JP2001161714A - Dental plaster cast processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dental plaster cast processing device capable of executing the 'drilling process' and the 'grooving process' at the same time by one device, and capable of achieving a stable processing quality in the operation without any special skill. SOLUTION: The dental plaster cast processing device has a hole for inserting and fixing a pin on a flat bottom of a dental plaster cast and a groove around the hole. The device also has a drill for boring a hole and plural drills for grooving. The plural drills for grooving are disposed so that the tops of the drills project obliquely from a horizontal plane orthogonally crossing the drill for boring a hole.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for processing a plaster tooth model for forming a denture, and more particularly, to an apparatus for simultaneously performing pin hole processing and rotation preventing groove processing.

[0002]

2. Description of the Related Art When processing dentures such as inlays, crowns, and bridges by a dental technician, the affected tooth is cut out from the entire plaster tooth model cast by a dentist, and the part is removed as necessary. It can be detached from the whole part and attached to the working support mold created individually for each gypsum tooth model, optimally based on its experience while examining the meshing state with adjacent teeth and mating teeth It has been performed to form into various shapes.

[0003] As a preparation stage before cutting out the tooth portion of the affected part and performing denture processing in this way, 1) a flat processing step of flatly processing the bottom surface of the entire plaster tooth model 2) as shown in FIG. Punching step of providing a plurality of holes h for inserting and fixing a pin for detachably attaching to a working support mold on the bottom surface of the tooth portion and the bottom surface of the portion adjacent to the tooth portion of the affected part 3) FIG. A plurality of grooves g in a direction substantially perpendicular to each of the holes h 4) a groove fixing step 4) a pin fixing step of inserting and fixing a pin in the hole 5) a bottom surface of the entire plaster tooth model to which the pin is fixed. A supporting mold forming step is performed in which a working support die is individually formed for each plaster tooth model by pressing against a plaster for molding.

[0004] Through these steps, the working support mold is integrally formed with a projection that fits into the groove of the entire plaster tooth model. The fitting of the groove and the projection is performed by cutting out the tooth part of the affected part and detaching the part from the entire part, and connecting the gypsum tooth model with the working support mold with the pin. It functions to prevent rotation and rattling with respect to.

[0005]

The "drilling step" and the "grooving step" in the preparation stage before the conventional denture processing are performed by using a dedicated processing tool for each step. . That is, a drilling tool was used in the “punching step”, and a grooving tool was used in the “grooving step”.

For this purpose, two types of tools must be provided, and the operator must learn how to use each tool. Also, after completing the “drilling process” work,
The “grooving process” must be performed in four directions orthogonal to the drilled hole, requiring a considerable amount of man-hours, and a considerable amount of work is required to cut grooves of appropriate depth. Skills are also required.

[0007] An object of the present invention is to solve the above-mentioned problems, and the "punching step" and "grooving step" can be performed simultaneously by one apparatus, and a special technique is not required for operation, and the apparatus is stable. An object of the present invention is to provide a gypsum tooth model processing apparatus capable of obtaining processing quality.

[0008]

According to a first aspect of the present invention, there is provided a hole for inserting and fixing a pin on a flat bottom surface of a plaster tooth model, and a kerf around the hole. Gypsum tooth model processing device, which is provided with a drill for drilling and a plurality of drills for grooving, and wherein the tip portions of the plurality of drills for grooving are oblique from a horizontal plane which intersects the drill for drilling at a right angle. It is characterized by being arranged to protrude.

According to such a gypsum tooth model processing apparatus, the pin is inserted into the flat bottom surface of the gypsum tooth model with a drill for drilling only by pressing the flat bottom of the gypsum tooth model once toward the drill. And a groove can be formed around the hole with a drill for groove cutting.

