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Camilo NG, Gonçalves ADR, Flauzino LP, Bernardes CMR, Aranha AMF, Lazari-Carvalho PC, de Carvalho MA, de Oliveira HF. Influence of Chitosan 0.2% in Various Final Cleaning Methods on the Bond Strength of Fiberglass Post to Intrarradicular Dentin. Polymers (Basel) 2023; 15:4409. [PMID: 38006133 PMCID: PMC10675818 DOI: 10.3390/polym15224409] [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: 10/11/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
The purpose of this study was to analyze the influence of Chitosan 0.2% in various final cleaning methods on the bond strength of fiberglass post (FP) to intrarradicular dentin. Ninety bovine incisors were sectioned to obtain root remnants measuring 18 mm in length. The roots were divided: G1: EDTA 17%; G2: EDTA 17% + PUI; G3: EDTA 17% + EA; G4: EDTA 17% + XPF; G5: Chitosan 2%; G6: Chitosan 2% + PUI; G7: Chitosan 2% + EA; G8: Chitosan 2% +XPF. After carrying out the cleaning methods, the posts were installed, and the root was cleaved to generate two disks from each root third. Bond strength values (MPa) obtained from the micro push-out test data were assessed by using Kruskal-Wallis and Dwass-Steel-Critchlow-Fligner tests for multiple comparisons (α = 5%). Differences were observed in the cervical third between G1 and G8 (p = 0.038), G4 and G8 (p = 0.003), G6 and G8 (p = 0.049), and Control and G8 (p = 0.019). The final cleaning method influenced the adhesion strength of cemented FP to intrarradicular dentin. Chitosan 0.2% + XPF positively influenced adhesion strength, with the highest values in the cervical third.
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Affiliation(s)
- Naira Geovana Camilo
- Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Anápolis 75083-515, GO, Brazil; (N.G.C.); (A.d.R.G.); (C.M.R.B.)
| | - Alex da Rocha Gonçalves
- Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Anápolis 75083-515, GO, Brazil; (N.G.C.); (A.d.R.G.); (C.M.R.B.)
| | - Larissa Pinzan Flauzino
- Department of Oral Biology, School of Dentistry, University of Cuiabá, Cuiabá 78065-900, MT, Brazil; (L.P.F.); (A.M.F.A.)
| | | | - Andreza Maria Fábio Aranha
- Department of Oral Biology, School of Dentistry, University of Cuiabá, Cuiabá 78065-900, MT, Brazil; (L.P.F.); (A.M.F.A.)
| | - Priscilla Cardoso Lazari-Carvalho
- Department of Restorative Sciences, School of Dentistry, Evangelical University of Goiás, Anápolis 75083-515, GO, Brazil; (P.C.L.-C.); (M.A.d.C.)
| | - Marco Aurélio de Carvalho
- Department of Restorative Sciences, School of Dentistry, Evangelical University of Goiás, Anápolis 75083-515, GO, Brazil; (P.C.L.-C.); (M.A.d.C.)
| | - Helder Fernandes de Oliveira
- Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Anápolis 75083-515, GO, Brazil; (N.G.C.); (A.d.R.G.); (C.M.R.B.)
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de Oliveira HF, da Silva Júnior IF, Teixeira LCG, Camilo NG, de Almeida Decurcio D, Guedes OA, de Araújo Estrela CR. Influence of different agitation techniques on bacterial reduction in curved root canals. AUST ENDOD J 2022; 49:104-110. [PMID: 35488771 DOI: 10.1111/aej.12623] [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: 09/22/2021] [Revised: 02/18/2022] [Accepted: 04/04/2022] [Indexed: 11/30/2022]
Abstract
The aim of this study was to evaluate the influence of agitation techniques on bacterial reduction in curved root canals. Eighty human mandibular molars were prepared, inoculated with Enterococcus faecalis and incubated at 37°C for 60 days. Then, specimens were randomly separated into two test groups (n = 36) and two control groups (n = 04) according to agitation technique: Passive ultrasonic irrigation (PUI, Irrisonic) and XP-endo Finisher (XPF). Microbial samples were collected before and after instrumentation and after final agitation using sterile paper points. Bacterial growth was analysed by turbidity of culture medium and UV spectrophotometry. The Wilcoxon rank test was used for the paired analysis, while the Mann-Whitney U-test was used for the non-paired analysis. The samples collected after final agitation were significantly different between test groups (p < 0.05). Bacterial reduction was greater in the PUI than in the XPF (p < 0.05) group. The irrigant agitation provided significant bacterial reduction. The use of the PUI showed better results.
