Navegando por Assunto "Endodontia"

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    Impacto das soluções irrigadoras na suscetibilidade à fratura de dentes tratados endodonticamente e com lesões cervicais não cariosas
    (Centro Universitário do Estado do Pará, 2024) Vasconcelos, Alessandra Silva de; Rodrigues, Patrícia de Almeida; http://lattes.cnpq.br/7995657020175355; Brandão, Juliana Melo da Silva; http://lattes.cnpq.br/0139871747607033; Moura, João Daniel Mendonça de; http://lattes.cnpq.br/4761510364570610
    Endodontically treated teeth are more susceptible to fractures due to tissue loss, moisture reduction, and structural changes caused by intracanal irrigants and medications. Non-carious cervical lesions (NCCLs) also increase dental fragility, making teeth more prone to fracture when treated endodontically. Objective: To evaluate the impact of different irrigating solutions on the fracture resistance (FR) of human teeth with NCCLs treated endodontically. Materials and Methods: Artificial wedge-shaped NCCLs were created on forty-five human premolars with a single root and two canals. Teeth were instrumented using the Wave One Gold “Medium” reciprocating system and divided according to the irrigating solution used: LCNC+NaCl 0.9%, LCNC+NaOCl 2.5%, and LCNC+Test Solution (detergent). All groups received final irrigation using Passive Ultrasonic Irrigation (PUI) with 2.5% NaOCl and 17% EDTA. The canals were obturated and restored, and specimens underwent a compression test. Fracture modes were categorized as favorable and unfavorable. Statistical analysis included the Shapiro-Wilk test for normality, ANOVA, and Tukey’s post hoc test for intergroup comparisons (p<0.05) using Jamovi 1.8.4 software. Results: The highest mean FR was observed in the control group (LCNC+NaCl 0.9%) at 697 N, followed by the LCNC+Test Solution group at 601 N, while the LCNC+NaOCl 2.5% group showed the lowest mean FR at 585 N. Favorable fracture percentages were higher in the LCNC+NaCl (40%) and LCNC+Test Solution (26%) groups, while the LCNC+NaOCl group had a high rate of unfavorable fractures (93%). No significant statistical difference was found between tests groups regarding FR or fracture types observed. Conclusion: Within the limitations of this in vitro study, both 2.5% NaOCl and the detergent solution were viable alternatives to saline control, with no significant compromise in FR in endodontically treated teeth with NCCLs.
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    O efeito da miliamperagem na detecção do canal mesiopalatino de molares superiores em tomografia computadorizada de feixe cônico
    (Centro Universitário do Estado do Pará, 2018) Ribeiro, Camila Ribeiro; Rodrigues, Patrícia de Almeida; http://lattes.cnpq.br/7995657020175355; Pessoa, Oscar Faciola; http://lattes.cnpq.br/9576667373951387; Tuji, Fabrício Mesquita; http://lattes.cnpq.br/8122254353290848
    Introduction: This study tested the accuracy of the Cone Beam Computed Tomography (CBCT) on the detection of the mesiopalatine canal (MPC) treatment of the first permanent molars after the instrumentation and obturation of the root canals with a variation on the milliamperage (mA) values. Methods: The first twenty first permanent molars were divided, initially, in two groups: I) teeth which had three root canals and II) teeth which had four root canals. The canals were prepared with the Protaper Next system until the instrument X3, irrigated with a sodium hypochlorite solution at 2,5% and endodontically treated by the only beam technique and the AH Plus cement. The MPC of group II was not instrumented nor endodontically treated. The images were acquired using the Pax-I 3D tomograph in two distinct moments, after instrumentation and endodontic treatment applying different mA values: 3mA, 5mA and 10mA. The criteria for the analysis of the images were the CBTC images versus the gold standard (tooth). It was attributed a scale of five points: 1) there is no mesiopalatine canal surely; 2) there is no mesiopalatine canal probably; 3) incertitude; 4) there is a mesiopalatine canal, probably; 5) there is a mesiopalatine canal surely. The agreement inter and intra observer was calculated using the Kappa ratio. The responses were analyzed by the calculation of the curve of characteristic of operation of the receptor (ROC), determining the values of sensibility, specificity and accuracy of the images’ modality. The obtained values were compared by the ANOVA test, adopting 5% as the level of significance. Results: The obtained Kappa values indicated good and excellent agreement intra and inter observer, the area below the ROC curve (ASC) varied from 0.91 to 0.97, sensibility from 8% to 95%, specificity from 70% to 90% and accuracy from 77,5% to 90%. There was no statistic difference between the tested protocols. Conclusion: Within the limits of this study, all the protocols can be applied to the detection of MPC in teeth endodontically treated or nor endodontically treated., being recommended the protocols of a minor dose of radiation.