JP2004136072A - Dental articulator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental articulator in which the occlusal relation of teeth of the upper and lower jaws is highly accurately adjusted. <P>SOLUTION: In the dental articulator (10), an incisive guide plate (40) is equipped with a body frame (41), a mount (42) which is pivoted with respect to the body frame, and right and left lateral alae (43) provided with lateral ala angle adjusting mechanisms, and an upper surface of the mount (42) is configured to be oriented both forwards and backwards. For example, the incisive guide plate (40) can be mounted to the front end portion of a lower jaw frame (20) in both forward and backward directions (A, B). <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a dental articulator, and more particularly, to a dental articulator provided with a specific incisor guiding plate and a condylar ball guiding mechanism.
[0002]
[Prior art]
The dental articulator is a device for manufacturing a denture or the like by adjusting the movement of the jaw while reproducing the movement of the jaw so that malocclusion does not occur according to the characteristics of the shape of the jaw of the patient. The dental articulator includes a lower jaw frame on which a lower jaw model is mounted, and an upper jaw frame on which an upper jaw model is mounted. An upper jaw frame is attached to a leg provided at a rear end of the lower jaw frame via an opening / closing mechanism (corresponding to a jaw joint of a living body).
[0003]
The opening / closing mechanism includes a pair of condylar spheres (corresponding to the mandibular head of a living body) provided on the legs of the mandibular frame to face each other, and a guide path of the condylar sphere provided on the maxillary frame (mandibular fossa of the living body) ). The maxillary frame performs an opening and closing motion using a line connecting the centers of the left and right condylar spheres as a rotation axis. The guide path of the condylar sphere is located at the rear end of the maxillary frame, and has an upper wall inclined downward by an angle α (sagittal condylar inclination angle) with respect to a reference plane defined by the upper surface of the maxillary frame. , And a rear wall on the rear end side. The condylar sphere is guided by the superior wall in the condylar sphere guideway.
[0004]
In addition, an incisor guiding plate is provided at the front end of the lower jaw frame, and an incisor guiding rod that slides on the upper surface of the incisor guiding plate is provided at the front end of the upper jaw frame. The vertical jaw distance between the frames can be maintained. The incisor guide plate includes a main body frame and a base portion pivotally supported by the main body frame, and the base portion can be inclined only forward with respect to a reference plane.
[0005]
[Problems to be solved by the invention]
FIG. 8 schematically shows the relationship between the front teeth 1 of the upper jaw model and the front teeth 2 of the lower jaw model. In other words, the movement directions during mastication are classified into three, that is, a fitting position, a rear direction, and a front direction, as shown in FIG.
[0006]
FIG. 8A shows a case where the contact area between the upper and lower teeth is maximized. O1 is the relative position of the front teeth 2 with respect to the front teeth 1, which corresponds to the case where the contact point where the incisor guiding rod contacts the upper surface of the incisor guiding plate is the base point O.
[0007]
FIG. 8 (b) shows the direction of movement of the teeth and the condylar sphere in the posterior region during mastication (rearward movement region). The position of the front tooth 2 of the lower jaw model is R1, which is lower than that of O1. Are located relatively behind the front teeth 1.
[0008]
FIG. 8C shows the direction of movement of the teeth and the condylar sphere in the front region during mastication (front movement region). The position of the front tooth 2 of the lower jaw model is A1, and the front tooth 2 is smaller than the case of O1. It is located relatively forward of the front teeth 1.
[0009]
As described above, although the relationship between the upper jaw model and the lower jaw model is various, it is difficult for the conventional dental articulator to sufficiently perform such an adjustment from O1 to A1 and an adjustment from O1 to R1. There is a problem that it is difficult to adjust the occlusal relationship between the upper and lower jaw teeth with high accuracy.
[0010]
In addition, since the shape of the patient's jaw is diverse, the upper and lower jaw models are likely to be inclined, and the plane of the dentition may be inclined from the horizontal plane. In such a case, the occlusal relationship between the upper and lower jaw teeth may be reduced. It has been more difficult to adjust with high precision.
[0011]
Accordingly, an object of the present invention is to provide a dental articulator capable of adjusting the occlusal relationship between upper and lower jaw teeth with high accuracy.
