RESUMO JUSTIFICATIVA E OBJETIVOS: A etiologia das disfunções temporomandibulares engloba fatores locais e sistêmicos, destacando-se a condição oclusal, trauma, atividades parafuncionais e estresse emocional, derivando-se os sinais de ansiedade e de depressão. Esses, por sua vez, apresentam maior propensão em se desenvolver na população universitária devido às mudanças exigidas ao ingressar na universidade e a cobrança por um bom desempenho. O objetivo deste estudo foi avaliar a correlação de sintomas de ansiedade e de depressão e a existência de sintomas associados às disfunções temporomandibulares em estudantes universitários. MÉTODOS: Realizou-se um estudo clínico epidemiológico, aleatório e transversal, cuja amostra foi constituída por 100 estudantes universitários, aos quais foram aplicados os questionários Research Diagnostic Criteria for Temporomandibular Disorders: Eixo II e o Hospital Anxiety and Depression Scale. Para a análise estatística foram utilizados os testes Qui-quadrado e o Modelo de regressão logística. RESULTADOS: Os resultados do presente estudo foram constituídos pelas respostas de 79 mulheres e 21 homens, com média de idade de 19 anos. Foram observadas as seguintes associações: estado de saúde geral e depressão, ansiedade e dor na face/estalos, hábito de ranger/apertar os dentes ao dormir, e resposta “sim” para ansiedade, desconforto com seus dentes e depressão; estado de angustiado/preocupado com todas as questões de ansiedade; depressão e pensamentos sobre morte, dificuldade em respirar e sentir-se desanimado sobre o futuro. CONCLUSÃO: A partir dos dados obtidos foi possível concluir que a presença de sintomas relativos à ansiedade e depressão interferem nos sintomas dolorosos das disfunções temporomandibulares da população abordada.

ABSTRACT BACKGROUND AND OBJECTIVES: The etiology of temporomandibular disorders includes local and systemic factors, with an emphasis on the occlusal condition, trauma, parafunctional activities, and emotional stress, deriving signs of anxiety and depression. These, in turn, are more likely to develop in the university population, due to the changes required when entering university and the demand for good performance. This study aimed to evaluate the correlation between anxiety and depression symptoms and the existence of symptoms associated with temporomandibular disorders in university students. METHODS: An epidemiological, randomized, and cross-sectional clinical study conducted with 100 university students. The Research Diagnostic Criteria for Temporomandibular Disorders: Axis II and the Hospital Anxiety and Depression Scale questionnaires were applied. For the statistical analysis, the Chi-square tests and the Logistic regression model were used. RESULTS: The results of the present study consisted of responses from 79 women and 21 men, with a mean age of 19 years. The following associations were observed: general health status and depression; anxiety and pain in the face/ clicking; habit of grinding/clenching teeth when sleeping, and a “yes” answer to anxiety; discomfort with your teeth and depression; state of anguished/worried about all anxiety issues; depression and thoughts about death, difficulty in breathing and feeling discouraged about the future. CONCLUSION: From the data obtained, it was possible to conclude that the presence of symptoms related to anxiety and depression interfere with the painful symptoms of temporomandibular disorders in the addressed population.

RESUMO Este relatório clínico descreve o tratamento de um paciente insatisfeito com a estética do sorriso devido à presença de dentes estreitos, amarelados e à presença de diastema entre os dentes 11 e 21. O exame clínico revelou ausência das guias de desoclusão. O plano de tratamento consistiu na obtenção de modelos de estudo, montagem em um articulador semi-ajustável e enceramento diagnóstico, para avaliar as possibilidades de um tratamento restaurador. Após a aprovação da viabilidade do procedimento, o clareamento dental foi iniciado em consultório, com 38% de peróxido de hidrogênio, associado ao clareamento caseiro, com 15% de peróxido de carbamida, a fim de reduzir o amarelamento dos dentes. Posteriormente, a avaliação funcional do procedimento restaurador foi realizada através da preparação prévia do mock-up. Após aprovação funcional do mock-up, foi realizada a frenectomia labial, uma vez que o freio era a causa do diastema entre os dentes 11 e 21. Após 4 semanas, foi realizado o procedimento restaurador dos dentes 13 ao 23, com resina composta direta, melhorando a estética do sorriso e restaurando as guias de desoclusão.

