JPH0246885Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an improvement of an Alcon type semi-adjustable articulator.

[Conventional technology]

An articulator is a so-called human jaw simulating device devised for making dentures etc. outside the oral cavity.The unconventional semi-adjustable articulator has a condyle guide section on the maxillary model arch and a condylar bulb on the mandibular model arch. This is an articulator with a structure that allows the movement of the maxillary model arch to be adjusted to a certain degree, but in conventional articulators of this type, the condylar head is fixed with a spring or fixing screw. Also, an indicator used for eye point support is screwed to the maxillary model arch.

[Problem that the invention attempts to solve]

As mentioned above, in conventional articulators of this type, the condylar head is fixed with a spring or a fixing screw, which results in poor workability when movable and is complicated to operate. It has the disadvantage that it can only be used to indicate a single point, such as an eye point, and it gets in the way of work. The present invention has been developed with an eye to this problem, and has been designed to allow for reliable and accurate fixation of the condyle head and centric fixation with extremely simple operations, while also allowing the indicator to be used for multiple purposes. The purpose of the present invention is to provide an archon type semi-adjustable articulator.

[Means and actions for solving problems]

This articulator is equipped with a grip for adjusting and fixing the adjustable guide plate for the condylar box so as to protrude from the top surface of the condylar box, and even when the maxillary model arch and mandibular model arch are in operation. The orbiter indicator can be operated without separation, and the orbiter indicator can be detachably attached to the incisor guide nail and slidably semi-fixed, making it possible to adjust and fix the adjustable guide plate with a single touch. By simply moving the orbiter indicator along the incisor guide nail, it can be used to indicate the eye point, nasal alar point, occlusal plane, etc., check the progress and direction of the occlusal plane, and use it as a reference plate when aligning artificial teeth. You can.

