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The purpose of this study was to determine if dental aesthetics is perceived by adults to affect an individual’s ability to emerge as a leader. An electronic survey was constructed using facial frontal smiling photographs of 10 patients. Statements were formulated to evaluate four leadership characteristics: intelligence, self-confidence, friendliness, and trustworthiness. Evaluators indicated their level of agreement with each statement for each subject using a 100mm Visual Analog Scale (VAS). Data was obtained from 214 evaluators. Picture ratings were analyzed using repeated-measures mixed-model analyses. Evaluator factors and picture factors were considered when testing for crooked vs. straight teeth differences. There was a significant difference in perception of individuals with straight versus crooked teeth for the characteristics of intelligence, trustworthiness, and self-confidence. No difference found for the characteristic of friendliness. The gender and race of the evaluators influenced the rating of the subjects. Results from this study may support the importance of good smile aesthetics for adults who seek a leadership role.

O objetivo deste estudo foi o de avaliar a estabilidade de cor de diferentes cores de cimento (transparente, claro, e escuro) polimerizados de forma foto (Choice 2 Bisco, Rely X Veneer - 3M ESPE) ou dual (Variolink II Ivoclar-Vivadent, All Cem FGM). Um espectrofotômetro (Easyshade - VITA) foi usado para medir a cor das amostras (n=6) imediatamente após a confecção do espécime, 7 dias, 30 dias e 90 dias após. Os valores médios de diferença de cor (ΔE) foram maiores para as cores transparente (ΔE = 4,41), seguido pelas cores claras (ΔE = 3,12) e escuras (ΔE = 3,25). Os valores médios de ΔE foram menores para os cimentos fotoativados (Choice 2 ΔE = 2,79; Rely X VeneerΔE = 3,49) em comparação com os cimentos duais (Variolink II ΔE = 3,60; All Cem ΔE = 4,48). Um aumento dos valores ΔE foram observados com o aumento dos períodos de tempo avaliados (7 dias ΔE = 2,79; 30 dias ΔE = 3,73; 90 dias ΔE = 4,25). / The aim of this study was to evaluate the color stability of different cement color (transparent, clear, and dark) of light-polymerized resin cement (Choice 2 - Bisco, Rely X Veneer - 3M ESPE) or dual-cured cement (Variolink II Ivoclar- Vivadent , All Cem - FGM). Spectrophotometer (Easyshade - VITA) was used to measure the color of samples (n = 6) immediately after preparation, 7 days, 30 days and 90 days. The mean color difference (ΔE) was higher for transparent colors (ΔE = 4,41), followed by light (ΔE = 3,12) and dark colors (ΔE = 3,25). The mean values of ΔE were lower for the light-polymerized resin cement (Choice 2 ΔE = 2,79; Rely X Veneer ΔE = 3,49) compared to the dual-cured cement (Variolink II ΔE = 3,60; All Cem ΔE = 4,48). An increase in ΔE values was observed with increasing periods of time (7 days ΔE = 2,79; 30 days ΔE = 3,73; 90 days ΔE = 4,25).

During the last three decades there has been an increased influx of refugees and immigrants into Scandinavia. The overall aim of this thesis was primarily to improve our knowledge of malocclusion and orthodontic treatment need, both normative and self-perceived, in adolescents of varying geographic origin. A further aim was to determine whether any differences with respect to perception of general appearance and psychosocial well-being were related to geographic origin. Papers I and II concerned self perceived and normative orthodontic treatment need. About 500 12-13 year-old subjects, stratified into different groups: A-Sweden, B-Eastern/Southeastern Europe, C-Asia and D-other countries, answered a questionnaire and underwent clinical examination by the author. In paper III the association between the two variables in papers I and II was investigated. Paper IV was a follow up study, at 18-19 years of age, of the relationship between geographic origin and prevalence of malocclusion, self-perceived treatment need, temporomandibular symptoms and psychosocial wellbeing. In Paper V a qualitative study of 19-20 year old subjects was conducted, to identify the strategies they had adopted to handle the issue of persisting poor dental aesthetics. The main findings were that at 12-13 years of age, immigrant subjects had a lower perceived orthodontic treatment need than subjects of Swedish background. Girls of Swedish background had the highest self perceived treatment need, whilst girls of non-Swedish background were most concerned that fixed appliance therapy would be painful. In a few of the clinical variables measured at 12-13 years of age, the Swedish group