An Experimental Study on Cement Film Thickness Between Casting Restorations and Preparation Walls.

주조물(鑄造物) 접착후(接着後) Cement층(層) 후경측정(厚徑測定)에 관(關)한 실험적(實驗的) 연구(硏究)

The purposes of this study were to measure the film thickness of zinc phosphate cement between the casting restorations and preparation walls. In addition, the differences between finger press and non press techniques after the castings were seated completely on the preparation by an automatic mallet until the cement set were studied. The results were as follows : 1) In full cast crown, the cement film thickness on the side wall was thinner than that on the other walls. 2) In 3/4 crown and inlay, the cement thickness was thinner than that in cast crowns. 3) The cement of great W/P ratio showed thinner thickness than that of little W/P ratio. 4) The continuous finger press after the castings were seated completely on the preparations had few influence on the cement film thickness.