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John J, Singh V P P, Karuveettil V, M R, Subramanian D, Haridas K. Comparison of crack formation induced by ultrasonic tips and burs during root-end preparation: a systematic review and meta-analysis. Evid Based Dent 2022:10.1038/s41432-022-0823-0. [PMID: 36434118 DOI: 10.1038/s41432-022-0823-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Accepted: 12/02/2021] [Indexed: 06/16/2023]
Abstract
Introduction The main objective of root canal treatment is to achieve apical seal. Crack formation during root-end preparation promotes bacterial penetration, thereby leading to failure. This systematic review aims to examine the literature and summarise studies that compare the crack formation induced by ultrasonic tips and burs during root-end preparation.Methods This systematic review and meta-analysis were reported and conducted according to the PRISMA guidelines. The online databases PubMed, Scopus, and Google Scholar were used for data search. In vitro and ex vivo studies conducted up to March 2021 in the English language were included in the review. The risk of bias in the present study was assessed using a customised tool. A random-effects model was used for meta-analysis, χ² values and I² values were used to assess statistical heterogeneity. Meta-analysis was performed using RevMan software Version 5.4.Results A total of 317 records were found from all of the databases and one article was added following hand-searching. Twelve articles were included in the study after the application of the eligibility criteria of which ten articles were included for the meta-analysis. Nine studies showed a medium risk of bias while three studies showed a high risk of bias. The analysis of the crack formation showed a statistically significant difference between the ultrasonic tip and the bur (P = 0.0002). The odds ratio was 2.72 (1.60, 4.65) with a confidence interval of 95% suggesting higher odds of crack formation in the ultrasonic group.Conclusion This review concludes that ultrasonic root-end preparation resulted in higher crack formation than burs.
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Affiliation(s)
- Jesseca John
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India.
| | - Prabath Singh V P
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Vineetha Karuveettil
- Department of Public Health Dentistry, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Remya M
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Deepthy Subramanian
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
| | - Kaushik Haridas
- Department of Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Vishwa Vidyapeetham, Kochi, Kerala, India
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Barakat RM, Almohareb RA, Alsayyar A, Almalki F, Alharbi H. Evaluation of Dentinal Microcracks following Diode Laser- and Ultrasonic-Activated Removal of Bioceramic Material during Root Canal Retreatment. SCANNING 2022; 2022:6319743. [PMID: 36570434 PMCID: PMC9705085 DOI: 10.1155/2022/6319743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 10/20/2022] [Accepted: 11/15/2022] [Indexed: 06/17/2023]
Abstract
This study is aimed at evaluating the use of microcomputed tomography (micro-CT) analysis and the dentinal microcrack formation following retreatment of bioceramic sealer employing adjunct laser-activated irrigation and ultrasonic-activated irrigation. Thirty sound human single-canal teeth (n = 30) obturated using the single-cone technique with bioceramic sealer were retreated using nickel-titanium (NiTi) rotary files. The sample was randomly divided into three equal groups: group 1, the control group, was not subjected to further treatment; group 2 underwent ultrasonic activation of irrigants; group 3 underwent active irrigation with a diode laser (980 nm wavelength). Using micro-CT, the teeth were scanned before and after retreatment protocols. Two calibrated experienced observers viewed the cross-sectional images and calculated the number of dentinal defects. The presence of any crack or craze line on the external root surface or internal canal wall was counted. Data were analyzed using Friedman's two-way analysis of variance and Fisher's exact test. Statistical significance was set at p < 0.05. A significant increase occurred in the number of cracks post retreatment protocols, specifically in the coronal and middle canal thirds, compared to pre- and postinstrumentation (p = 0.0001). However, ultrasonic- or laser-activated irrigation did not result in a significant increase in the number of cracks (p = 0.345). NiTi rotary root canal retreatment was associated with a significant increase in dentinal microcracks. However, employing ultrasonic- or laser-activated irrigation as adjunct retreatment techniques did not reveal a significant increase in dentinal microcracks within the roots.
