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Atique S, Ali K, Haroon S, Ahmed A, Javed MQ, Zafar MS, Abulhamael AM. Effectiveness of H-files and Pro-Taper universal systems in removing Gutta-percha during endodontic retreatment: A comparative study. J Taibah Univ Med Sci 2024; 19:537-544. [PMID: 38711796 PMCID: PMC11070706 DOI: 10.1016/j.jtumed.2024.04.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 03/13/2024] [Accepted: 04/12/2024] [Indexed: 05/08/2024] Open
Abstract
Objective This research was aimed at assessing the effectiveness of manual H-files versus a combination of a Pro-Taper universal rotary canal preparation system and retreatment system in removing gutta-percha (GP) during endodontic retreatment, by using a digital radiography technique. Methods This ex vivo study used a non-probability consecutive sampling technique. The study sample comprised 60 extracted anterior permanent teeth, each with one root with a straight root canal (RC). After preparation, RCs were obturated with GP and sealer. Subsequently, teeth were stored for 2 weeks in a humid environment at 37 °C. Thirty teeth each were randomly assigned to the control (group I), and experimental (group II) groups. GP removal was performed with H-files {group I) or a combination of a Pro-Taper universal rotary canal preparation system and retreatment system (group 2). Digital radiographs were acquired with Carestream digital radiovisiography software (Kodak; version-VER.6.10.8.3-A), and the presence of residual GP was analyzed. AutoCAD (2006) software was used to demarcate the RC and residual root filling. The residual GP in both groups was compared with independent sample t-tests. Results The remaining root filling did not significantly differ when GP was removed with conventional Hedstrom files versus a combination of Pro-Taper Universal preparation and retreatment file systems. The residual GP was confined to the apical third of the canals in both groups. Conclusions Pro-Taper Universal preparation and retreatment file systems have similar effectiveness to manual H-files in GP removal in straight canals.
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Affiliation(s)
- Sundus Atique
- Department of Preclinical Oral Health Sciences, College of Dental Medicine, Qatar University, Doha, Qatar
| | - Kamran Ali
- Department of Preclinical Oral Health Sciences, College of Dental Medicine, Qatar University, Doha, Qatar
| | - Saad Haroon
- Department of Endodontics, Specialist Endodontist, Primary Health Care Corporation, Qatar
| | - Alia Ahmed
- Department of Operative Dentistry, College of Dentistry, Riphah International University, Islamabad, Pakistan
| | - Muhammad Q. Javed
- Department of Conservative Dental Sciences, College of Dentistry, Qassim University, Buraidah, Qassim, KSA
| | - Muhammad S. Zafar
- Department of Restorative Dentistry, College of Dentistry, Taibah University, Almadinah Almunawwarah, KSA
- Centre of Medical and Bio-allied Health Sciences Research, Ajman University, Ajman, 346, United Arab Emirates
- School of Dentistry, University of Jordan, Amman, Jordan
- Department of Dental Materials, Islamic International Dental College, Riphah International University, Islamabad, Pakistan
| | - Ayman M. Abulhamael
- Department of Endodontics, Faculty of Dentistry, King Abdulaziz University, Jeddah, KSA
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Raj R A, Raju I, Varghese JG, Jeet Singh Birring O, Paul Yacob PJ, Chohan H. Comparative Evaluation of Debris Expulsion Beyond Apex During Re-root Canal Treatment by Utilizing Two Re-treatment Rotary Files and Two Reciprocating Files: An In-Vitro Study. Cureus 2024; 16:e56467. [PMID: 38638748 PMCID: PMC11025582 DOI: 10.7759/cureus.56467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Accepted: 03/13/2024] [Indexed: 04/20/2024] Open
Abstract
AIM This study aimed to assess and compare debris quality expelled beyond the apex during re-treatment using two reciprocating and two re-treatment rotary files. MATERIALS AND METHODS A total of 80 healthy human mandibular premolars excised for orthodontic therapy were selected. Distilled water was used to sterilize the teeth before they were preserved. The canals were widened and coronal access was created so that the F2 ProTaper universal system could be used. For the obturation, we utilized gutta-percha cones and AH plus sealant. All samples were cone-beam computed tomography (CBCT) recorded. Teeth were separated into four groups (n=20); Group 1: ProTaper re-treatment, Group 2: Mtwo re-treatment, Group 3: WaveOne gold, and Group 4: Reciproc. The re-instrumented process included collecting the extruded debris in Eppendorf tubes and then drying it off by evaporating the distilled water. The weight of the tube with debris was subtracted from the weight of the tube without debris to get the dry debris weight. Post-retreatment CBCT was recorded for all samples. Mean apical debris extrusion values were obtained, after which necessary statistical analysis was obtained using SPSS Statistics, version 21 (IBM Corp., Armonk, NY) to obtain the results. A one-way analysis of variance (ANOVA) and the student t-test were utilized for statistical analysis to compare the different experimental groups. Post-hoc Bonferroni tests were used to compare several groups. RESULT No statistical difference (p>0.05) was identified in the filler material that was left over across all groups. The reciprocating files discharged more material compared with re-treatment file systems. CONCLUSION The Reciproc files expelled more waste than WaveOne gold, ProTaper re-treatment, and Mtwo re-treatment file systems. Reciprocating file systems showed better cleaning efficiency compared to the re-treatment file systems.
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Affiliation(s)
- Akhila Raj R
- Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Viswavidyapeetham, Kochi, IND
| | - Iswarya Raju
- Conservative Dentistry and Endodontics, The Muslim Educational Society (MES) Dental College, Malappuram, IND
| | - Joel G Varghese
- Conservative Dentistry and Endodontics, Educare Institute of Dental Sciences, Malappuram, IND
| | | | - P Jeason Paul Yacob
- Conservative Dentistry and Endodontics, Amrita School of Dentistry, Amrita Viswavidyapeetham, Kochi, IND
| | - Hitesh Chohan
- Restorative Dental Sciences, College of Dentistry, Jazan University, Jazan, SAU
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Baig MM, Kalgeri SH, Kansar N, Patel P, Nair A, Elnawawy MS. Effectiveness of Different Rotary Files Systems in Removal of Gutta-percha during Endodontic Retreatment with or without Solvents: A Comparative Study. J Contemp Dent Pract 2023; 24:688-691. [PMID: 38152943 DOI: 10.5005/jp-journals-10024-3523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2023]
Abstract
AIM The purpose of the present study was to compare the efficacy of three different file systems in removing gutta-percha during endodontic retreatment with or without solvents. MATERIALS AND METHODS The current study used 120 freshly extracted, single-rooted human mandibular premolars extracted for orthodontic procedures. The canal was prepared utilizing the step-back technique and obturation was done. The samples were allocated into three experimental groups at random, group I: Hedstrom Files, group II: D-RaCe rotary system, and group III: Mtwo retreatment files system. The three groups were again split into two subgroups of 20 samples each, i.e., with solvent and without solvent. Then, a stereomicroscope with a magnification of × 20 was used to examine the samples. The amount of GP and sealer left was measured in three sections: At apical third (1 mm above the apex), middle third (8 mm from the apex), and coronal third (2 mm below the cementoenamel junction). The obtained data were analyzed using parametric Analysis of Variance (ANOVA). p-values less than 0.05 were considered significant. RESULTS The overall least debris on the dentinal surface was found in the middle third with/without solvent. The D-RaCe rotary system was 1.24 ± 0.11 and 1.44 ± 0.14, Mtwo retreatment files system was 1.38 ± 0.17 and 1.72 ± 0.09 and Hedstrom files was 2.08 ± 0.21 and 2.18 ± 0.16 respectively and A significant difference was found between the three different file system groups (p < 0.001). CONCLUSION The current study concluded that, when combined with a solvent, the D-RaCe rotary retreatment system is more effective than the Mtwo rotary retreatment system and Hedstrom Files in removing gutta-percha and sealant from root canal walls. CLINICAL SIGNIFICANCE When it comes to treating chronic infections, non-surgical retreatment is a more cautious method than periapical surgery. Retreatment should be performed efficiently and with appropriate instruments to ensure effective treatment.
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Affiliation(s)
- Mirza Muzaamill Baig
- Department of Conservative Dentistry and Endodontics, Sri Balaji Dental College & Dental Hospital, Hyderabad, Telangana, India
| | - Sowmya Halasabalu Kalgeri
- Department of Conservative Dentistry and Endodontics, JSS Dental College & Hospital, JSS Academy of Higher Education & Research (JSSAHER), Mysuru, Karnataka, India, Phone: +91 9844062989, e-mail:
| | - Nisarga Kansar
- Department of Pedodontics and Preventive Dentistry, Subbaiah Institute of Dental Sciences, Shivamogga, Karnataka, India
| | - Priya Patel
- Department of Periodontology, Narsinhbhai Patel Dental College & Hospital, Sankalchand Patel University, Visnagar, Gujarat, India
| | - Achuthan Nair
- Department of Oral and Maxillofacial Surgery, Sri Sankara Dental College, Thiruvananthapuram, Kerala, India
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Kader M, Buranade A, Algarni Y, N. Alobaid A, Baba S, Mohamed Ali A. Comparative evaluation of efficacy of protaper universal retreatment system, R-endo system and hedstrom file in gutta percha removal during root canal retreatment- An In Vitro study. JOURNAL OF PHARMACY AND BIOALLIED SCIENCES 2022; 14:S507-S510. [PMID: 36110617 PMCID: PMC9469304 DOI: 10.4103/jpbs.jpbs_74_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 02/18/2022] [Accepted: 03/06/2022] [Indexed: 11/25/2022] Open
Abstract
Background: The complete removal of residual filling materials from the root canal determines the success of root canal retreatment. Aim: To evaluate and correlate the efficacy of ProTaper retreatment system, R-Endo retreatment system, and Hedstrom file in the removal of gutta-percha and sealer from root canal during endodontic retreatment in addition to the period desired for the elimination of gutta-percha and sealer. Methodology: Thirty extracted premolars were prepared and filled by cold lateral compaction with gutta-percha and sealer. Retreatment was finished with ProTaper retreatment files, R-Endo files, Hedstrom files with Endosolv E as the solvent for 10 specimens each. Each half of the root was imaged using the image analyzer software Chroma allied to a stereomicroscope with 10× magnification via a charge-coupled device sensor. For statistical analysis, parametric one-way ANOVA test and Scheffe post hoc multiple range test were utilized at a significance level of P < 0.05. Results: There is no significant difference among the three groups at P < 0.0001 in removing filling material. However, the rotary files needed significantly less time for removing gutta-percha along with sealer than H-file (P < 0.0001). Conclusion: The gutta-percha and sealer were found in the root canal subsequent to all the retreatment techniques, especially in the apical third. Retreatment time was less only for the rotary system.
