JP3829004B2 - Articulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an articulator that is used for processing and forming a crown restoration or a denture, and in particular, for occlusal adjustment between a gypsum dentition model mounted on a lower jaw frame and a gypsum dentition model mounted on an upper jaw frame, The upper jaw frame can be moved not only backward but also forward so that different occlusal movements for each patient can be approximated as much as possible, improving work efficiency and easily performing high-precision occlusal adjustment. It relates to an articulator that can.
[0002]
[Prior art]
Conventionally, a gypsum dentition model used for processing and forming dental restorations, dentures, etc. is formed by pouring fluid gypsum into the impression of the upper or lower jaw of a patient and including the treatment tooth part of the patient. And the gypsum dentition model which opposes this is detachably fixed to the lower jaw and upper jaw frame of a pair of articulators.
[0003]
And when actually carrying out the processing of the crown restoration, denture, first check the occlusal state of the current upper and lower gypsum dentition model, then cut the plaster dentition part of the treatment tooth part with a precision saw, Occlusal with a gypsum dentition model that includes the treated dental part with the crown or denture of the required restoration applied to the gypsum dentition part of the detached treatment tooth part In general, a method of repeatedly performing correction and processing on the treatment tooth site as appropriate is employed so that the best condition is achieved.
[0004]
However, in the conventional articulator used for the occlusal adjustment as described above, the upper jaw frame on which the upper plaster model is mounted is moved up and down through the rotation shaft with respect to the lower jaw frame on which the lower plaster model is mounted. Since it is configured to be freely movable, when biting food, it cannot be adapted to complicated occlusal movements that include the forward and backward movements of the lower jaw slightly different for each patient.
[0005]
Therefore, in recent years, a configuration has been proposed in which a rotation shaft that supports the upper jaw frame can be freely moved with respect to the lower jaw frame so as to approximate the actual occlusal movement of the patient. Since the rotation axis is moved only backward, that is, only to move the upper jaw frame backward relative to the lower jaw frame, if it is necessary to move the upper jaw frame forward, the upper jaw side Correction of the restoration of dental crowns and dentures using an articulator. In addition, it has a drawback that observation is very troublesome.
[0006]
[Problems to be solved by the present invention]
The present invention was devised in the course of research and development aimed at improving the function and workability of the articulator in view of the actual situation as described above, and the object is to rotate the upper jaw frame. Although the shaft can be freely moved with respect to the lower jaw frame, even when the upper jaw frame needs to be moved forward, it is necessary to move the upper jaw plaster model forward. It is intended to provide an articulator capable of easily and flexibly moving the upper jaw frame forward, minimizing the burden on the operator, and improving work efficiency and maintaining high accuracy. .
[0007]
[Means for Solving the Problems]
In order to solve the problems, the technical means adopted by the present invention is that a pair of support columns are vertically provided on the rear end of the lower jaw frame on which the gypsum dental model on the lower jaw side is detachably mounted, Between the support surface inclined to the rear from the back side of each column and the recessed groove provided in the side part of each column In each of the articulators configured to be supported by a support member, a supporting member that presses the rotating shaft toward the concave groove side is attached to each column, and the backward movement of the rotating shaft along the support surface is flexed. An adjustment pin that allows against the urging force of the holding member and that has an insertion surface of the rotating shaft recessed in the outer peripheral direction passes through the concave groove from the top of the column and is inserted perpendicularly, and the adjustment pin When the fitting surface of this is aligned with the concave groove, it is possible to move the rotating shaft entering this forward. The one in which the features.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described in detail based on an embodiment shown in the drawings.
1 and 2, reference numeral 1 denotes an articulator for detachably mounting upper and lower gypsum dentition models 2, 3. The articulator 1 is a mandibular frame used also as a support for the lower gypsum dentition model 3. 4, a pair of support columns 5 and 6 are provided upright and spaced apart from each other, and a connecting frame 7 extending rearward is integrally stretched between the support columns 5 and 6, and in the vicinity of the top of each of the support columns 5 and 6. Each side surface portion is provided with a concave groove 8, and a pivot shaft 10 that pivotally supports the rear end side of the upper jaw frame 9 is fitted into the concave grooves 8, 8 so that the upper jaw frame 9 can be pivoted up and down. An articulator 1 is configured.
[0009]
Between the connection frame 7 and the back side of each column 5, 6, forward inclined support surfaces 7 a, 7 a are obliquely arranged, and the pivot shaft 10 of the upper jaw frame 9 fitted in the concave grooves 8, 8. Can be moved rearward along the bearing surface 7a, and the rotating shaft 10 is pressed to a reference fixed position in the concave grooves 8 and 8 by a biasing force of the holding members 11 and 11 described later. Yes.
[0010]
A mounting base 12 is removably screwed with a thumbscrew 13 on the lower surface of the upper jaw frame 9, and the gypsum dentition model 2 is fixed to the lower surface of the mounting base 12 via a fixing plaster 14. The occlusal adjustment is performed by moving the dentition model 2 up and down together with the upper jaw frame 9.
