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Inada RNH, Silva ECA, Lopes CS, Queiroz MB, Torres FFE, da Silva GF, Cerri PS, Guerreiro-Tanomaru JM, Tanomaru-Filho M. Biocompatibility, bioactivity, porosity, and sealer/dentin interface of bioceramic ready-to-use sealers using a dentin-tube model. Sci Rep 2024; 14:16768. [PMID: 39039132 PMCID: PMC11263578 DOI: 10.1038/s41598-024-66616-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 07/02/2024] [Indexed: 07/24/2024] Open
Abstract
This study evaluated the biocompatibility, bioactivity, porosity, and sealer/dentin interface of Sealer Plus BC (SP), Bio-C Sealer (BIOC), TotalFill BC Sealer (TF), and AH Plus (AHP). Dentin tubes filled with the sealers and empty tubes (control group) were implanted in the subcutaneous tissue of rats for different periods (n = 6 per group/period). Number of inflammatory cells (ICs), capsule thickness, von Kossa reaction, interleukin-6 (IL-6) and osteocalcin (OCN) were evaluated. Porosity and voids in the interface dentin/sealers were assessed by micro-computed tomography. The data were submitted to ANOVA/Tukey's tests (α = 0.05). Greater capsule thickness, ICs and IL-6 immunolabeling cells were observed in AHP. No significant difference in thickness of capsule, ICs, and IL-6- immunolabeling cells was detected between SP and TF, in all periods, and after 30 and 60 days between all groups. At 60 days all groups had reduction in capsule thickness, ICs and IL-6 immunolabeling cells. Von Kossa-positive and birefringent structures were observed in the capsules around the sealers. BIOC, SP, and TF exhibited OCN-immunolabeling cells. All sealers had porosity values below 5%, besides low and similar interface voids. BIOC, SP and TF are biocompatible, bioactive, and have low porosity and voids. The dentin-tube model used is an alternative for evaluating bioceramic materials.
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Affiliation(s)
- Rafaela Nanami Handa Inada
- School of Dentistry, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil
| | - Evelin Carine Alves Silva
- School of Dentistry, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil
| | - Camila Soares Lopes
- School of Dentistry, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil
| | - Marcela Borsatto Queiroz
- School of Dentistry, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil
| | | | | | - Paulo Sérgio Cerri
- Laboratory of Histology and Embryology, Department of Morphology, Genetics, Orthodontics and Pediatric Dentistry, School of Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil
| | | | - Mário Tanomaru-Filho
- School of Dentistry, Department of Restorative Dentistry, São Paulo State University (UNESP), Araraquara, 14801‑903, Brazil.
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Buyuksungur A, Oncu A, Koohnavard M, Celikten B, Tezer EO, Huang Y, Orhan K. Micro-Computed Tomography Analysis of Resin and Calcium Silicate Based Sealers Removal in Mandibular Molars Curved Canals. Acta Stomatol Croat 2024; 58:134-144. [PMID: 39036324 PMCID: PMC11256872 DOI: 10.15644/asc58/2/3] [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: 12/08/2023] [Accepted: 03/13/2024] [Indexed: 07/23/2024] Open
Abstract
Objective The removal of the root canal sealer is an important factor in nonsurgical retreatment. The aim of this study was to compare the removal of AH Plus, Well Root ST, and AH Plus Bioceramic Sealer using Protaper Universal retreatment files. Methods The curved mesio-buccal canals of extracted mandibular molars were prepared with the Protaper Gold file system (up to F2). Specimens were randomly divided into 3 groups and filled with the single cone technique using AH Plus, Well-Root ST, and AH Plus Bioceramic Sealer, respectively. After two weeks, the root canal filling of all specimens was removed using Protaper Universal retreatment files. All specimens were scanned using micro-CT. The remaining volume of the root canal filling was recorded in total and the coronal, middle, and apical third of each specimen. Results Well-Root ST and AH Plus Bioceramic Sealer groups had a higher percentage of total remaining filling material than the AH Plus group (P<0.05). Conclusion This study has shown that the volume of remaining root canal filling was significantly higher in the samples filled with calcium silicate-based sealers.
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Affiliation(s)
- Arda Buyuksungur
- Ankara University, Faculty of Dentistry, Basic Medical Sciences, Ankara, Turkey
| | - Aysenur Oncu
- Lokman Hekim University, Faculty of Dentistry, Department of Endodontics, Ankara, Turkey
| | - Mehrdad Koohnavard
- Lokman Hekim University, Faculty of Dentistry, Department of Endodontics, Ankara, Turkey
| | - Berkan Celikten
- Ankara University, Faculty of Dentistry, Department of Endodontics, Ankara, Turkey
| | - Emine Odabasi Tezer
- Ankara University, Faculty of Dentistry, Department of Endodontics, Ankara, Turkey
| | - Yan Huang
- Department of Oral Health, KULeuven, Belgium
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, China
| | - Kaan Orhan
- Ankara University, Faculty of Dentistry, Department of DentoMaxillofacial Radiology, Ankara, Turkey
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Lucisano MP, Ramos GT, Blanco-Victorio DJ, Ramírez-Sotelo LR, Lima RB, Nelson-Filho P, da Silva RAB, Miranda JA, da Silva LAB. Root canal conicity determination of primary second molars using nanotomography: An in vitro study. Int J Paediatr Dent 2024. [PMID: 38676283 DOI: 10.1111/ipd.13198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 04/06/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024]
Abstract
BACKGROUND The conicity of the root canals of primary teeth is an important measure for endodontic therapies. However, determining this conicity depends on the methods employed, which requires further investigation. AIM The aim of this study was to determine the conicity of the root canals of the upper and lower primary second molars using nanotomography (nCT). DESIGN An in vitro study was performed using nine primary second molars, both upper and lower, subjected to nCT. Comparisons between the diameters of root canals were performed between the thirds (cervical-D0, middle-D5, and apical-D7). The conicity (%) was determined for each root canal from cervical to apical. Data were statistically analyzed with a significance level of 5%. RESULTS The conicity ranged from 2% to 8% for the upper primary second molars. Significant differences in root canal diameter between the thirds (D0, D5, and D7 points) were observed in the mesio- and distobuccal roots (p < .05), but not in the palatal roots (p > .05). For the lower primary second molars, the conicity ranged from 2% to 17%, as well as significant differences in root canal diameter between the thirds (D0, D5, and D7 points) were observed in all roots (distal, mesiobuccal, and mesiolingual; p < .05). CONCLUSION The conicity of the upper primary second molars was different from that of the lower ones, which showed a greater variability.
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Affiliation(s)
- Marília Pacífico Lucisano
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Gilmer Torres Ramos
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
- Departamento de Odontopediatría, Facultad de Odontología, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | | | - Laura Ricardina Ramírez-Sotelo
- Departamento de Estomatología Médico Quirúrgico, Facultad de Odontologia, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Ricardo Barbosa Lima
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Paulo Nelson-Filho
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Raquel Assed Bezerra da Silva
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
| | - Jessica Arieta Miranda
- Departamento de Odontopediatría, Facultad de Odontología, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Léa Assed Bezerra da Silva
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil
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Chen Z, Chen N, Yang Y, Fan W. Micro-computed tomographic evaluation on the quality of single-cone obturation using a modified passive-deflation sealer injection needle: an in vitro study. BMC Oral Health 2024; 24:476. [PMID: 38643094 PMCID: PMC11031986 DOI: 10.1186/s12903-024-04232-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 04/05/2024] [Indexed: 04/22/2024] Open
Abstract
OBJECTIVES This study aimed to design a modified passive-deflation sealer injection needle and investigate its ability to improve obturation quality of single-cone technique through assessing the distribution of voids in root canals using micro-computed tomography (micro-CT). MATERIALS AND METHODS Forty-eight mandibular incisors were divided into eight groups (n = 6), according to the taper of root canal preparation (0.06 or 0.04), the needle used for sealer injection (modified or commercial iRoot SP injection needle), and the obturation method (iRoot SP sealer-only or single-cone obturation). After obturation, each specimen was scanned by micro-CT. The volumetric percentage and distribution of all voids were first analyzed and compared among groups, then the open and closed voids were separately analyzed and compared among single-cone obturation groups. RESULTS Compared to commercial needle groups, modified needle groups showed much less voids, especially in the apical root canal part (P < 0.05). Besides, the modified needle groups produced much less open voids than commercial needle groups despite the root canal taper (P < 0.05). CONCLUSIONS The modified passive deflation sealer injection needle could effectively improve the quality of single-cone obturation through reducing intra-canal voids, especially open voids throughout the root canal, thus might possibly be developed as an effective intra-canal sealer delivering instrument.
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Affiliation(s)
- Zhuo Chen
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Nuo Chen
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Yanling Yang
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China
| | - Wei Fan
- State Key Laboratory of Oral & Maxillofacial Reconstruction and Regeneration, Key Laboratory of Oral Biomedicine Ministry of Education, Hubei Key Laboratory of Stomatology, School & Hospital of Stomatology, Wuhan University, Wuhan, People's Republic of China.
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Molina MAV, Silva GO, Candemil AP, Camargo RVD, Pauwels R, Jacobs R, Sousa-Neto MD, Mazzi-Chaves JF. Evaluation of 2- and 3-dimensional anatomic parameters of C-shaped root canals with cone beam computed tomography, microcomputed tomography, and nanocomputed tomography. Oral Surg Oral Med Oral Pathol Oral Radiol 2023; 136:759-768. [PMID: 37580223 DOI: 10.1016/j.oooo.2023.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Revised: 06/29/2023] [Accepted: 07/04/2023] [Indexed: 08/16/2023]
Abstract
OBJECTIVE The objective of this study was to evaluate 2-dimensional (2D) and 3D morphometric parameters of C-shaped root canals on cone beam computed tomography (CBCT) and microcomputed tomography (microCT) images using nanocomputed tomography (nanoCT) as the reference standard. STUDY DESIGN Sixty mandibular molars with C-shaped canals were individually scanned using nanoCT and microCT. Cone beam computed tomography acquisitions were then performed with 4 CBCT systems, using high and standard resolutions. The 2D parameters of roundness and major and minor diameters were obtained in the cross sections of the root canals at 1, 2, and 3 mm from the root apex. The 3D parameters of surface area, volume, and structure model index were measured considering the entire extension of the root canals. Absolute error (AE) in measurement was calculated against the nanoCT values. Data were statistically analyzed with the Shapiro-Wilk test and analysis of variance (α = 0.05). RESULTS No significant differences in AE were discovered for the 2D parameters among microCT and the CBCT scans. The AE values for the 3D parameters of volume and surface area were significantly smaller in microCT compared to all CBCT units (P < .05). Significantly lower AE values for surface area were observed in high resolution compared to standard resolution for all CBCT units (P < .05). Structure model index did not differ significantly among microCT and all CBCT protocols. CONCLUSIONS Cone beam computed tomography images showed accuracy for evaluating 2D parameters and over- and underestimation for 3D parameters.
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Affiliation(s)
- Miguel Angel Ventura Molina
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil
| | - Giovane Oliveira Silva
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil
| | - Amanda Pelegrin Candemil
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil
| | - Rafael Verardino de Camargo
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil
| | - Ruben Pauwels
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand; Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil
| | - Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Sao Paulo, Brazil.
