SU1225564A1 - Method of manufacturing semicrown - Google Patents

Description

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The invention relates to medidane, specifically to orthopedic dentistry.

The purpose of the invention is to improve the quality of manufacturing of the semi-funnel due to the accuracy of modeling.

FIG. 1 shows a matrix., Made in the form of a tooth | Fig 2 is the same, with gating holes | in fig. 3 - the same, after modeling the inner surface and installing the sprues; in fig. 4 - semi-skeletons, general view.

The method of making the half-funnel is carried out as follows.

At first, a visit to the patient is performed to prepare the tooth. Then get the print one of the known methods and cast a plaster model. After that, the tooth delineates the boundaries of the future half-coring and, with the steel sleeve, using a stamping method, make a matrix 1 along the boundaries of the future semi-coring. Then, in the center of the occlusal surface of the matrix 1, a central sprue 2 is drilled, with a diameter of 2.0-2.5 MMj, and two holes 3 with a diameter of IjO-1.5 mm are punched on its approximating walls to reject the wax and exit the metal in the process. pour. G {after this, the matrix 1 is thoroughly bleached.

On the second visit of the patient, the matrix 1 is fitted, the boundaries of the future half-corpuscle are adjusted accordingly and the occlusal relationship with the teeth is antagonized. Then they are formed on it.

The spasmodic tooth is transverse and longitudinal grooves, observing the binding and create a ledge in the area of the tooth neck. The fat-free matrix 1 is filled with j; with fused wax and put it on the tooth, taking into account the initial boundaries. Excess wax is removed, the Matrix 1 is gently retracted from the neck by 3-4 and smooth movements - Ijj mn is set in place. The fitting of matrix 1 is carried out 2-3 times for the purpose of final modeling from transverse and longitudinal grooves, to remove retention points and to form a way of introducing the half-coring.

in place of the “Wax imprint 4 on the matrix d.pjean, have clear contours with a smooth surface without defects and a deflection J th. The resulting model is transferred to the foundry laboratory by a 20-hole mold, where the wax is replaced with metal by casting the sprue 5 installed above the central spruing hole 2. To spread the metal evenly along the inner surface of the matrix 1 outside the lateral holes 3, a depot for metal in the form of waste gates 7 5 a on the central sprue channel at a distance of 2-2.5 IVSM from the inlet create a profit 6. The combined die-cast-semi-funnel combined has a cast inner surface 9, a monolith but connected to the outer matrix 1 by mechanical retention in the region of the central sprue 2 and lateral apertures 3 and the surface melting of the metal 8.

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Claims (1)

METHOD FOR PRODUCING A SEMI-CROWN, including preparation of a tooth, manufacturing of a thin-walled metal matrix corresponding to the shape of the tooth, characterized in that, in order to improve the quality of manufacturing a half-crown, in the thin-walled metal matrix, gating holes are made on its occlusal surface and approximate walls, and a transverse tooth is formed and longitudinal grooves, after which a thin-walled metal matrix is filled with wax and an impression is taken from the prepared tooth, followed by wax replacement metal. Figure 1 No. SL SL