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Versiani MA, Martins J, Ordinola-Zapata R. Anatomical complexities affecting root canal preparation: a narrative review. Aust Dent J 2023; 68 Suppl 1:S5-S23. [PMID: 37984802 DOI: 10.1111/adj.12992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/15/2023] [Indexed: 11/22/2023]
Abstract
A fundamental aspect of the Endodontic field is the knowledge of root canal anatomy. Using a variety of techniques, the internal and external anatomy of teeth have been extensively investigated throughout the past century. Recent improvements in three-dimensional computed tomography have enabled more detailed evaluations of root canal morphology in both clinical and laboratory settings. Essentially, researches have unveiled that the root canal constitutes a complex system, comprising not only the main root canal but also lateral components, including isthmuses, fins, accessory canals and apical ramifications. Undoubtedly, this intricate morphology poses a significant challenge when it comes to the process of shaping, cleaning and disinfecting the root canal system. This article aims to explore the anatomical aspects of the root canal system that impact the chemomechanical procedures.
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Affiliation(s)
- M A Versiani
- Dental Specialty Center, Brazilian Military Police, Belo Horizonte, Brazil
| | - Jnr Martins
- Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
- Grupo de Investigação em Bioquímica e Biologia Oral, Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
- Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE) - Cochrane Portugal, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - R Ordinola-Zapata
- Endodontic Division, Department of Restorative Sciences, University of Minnesota School of Dentistry, Minneapolis, Minnesota, USA
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Martins JNR, Silva EJNL, Baruwa AO, da Costa RP, Fernandes FMB, Versiani MA. Comparative analysis of reciprocating and flat side heat-treated rotary single-file systems: design, metallurgical characteristics, and mechanical performance. Int Endod J 2023. [PMID: 37029571 DOI: 10.1111/iej.13920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 04/03/2023] [Accepted: 04/05/2023] [Indexed: 04/09/2023]
Abstract
AIM To compare through a multimethod assessment two flat side single-file rotary instruments with three single-file reciprocating systems. METHODOLOGY A total of 290 new NiTi single-file rotary (AF F One Blue 25/0.06 and Platinum V.EU 25/0.06) and reciprocating (One Files Blue R25, Reciproc Blue R25, Reciproc R25) instruments were selected, carefully examined for any major deformations, and evaluated regarding their macroscopic and microscopic design, nickel and titanium elements ratio, phase transformation temperatures and mechanical performance (time/rotation to fracture, maximum torque, angle of rotation, microhardness, maximum bending and buckling strengths). Nonparametric Mood's median, one-way ANOVA post hoc Tukey, and T-test statistical tests were used (α=5%). RESULTS Tested instruments had identical blade counts and near-identical helical angles of approximately 24° (rotary instruments) and 151° (reciprocating instruments). The flat side analysis revealed a few inconsistencies, such as discontinuity segments, different orientations, and gaps in the homogeneity of the bluish color. Microscopically, flat side instruments exhibited blade discontinuity and an incomplete S-shaped cross-section. The surface finish was smoother for One Files Blue and more irregular for both rotary instruments. There were distinct phase transformation temperatures among all instruments. All heat-treated instruments were in an R-phase arrangement, and Reciproc was in an R-phase plus austenite at test temperature (20°C). Compared to the reciprocating instruments, both flat side instruments exhibited lower results in the cyclic fatigue tests using two clockwise kinematics, maximum torque, angle of rotation, and maximum buckling strength (p<0.05). The rotary systems also exhibited low flexibility (p<0.05). AF F One Blue had the lowest microhardness, while Reciproc had the highest value. CONCLUSION This multimethod investigation revealed that the flat side rotary instruments underperformed the reciprocating instruments regarding cyclic fatigue (with two different clockwise kinematics), maximum torque, angle of rotation, maximum buckling strength, and flexibility. Manufacturing inconsistencies were also observed in some of the flat side instruments, including discontinuity segments, different orientations, and in the homogeneity of their bluish color given by the heat treatment.
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Affiliation(s)
- J N R Martins
- Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
- Grupo de Investigação em Bioquimica e Biologia Oral, Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
- Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE) - Cochrane Portugal, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - E J N L Silva
- School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
- Fluminense Federal University, Rio de Janeiro, Brazil
| | - A O Baruwa
- Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - R Pereira da Costa
- Faculdade de Medicina Dentária, Universidade de Lisboa, Lisboa, Portugal
| | - F M Braz Fernandes
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Caparica, Portugal
| | - M A Versiani
- Dental Specialty Center, Brazilian Military Police, Belo Horizonte, Minas Gerais, Brazil
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Martins JNR, Silva EJNL, Marques D, Belladonna F, Simões-Carvalho M, Vieira VTL, Antunes HS, Braz Fernandes FMB, Versiani MA. Design, metallurgical features, mechanical performance and canal preparation of six reciprocating instruments. Int Endod J 2021; 54:1623-1637. [PMID: 33829516 DOI: 10.1111/iej.13529] [Citation(s) in RCA: 28] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 04/05/2021] [Indexed: 11/28/2022]
Abstract
AIM To compare six reciprocating instruments regarding their geometric design, metallurgical characteristics, mechanical behaviour and ability to prepare root canals. METHODOLOGY A total of 246 new 25-mm NiTi instruments (41 per group) from six reciprocating systems (Reciproc, Reciproc Blue, One Files, One Files Blue, Reverso Silver, and WaveOne Gold) were evaluated throughout a multimethod approach regarding their design using stereomicroscopy (number of blades and helix angle) and scanning electron microscopy (blades symmetry, cross section and surface finishing), nickel-titanium composition, phase transformation temperatures, mechanical performance (cyclic fatigue, torsional and bending resistance) and unprepared canal surface area on anatomically matched mandibular molars assessed by micro-CT. One-way ANOVA and post hoc Tukey's or Mood's median tests were selected depending on sample distribution with significance level set at 5%. RESULTS The instruments had similarities regarding their metal composition and unprepared canal area, whilst differences in phase transformation temperatures and geometric design (number of blades, surface finishing and tip geometry) were observed. Overall, no difference was observed regarding the maximum torque values (P > 0.05), whilst One Files (72 s) and One Files Blue (414 s) had the shortest and longest times to fracture, respectively (P < 0.05). Similar angles of rotation were observed in Reciproc (310°), One Files (285°) and Reverso Silver (318°) instruments (P > 0.05), which were significantly lower than Reciproc Blue (492°), One Files Blue (456°) and WaveOne Gold (492°; P < 0.05). Maximum bending load demonstrated that Reciproc Blue (201.3 gf) was significantly more flexible that the other instruments (P < 0.05). CONCLUSION Although there were similarities in metal composition and percentage of unprepared canal surface, the instruments had differences in the overall geometric design, phase transformation temperatures and in the four mechanical resistance parameters (time to fracture, maximum torque, angle of rotation and maximum bending load).
