Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 4 de 4
Filtrar
Mais filtros










Tipo de estudo
Intervalo de ano de publicação
1.
Rev. Cient. CRO-RJ (Online) ; 3(2): 32-36, May-Aug. 2018.
Artigo em Inglês | LILACS, BBO - Odontologia | ID: biblio-1021859

RESUMO

Objective: to assess the accuracy of the nominal initial diameter of ProTaper Universal® finishing files and their respective gutta-percha cones. Method : ProTaper Universal® finishing files, F1, F2, F3, F4 and F5 and corresponding ProTaper cones were used (10 of each). A Profile Projector was used to evaluate the initial diameter of files and cones. All measurements were repeated twice and performed by a single trained operator. A descriptive analysis of the files' initial diameters was performed considering the tolerance limit established by the ADA number 101. According to this standard, the files F1, F2 and F3 have a tolerance limit of ± 0.025 mm and the files F4 and F5 ± 0.05 mm. The same tolerance limit was used to evaluate the cones. The initial diameters of the instruments and cones studied were compared with the nominal values given by the manufacturer through Student's T test (pd"0.05). Results: No finishing file group showed adequate accuracy (pd"0.05). Accuracy was verified only from the F5 ProTaper cone group (p> 0.05). It was verified that 30% (n=15) of the finishing files and 20% (n = 10) of the cones exceeded the tolerance limits. Conclusion : Accuracy was not observed for any file and it was identified only in the F5 ProTaper Universal® cone. Most files and cones were within the tolerance limits established by the ADA.


Objetivo: Analisar a acurácia do diâmetro inicial dos instrumentos de acabamento do sistema ProTaper Universal® e seus respectivos cones de guta-percha. Método: Foram utilizados instrumentos de acabamento do sistema ProTaper Universal® F1, F2, F3, F4 e F5 e cones de guta-percha ProTaper correspondentes (10 de cada). O projetor de perfil foi usado para avaliar o diâmetro inicial dos instrumentos e cones. Todas as medições foram feitas duas vezes por um único operador treinado. Uma análise descritiva do diâmetro inicial dos instrumentos foi realizada considerando o limite de tolerância proposto pela ADA número 101. De acordo com essa norma, os instrumentos F1, F2 e F3 tem um limite de tolerância de ± 0.025 mm e os instrumentos F4 e F5 ± 0.05 mm. O mesmo limite de tolerância foi utilizado para avaliar os cones. Os diâmetros iniciais dos instrumentos e cones estudados foram comparados com os valores nominais dados pelo fabricante através do teste T (pd"0.05). Resultados: Foi verificada acurácia somente do cone de guta-percha ProTaper do grupo F5 (p>0,05). Nenhum grupo de instrumento de acabamento apresentou acurácia (pd"0,05). Foi verificado que 30% (n=15) dos instrumentos de acabamento e 20% (n=10) dos cones excederam o limite de tolerância. Conclusão: Acurácia não foi verificada em nenhum instrumento ProTaper Universal® e somente o cone F5 apresentou acurácia. A maioria dos instrumentos e cones estavam dentro do limite de tolerância proposto pela ADA.


Assuntos
Endodontia , Tratamento do Canal Radicular , Precisão da Medição Dimensional , Guta-Percha
2.
Acta Odontol Scand ; 75(8): 584-587, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28799814

RESUMO

OBJECTIVE: Implantable cardioverter defibrillators (ICDs) are subject to electromagnetic interference (EMI). The aim of this study was to assess both the EMI of dental equipments with ICDs and related factors. MATERIALS AND METHODS: High- and low-speed handpieces, an electric toothbrush, an implant motor and two types of ultrasonic devices were tested next to an ICD with different sensitivity settings. The ICD was immersed in a saline solution with electrical resistance of 400-800 ohms to simulate the resistance of the human body. The dental equipments were tested in both horizontal (0°) and vertical (90°) positions in relation to the components of the ICD. The tests were performed with a container containing saline solution, which was placed on a dental chair in order to assess the cumulative effect of electromagnetic fields. RESULTS: The dental chair, high- and low-speed handpieces, electric toothbrush, implant motor and ultrasonic devices caused no EMI with the ICD, irrespective of the program set-up or positioning. No cumulative effect of electromagnetic fields was verified. CONCLUSIONS: The results of this study suggest that the devices tested are safe for use in patients with an ICD.