exhibited the greatest space deficiency and irregularity in both the maxillary and mandibular anterior segments and greater overjet, compared to the Eastern/Southeastern European and Asian groups. The clinical implications were negligible. The orthodontic treatment need according to “Index of Orthodontic Treatment Need - Dental HealthComponent” (IOTN-DHC) grades 4 and 5, ranged from 30 to 40 percent, without any inter-group differences. There were strong associations between subjects perceiving a need for orthodontic treatment and 6IOTN-DHC grades 4 and 5, anterior crossbite and avoiding smiling because they were self-conscious about their teeth. At the age of 18-19 years, the frequency of malocclusion was similar in all groups. Subjects of Asian origin had a higher self-perceived orthodontic treatment need than their Swedish counterparts and a higher frequency of headache than those of Eastern/Southeastern European origin. Psychological wellbeing was reduced in nearly one quarter of the sample, more frequently in girls than boys. No association was found between self-perceived orthodontic treatment need and psychological wellbeing. The theory “Being under the pressure of social norms” was generated in Paper V, and it can be applied to improve our understanding of young adults who have adjusted to living with poor dental aesthetics and also aid to identify those who are not as well-adjusted and would probably benefit from treatment. Undisclosed dental fear is an important barrier to acceptance of orthodontic treatment in early adolescence. Despite demographic changes due to immigration, no major change in the prevalence of malocclusion and normative orthodontic treatment need has been disclosed. This does not apply to adolescents and adults who immigrated at an older age.

Resumo: O objetivo deste estudo foi avaliar as alterações dos tecidos periimplantares, ao redor de implantes instalados em diferentes profundidades em relação à crista óssea, e sob protocolos de reabilitação protética convencional e imediato. Cinco cães receberam trinta implantes, três por hemi-mandíbula (seis por cão), na região dos quatro pré-molares inferiores que foram extraídos 90 dias antes. Cada região foi divida pelos subgrupos convencional (protocolo convencional, instalação da prótese 120 dias após os implantes) e imediato (protocolo imediato, instalação da prótese 1 dia após a cirúrgia de implantes). Os implantes foram inseridos em três profundidades diferentes: ao nível (ao nível do rebordo ósseo), -1 mm (1 mm apicalmente à crista óssea) e -2 mm (2 mm apicalmente à crista óssea). Após acompanhamento por 45 dias da reabilitação instalada foi realizada avaliação clínica e radiográfica e, os dados foram analisados estatisticamente (p< 0.05). A posição do tecido marginal (PTM) não foi alterada pelo protocolo de instalação, e sim pelo nível de inserção da junção implante-conector protético (JIC) em relação a crista óssea (BC). A reabsorção da BC em função do nível de inserção de JIC foi relativamente uniforme para os diferentes grupos. Estes achados sugerem cautela ao posicionar a JIC de implantes apicalmente à BC. / Abstract: The aim of the present study was to evaluate changes in tissues around dental implants inserted in different levels in relation to crestal bone (BC) under early and delayed loading conditions. Thirty implants were inserted in five mongrel dogs were used in this study, from which, the lower premolars were removed, and 90 days after, in one side, three dental implants were inserted (Delayed subgroup, implants installed 120 days before loading) in three different levels in relation to crestal bone (Bone Level, Minus1 and Minus2 groups), and three implants were inserted on remain ridge (Early subgroup, implants were loaded 48 hours after installed). The metallic prostheses were installed in both sides and preserved for 45 days. The clinical and radiographic analyses were performed. Data was submitted to statistics, under a 5% level of significance. The load conditions did not interfered on the position of marginal soft tissues (PTM), those changes evaluated because of the insert level of the implant-abutment junction (JIC) in to BC. The BC resorption was similar in all types of insertion levels of the implants. The present finds suggest caution on insertion of the implant in an apical position level in relation to BC. / Orientador: Elcio Marcantonio / Coorientador: Elcio Marcantonio Junior / Banca: Walter Martins Junior / Banca: Luis Antonio Borelli Barros / Mestre

