coefficient of thermal expansion

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coefficient of thermal expansion

The change in the dimensions of a material when its temperature is raised 1°C. In dentistry, if the relative expansion and contraction of restorative materials, casts, or appliances are not accounted for, the patient may have problems with improper fitting, microleakage, or adhesive debonding.
See also: coefficient
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[[Beta].sub.p] = volumetric thermal expansion coefficient of polymer (or cured resin)
To obtain values for the volumetric thermal expansion coefficients, [[Beta].sub.m] and [[Beta].sub.p], thermomechanical analysis (TMA) of a sample that had previously been cured in the dilatometer was conducted to obtain the coefficient of linear expansion for the cured polymer.