Les modèles sensorimoteurs de la cognition envisagent les connaissances comme des patterns neuronaux distribués sur l’ensemble du cerveau incluant les aires sensorielles. Différents travaux ont confirmé que l’accès à des connaissances associées à une couleur (e.g., banane) recrute un réseau neuronal similaire à celui impliqué dans la perception des couleurs. En conséquence, il est possible que l’utilisation de structures communes implique une interaction entre l’accès aux connaissances et la perception de la couleur. Pour mettre à l’épreuve cette hypothèse, la procédure utilisée consistait à présenter rapidement une amorce impliquant une simulation de la couleur (e.g., dessin d’une banane en noir et blanc) suivie d’une cible de couleur congruente (jaune) ou non (vert) sur laquelle les participants devaient réaliser un traitement perceptif (i.e., tâche de discrimination chromatique). Nous nous attendions à observer un amorçage perceptif de la couleur. Nous avons réalisé sept expériences au cours desquelles nous avons fait varier différents facteurs comme le type d’amorces (images, mots), le SOA ou encore le type de tâches perceptives. Les résultats obtenus montrent que la simulation de la couleur peut influencer la perception à un niveau perceptif, du moment que la tâche sur les cibles nécessite uniquement un traitement perceptif et que le lien de congruence amorce/cible est manipulé au niveau précis des teintes. Sinon, l’amorçage obtenu semble être de nature lexicale. Nous discutons de l’implication de ces résultats pour (i) l’interaction connaissance/perception, (ii) la nature des processus impliqués dans la perception des couleurs et (iii) dans la représentation mnésique des couleurs. / Sensorimotor models of cognition consider knowledge as neural patterns distributed over the entire brain, including the sensory areas. Various studies have confirmed that access to knowledge associated with a color (e.g., banana) recruits a neural network similar to that involved in color perception. Consequently, it is possible that the use of common structures involves an interaction between access to knowledge and perception of color. To test this hypothesis, the procedure used was to quickly present a prime involving a simulation of the color (e.g., A black-and-white line drawing of a banana) followed by a congruent target color (yellow) or not (green) on which participants were asked to perform a perceptual processing (i.e., color discrimination task). We expected to observe a perceptual priming of color. We conducted seven experiments in which we varied different factors such as the type of primes (pictures, words), the SOA or the type of perceptual tasks. The results show that simulation can influence color perception at a perceptual level, as long as the task on the target requires only perceptual processing and the congruency link between prime and target is handled at the level of specific hues. Otherwise, the priming obtained seems to be of a lexical nature. We discuss the implications of these results for (i) the knowledge/perception interactions, (ii) the nature of the processes involved in color perception and (iii) in the mnemonic representation of colors.

Master of Science / Food Science / Terry Houser / The objective of this research was to evaluate the effect of natural nitrites on objective color of vacuum packaged fresh pork. Sections of longissimus dorsi muscle (approximately 18 cm) were injected with solutions containing 0, 3, 6, 9 or 12 ppm of natural nitrite. Sections were sliced into chops (2.54 cm) and individually vacuum packaged. Raw chop surface L*, a* and b* values were measured at 1, 5, 15 and 30 days post packaging. At 1, 15 and 30 days post packaging chops were cooked and surface L*, a* and b* values were measured. Hue and Chroma values were calculated for all color measurements. Linear and quadratic contrasts were evaluated on treatments for all measured and calculated color values. A linear (P<0.05) increase was detected on the L* values for days of vacuum storage treatment, all other raw color measurements and calculations for levels of natural nitrite and days of vacuum package storage were found to be quadratic (P<0.05). Cooked L* and Hue values for days of vacuum storage were found to decrease linearly (P<0.05), all other days of storage and levels of nitrite treatments were found to be quadratic (P<0.05) in relationship to the measured and calculated cooked color values. All raw chops containing nitrite had higher a* and Chroma values at all evaluation days than those containing no added nitrite. Raw chops containing nitrite had lower L*, higher b* and Hue values than the 0 ppm chops (P<0.05). Raw chops containing natural nitrite were darker, redder, more yellow and more intense in color than those without nitrite. The longer the chops were vacuum packaged and then cooked, the lower the L* values were (P<0.05). Cooked chops containing nitrite were redder, less yellow and lower in Hue and Chroma values than cooked chops with no added nitrite P(<0.05). These results indicate that low levels of nitrite can alter fresh and cooked pork color during vacuum storage. To balance the increased redness and darkness of the raw chops with the increased redness of the cooked chops, 3 ppm of natural nitrite was found to be the optimal treatment.