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Affiliation(s)
- Reem M. Barakat
- Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Rahaf A. Almohareb
- Department of Clinical Dental Sciences, College of Dentistry, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Aljuharh Alsayyar
- Dental Intern, College of Dentistry, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Fayruz Almalki
- Dental Intern, College of Dentistry, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
| | - Hissah Alharbi
- Dental Intern, College of Dentistry, Princess Nourah Bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia
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Wagih M, Hassanien E, Nagy M. Sealing Ability and Adaptability of Nano Mineral Trioxide Aggregate as a Root-End Filling Material. Open Access Maced J Med Sci 2022. [DOI: 10.3889/oamjms.2022.10080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Aim: Comparison between Nano MTA & MTA as a root-end filling materials regarding adaptability and sealing ability.
Materials and Methods: Forty extracted human maxillary incisors with straight roots were used. After root canals preparation and obturation, the apical 3 mm of each root was resected perpendicular to the long axis of the tooth. Root end cavities were prepared to a depth of 3mm parallel to the long axis of the tooth. The teeth were randomly divided into two main equal groups of 20 samples each according to the root-end filling material used either MTA or Nano MTA. Ten samples from each group were sectioned longitudinally into two equal halves to measure the sealing ability and another ten samples from each group were sectioned transversally to obtain 1 mm thick section to measure the adaptability of both materials. All samples were photographed under the SEM at three different magnifications (×1000). The gap thickness between the root end filling material and the retro cavity dentine walls were measured at seven selected points at the material-dentine interface in micrometers (µm).
Results: Nano MTA and MTA showed no statistically significant difference in the gap thickness between dentin-material interface in both longitudinal and transverse sections. Regarding the sealing ability, the mean value in MTA was (3.27±0.77), while the mean in Nano-MTA was (3.15±0.71). Regarding the adaptability, the mean value in MTA was (2.46±0.60), while the mean in Nano-MTA was (2.05±0.712). Both materials showed good sealing ability and good adaptation to the dentinal wall.
Conclusion: Nano MTA revealed good sealing ability and adaptability comparable to MTA when used as a retrograde filling material.
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Corsentino G, Mazzitelli C, Mazzoni A, Ambu E, Perotto C, Franciosi G, Grandini S. Sealing ability of two root-end filling materials at different retro-preparation lengths. J Oral Sci 2022; 64:80-84. [PMID: 34980823 DOI: 10.2334/josnusd.21-0309] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
PURPOSE The aim of the present study was to evaluate the sealing performance, expressed as microleakage (ML), of two root-end filling materials when used at different retro-preparation lengths. METHODS Fifty single-rooted human teeth were collected for the study. The teeth were cut at the cement-enamel junction and endodontic treatment was performed. Each root was cut at 3 mm from the apex and then stored in wet condition. The teeth were divided into three groups according to the retro-preparation length: control group (no retro-preparation); group 1 (retro-preparation of 3 mm); group 2 (retro-preparation of 9 mm). The teeth were equally allocated to either Biodentine or Super EBA treatment group. The teeth were immersed in 3% methylene blue dye solution for 24 h. The samples were split longitudinally and the depth of dye penetration was examined through light microscopy. RESULTS No significant statistical differences were found at different retro-preparation lengths (P > 0.05). Differences were found between materials (P > 0.05). CONCLUSION Biodentine showed significantly lower ML when compared to Super-EBA and no statistical significative differences were observed when samples were retro-prepared at 3 mm or 9 mm.
