JPH0137616Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a jaw position setting tool for complete dentures that can simultaneously determine the occlusal plane and jaw position.

Generally, in order to manufacture dentures with high precision, it is necessary to determine the occlusal plane and reproduce the positional relationship between the condylar head and the alveolar ridge on an articulator.

Conventionally, a jaw position setting device (face boat transfer) as shown in FIG. 1 has been used as an instrument for reproducing the positional relationship between the condylar head and the alveolar ridge.

In this jaw position setting device, a shaped frame 1 is arranged horizontally, and ear pieces 3, 3 attached to the distal ends of left and right side arms 2, 2 of this frame 1 are inserted into the patient's external auditory canal, and a reference pointer is inserted into the patient's external auditory canal. By positioning 4 at the lower edge of the nasal alar, the side arms 2, 2 become Camper's plane.
Further, a fork arm 8 is attached to the upper side of the transfer pin 5 via clamps 6 and 7, and a U-shaped bite fork 9 is further attached to the tip of the fork arm 8. An upper occlusal ridge made of wax whose occlusal plane has been determined in advance is joined onto this bite fork 9, and the patient's oral cavity is inserted to determine the positional relationship between the condylar head and the alveolar ridge.

Next, take it out of the mouth and earpieces 3, 3.
, turn the indicator needles 10, 10 inward,
This is attached to the hinge part 11 of the articulator shown in FIG. 2 and assembled, and the positional relationship between the patient's condylar head and alveolar ridge is reproduced on the articulator.

This articulator has a structure in which an upper jaw frame 13 with an incisal pole 12 attached to the tip and a lower jaw frame 15 with an incisal table 14 attached with which the lower end of the incisal pole 12 is attached are eccentrically connected. It can move eccentrically up and down, left and right, and front and back according to the movement of the human jaw, and is designed to reproduce the average human upper and lower jaw movements.

After combining the jaw position setting device with this articulator, the upper articulating ridge placed on the bite fork 9 is fixed to the upper jaw frame 13 with plaster via the upper jaw model, and then the lower articulating ridge prepared separately is attached to the lower jaw frame. 15
occlusal recording is performed to determine the three-dimensional positional relationship by fixing the jaw in the same way.

However, the above method is used when manufacturing dentures for edentulous jaws, but is not used when manufacturing complete dentures for edentulous jaws because it is difficult to determine the ideal occlusal plane.

Generally, in the conventional articulation of edentulous patients, the occlusal plane is determined because if the upper and lower occlusal ridges are separated, it is likely to cause curling when assembled into an articulator. The bite registration is completed by assembling the two parts in advance and attaching them to the articulator. In this case, when attaching to the articulator, the upper and lower occlusal ridges are joined together, so it is not possible to use the occlusal plane plate to position it correctly, and it is necessary to register and join with free hands. However, the dentures were not accurately centered, and the purpose of their use could not be achieved in reproducing the relationship between the upper and lower jaws of an average person, resulting in problems such as poor occlusion of the manufactured complete dentures.

In view of these points, and as a result of various studies, the present invention was developed by simultaneously determining the occlusal plane and jaw position from the state in which the upper and lower occlusal ridges are joined together, and the occlusal plane, condylar head, and alveolar ridge are placed on the articulator. The purpose of the present invention is to provide a jaw position setting device for complete dentures that can accurately reproduce the three-dimensional positional relationship of the teeth.

Embodiments of the present invention will be described in detail below with reference to the drawings.

3 to 5 show an embodiment of the present invention.

A shaped frame 1 is arranged horizontally at the upper end of the transfer pin 5, and ear pieces 3,
3 is attached so that it can be moved left and right. A reference pointer 4 is attached to the middle of one side arm 2 so as to be movable inward.

Reference numeral 16 is a Harken fork, and as shown in Fig. 4, the left and right forks 18, 18 with side Harkens 17, 17 protruding from the tips are connected to the U through a hinge 19.
Forks 18, 18 are assembled in a letter shape, have a median insertion pin 20 protruding from the center, and have a side harness 17 protruding from the hinge 19 as a rotation center.
is designed to rotate from side to side.

21 is a fork arm that supports the Harken fork 16 at the tip, and has a cylindrical shape with the tip side bent.
The rear end side is formed into a prismatic shape.