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Anton Y Otero CI, Liaudet N, di Bella E, Abdelaziz M, Feilzer A, Krejci I, Marger L. Evaluating the use of self-conditioning adhesive combined with dual curing resin cement as an endodontic sealer: An in vitro study. Biomater Investig Dent 2023; 10:2282523. [PMID: 38979096 PMCID: PMC11229672 DOI: 10.1080/26415275.2023.2282523] [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: 07/22/2023] [Accepted: 11/07/2023] [Indexed: 07/10/2024] Open
Abstract
Objectives To compare infiltration, sealing and microleakage in root dentin with a self-conditioning adhesive system combined with dual curing resin (resin-based cement) to a conventional epoxy-resin-based sealer using confocal microscopy imaging. Methods 26 roots were enlarged and disinfected. Dentin tubules of 24 teeth were labelled with a red fluorophore (Rhodamine B) (two samples served as controls). Root canal samples were sealed in group AH (n = 11) with a conventional sealer (AH Plus Root Canal Sealer, Dentsply DeTrey) and in group RC (n = 11) with a resin-based cement (Parabond combined with Paracore, Coltène). Roots were then sectioned horizontally and immersed in H2O2 to remove the Rhodamine B not fixed by the sealers. The empty dentin spaces were labeled with a green fluorophore (Fluorescein) enabling the evaluation of infiltration as well as microleakage by confocal microscopy. Two additional samples were fractured in vertical direction for observation under SEM. Results Group RC presented significantly more infiltration in the middle third than in the middle and apical thirds of group AH. Microleakage was significantly higher in group AH than in group RC. SEM images revealed more dentin plugs and a homogenous resin layer in group RC in contrast to group AH. Conclusion The resin-based cement revealed promising outcomes compared to a traditional epoxy resin based sealer.
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Affiliation(s)
- Clara Isabel Anton Y Otero
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Nicolas Liaudet
- Bioimaging Core Facility, University of Geneva, Geneva, Switzerland
| | - Enrico di Bella
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Marwa Abdelaziz
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Albert Feilzer
- Department of Dental Material Sciences, Academic Center for Dentistry Amsterdam (ACTA), Gustav Mahlerlaan, LA Amsterdam
| | - Ivo Krejci
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Laurine Marger
- Division of Cariology and Endodontology, CUMD - University Clinics of Dental Medicine, Faculty of Medicine, University of Geneva, Geneva, Switzerland
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Jasrasaria N, Tikku AP, Bharti R. Analysis of porosity, sealer dissolution and apical extrusion of endodontic sealers: A micro computed tomography study. J Oral Biol Craniofac Res 2023; 13:495-499. [PMID: 37293581 PMCID: PMC10244689 DOI: 10.1016/j.jobcr.2023.05.013] [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: 08/10/2022] [Revised: 04/03/2023] [Accepted: 05/27/2023] [Indexed: 06/10/2023] Open
Abstract
Aim The aim of the study was to determine the porosity, dissolution and apical extrusion of AH Plus, MTA Fillapex and EndoSequence BC sealer after immersion in phosphate buffered saline (PBS) using microcomputed tomography (micro-CT). Methodology Forty-eight single-rooted teeth were selected. Gutta percha and one of the aforementioned root canal sealers was used for obturation using continuous wave technique. The specimens were scanned after obturation and after seven days of immersion in PBS, by using micro-computed tomography. Porosity, sealer dissolution and apical extrusion were calculated. Statistical analysis was done by using paired t-test, post hoc tukey test and Fischer exact test. Results Significantly higher percentage of porosity and dissolution of sealer in the apical 4 mm was found for MTA Fillapex and EndoSequence BC sealer than for AH Plus. The incidence of apical extrusion was significantly more in MTA Fillapex (56.25%), followed by EndoSequence BC (31.25%) and AH Plus (0%). Conclusions None of the three root canal sealers exhibited perfect three-dimensional obturation. The sealers manifested porosity, dissolution and apical extrusion to varying degrees both after obturation and after storage in PBS for 7 days.
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Affiliation(s)
- Neha Jasrasaria
- Department of Conservative Dentistry and Endodontics, King George Medical University, Lucknow, India
| | - Aseem P. Tikku
- Department of Conservative Dentistry and Endodontics, King George Medical University, Lucknow, India
| | - Ramesh Bharti
- Department of Conservative Dentistry and Endodontics, King George Medical University, Lucknow, India
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Rodrigues CT, Jacobs R, Ezeldeen M, Vasconcelos KDF, Lambrechts P, Tanomaru Filho M, Pinto JC, Duarte MAH. How does nano-focus computed tomography impact the quantification of debris within the root canal system? Braz Oral Res 2023; 37:e059. [PMID: 37341232 DOI: 10.1590/1807-3107bor-2023.vol37.0059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Accepted: 01/05/2023] [Indexed: 06/22/2023] Open
Abstract
The aim of this study was to compare the quantification of hard-tissue debris by using micro-computed tomography (micro-CT) and nano-focus computed tomography (nano-CT) after root canal instrumentation. Ten mandibular molars containing an isthmus in the mesial root were scanned in a SkyScan 1172 micro-CT device with a voxel size of 12.8 µm and in a NanoTom nano-CT device with 5.5 µm. The mesial root canals were irrigated with 5 mL of saline solution at the orifice level, instrumented with Reciproc R25 files and a second scanning was performed by micro-CT and nano-CT devices for post-instrumentation images. DataViewer software was used for registering the pre- and post-operative micro-CT and nano-CT images. The root canal and the debris were segmented for quantitative analysis of the volume of the canal and volume of debris using CTAn software. Statistical analysis was performed using the T test for comparison between volume of the canal after instrumentation and volume of debris in both image modalities. The level of significance was set at p < 0.05. Nano-CT images showed higher values of debris when compared with micro-CT (p < 0.05) after root canal instrumentation. No difference was observed between the volume of the root canal after instrumentation in the two imaging methods used (p > 0.05). Nano-CT technology can be recommended as a more precise method for quantitative analysis of hard-tissue debris. Moreover, in Endodontic research it is a promising method, as it is capable of providing higher spatial and contrast resolution, faster scanning and higher image quality.
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Affiliation(s)
- Clarissa Teles Rodrigues
- Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru, SP, Brazil
| | - Reinhilde Jacobs
- University Hospitals Leuven, Faculty of Medicine, Department of Imaging and Pathology, Leuven, Belgium
| | - Mostafa Ezeldeen
- University Hospitals Leuven, Faculty of Medicine, Department of Imaging and Pathology, Leuven, Belgium
| | | | - Paul Lambrechts
- University Hospitals Leuven, KU Leuven and Dentistry, Department of Oral Health Sciences, Endodontology, Leuven, Belgium
| | - Mario Tanomaru Filho
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil
| | - Jader Camilo Pinto
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Restorative Dentistry, Araraquara, SP, Brazil
| | - Marco Antonio Hungaro Duarte
- Universidade de São Paulo - USP, Bauru School of Dentistry, Department of Restorative Dentistry, Endodontics and Dental Materials, Bauru, SP, Brazil
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Ramos GT, Lucisano MP, Victorio DJB, Ramirez-Sotelo LR, Nelson-Filho P, da Silva RAB, Koecklin KHU, da Silva LAB. Estimation of root canal conicity of deciduous canines evaluated by nano-CT. Eur Arch Paediatr Dent 2023:10.1007/s40368-023-00809-y. [PMID: 37306868 DOI: 10.1007/s40368-023-00809-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 06/01/2023] [Indexed: 06/13/2023]
Abstract
PURPOSE To estimate the taper of root canals of deciduous maxillary and mandibular canines by nano computed tomography (nano-CT). METHODS This in vitro study involved CT scan analysis of nine maxillary and five mandibular primary canines. The images of each tooth were reconstructed using OnDemand3D software. Thereon, diameter and taper analyses were performed on the free FreeCAD 0.18 software for the three-dimensional (3D) computer-aided design model. Statistical analysis was conducted using Stata v14.0 software, adopting a significance level of 5%. RESULTS 3D image reconstruction was performed, considering the diameters obtained along the entire length of the tooth root, and the conical model was built with a height of 10 mm. The diameters of the maxillary canine at points D0 (0 mm), D5 (5 mm), D7 (7 mm), and D10 (10 mm) were 1.62, 1.07, 0.78, and 0.49 mm, respectively, with a significant difference between the four points (p = 0.0001). Regarding maxillary canine root taper values in the cervical, middle, and apical regions, the values were 12%, 14%, and 10%, respectively. For mandibular canines, the mean diameter values obtained at points D0, D5, D7, and D10 were 1.51, 0.83, 0.64, and 0.45 mm, respectively, with significant differences among the four points (p = 0.005). The inferior canine root tapers in the cervical, middle, and apical regions were 14%, 10%, and 6%, respectively. CONCLUSION The detailed knowledge of the root morphology of maxillary and mandibular deciduous canines, as it has been shown in vitro using nano-CT, is critical to achieve accurate and efficient endodontic treatments.
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Affiliation(s)
- Gilmer Torres Ramos
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
- Departamento de Odontopediatría, Facultad de Odontologia, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Marília Pacífico Lucisano
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil.
| | - Daniel José Blanco Victorio
- Departamento de Estomatología Médico Quirúrgico, Facultad de Odontologia, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Laura Ricardina Ramirez-Sotelo
- Departamento de Estomatología Médico Quirúrgico, Facultad de Odontologia, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Paulo Nelson-Filho
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | - Raquel Assed Bezerra da Silva
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
| | | | - Lea Assed Bezerra da Silva
- Department of Pediatric Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Av. do Café, s/n, Monte Alegre, Ribeirão Preto, SP, 14040-904, Brazil
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Paksoy T, Ustaoğlu G, Şehirli AÖ, Ünsal RBK, Sayıner S, Orhan K, Aycı NB, Çetinel Ş, Aksoy U, Öğünç AV. Effect of bromelain on periodontal destruction and alveolar bone in rats with experimental periodontitis. Int Immunopharmacol 2023; 121:110446. [PMID: 37290321 DOI: 10.1016/j.intimp.2023.110446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 05/25/2023] [Accepted: 06/01/2023] [Indexed: 06/10/2023]
Abstract
PURPOSE Several substances that have anti-inflammatory, antiproteinase, and anti-infective properties have been evaluated as modulators of the inflammatory response in periodontal disease. However, evidence for the anti-inflammatory and antioxidative activities of bromelain is limited. This study evaluated the impact of systemically administered bromelain on the progression of experimental periodontitis. METHODS Four equal groups of 32 Wistar albino rats were created as follows (n = 8): control, periodontitis + saline, periodontitis + 5 mg/kg/day bromelain, and periodontitis + 10 mg/kg/day bromelain. To quantify the resorption of bone and bone volume/tissue volume, bone surface / bone volume, and connectivity, lower jawbones were fixed and then scanned using microcomputed tomography (micro CT). Blood samples were taken to measure the macrophage colony-stimulating factor(M-CSF) concentrations, receptor activator of nuclear factor kappa-Β ligand (RANKL), osteoprotegerin (OPG), tumor necrosis factor-alpha (TNF-α), matrix metalloproteinase-8 (MMP-8), interleukin-6(IL-6), glutathione peroxidase (GPx), superoxide dismutase (SOD), and malondialdehyde (MDA). Histopathological assessments were made to examine the tissue. RESULTS Treatment with bromelain improved the healing of the periodontium by decreasing the number of leukocytes and ligament deterioration in the gingival connective tissue and by supporting reintegration with alveolar bone. Bromelain used in ligature-induced periodontitis reduced alveolar bone (AB) resorption as measured by microCT; reduced inflammatory parameters such as IL-6 and TNF-α; regulated oxidative-antioxidative processes by increasing GPx and SOD and reducing MDA levels; and regulated AB modeling by decreasing M-CSF, RANKL, and MMP-8 and increasing OPG levels. CONCLUSION Bromelain may be an option in periodontal therapy by regulating cytokine levels, improving the healing process, and reducing bone resorption and oxidative stress.