Made available in DSpace on 2014-06-11T19:28:02Z (GMT). No. of bitstreams: 0 Previous issue date: 2008-03-28Bitstream added on 2014-06-13T20:36:52Z : No. of bitstreams: 1 paula_wn_me_arafo.pdf: 549135 bytes, checksum: 1cd91d5b53b64bec46b8e5ace0efab34 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo deste estudo foi avaliar as alterações dos tecidos periimplantares, ao redor de implantes instalados em diferentes profundidades em relação à crista óssea, e sob protocolos de reabilitação protética convencional e imediato. Cinco cães receberam trinta implantes, três por hemi-mandíbula (seis por cão), na região dos quatro pré-molares inferiores que foram extraídos 90 dias antes. Cada região foi divida pelos subgrupos convencional (protocolo convencional, instalação da prótese 120 dias após os implantes) e imediato (protocolo imediato, instalação da prótese 1 dia após a cirúrgia de implantes). Os implantes foram inseridos em três profundidades diferentes: ao nível (ao nível do rebordo ósseo), -1 mm (1 mm apicalmente à crista óssea) e -2 mm (2 mm apicalmente à crista óssea). Após acompanhamento por 45 dias da reabilitação instalada foi realizada avaliação clínica e radiográfica e, os dados foram analisados estatisticamente (p< 0.05). A posição do tecido marginal (PTM) não foi alterada pelo protocolo de instalação, e sim pelo nível de inserção da junção implante-conector protético (JIC) em relação a crista óssea (BC). A reabsorção da BC em função do nível de inserção de JIC foi relativamente uniforme para os diferentes grupos. Estes achados sugerem cautela ao posicionar a JIC de implantes apicalmente à BC. / The aim of the present study was to evaluate changes in tissues around dental implants inserted in different levels in relation to crestal bone (BC) under early and delayed loading conditions. Thirty implants were inserted in five mongrel dogs were used in this study, from which, the lower premolars were removed, and 90 days after, in one side, three dental implants were inserted (Delayed subgroup, implants installed 120 days before loading) in three different levels in relation to crestal bone (Bone Level, Minus1 and Minus2 groups), and three implants were inserted on remain ridge (Early subgroup, implants were loaded 48 hours after installed). The metallic prostheses were installed in both sides and preserved for 45 days. The clinical and radiographic analyses were performed. Data was submitted to statistics, under a 5% level of significance. The load conditions did not interfered on the position of marginal soft tissues (PTM), those changes evaluated because of the insert level of the implant-abutment junction (JIC) in to BC. The BC resorption was similar in all types of insertion levels of the implants. The present finds suggest caution on insertion of the implant in an apical position level in relation to BC.

O objetivo deste estudo foi o de avaliar a estabilidade de cor de diferentes cores de cimento (transparente, claro, e escuro) polimerizados de forma foto (Choice 2 Bisco, Rely X Veneer - 3M ESPE) ou dual (Variolink II Ivoclar-Vivadent, All Cem FGM). Um espectrofotômetro (Easyshade - VITA) foi usado para medir a cor das amostras (n=6) imediatamente após a confecção do espécime, 7 dias, 30 dias e 90 dias após. Os valores médios de diferença de cor (&#x394;E) foram maiores para as cores transparente (&#x394;E = 4,41), seguido pelas cores claras (&#x394;E = 3,12) e escuras (&#x394;E = 3,25). Os valores médios de &#x394;E foram menores para os cimentos fotoativados (Choice 2 &#x394;E = 2,79; Rely X Veneer&#x394;E = 3,49) em comparação com os cimentos duais (Variolink II &#x394;E = 3,60; All Cem &#x394;E = 4,48). Um aumento dos valores &#x394;E foram observados com o aumento dos períodos de tempo avaliados (7 dias &#x394;E = 2,79; 30 dias &#x394;E = 3,73; 90 dias &#x394;E = 4,25). / The aim of this study was to evaluate the color stability of different cement color (transparent, clear, and dark) of light-polymerized resin cement (Choice 2 - Bisco, Rely X Veneer - 3M ESPE) or dual-cured cement (Variolink II Ivoclar- Vivadent , All Cem - FGM). Spectrophotometer (Easyshade - VITA) was used to measure the color of samples (n = 6) immediately after preparation, 7 days, 30 days and 90 days. The mean color difference (&#x394;E) was higher for transparent colors (&#x394;E = 4,41), followed by light (&#x394;E = 3,12) and dark colors (&#x394;E = 3,25). The mean values of &#x394;E were lower for the light-polymerized resin cement (Choice 2 &#x394;E = 2,79; Rely X Veneer &#x394;E = 3,49) compared to the dual-cured cement (Variolink II &#x394;E = 3,60; All Cem &#x394;E = 4,48). An increase in &#x394;E values was observed with increasing periods of time (7 days &#x394;E = 2,79; 30 days &#x394;E = 3,73; 90 days &#x394;E = 4,25).