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Ajina MA, Shah PK, Chong BS. Critical analysis of research methods and experimental models to study removal of root filling materials. Int Endod J 2021; 55 Suppl 1:119-152. [PMID: 34674279 DOI: 10.1111/iej.13650] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 10/14/2021] [Accepted: 10/18/2021] [Indexed: 12/14/2022]
Abstract
Despite enjoying high favourable outcome rates, root canal treatment is not always successful. Root canal retreatment is a widely practised option for managing a non-healing root treated tooth. A basic distinction between retreatment and initial treatment is the requirement to remove the existing root filling material occupying the root canal space. Only then, can the technical deficiencies and possible causes of failure be addressed. Hence, the successful removal of the root filling material is critical to achieving the objectives of retreatment. Many different materials and techniques have been used for root canal filling, which have been documented in a plethora of studies; these are mainly laboratory studies investigating the removal of root filling materials. To help guide future research, which may then better inform clinical practice in relation to retreatment procedures, the focus of this narrative review is on the research methods and experimental models employed to study the removal of root filling materials. The current available literature demonstrates great variation in the research methodologies used to study the removal of root filling material, including direct visualization by splitting tooth samples or clearing, three-dimensional radiographic imaging including using microcomputed tomography or cone-beam computed tomography, and a combination of these techniques. Depending on the research method employed, variation also exists in quantification of root filling material removal; these include measurements of surface area, volume or weight, and criteria-based (semi-quantitative) assessment. Experimental models, using human teeth or resin models, differ with respect to standardization techniques and replication of the clinical scenario including initial sample preparation, canal filling, allocation and technical aspects of retreatment procedures. Future models should replicate, as closely as possible, the clinical scenario. Currently, microcomputed tomography provides a highly detailed, non-invasive and non-destructive method of objectively assessing and quantifying root filling removal.
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Affiliation(s)
- Mahdi A Ajina
- Institute of Dentistry, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Pratik K Shah
- Institute of Dentistry, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
| | - Bun San Chong
- Institute of Dentistry, Barts & The London School of Medicine & Dentistry, Queen Mary University of London, London, UK
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Virtual Approach to the Comparative Analysis of Biomaterials Used in Endodontic Treatment. Processes (Basel) 2021. [DOI: 10.3390/pr9060926] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
The importance of endodontics is presented within our own concept of Dentistry Sustainable Development (DSD) consisting of three inseparable elements; i.e., Advanced Interventionist Dentistry 4.0 (AID 4.0), Global Dental Prevention (GDP), and the Dentistry Safety System (DSS) as a polemic, with the hypothesis of the need to abandon interventionist dentistry in favour of the domination of dental prevention. In view of the numerous systemic complications of caries that affect 3−5 billion people globally, endodontic treatment effectively counteracts them. Regardless of this, the prevention of oral diseases should be developed very widely, and in many countries dental care should reach the poorest sections of society. The materials and methods of clinical management in endodontic procedures are characterized. The progress in the field of filling materials and techniques for the development and obturation of root canals is presented. The endodontics market is forecast to reach USD 2.1 billion in 2026, with a CAGR of 4.1%. The most widely used and recognized material for filling root canals is gutta-percha, recognized as the “gold standard”. An alternative is a synthetic thermoplastic filler material based on polyester materials, known mainly under the trade name Resilon. There are still sceptical opinions about the need to replace gutta-percha with this synthetic material, and many dentists still believe that this material cannot compete with gutta-percha. The results of studies carried out so far do not allow for the formulation of a substantively and ethically unambiguous view that gutta-percha should be replaced with another material. There is still insufficient clinical evidence to formulate firm opinions in this regard. In essence, materials and technologies used in endodontics do not differ from other groups of materials, which justifies using material engineering methodology for their research. Therefore, a detailed methodological approach is presented to objectify the assessment of endodontic treatment. Theoretical analysis was carried out using the methods of procedural benchmarking and comparative analysis with the use of contextual matrices to virtually optimize the selection of materials, techniques for the development and obturation of root canals, and methods for assessing the effectiveness of filling, which methods are usually used, e.g., in management science, and especially in foresight research as part of knowledge management. The results of these analyses are presented in the form of appropriate context matrices. The full usefulness of the research on the effectiveness and tightness of root canal filling using scanning electron microscopy is indicated. The analysis results are a practical application of the so-called “digital twins” approach concerning the virtual comparative analysis of biomaterials used in endodontic treatment.
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7
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Ali A, Saraf P, Kamatagi L, Khasnis S. Comparative Assessment of Canal Transportation, Dentin Loss, and Remaining Root Filling Material by Different Retreatment Files An In vitro Cross-Sectional Study. Contemp Clin Dent 2021; 12:14-20. [PMID: 33967532 PMCID: PMC8092085 DOI: 10.4103/ccd.ccd_31_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 04/22/2020] [Accepted: 05/29/2020] [Indexed: 11/23/2022] Open
Abstract
Aim: The purpose of this study was to evaluate the centering ability, canal transportation and efficacy of re-treatment rotary and hand files in removing Gutta Percha from root canals using Cone Beam Computed Tomography(CBCT). Materials and Methods: Sixty extracted human maxillary anteriors were obturated and randomly divided into three groups. Root fillings were removed with ProTaper Universal retreatment system, R-Endo system, and Hedstrom files. CBCT scans were taken. Statistical Analysis and Results: The data were analyzed using the Statistical Package for the Social Sciences (SPSS 15.0, IBM). The mean and standard deviation among the groups was calculated by one-way analysis of variance, Kruskal–Wallis, and Mann– Whitney U-tests, and the comparison among the various groups was done by post hoc Tukey's test. A statistically significant amount of remaining root canal filling material and canal transportation was noted (P < 0.05). Conclusion: No system completely removed the root filling material from root canals. Manual instrumentation resulted in more dentin loss and canal transportation than rotary file system.
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Affiliation(s)
- Afzal Ali
- Department of Conservative Dentistry and Endodontics, Pacific Dental College and Hospital, Udaipur, Rajasthan, India
| | - Prahlad Saraf
- Department of Conservative Dentistry and Endodontics, PMNM Dental College and Hospital, Navanagar, Bagalkot, Karnataka, India
| | - Laxmikant Kamatagi
- Department of Conservative Dentistry and Endodontics, PMNM Dental College and Hospital, Navanagar, Bagalkot, Karnataka, India
| | - Sandhya Khasnis
- Department of Conservative Dentistry and Endodontics, PMNM Dental College and Hospital, Navanagar, Bagalkot, Karnataka, India
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Uzunoglu-Özyürek E, Küçükkaya Eren S, Karahan S. Contribution of XP-Endo files to the root canal filling removal: A systematic review and meta-analysis of in vitro studies. AUST ENDOD J 2021; 47:703-714. [PMID: 33713515 DOI: 10.1111/aej.12503] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 02/18/2021] [Accepted: 02/25/2021] [Indexed: 12/11/2022]
Abstract
This review was designed to analyse whether the supplementary use of XP-Endo Finisher and XP-Endo Finisher R contributes to the removal of root canal filling materials. Databases were searched up to November 2020. Studies were critically assessed according to inclusion and exclusion criteria. Risk of bias evaluation was performed. Pooled standardised mean differences (SMD) and 95% confidence intervals (95% CI) were calculated. Ten studies involving 192 teeth were eligible for systematic review and meta-analysis could be performed with eight of these studies. Strong evidence showed that XP-Endo Finisher R file contributed significantly to filling material removal from root canals (SMD (95% CI): 0.41 (0.06-0.76)). Although the evidence was conflicting, XP-Endo Finisher R file was superior than other irrigant activation techniques (SMD (95% CI): 0.47 (0.02-0.93)). The supplementary use of XP-Endo Finisher and XP-Endo Finisher R is beneficial in further removal of root canal filling materials from root canal system.
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Affiliation(s)
- Emel Uzunoglu-Özyürek
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Selen Küçükkaya Eren
- Department of Endodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Sevilay Karahan
- Department of Biostatistics, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Purba R, Sonarkar SS, Podar R, Singh S, Babel S, Kulkarni G. Comparative evaluation of retreatment techniques by using different file systems from oval-shaped canals. J Conserv Dent 2020; 23:91-96. [PMID: 33223649 PMCID: PMC7657436 DOI: 10.4103/jcd.jcd_167_20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 06/26/2020] [Accepted: 07/21/2020] [Indexed: 11/13/2022] Open
Abstract
Introduction: Endodontic failure resolves after complete removal of obturating material followed by disinfection, cleaning, shaping and three-dimensional obturation. Materials and Methods: Seventy single-rooted mandibular premolars, with single oval-shaped root canal were included. They were decoronated at a length of 16 mm from the apex. Shaping and cleaning were performed, and obturation was done using the warm lateral compaction technique. The teeth were divided into seven groups according to retreatment procedures (Hand files; ProTaper Universal retreatment files; MTwo® Retreatment system; R-Endo® Retreatment system; ProTaper Universal retreatment files with solvent and ultrasonics; MTwo® R with solvent, and ultrasonics and R-Endo® with solvent and ultrasonics). The data were obtained and subjected to the statistical analysis. Results: All instrumentation techniques left obturating material with least in Group 6 and maximum Group 5. The mean time taken for complete retreatment procedure was minimum in Group 2 and maximum with Group 1. Conclusion: MTwo® R with solvent and ultrasonics, R-Endo®, and R-Endo® with solvent and ultrasonics were effective in gutta-percha removal from coronal third, middle third, and apical third, respectively. Significance: Nonsurgical endodontic retreatment using rotary files helps in gaining access to infected teeth. During retreatment procedure, this helps disinfectant to reach in critical areas of the root canal system, thereby decreasing the microbial load, leading to achieve healthy periradicular tissues.
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Affiliation(s)
| | - Snehal S Sonarkar
- Department of Conservative Dentistry and Endodontics, VSPM Dental College and Research Centre, Nagpur, Maharashtra, India
| | - Rajesh Podar
- Department of Conservative Dentistry and Endodontics, Terna Dental College, Navimumbai, Maharashtra, India
| | - Shishir Singh
- Department of Conservative Dentistry and Endodontics, Terna Dental College, Navimumbai, Maharashtra, India
| | - Shashank Babel
- Department of Conservative Dentistry and Endodontics, Terna Dental College, Navimumbai, Maharashtra, India
| | - Gaurav Kulkarni
- Department of Conservative Dentistry and Endodontics, Terna Dental College, Navimumbai, Maharashtra, India
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Dotto L, Sarkis-Onofre R, Bacchi A, Pereira GKR. The use of solvents for gutta-percha dissolution/removal during endodontic retreatments: A scoping review. J Biomed Mater Res B Appl Biomater 2020; 109:890-901. [PMID: 33155731 DOI: 10.1002/jbm.b.34753] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 10/02/2020] [Accepted: 10/06/2020] [Indexed: 11/05/2022]
Abstract
This scoping review study aimed to map the evidence about solvents' use for gutta-percha dissolution and removal during endodontic retreatments. The study protocol followed the Joanna Briggs Institute guidelines, available online (https://osf.io/5vy8n/). Reporting was based on PRISMA Extension for Scoping Reviews. We selected dentistry studies that considered the effectiveness of solvents in gutta-percha dissolution in endodontic retreatments and compared their performance to the use of instrumentation techniques without solvents. The search and study screening were performed in PubMed and Scopus databases by two independent researchers. A descriptive analysis considered the study design, method/technique used for obturation, method/technique used for instrumentation during retreatment, solvent solutions tested, exposure time, and main findings. A total of 41 studies were included. Despite that, most studies suggested that solvents' use may complicate root canal cleanliness, regardless of the type of instrumentation used, and facilitate the presence of gutta-percha remnants in the root surface. Thus, the use of solvents should be avoided and its use should only be considered if the previous working length was not possible to access without it. Despite that, high heterogeneity was observed, further studies are still encouraged comparing the performance and effects of different solvents in different clinical scenarios.
