JPH03191954A - Articulator - Google Patents

Abstract

PURPOSE:To simplify the structure and to eliminate the occulusal inferiority of underjaw teeth by mounting an upper arch on the shaking part arranged at the rear part of the lower arch in a state freely shakable left and right and freely movable before and behind and making the upper arch freely shakable up and down around the rotary shaft of the shaking part. CONSTITUTION:Upper and lower jaw models are mounted on an underjaw model mounting part 5 and an upperjaw model mounting part 9 so as to set the incisal point B of the upper and lower jaw models to the leading end of an incisor guidance post 13 and the upper arch is shaken up and down around a rotary shaft 14 to reproduce underjaw opening and closing motion, and the lower end part of an incisor guidance nail 12 is slid in the contact state with the V-shape trough part of an incisor guidance plate 8 and a slide part 19 allows the upper surface of a condyle path plate 16 to slide in forward and rearward directions and the upper arch 3 is allowed to advance and retract to reproduce underjaw forward and rearward motion. The lower end part of the incisor guidance nail 12 is slid in a state always in contact with the slope part of the upper surface becoming a V-shape of the incisor guidance plate 8 and the upper arch 3 is shaken left and right around shaking fulcrum parts 20, 20a to reproduce underjaw lateral motion and subsequently returned to the initial state by the recovery force of a leaf spring 17.

Description

[Detailed Description of the Invention] [Object of the Invention] The present invention relates to an articulator that moves as closely as possible to human mandibular movements.

Traditionally, occlusion used to create artificial objects to be placed in the mouth, such as prosthetics (crowns, pre-fujis, partial dentures, complete dentures, etc.), restorations (inlays, onlays, etc.), and templates. The articulator moves the upper arch up and down, back and forth, and swings left and right at positions corresponding to the condylar heads of the left and right sides of the mandible. Because the rotation axis of the upper arch is at the center of physiological mandibular movement, which does not exist in a position corresponding to the head, only dentures with malocclusion can be made, and the problem can be corrected by attaching the dentures in the patient's mouth. It has its drawbacks.

Furthermore, if a denture with a malocclusion is worn as is, stress will accumulate in the temporomandibular joint fossa and the muscles around the jaw, resulting in various physical symptoms.

Furthermore, although there are conventional articulators that can produce high-precision dentures, these fully articulated articulators have a very complex structure and are very troublesome to operate, so they are difficult to operate unless you are an expert. It had a defect that made it unusable.

a
In addition, by not setting the center of the vertical movement of the upper arch at a position corresponding to the condylar head, malocclusion of the upper and lower teeth is eliminated, and the adjustment work for denture defects in the patient's mouth after manufacture is minimized. The purpose is to provide an articulator that is easy to operate.

[Structure of the invention]

In order to solve the above-mentioned drawbacks, the present invention provides an upper arch on which a maxillary model is mounted oppositely placed above the upper arch on which a lower jaw model is mounted, and the upper arch is arranged at the rear of the lower arch. The present invention provides an articulator which is attached to a swinging part so as to be able to swing horizontally and back and forth, and whose upper arch is swingable up and down about a rotation axis provided in the swinging part, and the rotation axis is When placed at a position corresponding to the odontoid process of the second cervical vertebra, the vertical movement of the upper arch becomes closer to physiological mandibular movement.

Tachi-ri This invention reproduces the opening and closing movement of the mandible by moving the upper arch up and down around the rotation axis, reproduces the back and forth movement of the mandible by moving the upper arch back and forth, and then moves the upper arch left and right to reproduce the mandibular opening and closing movement. It reproduces the directional motion.

An embodiment of the present invention will be described based on the drawings. 1 is a main body of an articulator according to the present invention, and an upper arch 3 on which an upper jaw model is attached above an upper arch 2 on which a lower jaw model is attached. are arranged opposite to each other, and the upper bow 3 is arranged at the rear part of the upper bow 2.
The main body 1 is attached to the main body 1 so as to be able to swing up and down, left and right, and move back and forth.

First, the upper arch 2 will be described. Reference numeral 5 denotes a lower jaw model attachment part provided at the center of the upper arch 2. The lower jaw model attachment part 5 has a large-diameter lower jaw model attachment hole 6 extending through it, and the upper arch 2 A model maintenance rod 7 is inserted into and removed from the side so as to pass through the center of the lower jaw model attachment hole 6.

Reference numeral 8 denotes an incisor guide plate swingably disposed at the front end of the upper arch 2, and the incisor guide plate 8 has an upper surface shaped like a 7-shape.

Next, to explain the upper arch 3, reference numeral 9 is an maxillary model attachment part provided at the center of the upper arch 3. A model maintenance rod 1 is inserted and removed from the side of the bow 3 so as to pass through the center of the maxillary model attachment hole 10.

12 is an incisor guide nail that is disposed hanging down at the front end of the upper arch 3;
The incisor guide nail 12 has its apical end reduced in diameter and inserted into a mounting hole penetrated through the front end of the upper arch 3, and an incisor guide mark 13 is horizontally disposed therethrough at a predetermined position in the middle part. ing.

Next, the swinging unit 4 will be described. ] 4 is a rotation axis, and the rotation axis ] 4 is placed at a position corresponding to the tooth process of the second cervical vertebra of the human body, and is erected opposite to the rear of the upper arch 2. It is horizontally suspended between the supporting columns 15 and 15a.