ABSTRACT This clinical report describes the treatment of a patient dissatisfied with the esthetics of the smile due to the presence of narrow teeth, yellow and the presence of diastema between teeth 11 and 21. Clinical examination revealed absence of the disocclusion guides. The treatment plan consisted in obtaining study casts, assembly in a semi-adjustable articulator and diagnostic waxing, to evaluate the possibilities of a restorative treatment. After the approved the viability of the procedure, dental bleaching was started in-office with 38% hydrogen peroxide associated with at-home bleaching with 15% carbamide peroxide, in order to reduce the yellowing of the teeth. Afterwards, the functional evaluation of the restorative procedure was carried out through the prior preparation of the mock-up. After functional approval of the mock-up, lip frenectomy was performed, since the frenulum is the cause of the diastema between the teeth 11 and 21. After 4 weeks was carried out the restorative procedure of teeth 13 to 23, with direct composite resin, improving the aesthetics of the smile and restoring the disocclusion guides.

OBJECTIVE: The aims of this study were to examine the trans- and postoperative systemic characteristics of patients undergoing dental implant surgery and to investigate the relationship between pre- and post- surgery anxiety levels. MATERIAL AND METHODS: Thirty-nine patients were analyzed in 3 call centers to determine anxiety levels, pain levels, and preoperative and postoperative histories using the State-Trait (STAI) questionnaire. RESULTS: A total of 93 dental implants were installed, with a success rate of 100%. The most frequently reported systemic disease was hypertension. There was a significantly higher rate of effective clamping (torque) to the mandibular bone than to the maxillary bone. The association between postoperative surgical complications and longer operative time was not significant, but there was a significant correlation between the alteration of mouth opening and daily routine activities and a significant decrease in anxiety levels between the day of surgery and the postoperative time point (p =0.006). CONCLUSION: A longer surgical time was associated with surgery-related complications and with a higher anxiety index on the preoperative evaluation.

Purpose: The aim of this study was to evaluate the effect of a surface treatment with Sofreliner primer on tensile bond strength of a resin-based soft liner (Coe-Soft) bonded to a polymethylmethacrylate (PMMA) resin before and after accelerated aging simulated by a thermocycling machine. Material and Methods: One hundred and twenty rectangular specimens of PMMA resin were fabricated with 10 × 10 mm² of cross-section and 40 mm of height. The resin-based soft liner was positioned between two PMMA resin specimens. The specimens were divided randomly into 6 groups (n = 10) according to the surface treatment and accelerated aging cycles (0, 500 and 1000). After accelerated aging, specimens were submitted to tensile bond strength test. The fractures were classified as adhesive, cohesive or both. Results: Most failures were classified as cohesive (p = 0.025) and there was an increase on the mean values of tensile bond strength for group with primer application regardless the cycles of accelerated aging, and also an increase along thermocycling periods. The scanning electronic microscopy was used to illustrate the types of failures and the effect of primer application on PMMA acrylic resin surface. Conclusion: The primer application associated with resin-based soft liners is clinically viable, once this treatment strategy provides a reliable adhesion.

The aim of this study was to evaluate the effect of thermocycling and immersion in mouthwash or beverage solutions on the color stability of four different acrylic resin-based dentures (Onda Cryl, OC; QC20, QC; Classico, CL; and Lucitone, LU). The factors evaluated were type of acrylic resin, immersion time, and solution (mouthwash or beverage). A total of 224 denture samples were fabricated. For each type of resin, eight samples were immersed in mouthwashes (Plax-Colgate, PC; Listerine, LI; and Oral-B, OB), beverages (coffee, CP; cola, C; and wine, W), and artificial saliva (AS; control). The color change (DE) was evaluated before (baseline) and after thermocycling (T1), and after immersion in solution for 1 h (T2), 3 h (T3), 24 h (T4), 48 h (T5), and 96 h (T6). The CIE Lab system was used to determine the color changes. The thermocycling test was performed for 5000 cycles. Data were submitted to three-way repeated-measures analysis of variance and Tukey's test (p < 0.05). When the samples were immersed in each mouthwash, all assessed factors, associated or not, significantly influenced the color change values, except there was no association between the mouthwash and acrylic resin. Similarly, when the samples were immersed in each beverage, all studied factors influenced the color change values. In general, regardless of the solution, LU exhibited the greatest DE values in the period from T1 to T5; and QC presented the greatest DE values at T6. Thus, thermocycling and immersion in the various solutions influenced the color stability of acrylic resins and QC showed the greatest color alteration.