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Affiliation(s)
- Tuğçe Paksoy
- Department of Periodontology, Hamidiye Faculty of Dentistry, University of Health Sciences, Istanbul, Turkey.
| | - Gülbahar Ustaoğlu
- Department of Periodontology, Faculty of Gülhane Dentistry, University of Health Sciences, Ankara, Turkey
| | - Ahmet Özer Şehirli
- Department of Pharmacology, Faculty of Dentistry, Near East University, 99138 Nicosia, Northern Cyprus, Mersin 10, Turkey
| | - Revan Birke Koca Ünsal
- Department of Periodontology, Faculty of Dentistry, University of Kyrenia, 99320 Kyrenia, Northern Cyprus, Mersin 10, Turkey
| | - Serkan Sayıner
- Department of Biochemistry, Faculty of Veterinary Medicine, Near East University, 99138 Nicosia, Northern Cyprus, Mersin 10, Turkey
| | - Kaan Orhan
- Department of DentoMaxillofacial Radiology, Ankara University, Ankara, Turkey
| | - Nurdan Bülbül Aycı
- Department of Histology and Embryology, School of Medicine, Tekirdağ Namık Kemal University, Tekirdağ, Turkey
| | - Şule Çetinel
- Department of Histology and Embryology, School of Medicine, Marmara University, Istanbul, Turkey
| | - Umut Aksoy
- Department of Endodontics, Faculty of Dentistry, Near East University, 99138 Nicosia, Northern Cyprus, Mersin 10, Turkey
| | - Ayliz Velioğlu Öğünç
- Vocational School of Health-Related Professions, Marmara University, Istanbul, Turkey
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11
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Sarrafan A, Soleymani A, Bagheri Chenari T, Seyedmajidi S. Comparison of push-out bond strength of endodontic sealers after root canal drying with different techniques. Clin Exp Dent Res 2023; 9:314-321. [PMID: 36806655 PMCID: PMC10098293 DOI: 10.1002/cre2.720] [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] [Received: 06/12/2022] [Revised: 01/23/2023] [Accepted: 01/24/2023] [Indexed: 02/21/2023] Open
Abstract
OBJECTIVES An ideal endodontic sealer should bond to both dentin and root-filling material. This study aimed to assess the push-out bond strength (PBS) of mineral trioxide aggregate (MTA)-Fillapex, Endoseal MTA, AH26, and Sure-Seal Root to root dentin after root canal drying with different techniques. MATERIALS AND METHODS This in vitro study was conducted on 160 extracted mandibular premolars. After root canal preparation, the teeth were randomly divided into four groups (n = 40) of drying with ethanol, paper point, air vacuum, and control (wet canal). Each group was divided into four subgroups (n = 10) for use of AH26, Sure-Seal Root, MTA-Fillapex, and Endoseal MTA sealers. The mean PBS was measured by a universal testing machine. The mode of failure was determined under a stereomicroscope. Data were analyzed by the Kruskal-Wallis and Games-Howell tests. RESULTS The maximum mean PBS was equally recorded in ethanol and paper point groups, and was significantly higher than that of control and air vacuum groups (p < .001). In the use of AH26 sealer, the mean PBS in drying with ethanol was significantly higher than all other methods (p < .05). The mean PBS in drying with a paper point was also significantly higher compared with control and air vacuum methods (p < .05). In the use of Sure-Seal, the mean PBS in drying with a paper point was significantly higher than other methods (p < .05). The mean PBS in drying with ethanol was significantly higher than that in control and air vacuum methods (p < .001). In the use of MTA-Fillapex and Endoseal-MTA, the technique of drying had no significant effect on PBS. Adhesive and mixed failures were the most common in all drying groups. CONCLUSIONS Drying with ethanol and paper point enhanced the PBS of sealers to root dentin.
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Affiliation(s)
- Ahmadreza Sarrafan
- Department of Endodontics, School of DentistryBabol University of Medical SciencesBabolIran
| | - Ali Soleymani
- Department of Endodontics, School of Dentistry, Dental Materials Research Center, Health Research InstituteBabol University of Medical SciencesBabolIran
| | - Tasnim Bagheri Chenari
- Department of Endodontics, School of Dentistry, Oral Health Center, Health Research InstituteBabol University of Medical SciencesBabolIran
| | - Seyedali Seyedmajidi
- School of Dentistry, Dental Materials Research Center, Health Research InstituteBabol University of Medical SciencesBabolIran
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12
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Comparison sealing ability in three bioceramic sealers applied in hydraulic condensation technique by using micro-computed tomography. J Dent Sci 2023. [DOI: 10.1016/j.jds.2023.02.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
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13
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Paksoy T, Ustaoğlu G, Şehirli AÖ, Ünsal RBK, Sayıner S, Orhan K, Aycı NB, Çetinel Ş, Aksoy U. Evaluation of the oxytocin effect in a rat model with experimental periodontitis. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2022; 395:1599-1608. [PMID: 36114855 DOI: 10.1007/s00210-022-02293-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2022] [Accepted: 09/08/2022] [Indexed: 01/26/2023]
Abstract
The aim of the present study was to evaluate the inhibitory effects of oxytocin on the development of periodontitis based on its properties against bone loss and resorption. Thirty-two Wistar albino rats were divided into four equal groups: control, periodontitis + saline, periodontitis + 0.5 mg/kg/day oxytocin, and periodontitis + 1 mg/kg/day oxytocin. Periodontitis groups received 4.0 silk ligatures around their cervixes of the right and left mandibular incisors in an "8" shape, kept for 14 days. Animals in oxytocin groups were injected once every day during 14 days with oxytocin. The mandibles were fixed and scanned using microcomputed tomography to quantify bone resorption and volumetric measurements. Blood samples were collected to analyze the concentrations of macrophage colony-stimulating factor (M-CSF), receptor activator of nuclear factor-κΒ ligand (RANKL), osteoprotegerin (OPG), matrix metalloproteinase-8 (MMP-8), tumor necrosis factor-alpha (TNF-α), interleukin (IL)-6, glutathione peroxidase (GPx), superoxide dismutase (SOD), and malondialdehyde (MDA). Histopathological evaluations were conducted to examine the gingiva and alveolar bone. Oxytocin prevented the development of periodontitis by decreasing ligament deteriorations and leukocytes in the gingival connective tissue and promoting reintegration with the alveolar bone. Bone resorption in all regions was less in the periodontitis + 1 mg/kg/day oxytocin group than in the periodontitis + saline group. Although TNF-α, IL-6, and RANKL values were lower in the periodontitis + 1 mg/kg/day oxytocin group, OPG was higher than that in the periodontitis + saline group. M-CSF, MMP-8, and MDA were lower in the oxytocin groups than in the periodontitis + saline group. Oxytocin may be an effective agent for periodontal diseases because it decreased bone resorption, oxidative stress, and inflammation in an experimental periodontitis.
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Affiliation(s)
- Tuğçe Paksoy
- Department of Periodontology, Faculty of Dentistry, İstanbul Atlas University, İstanbul, Turkey.
| | - Gülbahar Ustaoğlu
- Department of Periodontology, Gülhane Faculty of Dentistry, University of Health Sciences, Ankara, Turkey
| | - Ahmet Özer Şehirli
- Department of Pharmacology, Faculty of Dentistry, Near East University, Mersin 10, Turkey
| | - Revan Birke Koca Ünsal
- Department of Periodontology, Faculty of Dentistry, University of Kyrenia, Mersin 10, Turkey
| | - Serkan Sayıner
- Department of Biochemistry, Faculty of Veterinary Medicine, Near East University, Mersin 10, Turkey
| | - Kaan Orhan
- Department of DentoMaxillofacial Radiology, Ankara University, Ankara, Turkey
| | - Nurdan Bülbül Aycı
- Department of Histology and Embryology, School of Medicine, Tekirdağ Namık Kemal University, Tekirdağ, Turkey
| | - Şule Çetinel
- Department of Histology and Embryology, School of Medicine, Marmara University, İstanbul, Turkey
| | - Umut Aksoy
- Department of Endodontics, Faculty of Dentistry, Near East University, Mersin 10, Turkey
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Radwanski M, Leski M, Puszkarz AK, Sokolowski J, Hardan L, Bourgi R, Sauro S, Lukomska-Szymanska M. A Micro-CT Analysis of Initial and Long-Term Pores Volume and Porosity of Bioactive Endodontic Sealers. Biomedicines 2022; 10:2403. [PMID: 36289666 PMCID: PMC9599172 DOI: 10.3390/biomedicines10102403] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 09/19/2022] [Accepted: 09/23/2022] [Indexed: 11/21/2022] Open
Abstract
The evaluation of the porosities within the interface of root canals obturated with endodontics materials is extremely important for the long-term success of endodontic treatments. The aim of this study was to compare initial and long-term volume of pores (total, open, closed) and porosity (total, regional) of three bioactive endodontic sealers: GuttaFlow Bioseal, Total Fill BC Sealer, and BioRoot RCS. Root canals were obturated with three “bioactive” sealers using the single-cone technique. The volume of open and closed pores and porosity were calculated using a micro-computed tomography (MCT) method. The measurements were performed after 7 days (initial) and after 6 months (long-term) of incubation. Statistical significance was considered at p < 0.05. The total volume of pores remained unchanged after the 6-month storage. GuttaFlow Bioseal exhibited significantly higher long-term volume in open pores than Total Fill BC Sealer. The total porosity in all the tested sealers presented no statistically significant change after the 6-month storage, except for BioRoot RCS. The total porosity values of this latter material significantly increased after long-term incubation, especially in the apical region. In conclusion, the use of bioactive sealers with excessive tendency to create porosities both in shorth- and long-term periods of storage may compromise the long-term success of endodontic treatments.
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Affiliation(s)
- Mateusz Radwanski
- Department of Endodontics, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Michal Leski
- Department of Endodontics, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Adam K. Puszkarz
- Institute of Material Science of Textiles and Polymer Composites, Faculty of Material Technologies and Textile Design, Lodz University of Technology, 116 Żeromskiego Street, 90-924 Lodz, Poland
| | - Jerzy Sokolowski
- Department of General Dentistry, Medical University of Lodz, 251 Pomorska Str., 92-213 Lodz, Poland
| | - Louis Hardan
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon
| | - Rim Bourgi
- Department of Restorative Dentistry, School of Dentistry, Saint-Joseph University, Beirut 1107 2180, Lebanon
| | - Salvatore Sauro
- Dental Biomaterials and Minimally Invasive Dentistry, Departamento de Odontología, Facultad de Ciencias de la Salud, Universidad CEU-Cardenal Herrera C/Del Pozo ss/n, Alfara del Patriarca, 46115 Valencia, Spain
- Department of Therapeutic Dentistry, I.M. Sechenov First Moscow State Medical University, 119146 Moscow, Russia
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15
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Lobo NS, Jacobs R, Vasconcelos KDF, Wanderley VA, Santos BCD, Marciano MA, Zaia AA. Influence of working length and anatomical complexities on the apical root canal filling: a nano-CT study. Braz Dent J 2022; 33:1-7. [PMID: 35766712 PMCID: PMC9645203 DOI: 10.1590/0103-6440202204576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 12/08/2021] [Indexed: 12/02/2022] Open
Abstract
The present study aimed to compare the filled volume by gutta-percha and sealer
in the apical region of the main canal and ramifications, after instrumentation
at two different working lengths using nano-computed tomography (nano-CT).