Reference numeral 16 denotes a condylar road plate, which in an initial state is inclined at a reduced diameter angle with respect to the horizontal occlusal plane A set at a predetermined position in the middle of the main body 1, and has an arch on its rear upper surface. 18.18a is a bracket, and the lower end of the bracket 18.18a is attached to the rotation shaft 14. , the upper end is fixed to the back surface of the condylar road plate 16.

19 is a sliding part provided at the rear part of the upper bow 3;
9 is integrally formed by extending diagonally upward from the rear part of the superior arch 3, and the superior arch 3 is mounted on the condylar road plate 16 so that the rear part contacts both ends of the leaf spring 17. is vertically swingable, and the sliding portion 19 is movable back and forth on the condylar road plate 16, allowing the superior arch 3 to move back and forth.

Reference numeral 20.20a is a swinging fulcrum part that allows the upper bow 3 to swing left and right. Support rods 21.21a are provided on both sides of the sliding part 19, and a support needle 2 is provided inside the tip of the support rod 21.21a.
2.22a is provided in a protruding manner, and a support needle receiving portion 23.23a is provided on the upper surface of the condyle road plate 16 corresponding to the tip of the support needle 22.22a, thereby forming a swing fulcrum portion 20.20a. .

24.24a is an L-shaped stopper projecting from the upper front surface of the condyle road plate 16.

In this embodiment, the rotating shaft 14 is placed at a position corresponding to the tooth process of the second cervical vertebra, but it is not limited to this position, and for example, as shown in FIG. The rotating shaft 14 is arranged at the rear, or, as shown in FIG. In other words, the front part of the upper bow 3 is made to be able to swing up and down with respect to the sliding part 19. In other words, the rotation axis 14, which is the center of the vertical swing of the upper bow 3, and the back and forth movement and left and right swing of the upper bow 3 are Condylar tract #i, 1 centered on motion
6 and the sliding portion 19 may be provided separately.

Further, in this embodiment, the leaf spring 17 is formed into a bow shape, and both ends of the leaf spring 17 are brought into contact with the rear part of the sliding portion 9; however, the shape is not limited to this, and in short, the upper The bow 3 may be returned to its initial state after being moved back and forth and swung left and right.

Next, to explain the operation of the articulator according to the present invention, first, the lower jaw model attachment part 5 and the upper jaw model attachment part 9 are attached to the tip of the incisor guide 13 so as to be centered at the incisor point B of the upper and lower jaw models.
Attach the upper and lower jaw models to the
The lower end of the incisor guide nail 12 is slid up and down to reproduce the mandibular opening/closing movement, and the lower end of the incisor guide nail 12 is kept in constant contact with the trough on the upper surface of the incisor guide plate 8. Part 19
slides the upper surface of the condyle road plate 16 in the anteroposterior direction to advance and retreat the upper arch 3 to reproduce the mandibular anteroposterior movement, and also connects the lower end of the incisor guide nail 12 to the 7-shaped upper surface of the incisor guide plate 8. The swinging fulcrum part 20.2 is slid while always being in contact with the slope part.
Lateral movement of the lower jaw is reproduced by swinging the upper arch 3 left and right about 0a, and the restoring force of the leaf spring 7 returns to the initial state.

〔Effect of the invention〕

In short, the present invention provides an upper arch 3 on which an maxillary model is mounted above a lower 2 on which a mandibular model is mounted, and an upper arch 3 on which a maxillary model is mounted.
is attached to a swinging part 4 disposed at the rear of the upper bow 2 so as to be able to swing left and right and back and forth, so that the upper bow 3 can swing up and down about a rotating shaft 14 provided on the swinging part 4. By separating the rotary shaft 14, which is the center of the vertical swing of the upper arch 3, and the forward path plate 16 and the sliding part 19, which are the center of the back-and-forth and left-right swing of the upper arch 3, the condylar head can be adjusted. Compared to conventional articulators, in which the part corresponding to the upper arch forms the center of vertical and horizontal oscillation and back-and-forth movement, the structure is much simpler, and the operation is also much easier. In addition, by not setting the rotation axis 14, which is the center of the vertical swing of the upper arch 3, at a position corresponding to the condylar head, the vertical swing of the upper arch 4 is brought closer to the physiological mandibular opening/closing movement,
Therefore, it is possible to eliminate malocclusion of the upper and lower teeth, and to minimize the amount of work needed to adjust defects in prostheses, restorations, templates, etc. in the patient's mouth after they have been manufactured.

In addition, since the rotation axis 14 is placed at a position corresponding to the tooth process of the second cervical vertebra, the vertical movement of the upper arch 3 can be brought closer to the physiological opening/closing movement of the lower jaw, resulting in more accurate prostheses, restorations, and The practical effects are tremendous, such as being able to create a template and therefore reducing the amount of work required to correct defects in the patient's mouth after the template has been created.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a plan view of an articulator according to the present invention, FIG. 2 is a top side view of the articulator, and FIGS. 3 and 4 are views of other embodiments. FIG. 2 Lower bow 3 Upper bow 4 Swinging part 14 rotating wheels or more

Claims (2)

[Claims] (1) The upper arch on which the maxillary model is attached is placed oppositely above the lower arch on which the lower jaw model is attached, and the upper arch is attached to the swinging part arranged at the rear of the lower arch so that it can swing left and right and move back and forth. An articulator characterized in that the upper arch is swingable up and down about a rotating shaft provided in the swinging part. (2) The articulator according to claim 1, wherein the rotation axis is arranged at a position corresponding to the second cervical tooth process.