Call number: LD2668 .T4 1986 P57 / Master of Science / Animal Sciences and Industry

Although dark coat color in dogs has been theorized as a risk factor for thermal stress, there is little evidence in the scientific literature to support that position. We utilized 16 non-conditioned Labradors (8 black and 8 yellow) in a three-phase test to examine effects of coat color on thermal status of the dog. Rectal, gastrointestinal (GI), surface temperature, and respiration rates measured in breaths per minute (bpm), were collected prior to (Baseline – phase 1) and immediately after a controlled 30-minute walk in an open air environment on a sunny day (Sunlight – phase 2). Follow up measurements were taken 15 minutes after walking (Cool down – phase 3) to determine post-exposure return to baseline. No effect of coat color was measured for rectal, gastrointestinal, surface temperature, or respiration (P > 0.05) in dogs following their 30-minute walk. Temperatures increased similarly across both coat colors (rectal 1.88 °C and 1.83 °C; GI 1.89 °C and 1.94 °C) for black and yellow dogs respectively during the sunlight phase (P > 0.05). All temperatures and respiration rates decreased similarly across coat colors for rectal (0.9°C and 1.0 °C) GI (1.5 °C and 1.3°C) for black and yellow dogs respectively (P>0.05). Similarly, sex did not impact thermal status across rectal, gastrointestinal, surface temperature or respiration rates measured (P > 0.05). These data contradict the commonly held theory that dogs with darker coat color may experience a greater thermal change when compared to dogs with a lighter coat color exposed to direct sunlight.

OBJECTIVES: To determine and compare color difference CIEDE2000 (ΔE00) of pressed IPS E.max lithium disilicate ceramic material after repeated firing cycles. To determine and evaluate correlation of CIELAB and CIEDE2000 values analyzed by X-Rite Color i5 Spectrophotometer, VITA EasyShade® Advance 4.0 (VITA Zahnfabrik) and Adobe Photoshop CC. MATERIALS AND METHODS: 36 specimens 8mmX10mm at 1.5mm thickness (12 specimens of pressed IPS e.max® Press Lithium Disilicate MT Monochromatic ingots and 24 specimens pressed IPS e.max® Multi Press Lithium Disilicate Multichromatic ingots. Specimens were exposed to repeated firing cycles up to 7 cycles. Color analysis was performed after 1st,2nd,3rd,5th, and7th firing cycle. CIE L*a*b* values measured by X-Rite Color i5 Spectrophotometer, VITA EasyShade® Advance 4.0 (VITA Zahnfabrik) and Adobe Photoshop CC. CIELAB (Δ*ab) and CIEDE2000 (Δ00) calculated to measure color difference. RESULTS: Linear regression and multiple comparison analysis (Tukey’s HSD test) showed a significant color difference (Δ*ab) and CIEDE2000 (Δ00) with (p-value <0.001), after multiple firing cycles, between instruments used and in different shades groups. Moreover, significant different in interactive effect between different shades tested by different instrument, different shades tested after multiple firing cycles and different instruments after multiple firing cycles. CONCLUSION: IPS E.max lithium disilicate material shows significant color difference after repeated firing cycle tested by three color analysis instruments. Measuring instruments used to evaluate CIE L*a*b* color values showed significant different in color values analysis which may lead to altered level of interpretation, particularly to determine perceptibility and clinical acceptability thresholds. / 2021-08-15T00:00:00Z

