Effect Of Ridge-lap Surface Treatments On The Bond Of Resin Teeth To Denture Base.

To test in vitro the shear bond strength of resin teeth to an acrylic resin denture base given different ridgelap surface treatments. Ninety rectangular dies were made with wax and traditionally invested in metallic or plastic flasks. The stone molds were covered with silicone, in which were included an acrylic molar with a wax stick fixed on the ridge lap surface. After deflasking, the wax sticks were removed, the teeth were cleaned with detergent, the ridge lap surface was submitted to different treatments (unmodified, bur-cut grooves, aluminum oxide particle sandblasting, monomer swelling, and primer swelling), and the teeth were replaced in the silicone molds. Metallic flasks were placed in a thermopolymerizing unit to polymerize heat-curing denture-base polymer, and plastic flasks were placed in a domestic microwave oven at 900 W to polymerize microwaveable denture base polymer. After deflasking, the specimens were submitted to the shear bond test in an Instron machine at a cross-speed of 1 mm/min. Results were submitted to ANOVA and Tukey's test (5%). Shear bond strength values were influenced by the ridge-lap surface treatments only in the microwaved polymer. Sandblasting + monomer swelling and sandblasting + primer swelling interactions yielded lower strengths for microwaved polymer. Only the unmodified surfaces presented a significant difference when the resins were compared, where the microwaved polymer showed a higher value. Different tooth ridge-lap surface treatments promoted different strengths of the tooth/resin bond.13287-9

Antimicrobial resistance on Staphylococcus aureus isolated from cases subclinical mastitis in goats.

Caprine mastitis is one of the most common diseases in dairy herds, causing damage mainly due to the decrease in milk production after the invasion of the infectious agent in the secretory epithelium of the mammary gland. Species Staphylococcus aureus is the most pathogenic agent in the mammary gland, having important implications for public health, since it produces enterotoxins that survive the heat treatments applied to milk. The use of proper antibiotics is an important tool for the treatment of the disease. However, they should be used judiciously, since the main cause of failure in therapy is bacterial resistance to the drug. This study uses an antibiogram to evaluate the resistance of microorganisms isolated from goat milk samples with subclinical mastitis. Antibiotics ampicillin and rifampicin showed 50% resistance in strains from Minas Gerais and 83.3% in strains from São Paulo, respectively, which would be ineffective in the treatment of mastitis in these herds. Therefore, the use of antibiogram as a control tool helps Veterinarians and owners in decision making regarding the appropriate treatment

Genomic homeology between Pennisetum purpureum and Pennisetum glaucum (Poaceae).

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