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Teixeira TF, da Silva AMP, Coutinho TMDC, Marceliano EFV, Dos Santos Miranda ARL, Ferreira DDC, Provenzano JC, Marceliano-Alves MFV. Deciduous Molars Complexity Anatomy Reveled by Computed Microtomography. Eur J Dent 2023. [PMID: 37729937 DOI: 10.1055/s-0043-1772566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023] Open
Abstract
OBJECTIVE The aim of this study was to analyze the internal morphology of deciduous molars through the use of computed microtomography in a sample from Rio de Janeiro. MATERIAL AND METHODS Thirty maxillary and 30 mandibular deciduous molars (n = 60), divided in first and second primary molars, were scanned by computed microtomography. The teeth were evaluated for root number, root canals, Vertucci classification, root curvature, presence of lateral canals, furcation dentin thickness, structure model index (SMI), volume, and canal surface area. RESULTS The results showed 100% of maxillary molars had three roots and Vertucci type I canal was more prevalent in this group. In the mandibular ones, type IV was more frequent in the mesial root and class I in the distal root and the cavo-interradicular canal occurred in 2 specimens. Dentin thickness in the furcation region measured 1.53 and 1.59 mm in the maxillary and mandibular, respectively. Volume and area parameters varied according to the evaluated canals and SMI demonstrated that all canals had a cylindrical shape. CONCLUSION More detailed information about the internal anatomy of the primary molars has been described, which may help strategies in the preparation of these root canals.
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Loyola-Fonseca SC, Campello AF, Rodrigues RCV, Alves FRF, Brasil SC, Vilela CLS, Gonçalves LS, Provenzano JC, Siqueira JF, Rôças IN. Disinfection and Shaping of Vertucci Class II Root Canals after Preparation with Two Instrument Systems and Supplementary Ultrasonic Activation of Sodium Hypochlorite. J Endod 2023; 49:1183-1190. [PMID: 37419243 DOI: 10.1016/j.joen.2023.06.017] [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] [Received: 04/20/2023] [Revised: 06/26/2023] [Accepted: 06/27/2023] [Indexed: 07/09/2023]
Abstract
INTRODUCTION This study compared disinfection and shaping after root canal preparation with either XP-endo Shaper or TruNatomy instrument systems, supplemented by ultrasonic activation of sodium hypochlorite (NaOCl) with either stainless-steel (SS) or nickel-titanium (NiTi) inserts. METHODS Mesial roots from mandibular molars with Vertucci class II configuration were divided into 2 groups (n = 24) based on anatomically paired micro-computed tomography (micro-CT) analyses. Pre and postpreparation micro-CT scans were obtained to evaluate the shaping performance. The canals were contaminated with a mixed bacterial culture for 30 days and then subjected to preparation with either XP-endo Shaper or TruNatomy instruments using NaOCl irrigation. Supplementary ultrasonic activation of NaOCl was conducted using either an SS (TruNatomy group) or NiTi (XP-endo Shaper group) insert. Bacteriological samples were taken from the canals before preparation (S1), after preparation (S2), and after the supplementary approach (S3). Bacterial reduction was evaluated using a quantitative real-time polymerase chain reaction. RESULTS Preparation with both instrument systems significantly reduced bacterial counts (P < .01). After preparation, 36% (TruNatomy) and 35% (XP-endo Shaper) were negative for bacteria. These values increased to 59% and 65% after ultrasonic activation with the SS and NiTi inserts, respectively. The quantitative data in S2 showed that XP-endo Shaper promoted a significantly higher bacterial reduction than TruNatomy (P < .05). No significant intragroup differences were observed after ultrasonic activation (P > .05), probably because the SS insert promoted a significantly higher S2-to-S3 reduction than the NiTi insert (P < .01). Micro-CT analysis revealed no significant differences in the unprepared areas between the groups (P > .05). CONCLUSIONS The XP-endo Shaper caused a significantly higher bacterial reduction than TruNatomy in Vertucci class II canals. Better antibacterial results after ultrasonic activation were observed for the SS ultrasonic inserts than for the NiTi inserts.