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Affiliation(s)
- Giacomo Corsentino
- Department of Endodontics and Restorative Dentistry, University of Siena
| | - Claudia Mazzitelli
- Department of Biomedical and Neuromotor Sciences, University of Bologna-Alma Mater Studiorum
| | - Annalisa Mazzoni
- Department of Biomedical and Neuromotor Sciences, University of Bologna-Alma Mater Studiorum
| | - Emanuele Ambu
- Department of Endodontics and Restorative Dentistry, University of Siena
| | - Cristina Perotto
- Department of Endodontics and Restorative Dentistry, University of Siena
| | - Giovanni Franciosi
- Department of Endodontics and Restorative Dentistry, University of Siena
| | - Simone Grandini
- Department of Endodontics and Restorative Dentistry, University of Siena
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Bijari S, Saberi E, Dinarvand R. Scanning electron microscopic evaluation of the effect of different root-end resection methods in the crack formation in root canals filled with mineral trioxide aggregate or calcium-enriched mixture cement. Dent Res J (Isfahan) 2022. [DOI: 10.4103/1735-3327.363569] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
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Ling Z, Zheng Z, Zeng Y, Jiang L, Wu Y, Wu B, Yan W. Effect of Heat Softening versus Ultrasonic Removal of Root-End Gutta-Percha on the Quality of Root-End Preparation for Endodontic Microsurgery. SCANNING 2021; 2021:8320234. [PMID: 34405033 PMCID: PMC8355974 DOI: 10.1155/2021/8320234] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Revised: 06/15/2021] [Accepted: 07/09/2021] [Indexed: 05/05/2023]
Abstract
This study is aimed at comparing the efficacy of heat softening and ultrasonic removal of root-end gutta-percha during retrograde preparation for root apical microsurgery. Recently extracted single-rooted premolars (n = 40) were prepared with standardized endodontically treated and root-end resection and then randomly divided into four groups that received root-end cavity preparation using four different instruments: a diamond-coated ultrasonic tip (AS3D; SACTEON, Paris, France), AS3D with the modified plugger of cordless heat carrier (MSE; B&L Biotech, Bala Cynwyd, PA, USA), stainless steel ultrasonic tip (Jetip-2; B&L Biotech, Bala Cynwyd, PA, USA), or Jetip-2 with MSE. The time required for root-end preparation was recorded. The root apex samples were examined by scanning electron microscopy to assess root surface microcracks and marginal integrity. The remnants of gutta-percha on the cavity walls were evaluated using a stereomicroscope. Statistical analysis was performed using Student's t-test and Wilcoxon rank-sum test (P < 0.05). Usage of MSE with Jetip-2 significantly reduced preparation time from 99.8 ± 6.8 s to 32.4 ± 1.0 s (P = 0.009), the number of microcracks from 42 to 13 (P = 0.036), and the remnants of gutta-percha from 80% to 20% (P = 0.041). Similar results were observed for AS3D with MSE. The heat softening of MSE was effective in cleaning gutta-percha, thus greatly improving the efficiency of the root-end preparation, thereby producing a root-end cavity with fewer microcracks and better marginal integrity.
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Affiliation(s)
- Zhiting Ling
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Ziting Zheng
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Yuting Zeng
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Lifang Jiang
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Yuan Wu
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Buling Wu
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
| | - Wenjuan Yan
- Department of Conservative and Endodontic Dentistry, Nanfang Hospital, Southern Medical University, 1838 N Guangzhou Road, Guangzhou 510515, China
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Palma PJ, Marques JA, Casau M, Santos A, Caramelo F, Falacho RI, Santos JM. Evaluation of Root-End Preparation with Two Different Endodontic Microsurgery Ultrasonic Tips. Biomedicines 2020; 8:biomedicines8100383. [PMID: 32998221 PMCID: PMC7601836 DOI: 10.3390/biomedicines8100383] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/19/2020] [Accepted: 09/25/2020] [Indexed: 02/06/2023] Open
Abstract
The aim of this study is to compare root-end preparation performed with two different ultrasonic tips-CVDentus and NSK-and respective time requirements. After root-end resection, 32 teeth were randomly divided in two groups, according to the ultrasonic tip used for root-end preparation. Preparation time was recorded. Photomicrographs were taken to assess the following parameters: root surface microcracking, marginal integrity and presence of debris. One ultrasonic tip from each group was analyzed through scanning electron microscopy before and after root-end preparation. The significance level was set at α = 0.05. Incidence of microcracks in both groups was 12.5%. Solely intracanal microcracking was found, consistently positioned within the widest side of the remaining dentine. No statistically significant differences were verified between both experimental groups regarding marginal integrity (p = 0.102) and preparation time (p = 0.780), whereas statistical differences (p = 0.003) were found concerning the presence of debris (the minimum registered score was mostly verified in CVDentus group). NSK tips showed major morphological changes, with extensive surface wear and noticeable loss of particles, which was not verified on CVDentus tips. Our findings suggest significant differences regarding root-end preparation walls quality, with CVDentus tips showing better results. Concerning microcracking, as well as preparation time and marginal integrity, both ultrasonic tips showed similar results. Qualitative analysis exposed NSK tips major morphological changes and wear after use, which was not verified on CVDentus tips.
