The aim of this study was to evaluate the amount of deformation from compression caused by different diameters of Morse taper implants and the residual deformation after load removal. Thirty Morse taper implants lacking external threads were divided into 3 groups (n = 10) according to their diameter as follows: 3.5 mm, 4.0 mm and 5.0 mm. Two-piece abutments were fixed into the implants, and the samples were subjected to compressive axial loading up to 1500 N of force. During the test, one strain gauge remained fixed to the cervical portion of each implant to measure the strain variation. The strain values were recorded at two different time points: at the maximum load (1500 N) and 60 seconds after load removal. To calculate the strain at the implant/abutment interface, a mathematical formula was applied. Data were analyzed using a one-way Anova and Tukey’s test (α = 0.05). The 5.0 mm diameter implant showed a significantly lower strain (650.5 μS ± 170.0) than the 4.0 mm group (1170.2 μS ± 374.7) and the 3.5 mm group (1388.1 μS ± 326.6) (p < 0.001), regardless of the load presence. The strain values decreased by approximately 50% after removal of the load, regardless of the implant diameter. The 5.0 mm implant showed a significantly lower strain at the implant/abutment interface (943.4 μS ± 504.5) than the 4.0 mm group (1057.4 μS ± 681.3) and the 3.5 mm group (1159.6 μS ± 425.9) (p < 0.001). According to the results of this study, the diameter influenced the strain around the internal and external walls of the cervical region of Morse taper implants; all diameters demonstrated clinically acceptable values of strain.

This descriptive, epidemiologic study aimed at identifying the prevalence of alcohol use among the homeless population. Data collection was performed using AUDIT with 245 men living on the streets of Belo Horizonte. It was found there is a high frequency of harmful alcohol use pattern with probable dependence in mature adults and a high rate of risk pattern for those living on the streets for over 6 years and among those sleeping in public areas. This study highlights the importance of building health policies that are aimed at the homeless population.

Este estudio epidemiológico de carácter descriptivo, buscó conocer la prevalencia de consumo de alcohol entre la población en situación de calle. Para la recolección de datos se utilizó el AUDIT con 245 hombres en situación de calle en Belo Horizonte. Se verifica mayor frecuencia del uso nocivo y probable dependencia en adultos maduros y mayor frecuencia del estándar de riesgo para los que viven en situación de calle por período superior a 6 años y entre los que duermen en la vía pública. Este estudio realza la importancia de construcción de políticas de salud orientadas a la población en situación de calle.

Este estudo epidemiológico, de tipo descritivo, buscou conhecer a prevalência de consumo de álcool entre a população em situação de rua. Para coleta de dados, utilizou-se o AUDIT com 245 homens em situação de rua, de Belo Horizonte. Verificou-se maior frequência do uso nocivo e provável dependência nos adultos maduros e maior frequência do padrão de risco para aqueles que vivem em situação de rua, em período superior a 6 anos, e entre os que dormem em vias públicas. Este estudo realça a importância da construção de políticas de saúde voltadas para a população em situação de rua.

Objetivo: Este estudo objetiva avaliar a prevalência de depressão entre a população de rua. Métodos: Realizado estudo transversal com homens adultos em situação de rua de Belo Horizonte. Para coleta de dados, foi utilizado o Inventário de Depressão de Beck e análise foi realizada por meio da estatística descritiva. Resultados: Evidenciam-se alta prevalência de depressão e o grau de severidade dos sintomas depressivos relacionados à faixa etária, tempo de moradia na rua, local onde dorme, relato de problema de saúde e uso de medicamento da população masculina adulta em situação de rua. Conclusão: O presente estudo ressalta a importância de construção de políticas de saúde voltadas para a população de rua.

Objective: This study aims to evaluate the prevalence of depression among the homeless population. Methods: A cross-sectional study was conducted with adult men in the streets of Belo Horizonte. To collect data we used the Beck Depression Inventory and analysis was performed using descriptive statistics. Results: Shows a high prevalence of depression and severity of depressive symptoms related to age, full-time dwelling on the street, where he sleeps, reported health problems and medication use in the adult male population in the streets. Conclusion: This study emphasizes the importance of building health policies for the homeless.

