JPH07178121A - Manufacturing method of work model of tooth profile and apparatus therefor - Google Patents

Abstract

PURPOSE:To cut time required for manufacturing a work model of tooth profile by preparing in advance a holding frame with palate eminence, gingiva part and in-between part of gingiva and cheek formed, utilizing a rubber mold, as well as to attain cost reduction by limiting the use of expensive superanhydrite or anhydrite only to the second gypsum. CONSTITUTION:For manufacturing a work model of tooth profile, a rubber mold 2 to manufacture a holding frame 1 for holding the work model and settling the same to the articulator is prepared firstly. The rubber mold 2 has a groove 4, to form the gingiva part 3, along its semicircular shape, a C-shaped convex 5 along the groove 4, which corresponds to the dentition part, and a concave 6 provided inside such convex. A tongue 8 is provided protrudingly from the diametral position 9, with its bottom covering the molded concave 7 of the palate eminence 19, leaving a slight gap between the convex 5. After the holding frame 1 being molded by pouring rubber or silicone, utilizing such rubber mold 2, the blocked first gypsum model of tooth profile is set on the holding frame l, and the desired work model is manufactured by pouring the second gypsum thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a working tooth model.

[0002]

2. Description of the Related Art A conventional working model is manufactured by forming a reference surface by trimming a plaster tooth model modeled by a dentist under the dental technician on the alveolar side opposite to the tooth tips. A hole is made in this reference surface with a pin drill or pin erection machine, a dowel pin is erected in this hole, it is solidified with an adhesive, resin or gypsum for planting, and then the extra resin or gypsum raised on the reference surface is knifed. It is scraped off with. Then, after applying the gypsum separating agent on the reference surface, a secondary plaster of hard gypsum is poured into the rubber frame, and the dowel pin portion is embedded to produce a working model. When making a prosthesis, plaster is placed on the articulator to fix the working model to the mounting ring in order to consider the occlusion.
It is attached using a magnet plate.

[0003]

Since the conventional working tooth model has plaster mounted on the manting ring of the articulator and fixed, one model can be used even for left and right or one-jaw working models. Could be fixed to only one articulator.

Since the frame of the pliable model using dowel pins uses gypsum, it cannot be reused and must be disposed of as waste as it is, which is uneconomical.

In the conventional manufacturing method, a working model is manufactured, steps are taken step by step, and then the model is fixed to the mounting ring of the articulator. Therefore, the model is fixed to the articulator only after the model is manufactured. This is inconvenient when you want to make a prosthesis immediately.

Further, in order to prevent the midline from shifting when fixing the working model to the articulator, that is, in order to fix it correctly at the left and right symmetrical positions, it is necessary that the articulator has no face bow transfer. It is difficult to position accurately.

After the dowel pins are further planted, the secondary gypsum is poured in, and then the dowel pins are removed, a hole is made at the tip of the dowel pin so that dust can be discharged even when the dowel pin is bored. Although it is necessary to keep in mind, if the conventional method of pouring secondary gypsum is to bury the dowel pin in the lower part, after pouring the secondary gypsum, locate the tip of the dowel pin and look for it, such as a chisel The tip of the dowel pin must be exposed while scraping the plaster with, which is troublesome and requires skill.

Further, according to the conventional method, when pouring the secondary gypsum, air bubbles may be generated around the dowel pin and the abutment teeth may become loose.

[0009]

According to the present invention, a mount plate having a locking portion such as an outer groove is fixed to a mounting ring of an articulator, while the mount plate is attached to a holding frame for holding a working model. The working model can be easily fixed to the articulator by forming an engaging part such as an inner groove that engages with the locking part of the device, and can be removed at any time when necessary. This also makes the holding frame economical as it can be used any number of times. Also, with this holding frame, it is possible to pour secondary gypsum, align the midline of the working model, and mold so that the tip of the dowel pin is exposed.Furthermore, pour secondary gypsum from the dowel pin side of the holding frame. By making it possible, it is possible to use a vibrator and prevent bubbles from forming.

Furthermore, according to the present invention, since the palate ridge, the gingival portion and the gingival cheek transitional portion are formed in the holding frame and the shape of the whole jaw is reproduced, the work can be performed practically, which is advantageous.

In order to manufacture this holding frame, the dentition and palate ridges, the gingival part and the gingival cheek transition part are made to be convex at their respective heights, and for the lower jaw, the lower lip band and the upper jaw. The holding frame can be molded by using a rubber mold having a convex upper lip band and a palate raphe.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the manufacturing method of the present invention, first, a rubber mold for holding a working model and manufacturing a holding frame 1 for fixing it to an articulator must be prepared.

As shown in the partially broken perspective view of FIG. 1 and the sectional view of FIG. 2, the rubber mold is formed along the semicircle of the semicircular rubber mold 2 for forming the gingival part 3. A C-shaped convex portion 5 corresponding to the tooth row portion via the groove 4, a semi-circular concave portion 6 at the inner center thereof, and a molding concave surface 7 of the palate protrusion 19 at the bottom surface thereof, and this molding concave surface 7 The tongue piece 8 so as to cover the toothed portion hole forming convex portion 5 with a slight gap.
Are projected from the diameter side 9. The center of the peripheral surface of the tongue piece 8 is a convex band 8a, which is a groove forming portion for engaging with the mount plate. The rubber frame 2 is used to mold the holding frame 1 for holding the working model by pouring rubber or silicon.

