4 research outputs found
Microtensile bond strength of ceramic to resin using different silanes
Oral Session - Dental Materials 1: Adhesion - Bond Strength Testing and Mechanisms: 9. Cement Adhesion to Ceramics: no. 27OBJECTIVES: The purpose of this study was to assess the micro-tensile bond strength of a leucite-reinforced feldspathic ceramic to a resin cement using different types of silane primers. METHODS: 18 leucite-reinforced feldspathic ceramic blocks (Ceramco II, Dentsply) in dimensional of 6×6×6 mm were fabricated. The ceramic blocks were ground on wet SiC papers and then cleansed ultrasonically in distilled water. The bonding ceramic surfaces were treated with different silane solutions as follows: Commercial silane as control: Monobond S (Ivoclar-Vivadent); methacryloxypropyl silane and experimental silanes with two concentrations (1% and 2.5%): amino, isocyanate, styryl, and acrylate silanes. The silane application method consisted of ...postprin
Use of a new multiplex quantitative polymerase chain reaction based assay for simultaneous detection of Neisseria meningitidis, Escherichia coli K , Streptococcus agalactiae, and Streptococcus pneumoniae
Background and Objectives: Neisseria meningitidis, Escherichia coli K , Streptococcus agalactiae, and Streptococcus
pneumoniae cause 90% of bacterial meningitis. Almost all infected people die or have irreversible neurological complications. Therefore, it is essential to have a diagnostic kit with the ability to quickly detect these fatal infections.
Materials and Methods: The project involved 212 patients from whom cerebrospinal fluid samples were obtained. After
total genome extraction and performing multiplex quantitative polymerase chain reaction (qPCR), the presence or absence
of each infectious factor was determined by comparing with standard strains.
Results: The specificity, sensitivity, positive predictive value, and negative predictive value calculated were 100%, 92.9%,
50%, and 100%, respectively. So, due to the high specificity and sensitivity of the designed primers, they can be used instead
of bacterial culture that takes at least 24 to 48 hours.
Conclusion: The remarkable benefit of this method is associated with the speed (up to 3 hours) at which the procedure could
be completed. It is also worth noting that this method can reduce the personnel unintentional errors which may occur in the
laboratory. On the other hand, as this method simultaneously identifies four common factors that cause bacterial meningitis,
it could be used as an auxiliary method diagnostic technique in laboratories particularly in cases of emergency medicine.
Keywords: Cerebrospinal fluid; Meningitis; Quantitative polymerase chain reaction; Simultaneous detection; Diagnosis
testin