Twenty-two premolars with apical ramifications were selected after
micro-computed tomography evaluation and were randomly divided into groups for
further endodontic instrumentation at two different working lengths: G1 - Root
canals shaped 1 mm short of the apical foramen (n=11), and G2 - Root canals
shaped at the apical foramen (n=11). After completing root treatment, nano-CT
images were acquired, and the filled volume by gutta-percha and sealer in the
main canal apical 0-4 mm and 0-1 mm ranges, and apical ramifications were
objectively measured by an operator specialized in both radiology and
endodontics, blinded for both groups. The Mann-Whitney test was applied to
compare both groups regarding the filling of the main canal apical ranges and
apical ramifications with a significance level of 5% (α ≤ 0.05). It was observed
that root canals shaped at the apical foramen had a larger volume of the main
canal filled than root canals shaped 1 mm short of the apical foramen, at both
apical ranges (0-4 and 0-1 mm) (p<0.05). Regarding the filling of the apical
ramifications, there was no significant difference between groups (p>0.05).
In conclusion, the root canals shaped at apical foramen exhibited increased
filling volume of the main canal in the apical region. However, neither of both
working lengths influenced filling of the apical ramifications.
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Affiliation(s)
- Natalia Siqueira Lobo
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Reinhilde Jacobs
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Karla de Faria Vasconcelos
- OMFS IMPATH research group, Department of Imaging and Pathology, Faculty of Medicine, University of Leuven and Oral & Maxillofacial Surgery, Leuven, Belgium
| | - Victor Aquino Wanderley
- Department of Oral Diagnosis, Division of Oral Radiology, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | | | - Marina Angélica Marciano
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
| | - Alexandre Augusto Zaia
- Department of Restorative Dentistry, Endodontic Division, Piracicaba Dental School, State University of Campinas, Piracicaba, São Paulo, Brazil
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16
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De-Deus G, Souza EM, Silva EJNL, Belladonna FG, Simões-Carvalho M, Moreira Cavalcante D, Versiani MA. A critical analysis of research methods and experimental models to study root canal fillings. Int Endod J 2022; 55 Suppl 2:384-445. [PMID: 35226760 DOI: 10.1111/iej.13713] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2021] [Revised: 02/21/2022] [Accepted: 02/21/2022] [Indexed: 11/28/2022]
Abstract
Canal filling materials and techniques have been one of the most studied topics in Endodontics. A simple search using the mesh term "root canal filling" in PubMed revealed more than 11,000 articles, an impressive number that is much higher than "root canal disinfection" (5,544 articles) or even the popular "root canal preparation" (8,527 articles). The overriding importance attributed to root filling procedures is not merely intuitive. It derived from the appealing relevance given by the appearance of the white lines in common radiographs grounded on retrospective clinical data that had identified the quality of a root filling as one of the major causes of treatment failure (lack of healing). Since the publication of the Washington study, impressive efforts have been made for the release of new materials and techniques, as well as, for the development of a plethora of laboratory methods to assess the quality of root filling procedures. This narrative review aims to address and discuss the most relevant laboratory methods to assess the root canal filling. Since filling quality improvements have not translated into higher success rates, as reported in longitudinal clinical studies, more than to deliver a simple methodology-based review, this paper aims to present an in-depth critical view on the assessment of laboratory methods used to study the filling materials and techniques. Recent data indicate that the long-term dimensional stability/degradation over time of endodontic sealers plays a central role in the treatment outcome. In this context, laboratory methods should be developed focusing on predicting, at least to some degree, the long-term clinical behaviour of root canal fillings, rather than simply ranking different materials or techniques.
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Affiliation(s)
- Gustavo De-Deus
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - Erick Miranda Souza
- Department of Dentistry II, Federal University of Maranhão, São Luís, Maranhão
| | - Emmanuel João Nogueira Leal Silva
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.,Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | | | - Marco Simões-Carvalho
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
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Hajihassani N, Heidari S, Ghanati M, Mohammadi N. Comparison of Fracture Resistance of the Endodontically Treated Roots with Two Sealer Types: An In Vitro Study. DENTAL HYPOTHESES 2022. [DOI: 10.4103/denthyp.denthyp_29_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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18
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Chopra V, Davis G, Baysan A. Physico-Chemical Properties of Calcium-Silicate vs. Resin Based Sealers-A Systematic Review and Meta-Analysis of Laboratory-Based Studies. MATERIALS 2021; 15:ma15010229. [PMID: 35009375 PMCID: PMC8745986 DOI: 10.3390/ma15010229] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Revised: 12/02/2021] [Accepted: 12/16/2021] [Indexed: 01/10/2023]
Abstract
INTRODUCTION The aim of this systematic review is to analyse the effect of physico-chemical properties of calcium silicate-based sealers in comparison to epoxy resin sealers in permanent teeth using a single-cone obturation technique. METHODS The study was conducted according to the guidelines of Cochrane Handbook for Systematic Reviews of Interventions and Preferred Reporting Items for Systematic Review and Meta-Analyses (PRISMA) statement. Literature search was performed using the PubMed/MEDLINE, Cochrane Central Register of Controlled Trials, Web of Science, DOAJ, Open Gray with no language restrictions until October 2020. Two reviewers assessed the studies for eligibility. Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) was carried out to assess the evidence. Meta-analysis of the pooled data with subgroups was performed using the RevMan software (p < 0.05). RESULTS Results from the 28 included studies showed that the mean difference in adaptation to root canal walls (marginal adaptation, interfacial gaps and void volume) for both sealers were non-significant. However, void volume values showed a significant mean difference (p < 0.00001) favouring the calcium silicate-based sealers. The pooled meta-analysis reported statistically significant differences for apical microleakage (p = 0.0007) whilst there were non-significant mean differences for fracture resistance (p = 0.09) and push-out bond strength (p = 0.63). The heterogeneity among the included studies was 97% (I2). CONCLUSIONS Within the limitations of this review, calcium silicate-based sealers demonstrated a similar or superior performance in comparison to resin-based sealers in terms of the physico-chemical properties.
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Affiliation(s)
- Viresh Chopra
- Department of Adult Restorative Dentistry, Oman Dental College, Department of Oral Bioengineering, Queen Mary University, Mile End Rd. Bethnal Green, London E1 4NS, UK;
| | - Graham Davis
- Institute of Dentistry, Faculty of Medicine and Dentistry, Queen Mary University of London, Mile End Rd. Bethnal Green, London E1 4NS, UK;
| | - Aylin Baysan
- Institute of Dentistry, Faculty of Medicine and Dentistry, Queen Mary University of London, Mile End Rd. Bethnal Green, London E1 4NS, UK;
- Correspondence: ; Tel.: +44-96896632942
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19
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Munive-Degregori A, Mayta-Tovalino F, Lúcar-Flores C, Mendoza R, Alvitez-Temoche D, Guillen-Galarza C. A Comparative Evaluation of Endodontically Treated Root Canals Obturated Using Gutta-percha with Two Different Protocols: An In-vitro Study. J Int Soc Prev Community Dent 2021; 11:678-684. [PMID: 35036377 PMCID: PMC8713498 DOI: 10.4103/jispcd.jispcd_113_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2021] [Revised: 06/25/2021] [Accepted: 07/14/2021] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE The aim of this article is to evaluate the quality of filling in endodontically treated root canals using the lateral condensation technique and modified lateral condensation technique. MATERIALS AND METHODS Thirty-two single-rooted teeth were divided into two groups that were assigned by simple randomization according to the filling technique. Once the endodontic treatment was performed, a periapical radiograph was taken to assess the quality according to the radiographic density and tomography was taken to evaluate the quality according to the tomographic volume of spaces, compared with the post-preparation biomechanical tomography. Finally, we performed a statistical analysis (Student's t-test) to evaluate whether there were differences between the types of filling. RESULTS Radiographic radiodensity was 182.89 ± 9.81 and 186.72 ± 6.97 HU for teeth treated with the lateral condensation technique and modified lateral condensation technique, respectively. The void volume was 3.75 ± 2.35 and 2.43 ± 1.18 mm3 for teeth treated with the lateral condensation technique and modified lateral condensation technique, respectively. CONCLUSION No significant differences were found between the techniques for both filling quality parameters.
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Affiliation(s)
- Arnaldo Munive-Degregori
- Postgraduate Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Frank Mayta-Tovalino
- Postgraduate Department, CHANGE Research Working Group, Faculty of Health of Sciences, Universidad Científica del Sur, Lima, Peru,Address for correspondence: Dr. Frank Mayta-Tovalino, Postgraduate Department, CHANGE Research Working Group, Faculty of Health of Sciences, Universidad Científica del Sur, Av. Paseo de la República 5544, Miraflores, Lima 15074, Peru. E-mail:
| | - Cecilia Lúcar-Flores
- Academic Department, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru
| | - Roman Mendoza
- Postgraduate Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Daniel Alvitez-Temoche
- Postgraduate Department, Faculty of Dentistry, Universidad Nacional Federico Villarreal, Lima, Peru
| | - Carlos Guillen-Galarza
- Academic Department, Faculty of Dentistry, Universidad Nacional Mayor de San Marcos, Lima, Peru
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Cho YS, Kwak Y, Shin SJ. Comparison of Root Filling Quality of Two Types of Single Cone-Based Canal Filling Methods in Complex Root Canal Anatomies: The Ultrasonic Vibration and Thermo-Hydrodynamic Obturation versus Single-Cone Technique. MATERIALS 2021; 14:ma14206036. [PMID: 34683625 PMCID: PMC8539525 DOI: 10.3390/ma14206036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 09/20/2021] [Accepted: 10/09/2021] [Indexed: 11/16/2022]
Abstract
This study aimed to assess the effectiveness of ultrasonic vibration and thermo-hydrodynamic obturation (VibraTHO) using two types of root canal sealers, in comparison to the single-cone (SC) technique and a calcium silicate-based root canal sealer in complex root canal anatomies. Thirty single-rooted human maxillary premolars with two canals that had a complex root canal anatomy of transverse anastomoses or ramifications were prepared and assigned to the following three experimental groups, according to the filling method: SE group, SC technique with Endoseal TCS; VE group, VibraTHO with Endoseal TCS; and VG group, VibraTHO with GuttaFlow 2. Each tooth was scanned using micro-computed tomography, and the volume percentages of the filling material were calculated. The analysis of variance was used to analyze the statistical differences between the three groups (p < 0.05). The mean volume of the filling material was higher in the VG and VE groups than that in the SE group (p < 0.05) along the apical to middle-to-coronal thirds, and significant differences were observed between each root canal area (p < 0.05), with the only exception being at the apical thirds between the VE and SE groups. The VibraTHO technique using GuttaFlow 2 can be a more effective root canal filling method for anatomically complex root canal systems than the SC technique with Endoseal TCS. On the other hand, the VibraTHO technique using Endoseal TCS has a limited effect on improving the quality of the root filling at the apical portion of anatomically complex root canal systems, compared to the SC technique with Endoseal TCS.