O objetivo desse estudo foi avaliar a influência de diferentes terapias periodontais na integridade de restaurações indiretas por meio de microscopia eletrônica de varredura (MEV). Sessenta raízes bovinas foram selecionadas e aleatoriamente divididas em 12 grupos. Preparos cavitários inlay foram realizados na região cervical central da junção cemento-esmalte e restaurados com resina laboratorial cimentado com cimento resinoso. Doze terapias periodontais foram usadas (n=5): C-sem tratamento (controle); MS-raspagem manual com cureta Gracey; US-raspagem com ultra-som; PP- profilaxia com pasta profilática; PS-profilaxia com pedra pomes; SBJ-jato de bicarbonato; MS/PP; MS/PS; MS/SBJ; US/PP; US/PS; US/SBJ. As amostras foram preparados e submetidas a MEV. Imagens, de ×100 a ×1000, da superfície da resina laboratorial e da interface das restaurações indiretas foram obtidas. As imagens foram avaliadas em procedimento cego por 3 observadores habilitados previamente calibrados seguindo os seguintes critérios: ranhuras, microcavidades e fratura de margem. Os resultados mostraram que a profilaxia com pedra pomes promoveu ranhuras na superfície das restaurações. Raspagem manual e ultrasônica promoveram ranhuras e fratura de margem das restaurações. Jato de bicarbonato resultou em degradação de cimento resinoso. Os resultados sugeriram que, exceto a profilaxia com pasta profilática, todos os procedimentos resultaram em efeitos deletérios na integridade da margem das restaurações indiretas.

The aim of this study was to evaluate the influence of different periodontal therapies on the integrity of indirect restorations by scanning electron microscopy (SEM). Sixty single-rooted bovine teeth were selected and randomly assigned to 12 groups. Inlay cavities were prepared in the cervical region on the center of the cementoenamel junction, and were restored with laboratory processed resin and luted with a resin cement. Twelve periodontal therapies were used (n= 5): C: control (no treatment); MS: manual scaling with Gracey curettes; US: ultrasonic scaling; PP: prophylaxis with prophylactic paste; PS: prophylaxis with pumice-stone; SBJ: sodium bicarbonate jet; MS/PP; MS/PS; MS/SBJ; US/PP; US/PS; US/SBJ. The specimens were prepared and analyzed by SEM. SEM micrographs at ×100 to ×1000 magnification were obtained from the surface of the laboratory resin and the interface of the indirect restorations. The images were evaluated by 3 skillful, calibrated, blinded observers as to the presence of grooves, microcavities and fracture of margins. The results showed that PS produced groves on restoration surface. MS and US produced groves and marginal fractures on the restorations. SBJ resulted in resin cement degradation. These results suggest that except for PS, all procedures had deleterious effects on the marginal integrity of indirect restorations.

The aim of this study was to evaluate the influence of a low-viscosity bonding resin applied over a self-etching adhesive system on the microtensile bond strength (µTBS) of indirect restorations. Comparisons were made using One Up Bond F (OB) self-etching adhesive system, Single Bond (SB) one-bottle adhesive system and Scotchbond Multi Purpose Plus (SMP) bonding component. Thirty bovine incisors were extracted and decoronated at the cementoenamel junction. The labial surfaces were ground so that superficial dentin and deep dentin were exposed. The specimens were randomized to three groups (n=10): G1- OB; G2- OB + SMP; G3- SB. In G2, a layer of the SMP bonding was applied over the OB adhesive system. Indirect composite restorations were bonded using dual-cure cement under 500 g load for 5 min. The specimens were serially sectioned with a bonding area of ± 1.0 mm² in 3 regions: enamel (E), superficial dentin (SD) and deep dentin (DD). The sticks were fixed with cyanoacrylate adhesive and submitted to µTBS test at a crosshead speed of 0.5 mm/min in a mechanical testing machine (EMIC DL 2000). The fractured specimens were examined under scanning electron microscopy to determine the failure mode. Data were analyzed by one-way ANOVA followed by Tukey's test (p<0.05). µTBS means (in MPa) were: G1/E: 15.5 ± 3.5b; G1/SD: 22.7 ± 7.6a; G1/DD: 19.4 ± 9.4a; G2/E: 15.9 ± 5.8b; G2/SD: 19.9 ± 6.9a; G2/DD: 15.3 ± 4.9a; G3/E: 23.2 ± 7.3a; G3/SD: 20.4 ± 8.2a; G3/DD: 19.1 ± 8.7a. The results showed that the use of a low viscosity bonding resin did not affect the µTBS means when associated with a self-etching adhesive system. The self-etching adhesive system was significantly more efficient in dentin than in enamel, while the one-bottle system was significantly more efficient in enamel when compared to the self-etching adhesive system.