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https://www.readbyqxmd.com/read/28621279/comparative-evaluation-of-stress-developed-on-rotary-retreatment-instruments-during-retrieval-of-gutta-percha
#1
Dhanasekaran Sihivahanan, T Vinay Kumar Reddy, Anchu Rachel Thomas, Natarajan Senthilnathan, Murali Sivakumar, Sushmita Shivanna
AIM: The aim of the study is to compare the maximum stress distribution on the rotary retreatment instruments within the root canal at cervical, middle, and the apical one-third during retreatment of gutta-percha. MATERIALS AND METHODS: A human mandibular premolar was scanned, and three-dimensional geometry of the root was reconstructed using finite element analysis (FEA) software package (ANSYS). The basic model was kept unchanged; tooth models were created using the same dimensions and divided into two groups as follows: Group I: ProTaper Universal retreatment system and group II: Mtwo rotary retreatment system...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28621275/measure-and-compare-the-degree-of-root-canal-transportation-and-canal-centering-ability-of-twisted-protaper-and-conventional-stainless-steel-k-files-using-spiral-computed-tomography-an-in-vitro-study
#2
F Rejula, R Christalin, Waseem Ahmed, Shiji Dinakaran, Anupama S Gopinathan, Anulekh Babu
AIM: The aim of this study was to compare canal transportation and centering ability of Twisted files (TF) and ProTaper (PT) files with conventional stainless steel (SS) K files. MATERIALS AND METHODS: Thirty mandibular premolar teeth with root curvature of 25 to 35° were selected. The samples were randomly divided into three groups of 10 each according to the type of files used for instrumentation. Group I was instrumented using TF, group II with PT files according to the manufacturer's recommendations, and group III with samples prepared with pre-curved SS K files using a step-back technique...
June 1, 2017: Journal of Contemporary Dental Practice
https://www.readbyqxmd.com/read/28620636/a-scanning-electron-microscopic-evaluation-of-the-effectiveness-of-etidronic-acid-smearclear-and-mtad-in-removing-the-intracanal-smear-layer
#3
Hemant Kumar Yadav, Rakesh Kumar Yadav, Anil Chandra, Aseem Prakash Tikku
STATEMENT OF THE PROBLEM: Root canal therapy should not simply be the extirpation of the pulp and widening of the canal. But one should also focus on how to completely remove the loosely-attached smear layer because it has adverse effects on the final outcome of the treatment. PURPOSE: This study compared the efficacy of Etidronic acid, SmearClear and MTAD to remove the smear layer created during instrumentation in different regions of the root canal. MATERIALS AND METHOD: Fifty single-rooted mandibular premolars were decoronated from the cementoenamel junction and instrumented using the ProTaper universal rotary file system along with copious irrigation by 1...
June 2017: Journal of Dentistry
https://www.readbyqxmd.com/read/28611329/comparative-evaluation-of-shaping-ability-of-v-taper-2h-protaper-next-and-hyflex-cm-in-curved-canals-using-cone-beam-computed-tomography-an-in-vitro-study
#4
Pratima Ramakrishna Shenoi, Disha Anand Luniya, Gautam Pyarelal Badole, Chetana Sachin Makade, Rajesh Kubde, Rajiv Tarachand Khode
AIM: The aim of this study was to compare the canal transportation and canal centering ability in the preparation of curved root canals after instrumentation with V-Taper 2H, ProTaper Next (PN), and Hyflex CM files using cone-beam computed tomography (CBCT). MATERIALS AND METHODS: Thirty mesiobuccal canals of mandibular molars with an angle of curvature ranging from 20 to 40 were divided according to the instrument used in canal preparation into three groups of ten samples each: V-Taper 2H (Group 1), PN (Group 2), and Hyflex CM (Group 3)...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28611328/volumetric-analysis-of-root-filling-with-cold-lateral-compaction-obtura-ii-thermafil-and-calamus-using-spiral-computerized-tomography-an-in-vitro-study
#5
Divya Jindal, Medhavi Sharma, Deepak Raisingani, Anupama Swarnkar, Mridu Pant, Rachit Mathur
AIM: The aim of the present study is volumetric analysis of root canal filling with cold lateral compaction, Obtura II, Thermafil, and Calamus using spiral computerized tomography (SCT). MATERIALS AND METHODS: Root canals of eighty mandibular premolars were instrumented using rotary ProTaper, and the volume of the canal space was measured using spiral computerized tomography (SCT). The teeth were divided into four groups of twenty teeth each, and root canals filled by lateral compaction technique, Thermafil carriers, Obtura II, and Calamus techniques, respectively...