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Affiliation(s)
- Simone C Loyola-Fonseca
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Andrea F Campello
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Renata C V Rodrigues
- Department of Endodontics, Faculty of Dentistry, Veiga de Almeida University (UVA), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Flávio R F Alves
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Sabrina C Brasil
- Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Caren L S Vilela
- Laboratory of Molecular Microbial Ecology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lucio S Gonçalves
- Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - José Claudio Provenzano
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
| | - José F Siqueira
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
| | - Isabela N Rôças
- Department of Dental Research, Faculty of Dentistry, Iguaçu University (UNIG), Nova Iguaçu, Rio de Janeiro, Brazil; Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, Rio de Janeiro, Brazil
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Gomes ILL, Alves FRF, Marceliano-Alves MF, Silveira SB, Sousa JCN, Provenzano JC, Gonçalves LS. Apical transportation using Mtwo or Reciproc retreatment systems in severely curved canals: a micro-computed tomographic study. Clin Oral Investig 2023; 27:1235-1241. [PMID: 36264344 DOI: 10.1007/s00784-022-04751-z] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 10/06/2022] [Indexed: 11/29/2022]
Abstract
OBJECTIVE To assess apical root canal transportation using Mtwo or Reciproc during retreatment of severely curved canals, using a multi-analytical approach. METHODS Forty mesial canals from mandibular molars (Vertucci type IV) were evaluated before and after endodontic retreatment to compare apical transportation with Mtwo retreatment or Reciproc. The systems were used on the same root but alternating the mesial canals. The analyses were performed by micro-computed tomography. Four evaluations were performed: (a) longitudinal transportation, (b) horizontal transportation, (c) variation in the angle of curvature of the canal, and (d) canal-root width ratio. Horizontal transportation and canal-root width ratio were evaluated in 1-, 3-, and 5-mm levels. RESULTS Longitudinal transportation occurred in all samples, with a mean of 0.13 mm for Mtwo and 0.17 mm for Reciproc. Horizontal transportation increased as distant from the apex was the evaluated level, in mean. However, the transport was not observed in all samples. The mean angle of curvature was 4.16 for Mtwo and 3.03 for Reciproc. Canal-root width decreased as distant from the apex was the evaluated level. No significant differences were observed considering all tested variables, independently of the retreatment system or evaluated level (p > 0.05). CONCLUSION Mtwo retreatment and Reciproc presented similar apical transportation (horizontal or vertical). CLINICAL RELEVANCE Both Mtwo retreatment and Reciproc systems could be considered safe regarding apical transportation.
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Affiliation(s)
- Isabelle L L Gomes
- Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
| | - Flávio R F Alves
- Faculty of Dentistry, Department of Endodontics, Iguaçu University (UNIG), Av. Abílio Augusto Távora, 2134 - Luz, Nova Iguaçu, RJ, 26260-045, Brazil.,Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, RJ, Brazil
| | - Marília F Marceliano-Alves
- Faculty of Dentistry, Department of Endodontics, Iguaçu University (UNIG), Av. Abílio Augusto Távora, 2134 - Luz, Nova Iguaçu, RJ, 26260-045, Brazil
| | - Stephanie B Silveira
- Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
| | - Júlio Cézar N Sousa
- Faculty of Dentistry, Department of Endodontics, University Center of João Pessoa, Paraíba, Brazil
| | - José Claudio Provenzano
- Faculty of Dentistry, Department of Endodontics, Iguaçu University (UNIG), Av. Abílio Augusto Távora, 2134 - Luz, Nova Iguaçu, RJ, 26260-045, Brazil. .,Postgraduate Program in Dentistry, University of Grande Rio (UNIGRANRIO), Rio de Janeiro, RJ, Brazil.
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Gomes ILL, Alves FRF, Marceliano-Alves MF, Silveira SB, Provenzano JC, Gonçalves LS. Canal transportation using Mani GPR or HyFlex NT during the retreatment of curved root canals: A micro-computed tomographic study. AUST ENDOD J 2020; 47:73-80. [PMID: 33247880 DOI: 10.1111/aej.12470] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [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: 05/14/2020] [Revised: 09/29/2020] [Accepted: 11/08/2020] [Indexed: 11/29/2022]
Abstract
This study assessed the apical transportation using Mani GPR or HyFlex NT during the retreatment of curved root canals. Thirty-eight roots were analysed using micro-CT for the comparison of apical transportation produced by two retreatment systems. Longitudinal transportation, horizontal transportation, variation in the canal angle of curvature and variation in the canal/root width ratio were analysed. Longitudinal transportation was frequently observed, regardless of the system used. The canals retreated with Mani GPR showed a significantly higher horizontal transportation at 1 mm from the root apex (P < 0.01) and greater variation of the canal curvature angle (P < 0.01). The canal/root width ratio was similar between groups (P > 0.05). In conclusion, longitudinal transportation occurred more frequently in the mesial canal walls. Mani GPR showed greater horizontal transportation at 1 mm short of the apex, and higher variation of the canal curvature angle compared with HyFlex NT.
