JP2002360607A - Articulator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an articulator capable of accurately reproducing distortion of an upper jaw tooth shape caused by distortion of a maxilla. SOLUTION: An upper rotary plate 3 is divided into three parts of a base part 31, a rotary part 32, and a tip part 33. The base part 31 and the tip part 33 are joined by a rotary shaft installed in the lengthwise direction of the upper rotary plate 3, and the rotary part 32 is rotatably journaled to this rotary shaft. A mounting disk 51 for the upper jaw tooth shape is installed on an under surface of the rotary part 32 by fixed screws 34 and 34. When the upper jaw tooth shape is dislocated in the rotational direction of the Z axis, a fixed screw 41 of the rotary part 32 is loosened, and is adjusted to the distortion of the upper jaw tooth shape by rotating the rotary part 32. A turning angle of this rotary part 32 can be read by graduations 48 carved on a sliding contact plate 39 of the base part 31. Thus, accurate jaw joint position adjusting basic data can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dental articulator for reconstructing an occlusal relationship between upper and lower teeth by mounting a tooth model of an upper and lower jaw to perform correction and prosthesis.

[0002]

2. Description of the Related Art Conventional articulators, for example,
The articulator described in No. 42004 has a pair of sagittal condylar tract adjustment mechanisms 50 at the upper ends of a pair of columns 2 and 2 vertically implanted on a base 1 as shown in FIG. , 50,
One end of the rotating plate 3 is rotatably mounted on the lower surface of the rotating plate 3, and an upper jaw tooth mounting disk 5 for mounting an upper tooth model 9 is provided on a lower surface of the rotating plate 3. A lower disc mounting disk 6 for mounting a tooth model is provided.

The rotation angle of the lower tooth mounting disk 6 with respect to the base 1 in the Z-axis direction is determined by a pointer 36 provided on a seat 42 and a scale 37 engraved on the circumference of the lower tooth mounting disk 6. Can read.

The position of the lower jaw mounting disk 6 can be adjusted in the front-rear direction by means of a knob 24, and the distance of movement can be adjusted by a scale 39 engraved on the side surface of the base 1 and the lower jaw mounting disk 6. Can be read by the pointer 38 engraved on the circumference of the circle.

The vertical distance between the mounting disc 5 for the upper tooth profile and the mounting disc 6 for the lower tooth profile can be adjusted by slide mechanisms 20 provided on the left and right columns 2,2.

The position of the incisor serving as a reference point for producing the tooth profile model is set by the incisor guiding mechanism 7. The positions of the jaw joints of the upper tooth model 9 mounted on the mounting disk 5 for the upper tooth model and the lower tooth model mounted on the mounting disk 6 for the lower tooth model are controlled by the two sagittal condyle path adjusting mechanisms 50, 50. It is restored three-dimensionally. Further, the inclination of the left and right lower tooth shapes as viewed from the side is corrected by adjusting the length of the left and right columns 2 by the slide mechanism 20.

[0007]

In this way, the relative position of the mounting disc 5 for the maxillary tooth model with respect to the mounting disc 6 for the lower tooth profile is adjusted so as to reproduce the tooth profile of the patient. It may be distorted. That is, the maxilla to which the maxillary teeth are connected is separated from the frontal bone by a suture line below the eyes, and is not always in the correct position with respect to the skull.

If the maxilla is distorted, the maxillary teeth are inclined with respect to the mandibular teeth even if the temporomandibular joint is in the correct position. In such a case, the inclination cannot be adjusted with a conventional articulator.

In view of the above, the present invention improves the above-mentioned drawbacks of the conventional articulator, and allows the relative position of the upper and lower teeth of the patient on the articulator even when the maxillary teeth are distorted due to the distortion of the maxilla. An object of the present invention is to provide an articulator having an adjustment function that can be accurately reproduced.

[0010]

According to the present invention, an articulator capable of achieving the above object can be obtained by rotatably mounting a mounting disk for maxillary teeth on an upper rotating plate of an articulator. .

That is, in the articulator of the present invention, the mounting disk for the maxillary teeth is rotatably mounted around the longitudinal center line of the upper rotating plate of the articulator as a rotation axis, and can be fixed at a predetermined rotation position. It is characterized by comprising.

Specifically, the upper rotating plate of the articulator is divided into a base portion, a rotating portion, and a distal end portion, and the rotating portion is rotatable about a rotating shaft connecting the base portion and the distal end. A fixing means for supporting and fixing a turning position between the turning portion and the base portion, and an attaching / detaching means for detachably attaching the upper-tooth-shaped mounting disc to the turning portion. It is.

Further, a display means for displaying a relative rotation position between the upper disc and the upper disc is provided.

The display means may be one of an upright plate provided at one end of the rotating portion on the base portion side and a sliding contact plate provided at one end of the rotating portion of the base portion in sliding contact with the upright plate. It comprises a reference line provided on one side and an adjustment scale indicating the rotation angle of the rotation section provided on either side.