[0012]
[Means for Solving the Problems]
A dental articulator according to the present invention is a dental articulator having a lower jaw frame for supporting a lower jaw model and an upper jaw frame for supporting an upper jaw model, and a pair of rear end portions of the lower jaw frame. Are provided, condylar spheres are provided on the legs facing each other, an incisor guiding plate is provided at the front end of the lower jaw frame, and at the rear end of the upper jaw frame. Is provided with a guiding mechanism of the condylar sphere, the front end of the maxillary frame is provided with an incisor guiding rod that slides on the upper surface of the incisor guiding plate, the incisor guiding plate is a main body frame, And a base portion pivotally supported with respect to the main body frame, wherein an upper surface of the base portion is configured to be capable of being oriented both forward and rearward.
[0013]
With this configuration, the adjustment from O1 to A1 and the adjustment from O1 to R1 can be easily and accurately performed, and the occlusal relationship between the upper and lower jaw teeth can be adjusted with high accuracy.
[0014]
It is preferable that the incisor guiding plate further includes left and right wings provided with a side wing angle adjusting mechanism. The left and right wings are, for example, provided to be pivotally supported on the base.
[0015]
The incisor guide plate can be attached to the front end of the lower jaw frame in both front and rear directions of the incisor guide plate, so that the upper surface of the base is oriented both forward and backward. It may be configured to be possible.
[0016]
In the case where the base is pivotally supported on the main body frame so as to be tiltable only forward, the incisor guide plate having the base can be attached to the front end of the lower jaw frame in the front and rear reverse direction. Thus, the upper surface of the base can be oriented both forward and backward, and the occlusal relationship between the upper and lower jaw teeth can be adjusted with high accuracy.
[0017]
The dental articulator of the present invention further includes a holder for the upper and lower jaw models, and the incisor guiding rod is provided when the tooth contact area of the upper and lower jaw models attached to the holder is maximized. When the point contacting the upper surface of the base is defined as a base point O, the base can rotate back and forth with respect to the main body frame around the base point O, so that the upper surface of the base is forward and You may be comprised so that alignment is possible to any of the back.
[0018]
By allowing the base to rotate back and forth with respect to the main body frame about the base point O, the upper surface of the base can be oriented both forward and rearward, and the occlusal relationship between the upper and lower jaw teeth is achieved. Can be adjusted with high precision.
[0019]
The dental articulator of the present invention may be configured such that the base is pivotally supported with respect to the main body frame near the center before and after the base.
[0020]
The guide mechanism for the condylar sphere may include a guide path for the condylar sphere, and a rear wall on the rear end side forming the guide path for the condylar sphere may be thin.
[0021]
In this way, by making the posterior end side of the condylar ball guideway thin, the condylar ball guideway is expanded toward the posterior part of the maxillary frame, so that the above-described adjustment from O1 to A1 and O1 are performed. To R1 can be easily and accurately adjusted, and the occlusal relationship between the upper and lower jaw teeth can be adjusted with high accuracy. That is, when fine adjustment of the occlusal relationship is performed, the upper bow and the lower bow are easy to move, and the handling is improved, so that an articulator that is more convenient in the production of the technical side can be provided.
[0022]
Further, the dental articulator according to the present invention has a lower jaw frame including a pair of legs at a rear end thereof and a condylar sphere provided opposite to each other, and a incisor guiding plate at a front end. And an upper jaw frame provided with a guiding mechanism for the condylar sphere at a rear end thereof, and an incisor guiding rod which slides on an upper surface of the incisor guiding plate at an anterior end thereof. The bottom of the lower jaw frame is supported at three points by three screws.
[0023]
Since the three points are supported by the screws as described above, the plane of the tooth row can be corrected so as to substantially coincide with the horizontal plane by rotating each screw and moving it up and down.
[0024]
The dental articulator of the present invention may further include a holder for the upper and lower jaw models, and the holder may include a level.
[0025]
By turning the screw using the level in this way, it is possible to easily correct the tooth row so that the plane coincides precisely with the horizontal plane. By using the level, the position can be moved in the same manner as when applied to the patient, and the adjustment operation can be performed under the same conditions.
[0026]
The level is a scale indicating a change in the position of the bubble inside, and has at least a concentric measurement scale centered on the position of the bubble when the bubble is horizontal. You may.
