OBJECTIVE: This study aims at comparing the perception of orthodontists, maxillofacial surgeons, visual artists and laypersons when evaluating the influence of sagittal position of the mandible - in lateral view - in facial attractiveness; at a job hiring; and in the perception of socioeconomic profile. METHODS: A black male, a white male, a black female and a white female with harmonic faces served as models to obtain a facial profile photograph. Each photograph was digitally manipulated to obtain seven facial profiles: an ideal, three simulating mandibular advancement and three simulating mandibular retrusion, producing 28 photographs. These photographs were evaluated through a questionnaire by orthodontists, maxillofacial surgeons, visual artists and laypersons.RESULTS: The anteroposterior positioning of the mandible exerted strong influence on the level of facial attractiveness, but few significant differences between the different groups of evaluators were observed (p < 0.05).CONCLUSIONS: The profiles pointed as the most attractive were also pointed as more favorable to be hired to a job position and pointed also as having the best socioeconomic condition.

The objective of the present study was to evaluate the effect of different surface treatments and polymerization protocols on the bond strength of brackets to enamel, and the degree of conversion of the bonding agents. 120 bovine crowns were embedded in acrylic resin blocks and sanded. Next, the blocks were randomly assigned into 12 groups. Metal brackets were bonded to enamel according to the "surface treatment" factor (A: Phosphoric Acid; ATxt: Phosphoric Acid + Transbond XT Primer®; Tse: Transbond Plus Self Etching Primer®; and SBU: Scotchbond Universal®) and "polymerization" factor (R20: Radii-Cal®/20 seconds; V20: Valo Cordless®/20 seconds; and V3: Valo Cordless®/3 seconds). All samples were stored for 6 months (water, 37ºC) and then subjected to a shear bond strength test (SBS). Bond failures were classified according to the Adhesive Remnant Index (ARI) and analyzed with the Kruskal-Wallis and Mann-Whitney tests (5%). Using the same factors, 120 resin discs were made to assess the degree of conversion (DC) of the monomer. Data from the SBS (MPa) and DC (%) were analyzed by analysis of variance (2 factors) and Tukey's test (5%). For the SBS, the factors "polymerization" (R20 = 8.1B; V20 = 13.2A; V3 = 5.2C, p = 0.0001) and "surface treatment" (A = 3.1C; ATxt = 13.6A; Tse = 12.3A; SBU = 6.3B, p = 0.0001) were statistically significant among groups. The highest adhesion value were found for the ATxt/V20 group (22.2A) and the lowest value for the A/R20 group (1.2E). Regarding ARI, score 2 was the most prevalent in groups A, ATxt, V20 and V3, while score 4 was the most prevalent in the Tse, SBU and R20 groups, with no significant difference between them (p = 1.0). Regarding DC, the factors "polymerization" (R20 = 66.6A; V20 = 58.4B; V3 = 45.1C, p = 0.0001) and "surface treatment" (A = 52B, ATxt = 59.7A, Tse = 51.4B, SBU = 63.8A, p = 0.0001) were statistically significant. Tse was more sensitive to the variations in polymerization protocols than the other surface treatments. Treatment A did not present suitable bond strength or degree of conversion.

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Resumo: A anatomia humana é uma disciplina fundamental na formação de profissionais da saúde e socorristas. O conhecimento das estruturas corporais facilita a capacidade de compreensão, desenvolvimento e aplicações de técnicas de resgate, aprimorando assim o atendimento oferecido à população. Tendo em vista a importância dos socorristas no resgate às vítimas de diversos tipos de trauma, justifica-se a colaboração entre universidade e profissionais que trabalham nesta função para o ensino de anatomia humana. O projeto foi desenvolvido junto aos integrantes do 10º Batalhão do Corpo de Bombeiros Militar de Minas Gerais que participaram de um projeto de extensão da Universidade Federal de São João del-Rei. Os acadêmicos prepararam o material didático (apostilas, aulas teóricas e roteiros de aula prática). Os sistemas estudados foram respectivamente, nervoso, circulatório, respiratório e osteomuscular. As aulas teóricas foram ministradas nas dependências do Corpo de Bombeiros e as práticas desenvolvidas no Laboratório de Anatomia Humana da UFSJ. Com o propósito de avaliar o conhecimento prévio e aprendizado dos bombeiros, antes e após as aulas teóricas, foi aplicado um teste, formulado pelos extensionistas, contendo dez questões fechadas cuja pontuação foi posteriormente analisada pelo Teste t de Student pareado. Houve diferença estatística na porcentagem de acerto nas provas antes e após as aulas (P <0,05). O projeto de extensão mostrou-se capaz de instruir os socorristas quanto à estrutura dos sistemas humanos estudados, auxiliando dessa forma no entendimento das técnicas de salvamento, o que pode refletir diretamente na melhoria dos serviços oferecidos à população.

a b s t r a c tBackground: Orthodontists evaluate the cephalometric analysis in order to determine a correct diagnosis. In clinical practice, oral radiologists are the group of specialists who run this test. However, due to several factors, some orthodontists feel the need to confirm the results reported by oral radiology clinics and perform the cephalometric analysis again. The main objective of this study was to assess the consistency among cephalometric measurements obtained by orthodontists and radiologists using computerized cephalometric analysis software. Methods: Thirty orthodontists and 30 oral radiologists identified 18 cephalometric landmarks using the same computer, as directed by the software Radiocef Studio 2 Ò . From there, 14 cephalometric parameters were generated. In order to verify the intraexaminer agreement, 10 professionals from each group repeated the identification of the landmarks with a minimum interval of 8 days between the two markings. The intragroup variability was calculated based on the coefficients of variation. The comparison between groups was performed by using the Student t-test and the ManneWhitney test. Results: In the group of orthodontists, the measurements of Pog and 1-NB, SL, line S-Ls, Line S-Li, and 1.NB showed high internal variability. In the group of radiologists, the same occurred with the values of Pog and 1-NB, line S-Ls, Line S-Li, and 1.NA. In the comparison between groups, all the analyzed linear measurements (Pog and 1-NB, SL, Line S-Ls, and Line S-Li) and two angular measurements (1.SN and AF) showed statistically significant differences between radiologists and orthodontists (P < 0.05). Conclusion: All linear measures assessed (and only two angular measures) indicated an inconsistency between orthodontists and radiologists.