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Affiliation(s)
- Yong-Sik Cho
- Department of Conservative Dentistry, College of Dentistry, Yonsei University, Seoul 03722, Korea;
- Private Practice—Yonsei Doctors’ Dental Clinic, 201, 28 Daesan-ro, Ilsandong-gu, Goyang-si 10359, Korea
| | - Youngjun Kwak
- Private Practice—Yonsei Nature Dental Clinic, 2F, 281 Yangnyeong-ro, Dongjak-gu, Seoul 06919, Korea;
| | - Su-Jung Shin
- Gangnam Severance Hospital, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea
- Correspondence: ; Tel.: +82-2-2019-3572; Fax: +82-2-3463-4052
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Colmenar D, Tamula T, Zhu Q, Ahn C, Primus C, Komabayashi T. Micro CT pilot evaluation of removability of two endodontic sealers. J Oral Sci 2021; 63:306-309. [PMID: 34408113 DOI: 10.2334/josnusd.21-0196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
PURPOSE This study compared the removability of AH Plus and EndoSequence BC sealers using in vitro micro-computed tomography. METHODS Ten single-canal, extracted human teeth were cleaned and shaped with ProTaper NEXT rotary files to size X5 (50/0.06) (Dentsply-Sirona). Canals were obturated with a single cone gutta-percha and either AH Plus (Dentsply-Sirona) (Group A) or EndoSequence BC (Brasseler) (Group B). ProTaper Universal Retreatment files (Dentsply-Sirona) were used to remove obturation materials after 90 days at 37oC/100% humidity. Each tooth was scanned using micro-computed tomography (SkyScan 1272; Bruker) at an isotropic resolution of 6 μm from which the percent of material removed was calculated. Two-sample t-tests and one-way ANOVA were used for analysis. RESULTS The percent removal of materials in the coronal third was 92.9% ± 7.3% (Group A) and 93.2% ± 6.1% (Group B). Removal in the middle third was 94.9% ± 8.5% (Group A) and 96.5% ± 6.1% (Group B). Apical third removal was 76.2% ± 27.9% (Group A) and 70.1% ± 30.8% (Group B). No statistically significant differences were determined between the two sealers or among the sectional thirds within each group (P > 0.05). CONCLUSION AH Plus and EndoSequence BC sealers exhibit the same removability at all canal levels of 70% to 96%, with better removal coronally.
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Affiliation(s)
| | - Tenzin Tamula
- University of New England College of Dental Medicine
| | - Qiang Zhu
- Division of Endodontology, University of Connecticut School of Dental Medicine
| | - Chul Ahn
- Department of Clinical Sciences, University of Texas Southwestern Medical Center
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22
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Milani AS, Kuzegari S, Zand V, Mokhtari H, Rahbar M. Ability of Calcium Silicate and Epoxy Resin-based Sealers to Fill the Artificial Lateral Canals in the Presence or Absence of Smear Layer. MAEDICA 2021; 16:458-462. [PMID: 34925604 PMCID: PMC8643567 DOI: 10.26574/maedica.2021.16.3.458] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Background:The lateral canals are pathways for bacteria and their products to pass between the root canal and the periradicular tissue. Objectives: The present study aims to compare the filling ability of the lateral canals with three calcium silicate based sealers, including MTA Fillapex, Endoseal MTA and Sure-Seal Root, and AH26 epoxy resin sealer in the presence and absence of the smear layer. Materials and methods:Six lateral canals were prepared using an engine reamer in 80 single-rooted human teeth. The root canals were cleaned, then the teeth were randomly divided into two groups. In group A, the smearlayer was removed using 17% EDTA and 5.25% NaOCl, and in group B, the canals were irrigated with normal saline. Groups A and B were divided into four subgroups each, according to the sealer used: A1, B1 (MTA Fillapex sealer), A2, B2 (Endoseal MTA sealer), A3, B3 (Sure-Seal Root sealer), and A4, B4 (AH26 sealer). Obturation of canals was conducted by the warm vertical technique and then teeth were incubated for 72 hours. Teeth were made clear and the filling of lateral canals were evaluated under stereomicroscope. Results:In group A, the highest lateral canals filling rate was in subgroup A2 and the lowest in subgroup A1, and the difference was statistically significant. However, in both groups, the highest lateral canals filling rate was in subgroups B2 and B3 and the lowest in subgroup B1. However, the difference was not statistically significant. In addition, no significant difference was observed in the lateral canals filling rate considering their position in the root. Conclusion:Providing the removal of the smear layer, calcium silicate-based sealers, Endoseal MTA and Sure-Seal Root had a higher ability to fill the lateral canals than AH26 and MTA fillapex sealers.
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Affiliation(s)
- Amin Salem Milani
- Endodontic Department, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Sepideh Kuzegari
- Endodontic Department, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Vahid Zand
- Endodontic Department, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hadi Mokhtari
- Endodontic Department, Faculty of Dentistry, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mahdi Rahbar
- Esthetic and Restorative Dentistry Department, School of Dentistry, Ardabil University of Medical Sciences, Ardabil, Iran
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23
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Lee YJ, Kim S, Shin SJ. Volume Percentage of Filling Voids in Root Canals Prepared by a Novel Nickel-Titanium Rotary System (TruNatomy) Using Two Different Obturation Techniques. MATERIALS 2021; 14:ma14143846. [PMID: 34300765 PMCID: PMC8305233 DOI: 10.3390/ma14143846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 07/04/2021] [Accepted: 07/06/2021] [Indexed: 11/16/2022]
Abstract
This study aimed to compare the volume percentage of filling voids in root canals prepared with a newly introduced rotary system, TruNatomy (Dentsply Maillefer), and obturated by the modified continuous wave (CW) or single cone (SC) filling technique. Plastic tooth models with four canals were enlarged by using TruNatomy files and randomly allocated into either the CW or SC group. The volume percentage of filling voids at 1–6 mm from the apex was analyzed by using microcomputed tomography; mean values were compared by using independent two-sample t-tests (p < 0.05). The mean volume percentages of the filling voids were 2.81 ± 1.11% and 1.77 ± 0.82% in the CW and SC groups, respectively. In the apical area (1–4 mm), volume percentages in the palatal were significantly different between the CW and SC groups; in the middle area (4–6 mm), volume percentages in the palatal and the second mesiobuccal canals were significantly different (p < 0.05). The SC group showed lower volume percentages of filling voids than the CW group. The canals prepared by the TruNatomy system can be obturated well by both the SC and CW techniques. The SC technique showed a lower number of voids, especially in the palatal canals.
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Affiliation(s)
- You Jin Lee
- Gangnam Severance Hospital, Department of Conservative Dentistry, Yonsei University College of Dentistry, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea;
| | - Sunil Kim
- Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, 50-1 Yonsei-Ro, Seodaemun-gu, Seoul 03722, Korea;
| | - Su-Jung Shin
- Gangnam Severance Hospital, Department of Conservative Dentistry and Oral Science Research Center, Yonsei University College of Dentistry, 211 Eonjuro, Gangnam-gu, Seoul 06273, Korea
- Correspondence: ; Tel.: +82-2-2019-3572; Fax: +82-2-3463-4052
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24
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Pinto JC, Torres FFE, Lucas-Oliveira E, Bonagamba TJ, Guerreiro-Tanomaru JM, Tanomaru-Filho M. Evaluation of curved root canals filled with a new bioceramic sealer: A microcomputed tomographic study using images with different voxel sizes and segmentation methods. Microsc Res Tech 2021; 84:2960-2967. [PMID: 34184360 DOI: 10.1002/jemt.23855] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 05/05/2021] [Accepted: 06/04/2021] [Indexed: 12/23/2022]
Abstract
The aim of this study was to investigate the filling ability of a new premixed bioceramic sealer in comparison with an epoxy resin-based sealer in curved root canals using different segmentation methods and voxel sizes in micro-CT images. Twelve curved mesial roots of mandibular molars with two separated canals were selected. All root canals were prepared by using HyFlex EDM files size 25/.08 and filled by the single cone technique and Bio-C Sealer or AH Plus (n = 12). The samples were scanned by micro-CT at 5 μm. The images were analyzed at 5, 10, and 20 μm for the volumetric analysis of voids in filling. Visual image segmentation was performed by two examiners, and the automatic segmentation was accomplished for comparison. Radiopacity of the sealers was evaluated by radiographic analysis. Data were submitted to the two-way ANOVA and non-paired t tests at a significance level of 5%. AH Plus had the highest radiopacity (p < .05). Root canals filled with AH Plus or Bio-C had similar low percentage of voids (p > .05). There was no difference interobserver, which had similar results to those obtained with automatic segmentation for all voxel sizes evaluated (p > .05). Bio-C Sealer had appropriate filling ability. Visual and automatic segmentation can be applied to micro-CT images with voxel sizes from 5 to 20 μm to evaluate the filling of sealers with adequate radiopacity. Automatic segmentation should be used as a faster method.
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Affiliation(s)
- Jader Camilo Pinto
- Department of Restorative Dentistry, Sao Paulo State University (UNESP), School of Dentistry, Araraquara, Sao Paulo, Brazil
| | | | | | - Tito Jose Bonagamba
- Sao Carlos Institute of Physics, University of Sao Paulo, Sao Carlos, Sao Paulo, Brazil
| | | | - Mario Tanomaru-Filho
- Department of Restorative Dentistry, Sao Paulo State University (UNESP), School of Dentistry, Araraquara, Sao Paulo, Brazil
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25
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Yuanli H, Juan W, Mengzhen J, Xuan C, Kaixin X, Xueqin Y, Xin Q, Hantao H, Yuan G, Ling Z. The effect of two endodontic sealers and interval before post-preparation and cementation on the bond strength of fiber posts. Clin Oral Investig 2021; 25:6211-6217. [PMID: 33818684 DOI: 10.1007/s00784-021-03920-w] [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] [Received: 09/19/2020] [Accepted: 03/29/2021] [Indexed: 02/05/2023]
Abstract
OBJECTIVES To evaluate the effect of different endodontic sealers (epoxy resin-based and bioceramic-based) and the time of post-cementation on the bond strength of a fiber post cemented with resin cement. METHODS Forty human premolars were instrumented and divided into 4 groups. According to the type of sealer and the time of post-cementation: AH-IM (AH Plus, post-cemented immediately after root canal treatment), SP-IM (iRoot SP, post-cemented immediately after root canal treatment), AH-OW (AH Plus, post-cementation after one week), and SP-OW (iRoot SP, post-cementation after one week). In each group, the samples were submitted to push-out test, and failure mode was assessed. Levene's test, one-way ANOVA, and Kruskal-Wallis analysis were applied for statistical analysis (α = 5%). RESULTS The highest mean push-out bond strength was obtained from the SP-IM group in the apical part (10.45 ± 5.15MPa), while the lowest was observed in samples from the AH-OW group in the middle part (2.63 ± 1.54 MPa). One-way ANOVA showed that within the same root region, the time of post-cementation had a negative influence on the bonding strength in the SP groups in the middle and apical portion (P<0.05), however, when comparing the effect of type of sealers on bonding strength between the OW groups or IM groups within the same root region, no significant difference was observed regardless of the post cementation time (P>0.05). CONCLUSIONS The bond strength of the fiber post was higher when the post was cemented immediately after root canal treatment when the bioceramic sealer was applied. CLINICAL RELEVANCE The correct choice of an endodontic sealer and the proper time of post-cementation may help to obtain the best quality of post-and-core restoration.
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Affiliation(s)
- He Yuanli
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Wu Juan
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Ji Mengzhen
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Chen Xuan
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Xiong Kaixin
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Yang Xueqin
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Qiao Xin
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Hu Hantao
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Gao Yuan
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China.,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China
| | - Zou Ling
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu, 610041, China. .,National Clinical Research Center for Oral Diseases, Department of Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, China.
