The results found in this study demonstrated that the Vitapan Classical shade guide tab A2 provided a better color match than the respective shade guide tabs A2 supplied by the composite manufacturers. If custom shade tabs are to be made, however, they could be kept in a box and used as shade references from 14 days after being fabricated, when color stabilizes.

This study featured a methodological quantitative approach and its objective was to validate an instrument on the initial assistance given to burns victims, on medical and nursing knowledge, using the theoretical stage of Pasquali's model. The data were collected in June - August 2008, in two parts: analysis of face validity and content validity by 18 judges; and analysis of internal consistency, undertaken through Item Response Theory, by 42 doctors and nurses from a teaching hospital in the North-West region of the Brazilian state of Paraná. Following the judges' analysis, 35 questions regarding general, medical and nursing knowledge showed agreement above 80% for the concepts. Through the internal consistency analysis applied to the general knowledge questions, three were discarded due to not being correlated with the construct. The remaining seven questions (70%) presented low discrimination of the respondents, varying levels of difficulty, and similar probabilities of correct random guesses. The final instrument contains 32 questions and is available for use.

-The objective of this work was to compare distributions for the modeling of the number and dry matter weight of nodules (DWN) of Rhizobium from different inoculants in common bean (Phaseolus vulgaris) inbred lines subjected to nitrogen doses, as well as to identify the best inoculant for those lines. The experiment was carried out in a randomized complete block design, arranged in split-split plots, with three factors -four inbred lines, five nitrogen doses (0, 20, 40, 60, and 80 kg ha -1 ), and three inoculants (CIAT 899, UFLA 02-100, and peat) -and four replicates. The number of nodules and their dry matter weight were analyzed with the generalized linear mixed modeling approach. The highest number of nodules was obtained with the CIAT 899 inoculant, at the dose of 20 kg ha -1 N (260 nodules), followed by UFLA 02-100, at 80 kg ha -1(109 nodules), and peat alone at 20 kg ha -1 (98 nodules). The DWN with CIAT 899 exceeded in 0.66 g the DWN with UFLA 02-100, and in 0.95 g the DWN obtained without inoculation (inoculated with peat alone). The use of the negative binomial distribution and of the gamma distribution is a simple way to control data overdispersion of the nodule number and data underdispersion of DWN, respectively.Index terms: Phaseolus vulgaris, Rhizobium, symbiotic nitrogen fixation, inoculant, overdispersion, underdispersion. Abordagem de modelos lineares generalizados mistos para analisar nodulação em linhagens de feijoeiro-comumResumo -O objetivo deste trabalho foi comparar distribuições para a modelagem do número e da massa de matéria seca de nódulos (MSN) de Rhizobium de diferentes inoculantes em linhagens de feijoeiro-comum (Phaseolus vulgaris) submetidas a diferentes doses de nitrogênio, bem como identificar o melhor inoculante para essas linhagens. O experimento foi instalado em blocos completos ao acaso, arranjados em parcelas subsubdivididas, com três fatores -quatro linhagens, cinco doses de nitrogênio (0, 20, 40, 60 e 80 kg ha . A MSN com o inoculante CIAT 899 excedeu em 0,66 g a MSN com o UFLA 02-100, e em 0,95 g a MSN obtida sem inoculação (inoculação com turfa apenas). O uso das distribuições bionomial negativa e gama é uma maneira simples de controlar a superdispersão dos dados do número de nódulos e a subdispersão dos dados de MSN, respectivamente.Termos para indexação: Phaseolus vulgaris, Rhizobium, fixação simbiótica de nitrogênio, inoculantes, superdispersão, subdispersão.