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Affiliation(s)
- Paulo J. Palma
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (J.A.M.); (J.M.S.)
- Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
- Correspondence: ; Tel.: +351-239-249-151
| | - Joana A. Marques
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (J.A.M.); (J.M.S.)
| | - Margarida Casau
- Dentistry Department, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (M.C.); (A.S.)
| | - André Santos
- Dentistry Department, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (M.C.); (A.S.)
| | - Francisco Caramelo
- Coimbra Institute for Clinical and Biomedical Research (iCBR), Laboratory of Biostatistics and Medical Informatics (LBIM), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal;
| | - Rui I. Falacho
- Institute of Oral Implantology and Prosthodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal;
| | - João Miguel Santos
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (J.A.M.); (J.M.S.)
- Center for Innovation and Research in Oral Sciences (CIROS), Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal
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Hegde MN, Honap MN, Narayanan S. Evaluation of surface integrity of root end cavities prepared using conventional and piezoelectric devices: A scanning electron microscopy study. Indian J Dent Res 2019; 30:772-776. [PMID: 31854372 DOI: 10.4103/ijdr.ijdr_237_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
Introduction An array of factors control the success of endodontic surgery. One of them is the technique used to prepare the root end cavities which is conventionally being done with burs. In past decades, ultrasonic instruments have been introduced for the same. Studies comparing these instruments on root surface integrity are scarce. Thus, an in-vitro Scanning Electron Microscopy study was designed to evaluate the surface integrity of root end cavities prepared using conventional and piezoelectric devices. Methodology Twelve single-rooted human intact mandibular premolar teeth were endodontically treated and included in the study. They were divided into two groups. In the first group, 3 mm root-end cavities were prepared using conventional retro preparation burs and in the second group, 3 mm root-end cavities were prepared using piezoelectric retro-tips. The specimens were coded for blind evaluation and analysed under scanning electron microscope at 100x, 500x and 1000x magnification for smear layer and debris. Gutmann's scoring criteria was followed to score the specimens. Statistical analysis was carried out using Shapiro Wilk test and the independent sample t-test was used to check mean differences between variables. Results It was noted that significant statistical differences existed in mean debris and smear layer scores (p< 0.001) between the two groups. In the piezoelectric group, significantly lower debris layer and smear layer was found, compared to the conventional bur group. Conclusion Root-end cavities prepared using piezo retrotips produced cleaner, well-centered and more conservative surface with minimal debris & smear layer, compared to root-end cavities prepared using conventional burs.
