JP2007300984A - Dental articulator and angulus oris reference arm - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental articulator accurately imprinting the information for manufacturing teeth on a model. <P>SOLUTION: The dental articulator comprises at least a mandibular frame for supporting a mandibular model, a maxillary frame for supporting a maxillary model, a face bow attached movably to the maxillary frame, a bar-like body attached movably in the vertical direction to the face bow, a maxillary clutch attached movably to the bar-like body, and an angulus oris reference arm which is detachably attached to a support part of the maxillary clutch and which has an imprinting means in the extending rear end. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dental articulator, and more particularly to a dental articulator and a mouth angle reference arm capable of accurately marking information for manufacturing a tooth on a model.

  The dental articulator is a device for producing a denture or the like by adjusting the movement of the jaw while reproducing the movement of the jaw so that an irregular occlusal position does not occur according to the characteristics of the shape of the patient's jaw. The dental articulator includes a lower jaw frame to which a lower jaw model is attached and an upper jaw frame to which an upper jaw model is attached. An upper jaw frame is attached to a leg portion provided at a rear end portion of the lower jaw frame via an opening / closing mechanism (corresponding to a temporomandibular joint portion of a living body).

The opening / closing mechanism includes a pair of condylar spheres (corresponding to the mandibular condyle) provided on the legs of the mandibular frame, and a guideway for the condylar sphere provided on the maxillary frame (mandibular fossa of the living body). Equivalent to). The maxillary frame opens and closes around the line connecting the centers of the left and right condylar spheres. The guide path of the condylar sphere is at the rear end portion of the upper jaw frame, and an upper wall inclined downwardly by a sagittal condyle path inclination angle with respect to a reference plane defined by the upper surface of the upper jaw frame, and a rear end portion Formed from the side rear wall. The condylar sphere is guided in the condylar sphere guideway by the upper wall.
In addition, a posterior reference axis is provided on the opposite side of the condylar sphere via the leg, and a face bow can be attached to the posterior reference axis.

When the information in the jaw and mouth is reproduced on the articulator by the face bow, when providing information to the technician, information is provided so that the tooth distortion, length and width can be accurately reproduced in the patient's mouth. Need to provide.
For example, Trubite provides a tool that can be attached to the face and can identify and display the length and width of the face, the form of the maxillary anterior teeth, and the form of the mandibular anterior teeth. Alternatively, a method is known in which the tooth arrangement of an edentulous patient is determined from the lower front teeth in the oral cavity using a pronunciation method (pound method).

  However, with the conventional facebow, it is not possible to mark information on the model for producing teeth such as the ocular-ear plane, nasal column, midline, upper lip band, dry wet line, mouth corner, etc. It was. For this reason, when manufacturing a tooth from an articulator, it was difficult to convey the aesthetic feeling of an anterior tooth to a technician. In addition, since it is not easy to accurately transmit information for producing a tooth from a dentist to a technician, it is necessary for the dentist and the technician to work together while attending a patient.

  Therefore, an object of the present invention is to provide a dental articulator and a mouth angle reference arm capable of accurately marking information for manufacturing a tooth on a model.

  The dental articulator according to the present invention includes a lower jaw frame for supporting the lower jaw model, an upper jaw frame for supporting the upper jaw model, a face bow movably attached to the upper jaw frame, and an upper and lower sides of the face bow. A rod-shaped body that is movably mounted in a direction, an upper jaw clutch that is movably mounted on the rod-shaped body, and a mouth angle reference arm that is detachably mounted on a support portion of the upper jaw clutch, the rear end extending from the arm It is characterized in that at least a mouth angle reference arm provided with a marking means in the part is provided.

  The rod-shaped body includes a vertical position scale, and the mouth corner reference arm has a first extending member extending movably rearward at a rear end portion, and a first extending member movably extending rearward and laterally obliquely. 2 and a third extending member, and the extending member is preferably provided with a marking means at the rear end.

  The face bow includes a pointer, and the position of the tip of the pointer can be freely adjusted in the horizontal direction by sliding and rotating with respect to the face bow, and the pointer has a slide position scale. It is preferable that the face bow is provided with a rotational position scale.