O objetivo deste trabalho foi avaliar diferentes materiais de cobertura (sistemas adesivos e selantes de superfície) quanto à alteração de cor e rugosidade quando aplicados sobre a superfície da resina composta. Noventa corpos de prova foram confeccionados em resina composta Z350 XT, A2E (3M Oral Care) com o auxílio de molde em Teflon (5x5x3mm). Após sua confecção, os corpos de prova foram imersos e mantidos em água deionizada durante 24h em estufa a 370C. Em seguida, os corpos de prova foram polidos, lavados em cuba ultrassônica e então distribuídos aleatoriamente nos grupos experimentais (n=10): 1) CTRL - somente polimento ; 2) SB - Adper SingleBond II (3M Oral Care); 3) US - Single Bond Universal (3M Oral Care); 4) CF - Clearfil SE (Kuraray); 5) APS - Ambar APS (FGM); 6) BF - Bioforty (Biodinâmica); 7) FF - Fortify (Bisco); 8) PS - PermaSeal (Ultradent); 9) GC - G CoatPlus (GC). Os corpos de prova foram avaliados quanto à alteração de cor em um Espectrofotômetro e quanto à rugosidade em um Perfilômetro óptico. Após as leituras iniciais, os corpos de prova foram imersos em vinho tinto e as medidas de ?E (alterac?a?o de cor) e Ra (rugosidade) foram analisadas nos tempos 24h, 72h e 168h. Os dados foram submetidos à análise de variância (ANOVA), testes de Tukey e teste de correlação de Pearson (p< 0,05). Não houve estabilidade de cor em nenhum dos grupos experimentais, inclusive no controle. Os selantes de superfície: BF, FF e PS e o sistema adesivo SB apresentaram a menor alteração em 24h e semelhante ao CTRL. O sistema adesivo APS apresentou a maior alteração de ?E em todos os tempos testados e diferença estatística em relação aos demais grupos (p<0,05). Em até 72h a alteração de cor ocorreu em maior intensidade, com tendência estabilizar-se em 168h para todos os grupos experimentais. Na aplicação imediata, os selantes de superfície e o sistema adesivo APS apresentaram a maior lisura superficial. Após 168h, o selante de superfície GC apresentou o menor valor de rugosidade e todos os demais materiais apresentaram-se semelhantes ao CTRL. Não houve correlação entre alteração de cor e rugosidade. / The purpose of this work was to evaluate different surface treatments (adhesive systems and surface sealants) regarding color change and roughness when applied on the surface of the composite resin. Ninety test specimens were made of composite resin Z350 XT, A2E (3M Oral Care) with the aid of Teflon mold (5x5x3mm). After the preparation of the specimens, they were immersed and kept in deionized water for 24 hours in an oven at 37°C. Then, the specimens were polished, washed in ultrasonic bath and then distributed randomly in the experimental groups, (n=10): 1) CTRL - only the polishing procedure; 2) SB - Adper SingleBond II (3M Oral Care); 3) US - Single Bond Universal (3M Oral Care); 4) CF - Clearfil SE the \"Bond\" bottle (Kuraray); 5) APS-Amber APS (FGM); 6) BF - Bioforty (Biodynamic); 7) FF - Fortify (Bisco); 8) PS - PermaSeal (Ultradent); 9) GC - G CoatPlus (GC). The specimens were analyzed regarding color alterations with a spectrophotometer and roughness changes with an optical profilometer. After the initial readings, the specimens were immersed in red wine and the measurements of ?E (color change) and Ra (roughness) were analyzed after 24h, 72h and 168h. Data were submitted to analysis of variance (ANOVA), Tukey\'s tests and Pearson correlation tests (p<0.05). Color stability was not observed in any of the analyses groups, including the control group. The surface sealants BF, FF and PS and the adhesive system SB presented the smallest alterations in 24h and similar to the CTRL. The adhesive system APS presented the highest ?E alterations in all times tested and it was statistically different from other groups (p<0.05). Within 72h the color change occurs at higher intensity, with a tendency to stabilize in 168h for all experimental groups. In the immediate application, the surface sealants and the adhesive system APS showed the highest superficial smoothness. After 168h, the surface sealant GC presented the lowest roughness value and all the other materials behaved similarly to the CTRL. There was no correlation between color and roughness changes.