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Affiliation(s)
| | | | | | - Naira Geovana Camilo
- Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Goiás, Brazil
| | | | - Orlando Aguirre Guedes
- Department of Endodontics, School of Dentistry, Evangelical University of Goiás, Goiás, Brazil
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Filho GS, Guedes OA, Pereira TM, Miranda-Pedro FL, Aranha AMF, de Oliveira HF, Pécora JD, Borges ÁH. Residual Dentin Thickness in Bifurcated Maxillary Premolars after Cervical Preflaring Preparation: A CBCT Analysis. Open Dent J 2021. [DOI: 10.2174/1874210602115010495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Objective:
This study evaluated the residual dentin thickness (RDT) of maxillary premolars after the use of different cervical preflaring (PF) drills by using cone-beam computed tomography (CBCT).
Methods:
Eighty bifurcated maxillary premolars were accessed and randomly divided into 5 groups (n=16). PF was performed with Gates-Glidden #1, #2, and #3 (group 1), Largo #1 and #2 (group 2), and LA Axxess #20/.06 (group 3), #35/.06 (group 4), and #45/.06 (group 5). CBCT images were acquired before (preoperative) and after (postoperative) PF. Initial and final cervical dentin thickness was measured at the buccal, palatal, mesial, and distal aspects, 0.5 mm coronally to the furcation, on both buccal and palatal roots, using CBCT’s image analysis software. The percentage of removed dentin after PF preparation was also calculated. Data were analyzed using ANOVA followed by Tukey’s test at a significance level of P < 0.05.
Results:
No statistically significant differences were found among the groups for preoperative or postoperative RDT (P > 0.05). LA Axxess #20/.06 (group 3) removed significantly less cervical dentin at all root canal aspects on both buccal and palatal roots. The mesial aspect of the buccal root and distal aspect of the palatal root were significantly reduced after the use of LA Axxess #45/.06 (group 5) and Largo #1 and #2 drills (group 2), respectively (P < 0.05).
Conclusion:
PF in bifurcated maxillary premolars should be performed with LA Axxess instrument #20/.06. The use of Gates-Glidden #1, #2, and #3, Largo #1 and #2, and LA Axxess #45/.06 drills should be done with caution.
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Dezzen-Gomide AC, de Carvalho MA, Lazari-Carvalho PC, de Oliveira HF, Cury AADB, Yamamoto-Silva FP, Silva BSDF. A three-dimensional finite element analysis of permanent maxillary central incisors in different stages of root development and trauma settings. Comput Methods Programs Biomed 2021; 207:106195. [PMID: 34082308 DOI: 10.1016/j.cmpb.2021.106195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Accepted: 05/15/2021] [Indexed: 05/10/2023]
Abstract
BACKGROUND AND OBJECTIVES Differences in dental maturation may affect the prognosis and clinical management of traumatized teeth. However, evaluation of the outcomes of dental trauma to the tooth and support structures in an in vivo model involves major methodological and ethical implications. Thus, the aim of the present study was to perform a three-dimensional finite element analysis of permanent maxillary central incisors in different stages of root development under different trauma settings. METHODS The study factors included two trauma conditions (B, buccal; I, incisal) on upper permanent central incisors showing three different stages of root development (CR, complete rhizogenesis; IRA; incomplete rhizogenesis in the apical third of the root; and IRM, incomplete rhizogenesis in the middle third of the root) to yield six models. The complete rhizogenesis model was obtained with a cone-beam computed tomography examination of an extracted tooth. The two incomplete rhizogenesis models were modeled on the basis of similar examinations of patients. Trauma was simulated by applying a 300 N static surface to surface load on the incisal edge or perpendicular to the buccal surface of the tooth. The displacement and equivalent von Mises (σvM) stress values were obtained for alveolar bone, periodontal ligament, apical papilla, and dentin for the quantitative analysis. A σvM color-coded scale was used for qualitative analysis. RESULTS The force direction had a greater influence on the stress than the root-formation stage. Buccal forces resulted in higher stress concentration in the bone and periodontal ligament, especially in B-CR. Lower stress was found on the periodontal ligament as the root formation progressed (decrease of 8% from B-IRA to B-CR and 11% from B-IRM to B-CR). The incomplete rhizogenesis models showed higher σvM stress peak values in dentin in comparison with complete rhizogenesis (increase of 52% from B-CR to B-IRA and 56% from B-CR to B-IRM). CONCLUSIONS Buccal forces yielded greater stress values regardless of the stage of rhizogenesis. Teeth with fully formed roots showed a higher stress concentration in the alveolar bone and periodontal ligament in comparison with immature teeth, with the latter presenting high stresses in the tooth crown.
