Studies for Superstructure in the Implant

-Relationship between Room Temperature andFitness for Superstructure in the Implant-

Abstract

It is important to obtain exact fitting of the abutment supported restoration cases to maintain the longevity of osseointegration. In order to reveal the influence of laboratory temperature on the properties of the quick heating investment, the calorific values of mold, the setting expansion, heat expansion and casting shrinkage were measured at 16℃,23℃ and 30℃ under 60% humidity.
The results were as follows:
1. With a rise in room temperature, the calorific value increased.
2. WM had higher calorific value than Q1 and Q2.
3. With a rise in room temperature, the setting expansion was increased.
4. With a rise in room temperature, the heat expansion of Q1 and WM were decreased.
5. With a rise in room temperature, the wax pattern was melted inside the mold.
6. With a rise in room temperature, the casting shrinkage was decreased.