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Affiliation(s)
- Mithra N Hegde
- Department of Conservative Dentistry and Endodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India
| | - Manjiri Nagesh Honap
- Department of Conservative Dentistry and Endodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India
| | - Sreenath Narayanan
- Department of Conservative Dentistry and Endodontics, A B Shetty Memorial Institute of Dental Sciences, Mangalore, Karnataka, India
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Endal U, Shen Y, Ma J, Yang Y, Haapasalo M. Evaluation of Quality and Preparation Time of Retrograde Cavities in Root Canals Filled with GuttaCore and Cold Lateral Condensation Technique. J Endod 2018; 44:639-642. [DOI: 10.1016/j.joen.2017.11.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 11/29/2017] [Accepted: 11/30/2017] [Indexed: 11/29/2022]
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Fu M, Huang X, He W, Hou B. Effects of ultrasonic removal of fractured files from the middle third of root canals on dentinal cracks: a micro-computed tomography study. Int Endod J 2018; 51:1037-1046. [DOI: 10.1111/iej.12909] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 02/07/2018] [Indexed: 12/28/2022]
Affiliation(s)
- M. Fu
- Department of Endodontics; School of Stomatology; Capital Medical University; Beijing China
| | - X. Huang
- Department of General Dentistry; School of Stomatology; Capital Medical University; Beijing China
| | - W. He
- Department of Endodontics; School of Stomatology; Capital Medical University; Beijing China
| | - B. Hou
- Department of Endodontics; School of Stomatology; Capital Medical University; Beijing China
- Department of General Dentistry; School of Stomatology; Capital Medical University; Beijing China
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Bernardes RA, Húngaro Duarte MA, Vivan RR, Baldi JV, Vasconcelos BC, Bramante CM. Scanning electronic microscopy analysis of the apical surface after of root-end resection with different methods. SCANNING 2015; 37:126-130. [PMID: 25652816 DOI: 10.1002/sca.21188] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 12/22/2014] [Accepted: 12/29/2014] [Indexed: 06/04/2023]
Abstract
To compare the time dispensed and the surface characteristics when a root-end resection was performed with a surgical ultrasonic device (VarioSurg, NSK, Japan) or with a Zekrya bur. Forty distal roots of freshly extracted mandibular molars were selected and divided into four different groups: (G1) stainless steel insert with ultrasound; (G2) diamond insert with ultrasound; (G3) stainless steel and diamond inserts with ultrasound, and (G4) Zekrya burs. The time required for the root-end resection was timed and the surface characteristics were evaluated via scanning electronic microscopy. The median times for the root-end resections were: 115.9 s for G1, 249.8 s for G2, 112.7 s for G3, and 7.44 s for G4, the latter presented a smoother root-end surface. There was no statistically significant difference in the comparisons between G3 group and G4 group (Zekrya burs). The other groups where the root-end resections were with ultrasonic devices proportioned a prolonged time to resection with irregular surfaces.
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Affiliation(s)
- Ricardo Affonso Bernardes
- Department of Dentistry, Endodontics and Dentistry Material, Bauru Dental School, University of São Paulo, Bauru, São Paulo, Brazil; Brazilian Dental Association, Taguatinga, Federal District, Brazil
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Kwak SW, Moon YM, Yoo YJ, Baek SH, Lee W, Kim HC. Cutting efficiency of apical preparation using ultrasonic tips with microprojections: confocal laser scanning microscopy study. Restor Dent Endod 2014; 39:276-81. [PMID: 25383346 PMCID: PMC4223097 DOI: 10.5395/rde.2014.39.4.276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2014] [Accepted: 06/13/2014] [Indexed: 11/11/2022] Open
Abstract
Objectives The purpose of this study was to compare the cutting efficiency of a newly developed microprojection tip and a diamond-coated tip under two different engine powers. Materials and Methods The apical 3-mm of each root was resected, and root-end preparation was performed with upward and downward pressure using one of the ultrasonic tips, KIS-1D (Obtura Spartan) or JT-5B (B&L Biotech Ltd.). The ultrasonic engine was set to power-1 or -4. Forty teeth were randomly divided into four groups: K1 (KIS-1D / Power-1), J1 (JT-5B / Power-1), K4 (KIS-1D / Power-4), and J4 (JT-5B / Power-4). The total time required for root-end preparation was recorded. All teeth were resected and the apical parts were evaluated for the number and length of cracks using a confocal scanning micrscope. The size of the root-end cavity and the width of the remaining dentin were recorded. The data were statistically analyzed using two-way analysis of variance and a Mann-Whitney test. Results There was no significant difference in the time required between the instrument groups, but the power-4 groups showed reduced preparation time for both instrument groups (p < 0.05). The K4 and J4 groups with a power-4 showed a significantly higher crack formation and a longer crack irrespective of the instruments. There was no significant difference in the remaining dentin thickness or any of the parameters after preparation. Conclusions Ultrasonic tips with microprojections would be an option to substitute for the conventional ultrasonic tips with a diamond coating with the same clinical efficiency.