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Affiliation(s)
- J N R Martins
- Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal
| | - E J N L Silva
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil.,Department of Endodontics, Fluminense Federal University, Niteroi, Brazil
| | - D Marques
- Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,LIBPhys-FCT UID/FIS/04559/2013, Lisboa, Portugal
| | - F Belladonna
- Department of Endodontics, Fluminense Federal University, Niteroi, Brazil
| | - M Simões-Carvalho
- Department of Endodontics, Fluminense Federal University, Niteroi, Brazil
| | - V T L Vieira
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - H S Antunes
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - F M B Braz Fernandes
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - M A Versiani
- Dental Specialty Center, Brazilian Military Police, Minas Gerais, Brazil
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Silva EJNL, Lima CO, Barbosa AFA, Augusto CM, Souza EM, Lopes RT, De-Deus G, Versiani MA. Preserving dentine in minimally invasive access cavities does not strength fracture resistance of restored mandibular molars. Int Endod J 2021; 54:966-974. [PMID: 33527413 DOI: 10.1111/iej.13487] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 01/28/2021] [Accepted: 01/29/2021] [Indexed: 12/21/2022]
Abstract
AIM To evaluate the correlation between the volume of dental hard tissues removed and the fracture resistance of mandibular molar teeth with ultraconservative (UltraAC) or traditional (TradAC) access cavity preparations. METHODOLOGY Sixty recently extracted and intact mandibular first molars were scanned in a microcomputed tomographic (micro-CT) device, anatomically matched and assigned at random to 2 groups (n = 30), according to the access cavity type: UltraAC or TradAC. After access preparation, mesial and distal canals were prepared using Reciproc instruments and a new scan was taken. The volumes of pulp chamber and dental hard tissues in each specimen were measured before and after the experimental procedures, and the percentage volume reduction of hard tissues calculated for the entire tooth and for the crown separately. Teeth were then root filled, restored and subjected to fracture resistance tests in an universal testing machine. The force required to fracture was recorded in Newtons (N). The adherence of the variables to a Gaussian curve was verified using a Shapiro-Wilk test. Skewed data were analysed with nonparametric Wilcoxon signed rank or Spearman correlation tests, whilst the normally distributed data were analysed with a dependent samples Student t-test. Level of significance was set at 5%. RESULTS Pre-operatively, no difference was observed between groups regarding the volume of pulp canal space or dental hard tissues (P > 0.05). After access preparation, volumes of the removed hard tissues from the entire tooth and from the crown were significantly greater in teeth prepared with TradAC than with UltraAC (P < 0.05). No significant difference was observed in the fracture resistance values between TradAC (902.9 ± 347.8 N) and UltraAC (948.7 ± 405.7 N) groups (P = 0.975). The Spearman test was unable to identify a correlation between fracture resistance and percentage volume of removed dental hard tissues in the entire root (P = 0.525, r = -0.084) or only in the crown (P = 0.152, r = -0.187). CONCLUSION The volume of hard dental tissues removed, although greater in teeth with TradAC compared to UltraAC, did not correlate with the fracture resistance results, indicating that a minimally invasive access cavity did not increase the resistance of restored mandibular first molars to fracture.
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Affiliation(s)
- E J N L Silva
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil.,Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | - C O Lima
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - A F A Barbosa
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - C M Augusto
- Department of Endodontics, School of Dentistry, State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil
| | - E M Souza
- Department of Dentistry II, Federal University of Maranhao, São Luis, Brazil
| | - R T Lopes
- Nuclear Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - G De-Deus
- Department of Endodontics, School of Dentistry, Fluminense Federal University (UFF), Niterói, Brazil
| | - M A Versiani
- Oral Health Center, Brazilian Military Police, Minas Gerais, Brazil
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Affiliation(s)
- E J N L Silva
- Department of Endodontics, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil.,Department of Endodontics, Fluminense Federal University (UFF), Niterói, Brazil
| | - M A Versiani
- Dental Specialty Centre, Brazilian Military Police, Minas Gerais, Brazil
| | - E M Souza
- Department of Dentistry II, Federal University of Maranhão, São Luís, Maranhão, Brazil
| | - G De-Deus
- Department of Endodontics, Fluminense Federal University (UFF), Niterói, Brazil
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Martins JNR, Silva EJNL, Marques D, Belladonna F, Simões-Carvalho M, Camacho E, Braz Fernandes FM, Versiani MA. Comparison of design, metallurgy, mechanical performance and shaping ability of replica-like and counterfeit instruments of the ProTaper Next system. Int Endod J 2021; 54:780-792. [PMID: 33300121 DOI: 10.1111/iej.13463] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Revised: 12/06/2020] [Accepted: 12/07/2020] [Indexed: 11/30/2022]
Abstract
AIM To compare the ProTaper Next (PTN) system with a replica-like and a counterfeit system regarding design, metallurgy, mechanical performance and shaping ability. METHODOLOGY Replica-like (X-File) and counterfeit (PTN-CF) instruments were compared to the PTN system regarding design (microscopy), phase transformation temperatures (differential scanning calorimetry), nickel-titanium ratio (energy-dispersive X-ray spectroscopy), cyclic fatigue, torsional resistance, bending strength, and untouched canal areas in extracted mandibular molars (micro-CT). anova, post hoc Tukey's and Kruskal-Wallis tests were used according to normality assessment (Shapiro-Wilk test) with the significance level set at 5%. RESULTS Overall similarities in design and nickel-titanium (Ni/Ti) ratio were observed amongst instruments with the X-File having a smoother surface finish. PTN and PTN-CF had mixed austenite plus R-phase (R-phase start approximately at 45 ºC and near 30 ºC, respectively), whilst X-File instruments were austenitic (R-phase started at approximately at 17 ºC) at room temperature (20 ºC). PTN-CF had the greatest inconsistency in the phase transformation temperatures. Time to fracture of PTN-CF X2 and X3 was significantly shorter than PTN and X-File instruments (P < 0.05), whilst no difference was noted in maximum torque to fracture amongst the tested systems (P > 0.05). X-Files and PTN-CF had a stress-induced phase change during bending load. Mean unprepared surface areas of root canals were 25.8% (PTN), 31.1% (X-File) and 32.5% (PTN-CF) with no significant difference amongst groups (P > 0.05). CONCLUSION Similarities amongst the systems were noted in the Ni/Ti ratio and maximum torque to fracture, whilst differences were observed in the design, phase transformation temperatures and mechanical behaviour. The ProTaper Next counterfeit instruments could be considered as the less secure system considering its low-cyclic fatigue resistance. Apart from these differences, the unprepared canal surface areas, obtained with the tested systems, were similar.
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Affiliation(s)
- J N R Martins
- Department of Endodontics, Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,Unidade de Investigação em Ciências Orais e Biomédicas (UICOB), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal
| | - E J N L Silva
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil.,Department of Endodontics, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil
| | - D Marques
- Centro de Estudo de Medicina Dentária Baseada na Evidência (CEMDBE), Faculdade de Medicina Dentária, Universidade de Lisboa, Lisbon, Portugal.,LIBPhys-FCT UID/FIS/04559/2013, Lisboa, Portugal
| | - F Belladonna
- Department of Endodontics, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil
| | - M Simões-Carvalho
- Department of Endodontics, Fluminense Federal University, Niteroi, Rio de Janeiro, Brazil
| | - E Camacho
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - F M Braz Fernandes
- CENIMAT/I3N, Department of Materials Science, NOVA School of Science and Technology, Universidade NOVA de Lisboa, Caparica, Portugal
| | - M A Versiani
- Dental Specialty Center, Brazilian Military Police, Minas Gerais, Brazil
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Aksoy U, Küçük M, Versiani MA, Orhan K. Publication trends in micro-CT endodontic research: a bibliometric analysis over a 25-year period. Int Endod J 2020; 54:343-353. [PMID: 33075147 DOI: 10.1111/iej.13433] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 10/09/2020] [Accepted: 10/13/2020] [Indexed: 12/21/2022]
Abstract
AIM To conduct a bibliographic analysis of the research studies published in Endodontics using micro-computed tomography (micro-CT) as an analytical tool over a 25-year period. METHODOLOGY The Web of Science electronic database was accessed, and an advanced search using strict criteria was undertaken from January 1995 to June 2020 for studies in the field of Endodontics that used micro-CT as an analytical tool. A further search was conducted between January and August of 2020 for a combination of specific terms and descriptors. For each selected article, the following parameters were recorded: field of the study, analysed specimen, publication title and year, authorship, journal of publication, institution and country of origin, collaborating institutions and countries, and number of citations. The acquired data were analysed using descriptive statistics and graphical mappings. RESULTS The screening process identified 877 relevant articles that were classified into 30 thematic categories. The main fields of research were root canal preparation (23.8%), root canal anatomy (17.4%), canal filling (9.2%) and root canal retreatment (7.0%). The most productive half-decade comprised the period of 2015-2019 (n = 513; 58.5%), with the highest number of articles published in 2019 (n = 146; 16.6%). The authors who lead the list as first authors were G De-Deus, A Keleş, F Paqué, MA Versiani and Y Gu, respectively, whilst Versiani was the most productive (n = 51). The leading countries regarding the number of studies were Brazil, China and Turkey with 236, 130 and 65 publications, respectively. The University of São Paulo (n = 90; 10.3%) followed by Wuhan University (n = 37; 4.2%) and the University of Zurich (n = 18; 2.1%) were the prominent contributors by producing the largest number of articles, whilst the University of Zurich was the most-cited institution. The selected studies were published in 140 scientific journals, but the Journal of Endodontics and International Endodontic Journal accounted for almost 50% of the publications. CONCLUSION This bibliometric analysis portrayed an original and comprehensive view on the progress and trends of the use of micro-CT technology in endodontic research, and enabled a deep understanding of the development process in this field over the last 25 years.
