ABSTRACT Minimally invasive urologic surgery has been developing in Brazil and now is a routine part of care in many regions and patients with different conditions benefit from it. Training in laparoscopic and robotic surgery has evolved and concerns exist both over the quality of surgical training and the practical effect on results of the urological training. This is an unprecedented study which undertook a census to determinate the current state of laparoscopic and robotic urological practice and to know the mains barriers to adequate practice in Brazil. In august 2017, surveys, consisting of an anonymous questionnaire with 15 questions, were sent via internet to the mailing list of the Brazilian Society of Urology (SBU). With these data, activities related to laparoscopy and robotic surgery of our urologists and the mains difficulties and barriers to practice laparoscopy and robotic surgery were evaluated. In our survey, 413 questionnaires were completed. Majority of the responders were currently working in the southeast region of Brazil (52.1%) and 75.5% of the surgeons performed laparoscopic surgery while, only 12.8%, robotic surgery. The lack of experience on the technique and the lack of equipment were the mains barriers and difficulties for not executing laparoscopic and robotic surgeries, respectively. Proper longitudinal training and access to good equipment in minimally invasive surgery are still barriers for urologists in our country.

Abstract The aim of this study was to evaluate the degree of conversion (DC) and the thermal stability of bulk-fill and conventional composite resins. Eleven composite resin samples were prepared to evaluate the DC, Vickers microhardness (VMH), mass and residue/particle loss, glass transition temperature (Tg), enthalpy, and linear coefficient of thermal expansion (CTE) using infrared spectroscopy (FTIR), microdurometer analyses, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and dilatometry (DIL). The data were subjected to statistical analysis, with a significance level of 95%. DC and VMH were not influenced by the polymerized side of the sample, and statistical differences were recorded only among the materials. Decomposition temperature, melting, and mass and residue loss were dependent on the material and on the evaluation condition (polymerized and non-polymerized). Tg values were similar between the composites, without statistically significant difference, and CTE ranged from 10.5 to 37.1 (10-6/°C), with no statistical difference between the materials. There was a moderate negative correlation between CTE and the % of load particles, by weight. Most resins had a DC above that which is reported in the literature. TGA, Tg, and CTE analyses showed the thermal behavior of the evaluated composites, providing data for future research, assisting with the choice of material for direct or semidirect restorations, and helping choose the appropriate temperature for increasing the DC of such materials.

OBJETIVO: Avaliar e apresentar resultados preliminares de um novo marcador (hemossiderina) para a identificação de linfonodos sentinela mamários em um modelo experimental. MÉTODOS: Durante acompanhamento de dois casos de biópsias excisionais de tumores da mama, no nosso serviço de mastologia, observou-se trajeto pigmentado no quadrante inferior externo daquelas mamas, sugerindo ser marcação cutânea do ducto de drenagem linfática a partir da papila mamária em direção a axila homolateral. Levantamos a hipótese que um derivado sanguíneo (hemossiderina) foi capturado por macrófagos obtendo acesso aos ductos linfáticos em direção à axila. Seis cadelas sem raça definida foram estudadas. Injeção de 0,2 ml de tecnécio foi realizada em ambas as mamas superiores. Após 10 minutos, uma solução de 2,5 ml de sangue hemolizado (hemossiderina) do próprio animal foi injetado no plexo linfático subpapilar da mama esquerda e 2,5 ml de azul patente na mama contralateral concomitantemente e igualmente. Após mais 10 minutos, incisões axilares foram realizadas para a procura, pela coloração e com um gama probe, dos linfonodos sentinela. RESULTADOS: Sete linfonodos sentinela castanhos e radiomarcados foram identificados na axila esquerda. Seis linfonodos sentinela azuis e radiomarcados foram identificados na axila direita. CONCLUSÃO: São apresentados estudos preliminares de um potencial novo marcador para identificação do linfonodo sentinela. Este poderá mudar o uso dos corantes vitais e de seus efeitos adversos em pacientes submetidos à biópsia do linfonodo sentinela.

PURPOSE: To evaluate and present our initial results of a new marker (hemosiderin) for mammary sentinel lymph node identification in an experimental model. METHODS: Skins mapped like a lymphatic duct draining to the axilla in patients submitted to breast biopsy, in our mastology service, stimulated us to try it in an animal model (female dogs). Our theory was that some blood derivate (hemosiderin) was captured by macrophages and accessed the lymphatic ducts in direction to the axilla. Six female dogs of no defined race were studied. We injected 0,2 ml of technetium on both superior mammary glands. After ten minutes, a 2,5 ml solution of hemolized blood (hemosiderin) from the own animal was injected in the subareolar lymphatic plexus on the left superior mammary gland and 2,5 ml of patent blue concomitantly and equally on the contralateral gland. Ten minutes after, incisions on both axilas were made to search, through the lymphatic mapping and a gamma probe, the sentinel lymph nodes. RESULTS: Seven brown sentinel lymph nodes were indentified and also radiomarked on the left axilla. Six blue sentinel lymph nodes were identified and also radiomarked on the right axilla. CONCLUSION: Preliminary studies of a potential new dye for sentinel lymph node identification are presented. It may be the change of the current use of the blue dyes and their severe side-effects on patients submitted to sentinel lymph node biopsies.