[0011]
Reference numeral 15 denotes an insial guide pin that supports the rotational front end side of the upper jaw frame 9 between the lower jaw frame 4 and reference numeral 15 a denotes an elastic receiving plate for the insisal guide pin 15 provided at the front end of the lower jaw frame 4. Reference numeral 16 denotes an adjustment knob that is screwed in the center of the connecting frame 7 to adjust the lower limit position of the upper jaw frame 9, and 17 is a manganese aluminum magnet embedded in the upper surface of the upper jaw frame 9, which fixes the gypsum dental model 2. When the attachment base 12 is attached to the upper jaw frame 9, as shown in FIG. 3, the upper jaw frame 9 is securely attached to the adjustment knob 16 by magnetizing the upper surface of the upper jaw frame 9 via the manganese aluminum magnet 17. It can be fixed in an open state, and the upper jaw frame 9 will not be inadvertently rotated to cause a mechanical impact, so that the accuracy and damage of the articulator 1 can be prevented.
[0012]
On the other hand, as shown in FIG. 4A, the elastic holding members 11 and 11 are formed by fixing the base ends of the leaf springs 18 and 18 to the side surfaces of the columns 5 and 6 with set screws 19, respectively. The abutment bodies 20, 20 projecting from the groove 8 are inserted into the grooves 8, 8, and both end portions of the rotating shaft 10 fitted in the grooves 8, 8 are pressed, whereby the respective bearing surfaces 7 a, 7 a are pressed. Is configured to allow the rearward movement of the rotary shaft 10 against the biasing force of the holding members 11, 11, and the insertion surface 21 a of the rotary shaft 10 is recessed in the outer circumferential direction. The adjustment pin 21 (shown in FIG. 5 (a)) is inserted perpendicularly through the concave grooves 8 and 8 from the tops of the columns 5 and 6, as shown in FIG. 4 (b). When the knob 22 provided on the head of the adjustment pin 21 is rotated so that the insertion surface 21a is matched with the concave groove 8, the insertion surface 21a is entered. It has a configuration which enables forward movement of the pivot shaft 10.
[0013]
Since the present invention is configured as described above, when processing and molding a treatment tooth portion using a gypsum dentition model, first, the gypsum dentition model 3 on the lower jaw side is fixed on the lower jaw frame 4. In addition, the upper plaster dental model 2 fixed to the fixing plaster 14 in advance is fixed to the upper jaw frame 9 via the mounting base 12. Next, after confirming the occlusal state of the current upper and lower gypsum dentition models 2 and 3, the gypsum dentition part of the treatment tooth part is subjected to necessary cutting, processing, restoration crowning, denture formation, etc. The correction and processing of the treatment tooth site should be repeated as appropriate using the articulator 1 so that the occlusion of the plaster dental model including the mounted treatment tooth site and the gypsum model facing the best state is achieved. become.
[0014]
In the occlusal adjustment work by the articulator 1, when the upper jaw frame 9 is moved relative to the lower jaw frame 4, the operator holds the entire upper jaw frame 9 and shifts it backward while rotating up and down. Then, the rotating shaft 10 held in the concave grooves 8 and 8 at the standard fixed position resists the urging force of the elastic members 11 and 11 and moves away from or away from the concave grooves 8 to the support surfaces 7a and 7a. The rearward movement is performed, and the treatment tooth site is corrected, the processing is confirmed, and the upper and lower occlusal states are observed.
[0015]
Further, when it is necessary to move the upper jaw frame 9 forward relative to the lower jaw frame 4, the rotating shaft 10 is held in the concave grooves 8 and 8 at the reference fixed positions by the urging force of the elastic holding members 11 and 11. In this state (FIG. 4A), when the operator rotates the knob 22 of the adjustment pin 21 and the insertion surface 21a matches the concave groove 8, the rotation pressed by the elastic members 11 and 11 is performed. The shaft 10 enters the insertion surface 21a, and the upper jaw frame 9 is relatively moved forward.
[0016]
Therefore, it is possible to easily perform occlusal adjustment that approximates as much as possible the complicated occlusal movement including the forward and backward movement of the lower jaw, which is slightly different for each patient who bites the food, without carrying out the cumbersome plaster model. It is possible to continue the correction and observation for the restoration of the crown and the denture using the articulator efficiently and smoothly.
[0017]
FIGS. 5B to 5E show other embodiments of the adjusting pin 21. FIGS. 5B and 5C show the rotation axis by changing the shape of the fitting surface to 21b and 21c. 10 shows a configuration in which the amount of forward movement is changed, and by preparing a plurality of adjustment pins 21 of such different insertion surfaces 21a to 21c, it is possible to perform fine occlusion adjustment. FIG. 6 (d) shows that the fitting surfaces 21a to 21c of the above (a) to (c) are formed on a single adjustment pin 21 'having a screw configuration. In this case, the adjustment pin 21' Are screwed in from the tops of the columns 5 and 6 and the respective fitting surfaces are matched with the concave grooves 8 by adjusting the size of the screw advancement and retraction, so that the amount of forward movement of the rotary shaft 10 can be reduced without requiring adjustment pin replacement. A wide range can be secured. Further, in FIG. 5E, a tapered insertion surface portion 21d is integrally formed on the adjustment pin 21 ″ having the screw configuration shown in FIG. 4D, and the rotation shaft 10 is moved forward and backward by adjusting the size of the screw. The amount of movement can be adjusted more finely.
