RESUMEN
The disadvantages of an open-type hollow obturator include difficulty in polishing and cleaning of the internal surface, food accumulation in the hollow obturator and inability to obtain support from the superior aspect in the defect area. This article describes and easy time-saving procedure that uses visible light-activated denture base materials as a reline material to close an open type interim obturator. This procedure can be used successfully for both late stage interim obturators and/or for correcting leakage problems for patients who wear definitive obturators.
Asunto(s)
Rebasado de Dentaduras/métodos , Obturadores Palatinos , Resinas Acrílicas , Alineadores Dentales , HumanosRESUMEN
Ion-sensitive electrode potentiometry is proposed for determination of substituent constants for structural modifications of organic acids. A liquid membrane anion-sensitive electrode responds reproducibly to a wide range of carboxylate and sulfonate ions. Fragment constants for the addition of a methylene group to aromatic and aliphatic acids are -2.4 and -3.3 +/- 0.15 kJ/mol, respectively. Agreement is observed between these constants and those determined by other techniques, including partitioning studies in biphasic systems, suggesting the use of potentiometry for quantitative structure-activity relationship studies. Furthermore, the electrode measurements correlate with biological effects resulting from hydrophobic interactions.
Asunto(s)
Aniones , Benzoatos , Ácidos Carboxílicos , Fenómenos Químicos , Química Física , Electrodos , Ácidos Grasos , Matemática , Potenciometría , Relación Estructura-ActividadAsunto(s)
Curare/análisis , Medicina Legal , Adulto , Anciano , Preescolar , Femenino , Humanos , Masculino , Métodos , Persona de Mediana Edad , New Jersey , Tubocurarina/análisisRESUMEN
Two macroreticular chelating ion-exchangers have been prepared and characterized. One contains the iminodiacetate group and the second contains the arsonate group as the ion-exchanging site. The macroreticular resins show selectivities among metal ions similar to those of the commercially available naicroreticular chelating resins. Chromatographie separations on the new resins are rapid and sharp.