〔Example〕

Next, the present invention will be explained in detail based on one embodiment shown in the drawings. 1 is an approximately U-shaped device in which a notch 1a coinciding with the occlusal plane and a notch 1b coinciding with the ear point are carved on the rear corner edge of the frame. 2 is a mandibular model arch formed integrally with the articulator main body 1; 3 is an maxillary model arch swingably mounted on the articulator main body 1 as described later; 4 is an articulator main body 1 5 is a condylar box that is rotatably attached to the left and right sides of the maxillary model arch 3 through a rotation shaft 6, and connects the condylar box 5 and the condylar bulb 4. By doing so, a semi-adjustable articulator is constructed. Each condylar box 5 has built-in an adjustable guidance board 7 for guiding the movement direction of the maxillary model arch 3, and this adjustment guidance board 7 is orthogonal to a sagittal condylar path slope adjustment board 8. The sagittal condylar tract inclination adjustment plate 8 is rotatably attached to the lower surface of the condylar box 5 by a pivot 10, and is the two pins 1
1 and 11 are arranged side by side and protruding, a condylar box 5 is attached from above the condylar bulb 4, and the condylar bulb 4 is connected to the sagittal condyle tract inclination adjustment plate 8 to adjust the lateral condylar tract angle on the equilibrium side. The shaft portion 12 of the condylar bulb 4 is brought into contact with the plate 9 at the same time.
If an O-ring 13 made of rubber or a coil spring is stretched between the pins 11, 11 protruding from the outer surface of the condylar box 5 and the condylar bulb 4 and the condylar box 5 are connected, an articulator can be formed. is configured. A threaded rod 1 having a rectangular (or half-moon-shaped) cross section is implanted on the top surface of the sagittal condylar path inclination adjustment plate 8.
An arcuate slot 15 centered on a pivot 10 whose tip end of 4 is bored into the top wall of the condylar box 5.
A washer 16 made of a slippery material such as Delrin, which is fitted onto the threaded end of the washer 16 and has a guide 16a, is screwed onto the adjustment operation and fixing grip 17. 17, and move the washer 16 to the left and right along the slot 15, and set the washer 16 to the desired scale on the equilibrium side lateral condyle angle scale 18 displayed over the top and front side of the condylar box 5. By aligning the markings 16a carved in the and tightening the gripper 17, the equilibrium side lateral condyle tract angle of the equilibrium side lateral condyle tract angle adjusting plate 9 is fixed at a desired angular position, and the condylar box Grip the grip 21 of the threaded rod 20 screwed into the tip of the forked part 19 into which the rotating shaft 6 of 5 is inserted, loosen the threaded rod 20 to make the rotating shaft 6 rotatable, and grip the condylar box 5. By rotating the condylar box 5, a desired scale of the sagittal condylar path inclination scale 22 displayed on the lateral arcuate surface of the top surface of the condylar box 5 is engraved on the lateral edge of the base of the maxillary model arch 3. By gripping the rear clamp 21 and tightening the screw rod 20 in accordance with the fixed index 23, the sagittal condylar path inclination can be fixed at a desired angular position. Note that when the left and right sagittal condylar path inclination adjustment plates 8 are fixed with the respective grips 17 at the outermost end (-10°) of the slot 15, the O-ring 13 is not tensioned. In both cases, the maxillary model arch 3 is constructed so that only the opening and closing movements of the hinge can be performed without the maxillary model arch 3 coming off from the mandibular model arch 2, that is, reliable fixation is performed centrically. Reference numeral 24 denotes an incisor guide nail which is vertically slidably inserted into the distal end of the maxillary model arch 3 and is fixed to the maxillary model arch 3 by tightening the gripped screw rod 25. The tooth guide nail 24 is provided with a scale 26 for adjusting the fixing position of the incisor guide nail 24 by matching it with the top surface of the distal end of the maxillary model arch 3. 2
7 is an incisor guide plate, 28 is an occlusal plane plate, 29 is an incisor indicator inserted through the incisor guide nail 24, and 30 is an orpitator indicator. As clearly shown in FIG. 6, the orbiter indicator 30 includes a base 31 made of a stepped machine that removably holds the incisor guide nail 24, an upright portion 32 extending along the incisor guide nail 24, and an upright portion 32. The incisor guide nail 24 is fixed by aligning the reference scale line of the scale 26 of the incisor guide nail 24 with the top surface of the distal end of the maxillary model arch 3. When the top surface of the upright portion 32 of the orbiter indicator 30 abuts the lower surface of the distal end of the maxillary model arch 3 with its lower end in contact with the incisor guide plate 27, the surface including the plate-like portion 33 is It coincides with the plane containing the condyle tract reference point, and it is also possible to lower the orbiter indicator 30 so that the plate-like part 33 coincides with the occlusal plane plate 28. Since the base 31 of the orbiter indicator 30 is made of a spring material, it is not only easy to attach and detach from the incisor guide nail 24, but also securely to any position on the incisor guide nail 24. Can be made stationary. Therefore, this orbiter indicator 30 can also be used by being installed in the opposite direction to that shown in FIG. 6, as shown in FIG. It can also be used as a reference when arranging artificial teeth.

Further, as shown in FIG. 8, the rotation of the condylar box 5 may be restricted by a stopper. That is, the eccentric stopper pin 34 is rotatably fitted on the surface of the condylar box 5 of the maxillary model arch 3 into which the rotating shaft 6 is inserted, while the condylar box 5 has an eccentric stopper pin 34 rotatably fitted on the corresponding surface of the condylar box 5 above the rotating shaft 6. When the rotating shaft 6 is inserted into the maxillary model arch 3, the eccentric stopper pin 34 is located within the recess 35, and the rotation of the condylar box 5 is controlled by the eccentric stopper pin 34. Side surfaces 35a, 35 of the recess 35
b. This sets the condylar box 5 to the sagittal condylar path slope scale 2.
2 can be rotated within a range corresponding to the fixed index 23.

