JPH0336332Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an articulator that determines the occlusal state of dentures.

(Prior art) Articulators are designed to examine the occlusal state of dentures by rotating the upper frame around the condylar axis. Suitable. However, since clenching the teeth involves vertical movement of the lower jaw, it has not been possible to reproduce this with conventional articulators.

(Technical Problem) The purpose of the present invention is to solve the above-mentioned problems and provide an articulator that can correctly reproduce the occlusal contact relationship at the cusp engagement position by making the model attachment plate movable up and down. There is a particular thing.

(Technical means) The purpose is to provide a model attachment plate 2 attached to the upper frame 1
, a main guide shaft 3 and one or more sub guide shafts 4
By protruding upward and forming shaft holes 5 and 6 through the upper frame 1 into which the respective guide shafts 3 and 4 are slidably fitted, vertical movement relative to the upper frame 1 is achieved. This is achieved by a structure in which the model attachment plate 2 is capable of linear movement and is further provided with a tightening screw 7 that engages with its main guide shaft 3 to fix the model attachment plate 2 to the upper frame 1.

(Operation of the device) The method of examining the occlusal surface using a check bite using the articulator having the above-mentioned configuration is the same as that using a general articulator, and is easier and more accurate. Generally, with an articulator, if the check bite at the central occlusal position is removed and the model is brought into occlusal contact,
It can be seen that a gap is created in the molar region. In other words, during habitual closure, when the distance between the occlusal surfaces approaches 1 mm, the mandible undergoes a linear movement that moves approximately perpendicular to the occlusal plane due to rotational movement around the condylar axis. The position changes and the intercuspial position is reached. Normally, the check bite has a uniform thickness on both the anterior and posterior teeth, and when the check bite is removed, the occlusal gap between the upper and lower models becomes uniform from front to back, and from this state the occlusion is adjusted so that all teeth can make contact. Upper frame of the vessel 1
It is not possible to move the condyle using conventional rotational movement around the condylar axis 12. However, in the articulator according to the present invention, the model attachment plate 2 is movable in the vertical direction with respect to the upper frame 1, and performs linear movement approximately perpendicular to the occlusal plane, so the occlusal contact relationship at the central occlusal position is occlusal. This will ensure accurate reproduction on the instrument.

(Example) To explain with the illustrated example, the upper frame 1 is the lower frame 1.
It is mounted so as to be rotatable around a condyle shaft 12 supported by left and right columns 11 of 0. Upper frame 1
A model attachment plate 2 is attached to the lower surface of the device, and the model attachment plate 2 of this invention has a main guide shaft 3 that protrudes upward.
and two auxiliary guide shafts 4 arranged in front and rear thereof, each guide shaft 3, 4, 4 is fitted into a shaft hole 5, 6, 6 formed in the upper frame 1, And it is in a state where it can move up and down. The main guide shaft 3 is attached to the upper frame 1.
A hole 13 is formed which intersects the side surface of the hole 1.
3 is moved and its engaging portion 7a tightens the main guide shaft 3, thereby fixing the model attachment plate 2. 7b indicates the operating nut of the fastening screw 7. Each guide shaft 3, 4, 4 is slidably fitted into each shaft hole 5, 6, 6 of the upper frame from above, and is screwed onto the upper surface of the model attaching plate 2. A lower plate 14 stacked on the lower surface of the model attachment plate 2 can be attached and detached using attachment/detachment screws 15.

In each figure, 16 is a lower model attachment plate detachably attached to the upper surface of the lower frame 10, 17 is its mounting screw, 1
Reference numeral 8 indicates the condylar bulb which is slidably inserted into the condylar shaft 12, 19 indicates the condylar disc having a condylar channel 20 which the condylar bulb 18 engages with in a forward and backward manner, and 21 indicates the amount of rotation thereof, that is, the sagittal condyle. A scale indicating the road slope angle, 22 is a fixing screw, 23,
24 is the anteroposterior adjusting screw and fixing screw of the condylar bulb, 2
Reference numeral 5 denotes a rail on which the sliding portion of the column 11 is mounted, and the column 11 can be moved from side to side via a pinion 27 and a rack 28 using an intercondylar distance adjusting screw 26, and can be fixed at any position using a stator 26A. . In addition, the support 11 is rotated around a vertical axis,
Moreover, by loosening the tightener 11A, it can be fixed at any rotation angle. 29 is the lateral condylar path inclination angle scale; 30 is the incisor pin suspended from the front end of the upper frame; 31
indicates the incisal road plate.

Reference numerals 32 and 32' indicate internal and external stoppers attached to the condylar shaft 12. The medial stopper 32 is the condylar axis 12
It is inserted into the condylar roadbed 19 and placed inside the condylar roadbed 19, and is used to obtain a lateral check bite and to maintain the central occlusal position when moving the post 11 from side to side.
The outer stoppers 32 are disposed outside the condyle roadbed 19 to enable movement to the backward position, and each inner cylinder 3
3, an outer cylinder 34 screwed thereto, and a fixing screw 35. Furthermore, the outer stopper 32' is provided with scales 36 and 37 indicating the amount of movement of the outer cylinder.

With the above configuration, the movement path from the central occlusal position, which is the final position of habitual mouth closing movement, to the retracted position can be easily and accurately reproduced. That is, in order to reproduce the retraction position, the outer stoppers 32' are inserted from both sides of the condylar axis 12 in the central occlusal position, brought into contact with the condylar bulb 18, and fixed in that position, and the inner stoppers 32' are loosened. , adjust the condylar disc 19 to the previously read sagittal condyle tract angle, move the scale of the center clock 38 by the amount of retraction, and then read the outer cylinder 34 of the outer topper 32' first. Move it inward by the amount of the gap and fix it in that position,
The left and right condylar balls 18, 18 are moved to the retracted position, and in this state, the inner stopper 32 is brought into contact with the condylar ball 18 and fixed, and finally the outer stopper 32' is brought into contact with the condylar ball 18 and fixed. Just do it. The above movement is characterized by the reproduction from the central occlusal position to the retracted position, which was structurally impossible with conventional articulators.

(Effect of the invention) Therefore, according to the invention, the model attachment plate 2 is attached to the upper frame 1.
Since the structure is movable up and down, it is possible to accurately reproduce the movement of the lower jaw even in the final stage of occlusion, and the retraction position can be more faithfully and easily reproduced than with conventional articulators. produces unexpected effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the articulator according to the present invention, with FIG. 1 being a vertical cross-sectional view and FIG. 2 being a partially cutaway plan view. 1... Upper frame, 2... Model attachment plate, 3... Main guide shaft, 4... Sub-guide shaft, 5, 6... Shaft hole, 7...
...Tightening screw.

Claims (1)

[Scope of utility model registration request] A main guide shaft 3 and one or more sub-guide shafts 4 are provided upwardly projecting on a model attachment plate 2 mounted on an upper frame 1, and each of the guide shafts 3 and 4 is slidably fitted into the shaft. By forming the holes 5 and 6 through the upper frame 1, the model attaching plate 2 is capable of linear movement in the vertical direction relative to the upper frame 1, and furthermore, it is engaged with the main guide shaft 3 to attach the model. An articulator comprising a fastening screw 7 for fixing an attachment plate 2 to an upper frame 1.