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Affiliation(s)
- Lara Dotto
- MSciD Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty-IMED, Passo Fundo, Brazil
| | - Rafael Sarkis-Onofre
- MSciD Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty-IMED, Passo Fundo, Brazil
| | - Ataís Bacchi
- MSciD Post-Graduate Program in Dentistry, School of Dentistry, Meridional Faculty-IMED, Passo Fundo, Brazil
| | - Gabriel Kalil Rocha Pereira
- MSciD and Phd Post-Graduate Program in Oral Sciences, Federal University of Santa Maria (UFSM), Santa Maria, Brazil
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11
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Baxter S, Schöler C, Dullin C, Hülsmann M. Sensitivity of conventional radiographs and cone-beam computed tomography in detecting the remaining root-canal filling material. J Oral Sci 2020; 62:271-274. [PMID: 32493862 DOI: 10.2334/josnusd.19-0100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
This study aimed to compare the sensitivity of radiographs and flat-panel volume-computed tomography (fpVCT) in detecting the remaining root-canal filling material. Thirty-two root canals in extracted human mandibular molars were prepared and obturated with gutta-percha and sealer. The filling material was removed, and the teeth were split longitudinally. Radiographs and fpVCT scans were obtained and digitized. Virtual images were developed using reconstruction software and then superimposed, and the remaining filling material was outlined. Direct observation of the split root halves using flatbed scans served as a control. The presence and extension of the remaining filling material were evaluated. Statistical analysis was conducted using chi-squared test (P < 0.05). A total of 116 remnants were detected in the flatbed scans, 81 in the fpVCT scans, and 90 in the radiographs, with no significant difference between the radiograph (78%) and fpVCT (70%) results (P = 0.18). In the fpVCT scans, 42% of the remnants exhibited the same dimensions as the control, whereas 27% appeared larger and 30% appeared smaller. In the radiographs, the dimensions of the remnants were identical to the control in 64% of cases, smaller in 29%, and larger in 7%. FpVCT did not exhibit better performance than dental radiographs in detecting the remaining root-canal-filling material: the extension of remnants was indicated correctly in the fpVCT in fewer than 50% of the samples.
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Affiliation(s)
- Steffi Baxter
- Department of Preventive Dentistry, Periodontology and Cariology, University of Göttingen
| | - Christian Schöler
- Department of Preventive Dentistry, Periodontology and Cariology, University of Göttingen
| | | | - Michael Hülsmann
- Department of Preventive Dentistry, Periodontology and Cariology, University of Göttingen
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12
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Sadat Shojaee N, Vakilinezhad E, Shokouhi MM. In Vitro Comparison of Efficacy of Neolix and ProTaper Universal Retreatment Rotary Systems in Removal of Gutta-Percha Combined with Two Different Sealers. JOURNAL OF DENTISTRY (SHIRAZ, IRAN) 2019. [PMID: 31875176 DOI: 10.30476/dentjods.2019.77825.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Statement of the Problem The complete removal of filling material is an important step to regain access to the entire canal and facilitate the disinfection of the root canal system. Rotary nickel-titanium (NiTi) instruments systems have been proposed as an effective removal technique for root canal retreatment. Purpose The aim of this study was to evaluate the efficacy of Neolix rotary system and ProTaper Universal retreatment system in the removal of gutta-percha combined with two different sealers. Materials and Method In vivo study, eighty extracted human permanent mandibular premolars were prepared using the ProTaper Universal rotary system to an apical size 30 (F3/0.06). The specimens were randomly divided into 4 groups (n=20) and subsequently filled with lateral condensation of gutta-percha and two sealers: AH-26 and Sure-Seal Root. The teeth were stored for 4 weeks at 37°C and 100% humidity and then retreated by one of the following rotary systems: Neolix or ProTaper Universal retreatment system. Teeth were then grooved and monitored under a stereomicroscope with 8× magnification. The images were transferred to the computer and the amount of filling material that remained on the root canal walls was scored using AutoCAD 2017 version 1.1software. Results were analyzed using one-way analysis of variance test and post hoc Tukey-HSD test (p< 0.05). Results The mean percentage of remaining gutta-percha and sealer was significantly higher in apical third in all groups (p< 0.01). Post hoc Tukey test showed that there is significantly higher residual filling material in the group filled with gutta-percha and Sure-Seal Root sealer and retreated by Neoniti rotary system compared with other groups in both coronal and middle third of the canal. Conclusion The Neoniti rotary system was as effective as ProTaper Universal retreatment system in retreatment of gutta-percha and AH-26 sealer but was significantly less effective in groups obturated with Sure-Seal Root sealer.
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Affiliation(s)
- Nooshin Sadat Shojaee
- Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Ehsan Vakilinezhad
- Undergraduate Student, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Mohammad Mehdi Shokouhi
- Dept. of Endodontics, School of Dentistry, Shiraz University of Medical Sciences, Shiraz, Iran
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Incorporating N-acetylcysteine and tricalcium phosphate into epoxy resin-based sealer improved its biocompatibility and adhesiveness to radicular dentine. Dent Mater 2019; 35:1750-1756. [PMID: 31610888 DOI: 10.1016/j.dental.2019.09.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 09/04/2019] [Accepted: 09/08/2019] [Indexed: 11/20/2022]
Abstract
OBJECTIVE This in vitro study was designed to evaluate the biocompatibility, adhesiveness, and antimicrobial activity of epoxy resin-based sealer associated with N-Acetylcysteine (NAC) or beta-tricalcium phosphate nanoparticles (β-TCP) as an experimental retro-filling material. METHODS Cytotoxicity was assessed using 2,3-Bis-(Methoxy-4-Nitro-5-Sulphophenyl)-2H-Tetrazolium-5-Carboxanilide (XTT) and Sulforhodamine B (SRB) assays after exposing human periodontal ligament fibroblasts to extracts of the materials for 1, 3, or 7 days. For the adhesive resistance test, root canals (48 single-root teeth) were instrumented with Reciproc #40 files (VDW GmbH, Germany) and obturated. After 7 days, the apices were sectioned and a retrograde cavity prepared and filled with the experimental materials (Mineral trioxide aggregate, Epoxy sealer, Epoxy sealer+NAC, and Epoxy sealer+β-TCP). For the push-out test, one 2-mm thick slice was obtained from the apical third of each specimen. Antimicrobial activity was performed using agar diffusion method. Biofilms were grown in microplates and exposed to the extracts of retro-filled materials, followed by analysis of growth inhibition on agar plates. RESULTS Epoxy sealer in association with β-TCP or NAC showed better bond strength while Mineral trioxide aggregate allowed for the lowest adhesion. Mineral trioxide aggregate, Epoxy sealer+β-TCP, and Epoxy sealer+NAC showed low cytotoxicity. Epoxy sealer was the most cytotoxic. In antimicrobial activity assays, all materials had no effect on Candida albicans. Addition of NAC improved the antimicrobial property of Epoxy sealer against Enterococcus faecalis compared to unmodified Epoxy sealer (P<0.05). SIGNIFICANCE Incorporating β-TCP or NAC with Epoxy sealer could improve the adhesiveness and biocompatibility for better use in endodontic therapy.
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Campello AF, Almeida BM, Franzoni MA, Alves FRF, Marceliano-Alves MF, Rôças IN, Siqueira JF, Provenzano JC. Influence of solvent and a supplementary step with a finishing instrument on filling material removal from canals connected by an isthmus. Int Endod J 2018; 52:716-724. [PMID: 30481389 DOI: 10.1111/iej.13047] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2018] [Accepted: 11/21/2018] [Indexed: 11/27/2022]
Abstract
AIM To evaluate the effectiveness of a solvent (eucalyptol) in improving filling material removal from canals connected by isthmuses, and the additional cleaning effect of a finishing instrument. METHODOLOGY The mesial canals from 32 mandibular molars (Vertucci's type II morphology) were instrumented and filled with the single-cone technique using Reciproc R25 gutta-percha points (VDW, Munich, Germany) combined with Sealer 26 (Dentsply, Petrópolis, RJ, Brazil). Each root was then subjected to retreatment using the Mtwo instrument system (VDW), with or without a solvent (n = 16 per group). The volume of filling material in the canals was assessed by micro-computed tomographic (micro-CT) scans taken before and after retreatment. Canals with remnants of filling material received a supplementary procedure with the XP-endo Finisher R instrument (FKG Dentaire, La Chaux-de-Fonds, Switzerland), with or without eucalyptol, and another micro-CT scan was taken. All retreatment procedures were performed inside a cabinet under a controlled temperature (37 °C). Filling material removal was evaluated in the 5-mm apical canal system for the canal+isthmus space or the isthmus alone. Statistical analyses were performed to compare the removal of filling material with and without eucalyptol, and after a supplementary approach with XP-endo Finisher R. The level of significance was set at 5% for all statistical tests (P < 0.05). RESULTS The amount of filling material removed from the canal+isthmus with Mtwo instruments was 83.2% when no solvent was used and 83.8% using the solvent (P > 0.05). When the isthmus area was evaluated separately, most specimens were associated with a reduction in the filling material, with no significant difference between the groups with or without using a solvent (P > 0.05). The supplementary step with XP-endo Finisher R significantly improved removal of filling material from both canal and isthmus area (P < 0.05), regardless of the use of a solvent (P > 0.05). CONCLUSION The use of eucalyptol did not improve filling material removal from Vertucci's type II molar mesial canals and isthmuses. XP-endo Finisher R significantly enhanced removal of filling material from the canals and isthmuses.