The use of ocular prostheses for ophthalmic patients aims to rebuild facial aesthetics and provide an artificial substitute to the visual organ. Natural intemperate conditions promote discoloration of artificial irides and many studies have attempted to produce irides with greater chromatic paint durability using different paint materials. OBJECTIVES: The present study evaluated the color stability of artificial irides obtained with two techniques (oil painting and digital image) and submitted to microwave polymerization. MATERIAL AND METHODS: Forty samples were fabricated simulating ocular prostheses. each sample was constituted by one disc of acrylic resin N1 and one disc of colorless acrylic resin with the iris interposed between the discs. The irides in brown and blue color were obtained by oil painting or digital image. The color stability was determined by a reflection spectrophotometer and measurements were taken before and after microwave polymerization. Statistical analysis of the techniques for reproducing artificial irides was performed by applying the normal data distribution test followed by 2-way ANOVA and Tukey HSD test (α=.05). RESULTS: Chromatic alterations occurred in all specimens and statistically significant differences were observed between the oil-painted samples and those obtained by digital imaging. There was no statistical difference between the brown and blue colors. Independently of technique, all samples suffered color alterations after microwave polymerization. CONCLUSION: The digital imaging technique for reproducing irides presented better color stability after microwave polymerization.

Esthetics and durability of materials used to fabricate artificial eyes has been an important issue since artificial eyes are essential to restore esthetics and function, protect the remaining tissues and help with patients' psychological therapy. However, these materials are submitted to degrading effects of environmental agents on the physical properties of the acrylic resin. OBJECTIVE: This study assessed the color stability of acrylic resins used to fabricate sclera in three basic shades (N1, N2 and N3) when subjected to accelerated aging, mechanical and chemical polishing. MATERIAL AND METHODS: Specimens of each resin were fabricated and submitted to mechanical and chemical polishing. Chromatic analysis was performed before and after accelerated aging through ultraviolet reflection spectrophotometry. RESULTS: All specimens revealed color alteration following polishing and accelerated aging. The resins presented statistically significant chromatic alteration (p<0.01) between the periods of 252 and 1008 h. CONCLUSIONS: Both polishing methods presented no significant difference between the values of color derivatives of resins.

We evaluated the effects of disinfection and aging on the hardness of silicones containing opacifiers and intended for use in facial prosthetics. A total of 90 samples were produced using a cylindrical metal mold 3 mm in height and 30 mm in diameter. The samples were fabricated from Silastic MDX 4-4210 silicone in three groups: GI contained no opacifier, GII contained barium sulfate (Ba), and GIII contained titanium dioxide (Ti). The samples were disinfected using effervescent tablets (Ef), neutral soap (Ns), or 4% chlorhexidine (Cl) 3 times a week for 60 days. After this period the samples underwent 1,008 hours of accelerated aging. The hardness was measured using a durometer immediately following the disinfection period and after 252, 504, and 1,008 hours of aging. The data were statistically analyzed using 3-way ANOVA and the Tukey test (p < .05). The GIII group exhibited the greatest variation in hardness regardless of elapsed time. All groups displayed greater hardness after 1,008 hours of accelerated aging independent of disinfectant type. All of the hardness values were within the clinically acceptable range.