  The mouth angle reference arm of the present invention is the mouth angle reference arm used in the dental articulator, and is detachable from the support portion of the upper jaw clutch.

By using the dental articulator or mouth angle reference arm of the present invention, the length, width diameter, canine, etc. of the ocular ear plane, nasal column, midline, upper lip band, dry wet line, mouth corner, etc. The position of the tooth and the information for manufacturing the tooth can be accurately marked on the model.
In other words, the mouth angle reference arm is detachably attached to the support portion of the upper jaw clutch, and has a marking means at its extending rear end, so that predetermined information can be marked on the model, so that distortion, plane deviation, It is possible to accurately record and reproduce information such as the left and right balance and size, and tooth length.

Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
FIG. 1 is an overall perspective view of a dental articulator 10 according to the embodiment, and FIG. 2 is a diagram for explaining a relationship between a joint 88 that is a support portion of an upper jaw clutch 81 and a mouth angle reference arm 102. 3 is a partial perspective view of the mouth corner reference arm 102 as viewed from above.

As shown in FIG. 1, the dental articulator 10 includes a lower jaw frame 20, an upper jaw frame 30 attached to the lower jaw frame 20 via an opening / closing mechanism, and a face bow 91.
A pair of legs 21 is provided at the rear end of the lower jaw frame 20, and condylar balls 22 are provided on the legs 21 so as to face each other. A guide path for the condylar sphere 22 is formed at the rear end portion of the upper jaw frame 30, and the condylar sphere 22 is guided in this guide path.

The lower jaw frame 20 is supported at three points by screws 23, 24, and 25, and the reference plane of the dental articulator 10 can be freely adjusted by rotating each screw up and down.
In this way, the screw is supported at three points, the screws 23, 24, and 25 are moved up and down, and the height at each support point is adjusted, thereby changing the reference plane of the dental articulator 10 and changing the upper jaw model. The inclination of the dentition plane can be corrected.

  The upper jaw frame 30 is provided with a member 93 so as to be rotatable, and the member 93 can be rotated by a screw 94 and placed on the face bow 91.

  The lower jaw frame 20 is provided with a posterior reference shaft 76 on the opposite side of the condylar sphere 22 via the leg 21, and an arm-shaped face bow 91 is attached to the posterior reference shaft 76. 91 is movably attached to the lower jaw frame 20.

  The face bow 91 includes a pointer 56. The pointer 56 can slide and rotate with respect to the face bow 91, and the position of the tip 33 of the pointer 56 can be freely adjusted in the horizontal direction. ing. The pointer 56 is provided with a slide position scale 31, and the face bow 91 is provided with a rotational position scale 32. While adjusting the slide amount and the rotation amount with the scales 31 and 32, the tip portion 33 of the pointer 56 is moved horizontally while touching the skin and fixed with the screw 57, so that the position of the front reference point can be accurately and easily Can be adjusted.

A rod-shaped body 51 is attached to the front side of the face bow 91 so as to be movable up and down. The rod-shaped body 51 is provided with a vertical position scale 59. The rod-shaped body 51 is moved relative to the face bow 91 in the vertical direction while adjusting the amount of movement by the vertical position scale 59, and the screw 52. It can be fixed with.
An upper jaw clutch 81 is fixed to the rod-like body 51 via joints 87 and 88. The joint 88 is fixed to the rod-shaped body 51, and the upper jaw clutch 81 is fixed to the rod-shaped body 51 by connecting the joint 87 on the upper jaw clutch 81 side and the joint 88 on the rod-shaped body 51 side and tightening the screw 89. By moving the rod-shaped body 51 relative to the face bow 91 in the vertical direction, the position of the upper jaw clutch 81 can be adjusted in the vertical direction.

  As shown in FIGS. 1 and 2, a bite fork 83 can be detachably attached to the upper jaw clutch 81. The bite fork 83 has a support part that can be attached to and detached from the bite fork 83. After removing the support part, the bite fork 83 is attached to the upper jaw clutch 81. The bite fork 83 may be provided with a known level.

