The Experts below are selected from a list of 8649 Experts worldwide ranked by ideXlab platform
Koukichi Matsumoto - One of the best experts on this subject based on the ideXlab platform.
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An assessment following Root Canal Preparation by Er,Cr:YSGG laser irradiation in straight and curved Roots, in vitro
Lasers in Medical Science, 2006Co-Authors: K. M. Rownak Jahan, Jun-ichiro Kinoshita, Mozammal Hossain, Yukio Nakamura, Yamada Yoshishige, Koukichi MatsumotoAbstract:In the present study, the effectiveness of Er,Cr:YSGG laser in straight and curved Root Canal Preparation was compared with that of the conventional Canal Preparation technique, in vitro. The degree of Root curvature of 40 Root Canals was determined, and then 20 Canals were prepared by an Er,Cr:YSGG laser of 2 W by using the crown-down technique, while the other 20 Canals were shaped by K-file (control). The achievement degree of Root Canal Preparation and debris score was investigated morphologically. The results indicated that straight Root Canals could be successfully prepared by Er,Cr:YSGG laser irradiation; a significant decrease of smear layer or debris was also recognized ( P
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Efficacy of Root Canal Preparation by Er,Cr:YSGG Laser Irradiation with Crown-Down Technique in Vitro
Photomedicine and laser surgery, 2005Co-Authors: Mir Nowazesh Ali, Emi Matsuoka, Jun-ichiro Kinoshita, Mozammal Hossain, Yukio Nakamura, Koukichi MatsumotoAbstract:Objective: The purpose of this study was to compare the efficacy of Er,Cr:YSGG laser in Root Canal Preparation and its effectiveness in removing debris and smear layer with the efficacy of the conv...
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Morphological study on the capability of Er:YAG laser irradiation for Root Canal Preparation.
Journal of clinical laser medicine & surgery, 2000Co-Authors: Emi Matsuoka, Kazuo Yonaga, Jun-ichiro Kinoshita, Yuichi Kimura, Koukichi MatsumotoAbstract:Objective: The purpose of this study was to evaluate morphologically the capability of Er:YAG laser irradiation for Root Canal Preparation in vitro. Background Data: There have been no reports on Root Canal Preparation using Er:YAG laser irradiation. Methods: Forty extracted human teeth were divided randomly into two groups of 20. Laser irradiation was performed using three different sizes of fiber tips at the two different parameters (G 1, 2 Hz and 136-184 mJ/pulse; G 2, 2 Hz and 170-230 mJ/pulse). After laser irradiation, the teeth were bisected longitudinally and observed by stereoscopy and field emission-scanning electron microscopy (FE-SEM). The time required for Preparation in each group was recorded and the achievement degree of Root Canal Preparation was scored according to our criteria. Statistical analysis of the times was performed using one-way analysis of variance (ANOVA). A value of p < 0.01 was considered significant. Results: Root Canals were prepared using laser irradiation at 50% of teet...
P M H Dummer - One of the best experts on this subject based on the ideXlab platform.
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comparison of the effect of Root Canal Preparation by using waveone and protaper on postoperative pain a randomized clinical trial
Journal of Endodontics, 2015Co-Authors: Mohammad Hossein Nekoofar, Mohammad S Sheykhrezae, Naghmeh Meraji, Azad Jamee, Armin Shirvani, Javid Jamee, P M H DummerAbstract:Abstract Introduction WaveOne is a single-file reciprocating instrumentation system with the benefits of M-Wire alloy that has increased flexibility and improved resistance to cyclic fatigue over the conventional alloy. Root Canal Preparation techniques may cause postoperative pain. The goal of the present study was to compare the intensity and duration of postoperative pain when using WaveOne or ProTaper Universal systems for instrumentation of Root Canals. Methods Forty-two patients who fulfilled specific inclusion criteria were assigned to 2 groups according to the Root Canal instrumentation technique used, WaveOne or ProTaper Universal. Root Canal treatment was carried out in 2 appointments, and the severity of postoperative pain was assessed by numerical rating scale (NRS) score after each session until complete pain relief was achieved. Analgesic consumption, duration of pain, and Root Canal Preparation time were also recorded. Results The mean NRS score and duration of pain after both appointments were significantly higher in the WaveOne group ( P P P Conclusions Postoperative pain was significantly lower in patients undergoing Canal instrumentation with ProTaper Universal rotary instruments compared with the WaveOne reciprocating single-file technique.
