1000 resultados para Primeiros princípios


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The treatment of animals used in research or in education tests requires proper care, scientific judgment and qualified professionals to understand the needs of the animals and the special requirements of the research, tests, and educational programs. The established guidelines aim the development of knowledge necessary for the improvement of health and wellbeing of humans as well as animals to get precise and accurate results. The techniques should not be performed with inappropriate procedures that cause pain or suffering. Some principles should be considered to have an appropriate animal care and treatment.

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Objective: the purpose of this prospective study was to cephalometrically analyze the dentoalveolar and soft tissue changes after the orthodontic treatment followed by the extraction of four premolars. Material and methods: the sample was comprised by 30 Class II division 1 patients with mean initial age of 12 years and 4 months. Two lateral cephalograms were obtained from each patient at the beginning and at the end of the treatment. The variables analyzed were the nasalabial changes and upper and lower incisors changes in relation to a vertical and horizontal x and y reference lines. Results: upper and lower incisors retraction was 3.4 and 1.8mm, respectively. The SNA angle was decresead by 1.7 degrees followed by a retraction of point A mainly due to the upper incisor retraction. There was a significant decrease of the Wits and ANB variables. There was an increase in the lower anterior facial height. Upper incisor retraction was followed by an increase in the nasolabial angle (ratio 1:2.8 degrees). However, a wide range of individual variability was found. Conclusions: the present study did not support the simple expectation that treatment with extractions of four premolars will result in a dished in face. It appeared that facial changes were more related to a normal facial growth, the amount of incisor retraction and the anchorage control during the upper and lower incisor.

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Pós-graduação em Artes - IA

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

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Pós-graduação em Engenharia Elétrica - FEB

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

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Pós-graduação em Comunicação - FAAC

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Pós-graduação em Educação - IBRC

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)