[0015]

FIG. 1 is a perspective view showing an entire articulator according to an embodiment of the present invention, wherein 1 is a base, 2 is a column, 20 is a vertical adjustment mechanism, 3 is an upper rotating plate, Reference numeral 51 denotes a mounting disk for an upper tooth profile, 60 denotes a mounting disk for a lower tooth profile, 61 denotes an upper rotation plate, 62 denotes a lower rotation plate, and 7 denotes a cutting tooth guiding mechanism. The upper turning plate 3
It is divided into three parts, a base part 31, a rotating part 32 and a tip part 33.

Further, the base 31 of the upper rotating plate 3 is
As shown in FIG.
6 (FIG. 1) to form a through hole 45. A rotary shaft (not shown) for connecting the sagittal condyle path adjusting mechanisms 50, 50 is loosely inserted into the through hole 45, and the base 31, that is, the upper rotary plate 3 is rotated vertically about the rotary axis. Be moved.

At the tip of the tip 33, an upper incisor guiding pin 7 is provided.
1 is attached by a fixing screw 75 so as to be adjustable. A block body 72 is fixed to the lower end of the upper guiding pin 71, and a lower incisor guiding pin 76 is loosely inserted into the block body 72, so that it can be fixed at an arbitrary position by a fixing screw 74. A base 1 is provided at the tip of the lower incisor guiding pin 76.
Is in contact with the incisor guide plate 73 attached to the incisor. The incisor guiding mechanism 7 composed of the upper and lower incisor guiding pins 71 and 76 and the incisor guiding plate 73 can adjust the distance between the upper and lower teeth.

As shown in FIG. 3, the base 31 and the tip 33 are connected by a rotating shaft 35. Cutting portions 49, 49 are provided at both ends of the rotating shaft 35, and the distal ends of the mesh nuts 37, 37 screwed to the base 31 and the distal end portion 33 project into the cutting portions 49, 49, respectively.
Are fixed to the base 31 and the tip 33. The rotating part 32 is rotatably supported by the rotating shaft 35. On the lower surface of the rotating part 32, a mounting disk 51 for an upper jaw tooth shape is attached by fixing screws 34,34.

An upright plate 38 having a semicircular head 44 (FIG. 4) is erected at the end of the rotating portion 32 on the base 31 side. 43 is cut vertically. A sliding contact plate 3 having a semicircular head 46 is provided at the end of the base 1 on the side of the rotating portion 32 so as to cover the head 44.
9 are erected.

An elongated hole 42 (FIG. 2) is cut in the center of the head 46, and a fixing screw 41 is loosely inserted into the elongated hole 42. The fixing screw 41 further has a screw hole 43 in the upright plate 38.
Is screwed into. When the fixing screw 41 is screwed in, its tip reaches the rotation shaft 35, and the rotation portion 32 can be fixed to the rotation shaft 35 by further strongly screwing the fixing screw 41.

As shown in FIG. 4, a reference line 47 is engraved on the side surface of the head 44 of the upright plate 38.
A scale 48 is engraved on the side surface of the head 46 of the ninth embodiment. The rotation angle of the rotation unit 32 can be read from the reference line 47 and the scale 48.

As shown in FIGS. 5 and 6, the mounting disc 51 for the maxillary tooth model has three projections 55.
A disc-shaped iron container 53 in a concave groove provided in the center of the surface of the disc.
Is embedded. The disk-shaped permanent magnet 52 is attracted to the iron container 53. A cylindrical groove 54 is cut in the center of the back side of the disk. The groove 54 is also opened through the bottom of the iron container 51. Note that 56
Is a screw hole into which the fixing screws 34 are screwed.

Next, a method of using this device will be described. The tooth profile models collected from the patient are set on the mounting discs 51 and 60 for upper and lower jaw teeth, respectively. That is, since the permanent magnet 52 is embedded in the mounting disk 51, the iron base plate of the tooth model can be easily attracted and set. Further, the three projections 55 are fitted into positioning grooves cut out on the iron base plate of the tooth profile model, and are set at correct positions.

The cylindrical groove 54 is used for inserting a suitable rod into the groove to protrude the tooth model from the mounting disk 51 in order to remove it from the mounting disk 51. The mounting disk 51 on which the tooth model is set is placed on the upper rotating plate 3.
Are attached to the rotating portion 32 of the rotator by fixing screws 34, 34.
In the case of the lower jaw mounting disk 60, a tooth profile model is set in substantially the same manner, and attached to the base 1 of the articulator.

In this manner, the sagittal condylar tract adjusting mechanism 50 of the articulator in which the upper and lower tooth model mounting discs are set is adjusted three-dimensionally, and the position of the patient's temporomandibular joint is correctly reproduced on the articulator. I do.