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Affiliation(s)
- U Aksoy
- Department of Endodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - M Küçük
- Department of Endodontics, Faculty of Dentistry, Near East University, Mersin, Turkey
| | - M A Versiani
- Dental Specialty Centre, Brazilian Military Police, Minas Gerais, Brazil
| | - K Orhan
- Department of Maxillofacial Radiology, Faculty of Dentistry, Ankara University, Ankara, Turkey.,Medical Design Application and Research Center (MEDITAM), Ankara University, Ankara, Turkey
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De-Deus G, Belladonna FG, Cavalcante DM, Simões-Carvalho M, Silva EJNL, Carvalhal JCA, Zamolyi RQ, Lopes RT, Versiani MA, Dummer PMH, Zehnder M. Contrast-enhanced micro-CT to assess dental pulp tissue debridement in root canals of extracted teeth: a series of cascading experiments towards method validation. Int Endod J 2020; 54:279-293. [PMID: 32920829 DOI: 10.1111/iej.13408] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2020] [Revised: 09/02/2020] [Accepted: 09/03/2020] [Indexed: 12/15/2022]
Abstract
AIM To validate a new method for the evaluation of pulp tissue debridement in the root canals of extracted teeth using an impregnation protocol involving potassium triiodide, a radiocontrast solution known as Lugol's, combined with micro-computed tomographic (micro-CT) imaging. METHODOLOGY The impact of NaOCl on the radiopacity of Lugol's solution was assessed using a two-fold dilution series of Lugol in distilled water and 5.25% NaOCl, which were then pipetted into transparent dishes and radiographed. To verify the influence of Lugol on the proteolytic effect of NaOCl, a dissolution test was performed using fresh bovine meat. Ten slices did not undergo any tissue processing, whilst twenty slices were fixed in formaldehyde for 24 h. After that, 10 of them were immersed in Lugol for another 24 h. Then, all specimens were placed in NaOCl and the time required for a complete tissue dissolution was recorded. For the last experiments (histological validation and micro-CT assessment), 8 extracted mandibular premolars with formerly vital pulps were immersed in buffered formalin, scanned in a micro-CT device, accessed, immersed in Lugol for 7 days and scanned again. Then, the root canals of 5 teeth were prepared and scanned, and the volume of remaining pulp tissue identified and quantified, whilst 3 teeth were histologically processed. The same specimens were subjected to histological assessment, and the images of the histologic sections were registered with the corresponding micro-CT images to verify whether the pulp tissue in the histological sections matched its counterpart in the Lugol-impregnated tissues identified in the micro-CT slices. RESULTS There was no discernible effect on radiopacity when NaOCl was mixed with Lugol's solution. Tissue processing did not affect the time required for the complete dissolution of fresh bovine meat. Histological evaluation revealed a correlation between micro-CT and histological images confirming the identification of Lugol-impregnated pulp tissue in micro-CT images. CONCLUSIONS The radiocontrast Lugol's solution was unaffected by NaOCl and did not interfere with its soft tissue dissolution capability. The impregnation protocol using Lugol's solution allowed the visualization of pulp tissue on the micro-CT images and the identification of pulp remnants after chemical-mechanical canal procedures.
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Affiliation(s)
- G De-Deus
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - F G Belladonna
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - D M Cavalcante
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - M Simões-Carvalho
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - E J N L Silva
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil.,Department of Endodontics, Grande Rio University, Duque de Caxias, Rio de Janeiro, Brazil
| | - J C A Carvalhal
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - R Q Zamolyi
- Bonsucesso Federal Hospital, Rio de Janeiro, Rio de Janeiro, Brazil
| | - R T Lopes
- Nuclear Engineering Program, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - M A Versiani
- Department of Endodontics, Fluminense Federal University, Niterói, Rio de Janeiro, Brazil
| | - P M H Dummer
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - M Zehnder
- Division of Endodontology, Clinic of Conservative and Preventive Dentistry, University of Zurich, Zurich, Switzerland
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Silva EJNL, Pinto KP, Ferreira CM, Belladonna FG, De-Deus G, Dummer PMH, Versiani MA. Current status on minimal access cavity preparations: a critical analysis and a proposal for a universal nomenclature. Int Endod J 2020; 53:1618-1635. [PMID: 32854167 DOI: 10.1111/iej.13391] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Revised: 08/17/2020] [Accepted: 08/19/2020] [Indexed: 12/14/2022]
Abstract
In the last decade, several access cavity designs involveing minimal removal of tooth tissue have been described for gaining entry to pulp chambers during root canal treatment. The premise behind this concept assumes that maximum preservation of as much of the pulp chamber roof as possible during access preparation would maintain the fracture resistance of teeth following root canal treatment. However, the smaller the access cavity, the more difficult it may be to visualize and debride the pulp chamber as well as locate, shape, clean and fill the canals. At the same time, a small access cavity may increase the risk of iatrogenic complications as a result of poor visibility, which may have an impact on treatment outcome. This study aimed to critically analyse the literature on minimal access cavity preparations, propose new nomenclature based on self-explanatory abbreviations and highlight the areas in which more research is required. The search was conducted without restrictions using specifics terms and descriptors in four databases. A complementary screening of the references within the selected studies, as well as a manual search in the highest impact journals in endodontics, namely International Endodontic Journal and Journal of Endodontics, was also performed. The initial search retrieved 1831 publications. The titles and abstracts of these papers were reviewed, and the full text of 94 studies was assessed. Finally, a total of 28 studies were identified as evaluating the influence of minimally invasive access cavity designs on the fracture resistance of teeth and on the different stages of root canal treatment (orifice location, canal shaping, canal cleaning, canal filling and retreatment). Overall, the studies had major methodological drawbacks and reported inadequate and/or inconclusive results on the utility of minimally invasive access preparations. Furthermore, they offered limited scientific evidence to support the use of minimally invasive access cavities to improve the outcome of root canal treatment and retreatment; they also provided little evidence that they preserved the fracture resistance of root filled teeth to a greater extent than traditional access cavity preparations. It was concluded that at present, there is a lack of supporting evidence for the introduction of minimally invasive access cavity preparation into routine clinical practice and/or training of undergraduate and postgraduate students.