March 2017: Indian Journal of Dental Research: Official Publication of Indian Society for Dental Research
https://www.readbyqxmd.com/read/28608053/apical-extrusion-of-debris-during-the-preparation-of-oval-root-canals-a-comparative-study-between-a-full-sequence-saf-system-and-a-rotary-file-system-supplemented-by-xp-endo-finisher-file
#6
Anda Kfir, Rotem Moza-Levi, Moran Herteanu, Amir Weissman, Ronald Wigler
OBJECTIVES: The purpose of this study was to assess the amount of apically extruded debris during the preparation of oval canals with either a rotary file system supplemented by the XP-endo Finisher file or a full-sequence self-adjusting file (SAF) system. MATERIALS AND METHODS: Sixty mandibular incisors were randomly assigned to two groups: group A: stage 1-glide path preparation with Pre-SAF instruments. Stage 2-cleaning and shaping with SAF. Group B: stage 1-glide path preparation with ProGlider file...
June 12, 2017: Clinical Oral Investigations
https://www.readbyqxmd.com/read/28606667/a-comparative-study-of-protaper-universal-and-protaper-next-used-by-undergraduate-students-to-prepare-root-canals
#7
Amin A H Alemam, Paul M H Dummer, Damian J J Farnell
INTRODUCTION: The purpose of this study was to determine whether final-year undergraduate dental students achieved better shaping outcomes using the new ProTaper Next (PTN; Dentsply Sirona, Ballaigues, Switzerland) system to prepare root canals for the first time compared with the existing ProTaper Universal (PTU, Dentsply Sirona) system on which they had trained. A secondary aim was to explore the attitudes and preferences of the students toward both systems. METHODS: Forty students prepared 1 simulated S-shaped canal using PTN and another with PTU...
June 9, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28577367/occurence-of-dentinal-defects-after-root-canal-preparation-with-r-phase-m-wire-and-gold-wire-instruments-a-micro-ct-analysis
#8
Marcely Cassimiro, Kaline Romeiro, Luciana Gominho, Andressa de Almeida, Larissa Costa, Diana Albuquerque
BACKGROUND: This study aims to evaluate the frequency of dentinal defects after root canal preparation with the ProTaper NEXT, K3XF and WaveOne GOLD systems using microcomputed tomography. METHODS: Sixty permanent mandibular incisors with a single canal were selected. Inspection of the teeth was performed under a stereomicroscope (15x) to observe the presence of pre-existing cracks and fractures lines. Samples were divided into three experimental groups (n = 20): ProTaper NEXT (PTN), K3XF (K3XF) and WaveOne GOLD (WOG)...
June 2, 2017: BMC Oral Health
https://www.readbyqxmd.com/read/28566670/micro-computed-tomography-evaluation-of-the-self-adjusting-file-and-protaper-universal-system-on-curved-mandibular-molars
#9
Burcu Serefoglu, Beyser Piskin
The aim of this investigation was to compare the cleaning and shaping efficiency of Self-adjusting file and Protaper, and to assess the correlation between root canal curvature and working time in mandibular molars using micro-computed tomography. Twenty extracted mandibular molars instrumented with Protaper and Self-adjusting file and the total working time was measured in mesial canals. The changes in canal volume, surface area and structure model index, transportation, uninstrumented area and the correlation between working-time and the curvature were analyzed...
May 30, 2017: Dental Materials Journal
https://www.readbyqxmd.com/read/28512488/in-vitro-microleakage-of-mineral-trioxide-aggregate-calcium-enriched-mixture-cement-and-biodentine-intra-orifice-barriers
#10
Fatemeh Ramezanali, Sasan Aryanezhad, Fatemeh Mohammadian, Fatemeh Dibaji, Mohammad Javad Kharazifard
INTRODUCTION: This in vitro study compared the coronal microleakage of mineral trioxide aggregate (MTA), calcium-enriched mixture (CEM) cement and Biodentine as intra-orifice barriers. METHODS AND MATERIALS: The study was conducted on 76 extracted single-canal human teeth. Their root canals were prepared using ProTaper rotary files and filled with gutta percha and AH-26 sealer using lateral condensation technique. Coronal 3 mm of the gutta percha was removed from the root canals and replaced randomly with MTA, CEM cement or Biodentine in the three experimental groups (n=22)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28476466/effect-of-protaper-gold-self-adjusting-file-and-xp-endo-shaper-instruments-on-dentinal-microcrack-formation-a-micro-computed-tomographic-study
#11
H Melike Bayram, Emre Bayram, Mert Ocak, Ahmet Demirhan Uygun, Hakan Hamdi Celik
INTRODUCTION: The aim of the present study was to evaluate the frequency of dentinal microcracks observed after root canal preparation with ProTaper Universal (PTU; Dentsply Tulsa Dental Specialties, Tulsa, OK), ProTaper Gold (PTG; Dentsply Tulsa Dental Specialties), Self-Adjusting File (SAF; ReDent Nova, Ra'anana, Israel), and XP-endo Shaper (XP; FKG Dentaire, La Chaux-de-Fonds, Switzerland) instruments using micro-computed tomographic (CT) analysis. METHODS: Forty extracted human mandibular premolars having single-canal and straight root were randomly assigned to 4 experimental groups (n = 10) according to the different nickel-titanium systems used for root canal preparation: PTU, PTG, SAF, and XP...