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Affiliation(s)
- A F Campello
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - B M Almeida
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - M A Franzoni
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - F R F Alves
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - M F Marceliano-Alves
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - I N Rôças
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - J F Siqueira
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - J C Provenzano
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
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Sijeria P, Bhartia R, Swamy Kv N, Kulkarni S, Singla S. Evaluation of Root Canal Filling in Primary Teeth by Volumetric Analysis: In Vitro Study. Int J Clin Pediatr Dent 2018; 11:386-392. [PMID: 30787551 PMCID: PMC6379537 DOI: 10.5005/jp-journals-10005-1545] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2018] [Accepted: 09/13/2018] [Indexed: 11/29/2022] Open
Abstract
Purpose This study was conducted to evaluate the efficacy of various techniques to fill root canals of primary teeth by volumetric analysis using cone beam computed tomography (CBCT) to assess percentage of obturated volume (POV), percentage volume of voids (PVV), and depth-of-fill. Methodology Root canals in 40 extracted deciduous maxillary incisors were instrumented with H-files to size 35 and volume of the canal measured using CBCT under “On Demand 3D AppTM Software” (Cybermed Inc. Medical 3D imaging software). The teeth were divided into four groups of 10 samples each and root filled by Lentulo spiral mounted on slow-speed hand-piece, NaviTip System, Bi-directional spiral and Combination method i.e. Lentulo spiral mounted on slow speed hand-piece followed by NaviTip syringe respectively, after that depth-of-fill for each group was checked. Then, the filled canal volume was measured using CBCT under “On Demand 3D AppTM Software”. Further, the (POV), (PVV) was calculated. Statistical analysis The data were statistically analysed using one-way ANOVA, Turkey post Hoc test and Pearson’s Chi-square test. Clinical significance Adequate adaptation of root canal filling material decreases the chance of microorganism regrowth, reinfection due to voids creation and minimizes the potential drawback of overfilling like foreign body reaction or deflection of the unerupted permanent tooth. Results The four groups were comparable in canal volume. The overall percentage of obturated volume was 53%, 59.7%, 40.3% and 75.1%; the overall percentage volume of voids was 48%, 40.3%, 58.6%, 29.5%; optimally filled canals for each group was 80%, 60%, 30% and 90% respectively (p < 0.05). Conclusion The greatest percentage of obturated volume and maximum number of optimally filled canals was obtained in method combining both Lentulo spiral in slow speed hand piece along with NaviTip system. Whereas, voids were the constant finding with all root fillings. How to cite this article: Sijeria P, Bhartia R, Swamy KVN, Kulkarni S, Singla S. Evaluation of Root Canal Filling in Primary Teeth by Volumetric Analysis: In Vitro Study. Int J Clin Pediatr Dent, 2018;11(5):386-392.
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Affiliation(s)
- Prachi Sijeria
- Senior Lecturer, Department of Pedodontics, Rishiraj College of Dental Science, Bhopal, Madhaya Pradesh, India
| | - Rahul Bhartia
- Senior Lecturer, Department of Conservative Dentistry and Endodontics, Rishiraj College of Dental Science, Bhopal, Madhaya Pradesh, India
| | - Nanjunda Swamy Kv
- Professor, Department of Paediatric Dentistry, Sri Aurobindo College of Dentistry, Indore, Madhaya Pradesh, India
| | - Sadanand Kulkarni
- Professor and HOD, Department of Paediatric Dentistry, Sri Aurobindo College of Dentistry, Indore, Madhaya Pradesh, India
| | - Shilpy Singla
- Professor and HOD, Department of Paediatric Dentistry, Rishiraj College of Dental Science, Bhopal, Madhaya Pradesh, India
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Das S, De Ida A, Das S, Nair V, Saha N, Chattopadhyay S. Comparative evaluation of three different rotary instrumentation systems for removal of gutta-percha from root canal during endodontic retreatment: An in vitro study. J Conserv Dent 2018; 20:311-316. [PMID: 29386777 PMCID: PMC5767824 DOI: 10.4103/jcd.jcd_132_17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Context: Endodontic retreatment is performed in teeth with endodontic failures. The main goal of retreatment is cleaning and shaping of the root canal with removal of old root filling material. Hand instruments and rotary instruments are mainly used for removing this filling material. Aim of Study: To compare the relative efficacy of three rotary instrumentation systems for removal of gutta-percha from root canal during endodontic retreatment. Objective of Study: To find out which NiTi system is more efficacious in retreatment and to check out the efficacy of retreatment with and without use of solvent. Materials and Methods: Sixty freshly extracted, single-rooted human mandibular premolars were instrumented with K-files, and each root canal was filled with gutta-percha and AH Plus (Dentsply Detrey, Konstanz, Germany) sealer using lateral compaction. Specimens were then divided into three experimental groups with twenty specimens each. Groups were then subdivided into ten specimens each. Groups were then retreated either with or without solvent. The removal of gutta-percha was performed using ProTaper retreatment files, Mtwo retreatment files, and R-Endo files after 2 weeks. The amount of root canal filling material remnant in the coronal, middle, and apical thirds was measured using stereomicroscope and computer image analysis program. Statistical Analysis Used: Data were evaluated statistically using analysis of variance. Results: ProTaper group was found to have less remnant filling material as compared to the other groups in coronal and middle thirds, but a significant difference was observed between ProTaper and Mtwo and Mtwo and R-Endo in the nonsolvent groups (P < 0.05). Mtwo group demonstrated less amount of remaining filling material in the nonsolvent group. Conclusions: Both nickel–titanium systems and ProTaper and Mtwo retreatment file systems, were found to be effective in the removal of root canal filling material. However, complete removal of gutta-percha from root canals did not occur with any of the experimental groups.
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Affiliation(s)
- Siddhartha Das
- Department of Conservative Dentistry, North Bengal Dental College and Hospital, Darjeeling, India
| | - Ataide De Ida
- Department of Conservative Dentistry, Goa Dental College and Hospital, Goa, India
| | - Subhasis Das
- Department of Conservative Dentistry, Burdwan Dental College and Hospital, Bardhaman, West Bengal, India
| | - Vineet Nair
- Department of Periodontia, North Bengal Dental College and Hospital, Darjeeling, India
| | - Nairita Saha
- Department of Oral Medicine and Radiology, North Bengal Dental College and Hospital, Darjeeling, India
| | - Sayan Chattopadhyay
- Department of Oral Medicine and Radiology, North Bengal Dental College and Hospital, Darjeeling, India
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Yılmaz F, Koç C, Kamburoğlu K, Ocak M, Geneci F, Uzuner MB, Çelik HH. Evaluation of 3 Different Retreatment Techniques in Maxillary Molar Teeth by Using Micro-computed Tomography. J Endod 2017; 44:480-484. [PMID: 29229455 DOI: 10.1016/j.joen.2017.09.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Revised: 09/05/2017] [Accepted: 09/17/2017] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Nonsurgical retreatment procedure involves the complete removal of the previous filling material to allow thorough instrumentation, disinfection, and refilling of root canal system. We aimed to determine the residuals of the root-filling material by using 3 different retreatment techniques with the aid of micro-computed tomography. METHODS Thirty extracted human maxillary molar teeth were included. All root canals were also obturated with F2 ProTaper single cones and AH Plus sealer. The following retreatment techniques were performed: group 1, ProTaper retreatment files; group 2, Mtwo retreatment files; and group 3, ProFile files. For the assessment of residual filling material, preoperative and postoperative micro-computed tomography scans were compared with each other, and the working time was recorded. One-way analysis of variance was used to analyze the differences between the groups. The significance level was set at P < .05. RESULTS None of the retreatment techniques were capable of removing the whole filling material. The percentages of the residual filling materials for groups 1, 2, and 3 were 34.45, 45.43, and 23.63, respectively. There was a statistically significant difference between groups 2 and 3 (P < .05). ProTaper and ProFile instruments required less time for the removal of filling materials when compared with Mtwo instrument. CONCLUSIONS ProFile files revealed the best results for endodontic retreatment in terms of both removing capacity and time requirement.
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Affiliation(s)
- Funda Yılmaz
- Department of Endodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - Cemre Koç
- Department of Endodontics, Faculty of Dentistry, Ankara University, Ankara, Turkey
| | - Kıvanç Kamburoğlu
- Department of Dentomaxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey.
| | - Mert Ocak
- Department of Anatomy, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Ferhat Geneci
- Department of Anatomy, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - M Bora Uzuner
- Department of Anatomy, Faculty of Medicine, Kafkas University, Kars, Turkey
| | - Hakan Hamdi Çelik
- Department of Anatomy, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Bartols A, Robra BP, Walther W. The ability of Reciproc instruments to reach full working length without glide path preparation: a clinical retrospective study. PeerJ 2017; 5:e3583. [PMID: 28804693 PMCID: PMC5550015 DOI: 10.7717/peerj.3583] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Accepted: 06/26/2017] [Indexed: 11/20/2022] Open
Abstract
Background Reciproc instruments are the only contemporary root canal instruments where glide path preparation is no longer strictly demanded by the manufacturer. As the complete preparation of root canals is associated with success in endodontic treatment we wanted to assess the ability and find predictors for Reciproc instruments to reach full working length (RFWL) in root canals of maxillary molars in primary root canal treatment (1°RCTx) and retreatment (2°RCTx) cases. Methods This retrospective study evaluated 255 endodontic treatment cases of maxillary molars. 180 were 1°RCTx and 75 2°RCTx. All root canals were prepared with Reciproc instruments. The groups were compared and in a binary logistic regression model predictors for RFWL were evaluated. Results A total of 926 root canals were treated with Reciproc without glide path preparation. This was possible in 885 canals (95.6%). In 1°RCTx cases 625 of 649 (96.3%) canals were RFWL and in 2°RCTx cases 260 of 277 (93.9%). In second and third mesiobuccal canals (MB2/3) 90 out of 101 (89.1%) were RFWL with Reciproc in 1°RCTx and in the 2°RCTx treatment group 49 out of 51 cases (96.1%). In mesio-buccal (MB1) canals “2°RCTx” was identified as negative predictor for RFWL (OR 0.24 (CI [0.08–0.77])). In MB2/3 canals full working length was reached less often (OR 0.04 (CI [0.01–0.31])) if the tooth was constricted and more often if MB2/3 and MB1 canals were convergent (OR 4.60 (CI [1.07–19.61])). Discussion Using Reciproc instruments, the vast majority of root canals in primary treatment and retreatment cases can be prepared without glide path preparation.
