JPH0216735Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an incisor guide plate in a dental articulator.

(Prior art and its problems) Conventionally, dental articulators (hereinafter referred to as articulators)
In general, as shown in FIG. 5, the mandibular frame generally consists of a mandibular frame 1, a maxillary frame 3, an incisal table 2, and an incisal pole 4. A pair of condylar balls 5 are provided on the left and right sides of the uppermost part of the maxillary frame 3, and the maxillary frame 3 abuts against the inner lower surface of a pair of glenoid fossae 6 provided on both left and right sides of the uppermost part of the maxillary frame 3. It's becoming like that. Further, the incisor guide plate 2 is removably provided at the tip of the lower jaw frame 1, and the incisor guide nail 4 is provided at the tip of the upper jaw frame 3.

As shown in FIG. 9, the incisor guide plate 2 has a central groove part 7 provided so that the center line faces in the front-back direction, and left and right wing parts (flaps) bent upward at both edges of the central groove part 7. 8, 8, and the sagittal inclination angle θ of the central groove portion 7 and the tilt angle ψ of the left and right wing portions 8
By adjusting the patient's incisor path (the guide obtained by the contact and sliding between the lingual surface of the maxillary anterior teeth and the incisal edge of the mandibular anterior teeth), we empirically adjusted the patient's incisor path (the guide obtained by the contact and sliding between the lingual surface of the maxillary anterior teeth and the incisal edge of the mandibular anterior teeth) based on data obtained from check bites. I'm starting to do that.

Depending on the type of articulator, the incisor guidance board 2
Some have Gossick arch support plates on top.

The articulator having the above structure reproduces mandibular movement by mounting tooth models on the upper and lower jaw frames 3 and 1 and sliding the tip of the incisor guide nail 4 on the incisor guide plate 2. ing. In other words, the incisor guide nail 4 serves as a mandibular anterior tooth, and also has the function of holding the upper and mandibular frames 3, 1 horizontally.

By the way, for example, the process of mounting a dental model on an articulator using the well-known face bow, the process of adjusting the occlusal state of the upper and lower teeth at the centric position, or the process of adjusting the occlusal state of the upper and lower teeth at the centric position, or the process of adjusting the occlusal state of the upper and lower teeth at the centric position, or when there is no missing front tooth and the front tooth alignment is abnormal. In cases where the incisor guide plate 2 is not available, removing the incisor guide plate 2 from the articulator main body makes prosthetic work easier. The incisor guidance board 2
is generally configured to be detachable from the mandibular frame 1.

However, due to manufacturing errors or fitting precision between the articulator body and the incisor guide plate 2, when the incisor guide plate 2 is attached to the mandibular frame 1, the tips of the incisor guide nails 4 may be attached to the incisor guide plate 2. It deviates slightly from the upper position to the front and back, and to the left and right. With this deviation,
The incisor path guide function of the incisor guide plate 2 becomes out of order,
Precise prosthetics cannot be manufactured. In particular, even a lateral deviation of about 0.2 mm can cause problems.

Note that some articulators have been considered in which the tip of the incisor guide nail 4 is replaceable, but with such an articulator, the possibility of the deviation occurring is further increased.

However, conventional incisor guide plates do not have an adjustment mechanism that can easily correct the minute deviations mentioned above, and have various obstacles in manufacturing precise prostheses. Ta.

Therefore, in the present invention, the incisor guide plate has a fine adjustment mechanism, and when it is attached to the mandibular frame,
It is an object of the present invention to provide an incisor guide plate that allows fine adjustment of the incisor guide section laterally or front and back.

(Means to Solve the Problems) In order to achieve the above-mentioned purpose, the incisor guide plate according to the present invention has a base part attached to the tip of the mandibular frame of the articulator, and an intermediate part located on the base part. It consists of a block and a guide part located on the intermediate block and equipped with an incisor guide part on the upper surface, and the intermediate block is moved forward and backward or left and right with respect to the base, and the guide part is moved left and right or front and back with respect to the base. The intermediate block and the guide part are fitted and mounted so as to be movable in the respective directions, and the intermediate block and the guide part are integrated with the base part by a fixing means.

(Example) Next, the present invention will be explained with reference to the drawings which are one example.

FIG. 1 shows an incisor guide plate 2 according to the present invention, and roughly shows a mandibular frame 1 as shown in FIG.
A guide part 2 having a stand part 11 attached to the tip of the guide part 11, an intermediate block 17, and an incisor guide part 27.
Consists of 1.

The base part 11 has mounting parts 12 which are provided on both sides of the upper part and which are opposite to each other in the longitudinal direction and have a U-shaped cross section and which fit into a fork-shaped mounting part (not shown) provided at the tip of the mandibular frame 1. A rectangular groove 1 is provided in the center of the upper surface, into which the intermediate block 17 is slidably fitted in the front-rear direction.
3, the groove 14 located on the back side has long holes 15a in the longitudinal direction on both sides, a rectangular groove 15b in the middle, and a screw hole 16 for attaching the lower jaw frame 1 on the outside of the groove 14. (See Figure 3).

The intermediate block 17 has a rectangular groove 18 perpendicular to the rectangular groove 13 in the upper center thereof, a long hole 19 in the center of the rectangular groove 18, and screw holes 20 on both sides of the intermediate block 17. It is provided.