[0027]
The end of the incisor guiding rod may be configured to have three projections.
[0028]
With this configuration, it is possible to prevent displacement of the contact points of the teeth of the upper and lower jaws, and it is possible to perform the adjustment with high accuracy.
[0029]
The dental articulator of the present invention further includes a reference device, the reference device includes a support bar provided with a vertical position scale, and a pointer supported to be vertically movable and rotatable with respect to the support bar. And a mounting fixed to the support rod, the pointer can slide and rotate to freely adjust the position of the tip of the pointer, and even if the mounting includes a level. Good.
With this configuration, adjustment can be performed with high accuracy.
[0030]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings, but the present invention is not limited thereto.
[0031]
(First Embodiment)
FIG. 1 is an overall perspective view of a dental articulator according to Embodiment 1, FIG. 2 is a right side view of an upper jaw frame 30, and FIG. 3 is a front view of a lower jaw frame 20 in FIG. It is the figure which looked at the state which attaches the incisor guidance board 40 from the lower part. FIG. 4 is a view showing a state where the holders of the upper and lower jaw models are attached. FIG. 10A is a diagram of the relationship between the fitting jig 38 and the condylar sphere 22 in FIG. 2 as viewed from below.
[0032]
As shown in FIGS. 1 to 3, the dental articulator 10 includes a lower jaw frame 20 and an upper jaw frame 30. A pair of legs 21 are provided at the rear end of the lower jaw frame 20, and condylar spheres 22 are provided on the legs 21 so as to face each other. A guide path 31 for the condylar sphere is formed at the rear end of the maxillary frame 30 by a fitting jig 38. The condylar ball guideway 31 includes an upper wall 49 inclined downward by an angle α (sagittal condylar inclination angle) with respect to a reference plane defined by the upper surface of the maxillary frame 30, and a rear wall on the rear end side. 33 and a side wall 103. The angle α is provided with a scale G (preferably the scale is provided at 1 ° intervals, or may be provided at 5 ° intervals).
[0033]
While being guided by the upper wall 49 and the side wall 103, the condylar sphere 22 can move along the condylar sphere guideway 31 in the direction of the arrow in FIG. As shown in FIG. 2 and FIG. 10A, a slit 102 is provided below the fitting jig 38, and the condylar sphere 22 is fixed by a screw 100 through the slit 102. The screw 100 can move through a vertical hole of the slit 102. The screw 100 is of a double stopper type that holds the condylar sphere 22 at the distal end and holds the slit 102 by the stopper 101.
[0034]
As shown in FIG. 10B, the side wall 103 is configured to move in the direction indicated by the arrow X in FIG. 10A, and the condylar sphere 22 is fixed by a screw 100 at a desired position. Is also good. With this configuration, the condylar sphere 22 can be adjusted not only in the traveling direction of the guide path but also in the left and right directions (arrow P in FIG. 10A) relative to the guide path 31. The limit movement on the bowl can be adjusted in any direction.
[0035]
An incisor guiding plate 40 is attached to a front end of the lower jaw frame 20. The incisor guide plate 40 includes a support portion 46, a main body frame 41, a base 42 pivotally supported by the main body frame 41, and left and right wings 43 having a side wing angle adjusting mechanism. The support part 46 is attached to the front end of the lower jaw frame 20 on the part A side. The main body frame 41 is fixed on the support 46. In the main body frame 41, the inclination angle γ with respect to the reference plane can be adjusted by the adjustment knob 44 so that the base 42 is oriented (inclined) forward. The pedestal section 42 is provided with left and right wings 43 symmetrically as viewed from the front, and the left and right wings 43 can adjust the side wing angle δ with respect to the reference plane by adjusting knobs 45 respectively.
[0036]
At the front end of the upper jaw frame 30, there is provided an incisor guiding rod 32 that slides on the upper surface of the incisor guiding plate 40 (the upper surface of the pedestal portion 42). The intermaxillary distance can be maintained.
[0037]
In the first embodiment, the support portion 46 of the incisor guiding plate 40 extends back and forth from the main body frame 41, so that the B portion side of the indicating portion 46 can be attached to the front end of the lower jaw frame 20. Is a feature. As described above, since the incisor guiding plate 40 has a structure that can be attached to the lower jaw frame 20 in the front and rear opposite directions, the upper surface of the base portion 42 can be oriented both forward and backward. That is, as shown in FIG. 1, if the part A is attached to the lower jaw frame 20, the upper surface of the platform 42 can be oriented forward, while if the part B is attached to the lower jaw frame 20, the upper surface of the platform 42 can be oriented. Can be oriented backwards.