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Affiliation(s)
- Andreas Bartols
- Dental Academy for Continuing Professional Development Karlsruhe, Karlsruhe, Germany.,Clinic for Conservative Dentistry and Periodontology, Christian-Albrechts-University Kiel, Kiel, Germany
| | - Bernt-Peter Robra
- Institute of Social Medicine and Health Economics, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Winfried Walther
- Dental Academy for Continuing Professional Development Karlsruhe, Karlsruhe, Germany
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Karamifar K, Mehrasa N, Pardis P, Saghiri MA. Cleanliness of Canal Walls following Gutta-Percha Removal with Hand Files, RaCe and RaCe plus XP-Endo Finisher Instruments: A Photographic in Vitro Analysis. IRANIAN ENDODONTIC JOURNAL 2017; 12:242-247. [PMID: 28512494 PMCID: PMC5431710 DOI: 10.22037/iej.2017.47] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
INTRODUCTION Gutta-percha must be removed from the root canal space during retreatment to ensure a more favorable outcome. The aim of this study was to compare the efficacy of hand instruments, RaCe and RaCe plus XP-endo finisher instruments in removal of gutta-percha from root canal walls during retreatment. METHODS AND MATERIALS Thirty single-rooted premolars were prepared, obturated, and divided into three groups according to retreatment method; in group 1, retreatment was carried out by hand instruments, while in groups 2 and 3 retreatment was done using RaCe rotary files alone or accompanied by XP-endo finisher instruments, respectively. After retreatment, teeth were sectioned longitudinally and photographic images were taken. The amount of remaining gutta-percha in coronal, middle and apical thirds was quantified using Image J software. The two-way ANOVA and post hoc Tukey's tests were used to analyze data. The level of significance was set at 0.05. RESULTS RaCe cleaned the apical third significantly better than hand instrumentation. In the coronal third, RaCe+XP-endo finisher was more effective than RaCe. RaCe+XP-endo finisher was more effective than hand instrumentation in the entire root canal. The amount of remaining gutta-percha was the least in the apical part and increased toward the coronal part with the use of XP-endo finisher (P<0.05). CONCLUSION Rotary instrumentation was more effective in removing gutta-percha from the canal walls. Furthermore, use of XP-endo finisher file resulted in cleaner canal walls and was more effective in removing gutta-percha from the coronal toward the apical part of the canal.
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Affiliation(s)
- Kasra Karamifar
- Department of Endodontics, Dental School, Islamic Azad University, Shiraz Branch, Shiraz, Iran
| | - Neda Mehrasa
- Department of Endodontics, Dental School, Islamic Azad University, Shiraz Branch, Shiraz, Iran
| | - Pouyan Pardis
- Department of Endodontics, Dental School, Islamic Azad University, Shiraz Branch, Shiraz, Iran
| | - Mohammad Ali Saghiri
- Wisconsin Institute for Medical Research, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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Yavari H, Shahi S, Galledar S, Samiei M, Janani M. Effect of retreatment on the push-out bond strength of MTA-based and epoxy resin-based endodontic sealers. J Dent Res Dent Clin Dent Prospects 2017; 11:43-47. [PMID: 28413595 PMCID: PMC5390125 DOI: 10.15171/joddd.2017.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2014] [Accepted: 11/07/2016] [Indexed: 11/12/2022] Open
Abstract
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. In both groups, the teeth were randomly subdivided into 2 subgroups. No retreatment was carried out in subgroups A1 and B1, while subgroups A2 and B2 were retreated with rotary files and a solvent. Then, a push-out test was performed on four 2-mm slices of each tooth at a distance of 2 mm from the coronal surface after two weeks of incubation. Data were analyzed with two-way ANOVA and statistical significance was set at P<0.05. Results. Regardless of the procedure followed (P<0.001), significant differences were detected in the mean bond strength values between the two sealers. Irrespective of the sealer type (P=0.3), no significant differences were revealed by comparing the mean bond strength values of the study subgroups. Furthermore, no statistically significant interaction (P=0.5) was found between the treatment and sealer types. Conclusion. AH Plus sealer exhibited a higher bond strength compared to MTA Fillapex. Retreatment using rotary files and chloroform had no statistically significant effect on the bond strength of sealers evaluated in this study.
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Affiliation(s)
- Hamidreza Yavari
- Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Shahriar Shahi
- Dental and Periodontal Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Saeedeh Galledar
- Department of Endodontics, Faculty of Dentistry,Ardabil University of Medical Sciences, Ardabil, Iran
| | - Mohammad Samiei
- Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Maryam Janani
- Department of Endodontics, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
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Ozyurek T, Ozsezer-Demiryurek E. Efficacy of protaper next and protaper universal retreatment systems in removing gutta-percha in curved root canals during root canal retreatment. J Istanb Univ Fac Dent 2017; 51:7-13. [PMID: 28955590 PMCID: PMC5573468 DOI: 10.17096/jiufd.97431] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 08/08/2016] [Indexed: 11/28/2022] Open
Abstract
Purpose: The aim of this study was to compare the cleanliness of root canal walls after retreatment using ProTaper Next (PTN), ProTaper Universal
Retreatment (PTR) nickel-titanium (NiTi) systems and Hedström hand files in curved mesial canals of mandibular molar teeth and the time required for gutta-percha and
sealer removal. Materials and Methods: Ninety mandibular molar teeth with curved mesial roots were instrumented up to #35.04 with Mtwo NiTi rotary instruments and
obturated using the continuous wave of condensation technique. Removal of gutta-percha and sealer was performed using one of the following: PTN and PTR NiTi systems
and Hedström hand files. Samples were placed on the VistaScan phosphor plates in the mesio-distal direction and the radiographs were taken. The digital radiographs
were analyzed using AutoCAD software. Also, the total time required for gutta-percha removal was calculated by a chronometer. Results: The total retreatment time was significantly shorter in the PTN and PTR groups compared with the manual group (p<0.05). There was a
significant difference between the groups according to the total residual gutta-percha and sealer (p<0.05). The PTN and PTR groups left significantly less
gutta-percha and sealer remnant than the manual group (p<0.001). Conclusion: Within the limitations of this study, the PTN and PTR groups showed less residual gutta-percha and sealer than the manual group. The NiTi
rotary systems were significantly faster than the manual group in the time required for gutta-percha and sealer removal.
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Affiliation(s)
- Taha Ozyurek
- Department of Endodontics Faculty of Dentistry Ondokuz Mayıs University Turkey
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Keskin C, Sariyilmaz E, Sariyilmaz O. Effect of solvents on apically extruded debris and irrigant during root canal retreatment using reciprocating instruments. Int Endod J 2017; 50:1084-1088. [DOI: 10.1111/iej.12729] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Accepted: 11/28/2016] [Indexed: 11/29/2022]
Affiliation(s)
- C. Keskin
- Department of Endodontics; Faculty of Dentistry; Ondokuz Mayıs University; Samsun
| | - E. Sariyilmaz
- Department of Endodontics; Faculty of Dentistry; Ordu University; Ordu Turkey
| | - O. Sariyilmaz
- Endodontics Clinics; Ordu Oral and Dental Health Center; Ordu Turkey
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Joseph M, Ahlawat J, Malhotra A, Rao M, Sharma A, Talwar S. In vitro evaluation of efficacy of different rotary instrument systems for gutta percha removal during root canal retreatment. J Clin Exp Dent 2016; 8:e355-e360. [PMID: 27703601 PMCID: PMC5045680 DOI: 10.4317/jced.52488] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2015] [Accepted: 02/10/2016] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND Complete removal of old filling material during root canal retreatment is fundamental for predictable cleaning and shaping of canal anatomy. Most of the retreatment methods tested in earlier studies have shown inability to achieve complete removal of root canal filling. Therefore the aim of this investigation was to assess the efficacy of three different rotary nickel titanium retreatment systems and Hedstrom files in removing filling material from root canals. MATERIAL AND METHODS Sixty extracted mandibular premolars were decoronated to leave 15 mm root. Specimen were hand instrumented and obturated using gutta percha and AH plus root canal sealer. After storage period of two weeks, roots were retreated with three (Protaper retreatment files, Mtwo retreatment files, NRT GPR) rotary retreatment instrument systems and Hedstroem files. Subsequently, samples were sectioned longitudinally and examined under stereomicroscope. Digital images were recorded and evaluated using Digital Image Analysing Software. The retreatment time was recorded for each tooth using a stopwatch. The area of canal and the residual filling material was recorded in mm2 and the percentage of remaining filling material on canal walls was calculated. Data was analysed using ANOVA test. RESULTS Significantly less amount of residual filling material was present in protaper and Mtwo instrumented teeth (p < 0.05) compared to NRT GPR and Hedstrom files group. Protaper instruments also required lesser time during removal of filling material followed by Mtwo instruments, NRT GPR files and Hedstrom files. CONCLUSIONS None of the instruments were able to remove the filling material completely from root canal. Protaper universal retreatment system and Mtwo retreatment files were more efficient and faster compared to NRT GPR fles and Hedstrom files. Key words:Gutta-percha removal, nickel titanium, root canal retreatment, rotary instruments.
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Affiliation(s)
- Mercy Joseph
- MDS. Conservative Dentistry and Endodontics, D.A.P.M.R.V. Dental College, Bangalore, India
| | - Jyoti Ahlawat
- Senior Resident. Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Amit Malhotra
- Senior Resident. Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India
| | - Murali Rao
- Professor. Department of Conservative Dentistry and Endodontics, D.A.P.M.R.V. Dental College, Bangalore, India
| | - Abhimanyu Sharma
- MDS. Oral and Maxillofacial Surgery, ESIC Hospital, Rohini, New Delhi, India
| | - Sangeeta Talwar
- Professor. Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences New Delhi, India
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Preetam CS, Chandrashekhar M, Gunaranjan T, Kumar SK, Miskeen Sahib SA, Kumar MS. A comparative evaluation of two rotary Ni-Ti instruments in the removal of gutta-percha during retreatment. J Int Soc Prev Community Dent 2016; 6:S131-6. [PMID: 27652245 PMCID: PMC5022390 DOI: 10.4103/2231-0762.189740] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
AIM The purpose of this study is to achieve an effective method to remove root canal filling material from the root canal system. The study, thus, aims to evaluate the efficacy of the cleaning ability of two different rotary Ni-Ti systems; ProTaper Retreatment files and RaCe System compared to hand instrumentation with Hedstrom files for the removal of gutta-percha during retreatment. MATERIALS AND METHODS Thirty mandibular premolars with one single straight canal were decoronated and instrumented with ProTaper files and filled with thermoplastic gutta-percha. After 30 days, the samples were divided into three groups and gutta-percha was removed with the test instruments. The postoperative radiographs were evaluated with known criteria by dividing the root into cervical third, middle third, and apical third. The results were tabulated and Statistical Package for Social Sciences Software (IBM Corporation) was used for analysis. RESULTS The mean deviation of the results were first calculated and then t-test and analysis of variance test (two-tailed P value) were evaluated for establishing significant differences. The rotary instruments were effective in removing the gutta-percha from the canals. Therefore, significant difference was observed between the efficacies of the two rotary systems used. The rotary instruments showed effective gutta-percha removal in the cervical and middle one third. (P > 0.05). However, apical debridement was effective with Hedstrom files. CONCLUSION The study concluded the use of both rotary and hand instrumentation for effective removal of gutta-percha for retreatment.
