THERMAL LINEAR EXPANSION AND RESIDUE OF DENTAL INLAY WAXES WITH LOCAL PARAFFIN
نویسندگان
چکیده
منابع مشابه
Thermal analysis of dental impression waxes.
Ten dental impression waxes were characterized by penetration and differential thermal analysis. Penetration and initial transition temperatures were directly correlated. Penetration at 37 C ranged from 2.5 to 22% for bite waxes and was 100% for corrective waxes. Distortion of an impression wax may occur upon removal from the mouth.
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Since phase changes generally result in dimensional changes, the temperatures at which the phase changes occur in waxes and the influence of adding one wax to another are important in understanding the behavior of waxes. Differential thermal analysis (DTA) offers a useful tool in the study of phase transitions. This study examines the temperature of phase transitions for various commercial, den...
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The use of a LED fiber-optic sensor to measure displacement and linear thermal expansion is described. It has a sensitivity of about 0.6 mV/mm, a resolution of 1.25 mm, and a dynamic rang of 400 mm for displacement measurements. For thermal expansion, it shows a sensitivity of about 3.5 mV/C, and the experimental linear expansion values are in agreement with those calculated. The reported senso...
متن کاملPenetration of commercial and dental waxes.
Thermomechanical analysis (TMA) measures the mechanical response of a material as it is programmed linearly through a selected temperature range.' The techniques used in TMA include linear expansion, volumetric expansion, tensile elongation, torsional modulus, and penetration. Comparison of TMA penetration curves with curves of transition temperatures obtained from differential thermal analysis...
متن کاملCalorimetric analysis of commercial and dental waxes.
Dental waxes are often a blend of several waxes that are necessary to develop the most desirable qualities. In general, more information is available on physical properties and manipulation of dental waxes than on the composition or nature of the ingredients. Since heats of transition are fundamental in characterizing the chemical nature of matter, this information was obtained from waxes and b...
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ژورنال
عنوان ژورنال: Jurnal Teknosains
سال: 2020
ISSN: 2443-1311,2089-6131
DOI: 10.22146/teknosains.46548