Thesis advisor: Janet E. Helms / Black women are often confronted with social-systemic barriers and differential treatment based on the shade of their skin color. Colorism, a derivative of racism, is the use of skin-color shade as the basis for interactions with and evaluations of Black women. Some theoretical and empirical literature suggests that Black women may encounter and respond to colorism in various social contexts. Nevertheless, without an adequate measure to assess these contextually based experiences, it is difficult to explore the complex dynamics of the colorism that Black women face. In the present study, socioecological theory (Brenner, Zimmerman, Bauermeister, & Caldwell, 2013) was adapted to frame a contextual model of colorism in order to develop a measure that assesses Black women’s perceptions of and responses to colorism across social contexts, including in their families, within and outside of their racial community, and in society. Black women (N = 299) responded to 98 contextual items derived from personal accounts of colorism, focus groups, and theoretical literature. Various scale development techniques including item analysis, exploratory factor analyses, and parallel analyses yielded four dimensions of perceived colorism experiences (i.e., racial out-group, family, racial in-group, society) and seven dimensions of perceived colorism responses (i.e., racial out-group/society, family and racial in-group cognitive-emotional reactions, family and non-family positive colorism, negative self-concept, attractiveness). To investigate validity evidence, multivariate multiple regression analyses (MMRAs) and hierarchical multiple regression analyses were conducted to examine relationships between the factor-derived subscales of the Perceived Colorism Scale and internalized colorism, racial identity, and self-esteem. Overall, results of the analyses supported the importance of four contexts for colorism experiences (racial out-group, family, racial in-group, and society). However, context-related responses to colorism were more complex than initially hypothesized. The factor-derived PCS subscales were predictive of internalized colorism, racial identity and self-esteem. Nonetheless, the subscales varied in the extent to which they were related to the validity measures and some of the significant relationships were not in hypothesized directions. Methodological limitations, along with implications for future theory, research, and practice are discussed. / Thesis (PhD) — Boston College, 2017. / Submitted to: Boston College. Lynch School of Education. / Discipline: Counseling, Developmental and Educational Psychology.

Objetivo: avaliar cor, brilho, rugosidade e alterações ultraestruturais do esmalte dental clareado com peróxido de hidrogênio a 35 %, submetido ao tratamento prévio com agente desproteinizante, ou ao tratamento posterior com o agente remineralizador fosforopeptídeo de caseína/fosfato de cálcio amorfo (ACP-CPP). Material e Métodos: Os grupos experimentais foram: GC (controle/consultório): H2O2 a 35 % - 4 sessões de 8 min; GE1 (primer+consultório): NaOCl 5,25 % por 1 min, aplicação do H2O2 a 35 % como no GC; e GE2 (consultório+ACP): GC + ACP-CPP diariamente por 7 dias. Fragmentos contendo esmalte e dentina (n=8), obtidos de dentes bovinos, foram utilizados para avaliar cor, brilho e a rugosidade. Alteração de cor (E), parâmetros L* e b* foram determinados com colorímetro e o brilho superficial com glossímetro antes, imediatamente após (1h), 4 e 7 dias após o tratamento. Parâmetros de rugosidades, Ra, Rt e RSm, foram obtidos com perfilômetro de contato antes, imediatamente após o tratamento e 7 dias após os tratamentos. Os resultados de E, brilho superficial e rugosidade foram avaliados separadamente usando ANOVA 2 fatores e teste de Tukey (p=0,05). Para avaliar a alteração ultraestrutural, dentes pré-molares humanos, seccionados nos sentidos vestibulo-lingual e mesio distal foram observados em microscópio eletrônico de varredura, por emissão de campo, e realizada a quantificação de elementos químicos por EDS. Análise tridimensional da estrutura do esmalte foi realizada por microtomografia computadorizada (micro-CT) com resolução 11,24 m (n=8). Foram realizadas análises dos parâmetros