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Affiliation(s)
- C S Preetam
- Department of Conservative Dentistry and Endodontics, Madha Dental College, Chennai, Tamil Nadu, India
| | - M Chandrashekhar
- Department of Conservative Dentistry and Endodontics, G. Pulla Reddy Dental College, Kurnool, India
| | - T Gunaranjan
- Department of Conservative Dentistry and Endodontics, Narayana Dental College, Nellore, Andhra Pradesh, India
| | - S Kishore Kumar
- Department of Conservative Dentistry and Endodontics, Adithya Dental College, Beed, Maharashtra, India
| | - S A Miskeen Sahib
- Department of Conservative Dentistry and Endodontics, Madha Dental College, Chennai, Tamil Nadu, India
| | - M Senthil Kumar
- Department of Conservative Dentistry and Endodontics, Madha Dental College, Chennai, Tamil Nadu, India
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Pawar AM, Thakur B, Metzger Z, Kfir A, Pawar M. The efficacy of the Self-Adjusting File versus WaveOne in removal of root filling residue that remains in oval canals after the use of ProTaper retreatment files: A cone-beam computed tomography study. J Conserv Dent 2016; 19:72-6. [PMID: 26957798 PMCID: PMC4760020 DOI: 10.4103/0972-0707.173204] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Aim: The current ex vivo study compared the efficacy of removing root fillings using ProTaper retreatment files followed by either WaveOne reciprocating file or the Self-Adjusting File (SAF). Materials and Methods: Forty maxillary canines with single oval root canal were selected and sectioned to obtain 18-mm root segments. The root canals were instrumented with WaveOne primary files, followed by obturation using warm lateral compaction, and the sealer was allowed to fully set. The teeth were then divided into two equal groups (N = 20). Initial removal of the bulk of root filling material was performed with ProTaper retreatment files, followed by either WaveOne files (Group 1) or SAF (Group 2). Endosolv R was used as a gutta-percha softener. Preoperative and postoperative high-resolution cone-beam computed tomography (CBCT) was used to measure the volume of the root filling residue that was left after the procedure. Statistical analysis was performed using t-test. Results: The mean volume of root filling residue in Group 1 was 9.4 (±0.5) mm3, whereas in Group 2 the residue volume was 2.6 (±0.4) mm3, (P < 0.001; t-test). Conclusions: When SAF was used after ProTaper retreatment files, significantly less root filling residue was left in the canals compared to when WaveOne was used.
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Affiliation(s)
- Ajinkya M Pawar
- Department of Conservative Dentistry and Endodontics, D Y Patil Dental School, Lohegaon, Pune, Maharashtra, India
| | - Bhagyashree Thakur
- Department of Dentistry, Sir HN Reliance Foundation Hospital, Mumbai, Maharashtra, India
| | - Zvi Metzger
- Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Anda Kfir
- Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Mansing Pawar
- Department of Conservative Dentistry and Endodontics, Government Dental College and Hospital, Mumbai, Maharashtra, India
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Marfisi K, Mercadé M, Plotino G, Clavel T, Duran-Sindreu F, Roig M. Efficacy of Reciproc(®) and Profile(®) Instruments in the Removal of Gutta-Percha from Straight and Curved Root Canals ex Vivo. EJOURNAL OF ORAL MAXILLOFACIAL RESEARCH 2015; 6:e1. [PMID: 26539283 PMCID: PMC4628489 DOI: 10.5037/jomr.2015.6301] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Accepted: 09/10/2015] [Indexed: 11/16/2022]
Abstract
Objectives To compare the efficacy of Reciproc® (VDW GmbH) and ProFile® (Dentsply Maillefer) instruments at removing gutta-percha from straight and curved root canals ex vivo filled using the cold lateral condensation and GuttaMaster® (VDW GmbH) techniques. Material and Methods Forty mesial roots of mandibular molars with two curved canals and 80 single-rooted teeth with straight root canals, a total of 160 root canals, were randomly assigned to eight groups (canals per group = 20) according to filling technique, retreatment instrument and root canal curvature as follows: Group I, cold lateral condensation/ProFile®/straight; Group II, cold lateral condensation/ProFile®/curved; Group III, cold lateral condensation/Reciproc®/straight; Group IV, cold lateral condensation/Reciproc®/curved; Group V, GuttaMaster®/ProFile®/straight; Group VI, GuttaMaster®/ProFile®/curved; Group VII, GuttaMaster®/Reciproc®/straight; and Group VIII, GuttaMaster®/Reciproc®/curved. The following data were recorded: procedural errors, retreatment duration and canal wall cleanliness. Means and standard deviations were calculated and analysed using the Kruskal-Wallis test, one-way analysis of variance and Tukey’s test (P < 0.05). Results Reciproc® instruments were significantly faster than ProFile® instruments at removing GuttaMaster® from both straight (P = 0.0001) and curved (P = 0.0003) root canals. Reciproc® were statistically more effective than ProFile® instruments in removing GuttaMaster® from straight root canals (P = 0.021). Regardless of filling technique or retreatment instrument, gutta-percha was removed more rapidly from curved than from straight root canals (P = 0.0001). Conclusions Neither system completely removed filling material from the root canals. Compared with ProFile® instruments, Reciproc® instruments removed GuttaMaster® filling material from straight and curved root canals more rapidly.
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Affiliation(s)
- Karem Marfisi
- Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona Spain
| | - Montserrat Mercadé
- Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona Spain
| | - Gianluca Plotino
- Department of Endodontics, "Sapienza" - University of Rome, Rome Italy
| | - Tatiana Clavel
- Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona Spain
| | - Fernando Duran-Sindreu
- Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona Spain
| | - Miguel Roig
- Department of Restorative Dentistry and Endodontics, Universitat Internacional de Catalunya, Sant Cugat del Vallès, Barcelona Spain
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27
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Can Sağlam B, Görgül G. Evaluation of surface alterations in different retreatment nickel-titanium files: AFM and SEM study. Microsc Res Tech 2015; 78:356-62. [PMID: 25736462 DOI: 10.1002/jemt.22481] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 02/10/2015] [Indexed: 11/10/2022]
Abstract
The aim of this study was to evaluate the surface changes of nickel titanium (Ni-Ti) rotary retreatment files after three and five uses. Furthermore, the effects of 2% sodium hypochlorite and chloroform solutions and sterilization procedures on the NiTi rotary retreatment surfaces were investigated. ProTaper Retreatment files, R-endo files, and Mtwo retreatment files were used for this study. The palatinal roots of maxillary molar teeth were obturated with gutta percha and Ah26. Retreatment procedures were performed with these retreatment file systems. The surface changes of untreated NiTi rotary files that were used three and five times, immersed in NaOCl and chloroform and subjected to sterilization procedures were investigated with atomic force microscopy (AFM) and scanning electron microscopy (SEM). The RMS values, three dimensional images and SEM images at various magnifications were obtained. RMS values showed that all three NiTi rotary retreatment file systems showed significant deteriorations after three and five uses. Cracks, damages and spiral construction deteriorations were detected in the SEM images after three and five uses. Furthermore, the Mtwo 15 file was broken off after five uses. AFM data indicated that 2% NaOCl caused significant surface deteriorations on NiTi rotary files and both AFM and SEM evaluation showed that chloroform solution and sterilization procedures did not cause significant surface deteriorations. In conclusion, ProTaper retreatment, R-endo, and Mtwo retreatment files showed surface damages depending on retreatment procedures. Clinicians have to consider that retreatment files always have a tendency to break off after the third time they have been used.
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Affiliation(s)
- Baran Can Sağlam
- Department of Endodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey
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28
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Kok D, Da Rosa RA, Barreto MS, Busanello FH, Santini MF, Pereira JR, Só MVR. Penetrability of AH plus and MTA fillapex after endodontic treatment and retreatment: A confocal laser scanning microscopy study. Microsc Res Tech 2014; 77:467-71. [DOI: 10.1002/jemt.22371] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/31/2014] [Accepted: 04/04/2014] [Indexed: 11/10/2022]
Affiliation(s)
| | - Ricardo Abreu Da Rosa
- Conservative Dentistry Department; Federal University of Rio Grande do Sul; Porto Alegre RS Brazil
| | | | | | - Manuela Favarin Santini
- Conservative Dentistry Department; Federal University of Rio Grande do Sul; Porto Alegre RS Brazil
| | | | - Marcus ViníCius Reis Só
- Conservative Dentistry Department; Federal University of Rio Grande do Sul; Porto Alegre RS Brazil
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29
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Capar ID, Arslan H, Ertas H, Gök T, Saygılı G. Effectiveness of ProTaper Universal retreatment instruments used with rotary or reciprocating adaptive motion in the removal of root canal filling material. Int Endod J 2014; 48:79-83. [DOI: 10.1111/iej.12279] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2013] [Accepted: 03/10/2014] [Indexed: 11/29/2022]
Affiliation(s)
- I. D. Capar
- Department of Endodontics; Faculty of Dentistry; İzmir Katip Çelebi University; İzmir Turkey
| | - H. Arslan
- Department of Endodontics; Faculty of Dentistry; Atatürk University; Erzurum Turkey
| | - H. Ertas
- Department of Endodontics; Faculty of Dentistry; İzmir Katip Çelebi University; İzmir Turkey
| | - T. Gök
- Department of Endodontics; Faculty of Dentistry; İzmir Katip Çelebi University; İzmir Turkey
| | - G. Saygılı
- Department of Endodontics; Faculty of Dentistry; İzmir Katip Çelebi University; İzmir Turkey
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30
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Mittal N, Jain J. Spiral computed tomography assessment of the efficacy of different rotary versus hand retreatment system. J Conserv Dent 2014; 17:8-12. [PMID: 24554852 PMCID: PMC3915393 DOI: 10.4103/0972-0707.124089] [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: 04/21/2013] [Revised: 08/13/2013] [Accepted: 10/09/2013] [Indexed: 11/04/2022] Open
Abstract
AIMS The purpose of this study was to evaluate the efficacy of nickel-titanium rotary retreatment systems versus stainless steel hand retreatment system with or without solvent for gutta-percha removal during retreatment. MATERIALS AND METHODS Sixty extracted human mandibular molar teeth with single canal in a distal root was prepared with ProTaper rotary nickel-titanium files and obturated with gutta-percha and sealer. The teeth were randomly divided into six groups of 10 specimens in each groups. The volume of filling material before and after retreatment were evaluated in cm(3) using the computed tomography (CT) scanner proprietary software. RESULTS Maximum amount of filling material removed during retreatment with ProTaper retreatment system with solvent and minimum with hand retreatment system with solvent. CONCLUSIONS None of the technique was 100% effective in removing the filling materials, but the ProTaper retreatment system with solvent was better.