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Affiliation(s)
- Sang-Won Kwak
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
| | - Young-Mi Moon
- Department of Conservative Dentistry, School of Dentistry, Daejeon Hospital, WonKwang University, Daejeon, Korea
| | - Yeon-Jee Yoo
- Department of Conservative Dentistry, School of Dentistry, Seoul National University, Dental Research Institute, Seoul, Korea
| | - Seung-Ho Baek
- Department of Conservative Dentistry, School of Dentistry, Seoul National University, Dental Research Institute, Seoul, Korea
| | - WooCheol Lee
- Department of Conservative Dentistry, School of Dentistry, Seoul National University, Dental Research Institute, Seoul, Korea
| | - Hyeon-Cheol Kim
- Department of Conservative Dentistry, School of Dentistry, Pusan National University, Dental Research Institute, Yangsan, Korea
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Gunes B, Aydinbelge HA. Effects of ultrasonic root-end cavity preparation with different surgical-tips and at different power-settings on glucose-leakage of root-end filling material. J Conserv Dent 2014; 17:476-80. [PMID: 25298652 PMCID: PMC4174711 DOI: 10.4103/0972-0707.139846] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2013] [Revised: 07/04/2013] [Accepted: 07/16/2014] [Indexed: 11/28/2022] Open
Abstract
Aim: The aim of this in vitro study was to evaluate the effects of different ultrasonic surgical-tips and power-settings on micro-leakage of root-end filling material. Materials and Methods: The root canals were instrumented using rotary-files and were filled with tapered gutta-percha and root canal sealer using a single-cone technique. The apical 3 mm of each root was resected and the roots were divided into six experimental groups; negative and positive control groups. Root-end cavities were prepared with diamond-coated, zirconum-nitride-coated and stainless-steel ultrasonic retro-tips at half-power and high-power settings. The time required to prepare the root-end cavities for each group was recorded. Root-end cavities were filled with Super-EBA. Leakage values of all samples evaluated with glucose penetration method on 7, 14, 21 and 28th days. The results were statistically analyzed with Kruskal-Wallis and Hollander-Wolfe tests. Results: The mean time required to prepare retro cavities using diamond-coated surgical tip at high-power setting was significantly less than other groups (P < 0.01). There were no statistically significant differences in the glucose penetration between the groups at first and second weeks (P > 0.01). Diamond-coated surgical tip showed the least leakage at high-power setting at 3rd and 4th weeks (P < 0.01). Conclusions: Under the conditions of this study, cavity preparation time was the shortest and the leakage of the root-end filling was the least when diamond-coated retro-tip used at high-power setting.
