Objective This study aimed to analyze the effectiveness of three irrigation systems: EndoActivator, passive ultrasonic irrigation (PUI), and Easy Clean in the reduction of Enterococcus faecalis, after instrumentation with the reciprocating system, through microbiological collection and culture method. Materials and Methods A total of 60 extracted human lower premolars were used and standardized at 16 mm in length. The teeth were accessed, contaminated with E. faecalis, and incubated for 21 days at 37°C. Initial collections (S1) were made with an absorbent paper cone to confirm the contamination; subsequently, instrumentation was performed with WaveOne Primary. The teeth were divided into four groups according to the final irrigation protocol (n = 15): group 1. EndoActivator; group 2, PUI; group 3, Easy Clean; and group 4, control group irrigated with saline solution sterile and without agitation. In the final irrigation, the agitation of the 17% ethylene amine tetra-acetic acid (EDTA) solutions was used, then 2.5% sodium hypochlorite (NaOCl); in both for this, three cycles of 20 seconds each. After the chemical–mechanical preparation and agitation of the irrigating solutions, the final collections (S2) for counting the colony-forming units (CFU/mL) occurred. Results The Kruskal–Wallis test revealed that all the agitation systems reduced by 100% and the control group by 65.7%. Conclusion The control group presented a significantly higher amount of CFU/mL after the chemical–mechanical preparation than the other groups, which were similar to each other (p > 0.05).
ResumoA terapia endodôntica de dentes com morte pulpar e rizogênese incompleta é complexa representando um desafio aos endodontistas, exigindo muita habilidade profissional. E para esses casos, uma alternativa promissora vem sendo muito utilizada, conhecida como regeneração ou revascularização pulpar. Esta técnica é menos invasiva quando comparada a técnica tradicional (apicificação), sendo que na revascularização pulpar por meio de um estímulo ocorre a invaginação de um novo tecido para o interior do canal, permitindo assim a regeneração dos tecidos danificados, devolvendo suas condições fisiológicas de vitalidade. O objetivo deste trabalho será descrever um tratamento de revascularização em um dente permanente jovem com ápice aberto que sofreu necrose pulpar após a ocorrência de um trauma. Conclusão: De acordo com os resultados obtidos; concluímos que houve regressão completa de sintomatologias, involução da fístula sem recidiva, resposta positiva ao teste de vitalidade pulpar, além do contínuo desenvolvimento radicular e regeneração do tecido danificado, comprovando assim a efetividade da técnica. Descritores: Raiz Dentária; Necrose da Polpa Dentária; Hidróxido de Cálcio; Regeneração. AbstractEndodontic therapy of teeth with pulp death and incomplete rhizogenesis is complex, posing a challenge to endodontists, requiring a great deal of professional skill. And for these cases, a promising alternative has been widely used, known as regeneration or pulpal revascularization. This technique is less invasive when compared to the traditional technique (apicification), and in pulpal revascularization by means of a stimulus, the invagination of a new tissue into the canal, thus allowing the regeneration of the damaged tissues, returning their physiological conditions of vitality. The objective of this work will be to describe a treatment of revascularization in a permanent young tooth with open apex that suffered pulp necrosis after the occurrence of a trauma. Conclusion: According to the results obtained; we conclude that there was complete regression of symptoms, involution of the fistula without recurrence, positive response to the pulp vitality test, as well as the continuous root development and regeneration of the damaged tissue, thus proving the effectiveness of the technique. Descriptors: Tooth Root; Dental Pulp Necrosis; Calcium Hydroxide; Regeneration. ResumenEl tratamiento endodóntico de dientes con la muerte de la pulpa y la formación de raíces incompleta es compleja, lo que representa un reto para los endodoncistas, lo que requiere de mucha habilidad profesional. Y en estos casos, una alternativa prometedora ha sido ampliamente utilizado, conocido como la regeneración de la pulpa o la revascularización. Esta técnica es menos invasiva en comparación con la técnica tradicional (apexificación) y la revascularización de pulpa por un estímulo, invaginación de tejido nuevo en el canal, lo que permite la regeneración de tejido dañado, la devolución de las condiciones fisiológicas de la vitalidad. El objetivo de ...
