| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to easily withdraw a molded resin prototype from a cavity part by forming a resin shell to an external shape which is a foundation for a dental crown shape and forming a thin and transparent resin hollow body which is provided with a small projection for pickup on its peak part and has a broad aperture. SOLUTION: The shell 1 for an anterior tooth approximated to the shape of the dental crown of the anterior tooth is formed to the thin hollow shape of the transparent synthetic resin. Its external shape is formed to an incisal shape pointed in an upper part 13. It peak part 13 is projectingly provided with small tongue-shaped projection 15 for pickup and the lower part is formed as the wide aperture 11 continuous with the hollow part 10 on the inner side. The shell 1 for a molar approximated to the shape of the peak part of the molar is formed of the resin formed to a transparent and thin hollow shape and the outside shape is formed to the molar shape, the upper part 13 of which has a large diameter. The center 14 at its peak part is recessed and the central part 14 is projectingly provided with the small tongue-shaped projection 15. The lower part is formed as the wide aperture 11 continuous with the hollow part 10 on the inner side. The resin shell of the dental photopolymn. type resin prototype may be directly put and adhered onto the resin of a photopolymn. type packed into the cavity part of the tooth and may be withdrawn as it is. |