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Affiliation(s)
- E J N L Silva
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, RJ, Brazil.,Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, RJ, Brazil.,Department of Endodontics, School of Dentistry, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - K P Pinto
- Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, RJ, Brazil
| | - C M Ferreira
- Department of Endodontics, School of Dentistry, Rio de Janeiro State University (UERJ), Rio de Janeiro, RJ, Brazil
| | - F G Belladonna
- Department of Endodontics, School of Dentistry, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - G De-Deus
- Department of Endodontics, School of Dentistry, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - P M H Dummer
- School of Dentistry, College of Biomedical and Life Sciences, Cardiff University, Cardiff, UK
| | - M A Versiani
- Department of Endodontics, School of Dentistry, Fluminense Federal University (UFF), Niterói, RJ, Brazil
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10
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De‐Deus G, Simões‐Carvalho M, Belladonna FG, Versiani MA, Silva EJNL, Cavalcante DM, Souza EM, Johnsen GF, Haugen HJ, Paciornik S. Creation of well‐balanced experimental groups for comparative endodontic laboratory studies: a new proposal based on micro‐CT and
in silico
methods. Int Endod J 2020; 53:974-985. [DOI: 10.1111/iej.13288] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2019] [Accepted: 03/09/2020] [Indexed: 11/28/2022]
Affiliation(s)
- G. De‐Deus
- Department of Endodontics Universidade Federal Fluminense NiteróiBrazil
| | | | - F. G. Belladonna
- Department of Endodontics Universidade Federal Fluminense NiteróiBrazil
| | - M. A. Versiani
- Department of Endodontics Universidade Federal Fluminense NiteróiBrazil
| | - E. J. N. L. Silva
- Department of Endodontics Grande Rio University Duque de Caxias Brazil
| | - D. M. Cavalcante
- Department of Endodontics Universidade Federal Fluminense NiteróiBrazil
| | - E. M. Souza
- Department of Dentistry II Federal University of Maranhão São Luís Brazil
| | - G. F. Johnsen
- Department of Biomaterial Faculty of Dentistry University of Oslo Oslo Norway
| | - H. J. Haugen
- Department of Biomaterial Faculty of Dentistry University of Oslo Oslo Norway
| | - S. Paciornik
- Department of Chemical and Materials Engineering Pontifícia Universidade Católica do Rio de Janeiro Rio de Janeiro Brazil
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11
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De‐Deus G, Cavalcante DM, Belladonna FG, Carvalhal J, Souza EM, Lopes RT, Versiani MA, Silva EJNL, Dummer PMH. Root dentinal microcracks: a post‐extraction experimental phenomenon? Int Endod J 2019; 53:137-142. [DOI: 10.1111/iej.13208] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- G. De‐Deus
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - D. M. Cavalcante
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - F. G. Belladonna
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - J. Carvalhal
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Dentistry II Federal University of Maranhão São Luís Brazil
| | - R. T. Lopes
- Nuclear Engineering Program Federal University of Rio de Janeiro Rio de Janeiro Brazil
| | - M. A. Versiani
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - E. J. N. L. Silva
- Department of Endodontics Fluminense Federal University Niterói, Rio de Janeiro Brazil
| | - P. M. H. Dummer
- School of Dentistry College of Biomedical and Life Sciences Cardiff University Cardiff UK
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12
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Keles A, Keskin C, Alqawasmi R, Versiani MA. Evaluation of dentine thickness of middle mesial canals of mandibular molars prepared with rotary instruments: a micro‐CT study. Int Endod J 2019; 53:519-528. [DOI: 10.1111/iej.13247] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Revised: 11/07/2019] [Accepted: 11/07/2019] [Indexed: 12/18/2022]
Affiliation(s)
- A. Keles
- Department of Endodontics Faculty of Dentistry Ondokuz Mayıs University Samsun Samsun Turkey
| | - C. Keskin
- Department of Endodontics Faculty of Dentistry Ondokuz Mayıs University Samsun Samsun Turkey
| | - R. Alqawasmi
- Department of Endodontics Faculty of Dentistry Ondokuz Mayıs University Samsun Samsun Turkey
| | - M. A. Versiani
- Dental Specialty Center Brazilian Military Police Minas Gerais Brazil
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13
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Martins JNR, Marques D, Silva EJNL, Caramês J, Mata A, Versiani MA. Prevalence of C‐shaped canal morphology using cone beam computed tomography – a systematic review with meta‐analysis. Int Endod J 2019; 52:1556-1572. [DOI: 10.1111/iej.13169] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 06/13/2019] [Indexed: 11/29/2022]
Affiliation(s)
- J. N. R. Martins
- Faculdade de Medicina Dentária Universidade de Lisboa Lisboa
- Instituto de Implantologia LisboaPortugal
| | - D. Marques
- Faculdade de Medicina Dentária Universidade de Lisboa Lisboa
- Instituto de Implantologia LisboaPortugal
- LIBPhys‐FCT UID/FIS/04559/2013 Lisboa Portugal
| | - E. J. N. L. Silva
- Department of Endodontics School of Dentistry Grande Rio University Rio de JaneiroBrazil
| | - J. Caramês
- Faculdade de Medicina Dentária Universidade de Lisboa Lisboa
- Instituto de Implantologia LisboaPortugal
- LIBPhys‐FCT UID/FIS/04559/2013 Lisboa Portugal
| | - A. Mata
- Faculdade de Medicina Dentária Universidade de Lisboa Lisboa
- LIBPhys‐FCT UID/FIS/04559/2013 Lisboa Portugal
| | - M. A. Versiani
- Dental Specialty Center Brazilian Military Police Minas Gerais Brazil
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14
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De‐Deus G, Rodrigues EA, Belladonna FG, Simões‐Carvalho M, Cavalcante DM, Oliveira DS, Souza EM, Giorgi KA, Versiani MA, Lopes RT, Silva EJNL, Paciornik S. Anatomical danger zone reconsidered: a micro‐
CT
study on dentine thickness in mandibular molars. Int Endod J 2019; 52:1501-1507. [DOI: 10.1111/iej.13141] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 05/03/2019] [Indexed: 12/17/2022]
Affiliation(s)
- G. De‐Deus
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - E. A. Rodrigues
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - F. G. Belladonna
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - M. Simões‐Carvalho
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - D. M. Cavalcante
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - D. S. Oliveira
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Dentistry II Federal University of Maranhão São Luís MaranhãoBrazil
| | - K. A. Giorgi
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - M. A. Versiani
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
| | - R. T. Lopes
- Nuclear Engineering Program Federal University of Rio de Janeiro Rio de Janeiro Rio de JaneiroBrazil
| | - E. J. N. L. Silva
- Department of Endodontics Fluminense Federal University Niterói Rio de Janeiro Brazil
- Department of Endodontics Grande Rio University Duque de Caxias Rio de JaneiroBrazil
| | - S. Paciornik
- Department of Chemical and Materials Engineering Pontifícia Universidade Católica do Rio de Janeiro Rio de Janeiro Rio de JaneiroBrazil
