relative solubility of four glass ionomer cements

The purpose of this investigation was to determine and compare the relativesolubility of four different types of glass-ionomer cement. A sample size of20 samples [five samples for each cement] was employed in the present study. From the results obtained, it was concluded that the glass cement demonstratedthe least solubility values, followed by anhydrous and visible light curedglass ionomer cements. On the other hand, the conventional glass ionomercement was found to be the most soluble one, also it was found that, there isno significant difference in the solubility values between anhydrous andvisible light cured glass-ionomer cements

Experimental use of strontium chloride as a capping material

The purpose of the present study was to histopathologically evaluate the pulpalreaction to SrCl2 as a capping material separately and in combination withCa[OH]2. A total of 36 adult male rats with an average age of 8Weeks was selected. They were divided into three groups. Teeth were specified for each capping material as follows: Group I, upper right first molar for capping with Ca[OH]2; group II, upper left first molar for capping with SrCl2; group III, upper left second molar for capping with a mixture of SrCl2 and Ca[OH]2; group IV, upper right second molar and upper left third molar were left intact as control group. From the results obtained, it was concludedthat strontium chloride could be introduced as a pulp capping material underinvestigation. Strontium chloride was supplied in a powder form for thisinvestigation. Further studies are needed to introduce the material in asuitable form for clinical application. Capping with strontium chloridemaintains pulp vitality and stimulates reparative dentin formation. The combination of strontium chloride and calcium hydroxide has a superiorbiological effect on traumatized exposed pulp in the form of milder inflammatoryreaction as well as stimulation of dentin calcification. Further studies areneeded for the determination of the histochemical and biochemical changes thatwould occur in the vital exposed pulp tissue capped with these experimentalmaterials