Author examined clinical procedure, clinical application and clinical failure of castable glass ceramic (Dicor) crowns which were made at the Dept. of Prosthodontics, Seoul National University Hospital during 19 months from Jan. 1988 to July, 1989(Observation period:19 months). The author obtained the following results. 1. A total of 86 crowns were constructed ; Most of them has been set on maxillary central incisors(53 cases, 62%):maxillary lateral incisors(20 cases, 23%):maxillary canines(6 cases, 7%):others(7 cases, 8%) 2. Dicer could be used as a lamiate veneer for discolored tooth. 3. During the examination period(1-19 months), there was no fracture case. 4. Dicer could be applied on the maxillary anterior tooth with minimal occlusal force.
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