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15
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De‐Deus G, Cavalcante DM, Belladonna FG, Carvalhal J, Souza EM, Lopes RT, Versiani MA, Silva EJNL, Dummer PMH. Root dentinal microcracks: a post‐extraction experimental phenomenon? Int Endod J 2018; 52:857-865. [DOI: 10.1111/iej.13058] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 12/08/2018] [Indexed: 11/29/2022]
Affiliation(s)
- G. De‐Deus
- Department of Endodontics Fluminense Federal University Niterói Rio de JaneiroBrazil
| | - D. M. Cavalcante
- Department of Endodontics Fluminense Federal University Niterói Rio de JaneiroBrazil
| | - F. G. Belladonna
- Department of Endodontics Fluminense Federal University Niterói Rio de JaneiroBrazil
| | - J. Carvalhal
- Department of Endodontics Fluminense Federal University Niterói Rio de JaneiroBrazil
| | - E. M. Souza
- Department of Dentistry II Federal University of Maranhão São Luís MaranhãoBrazil
| | - R. T. Lopes
- Nuclear Engineering Program Federal University of Rio de Janeiro Rio de JaneiroBrazil
| | - M. A. Versiani
- Department of Endodontics Fluminense Federal University Niterói Rio de JaneiroBrazil
| | - E. J. N. L. Silva
- Department of Endodontics Grande Rio University Duque de Caxias Rio de Janeiro Brazil
| | - P. M. H. Dummer
- School of Dentistry College of Biomedical and Life Sciences Cardiff University Cardiff UK
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16
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Ordinola-Zapata R, Martins JNR, Versiani MA, Bramante CM. Micro-CT analysis of danger zone thickness in the mesiobuccal roots of maxillary first molars. Int Endod J 2018; 52:524-529. [DOI: 10.1111/iej.13025] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2018] [Accepted: 10/03/2018] [Indexed: 12/14/2022]
Affiliation(s)
- R. Ordinola-Zapata
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
- Bender Division of Endodontics; Albert Einstein Medical Center; Philadelphia PA USA
| | - J. N. R. Martins
- Department of Endodontics; Faculdade de Medicina Dentária; Universidade de Lisboa; Lisbon Portugal
| | - M. A. Versiani
- Department of Endodontics; Ribeirão Preto Dental School; University of São Paulo; Ribeirão Preto Brazil
| | - C. M. Bramante
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
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17
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Ahmed HMA, Versiani MA, De-Deus G, Dummer PMH. Reply to the editor. Int Endod J 2018; 51:1182-1183. [DOI: 10.1111/iej.12928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- H. M. A. Ahmed
- Department of Restorative Dentistry; Faculty of Dentistry; University of Malaysia; Kuala Lumpur Malaysia
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto Brazil
| | - G. De-Deus
- Department of Endodontics; School of Dentistry; Federal Fluminense University; Niterói Brazil
| | - P. M. H. Dummer
- School of Dentistry; College of Biomedical and Life Sciences; Cardiff University; Cardiff UK
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18
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Zuolo ML, Zaia AA, Belladonna FG, Silva EJNL, Souza EM, Versiani MA, Lopes RT, De-Deus G. Micro-CT assessment of the shaping ability of four root canal instrumentation systems in oval-shaped canals. Int Endod J 2017; 51:564-571. [DOI: 10.1111/iej.12810] [Citation(s) in RCA: 61] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 06/27/2017] [Indexed: 11/29/2022]
Affiliation(s)
- M. L. Zuolo
- Endodontic Division; Department of Restorative Dentistry; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - A. A. Zaia
- Endodontic Division; Department of Restorative Dentistry; Piracicaba Dental School; State University of Campinas; Piracicaba São Paulo Brazil
| | - F. G. Belladonna
- Department of Endodontics; Fluminense Federal University; Niterói Rio de Janeiro Brazil
| | - E. J. N. L. Silva
- Department of Endodontics; Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Dentistry II; Federal University of Maranhão; São Luís Maranhão Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo São Paulo Brazil
| | - R. T. Lopes
- Nuclear Engineering Program; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - G. De-Deus
- Department of Endodontics; Fluminense Federal University; Niterói Rio de Janeiro Brazil
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19
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Ordinola-Zapata R, Martins JNR, Bramante CM, Villas-Boas MH, Duarte MH, Versiani MA. Morphological evaluation of maxillary second molars with fused roots: a micro-CT study. Int Endod J 2017; 50:1192-1200. [DOI: 10.1111/iej.12752] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 02/09/2017] [Indexed: 11/27/2022]
Affiliation(s)
- R. Ordinola-Zapata
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
- Bender Division of Endodontics; Albert Einstein Medical Center; Philadelphia PA USA
| | - J. N. R. Martins
- Department of Endodontics; Faculdade de Medicina Dentária da Universidade de Lisboa; Lisboa Portugal
| | - C. M. Bramante
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - M. H. Villas-Boas
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - M. H. Duarte
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; Ribeirão Preto Dental School; University of São Paulo; Ribeirão Preto Brazil
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20
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De-Deus G, Belladonna FG, Silva EJNL, Souza EM, Carvalhal JCA, Perez R, Lopes RT, Versiani MA. Micro-CT assessment of dentinal micro-cracks after root canal filling procedures. Int Endod J 2016; 50:895-901. [PMID: 27689844 DOI: 10.1111/iej.12706] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 09/27/2016] [Indexed: 11/30/2022]
Abstract
AIM To evaluate the frequency of dentinal micro-cracks after root canal filling procedures with GuttaCore (GC), cold lateral compaction (CLC) and warm vertical compaction (WVC) techniques in mandibular molars using micro-computed tomographic analysis. METHODOLOGY Thirty mesial roots of mandibular molars, with a type II Vertucci's canal configuration, were prepared to working length with a Reciproc R40 instrument and randomly assigned to one of the three experimental groups (n = 10), according to the technique used for root filling: GC, CLC or WVC. The GC group was filled with a size 40 GC obturator, whilst CLC and WVC groups used conventional gutta-percha cones. AH Plus sealer was used in all groups. The specimens were scanned at an isotropic resolution of 14.25 μm before and after root canal preparation and after root filling. Then, all pre- and postoperative cross-sectional images of the roots (n = 41 660) were screened to identify the presence of dentinal defects. RESULTS Overall, 30.75% (n = 12 810) of the pre- + post-filling images displayed dentinal defects. In the GC, CLC and WVC groups, dentinal micro-cracks were observed in 18.68% (n = 2510), 15.99% (n = 2389) and 11.34% (n = 1506) of the cross-sectional images, respectively. All micro-cracks identified in the post-filling scans were also observed in the corresponding post-preparation images. CONCLUSION Root fillings in all techniques did not induce the development of new dentinal micro-cracks.
