532 resultados para Resinas Compostas


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Pós-graduação em Ciências Sociais - FFC

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Pós-graduação em Engenharia Civil - FEIS

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Pós-graduação em Odontologia Restauradora - ICT

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Pós-graduação em Ciências Biológicas (Botânica) - IBB

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Pós-graduação em Odontologia - ICT

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Aiming to investigate in vitro the behavior of esthetic veneers placed in crows and made of the laboratory resins Artglass and Targis when submitted to insertion and removal of circunferential cobalt-chromium clasps, 24 veneer crowns were made (twelve with Artglass (Heraeus Kulzer) and twelve with Targis (Ivoclar Vivadent)), as well as the respective cobalt-chromium clasps. The crowns were then submitted to five thousand cycles of clasps insertion and removal, using a proper device. Using the verification of the force necessary to remove the clasps over the crowns during the experiment, the clasps and crowns mass variation, and the macroscopic inspection of the veneers, one may conclude that the veneers did not show a significant variation of the force required to remove the clasps over the crowns; they show a little amount of abrasion, possible to detect using a visual inspection and they show a little and variable amount of mass loss, less for that made with Artglass (average of 0,002g) and greater for that made with Targis (average of 0,006g)

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In the present work it was studied the behavior of four water bath curing cycles of heat activated acrylic resin considered as long duration (I – 65ºC for 30 min;50ºC for 23h and 30min; and 100º C for 1h; II- 50ºC for 24h and the rapid cycle), compared to the known long time curing cycle (9 hours for 72ºC) and short curing cycle (1 h for 65ºC; 30 min to elevate at 100º C and 1:00 to 100º C). Analysis consisted of observations and verification of the residual monomer, weight alterations, dimensional, dimensional lineal, porosity and hardness to determine material performance. The results pointed out that residual monomer presented statistical significant differences in the factor storage and interaction among the factors cycle X storage for weight alteration; statistical significant differences for the factor storage for lineal dimensional alterations, without significant differences for hardness. Porosity was verified in minimum degree in the cycle III and in appreciable amount in the cycle IV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Introduction: Baseball is a Sport disputed by two teams composed at least by nine players which compete between themselves in a game of six innings in the amateur game, for children up to 10 years old. Objective: The objective is to compare the movement degrees of the shoulder joint between the dominant and the non dominant shoulder. Methods: Eleven male subjects were assessed (8,63 ± 0,67 years old) whom practiced baseball at the Nikkey Club of the city of Marília – SP. All of the subjects were assessed by the same examiner, whom measured the range of motion (ROM) of both glenohumeral joint. The Student t test was used for the comparison of the shoulders, with level of significance of 5% (p≤0,05). Results: The subjects presented significant differences on the external rotation movement (p= 0,014) between the dominant shoulder (63,63 ± 12,92°) and the non dominant shoulder (55,45 ± 16,27°), and in the internal rotation movement (p= 0,001) between the dominant shoulder (32,90 ± 5,68°) and the non dominant shoulder (40,72 ± 5,74°). Conclusion: The results obtained in this study, on the experimental conditions utilized, allow us to conclude that the practice of baseball influence the range of motion of external rotation and internal rotation of the dominant shoulder, with increased external rotation, and a decreased internal rotation, provoking instability of the shoulder joint.