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26
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Sturm R, Prates Soares A, Sterzenbach G, Bitter K. Interface analysis after fatigue loading of adhesively luted bundled fiber posts to human root canal dentin. J Mech Behav Biomed Mater 2021; 119:104385. [PMID: 33823357 DOI: 10.1016/j.jmbbm.2021.104385] [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] [Received: 12/24/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 11/27/2022]
Abstract
OBJECTIVES The aim of this study was to assess the fatigue loading behavior and fracture resistance of endodontically treated teeth restored with adhesively luted bundled fiber posts in comparison to solid fiber posts. Image analysis (2D and 3D) was applied to evaluate modes of failure and to characterize susceptible parts of the post-and-core interface. METHOD Crowns of 72 human similar-sized central upper incisors were removed and roots received a conventional root canal filling prior to establishing 4 groups of core build-up: No Post group (nP) received a 4 mm deep filling made of composite inside the canal with no dental post, fiber post group (FP) received a conventional solid post, and two experimental groups received bundles of 6 (FB6) or 12 (FB12) 0.3 mm thin fiber posts, respectively. Posts were placed adhesively inside the root canal using a dual-curing build-up composite in combination with a self-etch adhesive, the latter was also used for nP group. Upon completion of core build-ups, all teeth received full-ceramic crowns that recreated the original tooth form. Samples were subjected in a 135° angle to thermo-mechanical loading (TML) for 1.2 Mill. chewing cycles followed by static load tests (fracture resistance). Fracture modes as well as intracanal failure modes with respect to failed interfaces were analyzed using optical and electron microscopy (SEM). Microcomputer tomography (μCT) was used to exemplary compare pre and post TML geometries. RESULTS Static load test was significantly different between groups (p < 0.0005; Kruskal-Wallistest). Pairwise comparison showed that the nP group (221 ± 103N) failed at significantly lower forces compared to the FP (454 ± 184N), FB6 (477 ± 250N) and FB12 (478 ± 260N) groups (p ≤ 0,001; Mann-Whitney-U-test). Fracture modes were significantly affected by the presence or absence of a post (p ≤ 0,016; Chi-square test) revealing increased incidence of restorable fractures at the cervical region for nP group. Microscopic analysis revealed more intracanal failures at interfaces between post surfaces and composite for solid posts, whereas fiber bundled posts mostly failed at the interfaces between composite and dentin. Micro-CT analysis showed no alterations of the root-post-and-core structure after TML except slight deformations of occasionally entrapped voids. CONCLUSION Fracture resistance and fracture modes were significantly affected by the presence or absence of a post, whereas the investigated post groups did not differ from each other. However intracanal failure revealed differences in adhesive failures between solid fiber posts and bundled fiber posts. Deformations of entrapped voids, revealed by micro-Ct analyses after TML, lead to the assumption that applied forces result in alterations in the regions of voids.
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Affiliation(s)
- Richard Sturm
- Dept. of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Aßmannshauserstraße 4-6, 14197, Berlin, Germany.
| | - Ana Prates Soares
- Clinic for Oral and Maxillofacial Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, 13353 Berlin, Germany
| | - Guido Sterzenbach
- Dept. of Prosthodontics, Geriatric Dentistry and Craniomandibular Disorders, Charité - Universitätsmedizin Berlin, Aßmannshauserstraße 4-6, 14197, Berlin, Germany
| | - Kerstin Bitter
- Dept. of Operative and Preventive Dentistry, Charité - Universitätsmedizin Berlin, Aßmannshauserstraße 4-6, 14197, Berlin, Germany
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27
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Fernandes Zancan R, Hadis M, Burgess D, Zhang ZJ, Di Maio A, Tomson P, Hungaro Duarte MA, Camilleri J. A matched irrigation and obturation strategy for root canal therapy. Sci Rep 2021; 11:4666. [PMID: 33633128 PMCID: PMC7907354 DOI: 10.1038/s41598-021-83849-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Accepted: 02/09/2021] [Indexed: 11/21/2022] Open
Abstract
In root canal therapy, irrigating solutions are employed to eliminate the bacterial load and also prepare dentin for sealer interaction. The aim of this research was to assess how irrigating solutions employed on their own or in sequence affected the tooth structure. The best way to prepare the tooth for obturation using hydraulic calcium silicate cement (HCSC) sealers and gutta-percha, thus guiding clinicians on a matched irrigation-obturation strategy for optimized root canal treatment was investigated. The effect of irrigating solutions on dentine was investigated by assessing changes in dentin microhardness, ultrastructure and mineral content, organic/inorganic matter, surface roughness and Young’s modulus. The interaction of four root canal sealers with the dentin was analysed by assessing the changes in microhardness of the dentin after sealer placement and also the sealer to dentin interface by scanning electron and confocal laser microscopy. The irrigating solutions damaged the dentin irreversibly both when used on their own and in combination. The best sequence involved sodium hypochlorite followed by chelator and a final rinse with sodium hypochlorite and obturation using HCSC sealers that enabled the restoration of dentin properties. The HCSC sealers did not rely on chelator irrigating solutions for a good material adaptation to dentin.
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Affiliation(s)
- Rafaela Fernandes Zancan
- Department of Restorative Dentistry, Dental Materials and Endodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Mohammed Hadis
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - David Burgess
- School of Chemical Engineering, University of Birmingham, Birmingham, UK
| | - Zhenyu Jason Zhang
- School of Chemical Engineering, University of Birmingham, Birmingham, UK
| | | | - Phillip Tomson
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
| | - Marco Antonio Hungaro Duarte
- Department of Restorative Dentistry, Dental Materials and Endodontics, Bauru School of Dentistry, University of São Paulo, Bauru, São Paulo, Brazil
| | - Josette Camilleri
- School of Dentistry, Institute of Clinical Sciences, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK.
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28
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Santos-Junior AO, Tanomaru-Filho M, Pinto JC, Tavares KIMC, Torres FFE, Guerreiro-Tanomaru JM. Effect of obturation technique using a new bioceramic sealer on the presence of voids in flattened root canals. Braz Oral Res 2021; 35:e028. [PMID: 33605358 DOI: 10.1590/1807-3107bor-2021.vol35.0028] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Accepted: 11/19/2020] [Indexed: 12/24/2022] Open
Abstract
The aim of this study was to evaluate the filling ability of a new ready-to-use calcium silicate-based sealer using thermoplastic or single-cone technique in flattened root canals. Twenty-four flattened distal canals of mandibular molars with a buccolingual diameter 4 or more times larger than the mesiodistal diameter were selected. The root canals were prepared and filled (n = 12), according to the following techniques: thermoplastic or single-cone technique using Bio-C Sealer. The teeth were scanned using Skycan 1176 micro-computed tomography (micro-CT) - voxel size 8.74 µm, before and after filling the root canal. The percentage of voids in the filled root canals was evaluated, and the data were statistically analyzed using the unpaired t-test (α = 0.05). The root canals filled using the thermoplastic technique created a smaller percentage of voids in the cervical/middle thirds than those filled using the single-cone technique (p < 0.05). There was no difference in the percentage of voids using either technique in the apical third (p > 0.05). The flattened root canals in the cervical/middle thirds were better filled using the ready-to-use calcium silicate-based sealer associated to the thermoplastic technique, compared with the single-cone technique. In the apical third, the techniques showed similar filling ability.
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Affiliation(s)
- Airton Oliveira Santos-Junior
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | - Mário Tanomaru-Filho
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | - Jáder Camilo Pinto
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
| | | | - Fernanda Ferrari Esteves Torres
- Universidade Estadual Paulista - Unesp, School of Dentistry , Department of Restorative Dentistry , Araraquara , SP , Brazil
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29
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Türker SA, Uzunoğlu-Özyürek E, Kaşikçi S, Öndeş M, Geneci F, Çelik HH. Filling quality of several obturation techniques in the presence of apically separated instruments: A Micro-CT study. Microsc Res Tech 2020; 84:1265-1271. [PMID: 33378798 DOI: 10.1002/jemt.23685] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/09/2020] [Accepted: 12/15/2020] [Indexed: 11/05/2022]
Abstract
Separated root canal instruments may affect the quality of root canal obturation and hence the survival of endodontically treated teeth. Obturation techniques may influence filling-quality. The aim was to evaluate the obturation quality of teeth filled with different obturation techniques in the presence of apically separated instruments using micro-computed tomography (μ-CT). Notched ProTaper F2 rotary-files were separated in the apical third of 36-human mandibular incisors with single root/canal and mature apex. Samples were filled by an endodontist according to one of the following obturation techniques (n = 12): cold lateral-compaction (CLC), single-cone (SC) and thermoplastic injection (TI). Samples were scanned by the Skyscan 1,274® μ-CT device after 1-week at 37°C in 100% humidity. Images of the sections were evaluated with CTan software in terms of total-volume and volume percentage of the filling materials and voids between coronal end of the separated instrument and gutta-percha/sealer filled void-free sections. Data was analyzed using Kruskal-Wallis and Mann Whitney-U tests with a significance level of 5%. Kruskal-Wallis revealed differences among groups (p < 0.05).Pairwise comparisons revealed that less volume of voids were measured in SC (0.02 ± 0.03 mm3 ) compared to CLC (0.15 ± 0.16 mm3 ) and TI (0.18 ± 0.24 mm3 ) (p < 0.05); while TI was statistically similar with CLC (p > 0.05). Percentages of volumes of voids and filling materials were as follows for SC, CLC and TI, respectively: 8.88 ± 18.52% and 24.45 ± 38.40%, 46.92 ± 33.53% and 53.07 ± 33.53%, 40.54 ± 33.85% and 42.79 ± 34.45%. The obturation technique may have a significant impact on the volume of voids in the presence of a separated file. No obturation technique produced a void-free root canal filling.
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Affiliation(s)
- Sevinç Aktemur Türker
- Faculty of Dentistry, Department of Endodontics, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Emel Uzunoğlu-Özyürek
- Faculty of Dentistry, Department of Endodontics, Hacettepe University, Ankara, Turkey
| | - Sena Kaşikçi
- Faculty of Dentistry, Department of Endodontics, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Melike Öndeş
- Faculty of Dentistry, Ankara Yıldırım Beyazıt University, Ankara, Turkey
| | - Ferhat Geneci
- Faculty of Medicine,Department of Anatomy, Ankara Yıldırım Beyazıt University, Ankara, Turkey
| | - Hakan Hamdi Çelik
- Faculty of Medicine, Department of Anatomy, Hacettepe University, Ankara, Turkey
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30
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Volumetric Evaluation of 5 Root Canal Obturation Methods in TrueTooth 3-dimensional-Printed Tooth Replicas Using Nano-computed Tomography. J Endod 2020; 47:485-491.e4. [PMID: 33245972 DOI: 10.1016/j.joen.2020.11.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 11/09/2020] [Accepted: 11/12/2020] [Indexed: 11/22/2022]
Abstract
INTRODUCTION The aim of this study was to evaluate the volumes of total obturation and voids in different obturation techniques using nano-computed tomographic imaging. The null hypothesis was that the obturation technique and the materials used have no effect on the total volume of obturation or the total volume of voids. METHODS Fifty maxillary left central incisor 3-dimensional-printed replicas (TrueTooth; Dental Engineering Laboratories, Santa Barbara, CA) were instrumented and randomly assigned to 5 different obturation groups (n = 10): single cone with EndoSequence Gutta-Percha Points (Brasseler USA, Savannah, GA) and Ribbon Sealer (Dentsply Sirona, Tulsa, OK) (SC1), single cone with BC 150 Series Gutta-Percha Points (Brasseler USA) and EndoSequence BC Sealer (Brasseler USA) (SC2), continuous wave with EndoSequence Gutta-Percha Points and Ribbon Sealer (CW), GuttaCore carrier obturation (Dentsply Sirona) and Ribbon Sealer (GC), and cold lateral condensation with EndoSequence Gutta-Percha Points and Ribbon Sealer (CL). After obturation, nano-computed tomographic images were obtained, and volumetric analysis was performed. Statistical analysis using 1-way analysis of variance (ANOVA). The level of significance was set at 5% (P < .05). RESULTS The 1-way ANOVA for total obturation indicated a statistically significant effect of group on obturation. Post hoc tests revealed a significant difference between the SC2, CW, and CL groups compared with the SC1 and GC groups. The 1-way ANOVA for calculated voids indicated a statistically significant effect of group on voids. Post hoc tests revealed significant differences between the SC1 group and the GC and CL groups. CONCLUSIONS This study concluded that obturation technique and the materials used significantly affect the total volume of obturation material and potential for voids.
