materials and Methods Mesial curved root canals of 12 mandibular molars were prepared using PDL 25/.06 and filled using the continuous wave of condensation technique and AH Plus sealer. After retreatment using ProDesign S (PDS) 25/.08, PDL 25/.06 and PDL 35/05, a complementary procedure was performed with PDL 50/.01. Microcompu

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Pillay, Maheshan, Martin Vorster, and Peet J. Van der Vyver. "Fracture of endodontic instruments - Part 1: Literature review on factors that influence instrument breakage." South African Dental Journal 75, no. 10 (2020): 553–63. http://dx.doi.org/10.17159/2519-0105/2020/v75no10a4.

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Instrument fracture is a serious complication during endodontic treatment of teeth, having an adverse effect on the outcome of the nickel titanium (NiTi) treatment, especially if the fracture prevents apical access to the infected root canal. Despite the advent of NiTi files, the risk of fracture during the endodontic preparation of root canals, especially in severely curved canals, remains a serious concern. The fracture of NiTi files during preparation may result in a compromised prognosis for the tooth. In the presence of periapical lesions, instrument fracture may reduce the chances of suc

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Gajoum, Abdulrzag, Ebrahim Patel, Ismail E. Munshi, and Saidah Tootla. "A comparison of root canal transportation and centering ability between WaveOne® Gold and Protaper Next® files, using microcomputed tomography." South African Dental Journal 76, no. 1 (2021): 22–27. http://dx.doi.org/10.17159/2519-0105/2021/v76no1a3.

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This study compared the transportation and centering ability of ProTaper Next (PTN) and WaveOne Gold (WOG) files in curved permanent teeth using micro-computed tomography (μCT). Twenty-four molar teeth with curved roots were divided randomly into two equal groups. The root canals of one group was prepared using PTN files, and the other using WOG files. Pre-instrumentation and post-instrumentation μCT imaging were taken for all the teeth. The dentine thickness of the pre-and the post-instrumentation cross sections was measured at eight different points at three levels: 3, 5 and 7mm from the ape

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Pereira, Érika Sales Joviano, Isabella Faria da Cunha Peixoto, Rodrigo Keigo Lopes Nakagawa, Vicente Tadeu Lopes Buono, and Maria Guiomar de Azevedo Bahia. "Cleaning the apical third of curved canals after different irrigation protocols." Brazilian Dental Journal 23, no. 4 (2012): 351–56. http://dx.doi.org/10.1590/s0103-64402012000400007.

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This study evaluated the protocols of sonic and vacuum irrigation regarding the capacity of debris removal from root canal systems. Canal preparations were carried out on 30 mandibular first molars using the ProTaper Universal System. Teeth were divided into two experimental groups (n=15): Group 1: sonic irrigation and Group 2: vacuum irrigation protocol. Subsequently, the mesial roots were sectioned and observed by stereomicroscopy and scanning electron microscopy. Three independent examiners evaluated images of the apical thirds according to the following scores: 1= small presence of debris,

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Beljic-Ivanovic, Katarina, and Nevenka Teodorovic. "Morphological characteristics of mesiobuccal root canals of the first maxillary molars." Srpski arhiv za celokupno lekarstvo 138, no. 7-8 (2010): 414–19. http://dx.doi.org/10.2298/sarh1008414b.

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Introduction. The first maxillary molar is a tooth with three roots, and mesiobuccal one is with the most complex canal morphology. Factors influencing variations of its morphology are numerous, and may significantly complicate endodontic treatment. Objective. The objective was to investigate the number, configuration and curvature orientation of the mesiobuccal root canals in the maxillary first molars. Methods. The study was conducted on 200 mesiobuccal (MB) roots of extracted first molars in human subjects using radiography. In each canal Flexofile was introduced until reaching the apical f

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Simsek, Neslihan, Fuat Ahmetoglu, Ali Keles, Elcin Tekin Bulut, and Kursat Er. "3D Analysis of D-RaCe and Self-Adjusting File in Removing Filling Materials from Curved Root Canals Instrumented and Filled with Different Techniques." Scientific World Journal 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/836513.

