TY - JOUR
T1 - Dimensional accuracy of castable apatite ceramic crowns
T2 - The influence of heat treatment on dimensional changes and distortion of crowns
AU - Ishida, Hiroshi
AU - Nahara, Yukinori
AU - Hamada, Taizo
PY - 1992/8
Y1 - 1992/8
N2 - Castable apatite ceramic crowns are subjected to heat treatment during crystallizing and during coloring after casting. The dimensional accuracy of the heat-treated crowns was investigated with respect to its influence on dimensional changes in castable apatite ceramic crowns and on distortion of the interior of the crowns, using two investment techniques and a three-coordinate measuring machine. Dimensional changes were not influenced by the number of coloring firings. Distortion of the interior of crowns was slightly outward at the gingival plane. Shrinkage because of crystallizing was approximately 20 μm and the shrinkage of the gingival plane was equal to that of the occlusal plane.
AB - Castable apatite ceramic crowns are subjected to heat treatment during crystallizing and during coloring after casting. The dimensional accuracy of the heat-treated crowns was investigated with respect to its influence on dimensional changes in castable apatite ceramic crowns and on distortion of the interior of the crowns, using two investment techniques and a three-coordinate measuring machine. Dimensional changes were not influenced by the number of coloring firings. Distortion of the interior of crowns was slightly outward at the gingival plane. Shrinkage because of crystallizing was approximately 20 μm and the shrinkage of the gingival plane was equal to that of the occlusal plane.
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U2 - 10.1016/0022-3913(92)90330-D
DO - 10.1016/0022-3913(92)90330-D
M3 - Article
C2 - 1501175
AN - SCOPUS:0026900903
VL - 68
SP - 279
EP - 283
JO - Journal of Prosthetic Dentistry
JF - Journal of Prosthetic Dentistry
SN - 0022-3913
IS - 2
ER -