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Main and Accessory Canal Filling Quality of a Premixed Calcium Silicate Endodontic Sealer According to Different Obturation Techniques. MATERIALS 2020; 13:ma13194389. [PMID: 33019753 PMCID: PMC7579472 DOI: 10.3390/ma13194389] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 09/26/2020] [Accepted: 09/28/2020] [Indexed: 12/12/2022]
Abstract
The present study aimed to investigate the effects of different obturation techniques on the main and accessory canal filling quality of a premixed calcium silicate endodontic sealer (Endoseal TCS). We also highlighted the validity of the methods used for evaluating the canal filling quality. Thirty single-rooted premolars were used for the main canal filling and 75 were used for accessory canal filling. The canals were instrumented and randomly divided into three groups according to the filling techniques: (1) single-cone technique (SC), (2) single-cone with ultrasonic activation (SU), and (3) warm vertical compaction (WV). Voids in relation to the root canal fillings were assessed using cross-section images from microcomputed tomography (μCT) scans or transversely sectioned tooth specimens (n = 10). After demineralization and clearing of the teeth, the incidence, number, and completeness of the accessory canal fillings were evaluated (n = 25). One-way analysis of variance (ANOVA) and Tukey's post hoc test was used for the evaluation of the voids in the main root canal and the incidence and number of filled accessory canals. Pearson's chi-squared (χ2) test was used for the evaluation of the filling completeness (α = 0.05). In the stereomicroscopic evaluation of the sectioned specimen, the SC group had significantly higher void occurrence than the other groups (p < 0.05), although there was no difference between groups in the μCT evaluation. However, there was no difference between the SU and WV. There was no difference between all the groups regarding the incidence, number, and completeness of the accessory canal fillings. When the premixed calcium silicate sealer is used with SC, the ultrasonic activation is recommended to obtain a better main canal filling quality. In contrast, the obturation techniques did not affect the accessory canal filling. We also recommend using the sectioning method when the void formation in the root canal filling materials is evaluated.
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Nano-CT as tool for characterization of dental resin composites. Sci Rep 2020; 10:15520. [PMID: 32968120 PMCID: PMC7511412 DOI: 10.1038/s41598-020-72599-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/03/2020] [Indexed: 12/15/2022] Open
Abstract
Technological advances have made it possible to examine dental resin composites using 3D nanometer resolution. This investigation aims to characterize existing dental nano-hybrid and micro-hybrid resin composites through comparing and contrasting nano-computed tomography (nano-CT) with micro-CT and high-resolution SEM images. Eight commercially available and widely used dental resin composites, 2 micro-hybrid and 6 nano-hybrid were researched. Cured samples were examined and characterized using nano-CT (resolution 450 nm) and compared with micro-CT images (resolution 2 µm). Acquired images were reconstructed and image analysis was carried out to determine porosity and pore morphology. A comprehensive comparison of scanning micrograph images unsurprisingly revealed that the nano-CT images displayed greater detail of the ultrastructure of cured dental resin composites. Filler particle diameters and its volumes were lower when measured using nano-CT, porosity being higher where analysed at higher resolution. There were large variations between the examined materials. Fewer voids were found in Tetric EvoCeram and IPS Empress Direct, the smallest pores being found in Universal XTE and Tetric EvoCeram. Nano-CT was successfully used to investigate the morphology of dental resin composites and showed that micro-CT gives a lower porosity and pore size but overestimates filler particle size. There were large discrepancies between the tested composites. Evidence of porosities and pores within a specimen is a critical finding and it might have a detrimental effect on a material’s clinical performance.
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Ferreira I, Laranjo M, Marto CM, Casalta-Lopes J, Serambeque B, Gonçalves AC, Sarmento-Ribeiro AB, Carrilho E, Botelho MF, Baptista Paula A, Marques Ferreira M. GuttaFlow ® Bioseal Cytotoxicity Assessment: In Vitro Study. Molecules 2020; 25:E4297. [PMID: 32961683 PMCID: PMC7571006 DOI: 10.3390/molecules25184297] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2020] [Accepted: 09/18/2020] [Indexed: 01/09/2023] Open
Abstract
The sealers used for root canal treatment should be biocompatible for the peri-radicular tissues, to evaluate the cytotoxic effects of GuttaFlow® bioseal sealer and to compare them with AH26® epoxy resin. Culture media were conditioned with the GuttaFlow® bioseal and AH26® pellets. MDPC-23 odontoblast cell cultures were treated with conditioned medium and serial dilutions. To evaluate the metabolic activity and cellular viability, the MTT and SRB assays were performed. To determine the production of reactive oxygen species, the DHE and DCF-DA probes were used. Cell cycle and cell-death types were assessed by cytometry, and to evaluate the mineralization capacity, the Alizarin Red S coloration was used. Statistical analysis was performed using analysis of variance (ANOVA) when normality was found and Kruskal-Wallis on the opposite case. For the comparison with normality values, the Student t-test was used. Cells exposed to the GuttaFlow® bioseal conditioned medium maintained high metabolic activities, except at higher concentrations. Likewise, viability was maintained, but a significant decrease was observed after exposure to the highest concentration (p < 0.001), associated with cell death by late apoptosis and necrosis. When cell cultures were exposed to AH26®, metabolic activity was highly compromised, resulting in cell death. An imbalance in the production of peroxides and superoxide anion was observed. GuttaFlow® bioseal showed higher biocompatibility than AH26®.
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Affiliation(s)
- Inês Ferreira
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (I.F.); (M.M.F.)
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (M.L.); (B.S.); (M.F.B.)
| | - Mafalda Laranjo
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (M.L.); (B.S.); (M.F.B.)
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
| | - Carlos Miguel Marto
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Institute of Experimental Pathology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - João Casalta-Lopes
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Radiation Oncology Department, Coimbra University Hospital Centre, 3000-548 Coimbra, Portugal
| | - Beatriz Serambeque
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (M.L.); (B.S.); (M.F.B.)
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
| | - Ana Cristina Gonçalves
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Laboratory of Oncobiology and Hematology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Ana Bela Sarmento-Ribeiro
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Laboratory of Oncobiology and Hematology, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Eunice Carrilho
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Institute of Integrated Clinical Practice, Faculty of Medicine, University of Coimbra, 300-075 Coimbra, Portugal
| | - Maria Filomena Botelho
- Institute of Biophysics, Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (M.L.); (B.S.); (M.F.B.)
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
| | - Anabela Baptista Paula
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
- Institute of Integrated Clinical Practice, Faculty of Medicine, University of Coimbra, 300-075 Coimbra, Portugal
- Avenida Byssaya Barreto, Blocos de Celas, 3000-075 Coimbra, Portugal
| | - Manuel Marques Ferreira
- Institute of Endodontics, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal; (I.F.); (M.M.F.)
- Institute for Clinical and Biomedical Research (iCBR), Area of Environment Genetics and Oncobiology (CIMAGO), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal; (C.M.M.); (J.C.-L.); (A.C.G.); (A.B.S.-R.); (E.C.)
- Centre for Innovative Biomedicine and Biotechnology (CIBB), 3000-548 Coimbra, Portugal
- Clinical Academic Center of Coimbra, CACC, 3004-561 Coimbra, Portugal
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Li J, Bergeron BE, Chao J, Xu T, Tay FR, Fan B. Micro-computed tomography evaluation of root canal filling quality with apical negative pressure. J Dent 2020; 100:103431. [PMID: 32682921 DOI: 10.1016/j.jdent.2020.103431] [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: 06/11/2020] [Revised: 07/13/2020] [Accepted: 07/14/2020] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVES The objective of the present study was to compare, using micro-computed tomography (micro-CT), the location and volume percentage of voids in root canals that were obturated with a premixed tricalcium silicate sealer and a single gutta-percha master cone, in the presence or absence of apical negative pressure. METHODS Twenty extracted human mandibular premolars were cleaned and shaped. The teeth were assigned to 2 groups (n = 10) according to the filling technique: apical negative pressure sealer application combined with the single-cone technique (NPS) or syringe-assisted sealer application combined with the single-cone technique (SS). Each specimen was scanned using micro-CT at 10 μm resolution. The percentages of voids were calculated from segmental regions of interest. Data were analysed using nonparametric statistical methods, with statistical significance pre-set at α = 0.05. RESULTS Significant difference was identified (p < 0.05) in the overall percentage of voids between the NPS group (0.33 %; interquartile range 0.25 %) and the SS group (6.29 %; interquartile range 5.57 %). In the NPS group, the percentages of voids in the coronal-third or middle-third of the canal space were statistically lower than that in apical-third (p < 0.0167, Bonferroni adjustment), with no significant difference between the former two groups. In the SS group, no significant difference in the percentages of voids was identified among the coronal-third, middle-third and apical-third of the canal space. CONCLUSIONS Apical negative pressure sealer application combined with the single-cone technique produces fewer voids in root canal fillings than the conventional single-cone technique. CLINICAL SIGNIFICANCE The apical negative pressure sealer application technique combined with single-cone filling constitutes a novel root canal obturation technique that improves the quality of root canal filling by minimising the volume of voids within the three-dimensional canal space.
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Affiliation(s)
- Jinxia Li
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Brian E Bergeron
- The Dental College of Georgia, Augusta University, Augusta, GA, USA
| | - Jing Chao
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Ting Xu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China
| | - Franklin R Tay
- The Dental College of Georgia, Augusta University, Augusta, GA, USA.
| | - Bing Fan
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) & Key Laboratory of Oral Biomedicine Ministry of Education, School & Hospital of Stomatology, Wuhan University, Wuhan, China.
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Mazzi-Chaves JF, de Faria Vasconcelos K, Pauwels R, Jacobs R, Sousa-Neto MD. Cone-beam Computed Tomographic-based Assessment of Filled C-shaped Canals: Artifact Expression of Cone-beam Computed Tomography as Opposed to Micro-computed Tomography and Nano-computed Tomography. J Endod 2020; 46:1702-1711. [PMID: 32682791 DOI: 10.1016/j.joen.2020.07.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/05/2020] [Indexed: 11/30/2022]
Abstract
INTRODUCTION The present study investigated the assessment of root canal fillings in a series of cone-beam computed tomographic (CBCT) images obtained from endodontically treated mandibular molars with C-shaped canals. METHODS Clinically comparable high (HR) and normal (NR) resolution protocols were selected in 3D Accuitomo 170 (J Morita Corporation, Kyoto, Japan), NewTom VGi evo (Cefla QR Verona, Verona, Italy), ProMax 3D Max (Pro; Planmeca, Helsinki, Finland), and Pax-i3D Green Premium (Pax; Vatech, Gyeonggi, South Korea). Micro-computed tomographic and nano-computed tomographic images were considered as the reference standard. The set of images was evaluated according to beam hardening artifact patterns (dark streaks, hypodense areas, and volume distortion). RESULTS Regarding dark streaks, the Fleiss kappa test showed that Pax HR and NR and Pro HR images showed the highest artifact expression. Hypodense areas were detected in 100% and 99.1% of the images obtained using Pax HR and NR, respectively. Kappa tests showed highest distortion for images derived from the Pax and Pro CBCT devices. Root canal filling assessment was considered appropriate in 100% of the 3D Accuitomo 170 HR, NewTom VGi evo NR, micro-computed tomographic, and nano-computed tomographic images. CONCLUSIONS The present study confirms the large variability in CBCT-derived artifact expression. Highlighting the increased artifact expression for particular CBCT systems, it may be concluded that for diagnosis of endodontically filled molars with C-shaped canals, the choice of CBCT unit and protocol is essential.