[0018]
Further, in this embodiment, the base ends of the leaf springs 18 and 18 are fixed to the side surfaces of the support columns 5 and 6 with set screws 19, and the contact bodies 20 and 20 projecting from the tip ends of the contact springs 20 and 20 Although shown in FIG. 6 and FIG. 7 without being limited to this, the holding members 11 and 11 of the structure which presses the both ends of the rotating shaft 10 inserted into the concave grooves 8 and 8 are shown. Thus, the pressing pins 24, 24 are inserted into the holders 23, 23 formed in a U-shape so as to be able to advance and retreat, and the holders 23, 23 are fixed on the bearing surfaces 7a, 7a. Is pressed against the rotary shaft 10 by the compression coil rams 25, 25, or the base ends of the plate springs 26, 26 bent in a folded shape are fixed on the bearing surfaces 7a, 7a and protruded from the distal ends thereof. The abutting bodies 27 and 27 may be pressed against the rotating shaft 10.
[0019]
【The invention's effect】
In short, in the present invention, a pair of support pillars are erected on the rear end of the lower jaw frame for detachably mounting the lower jaw side plaster model, and the upper side plaster model is detachable. An articulator configured to support the rotation axis of the upper jaw frame to be mounted between a support surface obliquely provided rearward from the back side of each column and a concave groove provided in a side surface portion of each column. In each of the above, a supporting member that presses the rotating shaft toward the concave groove is attached to each column, and the backward movement of the rotating shaft along the bearing surface is resisted against the biasing force of the supporting member. The adjusting pin having the insertion surface of the rotating shaft recessed in the outer circumferential direction is inserted through the concave groove from the top of the column in an orthogonal manner so that the insertion surface of the adjusting pin is aligned with the concave groove. The pivot shaft that enters this can be moved forward, so that the upper jaw frame is pivotally supported. Although the movement axis can be freely moved with respect to the lower jaw frame, even when the upper jaw frame needs to be moved forward, an operation of shifting the upper plaster model is required. Therefore, it is possible to easily and flexibly move the upper jaw frame forward, minimizing the burden on the operator, improving work efficiency and maintaining high accuracy, and mounting a troublesome plaster dental model. It is possible to easily adjust the occlusion as close as possible to the complicated occlusal movement including the forward and backward movement of the lower jaw, which is slightly different for each patient who bites the food, without using the occlusion machine. This presents a very useful novel effect that the correction and observation for the restoration of the crown restoration and the denture can be efficiently and smoothly continued.
[Brief description of the drawings]
FIG. 1A is an overall side view of an articulator.
(B) is a plan view of the same.
FIG. 2A is a side view of a lower jaw frame including struts.
(B) is a plan view of the same.
FIG. 3 is an overall side view showing the articulator with the upper jaw frame fully open.
4A is an enlarged partial cross-sectional view of a main part showing a pressing state of a rotation shaft and a holding member at a reference fixed position. FIG.
(B) is a principal part expansion partial sectional view which shows the state which the ditch | groove and the insertion surface corresponded by rotation of the adjustment pin.
FIG. 5A is an overall side view of an adjustment pin.
(B) is the whole side view of the adjustment pin which changed the insertion surface.
(C) is the whole side view of the adjustment pin which changed the insertion surface.
(D) is an overall side view of an adjustment pin having a plurality of different insertion surfaces recessed.
(E) is the whole side view of the adjustment pin which formed the insertion surface in the taper shape.
FIG. 6A is an overall side view of an articulator that employs a holding member having another configuration.
(B) is a plan view of the same.
FIG. 7A is an overall side view of an articulator employing a holding member having another configuration.
(B) is a plan view of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Articulator 2 Upper gypsum dentition model 3 Lower gypsum dentition model 4 Mandibular frame 5 Support column 6 Support column 7a Bearing surface 8 Groove 9 Upper jaw frame 10 Rotating shaft 11 Retaining member 21 Adjustment pin 21a Insertion surface

Claims (1)

A pair of struts are erected on the rear end of the lower jaw frame to detachably mount the lower plaster model, and the upper frame rotates to mount the upper plaster model detachably. In an articulator configured to support a shaft between a support surface obliquely provided rearward from the back side of each column and a concave groove provided in a side surface portion of each column, the rotation shaft is A supporting member that presses toward the concave groove side is attached to each column, and the rearward movement of the rotating shaft along the bearing surface is allowed against the biasing force of the supporting member. An adjustment pin having a recessed surface in the outer circumferential direction is inserted through the groove from the top of the column in an orthogonal manner, and the adjustment pin is inserted when the insertion surface of the adjustment pin is aligned with the groove. An articulator capable of moving the rotating shaft forward.

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