May 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28476464/environmental-temperature-drastically-affects-flexural-fatigue-resistance-of-nickel-titanium-rotary-files
#12
Nicola Maria Grande, Gianluca Plotino, Enrico Silla, Eugenio Pedullà, Gustavo DeDeus, Gianluca Gambarini, Francesco Somma
INTRODUCTION: The aim of the present study was to analyze how a low environmental temperature can affect the fatigue life of instruments made by different types of heat-treated nickel-titanium alloys. METHODS: The flexural cyclic fatigue of 40 new specimens for each of the following systems was tested for cyclic fatigue resistance: ProTaper Universal F2 (Dentsply Maillefer, Ballaigues, Switzerland), ProTaper Gold F2 (Dentsply Tulsa Dental Specialties, Tulsa, OK), Twisted Files SM2 (SybronEndo, Orange, CA), Mtwo #25...
May 2, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28475094/adaptation-of-gutta-percha-to-oval-canals-a-cone-beam-computed-tomographic-analysis
#13
Rafaela Andrade de Vasconcelos, Carlos Henrique Ribeiro Camargo, Bruno Neves Cavalcanti, Luiz Roberto Coutinho Manhães-Jr, Simone Helena Ferreira Gonçalves
This study evaluated the influence of different instrumentation techniques on the adaptation of gutta percha cones in oval-shaped root canals. A total of 90 human single-rooted teeth were divided into groups according to the instrumentation technique that was used: group M, manual; group OM, hybrid: oscillatory plus manual; group PT, rotary (ProTaper Universal); group OPT, hybrid: oscillatory plus rotary (ProTaper Universal); group MT, rotary (Mtwo); and group OMT, hybrid: oscillatory plus rotary (Mtwo). After a single gutta percha cone was adapted to the canal, cone beam computed tomography was utilized to perform assessments at areas of greater contact of gutta percha to root canal walls...
May 2017: General Dentistry
https://www.readbyqxmd.com/read/28469822/comparison-of-the-shaping-characteristics-of-neolix-and-protaper-universal-systems-in-preparation-of-severely-curved-simulated-canals
#14
Maryam Forghani, Maryam Hezarjaribi, Hamidreza Teimouri
BACKGROUND: The aim of this in vitro study was to compare the shaping characteristics of two types of nickel-titanium endodontic file systems with regard to the following parameters: Canal straightening, Canal deviation and Instrumentation time. MATERIAL AND METHODS: Fifty severely curved canals simulated in resin blocks were prepared to an apical size 25 using Protaper Universal orNeolix systems (n=25 canals/group). The angle of canal curvature was determined before and after instrumentation...
April 2017: Journal of Clinical and Experimental Dentistry
https://www.readbyqxmd.com/read/28454634/vibrations-generated-by-several-nickel-titanium-endodontic-file-systems-during-canal-shaping-in%C3%A2-an-ex%C3%A2-vivo-model
#15
Dong-Min Choi, Jin-Woo Kim, Se-Hee Park, Kyung-Mo Cho, Sang Won Kwak, Hyeon-Cheol Kim
INTRODUCTION: This study aimed to compare the vibration generated by several nickel-titanium (NiTi) file systems and transmitted to teeth under 2 different motions (continuous rotation motion and reciprocating motion). METHODS: Sixty J-shaped resin blocks (Endo Training Bloc-J; Dentsply Maillefer, Ballaigues, Switzerland) were trimmed to a root-shaped form and divided into 2 groups according to the types of electric motors: WaveOne motor (WOM, Dentsply Maillefer) and X-Smart Plus motor (XSM, Dentsply Maillefer)...
