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Abstract
The purpose of this study is to investigate the influence of three marginal shape of abutment teeth (Flat, Moderate and Steep) on the fitness of castable glass ceramics (DICOR) crown clinically. The following results were obtained: 1. The change of width of three marginal shapes showed the same tendency on each firing procedure. 2. The vertical change of three marginal shapes showed the most constant on Flat and decreased on Steep. 3. On the marginal edge, the Labiopalatal gaps were larger than Mesiodistal gaps. 4. On Labiopalatal section, the gaps of Steep were larger than those of Flat and Moderate especially as cast. 5. The gaps Flat were almost same on Labial, Palatal, Mesial and Distal parts.
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