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procedural errors during Root Canal Preparation using rotary niti instruments detected by periapical radiography and cone beam computed tomography
Brazilian Dental Journal, 2010Co-Authors: Ana Helena Goncalves De Alencar, Jesus Djalma Pécora, P M H Dummer, Henrique Cesar Marcal Oliveira, Carlos EstrelaAbstract:This study detected procedural errors created by rotary nickel-titanium (NiTi) instruments during Root Canal Preparation by two imaging methods. Forty extracted human maxillary and mandibular molars were divided randomly into two groups and treated by two endodontists (n=10) and two undergraduate dental students (n=10). The ProTaper UniversalTM Rotary System was used to shape the Canals and then they were filled using AH PlusTM sealer and gutta-percha. Periapical radiographs (PR) and cone beam computed tomography (CBCT) images were obtained and two examiners, who evaluated them to verify the occurrence of procedural errors (fractured instruments, perforations, and Canal transportation). The Chi-square test at 0.05 level of significance was used for statistical analyses. There were no significant differences (p>0.05) between the imaging methods. In the analysis of procedural errors, there was no significant difference (p>0.05) between the groups of operators (endodontists vs. students) nor between tooth groups (maxillary molars vs. mandibular molars). In view of the low incidence of procedural errors during Root Canal Preparation performed by students the introduction of rotary NiTi instruments has potential in undergraduate teaching. PR and CBCT permitted the detection of procedural errors, but the CBCT images offer more recourse for diagnosis.
Mohammad Hossein Nekoofar - One of the best experts on this subject based on the ideXlab platform.
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comparison of the effect of Root Canal Preparation by using waveone and protaper on postoperative pain a randomized clinical trial
Journal of Endodontics, 2015Co-Authors: Mohammad Hossein Nekoofar, Mohammad S Sheykhrezae, Naghmeh Meraji, Azad Jamee, Armin Shirvani, Javid Jamee, P M H DummerAbstract:Abstract Introduction WaveOne is a single-file reciprocating instrumentation system with the benefits of M-Wire alloy that has increased flexibility and improved resistance to cyclic fatigue over the conventional alloy. Root Canal Preparation techniques may cause postoperative pain. The goal of the present study was to compare the intensity and duration of postoperative pain when using WaveOne or ProTaper Universal systems for instrumentation of Root Canals. Methods Forty-two patients who fulfilled specific inclusion criteria were assigned to 2 groups according to the Root Canal instrumentation technique used, WaveOne or ProTaper Universal. Root Canal treatment was carried out in 2 appointments, and the severity of postoperative pain was assessed by numerical rating scale (NRS) score after each session until complete pain relief was achieved. Analgesic consumption, duration of pain, and Root Canal Preparation time were also recorded. Results The mean NRS score and duration of pain after both appointments were significantly higher in the WaveOne group ( P P P Conclusions Postoperative pain was significantly lower in patients undergoing Canal instrumentation with ProTaper Universal rotary instruments compared with the WaveOne reciprocating single-file technique.
Mário Tanomaru-filho - One of the best experts on this subject based on the ideXlab platform.
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Shaping ability of rotary or reciprocating systems for oval Root Canal Preparation: a micro-computed tomography study.
Clinical oral investigations, 2018Co-Authors: Camila Galletti Espir, Camila Almeida Nascimento-mendes, Juliane Maria Guerreiro-tanomaru, Bruno Cavalini Cavenago, Marco Antonio Hungaro Duarte, Mário Tanomaru-filhoAbstract:Objectives To evaluate the shaping ability and cleaning after oval Root Canal Preparation using one or more instruments in reciprocating or rotary motion.
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Counterclockwise or clockwise reciprocating motion for oval Root Canal Preparation: a micro-CT analysis.
International endodontic journal, 2017Co-Authors: Camila Galetti Espir, C. A. Nascimento-mendes, J. M. Guerreiro-tanomaru, Laila Gonzales Freire, Giulio Gavini, Mário Tanomaru-filhoAbstract:Aim To evaluate oval Root Canal Preparation using one or two instruments in counterclockwise or clockwise reciprocating motion. Methodology The radiographic diameter of mandibular human incisors was evaluated, and oval Canals were selected (2 ≤ Diameter Ratio ≤ 4). Fifty-seven teeth were assigned to Root Canal Preparation (n = 19): Reciproc 40 (R40) in a counterclockwise reciprocating motion; Mtwo size 40, .06 taper (M 40.06) in a clockwise reciprocating motion or Mtwo size 20, .06 taper and size 40, .06 taper (M 20/40.06) in a clockwise reciprocating motion. Mtwo instruments were coupled to an ENDO DUAL motor, turning 150° clockwise and 30° counterclockwise. Scanning was performed before and after Root Canal Preparation using a SkyScan 1176 micro-computed tomography. Volume, percentage of debris and percentage of uninstrumented surface were analysed in the entire Root Canal and in each third of the Canal. Data were compared using anova and Tukey's tests or Kruskal–Wallis and Dunn tests. Results The Reciproc and Mtwo systems using different kinematics were associated with a similar increase in Root Canal volume. Additionally, both system had similar percentage of uninstrumented surface (P > 0.05). Mtwo size 20, .06 taper and size 40, .06 taper was associated with significantly lower debris (P
Marco Aurelio Versiani - One of the best experts on this subject based on the ideXlab platform.