estruturais: espessura estrutural (St.Th.), separação estrutural (St.Sp.) e índice de fragmentação (Fr.I.) antes e após os tratamentos em duas regiões: ROI 1= 56,2 m e ROI 2= 110,2 m, ambas a partir da superfície vestibular. Foi utilizado o teste t pareado para análise estatística de cada parâmetro estrutural. Resultados: Não houve diferença estatística entre os diferentes tratamentos de superfície para E, Ra e RSm. Imediatamente após o clareamento (1h) ocorreu maior aumento do L* e queda do brilho superficial que se manteve por 7 dias. O uso de agente desproteinizante em dentes bovinos não acentuou a redução do brilho do esmalte, mas a aplicação de ACP-CPP acarretou em maior perda brilho e aumento nos valores de rugosidade após 7 dias para Rt. A aplicação do agente desproteinizante previamente ao clareamento em dente humano revelou uma superfície mais lisa, sem alterar os parâmetros estruturais. Há uma maior quantidade de cálcio, formação de um manto de recobrimento após aplicação de ACP-CPP em torno dos prismas de esmalte, aumento de St.Th de 4,1m, menor espaçamento entre os cristais de hidroxiapatita e redução de St.Sp em 0,8 m e de Fr.I em 0,01 no ROI-1 após 7 dias. Conclusão: O uso de agente desproteinizante não altera a cor, brilho e a ultraestrutura inorgânica. A aplicação de ACP-CPP após a técnica de clareamento de consultório não contribui para alteração de cor, mas reduz o brilho e altera a ultraestrutura da porção mais externa do esmalte após 7 dias / Purpose: To evaluate color, gloss, roughness and ultrastructural changes of enamel bleached with 35% hydrogen peroxide, subjected to previous treatment with deproteinized agent, or later treatment with remineralizing agent casein phosphopeptide-amorphous calcium phosphate (CPP-ACP). Materials and Methods: The experimental groups were: GC (control + in-office): 35% H2O2 - 4 sessions of 8 min; GE1(primer+in-office): 5.25% NaOCl during 1 min before the application of 35% H2O2 as done in GC, and GE2 (in-office+ACP-CPP): GC + ACP-CPP, daily applied during 7 days. Enamel and dentin blocks (n=8), obtained from bovine tooth, were used to evaluate color, gloss and roughness. Color changes (E), L* and b* parameters were done with a colorimeter and surface gloss with a glossimeter, before, immediately after (1h), 4 and 7 days after treatment. Roughness parameters, Ra, RT and Rsm, were done with a contact perfilometer before, immediately after and 7 days after treatments. ANOVA two-way and Tukeys test were performed to evaluate E, gloss and roughness separately (p=0.05). To access human pre-molar ultrastructural changes, teeth were cross-sectioned buccal-lingual and disto-mesio observed by scanning electron microscope, field emission gun, EDS to quantify chemical elements. Enamel three-dimensional images were analysed with microcomputed tomography (micro-CT) with resolution 11,24m (n=8). Structural parameters were analyzed: structural thickness (St.Th.), structural separation (St.Sp.) and fragmentation index (Fr.I.) before and after treatments in two regions of interest:ROI 1= 56,2m and ROI 2= 110,2 m, both from buccal surface. Paired t-test was done for analyses of each structural parameter. Results: There was no statistical difference among surface treatments to E, Ra and Rsm. Immediately after bleaching (1h) occured highest L* increase and decrease of surface gloss which remained until 7 days. Deproteinized agent applied on bovine tooth not emphasized enamel gloss reduction, but the CPP-ACP has resulted in a higher gloss reduction and roughness increase (Rt parameter) after 7 days. Deproteinized agent application previous to in- office bleaching observed a smooth surface, without structural parameters changes. There is a greater calcium quantity, forming a cover mantle after CPP-ACP application around enamel prisms, St.Th increase of 4,1m, less spacing between hydroxyapatite crystals and reductions of St.Sp of 0,8 m and Fr.I of 0,01 on ROI-1 after 7 days. Conclusion: Application of deproteinized agent does not change bovine enamel color, gloss and human enamel inorganic ultrastructure. CPP-ACP application after in-office bleaching does not contribute to color change, but decrease gloss of bovine enamel and change human enamel outermost ultrastructure portion after 7 days.

