Abstract
The purpose of this investigation was to clarify thermal behavion of dental amalgam.In this investigation, the effect of temperature on the transitions of the γ1, γ2 and β1 phases was clarified by using X-ray diffraction analysis.
The obtained results were as follows:
1.For low copper amalgam, the peaks of the γ2 phase disappeared into the background at about 73℃.
2.The γ1→β1 transition was affected more remarkably by the temperature than by the time elapsed from start of trituration.
3.In case of rising temperature, the peaks of the β1 phase appeared at about 73℃ in both high and low copper amalgam. Contrary to this, the peaks of the γ1 phase disappeared in high copper amalgam at higher temperature than in low copper amalgam.
4.In case of falling temperature, the peaks of the γ1 phase appeared at about 40℃ in low copper amalgam, but between 60 and 70℃ in high copper amalgam.