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Affiliation(s)
| | - Flávio Rodrigues Ferreira Alves
- Faculty of Dentistry, Iguaçu University, Nova Iguaçu, Brazil.,Postgraduate Program in Dentistry, Grande Rio University (UNIGRANRIO), Rio de Janeiro, Brazil
| | | | - Stephanie B Silveira
- Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil
| | - José Claudio Provenzano
- Postgraduate Program in Dentistry, Estácio de Sá University, Rio de Janeiro, Brazil.,Faculty of Dentistry, Iguaçu University, Nova Iguaçu, Brazil
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Almeida BM, Provenzano JC, Marceliano-Alves MF, Rôças IN, Siqueira JF. Matching the Dimensions of Currently Available Instruments with the Apical Diameters of Mandibular Molar Mesial Root Canals Obtained by Micro–computed Tomography. J Endod 2019; 45:756-760. [DOI: 10.1016/j.joen.2019.03.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/18/2019] [Accepted: 03/01/2019] [Indexed: 11/24/2022]
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Campello AF, Almeida BM, Franzoni MA, Alves FRF, Marceliano-Alves MF, Rôças IN, Siqueira JF, Provenzano JC. Influence of solvent and a supplementary step with a finishing instrument on filling material removal from canals connected by an isthmus. Int Endod J 2018; 52:716-724. [PMID: 30481389 DOI: 10.1111/iej.13047] [Citation(s) in RCA: 20] [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: 06/24/2018] [Accepted: 11/21/2018] [Indexed: 11/27/2022]
Abstract
AIM To evaluate the effectiveness of a solvent (eucalyptol) in improving filling material removal from canals connected by isthmuses, and the additional cleaning effect of a finishing instrument. METHODOLOGY The mesial canals from 32 mandibular molars (Vertucci's type II morphology) were instrumented and filled with the single-cone technique using Reciproc R25 gutta-percha points (VDW, Munich, Germany) combined with Sealer 26 (Dentsply, Petrópolis, RJ, Brazil). Each root was then subjected to retreatment using the Mtwo instrument system (VDW), with or without a solvent (n = 16 per group). The volume of filling material in the canals was assessed by micro-computed tomographic (micro-CT) scans taken before and after retreatment. Canals with remnants of filling material received a supplementary procedure with the XP-endo Finisher R instrument (FKG Dentaire, La Chaux-de-Fonds, Switzerland), with or without eucalyptol, and another micro-CT scan was taken. All retreatment procedures were performed inside a cabinet under a controlled temperature (37 °C). Filling material removal was evaluated in the 5-mm apical canal system for the canal+isthmus space or the isthmus alone. Statistical analyses were performed to compare the removal of filling material with and without eucalyptol, and after a supplementary approach with XP-endo Finisher R. The level of significance was set at 5% for all statistical tests (P < 0.05). RESULTS The amount of filling material removed from the canal+isthmus with Mtwo instruments was 83.2% when no solvent was used and 83.8% using the solvent (P > 0.05). When the isthmus area was evaluated separately, most specimens were associated with a reduction in the filling material, with no significant difference between the groups with or without using a solvent (P > 0.05). The supplementary step with XP-endo Finisher R significantly improved removal of filling material from both canal and isthmus area (P < 0.05), regardless of the use of a solvent (P > 0.05). CONCLUSION The use of eucalyptol did not improve filling material removal from Vertucci's type II molar mesial canals and isthmuses. XP-endo Finisher R significantly enhanced removal of filling material from the canals and isthmuses.
