Comparative clinical evaluation of breast augmentation using silicone foam coated implants and textured implants

Abstract Purpose To evaluate whether silicone foam implants have a different evolution pattern compared to conventional texture implants. Methods Fifty-eight female patients underwent surgery. They were divided into two groups (silicone foam - Lifesil® - and microtexturized silicone - Lifesil®). The evolution was analyzed in postoperative consultations, with physical examination, photographic documentation and filling in a satisfaction questionnaire, in the postoperative period of one month, four months, one year and then annually, up to a maximum of 3 years of follow-up. Results There were no statistically significant differences in presence of rippling, stretch marks, breast ptosis, capsular contracture and quality of scars. There was a higher rate of patients who were very satisfied with the outcome 360 days after surgery in the group receiving silicone foam implants (p = 0.036). Conclusion In short time, silicone foam envelope implants proved to be as reliable as textured silicone envelope implants, making them an option for augmentation mammoplasty.

The use of soft silicone solid implant molded intraoperatively for pectus excavatum surgical repair / Utilização de silicone sólido de baixo índice de dureza moldado no período intraoperatório para a correção de pectus excavatum

Objective To describe a new surgical technique to treat pectus excavatum utilizing low hardness solid silicone block that can be carved during the intraoperative period promoting a better aesthetic result. Methods Between May 1994 and February 2013, 34 male patients presenting pectus excavatum were submitted to surgical repair with the use of low hardness solid silicone block, 10 to 30 Shore A. A block-shaped parallelepiped was used with height and base size coinciding with those of the bone defect. The block was carved intraoperatively according to the shape of the dissected space. The patients were followed for a minimum of 120 days postoperatively. The results and the complications were recorded. Results From the 34 patients operated on, 28 were primary surgeries and 6 were secondary treatment, using other surgical techniques, bone or implant procedures. Postoperative complications included two case of hematomas and eight of seromas. It was necessary to remove the implant in one patient due to pain, and review surgery was performed in another to check prothesis dimensions. Two patients were submitted to fat grafting to improve the chest wall contour. The result was considered satisfactory in 33 patients. Conclusion The procedure proved to be fast and effective. The results of carved silicone block were more effective for allowing a more refined contour as compared to custom made implants. .

Objetivo Descrever a técnica para reparação de pectus excavatum com o uso de bloco de silicone sólido de baixa dureza, que possibilita a adequação de suas dimensões no intraoperatório para melhor resultado estético. Métodos Entre maio de 1994 e fevereiro de 2013, pacientes do gênero masculino, portadores de pectus excavatum, foram submetidos à correção cirúrgica com bloco de silicone sólido de baixa dureza, de 10 a 30 Shore A, pré-fabricado em forma de paralelepípedo, com as dimensões da altura e da base coincidentes com as da falha óssea. Durante o ato cirúrgico, esse bloco foi esculpido até adequar-se ao formato do espaço dissecado. Os pacientes foram acompanhados por um mínimo de 120 dias de pós-operatório. Resultados Trinta e quatro pacientes foram operados. Destes, 28 foram de tratamento primário e 6 secundário a outras técnicas cirúrgicas, ósseas ou de uso de implantes. As complicações foram dois casos de hematoma e oito de seroma. Foi necessária a retirada do implante em um dos casos devido à dor. Em outro caso, foi a realizada revisão cirúrgica das dimensões da prótese. Dois pacientes foram submetidos a enxerto de gordura, para melhorar o contorno da parede torácica. Não ocorreu nenhum caso de infecção. O resultado foi considerado satisfatório em 33 pacientes. Conclusão O procedimento mostrou-se rápido e efetivo. Os resultados dos contornos obtidos foram considerados mais efetivos quando comparados aos obtidos com a utilização de próteses pré-moldadas. .