Next, a portion of the temporomandibular joint is photographed by an X-ray photograph, and the state of the temporomandibular joint is observed. As a result, when the lower jaw tooth profile is shifted in the front-rear direction, the fixing screw in the front-rear direction of the mounting disc 60 for the lower jaw profile is loosened, and the positioning of the incisor in the tooth model in the front-rear direction is performed. The moving distance at that time is read on a scale and recorded.

The displacement of the incisors in the left-right direction is adjusted by rotating the lower disc mounting disk 60 in the Z-axis direction, and reading and recording the rotation angle at that time on a scale.
Further, the adjustment by the shift of the back teeth is performed by rotating the upper rotation plate 61 with respect to the lower rotation plate 62 about the rotation shaft 63 as an axis. The structure and operation and effect of the mounting disk 60 for the lower jaw tooth shape are described in detail in Japanese Patent Application No. 2000-171888 by the present inventor.

Finally, the rotational deviation of the maxillary tooth profile due to the distortion of the maxillary bone loosens the fixing screw 41 and causes the rotating portion 32 to rotate.
Is rotated, and the rotation angle at that time is set to the reference line 47 and the scale 4
Read at 8 and record this.

Using the three-dimensional correction values obtained in this manner, an auxiliary tool for adjusting the position of the temporomandibular joint is created while referring to the state of the temporomandibular joint photographed with the X-ray. This aid is used between the upper and lower teeth to correct the position of the temporomandibular joint.It is usually worn at bedtime to guide the position of the lower jaw to the correct position. In addition to returning the relationship to a normal position, it promotes recovery of the mandibular condyle and the joint disk if they are worn or damaged, and heals the abnormal state of the temporomandibular joint from the root.

[0030]

(1) In the articulator of the present invention, the mounting disc for the maxillary teeth is rotatable about the longitudinal center line of the upper rotating plate with respect to the upper rotating plate of the articulator. Since it is configured to be attached and fixed at a predetermined rotation position, the distortion of the maxillary tooth-shaped skull caused by the distortion of the maxilla can be accurately reproduced on the articulator.

(2) The articulator of the present invention is provided with display means for displaying the relative rotational position between the mounting disk for the maxillary teeth and the upper rotating plate. The degree of distortion of the maxillary tooth shape with respect to the skull can be accurately recorded, and a correction value for correcting the maxillary tooth shape can be accurately obtained.

(3) If the temporomandibular joint is positioned in a normal state by using the auxiliary tool for positioning the temporomandibular joint produced based on the basic data obtained by using the articulator of the present invention, The chewing position can be stabilized. In addition, if the temporomandibular joint is at a normal position, it is possible to avoid respiratory failure due to throat compression due to improper position of the temporomandibular joint at bedtime and snoring caused thereby. Furthermore, if the temporal bone is moved to a normal position by using the above-mentioned auxiliary tool, the position of the semicircular canal can be corrected to the correct position, tinnitus,
It can cure indefinite complaints such as dizziness.

[Brief description of the drawings]

FIG. 1 is a perspective view of an articulator according to the present invention.

FIG. 2 is a plan view of an upper rotating plate.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a cross-sectional view taken along line BB of FIG. 2 (with a mounting disk removed).

FIG. 5 is a rear view of a mounting disk for maxillary teeth.

FIG. 6 is a sectional view taken along line CC of FIG. 5;

FIG. 7 is a perspective view of a conventional articulator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 2 Prop 3 Upper rotation plate 31 Base 32 Rotation part 33 Tip 35 Rotation axis 51 Mounting disk for maxillary teeth 52 Permanent magnet 53 Iron container 55 Projection

Claims (4)

[Claims] 1. A mounting disk for a maxillary tooth profile is rotatably mounted on an upper rotating plate of an articulator about a longitudinal center line of the upper rotating plate as a rotation axis and can be fixed at a predetermined rotating position. An articulator characterized by having been configured as described above. 2. The articulator according to claim 1, further comprising display means for displaying a relative rotation position between the upper-tooth-shaped mounting disc and the upper rotation plate. 3. The upper rotating plate is divided into a base portion, a rotating portion, and a distal end portion, and the rotating portion is rotatably supported on a rotating shaft connecting the base portion and the distal end portion, and A fixing means for fixing a turning position between the turning portion and the base portion, and an attaching / detaching means for detachably attaching the upper jaw-shaped mounting disc to the turning portion are provided. The articulator according to claim 1 or 2. 4. An upright plate provided at one end of the rotating portion on the base side, and a sliding contact plate provided on one end of the rotating portion of the base in sliding contact with the upright plate. 3. The articulator according to claim 2, wherein the articulator comprises a reference line provided on one of the two sides, and an adjustment scale indicating the rotation angle of the rotating portion provided on the other side.