Percepción y aceptación del uso de polihexanida al 0.2% versus digluconato de clorhexidina al 0.12% en pacientes con riesgo de desarrollar mucositis oral.

Objective: To evaluate the perception and acceptance of using polyhexanide (PHMB) and chlorhexidine digluconate (CLX) in individuals at a risk of developing oral mucositis induced by chemoradiotherapy.  Materials and Methods: This is a randomised comparative study. Participants were randomised into two groups: Group 1 (PHMB 0.2%) and Group 2 (CLX 0.12%), these groups performed a mouth rinse with the respective solutions for 1 minute every 12 hours during an antineoplastic treatment cycle. The participants were evaluated at three different times: before (t0), during (t1) and after a cycle of antineoplastic treatment (t2). Severity of oral mucositis (OM), mouth pain, quality of life (OHIP-14), oral hygiene index and assessment of the acceptance of the substances in the mouth were assessed. Results: There were 23 individuals, 12 in Group 1 (G1) and 11 in Group 2 (G2). Both groups presented with OM in all three evaluations. Reported mouth pain was lower in G1 than in G2. The PHMB had a better acceptance (p=0.012) than the CLX for the time of mouth rinse at t0. There was a lower impact in the quality of life from oral health in the physical pain aspect (p=0.019) and in social incapacity (p=0.037) in G1 than in G2. Conclusions: PHMB has the same acceptance compared to CLX and is a good option for antiseptic mouth rinse with less adverse effects.Objetivo: Evaluar la percepción y aceptación del uso de polihexanida (PHMB) y digluconato de clorhexidina (CLX) en individuos con riesgo de desarrollar mucositis oral inducida por quimiorradioterapia. Materiales y Métodos: Eeste es un estudio comparativo aleatorizado. Los participantes fueron asignados al azar en dos grupos: Grupo 1 (PHMB 0.2%) y Grupo 2 (CLX 0,12%), estos grupos realizaron un enjuague bucal con las soluciones respectivas durante 1 minuto cada 12 horas durante un ciclo de tratamiento antineoplásico. Los participantes fueron evaluados en tres momentos diferentes: antes (t0), durante (t1) y después de un ciclo de tratamiento antineoplásico (t2). Se evaluaron la gravedad de la mucositis oral (OM), el dolor de boca, la calidad de vida (OHIP-14), el índice de higiene oral y la evaluación de la aceptación de las sustancias en la boca. Resultado: Hubo 23 individuos, 12 en el Grupo 1 (G1) y 11 en el Grupo 2 (G2). Ambos grupos presentaron OM en las tres evaluaciones. El dolor de boca informado fue menor en G1 que en G2. El PHMB tuvo una mejor aceptación (p=0.012) que el CLX para el momento del enjuague bucal en t0. Hubo un impacto menor en la calidad de vida de la salud bucal en el aspecto del dolor físico (p=0.019) y en la incapacidad social (p=0.037) en G1 que en G2. Conclusion: PHMB tiene la misma aceptación en comparación con CLX y es una buena opción para el enjuague bucal antiséptico con menos efectos adversos

Análise de superfície da cerâmica de dissilicato de lítio por microscopia de força atômica e microscopia óptica

Objective: The primary objective of this study was to evaluate the roughness of CAD/CAM blocks of lithium disilicate glass-ceramic (IPS e.max CAD, Ivoclar Vivadent®, Schaan, Liechtenstein), before and after surface treatment with hydrofluoridric acid 10% and after silane coating by Atomic Force Microscopy and Optical Microscopy. The average size of silane as well as its fit to the valleys after acid etching was also studied. Methods: Ten specimens of CAD/CAM blocks of lithium disilicate glass-ceramic were analyzed by Atomic Force Microscopy. Before surface treatment with hydrofluoridric acid 10%, the specimens were also analyzed by Atomic Force Microscopy. All specimens were also analyzed by Optical Microscopy after the application of a layer of silane. Free software Gwyddion version 2.51 was used on data processing. The 3D surface measurements were: root mean square roughness, average roughness, maximum peak height, maximum pit depth, maximum height, Skewness and Kurtosis of surface and profile roughnesses. Images provided by Optical Microscopy were used to calculate the size of the silane particle, also using the free software Gwyddion version 2.5.1. Non-parametric tests were done by the free software R version 3.5.1. Results: Surface roughness and profile roughness were numerically different, but both increased after acid etching. All the skewness measurements concentrated around zero, indicating a more symmetrical behavior after acid conditioning. Silane cross-sectional area measured from 0,0374m² to 0,424351m² and its radius ranged from 0,115m to 0,3675m and could fit in on about 77,5% of the conditioned surface valleys. Significance: Roughness surface and silane layer are important factors to the bond strength between ceramic and resin cements, ensuring the success of restorative treatment.Objetivo: O principal objetivo deste estudo in vitro foi analisar a rugosidade de superfície de blocos de CAD/CAM de cerâmica de dissilicato de lítio, antes e depois do condicionamento com ácido fluorídrico a 10% durante 20 segundos e após a aplicação de uma camada de silano, usando a Microscopia de Força Atômica e Microscopia Óptica. A média do tamanho do silano e como eles se ajustam nos vales da superfície condicionada também foram estudados. Metodologia: 10 amostras confeccionadas por blocos para CAD/CAM de cerâmica de dissilicato de lítio foram analisadas por um microscópio de força atômica. Depois do tratamento de superfície com ácido fluorídrico a 10% durante 20 segundos, os espécimes foram novamente analisados por Microscopia de Força Atômica. Todas as amostras foram analisadas em microscópio óptico depois da aplicação de uma camada de silano. O software Gwyddion (versão 2.5.1) foi usado para o processamento de dados. As medidas obtidas para as imagens 3D das superfícies foram: raiz quadrada média da rugosidade, rugosidade média, altura do pico mais alto, profundidade do vale mais baixo, máxima altura, assimetria e curtose, tanto para a análise de superfície quanto para a análise do perfil. As imagens obtidas pela Microscopia Óptica foram usadas para calcular o tamanho da partícula de silano, também usando o software Gwyddion (versão 2.5.1.). Testes não-paramétricos foram calculados pelo software R (versão 3.5.1). Resultados: As rugosidades da superfície e do perfil foram numericamente diferentes, mas ambas aumentaram após o condicionamento ácido. A assimetria concentrou-se próxima a zero, indicando um comportamento mais simétrico após o condicionamento. A área da secção transversal do silano mede entre 0,0374m² a 0,424351m² e o seu raio mediu entre 0,115m a 0,3675m. Esse tamanho de partícula pode ser acomodado em 77,5% dos vales presentes nas superfícies condicionadas. Significância: A rugosidade e a camada de silano são fatores importantes para o aumento da união entre a cerâmica e o cimento resinoso, assegurando o sucesso do tratamento restaurador