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Affiliation(s)
- G De-Deus
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, RJ, Brazil
| | - F G Belladonna
- Department of Endodontics, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - E J N L Silva
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, RJ, Brazil
| | - E M Souza
- Department of Dentistry II, Federal University of Maranhão (UFMA), São Luís, MA, Brazil
| | - J C A Carvalhal
- Department of Endodontics, School of Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, RJ, Brazil
| | - R Perez
- Department of Endodontics, Fluminense Federal University (UFF), Niterói, RJ, Brazil
| | - R T Lopes
- Nuclear Engineering Program, Federal University of Rio de Janeiro (UFRJ), Rio de Janeiro, RJ, Brazil
| | - M A Versiani
- Department of Restorative Dentistry, Dental School of Ribeirão Preto, University of São Paulo (USP), Ribeirão Preto, SP, Brazil
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21
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Ahmed HMA, Versiani MA, De-Deus G, Dummer PMH. A new system for classifying root and root canal morphology. Int Endod J 2016; 50:761-770. [DOI: 10.1111/iej.12685] [Citation(s) in RCA: 116] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 08/29/2016] [Indexed: 01/09/2023]
Affiliation(s)
- H. M. A. Ahmed
- Department of Conservative Dentistry; School of Dental Sciences; Universiti Sains Malaysia; Kelantan Malaysia
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo Brazil
| | - G. De-Deus
- Department of Endodontics; School of Dentistry; Grande Rio University (UNIGRANRIO); Rio de Janeiro Brazil
| | - P. M. H. Dummer
- School of Dentistry; College of Biomedical and Life Sciences; Cardiff University; Cardiff UK
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22
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Perez R, Neves AA, Belladonna FG, Silva EJNL, Souza EM, Fidel S, Versiani MA, Lima I, Carvalho C, De-Deus G. Impact of needle insertion depth on the removal of hard-tissue debris. Int Endod J 2016; 50:560-568. [DOI: 10.1111/iej.12648] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Accepted: 04/07/2016] [Indexed: 12/01/2022]
Affiliation(s)
- R. Perez
- Department of Dental Clinics; Rio de Janeiro State University; Rio de Janeiro Brazil
| | - A. A. Neves
- Department of Pediatric Dentistry and Orthodontics; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - F. G. Belladonna
- Department of Endodontics; Fluminense Federal University; Niterói Rio de Janeiro Brazil
| | - E. J. N. L. Silva
- Department of Endodontics; Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Dentistry II; Federal University of Maranhão; São Luís Maranhão Brazil
| | - S. Fidel
- Department of Dental Clinics; Rio de Janeiro State University; Rio de Janeiro Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo Brazil
| | - I. Lima
- Nuclear Engineering Program; Federal University of Rio de Janeiro; Rio de Janeiro Brazil
| | - C. Carvalho
- Department of Endodontics; Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
| | - G. De-Deus
- Department of Endodontics; Grande Rio University; Duque de Caxias Rio de Janeiro Brazil
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23
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Leoni GB, Versiani MA, Silva-Sousa YT, Bruniera JFB, Pécora JD, Sousa-Neto MD. Ex vivoevaluation of four final irrigation protocols on the removal of hard-tissue debris from the mesial root canal system of mandibular first molars. Int Endod J 2016; 50:398-406. [DOI: 10.1111/iej.12630] [Citation(s) in RCA: 95] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2016] [Accepted: 03/15/2016] [Indexed: 11/29/2022]
Affiliation(s)
- G. B. Leoni
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - Y. T. Silva-Sousa
- Department of Endodontics; Faculty of Dentistry; University of Ribeirão Preto; Ribeirão Preto SP Brazil
| | - J. F. B. Bruniera
- Department of Endodontics; Faculty of Dentistry; University of Ribeirão Preto; Ribeirão Preto SP Brazil
| | - J. D. Pécora
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - M. D. Sousa-Neto
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
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24
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Ordinola-Zapata R, Bramante CM, Versiani MA, Moldauer BI, Topham G, Gutmann JL, Nuñez A, Duarte MAH, Abella F. Comparative accuracy of the Clearing Technique, CBCT and Micro-CT methods in studying the mesial root canal configuration of mandibular first molars. Int Endod J 2016; 50:90-96. [PMID: 26659613 DOI: 10.1111/iej.12593] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2015] [Accepted: 12/02/2015] [Indexed: 11/30/2022]
Abstract
AIMS To compare the accuracy of the clearing technique and cone beam computed tomography (CBCT) in the assessment of root canal configurations using micro-computed tomography (micro-CT) imaging system as the reference standard. METHODOLOGY Thirty-two mesial roots of mandibular first molars, selected on the basis of micro-CT scans (voxel size: 19.6 μm) and presenting several canal configurations, were evaluated using 2 CBCT scanners (voxels sizes: 120 μm and 150 μm) followed by the clearing technique. Two examiners analysed the data from each method and classified the anatomical configuration of the mesial canal according to Vertucci's system. Data were compared using Fisher's exact and chi-square tests. Reliability for each assessment was verified by the kappa test, and significance level was set at 5%. RESULTS Kappa value indicated a high level of agreement between the examiners. Detection of type I configurations was significantly lower in cleared teeth (P < 0.05), whilst type II root canals were detected in all specimens by both tests (P > 0.05). In mesial roots with variable anatomical configurations, CBCT and the clearing method were significantly less accurate than the reference standard (P < 0.05). CONCLUSION Within the tooth population studied, accuracy of identifying mesial root canal configuration was influenced greatly by the evaluation method and the type of anatomy. Detection of type I configurations in cleared teeth was significantly lower, whilst type II configurations were detected in all specimens by both methods. In mesial roots with variable anatomical configurations, neither CBCT nor clearing methods were accurate for detecting the actual root canal anatomy.
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Affiliation(s)
- R Ordinola-Zapata
- Department of Endodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil.,Advanced Education in General Dentistry Program, Larkin Community Hospital, Miami, FL, USA
| | - C M Bramante
- Department of Endodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - M A Versiani
- Department of Endodontics, Ribeirão Preto Dental School, University of São Paulo, Ribeirão Preto, Brazil
| | - B I Moldauer
- Advanced Education in General Dentistry Program, Larkin Community Hospital, Miami, FL, USA
| | - G Topham
- Department of Endodontics, Universitat Internacional de Cataluña, Barcelona, Spain
| | - J L Gutmann
- Department of Endodontics, Baylor College of Dentistry, Texas A&M University System Health Science Center, Dallas, TX, USA
| | - A Nuñez
- Department of Endodontics, Universitat Internacional de Cataluña, Barcelona, Spain
| | - M A Hungaro Duarte
- Department of Endodontics, Bauru Dental School, University of São Paulo, Bauru, Brazil
| | - F Abella
- Department of Endodontics, Universitat Internacional de Cataluña, Barcelona, Spain
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25
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De-Deus G, Belladonna FG, Silva EJNL, Souza EM, Versiani MA. Critical appraisal of some methodological aspects of using micro-CT technology in the study of dentinal microcracks in endodontics. Int Endod J 2016; 49:216-9. [DOI: 10.1111/iej.12570] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- G. De-Deus
- Department of Endodontics; Grande Rio University (UNIGRANRIO); Rio de Janeiro Brazil
| | - F. G. Belladonna
- Department of Endodontics; Fluminense Federal University (UFF); Niterói Brazil
| | - E. J. N. L. Silva
- Department of Endodontics; Grande Rio University (UNIGRANRIO); Rio de Janeiro Brazil
| | - E. M. Souza
- Department of Dentistry II; Federal University of Maranhão (UFMA); São Luiz Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; University of São Paulo (USP); Ribeirão Preto Brazil
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Versiani MA, Alves FRF, Andrade-Junior CV, Marceliano-Alves MF, Provenzano JC, Rôças IN, Sousa-Neto MD, Siqueira JF. Micro-CT evaluation of the efficacy of hard-tissue removal from the root canal and isthmus area by positive and negative pressure irrigation systems. Int Endod J 2015; 49:1079-1087. [DOI: 10.1111/iej.12559] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 10/08/2015] [Indexed: 11/30/2022]
Affiliation(s)
- M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - F. R. F. Alves
- Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - C. V. Andrade-Junior
- Department of Health; Dentistry Division; Southwest State University of Bahia; Jequié Brazil
| | - M. F. Marceliano-Alves
- Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - J. C. Provenzano
- Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - I. N. Rôças
- Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
| | - M. D. Sousa-Neto
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; Ribeirão Preto SP Brazil
| | - J. F. Siqueira
- Department of Endodontics; Faculty of Dentistry; Estácio de Sá University; Rio de Janeiro RJ Brazil