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Affiliation(s)
- Betul Gunes
- Department of Endodontics, Faculty of Dentistry, University of Osmangazi, Eskişehir, Turkey
| | - Hale Ali Aydinbelge
- Department of Endodontics, Faculty of Dentistry, University of Selcuk, Selcuklu-Konya, Turkey
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Aydemir S, Cimilli H, Mumcu G, Chandler N, Kartal N. Crack Formation on Resected Root Surfaces Subjected to Conventional, Ultrasonic, and Laser Root-End Cavity Preparation. Photomed Laser Surg 2014; 32:351-5. [DOI: 10.1089/pho.2013.3696] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Seda Aydemir
- Department of Endodontics, Faculty of Dentistry, Kocaeli University, Kocaeli, Turkey
| | - Hale Cimilli
- Department of Restrorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkey
| | - Gonca Mumcu
- Faculty of Health Sciences, Marmara University, Istanbul, Turkey
| | - Nicholas Chandler
- Sir John Walsh Research Institute, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Nevin Kartal
- Department of Restrorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkey
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Abella F, de Ribot J, Doria G, Duran-Sindreu F, Roig M. Applications of Piezoelectric Surgery in Endodontic Surgery: A Literature Review. J Endod 2014; 40:325-32. [DOI: 10.1016/j.joen.2013.11.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2013] [Revised: 11/14/2013] [Accepted: 11/20/2013] [Indexed: 01/11/2023]
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16
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Liu Z, Zhang D, Li Q, Xu Q. Evaluation of Root-end Preparation with a New Ultrasonic Tip. J Endod 2013; 39:820-3. [DOI: 10.1016/j.joen.2013.03.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2012] [Revised: 02/23/2013] [Accepted: 03/03/2013] [Indexed: 11/28/2022]
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Aydemir S, Cimilli H, Yoruç ABH, Kartal N. Evaluation of two different root-end cavity preparation techniques: A scanning electron microscope study. Eur J Dent 2013; 7:186-190. [PMID: 24883024 PMCID: PMC4023193 DOI: 10.4103/1305-7456.110168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE In this study, we aimed to evaluate and compare the dentinal walls of root-end cavities for the presence of cracks after cavity preparation using US retrotips and Er: YAG laser. MATERIALS AND METHODS Fifty single-rooted teeth were prepared by Protaper NiTi rotary system and obturated by lateral condensation. Three milimeters of root-end was resected. Twenty teeth were prepared with US retrotip (Group 1), 20 teeth with Er: YAG laser (Group 2), and 10 teeth without retropreparation (control group). The root-end surfaces were examined under a scanning electron microscope (SEM). Then the cracks of the resected root surfaces were evaluated on microphotographs. RESULTS No statistically significant difference was detected between US Group and Laser Group for complete, incomplete, intradentinal, and total number of cracks (P = 0.47, P = 0.80, P = 0.69, P = 0.869, respectively). CONCLUSION Statistical analysis revealed no significant effect of retropreparation technique on the development of apical cracks (P > 0.05).
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Affiliation(s)
- Seda Aydemir
- Department of Endodontics, Faculty of Dentistry, Kocaeli University, Kocaeli, Turkiye
| | - Hale Cimilli
- Department of Restrorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkiye
| | - Afife Binnaz Hazar Yoruç
- Department of Metallurgical and Materials Engineering, Yildiz Technical University, Istanbul, Turkiye
| | - Nevin Kartal
- Department of Restrorative Dentistry, Faculty of Dentistry, Marmara University, Istanbul, Turkiye
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18
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Fabiani C, Franco V, Covello F, Brambilla E, Gagliani MM. Removal of surgical smear layer. J Endod 2011; 37:836-8. [PMID: 21787500 DOI: 10.1016/j.joen.2011.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2010] [Revised: 02/28/2011] [Accepted: 03/03/2011] [Indexed: 11/30/2022]
Abstract
INTRODUCTION During apicoectomy and retrograde cavity preparation, a smear layer, which contains microorganisms and necrotic pulpal tissues, is formed on the dentinal surfaces cut by the instruments. Bacteria can survive and proliferate inside or below the smear layer. The purpose of this study was to evaluate in vitro two different procedures for the removal of the smear layer in retrocavities prepared with ultrasonic retrotips. METHODS Twenty-eight single-rooted teeth were cleaned, shaped, and obturated with gutta-percha and sealer. The apical 3 mm of each root were cut with a carbide bur, and retrograde cavities were prepared with ProUltra ultrasonic retrotips (Maillefer Dentsply, Baillagues, Switzerland) at a depth of 3 mm. Teeth in group A were treated with a gel of 35% orthophosphoric acid for 15 seconds, and teeth in group B were treated with a gel of 24% EDTA at a neutral pH for 2 minutes. The samples were prepared for scanning electron microscopic observation and scored for the presence of the smear layer on the retrocavity walls. RESULTS Eighty percent of the teeth in group A showed an optimal degree of cleanliness of the walls, with dentinal tubules completely open. The majority of analyzed samples coming from group B showed dentinal tubules covered with the smear layer. CONCLUSIONS The analysis of the samples showed that orthophosphoric acid is more effective than EDTA in removing surgical smear layer even with less time of action.