The guide portion 21 has a protrusion portion 22 at its lower part that is slidably fitted into the rectangular groove 18 of the intermediate block 17 and has a screw hole 23 at its center, and a guide wall 24 at the rear of the upper surface. 24, and between the guide walls 24, an incisor guide section 27 shown in FIG. 5 is attached.

The incisor guide section 27 has a semicircular guide plate 28 having an arcuate groove 29 on one side, and a shaft with fixing screws 31 on both sides of the guide plate 28 so that the wing parts 8, 8 can adjust the swing angle ψ. It is rotatably attached around 31.

Note that the upper surface of the guide plate 28 constitutes the central groove portion 7.

The incisor guide section 27 has its guide plate 28 positioned between the guide walls 24, and a pin 25 driven into the arcuate groove 29 from one guide wall 24.
and the fixing screw 26, and the sagittal inclination angle φ
is rotated within a range of 0° to 80° and fixed at a predetermined angle with a fixing screw 26.

In other words, the central groove portion 7 and the wing portions 8 constitute a conventional incisor guide plate. Note that 30 is a rotation angle scale of the guide plate 28, and 32, 32 are Gossick arch support plates that are movably attached to the wing portions 8, 8 with fixing screws 33.

The incisor guide plate 2 according to the present invention has the base portion 11
The intermediate block 17 is fitted into the rectangular groove 13 of the base part 11 into the screw hole 20 through the long holes 15a, 15a.
Screw the screw 34a through the slot 1 to the base 11.
5a so that it can be slid back and forth within a predetermined range.

Further, the protruding piece 22 of the incisor guide section 27 is fitted into the rectangular groove 18 of the intermediate block 17, and the rectangular hole 15 is fitted.
b. Screw the screw 34b from the base part 11 into the screw hole 23 through the long hole 19, and attach it to the base part 11 so as to be slidable left and right through the rectangular hole 15b and the long hole 19 to integrate the whole. It is something.

Therefore, the incisor guide plate 2 is now attached to the mandibular frame 1, and the screws 34c are inserted into the screw holes 16 of the base part 11.
If the incisor guide nail 4 is attached by tightening it from the center, the tip of the incisor guide nail 4 may be attached to the central groove 7 by the line segment P due to manufacturing errors, etc.
If the center position is deviated from the center position shown in FIG. Fine adjustment can be made very easily by tightening 34b.

In addition, as shown in FIG. 6, the incisor guiding nail 4
If the tip 4b is made of a material that can be cut, such as synthetic resin, the immediate side shift amount α calculated in advance by the patient is deleted, as shown in FIG.
It is also possible to make immediate side shift possible. In this case, the incisor guide nail 4 has a main body 4a made of a metal rod and a tip 4b made of synthetic resin, which are separate bodies, and the tip 4b can be attached and detached to a mounting part provided on the main body 4a with a fixing screw 17. This may facilitate the cutting operation of the distal end portion 4b, or various distal end portions 4b having different widths may be prepared in advance and selected as appropriate depending on the patient. 4c is a scale.

(Effects of the invention) As is clear from the above explanation, according to the incisor guidance board according to the present invention, the incisor guidance section formed on the upper surface can be finely adjusted in the front, back, left, and right directions, so that the incisor guidance can always be performed. The tip of the nail can be adjusted to the center of the incisor guidance part with a simple operation, and a precise prosthesis can be manufactured.

[Brief explanation of drawings]

FIG. 1 is a perspective view of the incisor guide plate according to the present invention;
Figure 2 is an exploded perspective view of the main parts of Figure 1, Figure 3 is a bottom view of Figure 1, and Figure 4 is a side view of the incisor guide plate in Figure 1 with the incisor guide section rotated. Figure 5 is a perspective view of the incisor guide section, Figure 6 is a diagram showing the relationship between the incisor guide plate and the incisor guide nail, Figure 7 is an explanatory diagram of the incisor guide nail, and Figure 8 is the conventional FIG. 9 is an explanatory diagram of the incisor guide plate of FIG. 8. 1 - Mandibular frame, 2 - Incisor guide plate, 3 - Upper jaw frame, 4 - Incisor guide nail, 8 - Wing part, 11 - Platform part, 13 - Rectangular groove, 15a - Long hole, 15b - Rectangular hole, 17 ~Middle block, 18~Rectangular hole, 19~
Long hole, 20 - screw hole, 21 - guide part, 22 - projecting piece part, 23 - screw hole, 24 - guide wall, 25 - pin, 26 - fixing screw, 27 - incisor guide part, 28 -
Guide plate, 29 ~ guide groove, 31 ~ fixing screw, 3
4a, 34b, 34c ~ bis.

Claims (1)

[Scope of utility model registration request] The articulator consists of a base part attached to the tip of the mandibular frame, an intermediate block located on the base part, and a guide part located on the intermediate block and equipped with an incisor guide part on the upper surface. The intermediate block is fitted and mounted so as to be movable back and forth or left and right with respect to the base, and the guide part is movable left and right or front and back with respect to the base, and the intermediate block and guide part are fixed to the base by a fixing means. An incisor guide plate in a dental articulator, characterized in that it is integrated.