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Affiliation(s)
| | | | | | | | - Altair A Del Bel Cury
- Department of Prosthodontics and Periodontology, Piracicaba Dental School, State University of Campinas, Piracicaba, Brazil
| | | | - Brunno Santos de Freitas Silva
- Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, GO, Brazil, and University of Anápolis, Anápolis, GO, Brazil.
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Oliveira HFD, Sousa VCD, Carvalho AL, Silva BSDF, Guedes OA. Apexification as a Clinical Strategy for the Management of an Immature Non-Vital Tooth with Buccal Bone Loss: A Case Report. J Clin Diagn Res 2019. [DOI: 10.7860/jcdr/2019/42405.13339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Guedes OA, da Costa MVC, Dorilêo MCGO, de Oliveira HF, Pedro FLM, Bandeca MC, Borges ÁH. Detection of Procedural Errors during Root Canal Instrumentation using Cone Beam Computed Tomography. J Int Oral Health 2015; 7:28-32. [PMID: 25878475 PMCID: PMC4385722] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Accepted: 12/20/2014] [Indexed: 11/04/2022] Open
Abstract
BACKGROUND This study investigated procedural errors made during root canal preparation with nickel-titanium (NiTi) instruments, using cone beam computed tomography (CBCT) imaging method. MATERIALS AND METHODS A total of 100 human mandibular molars were divided into five groups (n = 20) according to the NiTi system used for root canal preparation: Group 1 - BioRaCe, Group 2 - K3, Group 3 - ProTaper, Group 4 - Mtwo and Group 5 - Hero Shaper. CBCT images were obtained to detect procedural errors made during root canal preparation. Two examiners evaluated the presence or absence of fractured instruments, perforations, and canal transportations. Chi-square test was used for statistical analyzes. The significance level was set at a=5%. RESULTS In a total of 300 prepared root canals, 43 (14.33%) procedural errors were detected. Perforation was the procedural errors most commonly observed (58.14%). Most of the procedural errors were observed in the mesiobuccal root canal (48.84%). In the analysis of procedural errors, there was a significant difference (P < 0.05) between the groups of NiTi instruments. The root canals instrumented with BioRaCe had significantly less procedural errors. CONCLUSIONS CBCT permitted the detection of procedural errors during root canal preparation. The frequency of procedural errors was low when root canals preparation was accomplished with BioRaCe system.
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Affiliation(s)
- Orlando Aguirre Guedes
- Professor, Department of Endodontics, School of Dentistry, University of Cuiabá, Cuiabá, Mato Grosso, Brazil,Correspondence: Dr. Guedes OA. Faculdade de Odontologia, Universidade de Cuiabá, Av. Manoel José de Arruda, 3100, Jardim Europa, 78065-900, Cuiabá, Mato Grosso, Brazil. Fax: +55 65 3363-1271, Tel.: +55 65 3363-1264,
| | | | | | - Helder Fernandes de Oliveira
- Professor, Department of Stomatologic Sciences, School of Dentistry, Federal University of Goiás, Goiânia, Goiás, Brazil
| | - Fábio Luis Miranda Pedro
- Professor, Department of Endodontics, School of Dentistry, University of Cuiabá, Cuiabá, Mato Grosso, Brazil
| | - Matheus Coelho Bandeca
- Professor, Department of Prosthodontic Dentistry, School of Dentistry, Master Program in Dentistry, UNICEUMA, São Luís, Maranhão, Brazil
| | - Álvaro Henrique Borges
- Professor, Department of Endodontics, School of Dentistry, University of Cuiabá, Cuiabá, Mato Grosso, Brazil
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