According to a second aspect of the present invention, in the gypsum tooth model processing apparatus according to the first aspect, a table on which the gypsum tooth model is placed so that the flat bottom surface is in contact with the table is slidable in the vertical direction. A guide member for guiding, a spring for pushing the table upward, a stopper member for setting a stop position when the table is pushed down against the pushing of the spring, and a tip portion for pushing the table down to a predetermined position. Drill for drilling arranged at the lower part of the table so that it protrudes vertically from the table surface, and an optical marker attached to the upper part of the table so as to face the tip of the drill for drilling and irradiating a light beam And, when the table is pushed down to a predetermined position, it is arranged at the lower part of the table so that the tip end projects obliquely from the table surface. A plurality of grooving drill, characterized in that configured in capital.

According to such a gypsum tooth model processing apparatus, the gypsum tooth model is positioned so that a light beam is applied to the affected tooth portion of the gypsum tooth model, and the table is regulated by the stopper member on the flat bottom surface. By pressing down to the stop position, a hole can be made in the flat bottom surface of the tooth portion of the affected part in one step, and at the same time, a cut groove having a predetermined depth can be formed around the hole. The depths of these holes and kerfs are uniquely determined by the stop positions regulated by the stopper members, and there is no individual difference among operators, and a constant and stable processing quality is always obtained.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a principle configuration diagram of a gypsum tooth model processing apparatus according to the present invention.

In FIG. 1, a gypsum tooth model 2, which is an object to be processed, is placed on a table 1 such that a flat bottom surface abuts. The table 1 is slidably guided in a vertical direction along a guide shaft 3 and a support shaft 4
Is pushed upwards by the elastic force of the spring 5 wound around. The table 1 is horizontally supported by two support shafts around which a guide shaft 3 and a spring are wound, but FIG. 1 shows only a combination of a single support shaft 4 and a spring 5 and other combinations. The combination of the support shaft and the spring is not shown.

A stepped portion 6 is formed on the guide shaft 3, and the stepped portion 6 functions as a stopper for setting a stop position when the table 1 is pressed down against the spring 5 being pushed up.

When the bottom of the gypsum tooth model 2 reaches the position shown by the broken line A when the table 1 is pushed down to a predetermined position set by the stopper, the tip of the drill 7 is perpendicular to the table surface. It is arranged at the lower part of the table 1 so as to project therefrom.

The light marker 8 irradiates the gypsum tooth model 2 with a light beam, and is mounted on the upper portion of the table 1 so as to face the tip of the drill 7.
As the optical marker 8, a light emitting diode, a semiconductor laser, or the like is used.

In the lower portion of the table 1, three groove cutting drills 9 to 11 are arranged at equal angular intervals of 120 degrees in a horizontal plane with the drill 7 as a center. Two of the grooving drills 9 and 10 are such that when the table 1 is pushed down to a predetermined position set by the stopper 6, each tip portion is oblique to the table surface (in the embodiment, the table surface is inclined with respect to the table surface). Angle is about 30 degrees)
, And the other one of the grooving drills 11 is arranged such that the tip portion is parallel to the table surface. The two grooving drills 9 and 10 are adjusted so that one of them contacts the bottom surface of the gypsum tooth model 2 before the other.

The table 1 is provided with cutouts for passing the tip portions of the drill 7 for drilling and the drills 9-11 for groove cutting, but they are not shown.

The drill 7 for drilling and the drills 9 to 11 for grooving may be driven to rotate by compressed air or may be driven by an electric motor.

FIG. 2 is an explanatory view of the processing of the gypsum tooth model 2, showing a case where the affected part B is cut out from the gypsum tooth model 2. As shown in FIG. That is, the gypsum tooth model 2 is positioned on the table 1 so that the light beam of the optical marker 8 irradiates the affected part B of the gypsum tooth model 2, and the table 1 is set in the same position as the predetermined position set by the stopper 6. It shows a state in which it is pushed down to the position.

Thus, in one step of pushing down the table 1 to a predetermined position set by the stopper 6, as shown in FIG. 3, a hole is formed on the bottom surface of the affected part B cut out from the plaster tooth model 2. A hole 12 for inserting and fixing a pin in the vertical direction is formed by the drill 7, and the cut grooves 13 and 14 are cut by the groove cutting drills 9 and 10.