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Affiliation(s)
- Neelam Mittal
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Jyoti Jain
- Conservative Dentistry and Endodontics, Faculty of Dental Sciences, Institute of Medical Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
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31
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Rödig T, Reicherts P, Konietschke F, Dullin C, Hahn W, Hülsmann M. Efficacy of reciprocating and rotary NiTi instruments for retreatment of curved root canals assessed by micro-CT. Int Endod J 2014; 47:942-8. [DOI: 10.1111/iej.12239] [Citation(s) in RCA: 73] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2013] [Accepted: 01/01/2014] [Indexed: 11/27/2022]
Affiliation(s)
- T. Rödig
- Department of Preventive Dentistry Periodontology and Cariology; University Medical Center; Göttingen Germany
| | - P. Reicherts
- Department of Preventive Dentistry Periodontology and Cariology; University Medical Center; Göttingen Germany
| | - F. Konietschke
- Department of Medical Statistics; University Medical Center; Göttingen Germany
| | - C. Dullin
- Department of Diagnostic and Interventional Radiology; University Medical Center; Göttingen Germany
| | - W. Hahn
- Private Dental Practice; Göttingen Germany
| | - M. Hülsmann
- Department of Preventive Dentistry Periodontology and Cariology; University Medical Center; Göttingen Germany
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KELEŞ A, ŞIMŞEK N, ALÇIN H, AHMETOGLU F, YOLOGLU S. Retreatment of flat-oval root canals with a self-adjusting file: An SEM study. Dent Mater J 2014; 33:786-91. [DOI: 10.4012/dmj.2014-054] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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33
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Vale MSD, Moreno MDS, Silva PMFD, Botelho TCF. Endodontic filling removal procedure: an ex vivo comparative study between two rotary techniques. Braz Oral Res 2013; 27:478-83. [DOI: 10.1590/s1806-83242013000600006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Accepted: 07/31/2013] [Indexed: 11/21/2022] Open
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34
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Metzger Z, Solomonov M, Kfir A. The role of mechanical instrumentation in the cleaning of root canals. ACTA ACUST UNITED AC 2013. [DOI: 10.1111/etp.12048] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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35
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Sağlam BC, Koçak MM, Türker SA, Koçak S. Efficacy of different solvents in removing gutta-percha from curved root canals: a micro-computed tomography study. AUST ENDOD J 2013; 40:76-80. [PMID: 24118310 DOI: 10.1111/aej.12041] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The aim of this study was to compare the root filling material that remained after retreatment of curved root canals with chloroform and Endosolv R as solvents. The evaluation employed micro-computed tomography (CT) imaging. Thirty-six extracted molar teeth with curved roots were selected. After preparation with ProTaper rotary instruments, the canals were filled with gutta-percha and AH26 sealer. The teeth were randomly divided into three groups according to solvent used (n = 12) as follows: group 1: chloroform; group 2: Endosolv R; group 3: no solvent (negative control). ProTaper Universal Retreatment files were used to remove each root canal filling and then the self-adjusting file was applied for two minutes. Preoperative and postoperative micro-CT images were used to assess the percentage of residual filling material. The mean percentage of residual filling material was quantified. There were no statistically significant differences between the groups in terms of percentage volume of residual root canal filling.
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Affiliation(s)
- Baran Can Sağlam
- Department of Endodontics, Faculty of Dentistry, Bülent Ecevit University, Zonguldak, Turkey
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Comment on "Evaluation of Manual and Two-Rotary NiTi Retreatment Systems in Removing Gutta-Percha Obturated with Two Root Canal Sealers". ISRN DENTISTRY 2013; 2013:694027. [PMID: 23781344 PMCID: PMC3678458 DOI: 10.1155/2013/694027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 04/26/2013] [Indexed: 11/17/2022]
Abstract
Proper research design, appropriate evaluation and measurement methods, use of correct statistical tests, interpretation, and inference are the essentials without which any scientific research reporting is incomplete and does not serve its proposed purpose. In this communication, some common flaws in research designing, evaluation, analysis, and inference have been explained using a published article as a reference. The purpose of the paper is to help the scientific community recognize the significance of proper research designing and planning in order to achieve the results which are worthwhile.
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Rödig T, Kupis J, Konietschke F, Dullin C, Drebenstedt S, Hülsmann M. Comparison of hand and rotary instrumentation for removing gutta-percha from previously treated curved root canals: a microcomputed tomography study. Int Endod J 2013; 47:173-82. [PMID: 23701239 DOI: 10.1111/iej.12128] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 04/17/2013] [Indexed: 12/25/2022]
Abstract
AIM To compare the efficacy of hand and rotary nickel-titanium (NiTi) instruments in removing filling material from curved root canals of root filled teeth with unknown preparation parameters. METHODOLOGY Ninety mandibular molars with root fillings in curved root canals and homogenous root canal filling extending to 0-2 mm short of the radiographic apex were selected. Root canal curvatures and radii were measured in two directions and microcomputed tomography (micro-CT) scans were used to determine preoperative volumes of the filling material. Subsequently, the teeth were assigned to two identical groups (n = 14). The root fillings were removed with Hedström files or FlexMaster NiTi rotary instruments. Postoperative micro-CT imaging was used to assess the percentage of residual filling material as well as the amount of dentine removal. Working time and procedural errors were recorded. Data were compared using analysis of covariance and analysis of variance procedures. RESULTS Root canals retreated with Hedström files were associated with less remaining filling material compared with FlexMaster instruments (P < 0.05). Both retreatment techniques removed similar amounts of dentine with no significant differences (P > 0.05). FlexMaster instruments were significantly faster than Hedström files (P < 0.05). No procedural errors were detected in the Hedström group, whilst three instruments fractured in the FlexMaster group. CONCLUSIONS Hand instrumentation resulted in significantly less residual filling material than retreatment with rotary NiTi instruments. Dentine removal was not significantly different for both techniques. FlexMaster NiTi rotary files were significantly faster than Hedström files, but were associated with a higher risk of instrument fracture.
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Affiliation(s)
- T Rödig
- Department for Preventive Dentistry, Periodontology and Cariology, University of Göttingen, Göttingen, Germany
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Shivanand S, Patil CR, Thangala V, Kumar PR, Sachdeva J, Krishna A. To evaluate and compare the efficacy, cleaning ability of hand and two rotary systems in root canal retreatment. J Contemp Dent Pract 2013; 14:440-4. [PMID: 24171986 DOI: 10.5005/jp-journals-10024-1341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
AIM To evaluate and compare the efficacy, cleaning ability of hand and two rotary systems in root canal retreatment. METHODOLOGY Sixty extracted premolars were retreated with following systems: Group -ProTaper Universal retreatment files, Group 2-ProFile system, Group 3-H-file. Specimens were split longitudinally and amount of remaining gutta-percha on the canal walls was assessed using direct visual scoring with the aid of stereomicroscope. Results were statistically analyzed using ANOVA test. RESULTS Completely clean root canal walls were not achieved with any of the techniques investigated. However, all three systems proved to be effective for gutta-percha removal. Significant difference was found between ProTaper universal retreatment file and H-file, and also between ProFile and H-file. CONCLUSION Under the conditions of the present study, ProTaper Universal retreatment files left significantly less guttapercha and sealer than ProFile and H-file. CLINICAL SIGNIFICANCE Rotary systems in combination with gutta-percha solvents can perform superiorly as compared to the time tested traditional hand instrumentation in root canal retreatment.
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Affiliation(s)
- Sunita Shivanand
- Lecturer, Department of Conservative Dentistry and Endodontics KLEs VK Institute of Dental Sciences, Belgaum, Karnataka, India
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39
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Beasley RT, Williamson AE, Justman BC, Qian F. Time Required to Remove GuttaCore, Thermafil Plus, and Thermoplasticized Gutta-percha from Moderately Curved Root Canals with ProTaper Files. J Endod 2013; 39:125-8. [DOI: 10.1016/j.joen.2012.10.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2012] [Revised: 10/02/2012] [Accepted: 10/08/2012] [Indexed: 10/27/2022]
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40
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Yadav P, Bharath MJ, Sahadev CK, Makonahalli Ramachandra PK, Rao Y, Ali A, Mohamed S. An in vitro CT Comparison of Gutta-Percha Removal with Two Rotary Systems and Hedstrom Files. IRANIAN ENDODONTIC JOURNAL 2013; 8:59-64. [PMID: 23717331 PMCID: PMC3662038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2012] [Revised: 01/23/2013] [Accepted: 02/10/2013] [Indexed: 11/24/2022]
Abstract
INTRODUCTION To evaluate the efficacy of NiTi mechanical rotary instrumentation and Hedstrom file for gutta-percha/sealer removal computed tomography (CT) was utilized in vitro. MATERIALS AND METHODS Thirty extracted human single rooted teeth, each with a single canal were selected. The samples were decoronated with a double faced diamond disk to have 17-mm root; teeth roots were instrumented with K-files up to master apical file #30 using step back technique. Samples were obturated using cold lateral condensation of gutta-percha and AH Plus root canal sealer. The teeth were then randomly divided into three groups of 10 specimens each. After 2 weeks 3-dimensional images of the roots were obtained by CT and the volume of root filling mass was measured. All the canals were then retreated by either the ProTaper retreatment files, Mtwo retreatment files or Hedstrom files. The canals were irrigated with 2 mL of 2.5% sodium hypochlorite irrigating solution during each change of instrument. The volume of remaining filling materials after the retreatment procedures was assessed by CT. Statistical analysis was performed with one-way ANOVA and Tukey's post hoc test. RESULTS Neither of studied systems completely removed the root filling material. No significant difference was observed between the rotary systems. The volume of remaining filling materials was significantly less in rotary instrumentation than hand files. There was no significant difference for debris extruded from the apical foramen between the groups. CONCLUSION Under the experimental conditions, Mtwo and ProTaper retreatment files left less gutta-percha and sealer than H files; however, complete removal of filling materials was not achieved by the three systems investigated.
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Affiliation(s)
- Pankaj Yadav
- Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India ,Corresponding author: Pankaj Yadav, Department of Conservative Dentistry and Endodontics, Maulana Azad Institute of Dental Sciences, New Delhi, India. Tel: +91-9313545604, Fax: +91-91123217081,
| | - Makonahalli Jaganath Bharath
- Department of Conservative Dentistry and Endodontics, Sri Hasanamba Dental College and Hospital, Vidyanagar, Hassan, Karnataka, India
| | | | | | - Yogesh Rao
- Department of Prosthodontics, Maharana Pratap College of Dentistry and Research Centre, India
| | - Ambereen Ali
- Department of Conservative Dentistry and Endodontics, Sri Hasanamba Dental College and Hospital, Vidyanagar, Hassan, Karnataka, India
| | - Shahnawaz Mohamed
- Department of Conservative Dentistry and Endodontics, Sri Hasanamba Dental College and Hospital, Vidyanagar, Hassan, Karnataka, India
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Rechenberg DK, Paqué F. Impact of cross-sectional root canal shape on filled canal volume and remaining root filling material after retreatment. Int Endod J 2012. [DOI: 10.1111/iej.12027] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- D.-K. Rechenberg
- Department of Preventive Dentistry, Periodontology, and Cariology; University of Zürich Center of Dental Medicine; Zürich; Switzerland
| | - F. Paqué
- Department of Preventive Dentistry, Periodontology, and Cariology; University of Zürich Center of Dental Medicine; Zürich; Switzerland
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Ma J, Al-Ashaw AJ, Shen Y, Gao Y, Yang Y, Zhang C, Haapasalo M. Efficacy of ProTaper Universal Rotary Retreatment System for Gutta-percha Removal from Oval Root Canals: A Micro–Computed Tomography Study. J Endod 2012; 38:1516-20. [DOI: 10.1016/j.joen.2012.08.001] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 08/01/2012] [Accepted: 08/02/2012] [Indexed: 10/27/2022]
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Chauhan R, Tikku A, Chandra A. Detection of residual obturation material after root canal retreatment with three different techniques using a dental operating microscope and a stereomicroscope: An in vitro comparative evaluation. J Conserv Dent 2012; 15:218-22. [PMID: 22876005 PMCID: PMC3410328 DOI: 10.4103/0972-0707.97940] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 12/06/2011] [Accepted: 12/29/2011] [Indexed: 11/23/2022] Open
Abstract
Aim: The study was designed to compare the efficiency of three different methods used for retreatment using a dental operating microscope (DOM) and a stereomicroscope and to evaluate and compare the two methods for detection of residual obturation material after retreatment. Background: The DOM can play an important role in the successful retreatment by detecting the remaining obturation material. Materials and Methods: Thirty extracted maxillary central incisors were collected and obturated after biomechanical preparation. The samples were divided into three groups depending on the method of retreatment: Group I, H-files; Group II, ProTaper Universal retreatment files; and Group III: H-files + Gates-Glidden drills, with 10 samples in each group. After retreatment, the samples were observed under a DOM for detection of residual obturation material. Later, the teeth were cleared and observed under a stereomicroscope for detecting the remaining filling material. The results were subjected to the Spearman's rank order test and other statistical analysis. Results: The maximum cleanliness of the root canal walls was seen in Group I while Group II showed the least. The difference between the mean scores obtained with a DOM and a stereomicroscope was statistically significant (P = 0.05). Conclusion: None of the techniques could completely remove the obturation material. The root canal cleanliness is best achieved when retreatment is performed under a DOM.