Análise de superfície da cerâmica de dissilicato de lítio por microscopia de força atômica e microscopia óptica

Objective: The primary objective of this study was to evaluate the roughness of CAD/CAM blocks of lithium disilicate glass-ceramic (IPS e.max CAD, Ivoclar Vivadent®, Schaan, Liechtenstein), before and after surface treatment with hydrofluoridric acid 10% and after silane coating by Atomic Force Microscopy and Optical Microscopy. The average size of silane as well as its fit to the valleys after acid etching was also studied. Methods: Ten specimens of CAD/CAM blocks of lithium disilicate glass-ceramic were analyzed by Atomic Force Microscopy. Before surface treatment with hydrofluoridric acid 10%, the specimens were also analyzed by Atomic Force Microscopy. All specimens were also analyzed by Optical Microscopy after the application of a layer of silane. Free software Gwyddion version 2.51 was used on data processing. The 3D surface measurements were: root mean square roughness, average roughness, maximum peak height, maximum pit depth, maximum height, Skewness and Kurtosis of surface and profile roughnesses. Images provided by Optical Microscopy were used to calculate the size of the silane particle, also using the free software Gwyddion version 2.5.1. Non-parametric tests were done by the free software R version 3.5.1. Results: Surface roughness and profile roughness were numerically different, but both increased after acid etching. All the skewness measurements concentrated around zero, indicating a more symmetrical behavior after acid conditioning. Silane cross-sectional area measured from 0,0374m² to 0,424351m² and its radius ranged from 0,115m to 0,3675m and could fit in on about 77,5% of the conditioned surface valleys. Significance: Roughness surface and silane layer are important factors to the bond strength between ceramic and resin cements, ensuring the success of restorative treatment.Objetivo: O principal objetivo deste estudo in vitro foi analisar a rugosidade de superfície de blocos de CAD/CAM de cerâmica de dissilicato de lítio, antes e depois do condicionamento com ácido fluorídrico a 10% durante 20 segundos e após a aplicação de uma camada de silano, usando a Microscopia de Força Atômica e Microscopia Óptica. A média do tamanho do silano e como eles se ajustam nos vales da superfície condicionada também foram estudados. Metodologia: 10 amostras confeccionadas por blocos para CAD/CAM de cerâmica de dissilicato de lítio foram analisadas por um microscópio de força atômica. Depois do tratamento de superfície com ácido fluorídrico a 10% durante 20 segundos, os espécimes foram novamente analisados por Microscopia de Força Atômica. Todas as amostras foram analisadas em microscópio óptico depois da aplicação de uma camada de silano. O software Gwyddion (versão 2.5.1) foi usado para o processamento de dados. As medidas obtidas para as imagens 3D das superfícies foram: raiz quadrada média da rugosidade, rugosidade média, altura do pico mais alto, profundidade do vale mais baixo, máxima altura, assimetria e curtose, tanto para a análise de superfície quanto para a análise do perfil. As imagens obtidas pela Microscopia Óptica foram usadas para calcular o tamanho da partícula de silano, também usando o software Gwyddion (versão 2.5.1.). Testes não-paramétricos foram calculados pelo software R (versão 3.5.1). Resultados: As rugosidades da superfície e do perfil foram numericamente diferentes, mas ambas aumentaram após o condicionamento ácido. A assimetria concentrou-se próxima a zero, indicando um comportamento mais simétrico após o condicionamento. A área da secção transversal do silano mede entre 0,0374m² a 0,424351m² e o seu raio mediu entre 0,115m a 0,3675m. Esse tamanho de partícula pode ser acomodado em 77,5% dos vales presentes nas superfícies condicionadas. Significância: A rugosidade e a camada de silano são fatores importantes para o aumento da união entre a cerâmica e o cimento resinoso, assegurando o sucesso do tratamento restaurador