According to the results of work performed by the prototype machine, the average work time required for processing one plaster tooth model can be reduced to about 1/3 as compared with the conventional processing work, and the finished product by a plurality of workers can be finished. There were no individual differences in the condition.

FIG. 4 is also an explanatory view of processing the plaster tooth model 2, showing an example of the bottom surface before the affected part is cut off. A plurality of holes 12 for inserting and fixing pins are formed on the bottom surface, and three cutting grooves 13 to 15 are formed at equal angular intervals of 120 degrees by groove cutting drills 9 to 11 around each hole 12.
Is cut.

Here, these holes 12 and kerfs 13 to 15 are used.
The relative positional relationship between the drill 7 for drilling and the drill 9 for grooving
11 are uniquely determined based on the relative positional relationship with the data No. to No. 11. There is no individual difference among the workers, and a constant and stable processing quality can always be obtained.

In order to separate the affected part B from the actual plaster cast 2, the pin is inserted into each of the holes 12 and the bottom surface of the entire plaster cast is pressed against plaster for molding in the same manner as in the conventional process. After forming the support die, the cutting is performed using a tool such as a cutter with the cut groove 15 cut from the edge as a guide line.

The rotation of the plaster tooth model 2 itself due to the rotation of the drill can be prevented by making the rotation directions of the groove cutting drills 9 and 10 different from each other.

In addition, by providing a hose or a pipe directly connected to a pump for sucking gypsum powder accompanying drilling or grooving near the tip of the drill, the periphery of the work table can be maintained clean.

In addition to a drill for drilling and a drill for grooving, a rotary flat grindstone for flattening the bottom surface of a gypsum tooth model or a rotary cylindrical grindstone for shaving unnecessary portions facing a palate of a gypsum tooth model are provided. By incorporating it, most of the processing for the plaster tooth model can be performed by one device, and the working efficiency can be further improved.

[0029]

As described above, according to the present invention,
Special technology is not required for operation, and a gypsum tooth model processing device that can simultaneously perform “piercing” and “grooving” with a stable processing quality by one device can be realized, and labor saving and work training by shortening the working time can be realized. Practical effects such as an increase in productivity due to the elimination of the need are significant.

[Brief description of the drawings]

FIG. 1 is a principle configuration diagram of a gypsum tooth model processing apparatus according to the present invention.

FIG. 2 is an explanatory view of processing of a plaster tooth model 2 by the apparatus of the present invention.

FIG. 3 is an explanatory view of processing of an affected part of the gypsum tooth model 2 by the apparatus of the present invention.

FIG. 4 is an explanatory view of the bottom surface processing of the plaster tooth model 2 by the apparatus of the present invention.

FIG. 5 is an explanatory view of a bottom surface processing of the conventional plaster tooth model 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Table 2 Gypsum tooth model 3 Guide shaft 4 Support shaft 5 Spring 6 Stepped part 7 Drill for drilling 8 Optical marker 9-11 Drill for grooving 12 Hole 13-15 Cutting groove

Claims (2)

[Claims] A gypsum tooth model machining apparatus for providing a hole for inserting and fixing a pin on a flat bottom surface of a gypsum tooth model and forming a kerf around the hole, comprising: a drill for piercing and a grooving machine. A plurality of drills for drilling, and a plurality of drills for grooving are arranged so that tips of the drills project obliquely from a horizontal plane which intersects the drill for drilling at right angles. 2. A gypsum tooth model processing apparatus according to claim 1, wherein: a table on which the gypsum tooth model is placed so that the flat bottom surface abuts; and a guide member for slidably guiding the table in a vertical direction. A spring that pushes the table upward, a stopper member that sets a stop position when the table is pressed down against the push-up of the spring, and a distal end perpendicular to the table surface when the table is pushed down to a predetermined position. A drill for drilling arranged at the lower part of the table so as to protrude in the direction, an optical marker attached to the upper part of the table so as to face the tip of the drill, and for irradiating a light beam; Multiple groove cuts located at the bottom of the table so that the tip protrudes obliquely from the table surface when pressed down Use a drill, city by being configured with plaster dental cast processing apparatus according to claim.