ＣＡＤによる菌冠形態設計法の研究

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  • A Study of Design for Coronal Morphology by Means of CAD.

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Recently, various approaches have been conducted to apply CAD/CAM into the field of prosthodontics. Successive studies on a computer-aided approach to construction of coronal restoration were performed at our Dept. since 1984.<BR>The purpose of this study is to explain our method of measuring the prepared tooth placing the master pattern and modifying it according to an individual morphology of each tooth by CAD.<BR>The procedures can be successfully performed in the following ways by means of 3-D Measurement-Milling Apparatus (Type A-1) developed by our Dept.<BR>1. The application of the polar coordinates measurement of the master pattern makes it possible to display the occlusal surface and contact relationships between maxillary and mandibular teeth.<BR>2. The cervical margin is measured in a rate of 50μm with each interval of 1mm in vertical direction utilizing the cyrindrical coordinate that determines azimuth with 0.5 degrees.<BR>3. Finally, the occlusal surface of the master pattern and marginal line are connected by Hermite Curve, then the design of external contour is completed by CAD.

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