Next, the primary plaster tooth model cast by a dentist is trimmed on the alveolar side opposite to the tooth tips to form a reference surface 10, and the dowel pin 11 is planted on this reference surface to form the plaster tooth model. The model is coated with a gypsum separating agent and partially fixed on the holding frame 1 with an adhesive or a wax. At this time, the dowel pins 11 that have been planted are located in the tooth row holes 12, and the holding frame 1 The secondary plaster 13 is poured from the bottom surface of the so that the tip of the dowel pin is exposed, and a working model is manufactured.

On the other hand, on the mount plate 14 fixed to the mounting ring of the articulator, the engaging portion 16 of the engaging groove 15 formed in the holding frame 1 is formed to be convex, and this working model with a holding frame is It is fixed to the articulator via the mount plate 14.

In the rubber mold 2, a concave portion for forming the upper lip band or the lower lip band 17 (see FIG. 2) and the palate sewing line 18 is previously formed on the bottom surface of the groove 4 for forming the gingiva and a molding concave surface of the palate protrusion. 7
Each part is formed in the holding frame 1 by providing the
It is advantageous to facilitate the alignment of the positions of the primary gypsum model and the holding frame 1.

Further, when pouring the secondary gypsum into the holding frame 1 from the dowel pin side, it is possible to use a vibrator.

[0018]

According to the present invention, a rubber form is used,
By pre-manufacturing the holding frame with the palate protrusion, the gingiva part and the gingiva-cheek transition part, it is possible to shorten the manufacturing time of the working model and pour it into the dentition part hole of the holding frame. Only a small amount of high-priced ultra-hard gypsum or anhydrite can be used only for secondary gypsum, which saves costs, and because the holding frame is pre-attached with the upper lip bandage and palate raphe, plaster tooth mold When fixing the model to the holding frame, accurate work is possible without being distorted or tilted, and since it is only partially fixed with an adhesive or wax, no skill is required.
It is economical because the holding frame can be used any number of times after use.

Further, the work model and the articulator are also fixed only by engaging the engaging concave and convex portions formed on the both, so that the fixing and the removal are easy, and when it is necessary to finish the prosthesis promptly, Even before the work model is completed, it is possible to fix it to the articulator and proceed with the work, so it is possible to respond in an emergency.

Furthermore, since the secondary gypsum is poured from the open portion of the bottom surface of the holding frame, it is possible to use a vibrator and prevent the generation of gaps and bubbles. Therefore, in the conventional case, especially when using divided teeth. , It was difficult to obtain the restored position again, but the present invention does not have such a drawback. The amount of secondary gypsum can be poured while observing the dowel pin, without the need to scrape off the gypsum with a chisel to expose the tip of the dowel pin.

[Brief description of drawings]

FIG. 1 is a perspective view showing a cross section of a part of a rubber mold.

FIG. 2 is a sectional view of a rubber mold.

FIG. 3 is a perspective view of a holding frame.

FIG. 4 is a rear view of the holding frame.

FIG. 5 is a view showing a state where a primary plaster tooth model is trimmed to form a reference surface and dowel pins are planted.

FIG. 6 is a view showing a state in which secondary gypsum is poured.

FIG. 7 is a perspective view of a mount plate.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Holding frame 2 Rubber mold 3 Gingival part 4 Gingival part forming groove 5 Dental part hole forming convex part 8 Tongue piece 10 Reference surface 11 Dowel pin 12 Dental part hole 13 Secondary plaster 14 Mount plate 15 For engaging Groove 16 Locking part 17 Lower lip band 18 Palate raphe 19 Palate protrusion

Claims (3)

[Claims] 1. A reference frame is formed by trimming a primary gypsum tooth model on a holding frame having a C-shaped tooth row hole, a gingival part in the periphery, and a palate protrusion in the center. Dowel pins are planted on the reference surface, the dowel pins are positioned in the tooth row holes of the holding frame, and the primary gypsum model is partially fixed on the holding frame with an adhesive or wax, and this holding A method of manufacturing a working model in which secondary gypsum is poured from the bottom of the frame into the hole for the dentition so that the tip of the dowel pin is exposed. 2. A work having an engaging hole formed in a mount plate for fixing to a mounting ring of an articulator, the hole having a secondary gypsum casting hole for a dentition part. A holding frame for the model. 3. A groove having a convex portion for forming a gingiva portion on a bottom surface along a semicircular semicircular shape, a C-shaped convex portion for forming a tooth row portion hole therein, and further an inner center portion. A tongue piece having a molding concave surface that forms a palate protrusion on the molding concave surface, and having a space on the molding concave surface, and having a convex band at the center of the peripheral surface, is projected horizontally from the diameter side. A rubber mold having a groove for forming an upper lip band or a lower lip band and a molding concave surface forming the palate ridge, and a groove for forming a palate sewing line.