Effect of finishing and polishing on surface roughness of composite resins after bleaching

AIM : To evaluate the influence of finishing and polishing techniques on the surface roughness of two composite resins (CRs) subjected to bleaching procedure. METHODS : Forty-eight CR specimens were divided into six groups (n=8). For G1 to G3, a microhybrid CR (Opallis; FGM) was used, and G4 to G6, received a nanohybrid CR (Brilliant NewLine; Coltène/Whaledent). All specimens were subjected to bleaching procedure with 35% hydrogen peroxide (two 45-min applications, with a 5-day interval). The surface roughness of all specimens was evaluated before and after the bleaching and/or finishing/polishing (Ra parameter) by a roughness meter. After bleaching, the groups were subjected to finishing and polishing procedures: G2 and G5 - felt discs + diamond pastes; and G3 and G6 - silicon rubber tips. The control groups (G1 and G4) had no finishing or polishing treatment after bleaching. Data were analyzed by ANOVA and Tukey's post-test, and t test for paired samples (a=0.05). RESULTS : bleaching treatment increased Ra values for the nanohybrid CR specimens, but both finishing/polishing techniques were able to reduce these values; for the microhybrid specimens, only finishing/polishing with silicon rubber tips decreased the roughness values. CONCLUSIONS : For both microhybrid and nanohybrid CRs, the silicon rubber tips were effective to reduce the surface roughness after bleaching procedure...

Evolución de las lentes intraoculares y los viscoelásticos / Intraocular lenses and viscoelastic evolution review

Se hace una revisión de la literatura y se relata la evolución de las lentes intraoculares, de sus materiales y diseños, así como de los viscoelásticos.

Traumatismos de la mama / Breast trauma

Se presentaron 45 casos de traumatismos de mama, observados en la práctica hospitalaria y privada, clasificados de la siguiente manera: 1) Contusiones y heridas leves y moderadas: 11 casos; 2) Contusiones y heridas graves 24 casos y 3) Cuerpos extraños 10 casos. Las contusiones y heridas graves estuvieron integradas, a vez, por: a) contusiones graves (7 casos); b) heridas contusas graves (2 casos); c) heridas punzantes y/o cortantes (8 casos) y d) heridas por arma de fuego (7 casos). Se destaca la posibilidad de que, en heridas penetrantes, la lesión mamaria sea la puerta de entrada al tórax. En este caso las características del compromiso intratorácico marcarán la táctica terapéutica. La lesión mamaria en sí se tratará médicamente o con sutura, según las características y profundidad, tratando de prevenir la complicación infecciosa. Los cuerpos extraños metálicos son raros y se preconiza su extracción. De los no metálicos, los más importantes y frecuentes son los implantes de material protésico con fines estéticos, que producen una situación traumática cuando no son tolerados (por material inadecuado, mala técnica o rotura de prótesis). En estos casos deben extraerse. Se originan a veces, secundariamente, colagenopatías autoinmunes que no curan con la extracción del cuerpo extraño

La utilización del polímero osteoconductor biocompatible POB en fracturas de órbita y fronto orbitarias / The use of biocompatible osteoconductor polymer BOP in fractures of the orbit or fronto-orbital regions

Desde hace muchos años, diferentes materiales han sido usados en el tratamiento de las fracturas orbitarias y fronto orbitarias. Estos materiales generalmente han sido silastic, proplast, hidroxihapatita e injertos óseos autólogos u homólogos. Sin embargo, desde hace 13 años se desarrolló en la Unión Soviética un compuesto de N-vinyl 2 pirrolidona, líquido de color amarillo soluble en metanol, acetona, metilmetacrilato, gluconato de calcio y fibras de poliamida a alta tensión, este material fue denominado Polímero Osteoconductor Biocompartible (POB). Se reportan los resultados preliminares de 20 casos de fracturas tratadas con este polímero, en los que se observó que no hubo complicaciones y se corroboró que el POB es un material inerte, no tóxico y biocompatible útil para corregir asimetrías faciales. No obstante los resultados positivos a la fecha, se sugiere vigilar los casos por un periodo largo, con objeto de asegurar la osteointegración del polímero. La razón del éxito en las 20 fracturas se debe a la utilización del POB como un implante más que como injerto, en una zona de efectos biomecánico mínimos

Laceraçöes dos canalículos lacrimais / Lacrimal canalicular lacerations

Este artigo no relato de 21 anos de laceraçöes de canalículos lacrimais, no período de 1984 a 1990 e a nossa experiência nas diferentes técnicas cirúrgicas de reconstruçäo