A dissertação aborda o espaço restaurante como elemento de estudo. A contextualização aborda a história e a evolução do ambiente até os dias de hoje, os prérequisitos do projeto e as considerações psicológicas da influência nos clientes e usuários. Todos os capítulos discorrem sobre os elementos principais que compõe um restaurante, acompanhados por imagens com referências do mercado, de acordo com o tema. Em sequência, são descritos e estudados todos os componentes em três estudos de caso. / The dissertation addresses the restaurant space as an element of study. The context of the study considered the history and evolution of the \"restaurant environment\" to the present, the project\'s prerequisites, and the psychological considerations of influence on customers and users. All the chapters discuss the main elements that arrange/compose a restaurant, accompanied by images with references of the market, according to the theme. In sequence, all components are described and studied in three different cases of restaurants in São Paulo.

O uso de compósitos simulando a cor dos tecidos gengivais apresenta-se como uma opção de tratamento restaurador estético com aplicação direta, que pode aumentar a satisfação do paciente por meio de uma solução de baixo custo e pouco invasiva. Este estudo teve como fatores de variação: sistemas restauradores que reproduzem a cor dos tecidos gengivais (Amaris® gingiva (A), NTpremium® Pink (B), Beautifil® II Pink (C) e protocolo de envelhecimento [desafio erosivo (DE) e ciclagem térmica (CT)], avaliados quanto a estabilidade de cor, rugosidade superficial, perda de superfície e quantificação de biofilme. Para os 3 primeiros ensaios, os espécimes foram divididos em 6 grupos (n=10): G1 (A+CT); G2 (A+DE); G3 (B+CT); G4 (B+DE); G5 (C+CT); G6 (C+DE). A ciclagem térmica foi realizada com um total 5.000 ciclos, com banhos de 5ºC e 55ºC e o desafio erosivo consistiu da armazenagem dos espécimes em solução de ácido cítrico 0,3%, com pH 2,5 a 37°C, durante uma semana. Sessenta espécimes de 5mmX5mmX3mm foram montados, fotopolimerizados, polidos e armazenados em estufa a 37º por 24h. Todos os espécimes foram lidos antes e após os protocolos de envelhecimento, utilizando o perfilômetro óptico para avaliação da rugosidade superficial e a perda de superfície, enquanto o espectrofotômetro avaliou a estabilidade de cor dos compósitos, de acordo com os parâmetros do CIELab. Para a quantificação do biofilme foram acrescentadas duas variáveis tempo de leitura (após 3 e 24 horas) e ao protocolo de envelhecimento foi adicionado um grupo controle (sem envelhecimento). Noventa (n=5) espécimes de 4mmX1mm foram montados e padronizados como os espécimes montados para as leitura de rugosidade, perda de superfície e alteração de cor. Para a formação do biofilme foram utilizadas as cepas de Streptococcus mutans UA159, cultivadas em TSB suplementado com 0,5% de sacarose por 3 e 24 horas e mensurados através do método indireto de coloração com safranina e leitura de absorbância para a quantificação do biofilme formado. No que se refere a alteração de cor, detectou-se diferença estatisticamente significante para os fatores sistema restaurador (p=0,00) e para a interação sistema restaurador X protocolo de envelhecimento (p=0,00). A maior variação de cor foi observada no material C quando submetido ao desafio erosivo (16,75±3,25). A ANOVA não detectou diferença estatisticamente significante para nenhum dos fatores em relação a perda de superfície. Na avaliação da rugosidade, detectou-se diferença estatisticamente significante para o fator protocolo de envelhecimento (p=0,00), havendo maior rugosidade para os espécimes submetidos à ciclagem térmica. Na quantificação de biofilme, após 3 e 24 horas, ANOVA detectou diferença estatisticamente significante