Assuntos
Desfibriladores Implantáveis , Equipamentos Odontológicos/efeitos adversos , Campos Eletromagnéticos/efeitos adversos , Impedância Elétrica/efeitos adversos , Humanos , Ultrassom
3.
J Dent ; 46: 68-72, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26765669

RESUMO

OBJECTIVES: Assess the electromagnetic interference (EMI) of endodontic equipment with cardiovascular implantable electronic devices (CIEDs) and related factors. METHODS: The laser device, electronic apex locators (EAL), optical microscope, endodontic rotary motors, gutta-percha heat carrier (GH), gutta-percha gun and ultrasonic device were tested next to CIEDs (Medtronic and Biotronik) with varied sensitivity settings and distances. CIEDs were immersed in a saline solution to simulate the electrical resistence of the human body. The endodontic equipment was tested in both horizontal and vertical positions in relation to the components of the CIED. The tests were performed on a dental chair in order to assess the cumulative effect of electromagnetic fields. RESULTS: It was found no EMI with the Biotronik pacemaker. EALs caused EMI with Medtronic PM at a 2 cm distance, with the NSK(®) EAL also affecting the Medtronic defibrillator. GH caused EMI at 2 cm and 5 cm from the Medtronic defibrillator. EMI occurred when devices were horizontally positioned to the CIED. In the majority of the cases, EMI occurred when the pacemaker was set to maximum sensitivity. There was cumulative effect of electromagnetic fields between GH and dental chair. CONCLUSIONS: EALs and GH caused EMI which ranged according to type and sensitivity setting of the CIEDs and the distance. However, no endodontic equipment caused permanent damage to the CIED. The use of GH caused a cumulative effect of electromagnetic fields. It suggests that during the treatment of patients with CIEDs, only the necessary equipments should be kept turned on. CLINICAL RELEVANCE: Patients with CIEDs may be subject to EMI from electronic equipment used in dental offices, as they remain turned on throughout the treatment. This is the first article assessing the cumulative effect of electromagnetic fields.


Assuntos
Desfibriladores Implantáveis , Campos Eletromagnéticos/efeitos adversos , Endodontia/instrumentação , Falha de Equipamento , Impedância Elétrica , Equipamentos e Provisões Elétricas , Eletrodos Implantados , Radiação Eletromagnética , Análise de Falha de Equipamento/métodos , Guta-Percha , Humanos , Técnicas In Vitro , Marca-Passo Artificial , Preparo de Canal Radicular/instrumentação
4.
Braz. dent. sci ; 19(2): 116-120, 2016. ilus
Artigo em Inglês | LILACS | ID: lil-788623

RESUMO

There is low incidence of trauma inposterior teeth, and their complications are rarely reported in the literature. This report describes a case of internal root resorption with communication with the periodontal area as a result of traumatic dental injury of a permanent molar tooth. Case Report: The treatment consisted of chemo-mechanical preparation and the use of calcium hydroxide as intracanal medication, followed by filling and sealing of the resorption area with mineral trioxide aggregate. Results: After 5 years of follow-up, the tooth was in function, without signs or symptoms and the resorption area was repaired. Conclusion:We emphasize the importance of follow-up in cases of dental trauma, even in cases of low severity, such as subluxative injury, in order to predict possible sequelae in advance. The correct approach to treatment of the resorption area and sealing with mineral trioxide aggregate ensured the successful out come of the case...


Há uma baixa incidência de trauma nos dentes posteriores e as suas complicações são raramente relatadas na literatura. Este relato descreve um caso de reabsorção radicular interna com comunicação com a área periodontal como resultado de trauma dentário de um molar permanente.Relato de Caso: O tratamento consistiu no preparo químico-mecânico e a uso de hidróxido de cálcio como medicação intracanal, seguido por enchimento e selamento da área de reabsorção com agregado trióxido mineral. Após 5 anos de acompanhamento,o dente estava em função, sem sinais ou sintomas e a área de reabsorção reparada. Conclusão:Ressaltamos a importância do acompanhamento em casos de trauma dentário, mesmo em casos de baixa severidade, como a subluxação, a fim de prever possíveis sequelas com antecedência. A abordagem correta para o tratamento da área de reabsorção e o selamento com agregado trióxido mineral assegurou o sucesso do caso...


Assuntos
Humanos , Dente Molar , Traumatismos Dentários , Dentição Permanente
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...