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Affiliation(s)
- A F Campello
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - B M Almeida
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - M A Franzoni
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - F R F Alves
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - M F Marceliano-Alves
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - I N Rôças
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - J F Siqueira
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - J C Provenzano
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
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Rôças IN, Provenzano JC, Neves MA, Siqueira JF. Disinfecting Effects of Rotary Instrumentation with Either 2.5% Sodium Hypochlorite or 2% Chlorhexidine as the Main Irrigant: A Randomized Clinical Study. J Endod 2016; 42:943-7. [DOI: 10.1016/j.joen.2016.03.019] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Revised: 03/24/2016] [Accepted: 03/25/2016] [Indexed: 01/28/2023]
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Provenzano JC, Antunes HS, Alves FR, Rôças IN, Alves WS, Silva MR, Siqueira JF. Host-Bacterial Interactions in Post-treatment Apical Periodontitis: A Metaproteome Analysis. J Endod 2016; 42:880-5. [DOI: 10.1016/j.joen.2016.02.013] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 02/22/2016] [Accepted: 02/26/2016] [Indexed: 11/27/2022]
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Marceliano-Alves M, Alves FRF, Mendes DDM, Provenzano JC. Micro-Computed Tomography Analysis of the Root Canal Morphology of Palatal Roots of Maxillary First Molars. J Endod 2015; 42:280-3. [PMID: 26631299 DOI: 10.1016/j.joen.2015.10.016] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [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: 05/21/2015] [Revised: 10/22/2015] [Accepted: 10/25/2015] [Indexed: 01/15/2023]
Abstract
INTRODUCTION A thorough knowledge of root canal anatomy is critical for successful root canal treatments. This study evaluated the internal anatomy of the palatal roots of maxillary first molars with micro-computed tomography (microCT). METHODS The palatal roots of extracted maxillary first molars (n = 169) were scanned with microCT to determine several anatomic parameters, including main canal classification, lateral canal occurrence and location, degree of curvature, main foramen position, apical constriction presence, diameters 1 and 2 mm from the apex and 1 mm from the foramen, minor dentin thickness in those regions, canal volume, surface area, and convexity. RESULTS All canals were classified as Vertucci type I. The cross sections were oval in 61% of the canals. Lateral canals were found in 25% of the samples. The main foramen did not coincide with the root apex in 95% of the cases. Only 8% of the canals were classified as straight. Apical constriction was identified in 38% of the roots. The minor and major canal diameters and minor dentin thickness were decreased near the apex. The minor dentin thickness 1 mm from the foramen was 0.82 mm. The palatal canals exhibited a volume of 6.91 mm(3) and surface area of 55.31 mm(2) and were rod-shaped. CONCLUSIONS The root canals of the palatal roots were classified as type I. However, some factors need to be considered during the treatment of these roots, including the frequent ocurrence of moderate/severe curvatures, oval-shaped cross-sections, and lateral canals, noncoincidence of the apical foramen with the root apex, and absence of apical constriction in most cases.
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Affiliation(s)
- Marília Marceliano-Alves
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | | | - Daniel de Melo Mendes
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - José Claudio Provenzano
- Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
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Provenzano JC, Rôças IN, Tavares LFD, Neves BC, Siqueira JF. Short-chain Fatty Acids in Infected Root Canals of Teeth with Apical Periodontitis before and after Treatment. J Endod 2015; 41:831-5. [PMID: 25799538 DOI: 10.1016/j.joen.2015.02.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [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: 07/10/2014] [Revised: 12/01/2014] [Accepted: 02/04/2015] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Short-chain fatty acids (SCFAs) are bacterial metabolic end products that may function as virulence factors. This study evaluated the occurrence of SCFAs in infected root canals before and after treatment. METHODS Samples were taken from root canals of teeth with apical periodontitis before (S1) and after (S2) chemomechanical preparation with either NaOCl or chlorhexidine as the irrigant and then after interappointment medication with calcium hydroxide (S3). High-performance liquid chromatography was used for detection of SCFAs. Selected bacterial taxa that are recognized producers of the target SCFAs were identified by real-time polymerase chain reaction. RESULTS Butyric acid was the most common fatty acid in S1, followed by propionic acid. Both molecules were also found in S2 and S3 from both NaOCl and chlorhexidine groups. Lactic acid was not present in detectable levels in S1, but it occurred in 1 postinstrumentation sample and in 9 samples taken after calcium hydroxide medication. Of the target taxa, Fusobacterium nucleatum was the most prevalent in S1 (76%), followed by members of the Actinobacteria phylum (71%), Streptococcus species (59%), and Parvimonas micra (53%). Gram-positive taxa, especially streptococci, were the most prevalent bacteria in S2 and S3. SCFA detection was matched with the respective potential producer species in most cases. CONCLUSIONS This first report of SCFAs in infected root canals suggests that these molecules may play a role in the pathogenesis of apical periodontitis. Significance of persistence of SCFAs after treatment and its effects on the long-term outcome await elucidation.