para o fator protocolo de envelhecimento (p=0,00) e para a interação entre o protocolo de envelhecimento e material restaurador (p=0,00 e p=0,003, respectivamente). Conclui-se que todos os sistemas restauradores apresentaram alteração de cor após os protocolos de envelhecimento testados. A CT foi o protocolo de envelhecimento que mais aumentou a rugosidade em todos os sistemas restauradores, contudo sem perda significante de superfície. A quantificação de biofilme após 3 e 24 horas foi aumentada pelos protocolos de envelhecimento. O desafio erosivo aumentou a deposição de biofilme no sistema restaurador giomer, em 3 e 24 horas. / The use of composites simulating the color of the gingival tissues presents as an option of aesthetic restorative treatment with direct application, which can increase patient satisfaction through a low-cost and non-invasive solution. This study had as factors of variation: restorative systems that reproduce the color of the gingival tissues (Amaris® gingiva (A), NTpremium® Pink (B), Beautifil® II Pink (C) and aging protocols [thermal cycling (TC) and erosive challenge (EC)], evaluated for color stability, surface roughness, surface loss and biofilm quantification. For the first 3 trials, the specimens were divided into 6 groups (n = 10): G1 (A + TC); G2 (A + EC); G3 (B + TC); G4 (B + EC); G5 (C + TC); G6 (C + EC). The thermal cycling was performed with a total of 5.000 cycles, with baths of 5 ° and 55 ° C and the erosive challenge consisted of the storage of the specimens in 0.3% citric acid solution, pH 2.5 at 37°C, for one week. Sixty specimens of 5mmX5mmX3mm were mounted, photopolymerized, polished and stored in destilled water at 37º for 24h. All the specimens were read before and after the aging protocols, using the optical profilometer to evaluate surface roughness and surface loss, while the spectrophotometer evaluated the color stability of the composites, according to CIELab parameters. Two reading time variables (after 3 and 24 hours) were added to the biofilm quantification and a control group (without aging) was added to the aging protocol. Ninety (n=5) specimens of 5mmX1mm were mounted and standardized as the specimens or the first 3 trials, roughness, surface loss and color stability. For the biofilm formation, Streptococcus mutans UA159, cultivated in TSB supplemented with 0.5% of sucrose for 3 and 24 hours and measured by the indirect method of safranin staining and absorbance reading were used. Regarding the color change, a statistically significant difference was detected for the factors restorative system (p=0.00) and for the interaction restorative system X aging protocol (p=0.00). The highest color variation was observed in material C when submitted to erosive challenge (16.75 ± 3.25). ANOVA did not detect a statistically significant difference for any factors in relation to surface loss. In the evaluation of roughness, a statistically significant difference was detected for the aging protocol factor (p=0.00), with a higher roughness for the specimens submitted to thermal cycling. In the biofilm quantification, after 3 and 24 hours, ANOVA detected a statistically significant difference for the aging protocol factor (p=0.00) and for the interaction between the two factors, aging protocols and restorative systems (p=0.00 and p=0.003, respectively). It was concluded that all restorative systems presented color changes after the aging protocols tested. CT was the aging protocol that increased the most roughness in all restorative systems, nevertheless without significant loss of surface. Biofilm deposition after 3 and 24 hours varies considerably depending on the restorative system and aging protocol. The erosive challenge increased biofilm deposition in the restorative system giomer in 3 and 24 hours.