Relationship between psychological factors and symptoms of TMD in university undergraduate students

Temporomandibular disorders is a collective term used to describe a number of related disorders involving the temporomandibular joints, masticatory muscles and occlusion with common symptoms such as pain, restricted movement, muscle tenderness and intermittent joint sounds. The multifactorial TMD etiology is related to emotional tension, occlusal interferences, tooth loss, postural deviation, masticatory muscular dysfunction, internal and external changes in TMJ structure and the various associations of these factors. The aim of this study was to evaluate the prevalence of the relationship between signs of psychological distress and temporomandibular disorder in university students. A total 150 volunteers participated in this study. They attended different courses in the field of human science at one public university and four private universities. TMD was assessed by the Research Diagnostic Criteria (RDC) questionnaire. Anxiety was measured by means of a self-evaluative questionnaire, Spielberger's Trait-State anxiety inventory, to evaluate students' state and trait anxiety. The results of the two questionnaires were compared to determine the relationship between anxiety levels and severity degrees of chronic TMD pain by means of the chi-square test. The significance level was set at 5%. The statistical analysis showed that the TMD degree has a positive association with state-anxiety (p=0.008; p<0.05) and negative with trait-anxiety (p=0.619; p<0.05). Moreover, a high TMD rate was observed among the students (40%). This study concluded that there is a positive association between TMD and anxiety.

Disfuncao temporomandibular e o termo usado para descrever uma serie de disturbios envolvendo as articulacoes temporomandibulares, musculos da mastigacao e oclusao, com sintomas comuns como dor, restricao de movimento, sensibilidade muscular e ruido articular intermitente. A etiologia da DTM e multifatorial e esta relacionada a tensao emocional, interferencias oclusais, perda de dentes, desvio postural, disfuncao muscular mastigatoria, mudancas internas e externas na estrutura da ATM, e a diferentes associacoes entre esses fatores. O objetivo deste estudo foi avaliar a relacao entre estresse psicologico e sinais de desordem temporomandibular em estudantes universitarios. Um total de 150 voluntarios participaram deste estudo sendo alunos de uma universidade publica e quatro universidades privadas de diferentes cursos da area de ciencias humanas. A avaliacao da DTM foi realizada por meio do questionario Research Diagnostic Criteria (RDC). Para a avaliacao da ansiedade foi aplicado o questionario Ansiedade Traco-Estado de Spielberger. Os resultados dos niveis de ansiedade e dos graus de DTM dos dois questionarios foram comparados pelo teste do qui-quadrado, com nivel de significancia de 5%. A analise estatistica mostrou que o grau de DTM tem relacao positiva para a Ansiedade-Estado (p = 0,008, p <0,05) e negativa para a ansiedade-traco (p = 0,619, p <0,05), alem disso, foi observado alto indice de DTM entre os estudantes (40%). Por meio dos resultados obtidos e analisados neste estudo, concluiuse que havia uma associacao positiva entre DTM e ansiedade.

Evaluación de la dureza shore a en dos técnicas de impresión con siliconas por condensación bajo la influencia del uso de desinfección química por impresión con solución de clorhexidina al 2 por ciento / Evaluation of hardness in two impression techniques with condensation silicones under influence chemical disinfection with clorhexidine 2 percent

Las siliconas de polimerización por condensación, actualmente, son muy utilizadas en el mercado odontológico. Debido a este hecho, nuestro objetivo fue estudiar la dureza Shore A de dos siliconas de condensación (Zetaplus - Zhermark y Clonage - DFL), simulando dos técnicas de impresión (densa y densa + fluida) bajo la influencia de desinfección química con solución a base de clorhexidina al 2 por ciento (aspersión por 5 minutos). Fueron confeccionados 56 muestras, a partir de matrices metálicas, divididos en 4 grupos para cada técnica de impresión, siendo la mitad de las muestras de cada técnica sometidas a desinfección química. El Test de dureza fue realizada por medio de un durómetro (modelo GSD 709) de acuerdo con las especificaciones D-2240 de la Sociedad Americana para Prueba y Materiales (ASTM), los resultados obtenidos, fueron analizados por medio del Test de análisis de varianza y al Test de Tukey (p<0,05). Se concluyó, que para cualquier condición experimental estudiada se encontró diferencia estadísticamente significativa cuando se analizaron los valores medios de desinfección química, tipo de material y técnica utilizada

Elastomerics materials currently represent a major choice in the dental market as an impression material. The aim of this study was to asses Shore A hardness of two condensation silicones (Zetaplus - Zhermack and Clonage - DFL) using two impression techniques (putty and putty/wash) under influence of chemical disinfection with clorhexidine spray to 2 percent (for five minutes). Fifty-six specimens were made in metallic matrices, subdivided in 4 groups for each impression technique; half of each technique was submitted to chemical disinfection. Hardness test was performed with a durometer (GSD 709) according ASTM specifications (D-2240), the results were submitted to analyses of variance (ANOVA) and Tukey’s test (p<0.05). It was concluded that for all experimental condition, difference statistically significant was found