Reference numeral 22 denotes a clamp, which has a square hole 23 formed in the horizontal direction and a round hole 24 vertically formed therein, into which the prismatic rear end side of the arm 21 is inserted and fixed with a screw 25. A transfer pin 5 is inserted into the round hole 24 and fixed with a screw 25 at the same time.

Next, a method for manufacturing a complete denture using the jaw position setting tool having the above structure will be explained.

Upper and lower occlusal ridges 26A and 26B made of wax
are inserted into the patient's mouth and joined in the occlusal state,
As shown in FIG. 5, the jaw position setting device is set, and the ear pieces 3, 3 attached to the tips of both side arms 2, 2 are inserted into the patient's external auditory canal. Next, place reference pointer 4 at the lower edge of the nasal alar (approximately 5 mm above the lower edge of the nasal alar in the case of a dental hobby eighth bow).
By positioning both side arms 2,
2 becomes the Camper plane.

Further, the rear end side of the fork arm 21 with the Harken fork 16 attached to the tip has a prismatic shape and is inserted into the square hole 23 of the clamp 22, so that the Harken fork 16 can move in one direction, front and back. Therefore, the Harken fork 16 becomes parallel to the side arms 2, 2 through the clamp 22 due to the three-dimensional relationship between the vertical transfer pin 5 and the side arms 2, 2 attached thereto. Therefore, the plane formed by the median insertion pin 20 and the side hakens 17, 17 is parallel to the Camper's plane, and thus becomes an ideal occlusal plane.

Next, rotate both the left and right forks 18, 18 as shown by the arrows to insert the side hakens 17, 17 into the upper and lower occlusal ridges 26A, 26B, and while keeping the median insertion pin 20 inserted in the center, the upper and lower joined The occlusal ridges 26A, 26B are taken out of the oral cavity as shown in FIG.

Next, in this state, earpiece 3 of the jaw position setting device,
3, set it in the articulator shown in FIG. 2 with the indicator needles 10, 10 facing inward, and then
When A and 26B are fixed with plaster, the relationship between the condylar head and the alveolar ridge in the living body is reproduced on the articulator.

Next, when the jaw position setting tool is removed, it is joined to the upper and lower occlusal ridges 26A, 26B, and the side hakens 17, 17
The plane formed by the indentation formed by the median insertion pin 20 becomes an ideal occlusal plane, and if the upper and lower occlusal ridges 26A and 26B are separated using a hot plate or the like at this plane, the troublesome work that was done in the past can be avoided. The ideal occlusal plane can be determined easily and in a short time.

As explained above, according to the jaw position setting device for complete dentures according to the present invention, the occlusal plane and the jaw position can be determined simultaneously from the state where the upper and lower occlusal ridges are joined together. The three-dimensional positional relationship between the ideal occlusal plane, condylar head, and alveolar ridge can be accurately reproduced, making it possible to easily manufacture complete dentures with high precision.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional jaw position setting device;
The figure is a perspective view showing an articulator, Figures 3 to 5 show an embodiment of the present invention, Figure 3 is a perspective view of a jaw position setting device for complete dentures, and Figure 4 is a perspective view of a Harkenfork. A plan view showing the fork arm, and FIG. 5 a perspective view showing the state of use. 1... Frame, 2... Side arm, 3...
Earpiece, 4...reference pointer,
5... Transfer pin, 9... Bite fork, 10... Indicator needle, 12... Incisal pole, 13... Maxillary frame, 14... Incisal table, 15... Mandibular frame, 16... Harken fork , 17...Side Harken, 18
...Fork, 19 ... Hinge, 20 ... Median insertion pin, 21 ... Fork arm, 22 ... Clamp, 23 ... Square hole, 24 ... Round hole, 26A, 2
6B...occlusal ridge.

Claims (1)

[Scope of utility model registration request] The left and right forks with a side Harken protruding from the tips are combined into a U-shape via a hinge, and the Harken fork has a median insertion pin protruding from the center, and the Harken fork's hinge is supported at the tip and the rear end side is square. A fork arm having a columnar shape, a clamp having a rectangular hole into which the rear end side of the fork arm is horizontally inserted, and a round hole into which a transfer pin is inserted perpendicularly to the square hole, and the transfer pin. A jaw position setting device for complete dentures, characterized by comprising a frame shaped horizontally attached to the tip, earpieces attached to the tips of both side arms of the frame, and reference pointers attached to the side arms. .