April 25, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28430299/effect-of-retreatment-instruments-on-microcrack-formation-a-microcomputed-tomography-study
#16
Mustafa M Koçak, Neslihan Y Çırakoğlu, Sibel Koçak, Baran C Sağlam, Ersan Çiçek, Sevinç A Türker, Emre Bodrumlu
INTRODUCTION: The purpose of this study was to compare the occurrence of microcracks in teeth prepared with different retreatment systems using microcomputed tomography (micro-CT). METHODS: Forty-two freshly extracted mandibular premolar teeth were used. The root canals were instrumented with stainless steel K-files to an apical size of 35/.02 using the balanced-force technique and were obturated using the passive compaction technique. The specimens were divided into 3 experimental groups according to retreatment system used (n = 14): ProTaper Universal retreatment (PTUR), Mtwo retreatment (MTR), or D-RaCe retreatment (D-RC) systems...
April 4, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28416307/the-efficacy-of-the-waveone-reciprocating-file-system-versus-the-protaper-retreatment-system-in-endodontic-retreatment-of-two-different-obturating-techniques
#17
Ben Jorgensen, Anne Williamson, Rene Chu, Fang Qian
INTRODUCTION: This ex vivo study aimed to evaluate the efficacy of retreating GuttaCore (Dentsply Tulsa Dental Specialties, Tulsa, OK) and warm vertically condensed gutta-percha in moderately curved canals with 2 different systems: ProTaper Universal Retreatment (Dentsply Tulsa Dental) and WaveOne (Dentsply Tulsa Dental). METHODS: Eighty mesial roots of mandibular molars were used in this study. The mesiobuccal canals in each sample were prepared to length with the WaveOne Primary file (Dentsply Tulsa Dental)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28416304/micro-computed-tomographic-analysis-of-apical-microcracks-before-and-after-root-canal-preparation-by-hand-rotary-and-reciprocating-instruments-at-different-working-lengths
#18
Bruna Paloma de Oliveira, Andréa Cruz Câmara, Daniel Amancio Duarte, Richard John Heck, Antonio Celso Dantas Antonino, Carlos Menezes Aguiar
INTRODUCTION: This study aimed to compare apical microcrack formation after root canal shaping by hand, rotary, and reciprocating files at different working lengths using micro-computed tomographic analysis. METHODS: Sixty mandibular incisors were randomly divided into 6 experimental groups (n = 10) according to the systems and working lengths used for the root canal preparation: ProTaper Universal for Hand Use (Dentsply Maillefer, Ballaigues, Switzerland), HyFlex CM (Coltene-Whaledent, Allstetten, Switzerland), and Reciproc (VDW, Munich, Germany) files working at the apical foramen (AF) and 1 mm short of the AF (AF - 1 mm)...
April 14, 2017: Journal of Endodontics
https://www.readbyqxmd.com/read/28413595/effect-of-retreatment-on-the-push-out-bond-strength-of-mta-based-and-epoxy-resin-based-endodontic-sealers
#19
Hamidreza Yavari, Shahriar Shahi, Saeedeh Galledar, Mohammad Samiei, Maryam Janani
Background. Further studies on the adhesion properties of MTA-based materials seem necessary due to their growing use in endodontic treatment. This research aimed to assess the effect of retreatment on the bond strength of MTA-based (MTA Fillapex) and epoxy resin-based (AH Plus) sealers. Methods. ProTaper rotary files were applied to prepare the root canals of 80 human mandibular premolars. Then, the roots were randomly divided intotwo groups of A (n=40) and B (n=40), which were obturated with gutta-percha and MTA Filla-pex and AH Plus sealer, respectively...
2017: Journal of Dental Research, Dental Clinics, Dental Prospects
https://www.readbyqxmd.com/read/28387992/influence-of-post-space-preparation-on-the-apical-leakage-of-calamus-single-cone-and-cold-lateral-condensation-obturation-techniques-a-computerized-fluid-filtration-study
#20
Zeynep Özkurt-Kayahan, Güher Barut, Zuhal Ulusoy, Hasan Oruçoğlu, Mehmet Baybora Kayahan, Ender Kazazoğlu, Faruk Haznedaroğlu
PURPOSE: Apical microleakage between the root canal and periapical tissues is considered a common cause of endodontic failure. The aim of this study was to evaluate the apical microleakage of various obturation techniques after immediate post space preparations with different drills. MATERIALS AND METHODS: One hundred twenty human single-rooted teeth were selected for this study. The coronal portions were removed to achieve a uniform length of 15 mm. All root canals were instrumented with ProTaper Next rotary files using crown-down technique...
April 7, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
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