Soft linings are materials used to reduce the tension and forces of mastication, forming all or part of the fitting surface of a denture. This study evaluated the effect of thermocycling on water absorption, solubility, Shore A hardness and color stability of permanent soft liner materials. MATERIAL AND METHODS: Two chemically activated soft liner materials (Sofreliner S; GC Reline Ultrasoft) were tested. Twenty cylindrical specimens (30.0 x 1.0 mm) were prepared for measuring water absorption and solubility and another twenty (30.0 x 3 mm) for analyzing Shore A hardness and color stability. Color was measured by a spectrophotometer before and after 2000 thermocycles. A one-way ANOVA test and Tukey test at a 5% confidence level (p<0.05) were performed. RESULTS: The results did not show statistical differences for water absorption, solubility or color stability. The post-thermocycling Shore A hardness values were significantly higher than those before the treatment. CONCLUSION: Thermocycling of soft liner materials increased Shore A hardness.

Objetivo: Los materiales para rebasado tienen como propósito disminuir la tensión, la presión masticatoria en los tejidos de soporte y aumentar la retención de la dentadura, además de ser indicados para prótesis buco-maxilo-faciales. El objetivo de este estudio fue evaluar el efecto del termociclado en los materiales para rebasado blandos considerados definitivos y evaluar las alteraciones en relación a la absorción de agua, solubilidad, dureza Shore A y estabilidad de color. Materiales y Métodos: Dos materiales para rebasado blandos definitivos (Sofreliner S y GC Reline Ultrasoft) fueron examinados. Fueron confeccionados 20 muestras, midiendo 30 mm de diámetro x 1 mm de espesor, aquellos destinados al test de absorción y solubilidad y 20 muestras con 30 mm de diámetro x 3 mm de espesor para dureza y estabilidad de color. Fueron realizados los tests de absorción y solubilidad. La dureza fue medida en un durometro y la estabilidad de color por medio de un espectrofotómetro en los periodos inicial y después de 2000 ciclos de termociclaje. Una vez obtenidos los datos, estos fueron submetidos al análisis de varianza (ANOVA) seguido por el test Tukey (p<0,05). Resultados: En relación a la absorción, solubilidad y estabilidad de color no hubo diferencia estadísticamente significativa entre los materiales, en relación al test de dureza fue constatada una diferencia estadísticamente significativa entre los periodos y los materiales examinados. Conclusión: El termociclaje no interfirió en la absorción, solubilidad y estabilidad de color de los materiales evaluados, sin embargo interfirió de forma significativa en la dureza Shore A. Los materiales tuvieron sus valores promedios de dureza aumentados después del termociclaje.

El Instituto Nacional de Estudio e Investigación del Ministerio de Educación afirmó tener 169 facultades de odontología en el 2006. En la facultad de odontología de Araçatuba, UNESP, la disciplina de Bioestadística está incluida en el curso con 90 horas de crédito por un año. La interrelación con otros profesores fue desarrollada usando la base de datos de campos odontológicos diferentes. El objetivo de esta pesquisa es examinar la enseñanza de bioestadística en todas las facultades de odontología de Brasil. La metodología aplicada fue enviar el cuestionario a todos los coordinadores de los cursos. Dando como resultado 80 cuestionarios respondidos, 48 indicaron la inclusión de bioestadística en sus programas curriculares. Solamente en 3 escuelas la Bioestadística es enseñada durante todo el año de "61 a 90" horas. La enseñanza de Bioestadística debe ser incentivada en todas las facultades de odontología en Brasil, de modo que, pueda despertar el interés de estas, con respecto a la inclusión de la disciplina de bioestadística en su programa curricular.

The National Institute of Study and Research of the Ministry of Education in Brazil states that there are 169 Schools of Dentistry in 2006. At the School of Dentistry of Araçatuba, UNESP, Brazil, this Biostatistics discipline is included in the course with 90 credit hours a year. An interrelationship with other professors has been developed for some years using database of different dental fields. The aim of this research is to get acquainted with the teaching of Biostatics at schools of dentistry in Brazil. The methodology applied was to send the questionnaire to all the coordinators of the courses. As for the result of 80 questionnaires answered, 48 stated the inclusion of Biostatistics in their program studies. Only in 3 schools Biostatistics is taught all over the year in "61 to 90" hours. The conclusion is that the teaching of Biostatistics must be incentivated in all schools of dentistry in Brazil.