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Marceliano-Alves MFV, Sousa-Neto MD, Fidel SR, Steier L, Robinson JP, Pécora JD, Versiani MA. Shaping ability of single-file reciprocating and heat-treated multifile rotary systems: a micro-CT study. Int Endod J 2014; 48:1129-36. [DOI: 10.1111/iej.12412] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2014] [Accepted: 11/12/2014] [Indexed: 11/30/2022]
Affiliation(s)
| | - M. D. Sousa-Neto
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo Brazil
| | - S. R. Fidel
- Proclin Department; School of Dentistry; Rio de Janeiro State University; Rio de Janeiro Brazil
| | - L. Steier
- Warwick Dentistry; The University of Warwick; Coventry UK
| | - J. P. Robinson
- Physical Sciences of Imaging in the Biomedical Sciences; University of Birmingham; Birmingham UK
| | - J. D. Pécora
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo Brazil
| | - M. A. Versiani
- Department of Restorative Dentistry; Dental School of Ribeirão Preto; University of São Paulo; São Paulo Brazil
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Ordinola-Zapata R, Monteiro Bramante C, Gagliardi Minotti P, Cavalini Cavenago B, Gutmann JL, Moldauer BI, Versiani MA, Hungaro Duarte MA. Micro-CT evaluation of C-shaped mandibular first premolars in a Brazilian subpopulation. Int Endod J 2014; 48:807-13. [DOI: 10.1111/iej.12380] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 09/17/2014] [Indexed: 11/29/2022]
Affiliation(s)
- R. Ordinola-Zapata
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - C. Monteiro Bramante
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - P. Gagliardi Minotti
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - B. Cavalini Cavenago
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
| | - J. L. Gutmann
- Department of Endodontics; Baylor College of Dentistry; Texas A&M University System Health Science Center; Dallas TX USA
| | - B. I. Moldauer
- Advanced Education in General Dentistry Program; Larkin Community Hospital; Miami FL USA
| | - M. A. Versiani
- Department of Endodontics; Ribeirão Preto Dental School; University of São Paulo; Ribeirão Preto Brazil
| | - M. A. Hungaro Duarte
- Department of Endodontics; Bauru Dental School; University of São Paulo; Bauru Brazil
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Keleş A, Alcin H, Kamalak A, Versiani MA. Micro-CT evaluation of root filling quality in oval-shaped canals. Int Endod J 2014; 47:1177-84. [PMID: 24527697 DOI: 10.1111/iej.12269] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2013] [Accepted: 02/08/2014] [Indexed: 12/01/2022]
Abstract
AIM To assess the percentage volumes of filling materials and voids in oval-shaped canals filled with either cold lateral compaction or warm compaction techniques, using micro-computed tomography (micro-CT). METHODOLOGY Twenty-four single-rooted maxillary premolar teeth with oval-shaped canals were selected and the root canals prepared and assigned to two groups (n = 12), according to the filling technique: cold lateral compaction (CLC) or warm vertical compaction (WVC). Each specimen was scanned using a micro-CT device at an isotropic resolution of 12.5 μm. Percentage volumes of root filling materials and voids were calculated, and data were statistically analysed using Student's t-test and Friedman's test, with a significance level of 5%. RESULTS Overall, mean percentage volumes of gutta-percha, sealer and voids were 82.33 ± 3.14, 13.42 ± 2.91 and 4.26 ± 0.74 in the CLC group and 91.73 ± 4.48, 7.70 ± 4.44 and 0.57 ± 0.44 in the WVC group, respectively, with a statistically significant difference between groups (P < 0.05). At the apical level, differences in the percentage volumes of filling materials and voids between groups were not significant (P > 0.05). CONCLUSIONS No root fillings were void free. Warm vertical compaction produced a significantly greater volume of gutta-percha and a significantly lower percentage of voids than those achieved with cold lateral compaction. Distribution of sealer and voids within the root canal space after root filling was unpredictable, irrespective of the technique used.
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Affiliation(s)
- A Keleş
- Department of Endodontics, Faculty of Dentistry, İnönü University, Malatya, Turkey
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30
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Versiani MA, Cristescu RC, Saquy PC, Pécora JD, de Sousa-Neto MD. Enamel pearls in permanent dentition: case report and micro-CT evaluation. Dentomaxillofac Radiol 2013; 42:20120332. [PMID: 23520396 DOI: 10.1259/dmfr.20120332] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES To investigate the frequency, position, number and morphology of enamel pearls (EPs) using micro-CT (µCT) and to report a case of an EP mimicking an endodontic-periodontic lesion. METHODS Cone beam CT (CBCT) was performed in a patient to evaluate a radio-opaque nodule observed on the left maxillary first molar during the radiographic examination. Additionally, 23 EPs were evaluated regarding frequency, position, number and morphology by means of µCT. The results were statistically compared using the Student's t-test for independent samples. RESULTS 1 pearl was presented in 13 specimens, while 5 specimens presented 2 pearls. The most frequent location of the EPs was the furcation between the disto-buccal and the palatal roots of the maxillary molars. Overall, the mean major diameter, volume and surface area were 1.98 ± 0.85 mm, 1.76 ± 1.36 mm³ and 11.40 ± 7.59 mm², respectively, with no statistical difference between maxillary second and third molars (p > 0.05). In the case report, CBCT revealed an EP between the disto-buccal and the palatal roots of the maxillary first left molar associated with advanced localized periodontitis. The tooth was referred for extraction. CONCLUSIONS EPs, located generally in the furcation area, were observed in 0.74% of the sample. The majority was an enamel-dentin pearl type and no difference was found in maxillary second and third molars regarding diameter, volume and surface area of the pearls. In this report, the EP mimicked an endodontic-periodontic lesion and was a secondary aetiological factor in the periodontal breakdown.
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Affiliation(s)
- M A Versiani
- Department of Restorative Dentistry, School of Dentistry, University of São Paulo, Ribeirão Preto, Brasil
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Versiani MA, Pécora JD, Sousa-Neto MD. Microcomputed tomography analysis of the root canal morphology of single-rooted mandibular canines. Int Endod J 2013; 46:800-7. [DOI: 10.1111/iej.12061] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 01/01/2013] [Indexed: 11/28/2022]
Affiliation(s)
- M. A. Versiani
- Department of Restorative Dentistry, Faculty of Dentistry; University of São Paulo; Ribeirão Preto; Brazil
| | - J. D. Pécora
- Department of Restorative Dentistry, Faculty of Dentistry; University of São Paulo; Ribeirão Preto; Brazil
| | - M. D. Sousa-Neto
- Department of Restorative Dentistry, Faculty of Dentistry; University of São Paulo; Ribeirão Preto; Brazil
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32
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Borges RP, Sousa-Neto MD, Versiani MA, Rached-Júnior FA, De-Deus G, Miranda CES, Pécora JD. Changes in the surface of four calcium silicate-containing endodontic materials and an epoxy resin-based sealer after a solubility test. Int Endod J 2011; 45:419-28. [PMID: 22150403 DOI: 10.1111/j.1365-2591.2011.01992.x] [Citation(s) in RCA: 121] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM To compare the changes in the surface structure and elemental distribution, as well as the percentage of ion release, of four calcium silicate-containing endodontic materials with a well-established epoxy resin-based sealer, submitted to a solubility test. METHODOLOGY Solubility of AH Plus, iRoot SP, MTA Fillapex, Sealapex and MTA-Angelus (MTA-A) was tested according to ANSI/ADA Specification 57. The deionized water used in the solubility test was submitted to atomic absorption spectrophotometry to determine and quantify Ca(2+), Na(+), K(+), Zn(2+), Ni(2+) and Pb(2+) ions release. In addition, the outer and inner surfaces of nonsubmitted and submitted samples of each material to the solubility test were analysed by means of scanning electron microscopy and energy-dispersive spectroscopy (SEM/EDX). Statistical analysis was performed by using one-way anova and Tukey's post hoc tests (α = 0.05). RESULTS Solubility results, in percentage, sorted in an increasing order were -1.24 ± 0.19 (MTA-A), 0.28 ± 0.08 (AH Plus), 5.65 ± 0.80 (Sealapex), 14.89 ± 0.73 (MTA Fillapex) and 20.64 ± 1.42 (iRoot SP). AH Plus and MTA-A were statistically similar (P > 0.05), but different from the other materials (P < 0.05). High levels of Ca(2+) ion release were observed in all groups except AH Plus sealer. MTA-A also had the highest release of Na(2+) and K(+) ions. Zn(+2) ion release was observed only with AH Plus and Sealapex sealers. After the solubility test, all surfaces had morphological changes. The loss of matrix was evident and the filler particles were more distinguishable. EDX analysis displayed high levels of calcium and carbon at the surface of Sealapex, MTA Fillapex and iRoot SP. CONCLUSIONS AH Plus and MTA-A were in accordance with ANSI/ADA's requirements regarding solubility whilst iRoot SP, MTA Fillapex and Sealapex did not fulfil ANSI/ADA's protocols. High levels of Ca(2+) ion release were observed in all materials except AH Plus. SEM/EDX analysis revealed that all samples had morphological changes in both outer and inner surfaces after the solubility test. High levels of calcium and carbon were also observed at the surface of all materials except AH Plus and MTA-A.