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Affiliation(s)
- José Claudio Provenzano
- Molecular Microbiology Laboratory, Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil.
| | - Isabela N Rôças
- Molecular Microbiology Laboratory, Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Luís Fernando D Tavares
- Laboratory of Molecular Microbiology and Proteins, Department of Biochemistry, Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Bianca Cruz Neves
- Laboratory of Molecular Microbiology and Proteins, Department of Biochemistry, Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Rio de Janeiro, Brazil
| | - José F Siqueira
- Molecular Microbiology Laboratory, Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, Rio de Janeiro, Brazil
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Provenzano JC, Siqueira JF, Rôças IN, Domingues RR, Paes Leme AF, Silva MRS. Metaproteome analysis of endodontic infections in association with different clinical conditions. PLoS One 2013; 8:e76108. [PMID: 24143178 PMCID: PMC3797121 DOI: 10.1371/journal.pone.0076108] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Accepted: 08/21/2013] [Indexed: 12/12/2022] Open
Abstract
Analysis of the metaproteome of microbial communities is important to provide an insight of community physiology and pathogenicity. This study evaluated the metaproteome of endodontic infections associated with acute apical abscesses and asymptomatic apical periodontitis lesions. Proteins persisting or expressed after root canal treatment were also evaluated. Finally, human proteins associated with these infections were identified. Samples were taken from root canals of teeth with asymptomatic apical periodontitis before and after chemomechanical treatment using either NaOCl or chlorhexidine as the irrigant. Samples from abscesses were taken by aspiration of the purulent exudate. Clinical samples were processed for analysis of the exoproteome by using two complementary mass spectrometry platforms: nanoflow liquid chromatography coupled with linear ion trap quadrupole Velos Orbitrap and liquid chromatography-quadrupole time-of-flight. A total of 308 proteins of microbial origin were identified. The number of proteins in abscesses was higher than in asymptomatic cases. In canals irrigated with chlorhexidine, the number of identified proteins decreased substantially, while in the NaOCl group the number of proteins increased. The large majority of microbial proteins found in endodontic samples were related to metabolic and housekeeping processes, including protein synthesis, energy metabolism and DNA processes. Moreover, several other proteins related to pathogenicity and resistance/survival were found, including proteins involved with adhesion, biofilm formation and antibiotic resistance, stress proteins, exotoxins, invasins, proteases and endopeptidases (mostly in abscesses), and an archaeal protein linked to methane production. The majority of human proteins detected were related to cellular processes and metabolism, as well as immune defense. Interrogation of the metaproteome of endodontic microbial communities provides information on the physiology and pathogenicity of the community at the time of sampling. There is a growing need for expanded and more curated protein databases that permit more accurate identifications of proteins in metaproteomic studies.
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Affiliation(s)
- José Claudio Provenzano
- Department of Biochemistry, Chemistry Institute, Federal University of Rio de Janeiro, Rio de Janeiro, RJ, Brazil ; Department of Endodontics, Faculty of Dentistry, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
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Armada-Dias L, Breda J, Provenzano JC, Breitenbach M, Rôças IDN, Gahyva SMM, Siqueira JF. Development of periradicular lesions in normal and diabetic rats. J Appl Oral Sci 2006; 14:371-5. [PMID: 19089060 PMCID: PMC4327230 DOI: 10.1590/s1678-77572006000500013] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2006] [Revised: 07/18/2006] [Accepted: 08/17/2006] [Indexed: 12/14/2022] Open
Abstract
Evidence suggests that diabetic patients are more significantly affected by problems of endodontic origin. This study sought to radiographically and histologically examine the development of periradicular inflammation in control and in diabetic rats after induction of pulpal infection. The pulps of the mandibular first molars of normal and streptozotocin-induced diabetic rats were exposed and left in contact with their oral cavities for 21 and 40 days. Afterwards, the animals were sacrificed, the mandibles were surgically removed, fixed in formalin and then radiographed in a standardized position. The radiographic images of the periradicular lesions were scanned and computerized images were evaluated for the total area of the lesions using a specific software. Representative specimens were also prepared for histopathological analysis. Radiographic analysis revealed that diabetic rats presented significantly larger periradicular lesions when compared with control rats, regardless of the experimental period (p<0.05). Histopathological examination of representative specimens revealed larger periradicular lesions and more severe inflammatory exudate in the group of diabetic rats when compared with the control group. Data from the present study indicated that diabetic rats can be more prone to develop large periradicular lesions, possibly due to reduction in the defense ability against microbial pathogens.
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Affiliation(s)
- Luci Armada-Dias
- PhD, Professor of Physiology, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Jorge Breda
- Undergraduate student, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - José Claudio Provenzano
- DDS, Graduate student, Master's Program in Endodontics, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Marisa Breitenbach
- PhD, Professor of Physiology, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | - Isabela das Neves Rôças
- PhD, Professors of Endodontics, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
| | | | - José Freitas Siqueira
- PhD, Professors of Endodontics, Dental School, Estácio de Sá University, Rio de Janeiro, RJ, Brazil
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