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Camargo Villela Berbert FL, de Faria-Júnior NB, Tanomaru-Filho M, Guerreiro-Tanomaru JM, Bonetti-Filho I, Leonardo RDT, Marcantonio RAC. An in vitro evaluation of apicoectomies and retropreparations using different methods. ORAL SURGERY, ORAL MEDICINE, ORAL PATHOLOGY, ORAL RADIOLOGY, AND ENDODONTICS 2010; 110:e57-63. [PMID: 20573528 DOI: 10.1016/j.tripleo.2010.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2009] [Revised: 03/02/2010] [Accepted: 03/03/2010] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The aim of this study was to evaluate: 1) the apical root surface, gutta-percha interface, and preparation time of root-end resections made with burs, ultrasound, or laser; and 2) the thickness of surrounding dentin after laser or ultrasonic root-end cavity preparation. STUDY DESIGN 1) Thirty root-filled teeth were resected as follows: Zekrya bur in group I, Chemical Vapor Deposition (CVD) ultrasonic tip (9.5107-8) in group II, and ErCr:YSGG (Waterlase) in group III. The preparation time was recorded. Replicas of the resected root-ends were examined under a scanning electron microscope (SEM). 2) Thirty root-filled teeth were submitted to apicectomies and root-end cavities were prepared by using: CVD (6.1107-6) ultrasonic retrotips (group IV), EMS (DT-060) ultrasonic retrotips (group V), and ErCr:YSGG laser tips (group VI). Replicas of the root apices were examined under a SEM. RESULTS There were no fissures or fractures on root-end surfaces. The bur produced the smoothest surface (P < .05). Group I had the lowest preparation time (P < .05). The best adaptation between the filling and the root canals walls was observed in group III, but it was not significantly different from group II (P < .05). No resected root-ends had cracks after preparation. Group VI showed the least minimum dentin thickness (P < .05). CONCLUSIONS The 3 methods evaluated did not cause any injury to the root-end surface, but they harmed the apical adaptation. Laser tips removed more dentin than ultrasonic retrotips and should be used with care to avoid overpreparation.
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Abstract
While endodontic microsurgery has been making tremendous strides in the past 20 years, there are still basic concepts that are confusing or frustrating for the novice and experienced surgeon alike. These issues, such as microscope positioning and the relationship with the surgeon's ergonomics and line of sight to the surgical field, making use of natural hand movements and positions, are addressed in this article. Other topics include major flap designs and guidelines for their implementation, effective hemostasis using materials with less tissue toxicity, root end preparation techniques and guidelines, site-determined choice of root end filling material, and placement and finishing tips for Mineral Trioxide Aggregate.
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Affiliation(s)
- Stephen P Niemczyk
- Post Graduate Endodontic Program, Harvard School of Dental Medicine, Boston, MA, USA.
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Batista de Faria-Junior N, Tanomaru-Filho M, Guerreiro-Tanomaru JM, de Toledo Leonardo R, Camargo Villela Berbert FL. Evaluation of Ultrasonic and ErCr:YSGG Laser Retrograde Cavity Preparation. J Endod 2009; 35:741-4. [DOI: 10.1016/j.joen.2009.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2008] [Revised: 02/01/2009] [Accepted: 02/17/2009] [Indexed: 10/20/2022]
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