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Affiliation(s)
- Jardel Francisco Mazzi-Chaves
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil; Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria Vasconcelos
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium
| | - Ruben Pauwels
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Aarhus Institute of Advanced Studies, Aarhus University, Aarhus, Denmark; Faculty of Dentistry, Department of Radiology, Chulalongkorn University, Bangkok, Thailand
| | - Reinhilde Jacobs
- Oral and Maxillofacial Surgery, Imaging and Pathology Research Group, Faculty of Medicine, Department of Imaging and Pathology, University of Leuven, University Hospitals Leuven, Leuven, Belgium; Department of Dental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Manoel Damião Sousa-Neto
- Department of Restorative Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
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Torres FFE, Jacobs R, EzEldeen M, de Faria-Vasconcelos K, Guerreiro-Tanomaru JM, Dos Santos BC, Tanomaru-Filho M. How image-processing parameters can influence the assessment of dental materials using micro-CT. Imaging Sci Dent 2020; 50:161-168. [PMID: 32601591 PMCID: PMC7314609 DOI: 10.5624/isd.2020.50.2.161] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/14/2020] [Accepted: 02/20/2020] [Indexed: 12/17/2022] Open
Abstract
Purpose The aim of this study was to evaluate the influence of voxel size and different post-processing algorithms on the analysis of dental materials using micro-computed tomography (micro-CT). Materials and Methods Root-end cavities were prepared in extracted maxillary premolars, filled with mineral trioxide aggregate (MTA), Biodentine, and Intermediate Restorative Material (IRM), and scanned using micro-CT. The volume and porosity of materials were evaluated and compared using voxel sizes of 5, 10, and 20 µm, as well as different software tools (post-processing algorithms). The CTAn or MeVisLab/Materialise 3-matic software package was used to perform volume and morphological analyses, and the CTAn or MeVisLab/Amira software was used to evaluate porosity. Data were analyzed using 1-way ANOVA and the Tukey test (P<0.05). Results Using MeVisLab/Materialise 3-matic, a consistent tendency was observed for volume to increase at larger voxel sizes. CTAn showed higher volumes for MTA and IRM at 20 µm. Using CTAn, porosity values decreased as voxel size increased, with statistically significant differences for all materials. MeVisLab/Amira showed a difference for MTA and IRM at 5 µm, and for Biodentine at 20 µm. Significant differences in volume and porosity were observed in all software packages for Biodentine across all voxel sizes. Conclusion Some differences in volume and porosity were found according to voxel size, image-processing software, and the radiopacity of the material. Consistent protocols are needed for research evaluating dental materials.
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Affiliation(s)
| | - Reinhilde Jacobs
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium.,Department of Dental Medicine, Karolinska Institute, Stockholm, Sweden
| | - Mostafa EzEldeen
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | - Karla de Faria-Vasconcelos
- OMFS IMPATH Research Group, Department of Imaging and Pathology, Faculty of Medicine, KU Leuven and Oral and Maxillofacial Surgery, University Hospitals Leuven, Leuven, Belgium
| | | | | | - Mário Tanomaru-Filho
- Department of Restorative Dentistry, São Paulo State University (UNESP), School of Dentistry, Araraquara, SP, Brazil
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Root fillings with a matched-taper single cone and two calcium silicate–based sealers: an analysis of voids using micro-computed tomography. Clin Oral Investig 2020; 24:4487-4492. [DOI: 10.1007/s00784-020-03313-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Accepted: 04/24/2020] [Indexed: 12/13/2022]
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Camargo RV, Mazzi-Chaves JF, Leoni GB, Vasconcelos KF, Lamira A, Jacobs R, Sousa-Neto MD. Quantitative Assessment of 2-dimensional Parameters in Tomographic Images by Using Different Segmentation Methods. J Endod 2020; 46:694-699. [DOI: 10.1016/j.joen.2020.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 01/14/2020] [Accepted: 01/19/2020] [Indexed: 10/24/2022]
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Tek V, Türker SA. A micro-computed tomography evaluation of voids using calcium silicate-based materials in teeth with simulated internal root resorption. Restor Dent Endod 2020; 45:e5. [PMID: 32110534 PMCID: PMC7030960 DOI: 10.5395/rde.2020.45.e5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/13/2019] [Accepted: 10/14/2019] [Indexed: 11/11/2022] Open
Abstract
Objectives The obturation quality of MTA, Biodentine, Total Fill BC root canal sealer (RCS), and warm gutta-percha (WGP) in teeth with simulated internal root resorption (IRR) was evaluated by using micro-computed tomography. Materials and Methods Standardized IRR cavities were created using 40 extracted maxillary central incisor teeth and randomly assigned into 4 groups (n = 10). IRR cavities were filled with MTA, Biodentine, Total Fill BC RCS (bulk-fill form) and WGP + Total Fill BC RCS. Percentage of voids between resorptive cavity walls and obturation material (external void), and inside the filling materials (internal voids) were measured. Results Total Fill BC sealer in the bulk-fill form presented significantly highest values of external and internal void percentages (p < 0.05). Biodentine showed a significantly lowest external void percentage (p < 0.05). WGP + Total Fill BC RCS presented significantly lower values of internal void percentages than all groups (p < 0.05), except Biodentine (p > 0.05). Conclusion None of the filling materials were created void-free obturation in resorption cavities. Biodentine may favor its application in teeth with IRR over Angelus MTA and bulk-fill form of Total Fill BC.
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Affiliation(s)
- Vildan Tek
- Department of Endodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Sevinç Aktemur Türker
- Department of Endodontics, Faculty of Dentistry, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
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Torres FFE, Zordan‐Bronzel CL, Guerreiro‐Tanomaru JM, Chávez‐Andrade GM, Pinto JC, Tanomaru‐Filho M. Effect of immersion in distilled water or phosphate‐buffered saline on the solubility, volumetric change and presence of voids within new calcium silicate‐based root canal sealers. Int Endod J 2019; 53:385-391. [DOI: 10.1111/iej.13225] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Accepted: 09/26/2019] [Indexed: 12/13/2022]
Affiliation(s)
- F. F. E. Torres
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
| | - C. L. Zordan‐Bronzel
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
| | - J. M. Guerreiro‐Tanomaru
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
| | - G. M. Chávez‐Andrade
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
| | - J. C. Pinto
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
| | - M. Tanomaru‐Filho
- Department of Restorative Dentistry School of Dentistry São Paulo State University (Unesp) Araraquara Brazil
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Timme M, Masthoff M, Nagelmann N, Masthoff M, Faber C, Bürklein S. Imaging of root canal treatment using ultra high field 9.4T UTE-MRI - a preliminary study. Dentomaxillofac Radiol 2019; 49:20190183. [PMID: 31530016 DOI: 10.1259/dmfr.20190183] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
OBJECTIVES To investigate the potential of 9.4T ultrashort echo time (UTE) technology visualizing tooth anatomy and root canal treatment in vitro. In particular, it was evaluated whether the currently achievable resolution is suited presenting all anatomical structures and whether the root canal filling materials are distinguishable in UTE-MRI. METHODS Four extracted human teeth were examined using 9.4T UTE-MRI prior endodontic treatment (native teeth), after preparation and after obturation procedure. Root canal obturation was performed using warm vertical compaction (Schilder technique) with an epoxy-resin-based sealer. A single gutta-percha cone measured by MRI served as intensity-reference. MRI results were validated with corresponding histologic sections of the teeth. In addition, all teeth were examined at the different stages with CBCT and conventional X-ray. RESULTS 9.4T UTE-MRI enabled a precise visualization of root canal anatomy of all teeth at a resolution of 66 µm. After obturation, dentin, sealer and gutta-percha cones showed distinct MRI signal changes that allowed clear differentiation of the obturation materials from surrounding tooth structure. The filling materials, isthmal root canal connections and even dentin-cracks that were identified in the MR-images could be verified in histological sections. CONCLUSIONS 9.4T UTE-MRI is suitable for visualization of root canal anatomy, the evaluation of root canal preparation and obturation with a high spatial resolution and may provide a versatile tool for dental material research in endodontics.
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Affiliation(s)
- Maximilian Timme
- Department of Oral and Maxillofacial Surgery, University Hospital Münster, Muenster, Germany
| | - Max Masthoff
- Department of Clinical Radiology, University Hospital Muenster, Germany
| | - Nina Nagelmann
- Department of Clinical Radiology, University Hospital Muenster, Germany
| | | | - Cornelius Faber
- Department of Clinical Radiology, University Hospital Muenster, Germany
| | - Sebastian Bürklein
- Central Interdisciplinary Ambulance in the School of Dentistry, University Hospital Muenster, Germany
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The single cone obturation technique with a modified warm filler. J Dent 2019; 89:103181. [PMID: 31430509 DOI: 10.1016/j.jdent.2019.103181] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 07/31/2019] [Accepted: 08/13/2019] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES The aim of this study was to develop a new method of obturation by warm sealer in conjunction to single cone gutta-percha and evaluate the suitability of this technique to obturate complex root canal systems. METHODOLOGY Three root canal sealers namely, AH Plus, BioRoot RCS, GuttaFlow and a prototype sealer composed of tricalcium silicate and 30% zirconium oxide mixed with water and water-soluble polymer were investigated. The sealers were tested for flow, film thickness, setting time and radiopacity following ISO 6876 (2012) recommendations at room temperature and following heat application at 100°C to change the sealer properties. All the test sealers were characterized by scanning electron microscopy and energy dispersive spectroscopy. The volume of voids when used with a single cone obturation technique both unmodified and modified by heat was evaluated using microcomputed tomography. RESULTS Although the prototype sealer was designed to be similar to the BioRoot, its physical properties were found to be different. All sealers tested were affected by the heat and exhibited a change in the physical properties mainly the setting time, flow, film thickness and void volume. CONCLUSIONS The application of heat affected the sealer properties and void volume. The single cone obturation technique may not be suitable for complex canal anatomy and furthermore, AH Plus should not be subjected to high temperatures as its properties deteriorate and void volume increases.
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TORRES FFE, GUERREIRO-TANOMARU JM, PINTO JC, BONETTI-FILHO I, TANOMARU-FILHO M. Evaluation of flow and filling of root canal sealers using different methodologies. REVISTA DE ODONTOLOGIA DA UNESP 2019. [DOI: 10.1590/1807-2577.11219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Abstract Introduction Flow and filling ability of root canal sealers are indispensable for hermetic sealing of the root canal. Micro-computed tomography (micro-CT) can be used as a complementary methodology to evaluate such properties. Objective To evaluate the flow and filling ability of AH Plus, Endofill and Sealapex by conventional methodology and micro-CT. Material and method The flow of the sealers was analyzed according to ISO 6876/2012 and complemented by the area evaluation. Glass plates were manufactured with diameters of 1×1×2 mm and 1×1×1 mm (length, width and height), with a central cavity and four grooves in the horizontal and vertical directions. Each material was placed in the central cavity. Another glass plate and a metal weight were placed on the cement and kept for 10 minutes. The glass plate/sealer set was scanned using micro-CT. The flow was calculated by linear measurement of the material in the grooves. The central filling (mm3) was calculated in the central cavity and the lateral filling was measured up to 2 mm from the central cavity. Data were submitted to ANOVA/Tukey tests (α=0.05). Result All evaluated sealers presented flow according to ISO 6876 standards. The materials showed central cavity filling capacity higher than 80% and lateral filling greater than 75%. There was no difference in flow (mm and mm2) and in the filling ability (mm3) provided by the materials (p>0.05). Conclusion All evaluated root canal sealers showed adequate flow and filling capacity, suggesting their clinical application.
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Toursavadkohi S, Zameni F, Afkar M. Comparison of Tubular Penetration of AH26, EasySeal, and SureSeal Root Canal Sealers in Single-Rooted Teeth Using Scanning Electron Microscopy. JOURNAL OF RESEARCH IN DENTAL AND MAXILLOFACIAL SCIENCES 2018. [DOI: 10.29252/jrdms.3.3.27] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
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