  As shown in FIG. 2, a mouth angle reference arm 102 is detachably attached to a joint 88 that is a support portion of the upper jaw clutch 81. The mouth corner reference arm 102 is fixed to the joint 88 by attaching the mouth corner reference arm 102 to the joint 88 and fastening the screw 89 to the hole 289 provided in the joint 88 via the hole 189 provided in the mouth corner reference arm 102. The

The mouth angle reference arm 102 extends rearward from the attachment portion to the joint 88, and includes ink portions 121, 131, 141 serving as marking means at the rear end thereof.
Specifically, as shown in FIG. 3, the mouth corner reference arm 102 is extended at the rear end portion so as to be movable in the rearward and leftward and rightward diagonal directions, and extended members 142 and 143 that are movable in the rearward direction. Extending members 122, 123, 132, 133.

The extension member 143 is provided with a scale 146, and the extension member 142 can be slid with respect to the extension member 143 and extended rearward while adjusting the amount of forward and backward movement by the scale 146. .
A rear end portion of the extending member 142 includes an ink portion 141, and a midline or the like can be marked on the model. Specifically, in the case of the upper front tooth model, adjustment is made so that the ink portion 141 is disposed at a portion corresponding to the midline or the cut end portion of the central incisor.
Further, as shown in FIG. 3, the end portions of the extending members 143 and 142 are accommodated in the mouth angle reference arm 102 so as to be rotatable in the vertical direction by ball joints. By rotating the scale 150 while adjusting the amount of movement, the ink unit 141 can be moved in the vertical direction.

The extension member 123 is provided with a scale 126, and the extension member 122 can be slid with respect to the extension member 123 and extended rearward and diagonally while adjusting the amount of movement with the scale 126. it can.
The rear end portion of the extending member 122 includes an ink portion 121, and the position of the mouth corner and the like can be marked on the model. Specifically, in the case of the upper front tooth model, adjustment is made so that the ink portion 121 is disposed at a portion corresponding to the mouth corner or the canine.
Further, as shown in FIG. 3, the ends of the extending members 123 and 122 are accommodated in the mouth angle reference arm 102 so as to be rotatable in the vertical and horizontal directions by ball joints, and are provided on the mouth angle reference arm 102. The ink portion 121 can be moved in the horizontal and vertical directions by rotating the horizontal rotation position scale 124 and the vertical rotation position scale (not shown) while adjusting the movement amount.

The extension member 133 is provided with a scale 136, and the extension member 132 can be slid with respect to the extension member 133 while being adjusted by the scale 136 so as to extend rearward and obliquely to the left. it can.
The rear end portion of the extending member 132 is provided with an ink portion 131, and the position of the mouth corner can be marked on the model. Specifically, in the case of the upper front tooth model, the ink 131 is adjusted so as to be disposed at a portion corresponding to the mouth corner or the canine.
Further, as shown in FIG. 3, the ends of the extending members 133 and 132 are accommodated in the mouth angle reference arm 102 so as to be rotatable in the vertical and horizontal directions by ball joints, and are provided on the mouth angle reference arm 102. The ink part 131 can be moved in the horizontal and vertical directions by rotating the horizontal rotation position scale 134 and the vertical rotation position scale (not shown) while adjusting the movement amount.

  In addition, it is preferable that each said scale is attached | subjected to the 1-mm space | interval, and it is preferable that each said rotation position scale is attached to the scale for every 1 degree.

  First, as shown in FIG. 4, the positional relationship of the maxillary dentition is determined by the maxillary clutch 81. At this time, the upper lip is lifted by the upper surface of the end of the joint 87. The upper and lower positions of the upper jaw clutch 81 are adjusted accurately and easily by moving the upper jaw clutch 81 up and down relative to the face bow 91 while adjusting the amount of movement by the vertical position scale 59 and fixing with the screw 52. Further, the front / rear position of the upper jaw clutch 81 is adjusted while adjusting the amount of movement by the front / rear position scale 41.