Made available in DSpace on 2014-06-11T19:24:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2009-02-16Bitstream added on 2014-06-13T20:31:07Z : No. of bitstreams: 1 estebanflorez_fl_me_arafo.pdf: 4818126 bytes, checksum: 136867861dfe8fc2d361248949270525 (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / O clareamento dental é uma técnica que surgiu no inicio do século XIX. Desde então, e em função dos resultados obtidos ao longo do tempo, esta foi sendo alterada de maneira a reduzir os riscos do procedimento e ao mesmo tempo melhorar o resultado estético obtido. Com o aparecimento das fontes de luz para uso odontológico, novas e interessantes possibilidades surgiram e permitiram a utilização de métodos de aceleração que respeitem a fisiologia pulpar, que diminuam o tempo de exposição do paciente aos agentes peróxidos e promovam ainda a obtenção de bons resultados estéticos. Nos dias de hoje, pode-se observar na literatura importantes questionamentos acerca da contribuição efetiva da luz visível no processo e, os efeitos dos agentes peróxidos nas estruturas cristalinas dos dentes, materiais restauradores em geral e tecidos moles. Estas preocupações foram o cerne da motivação para a realização desta pesquisa, sendo assim, este trabalho vem propor uma série de metodologias inovadoras que avaliem através de tecnologias modernas os mecanismos básicos de interação da luz visível com o peróxido de hidrogênio e com os pigmentos orgânicos. Os experimentos aqui demonstrados abordam os fatores críticos relacionados com a eficiência do processo em diferentes substratos por meio de análise de transmitância, de fluorescência e imagens digitais. Com estes estudos pretendemos responder de maneira objetiva algumas das questões que foram observadas serem de fundamental importância no esclarecimento da real eficiência e eficácia da luz no clareamento dental. / The dental bleaching is a technique that appeared in the beginning of the XIX century. Since then, and in function of the obtained results a long the time, this has been altered in way to reduce the procedure risks and at the same time improve the aesthetic results. With the rise of light sources to be used in dentistry, new and exciting possibilities appeared and allowed the use of catalytic methods that respect the pulpal physiology, which diminishes the exposure time of the patients to the bleaching agents and provides good aesthetic results. In nowadays, it is possible to observe in the literature important questionings over the real contribution of light in the process and, the effects of the peroxide over the crystalline structure of the teeth, restorative materials and soft tissues. These concerning were the major motivation to the realization of this research, in this way, this work proposes a new series of methods that asses by the use of new technologies the basic mechanisms of visible light interaction with the hydrogen peroxide and with the organic pigments. The experiments here demonstrated study the critical factors related with the process efficiency in different substrates by digital images, transmittance and fluorescence. With these studies we pretend to respond in objective way some questions that were observed to be of fundamental importance in the understanding of the light efficiency and efficacy to the dental bleaching.