[Effect of idea]

As described above, in the articulator of the present invention, the grip 17 serves both as an adjustment grip and a fixing grip, and the scale 18 is carved across the top surface and front side of the condylar box 5. Washer 16 that moves integrally with 17
Since the index 16a is engraved on the side, the sagittal condylar path inclination and the balanced lateral condylar path angle can be adjusted to desired angles with extremely simple operations, and the angle can be adjusted to suit the mandibular movement of a specific patient. It becomes possible to create dentures that cooperate with the patient. In addition, since the condylar bulb and condylar box are connected by an elastic O-ring made of rubber or coil spring, it is possible not only to prevent the maxillary model arch from lifting up, but also to prevent the maxillary model arch from separating. The maxillary model arch can move extremely smoothly during lateral movement or forward movement without causing excessive movement, and the return to the centric position is also ensured, allowing work to be carried out safely and efficiently. Furthermore, according to the articulator of the present invention, the orbiter indicator can not only be attached/detached and positioned with a single touch, but also can be used for multiple purposes, so that the fabrication of dentures can be carried out more efficiently, and the practical effects are extremely large. . In addition, since the proposed articulator is configured to ensure reliable centric fixation, it is extremely safe and secure in handling, and there is no chance of damage to parts or failure of moving parts. . Furthermore, the articulator of the present invention has a simple or simplified overall structure, so it can be provided at a relatively low price, and the parts can be easily replaced, making it extremely convenient in practice.

[Brief explanation of drawings]

Fig. 1 is a front view of the semi-adjustable articulator according to the present invention, Fig. 2 is a side view of the same, Fig. 3 is a plan view of the same, and Fig. 4 is a front view of the semi-adjustable articulator according to the present invention.
The figure is an enlarged exploded perspective view of the condyle head, Figure 5 is a partially enlarged view of the attachment part of the condylar box to the maxillary model arch, and Figures 6 and 7 are the attachment of the orbiter indicator to the incisor guide nail. FIG. 8 is an enlarged perspective view showing different mounting states, and FIG. 8 is a perspective view for explaining the stopper structure of the condylar box. 1... Articulator main body, 2... Mandibular model arch, 3...
Maxillary model arch, 4... Condylar bulb, 5... Condylar box, 6... Rotation axis, 7... Adjustable guidance board,
8...Sagittal condyle tract inclination adjustment plate, 9...Equilibrium side lateral condyle tract angle adjustment plate, 16...Washer, 16a...Indicator, 17...Adjustment operation and fixation clamp, 18...Equilibrium Lateral condylar path angle scale, 22... Sagittal condylar path inclination scale, 23... Fixed index, 24... Incisor guidance nail,
30... Orbiter indicator.

Claims (1)

[Scope of utility model registration request] It is equipped with an maxillary model arch, a mandibular model arch, and an incisor guide nail that is adjustably attached to the maxillary model arch, and a pair of condylar balls attached to the left and right sides of the articulator body and the maxillary model arch. The maxillary model arch is swingably mounted on the articulator body using a condylar box rotatably attached to the left and right sides and a sagittal condylar path slope adjustment plate adjustable to the condylar box. A semi-adjustable articulator comprising: a condylar box and a condylar bulb connected by an elastic ring, and a sagittal condylar path slope adjustment plate formed on the condylar box; A screw rod is inserted through an arcuate slot concentric with the rotation axis of the condylar box and protrudes above the top surface of the condylar box, and the sagittal condylar path inclination adjustment plate is fixed to the condylar box using this screw rod. An adjustment operation/fixation grip that can be screwed onto the condylar box to ensure the fixation of the centric, and a scale attached to the top and front side of the condylar box is attached to the adjustment operation/fixation grip. A semi-adjustable articulator characterized in that an index is integrally provided, and an orbiter indicator is detachably and semi-fixably slidably mounted on an incisor guide nail.