Thereafter, as shown in FIG. 7, the upper jaw clutch 81 (and the joint 87 integrated with the upper jaw clutch 81) is removed, and the mouth corner reference arm 102 is attached to the joint 88 by tightening the screw 89. And as shown in FIG. 5, it adjusts so that the extension members 121 and 131 may come to the position of a corner of a mouth, respectively. In addition, as shown in FIG. 6, the position of the mouth corner generally coincides with the position of the side end portion of the canine when viewed from the front.
While adjusting the amount of movement by the vertical position scale 59, the vertical angle arm 102 is moved up and down with respect to the face bow 91 and fixed with the screw 52, so that the vertical position of the vertical angle reference arm 102 is adjusted accurately and easily. .
Further, the extension members 122, 132, 142 are slid with respect to the extension members 123, 133, 143 while adjusting the movement amounts by the scales 126, 136, 146, respectively, and the rotation position scales 124, 134, 150 are slid. While adjusting the amount of movement by rotating the extension members 122, 123 and 132, 133 with respect to the mouth angle reference arm 102, the positions of the ink portions 121, 131, 141 are adjusted and determined, and they are marked on the model. To do.

  The ink units 121, 131, and 141 may be detachable and replaceable with respect to the extending members 122, 132, and 142, respectively.

When adjusted, by recording the values of the vertical position scale 59, the slide position scale 31, the rotational position scales 32, 124, 134, 150, the front and rear position scale 41, the scales 126, 136, and 146, clinically, Information such as distortion, plane displacement, left and right balance and size, and tooth length can be recorded and reproduced accurately and easily.
In addition, the ink portions 121, 131, and 141 can accurately mark three-dimensional position information for manufacturing teeth on the model.

Note that the marking means provided at the rear end of the mouth corner reference arm 102 is not limited to the above. For example, the mouth corner reference arm 102 may include one, two, or many extending members.
Further, the moving direction of the extending member is not limited to the back-and-forth movement and the rotation movement in the horizontal direction.

1 is an overall perspective view of a dental articulator according to an embodiment. It is a figure explaining the relationship between the support part of an upper jaw clutch, and a mouth angle reference | standard arm. It is the partial perspective view which looked at a mouth angle reference arm from the upper part. It is a figure explaining the usage example of an upper jaw clutch. It is a figure explaining the usage example of a mouth angle reference | standard arm. It is a figure explaining the relationship between a mouth corner and a tooth. It is a figure explaining the relationship between a mouth angle reference arm and a joint.

Explanation of symbols

10 Dental Articulator, 20 Mandibular Frame, 30 Maxilla Frame, 21 Leg, 22 Condylar Ball, 91 Face Bow, 51 Bar, 81 Maxillary Clutch, 83 Bite Fork, 87, 88 Joint, 31 Slide Position Scale, 32 Rotation position scale, 59 Vertical position scale, 76 Back reference axis, 102 mouth angle reference arm, 122, 123, 132, 133, 142, 143 Extension member, 121, 131, 141 Ink part

Claims (4)

A lower jaw frame for supporting the lower jaw model,
An upper jaw frame for supporting the upper jaw model,
A face bow movably attached to the upper jaw frame;
A rod-like body attached to the face bow so as to be movable in the vertical direction;
An upper jaw clutch movably attached to the rod-shaped body;
A mouth angle reference arm that is detachably attached to the support portion of the upper jaw clutch, and has a mouth angle reference arm provided with a marking means at the extending rear end portion;
A dental articulator comprising at least a dental articulator. The rod-shaped body includes a vertical position scale,
The mouth angle reference arm includes, at a rear end portion, a first extending member that extends movably backward, and second and third extending members that extend movably in the rear left and right oblique directions. Prepared,
The dental articulator according to claim 1, wherein the extending member includes a marking means at a rear end portion. The face bow includes a pointer, and the pointer can slide and rotate with respect to the face bow to freely adjust the position of the tip of the pointer in the horizontal direction.
The dental articulator according to claim 1 or 2, wherein the pointer is provided with a slide position scale, and the face bow is provided with a rotational position scale.   The mouth angle reference arm used in the dental articulator according to any one of claims 1 to 3, wherein the mouth angle reference arm is detachable from a support portion of the upper jaw clutch.

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