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Affiliation(s)
- Raju Chauhan
- Department of Conservative Dentistry and Endodontics, Institute of Dental Sciences, Pilibhit Bypass Road, Bareilly, India
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44
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Jayasenthil A, Sathish ES, Prakash P. Evaluation of manual and two-rotary niti retreatment systems in removing gutta-percha obturated with two root canal sealers. ISRN DENTISTRY 2012; 2012:208241. [PMID: 22997586 PMCID: PMC3444841 DOI: 10.5402/2012/208241] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Accepted: 08/01/2012] [Indexed: 11/23/2022]
Abstract
Objective. The objective of this study was to evaluate the efficacy of two retreatment NiTi systems (protaper universal retreatment files, R-Endo), when compared to manual technique in removing Gutta-percha obturated with two sealers. Study Design. Sixty extracted single-rooted premolars were instrumented with Protaper rotary files till F3. The specimens were divided into six groups. Groups 1, 2, 3 were obturated with Gutta-percha and zinc oxide eugenol and Groups 4, 5, 6 were obturated with Gutta-percha and AH-plus. The retreatment was carried out in groups 1 and 4 with H-files and GGdrills, groups 2 and 5 with R-endo retreatment files and groups 3 and 6 with Protaper retreatment files. The roots were sectioned and evaluated under optical stereomicroscope. Statistical analysis was performed with one-way ANOVA and Newman-Keul's test at P < 0.05. Results. The manual technique resulted in cleaner canal walls when compared with both rotary retreatment systems. Conclusion. NiTi rotary retreatment files can be used to remove the filling material quickly, but it should be followed by hand instruments to obtain better canal wall cleanliness.
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Affiliation(s)
- Athikesavan Jayasenthil
- Department of Conservative Dentistry and Endodontics, Tagore Dental College and Hospital, Rathinamangalam, Vandalur, Chennai 600048, India
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45
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Akpınar KE, Altunbaş D, Kuştarcı A. The efficacy of two rotary NiTi instruments and H-files to remove gutta-percha from root canals. Med Oral Patol Oral Cir Bucal 2012; 17:e506-11. [PMID: 22143729 PMCID: PMC3476094 DOI: 10.4317/medoral.17582] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2011] [Accepted: 05/06/2011] [Indexed: 11/27/2022] Open
Abstract
Objective: The aim of this study was to evaluate the efficacy of R-Endo® and K3® rotary nickel-titanium instruments compared with manual instrumentation with H-files, with use of a solvent, for removal of gutta-percha during retreatment.
Study design: Forty five freshly extracted human single-rooted teeth, each with one root canal, were instrumented with K-files and filled using cold lateral compaction of gutta-percha and AH 26® sealer. The teeth were randomly divided into three groups of 15 specimens each. Removal of gutta-percha was performed with the following devices and techniques: Group 1 (H-files), Group 2 (R-Endo®), and Group 3 (K3®). The specimens were rendered transparent for the evaluation of the area of remaining gutta-percha/sealer in buccolingual and mesiodistal directions. Statistical analysis as performed by using one-way ANOVA and Kruskal-Wallis tests (p=0.05).
Results: All retreatment techniques used in this study left some filling material inside the root canal. Images in buccolingual and mesiodistal directions showed no significant differences between the groups (p>0.05).
Conclusions: Under the experimental conditions, the remaining filling material after retreatment was similar for each group.
Key words:Gutta-percha removal, K3®, NiTi, R-Endo®.
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Affiliation(s)
- Kerem-Engin Akpınar
- Department of Endodontics, Faculty of Dentistry, Cumhuriyet University, Sivas, Turkey
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Marques da Silva B, Baratto-Filho F, Leonardi DP, Henrique Borges A, Volpato L, Branco Barletta F. Effectiveness of ProTaper, D-RaCe, and Mtwo retreatment files with and without supplementary instruments in the removal of root canal filling material. Int Endod J 2012; 45:927-32. [DOI: 10.1111/j.1365-2591.2012.02051.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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47
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Xu LL, Zhang L, Zhou XD, Wang R, Deng YH, Huang DM. Residual Filling Material in Dentinal Tubules after Gutta-percha Removal Observed with Scanning Electron Microscopy. J Endod 2012; 38:293-6. [DOI: 10.1016/j.joen.2011.11.016] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2011] [Revised: 11/24/2011] [Accepted: 11/27/2011] [Indexed: 10/14/2022]
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Rödig T, Hausdörfer T, Konietschke F, Dullin C, Hahn W, Hülsmann M. Efficacy of D-RaCe and ProTaper Universal Retreatment NiTi instruments and hand files in removing gutta-percha from curved root canals - a micro-computed tomography study. Int Endod J 2012; 45:580-9. [PMID: 22264204 DOI: 10.1111/j.1365-2591.2012.02014.x] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
AIM To compare the efficacy of two rotary NiTi retreatment systems and Hedström files in removing filling material from curved root canals. METHODOLOGY Curved root canals of 57 extracted teeth were prepared using FlexMaster instruments and filled with gutta-percha and AH Plus. After determination of root canal curvatures and radii in two directions, the teeth were assigned to three identical groups (n = 19). The root fillings were removed with D-RaCe instruments, ProTaper Universal Retreatment instruments or Hedström files. Pre- and postoperative micro-CT imaging was used to assess the percentage of residual filling material as well as the amount of dentine removal. Working time and procedural errors were recorded. Data were analysed using analysis of covariance and analysis of variance procedures. RESULTS D-RaCe instruments were significantly more effective than ProTaper Universal Retreatment instruments and Hedström files (P < 0.05). Hedström files removed significantly less dentine than the rotary NiTi systems (P < 0.0001). D-RaCe instruments were significantly faster compared to both other groups (P < 0.05). No procedural errors such as instrument fracture, blockage, ledging or perforation were detected in the Hedström group. In the ProTaper group, four instrument fractures and one lateral perforation were observed. Five instrument fractures were recorded for D-RaCe. CONCLUSIONS D-RaCe instruments were associated with significantly less residual filling material than ProTaper Universal Retreatment instruments and hand files. Hedström files removed significantly less dentine than both rotary NiTi systems. Retreatment with rotary NiTi systems resulted in a high incidence of procedural errors.
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Affiliation(s)
- T Rödig
- Department of Preventive Dentistry, Periodontology and Cariology, University of Göttingen, Göttingen Centre for Statistics, University of Göttingen, Germany.
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Yilmaz Z, Karapinar SP, Ozcelik B. Efficacy of rotary Ni-Ti retreatment systems in root canals filled with a new warm vertical compaction technique. Dent Mater J 2011; 30:948-53. [PMID: 22123022 DOI: 10.4012/dmj.2011-123] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The aim of this study was to compare the efficacy of Mtwo, ProTaper retreatment files and Hedström files for the retreatment of root canals filled with BeeFill 2 in1 and cold lateral compaction techniques. 63 single-rooted human teeth were prepared with Mtwo rotary files to size 35/.04 and assigned into three groups (n=21/group). (1) BeeFill 2 in1/2Seal, (2) BeeFill 2 in1/AH26 and (3) laterally-compacted gutta-percha/AH26. The specimens were subgrouped according to the file system used to remove root fillings (n=7/subgroup): 1. Mtwo retreatment file, 2. ProTaper retreatment file, 3. Hedström file. Roots were split longitudinally and photographed. The time required for removal of root canal fillings and the areas of residual root filling materials were compared statistically (p<0.05). The maximum amount of remnant was observed in the Mtwo group for removal of BeeFill 2 in1/AH26. ProTaper retreatment files required less time to remove root filling material than Mtwo retreatment files and Hedström files (p<0.05). Among the tested removal systems, ProTaper retreatment files may offer the best efficiency-speed combination.
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Affiliation(s)
- Zeliha Yilmaz
- Department of Endodontics, Faculty of Dentistry, Hacettepe University
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50
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Removal of gutta-percha/zinc-oxide-eugenol sealer or gutta-percha/epoxy resin sealer from severely curved canals: an in vitro study. Int J Dent 2011; 2011:541831. [PMID: 22145001 PMCID: PMC3227471 DOI: 10.1155/2011/541831] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2011] [Revised: 08/25/2011] [Accepted: 08/25/2011] [Indexed: 11/17/2022] Open
Abstract
The aim of this study was to compare the cleanliness of root canal walls after retreatment using two rotary retreatment files to hand instruments in severely curved canals obturated with gutta-percha and two different sealers. Single rooted mandibular premolars (n = 90) with root curvatures were instrumented and obturated with gutta-percha and an epoxy resin (Group 1, n = 45) or zinc oxide eugenol sealer (Group 2, n = 45). Following retreatment of the specimens (n = 15 ProTaper Universal Retreatment Files (Subgroup B) or R-Endo retreatment files (Subgroup C) after 1 month, split specimens were examined under a stereomicroscope and the percentage of remaining root filling material was statistically compared using one way ANOVA with Bonferroni adjustment for multiple comparisons (P = 0.05). The R-Endo system performed significantly better than the other two file systems (P < 0.05). None of the systems used in this study cleaned root canals thoroughly. The R-Endo system did provide cleaner walls when compared to the other instruments used. The type of root filling materials had an impact on the outcomes with all techniques.
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