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Root Canal Preparation Does Not Induce Dentinal Microcracks In Vivo.
Journal of endodontics, 2019Co-Authors: Angambakkam Rajasekaran Pradeepkumar, Marco Aurelio Versiani, Hagay Shemesh, Durvasulu Archana, Manoel Damião Sousa-neto, Graziela Bianchi Leoni, Yara Teresinha Corrêa Silva-sousa, Anil KishenAbstract:Abstract Introduction This in vivo study aimed to evaluate the development of dentinal microcracks after Root Canal Preparation of contralateral premolars with rotary or hand instruments using micro–computed tomographic technology. Methods Sixty contralateral intact maxillary and mandibular premolars in which extraction was indicated for orthodontic purposes were selected and distributed into positive (n = 6, teeth with induced Root microcracks) and negative (n = 6, intact teeth) control groups as well as 2 experimental groups (n = 24) according to the instrumentation protocol: ProTaper rotary (PTR) or ProTaper hand (PTH) systems (Dentsply Maillefer, Ballaigues, Switzerland). After Root Canal Preparation, teeth were extracted using an atraumatic technique and scanned at a resolution of 17.18 μm. A total of 43,361 cross-sectional images of the Roots were screened for the presence of dentinal microcracks. The results were expressed as the percentage and number of Root section images with microcracks for each group. Results All Roots in the positive control group showed microcracks at the apical third, whereas no cracks were observed in the specimens of the negative control group. In the PTR group, 17,114 cross-sectional images were analyzed, and no microcrack was observed. In the PTH group, dentinal microcracks were observed in 116 of 17,408 cross-sectional slices (0.66%) of only 1 specimen. These incomplete microcracks extended from the external Root surface into the inner Root dentin at the area of reduced dentin thickness. Conclusions Root Canal instrumentation with PTR and PTH instruments of contralateral maxillary and mandibular premolars did not result in the formation of dentinal microcracks in vivo.
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lack of causal relationship between dentinal microcracks and Root Canal Preparation with reciprocation systems
Journal of Endodontics, 2014Co-Authors: Gustavo Dedeus, Emmanuel Joao Nogueira Leal Silva, Juliana Marins, Erick Miranda Souza, Aline De Almeida Neves, Felipe Goncalves Elladonna, Haimon Diniz Lopes Alves, R T Lopes, Marco Aurelio VersianiAbstract:Introduction This study aimed to evaluate the frequency of dentinal microcracks observed after Root Canal Preparation with 2 reciprocating and a conventional full-sequence rotary system using micro–computed tomographic analysis.
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lack of causal relationship between dentinal microcracks and Root Canal Preparation with reciprocation systems
Journal of Endodontics, 2014Co-Authors: Gustavo Dedeus, Emmanuel Joao Nogueira Leal Silva, Juliana Marins, Erick Miranda Souza, Aline De Almeida Neves, Haimon Diniz Lopes Alves, R T Lopes, Felipe Goncalves Belladonna, Marco Aurelio VersianiAbstract:Abstract Introduction This study aimed to evaluate the frequency of dentinal microcracks observed after Root Canal Preparation with 2 reciprocating and a conventional full-sequence rotary system using micro–computed tomographic analysis. Methods Thirty mesial Roots of mandibular molars presenting a type II Vertucci Canal configuration were scanned at an isotropic resolution of 14.16 μm. The sample was randomly assigned to 3 experimental groups (n = 10) according to the system used for the Root Canal Preparation: group A—Reciproc (VDW, Munich, Germany), group B—WaveOne (Dentsply Maillefer, Baillagues, Switzerland), and group C—BioRaCe (FKG Dentaire, La-Chaux-de-Fonds, Switzerland). Second and third scans were taken after the Root Canals were prepared with instruments sizes 25 and 40, respectively. Then, pre- and postoperative cross-section images of the Roots (N = 65,340) were screened to identify the presence of dentinal defects. Results Dentinal microcracks were observed in 8.72% (n = 5697), 11.01% (n = 7197), and 7.91% (n = 5169) of the cross-sections from groups A (Reciproc), B (WaveOne), and C (BioRaCe), respectively. All dentinal defects identified in the postoperative cross-sections were also observed in the corresponding preoperative images. Conclusions No causal relationship between dentinal microcrack formation and Canal Preparation procedures with Reciproc, WaveOne, and BioRaCe systems was observed.