Orientador: Osmir Batista de Oliveira Júnior / Banca: Vanderlei Salvador Bagnato / Banca: Carlos EduardoFrancci / Resumo: O clareamento dental é uma técnica que surgiu no inicio do século XIX. Desde então, e em função dos resultados obtidos ao longo do tempo, esta foi sendo alterada de maneira a reduzir os riscos do procedimento e ao mesmo tempo melhorar o resultado estético obtido. Com o aparecimento das fontes de luz para uso odontológico, novas e interessantes possibilidades surgiram e permitiram a utilização de métodos de aceleração que respeitem a fisiologia pulpar, que diminuam o tempo de exposição do paciente aos agentes peróxidos e promovam ainda a obtenção de bons resultados estéticos. Nos dias de hoje, pode-se observar na literatura importantes questionamentos acerca da contribuição efetiva da luz visível no processo e, os efeitos dos agentes peróxidos nas estruturas cristalinas dos dentes, materiais restauradores em geral e tecidos moles. Estas preocupações foram o cerne da motivação para a realização desta pesquisa, sendo assim, este trabalho vem propor uma série de metodologias inovadoras que avaliem através de tecnologias modernas os mecanismos básicos de interação da luz visível com o peróxido de hidrogênio e com os pigmentos orgânicos. Os experimentos aqui demonstrados abordam os fatores críticos relacionados com a eficiência do processo em diferentes substratos por meio de análise de transmitância, de fluorescência e imagens digitais. Com estes estudos pretendemos responder de maneira objetiva algumas das questões que foram observadas serem de fundamental importância no esclarecimento da real eficiência e eficácia da luz no clareamento dental. / Abstract: The dental bleaching is a technique that appeared in the beginning of the XIX century. Since then, and in function of the obtained results a long the time, this has been altered in way to reduce the procedure risks and at the same time improve the aesthetic results. With the rise of light sources to be used in dentistry, new and exciting possibilities appeared and allowed the use of catalytic methods that respect the pulpal physiology, which diminishes the exposure time of the patients to the bleaching agents and provides good aesthetic results. In nowadays, it is possible to observe in the literature important questionings over the real contribution of light in the process and, the effects of the peroxide over the crystalline structure of the teeth, restorative materials and soft tissues. These concerning were the major motivation to the realization of this research, in this way, this work proposes a new series of methods that asses by the use of new technologies the basic mechanisms of visible light interaction with the hydrogen peroxide and with the organic pigments. The experiments here demonstrated study the critical factors related with the process efficiency in different substrates by digital images, transmittance and fluorescence. With these studies we pretend to respond in objective way some questions that were observed to be of fundamental importance in the understanding of the light efficiency and efficacy to the dental bleaching. / Mestre

Made available in DSpace on 2014-07-29T15:21:58Z (GMT). No. of bitstreams: 1 dissertacaonadia.pdf: 556762 bytes, checksum: 6b925b77e88d5393ef916f42ecfc9079 (MD5) Previous issue date: 2007-04-30 / As patient-centered approaches become more popular, increasing attention is given to the effects of various health situations in oral health-related quality of life (OHRQL) and body satisfaction. The aim of this study was to evaluate the association between several aspects related to dental esthetics and body satisfaction, self-evaluation concerning to esthetics, and oral-health related quality of life (OHRQL). This work had a cross-sectional design and its sample comprised subjects aged 13-20 years-old (n = 301; mean age = 16.12; SD = 1.75). The sample was of convenience type, comprising high-school students of a public school from Goiânia. Conditions related to dental esthetics were assessed through a clinical exam following the criteria established by World Health Organization. Self-perception variables were evaluated through the instruments Body Satisfaction Scale (BSS), short-form of Oral Health Impact Profile (OHIP-14) and Psychosocial Impact of Dental Aesthetics Questionnaire (PIDAQ), as well as esthetic self-evaluation and will of change. Chi-square test and multiple logistic regression were used to evaluate the association of variables. There was a low prevalence of dental alterations in the sample assessed. In general, there was a low impact of dental characteristics on OHRQL measures, what may influence on the decision-making process regarding to dental treatment needs. / À medida que as abordagens centradas no paciente se tornam mais difundidas, mais atenção tem sido dada aos efeitos de varias situações de saúde sobre a qualidade de vida relacionada à saúde bucal (QVRSB) e outros aspectos relacionados à auto-percepção dos indivíduos. O objetivo deste estudo foi avaliar a associação entre características relacionadas à estética dentária e a satisfação com o corpo, a auto-avaliação estética e a QVRSB. O estudo teve desenho transversal, incluindo 301 adolescentes de 13 a 20 anos de idade (média= 16,12; DP = 1,75). A amostra do estudo foi de conveniência, compreendendo alunos do ensino médio de uma escola pública de Goiânia. Foram verificadas as condições relacionadas à estética dentária através de exame clínico segundo critérios da Organização Mundial de Saúde. As variáveis relacionadas à auto-percepção foram avaliadas através dos instrumentos Escala de Satisfação Corporal (ESC), versão reduzida do Oral Health Impact Profile (OHIP-14) e o Questionário de Impacto Psicossocial da Estética Dentária (QIPED), além da auto-avaliação estética e desejo de mudança. Para a análise da associação entre as variáveis foi utilizado o teste de Qui-quadrado e regressão logística múltipla. Houve baixa prevalência de alterações dentárias na amostra pesquisada. De modo geral, houve baixa influência das características dentárias sobre medidas para a avaliação da QVRSB, o que pode influenciar na tomada de decisões clínicas relacionadas ao tratamento odontológico.