Perception and acceptance of the use of 0.2% polyhexanide versus 0.12% chlorhexidine digluconate in patients at a risk of developing oral mucositis

Objective: To evaluate the perception and acceptance of using polyhexanide (PHMB) and chlorhexidine digluconate (CLX) in individuals at a risk of developing oral mucositis induced by chemoradiotherapy. Materials and Methods: This is a randomised comparative study. Participants were randomised into two groups: Group 1 (PHMB 0.2%) and Group 2 (CLX 0.12%), these groups performed a mouth rinse with the respective solutions for 1 minute every 12 hours during an antineoplastic treatment cycle. The participants were evaluated at three different times: before (t0), during (t1) and after a cycle of antineoplastic treatment (t2). Severity of oral mucositis (OM), mouth pain, quality of life (OHIP-14), oral hygiene index and assessment of the acceptance of the substances in the mouth were assessed. Results: There were 23 individuals, 12 in Group 1 (G1) and 11 in Group 2 (G2). Both groups presented with OM in all three evaluations. Reported mouth pain was lower in G1 than in G2. The PHMB had a better acceptance (p=0.012) than the CLX for the time of mouth rinse at t0. There was a lower impact in the quality of life from oral health in the physical pain aspect (p=0.019) and in social incapacity (p=0.037) in G1 than in G2. Conclusions: PHMB has the same acceptance compared to CLX and is a good option for antiseptic mouth rinse with less adverse effects.Objetivo: Evaluar la percepción y aceptación del uso de polihexanida (PHMB) y digluconato de clorhexidina (CLX) en individuos con riesgo de desarrollar mucositis oral inducida por quimiorradioterapia. Materiales y Métodos: Eeste es un estudio comparativo aleatorizado. Los participantes fueron asignados al azar en dos grupos: Grupo 1 (PHMB 0.2%) y Grupo 2 (CLX 0,12%), estos grupos realizaron un enjuague bucal con las soluciones respectivas durante 1 minuto cada 12 horas durante un ciclo de tratamiento antineoplásico. Los participantes fueron evaluados en tres momentos diferentes: antes (t0), durante (t1) y después de un ciclo de tratamiento antineoplásico (t2). Se evaluaron la gravedad de la mucositis oral (OM), el dolor de boca, la calidad de vida (OHIP-14), el índice de higiene oral y la evaluación de la aceptación de las sustancias en la boca. Resultado: Hubo 23 individuos, 12 en el Grupo 1 (G1) y 11 en el Grupo 2 (G2). Ambos grupos presentaron OM en las tres evaluaciones. El dolor de boca informado fue menor en G1 que en G2. El PHMB tuvo una mejor aceptación (p=0.012) que el CLX para el momento del enjuague bucal en t0. Hubo un impacto menor en la calidad de vida de la salud bucal en el aspecto del dolor físico (p=0.019) y en la incapacidad social (p=0.037) en G1 que en G2. Conclusion: PHMB tiene la misma aceptación en comparación con CLX y es una buena opción para el enjuague bucal antiséptico con menos efectos adversos

Metal-ceramic partial fixed dentures: a retrospective study

ABSTRACT Objective Metal-ceramic prosthesis are the treatment of choice in oral rehabilitation because of their high survival rates. However, there are few reports in the scientific literature about factors that lead to fractures of metal-ceramic prostheses. The aim of this study was to evaluate whether prostheses units number, abutment type and number, type of the prostheses, prostheses position in the mouth, bruxism and occlusal plaque influence the incidence of fractures in fixed metal-ceramic prostheses. Methods For this study, 16 patients were selected, totaling 74 metal-ceramic prostheses installed between 2000-2010, with follow up of at least four years. Besides dental history, other information was collected, such as patients’ gender and age, prostheses installation date, and the ceramic system used. In case of prostheses fracture, a questionnaire was applied to identify signs of bruxism. A clinical evaluation was done to evaluate the prostheses integrity and opposing dentition characteristics. Success, failure and survival rates were determined. Results The results showed that the success rate of metal-ceramic prostheses was 87.8% and the survival rate was 89.1%. In addition, the success rate was independent of patient age, prostheses installation time, number of prosthesis, number of prosthesis’ units and abutments. The qualitative variables also did not show significant statistical results between success and failure rates. Conclusion It was concluded that metal-ceramic prostheses have high success and survival rates, what guarantees longevity and indication of this type of prostheses in daily practice