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Affiliation(s)
- R P Borges
- Department of Endodontics, University of Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil
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Flores DSH, Rached-Júnior FJA, Versiani MA, Guedes DFC, Sousa-Neto MD, Pécora JD. Evaluation of physicochemical properties of four root canal sealers. Int Endod J 2010; 44:126-35. [DOI: 10.1111/j.1365-2591.2010.01815.x] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Fornari VJ, Silva-Sousa YTC, Vanni JR, Pécora JD, Versiani MA, Sousa-Neto MD. Histological evaluation of the effectiveness of increased apical enlargement for cleaning the apical third of curved canals. Int Endod J 2010; 43:988-94. [DOI: 10.1111/j.1365-2591.2010.01724.x] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Affiliation(s)
- R P A Balvedi
- Faculty of Dentistry, Department of Endodontics, Universidade Federal de Uberlândia, Minas Gerais, Brazil
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Pascon EA, Marrelli M, Congi O, Ciancio R, Miceli F, Versiani MA. Anin vivocomparison of working length determination of two frequency-based electronic apex locators. Int Endod J 2009; 42:1026-31. [DOI: 10.1111/j.1365-2591.2009.01615.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Resende LM, Rached-Junior FJA, Versiani MA, Souza-Gabriel AE, Miranda CES, Silva-Sousa YTC, Sousa Neto MD. A comparative study of physicochemical properties of AH Plus, Epiphany, and Epiphany SE root canal sealers. Int Endod J 2009; 42:785-93. [DOI: 10.1111/j.1365-2591.2009.01584.x] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Versiani MA, Carvalho-Junior JR, Padilha MIAF, Lacey S, Pascon EA, Sousa-Neto MD. A comparative study of physicochemical properties of AH PlusTM and EpiphanyTM root canal sealants. Int Endod J 2006; 39:464-71. [PMID: 16674741 DOI: 10.1111/j.1365-2591.2006.01105.x] [Citation(s) in RCA: 129] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIM To evaluate setting time, solubility and disintegration, flow, film thickness, and dimensional change following setting in a dual-cured resin root canal sealer Epiphany compared with an epoxy-resin-based sealer AH Plus. METHODOLOGY The experiments were performed according to ANSI/ADA Specification 57 which tests the physicochemical properties of endodontic sealing materials. Five samples of each material were tested for each of the properties. In addition, deionized distilled water from the solubility test of Epiphany was submitted for analysis of the cations Fe, Ni, Ca, Mg, Zn, Na, and K in an atomic absorption spectrometer. Three samples were analysed. RESULTS There were no statistical differences (P>0.05) in flow (AH Plus: 38.57 mm; Epiphany: 35.74 mm) and film thickness (AH Plus: 10.6 microm; Epiphany: 20.1 microm). The solubility (AH Plus: 0.21%; Epiphany: 3.41%) and dimensional alterations following setting (AH Plus: expansion of 1.3%; Epiphany: expansion of 8.1%) were statistically different (P<0.05). The setting times of both sealants were in accordance with ANSI/ADA requirements. CONCLUSIONS Setting time, flow, and film thickness tests for both cements conformed to ANSI/ADA standards. Dimensional alteration test for both cements were greater than values considered acceptable by ANSI/ADA. Epiphany values regarding solubility were also greater than values considered acceptable by ANSI/ADA.
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Affiliation(s)
- M A Versiani
- Department of Endodontics, Universidade de Ribeirão Preto, Ribeirão Preto, São Paulo, Brazil
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Abstract
AIM To report a clinical case of unicystic ameloblastoma previously misdiagnosed as radicular cyst. SUMMARY A 49-year-old white male was referred to a private practitioner complaining of an asymptomatic bony hard swelling of the left posterior mandible. The patient's dental history indicated that his left mandibular first molar had been extracted approximately 10 years previously. At that time, preoperative radiographic examination demonstrated a radiolucent area of 1.5 cm diameter with well-defined margins involving the distal root of tooth 36. The lesion was diagnosed as cystic and surgery for its removal was advised, but not performed. At presentation, radiography demonstrated a well-defined 3 cm diameter radiolucency extending from the second premolar to the second molar. The lesion was enucleated and histopathological examination confirmed a diagnosis of unicystic ameloblastoma. KEY LEARNING POINTS *Despite a clinical diagnosis of periapical disease of endodontic origin, a nonendodontic lesion may be present. *Unicystic ameloblastoma located on the periapical area of a tooth can lead to a pulp-periapical misdiagnosis, and should be considered in differential diagnosis. *All tissue specimens recovered in apical surgery should be submitted to histopathological analysis.
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Affiliation(s)
- E M Cunha
- Department of Pathology, Dental School, Federal University of Uberlândia, Brazil
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Sousa CJA, Loyola AM, Versiani MA, Biffi JCG, Oliveira RP, Pascon EA. A comparative histological evaluation of the biocompatibility of materials used in apical surgery. Int Endod J 2004; 37:738-48. [PMID: 15479256 DOI: 10.1111/j.1365-2591.2004.00861.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
AIM To evaluate the biological properties of a variety of materials that could be used in apical surgery. METHODOLOGY The intraosseous implant technique recommended by the FDI (1980) and ADA (1982) was used to test the following materials: zinc oxide-eugenol (ZOE), mineral trioxide aggregate (MTA), and Z-100 light-cured composite resin. Thirty guinea-pigs, 10 for each material, divided into experimental periods of 4 and 12 weeks, received one implant on each side of the lower jaw symphysis. The connective tissue response alongside the lateral wall outside the cup served as a negative control for the technique. At the end of the observation periods, the animals were killed and the specimens prepared for routine histological examination to evaluate their biocompatibility. RESULTS The reaction of the tissue to the materials diminished with time. The ZOE cement was highly toxic during the 4-week experimental period, but this profile changed significantly after 12 weeks, when it showed biocompatible characteristics. MTA and Z-100 showed biocompatibility in this test model at both time periods. CONCLUSIONS MTA and Z-100 composite were biocompatible at 4 and 12 weeks in this experimental model.
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Affiliation(s)
- C J A Sousa
- Department of Endodontics, University of Uberlândia, CEP 38405-320 Uberlandia, Minas Gerais, Brazil
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