ABSTRACT
O objetivo deste trabalho foi avaliar a capacidade seladora de um material restaurador provisório, Villevie, e de uma resina composta, Tetric Ceram, associada a dois tipos de sistema adesivos, XENO III e Single Bond. Quarenta incisivos inferiores unirradiculares foram distribuídos em três grupos de dez dentes cada e cinco dentes para cada grupo controle, positivo e negativo. Os espécimes, após a cirurgia de acesso, foram preparados por meio de sistema de instrumentação rotatória e irrigados com água destilada e deionizada. A porção externa dos dentes foi impermeabilizada até 2 mm aquém da margem externa da cirurgia de acesso. Colocou-se no interior do canal radicular um cone de papel seguido de uma pensa de algodão impregnados com solução alcoólica de dimetilglioxima 1%. A cavidade endodôntica foi selada de acordo com os seguintes grupos: GA- sistema adesivo autocondicionante XENO III + resina composta; GB- sistema adesivo Single Bond + resina composta; e GC- selador provisório. Os espécimes foram imersos em recipientes contendo solução de sulfato de níquel 5% e submetidos à ciclagem térmica por 72h. Os testes de Kruskal-Wallis e Dunn foram utilizados para análise dos resultados com nível de 5% de signifcância. O menor nível de microinfltração foi observado no grupo do restaurador provisório (GC), com diferença estatística signifcante em relação aos demais grupos (P<0,001). Os grupos A e B mostraram-se semelhantes ao controle positivo (P>0,05), com os maiores índices de microinfltração. Concluiu-se que nenhum dos materiais avaliados foi capaz de impedir a microinfltração coronária.
The purpose of this study was to evaluate the sealing capacity of a temporary restorative material (Villevie) and a composite resin, Tetric Ceram, associated with two adhesive systems (XENO III and Single Bond). Forty single-rooted mandibular incisors were distributed into three experimental groups of 10 teeth each, and two control groups (positive and negative) of 5 teeth each. After preparation of the access cavities, the canals were instrumented with a rotary system and irrigated with distilled deionized water. The external surfaces of the teeth were rendered water-proof up to 2 mm from the external margins of the access cavities. A paper point and a coton mesh impregnated with an alcoholic 1% dimethylglyoxime were placed inside the root canals, and the endodontic access cavities were sealed according to the following groups: GA- XENO III self-etch adhesive system + composite resin; GB- Single Bond etch-and-rinse adhesive system + composite resin; and GC- temporary restorative material. The specimens were immersed in receptacles containing a 5% nickel sulfate solution and subjected to a thermal cycling regimen during 72 h. The Kruskal-Wallis and Dunn's tests were used for statistical analysis of the results at 5% signifcance level. The group restored with the temporary restorative material (GC) presented statistically signifcant less coronal leakage than the other groups (p<0.001). GA and GB were statistically similar to the positive control (p>0.05), showing the highest levels of coronal leakage. None of the tested materials was able to prevent the occurrence of coronal leakage.
ABSTRACT
Introdução: A melhor forma de quantificar a dose de diálise em pacientes com insuficiência renal aguda (IRA) ainda não está estabelecida. O b j e t i v o s :Avaliar a dose de diálise recebida pela maneira tradicional (PRU e Kt/V) e através da quantificação direta do dialisato em pacientes com IRA. M é t o d o s :A dose de diálise foi quantificada pelo percentual de redução de uréia (PRU), Kt/V (spKt/V e eKt/V) e massa extraída de uréia no dialisato (coleta parcialpor dispositivo automatizado) em pacientes com IRA submetidos à hemodiálise prolongada em unidade de terapia intensiva (UTI). Pacientes cominsuficiência renal crônica (IRC) em programa de diálise serviram como grupo controle. Resultados: Foram realizadas 11 sessões de hemodiáliseprolongada em 8 pacientes com IRA e 8 sessões de hemodiálise convencional em 5 pacientes com IRC. O PRU foi maior nos pacientes com IRC (67%;62-74% v s 54%; 37-57%; P<0,01), assim como o spKt/V (1,31;1,15-1,62 vs 0,90;0,55-1,01; P<0,01) e o eKt/V (1,15; 1,03-1,44 vs 0,69;0,47-0,92; P<0,01).Não houve diferença com relação à massa extraída de uréia no dialisato entre as sessões de hemodiálise convencional (32,6 g; 24,4-56,1) e prolongada(31,8 g; 18,2-88,8). Conclusões: Apesar da maior dose de diálise recebida nos pacientes com IRC, quando avaliada pelo PRU e Kt/V, não houvediferença na massa extraída de uréia no dialisato. Possivelmente, os valores de normalidade definidos pelo método clássico de cinética de uréia parapacientes com IRC não se aplicam a pacientes com IRA e a aferição da dose de diálise pelo dialisato pode ser uma alternativa viável nestes pacientes.
Introduction: The best way for dialysis quantification in patients with acute renal failure (ARF) is not defined. Objectives: Evaluate the delivered dialysisdose by the traditional methods (URR and Kt/V) and by the direct dialysate quantification in patients with acute renal failure. Methods: The dialysis dosewas measured by urea reduction rate (URR), Kt/V (spKt/V, eKt/V) and urea extracted mass in the dialysate (partial dialysate collection by automatic device)in acute renal failure (ARF) patients submitted to extended dialysis in intensive care unit (ICU). Chronic renal failure (CRF) patients were the control group.Results: Eleven extended hemodialysis sessions in eight patients with ARF and eight conventional hemodialysis sessions in five CRF patients wereevaluated. The URR was higher in CRF patients (67%; 62-74% vs 54%; 37-57%; P<0.01) as the spKt/V (1.31;1.15-1.62 vs 0.90;0.55-1.01; P<0.01) andeKt/V (1.15; 1.03-1.44 vs 0.69;0.47-0.92; P<0.01). There was no difference regarding the urea extracted mass in the dialysate in the conventional (32.6 g;24.4-56.1) and extended hemodialysis (31.8 g; 18.2-88.8). Conclusions: In spite of CRF patients have received a higher dialysis dose when evaluated byURR and Kt/V, there was no difference in the urea extracted mass in the dialysate. The classical urea kinetic model may be not applicable for ARF patientsand the evaluation of the dialysate can be an alternative for measurement of dialysis dose in these patients.
Subject(s)
Humans , Male , Female , Middle Aged , Renal Dialysis , Acute Kidney Injury/therapy , Dialysis Solutions/therapeutic useABSTRACT
This work was conducted on rats in two premises located in Niterói and Rio de Janeiro, Brazil. One is classified as conventional controlled and the other, conventional. The objective of the present study was to detect the presence of Mycoplasma pulmonis in animals with symptoms of respiratory disease and low reproductive performance. In the conventional controlled premises, 16 rats of Wistar-Furth strain were necropsied while in the conventional premises necropsy was performed on 12 rats of Hooded Lister strain. The clinical samples of lungs, trachea, oropharynx, middle ear, uterus and ovaries were subjected to culturing while the sera were tested for antibody detection. From 28 rats, 57.14 percent (16/28) were culture positive for M. pulmonis, being 81.25 percent (13/16) from the conventional controlled premises, and 25.00 percent (3/12) from the conventional premises. The ELISA test was carried out in 20 animals of both colonies. In the conventional controlled premises, 92.86 percent (13/14) were positive for M. pulmonis, and 7.14 percent (1/14) were suspicious, while in the conventional premises, 100 percent (6/6) of the samples were positive. The results confirmed that M. pulmonis was the etiologic agent of the disease that affected the rats under study, and that the ELISA positivity rated higher than culture