The present study investigated the frequency and magnitude of neutralizing antibodies to rabies virus (RABV) in dogs with and without historic of vaccination in Santa Maria/RS. Group A included serum samples from 440 dogs with recent historic of vaccination against rabies, obtained during the 2015 rabies vaccination campaign. Group B included 300 serum samples from dogs submitted to the Veterinary Hospital of the Universidade Federal de Santa Maria in 2015, whose historic of rabies vaccination was unknown. Serum samples were submitted to the rapid fluorescent focus inhibition test (RFFIT) to detect neutralizing antibodies against RABV. In group A, 70.6% (310/440) of the samples had neutralizing antibody titers ≥0.5 international units per milliliter (IU mL-1), considered an indicative of protection against rabies by the World Health Organization. However, approximately 30% of the dogs did not contain antibodies in adequate levels. In group B, 42.3% (127/300) of the samples contained neutralizing antibody titers ≥0.5IU mL-1 and 57.7% (173/300) were negative or contained titers below of the value considered immunized. These results demonstrate that an important proportion of vaccinated dogs (~30%) did not develop adequate antibody levels, mainly those receiving a single vaccine dose. Serologic testing of animals with unknown historic of vaccination revealed relatively low vaccine coverage in the general dog population. Thus, reformulation of immunization strategies - especially the recommendation of a boost vaccination 30 days after the primary dose - and extension of vaccination campaigns are necessary to reach adequate levels and coverage of immunity against RABV in the canine population.
ResumoO sorriso tem uma valorização fundamental na Odontologia moderna, sendo assim, a beleza é influenciada pelo contorno, forma, simetria, alinhamento e principalmente pela cor dos dentes. O clareamento interno de dentes anteriores escurecidos após tratamentos endodônticos é uma terapia muito constante na prática odontológica. O escurecimento tem como causas principais, traumatismo dentário, abertura cavitária incorreta, resíduos de medicação intracanal, necrose pulpar e presença de materiais obturadores e restauradores na coroa. Apesar de o clareamento interno apresentar esteticamente satisfatórios, pode apresentar como possível efeito colateral a reabsorção radicular cervical externa, que pode prejudicar ou até mesmo inviabilizar a presença do dente na cavidade bucal. Este trabalho tem como objetivo descrever um caso clínico de clareamento dental em um dente sem vitalidade pulpar. Serão enfatizados a forma de tratamento e os procedimentos para a prevenção da reabsorção radicular cervical. Utilizou-se um produto clareador cujo princípio ativo baseava-se na ação do peróxido de hidrogênio a 35%. Conclusão: Condutas como a realização do tampão cervical e a não utilização de materiais rubros e calor durante a manobra clínica do clareamento interno, podem minimizar o risco de reabsorção radicular cervical externa e permitem um resultado estético satisfatório. Este procedimento se constitui em uma técnica simples, de baixo custo e extremamente conservadora. Descritores: Clareamento Dental; Clareadores; Reabsorção da Raiz. AbstractThe smile has a fundamental enhancement in modern dentistry, and thus, the beauty is influenced by the outline, form, symmetry, alignment, and particularly the color of the teeth. The internal whitening front teeth darkened after endodontic treatment is a very constant therapy in dental practice. The main causes of tooth staining are dental trauma, incorrect cavity opening, residues of intracanal medication, pulp necrosis and presence of filling materials or dental restorers in the crown. Although the internal bleaching presents aesthetical satisfactory it's may present as a possible side effect the external cervical root resorption, which can damage or even can unfeasible the presence of teeth in the oral cavity. This paper aims to describe a case of tooth whitening in a nonvital tooth. It is emphasized how the procedures and treatment can be prevent the cervical resorption. We used a whitening product whose active ingredient is based on the action of 35% hydrogen peroxide. Conclusion: conducts such as the realization of the cervical cap and the non-use of crimson materials or heat during clinical maneuver of internal bleaching can minimize the risk of external cervical root resorption and allowed a satisfactory cosmetic result. It constitutes a simple technique, low cost and extremely conservative. Descriptors: Tooth Bleaching; Bleaching Agents; Root Resorption. ResumenLa sonrisa tiene una mejora fundamental con las técnicas odontológicas moderna y por lo tanto, la belleza está influenci...
Context:Postoperative pain control after endodontic treatment is important to maintain patient comfort.Aim:The aim of this prospective clinical study was to evaluate the postoperative symptomatology of endodontic treatments performed in a single session, with or without photodynamic therapy (PDT), using Reciproc #40 file in necrotic unirradicular anterior teeth.Materials and Methods:In a prospective clinical study, 40 teeth indicated for endodontic treatment were treated by a single endodontist according to a preestablished protocol. The teeth were randomly divided into two groups (n = 20): control group (CG) and laser group (LG). After 24 h, 72 h, and 1 week of endodontic treatment, patients' pain symptomatology was evaluated through a Visual Analog Scale (VAS) ranging from 0 to 10, in which 0 corresponds to no pain and 10 indicates extreme pain. In both workgroups, similar protocols were used for instrumentation with the Reciproc system (R40), irrigation with 2.5% sodium hypochlorite, and filling by the gutta-percha plastification technique, in which the CG did not use PDT, and the LG used PDT after the instrumentation sequence. After the visit, the patients were given a prescription for ibuprofen 400 mg to be taken every 6 h if they experienced pain.Results:The results of the study, analyzing the VAS, did not show any difference in pain symptoms between the groups at 24 h, 72 h, and 1 week (P > 0.05).Conclusions:It was concluded that there was no statistical difference between the groups.
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