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The aim of this study was to compare the efficacy of D-RaCe files and a self-adjusting file (SAF) system in removing filling material from curved root canals instrumented and filled with different techniques by using microcomputed tomography (micro-CT). The mesial roots of 20 extracted mandibular first molars were used. Root canals (mesiobuccal and mesiolingual) were instrumented with SAF or Revo-S. The canals were then filled with gutta-percha and AH Plus sealer using cold lateral compaction or thermoplasticized injectable techniques. The root fillings were first removed with D-RaCe (Step 1),

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TEPEL, J., E. SCHÄFER, and W. HOPPE. "Root canal instruments for manual use: cutting efficiency and instrumentation of curved canals." International Endodontic Journal 28, no. 2 (1995): 68–76. http://dx.doi.org/10.1111/j.1365-2591.1995.tb00161.x.

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Miró, Gabriela Behne, Flávia Sens Fagundes Tomazinho, Edson Pelisser, et al. "Comparison of Canal Transportation and Centering Ability of ProGlider and WaveOne Gold Glider in Curved Canals." European Journal of Dentistry 14, no. 04 (2020): 639–43. http://dx.doi.org/10.1055/s-0040-1715780.

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Abstract Objectives The aim of this study was to compare the volume variation and maintenance of the root canal position when using the ProGlider 16.02 (PG) and the WaveOne Gold Glider 15.02 (WOGG) file systems for glide path preparation. Materials and Methods Twenty-four moderately curved mesiobuccal canals of maxil-lary first molars were selected and randomly divided into two groups: PG and WOGG. The selected teeth were scanned using microtomography before and after root canal preparation to assess centralization and linear transport at 1, 3, 5, and 7 mm from the apical foramen. Statistical

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Tonetto, Mateus R., EM Maia Filho, RM dos Reis Santos, et al. "Shaping Ability of ProTaper Next, WaveOne, and Reciproc in Simulated Root Canals." Journal of Contemporary Dental Practice 17, no. 11 (2016): 902–6. http://dx.doi.org/10.5005/jp-journals-10024-1951.

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ABSTRACT Introduction The study aimed to compare the shaping and preservation of the original curvature of simulated curved root canals using the following instruments: Reciproc (Rcp), WaveOne (Wo), and the ProTaper Next system (Ptn). Materials and methods A total of 45 resin blocks with simulated curved root canals were divided into three groups (n = 15), prepared using the Rcp (R25), Wo (25/0.8), and Ptn (X2) instruments. Standardized photographs were taken before and after canal instrumentation. After the superimposition of the images, the amount of resin removed from the curvature's inner

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Southard, Denny W., Robert J. Oswald, and Eugene Natkin. "Instrumentation of curved molar root canals with the roane technique." Journal of Endodontics 13, no. 10 (1987): 479–89. http://dx.doi.org/10.1016/s0099-2399(87)80015-8.

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Kielt, Laurence W., and Steve Montgomery. "The effect of endosonic instrumentation in simulated curved root canals." Journal of Endodontics 13, no. 5 (1987): 215–19. http://dx.doi.org/10.1016/s0099-2399(87)80093-6.

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Zmener, Osvaldo, Carlos Spielberg, and Jorge Olmos. "Effectiveness of two different methods for preparing curved root canals." Dental Traumatology 10, no. 5 (1994): 215–19. http://dx.doi.org/10.1111/j.1600-9657.1994.tb00072.x.

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Zmener, O., and L. Balbachan. "Effectiveness of nickel-titanium files for preparing curved root canals." Dental Traumatology 11, no. 3 (1995): 121–23. http://dx.doi.org/10.1111/j.1600-9657.1995.tb00472.x.

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Yeung, William, Denise Pontes Raldi, Rodrigo Sanches Cunha, and Isabel Mello. "Assessment of smear layer removal protocols in curved root canals." Australian Endodontic Journal 40, no. 2 (2013): 66–71. http://dx.doi.org/10.1111/aej.12038.

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Swimberghe, Rosalie C. D., Ruth Buyse, Maarten A. Meire, and Roeland J. G. De Moor. "Efficacy of different irrigation technique in simulated curved root canals." Lasers in Medical Science 36, no. 6 (2021): 1317–22. http://dx.doi.org/10.1007/s10103-021-03263-8.

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