[0038]
Further, as another characteristic point of the first embodiment, the lower jaw frame 20 is supported at three points by screws 23, 24, and 25. Can be freely adjusted. In this way, the bottom of the lower jaw frame 20 is three-point supported by the screw, in other words, the dental articulator 10 is three-point supported by the screw, and the screw is moved up and down by the rotation of each screw, and at each support point The height can be adjusted easily, so if the upper and lower jaw models are tilted and the plane of the dentition deviates from the horizontal plane, it should be easily corrected so that the plane of the dentition almost matches the horizontal plane Can be.
[0039]
Furthermore, a case where the holder 90 of the upper jaw model is attached to the dental articulator 10 will be described with reference to FIG. The holder 90 includes an arm (a holder for an upper and lower jaw model) 91 connected to the leg portion 21, a rod 92 fixed and supported by the arm 91, and directed toward the center of the dental articulator 10 fixed and supported by the rod 92. And an upper jaw model holding arm 93 extending substantially in a U-shape. The upper jaw model holding arm 93 is provided with a well-known level 94. The illustration of the upper jaw model is omitted. When the plane of the dentition is inclined from the horizontal plane, the screw 23, 24, 25 is rotated up and down while observing the measurement result of the level 94, so that the plane of the dentition accurately matches the horizontal plane. Can be corrected. That is, by moving the screw 23, 24, 25 of the dental articulator 10 up and down, the reference plane of the dental articulator 10 is changed. As a result, the plane of the tooth row of the upper jaw model held by the holder 90 is changed. The inclination can be corrected.
[0040]
The level 94 may be provided with a lens for enlarging the scale of the level. By doing so, it is possible to adjust with high accuracy even if the user's eyesight is reduced.
[0041]
Further, as shown in FIG. 7, the fitting jig 38 of FIG. 2 is replaced with a fitting jig 78. The fitting-type jig 78 has a thin rear wall 73 on the rear end side, and a condylar ball guide path 71 is formed by the rear wall 73, the upper wall 49, and the side wall 103. For example, the thickness of the rear wall 78 of the jig 78 is preferably smaller by 3 mm to 5 mm than the thickness of the rear wall 33 of the jig 38.
[0042]
When the fitting jig 78 is replaced, the upper surface of the incisor guiding plate 40 (the upper surface of the base 42) is oriented rearward. The posterior end of the condylar ball guideway 71 is thin, and the condylar ball guideway 71 is expanded rearward of the maxillary frame 30 so that the upper jaw frame 30 is relative to the lower jaw frame 20. It is much easier to place it forward. That is, the above-described adjustment from O1 to R1 in FIG. 8 is further facilitated.
[0043]
As shown in FIG. 14, the fitting jig is a fitting jig provided with a front wall 110 which can move back and forth in the condylar ball guide path 71 and has a function of pressing the condylar ball from the front by the movement. 78 '.
[0044]
Hereinafter, the operation of the dental articulator 10 according to the first embodiment will be described with reference to FIGS. 8 and 5.
[0045]
FIG. 5 is a diagram schematically illustrating the relationship between the movement of the upper jaw frame 30 and the arrangement of the incisor guiding plate 40 and the incisor guiding rod 32. 8, O1, R1, and A1 are relative positions of the front teeth 2 of the lower jaw model with respect to the front teeth 1 of the upper jaw model. O, R, and A in FIG. 5 are contact points where the incisor guiding rod 32 contacts the upper surface of the incisor guiding plate 40, and correspond to O1, R1, and A1 in FIGS. 8A to 8C, respectively. ing.
[0046]
As shown in FIGS. 8 (c), 5 (b), and 2, the front movement area can be reproduced by orienting the incisor guiding plate 40 and the guide path 31 forward, and the contact point is set to O. To A. On the other hand, as shown in FIG. 8B, FIG. 5A, and FIG. 7, the backward movement area can be reproduced by orienting the incisor guiding plate 40 and the guide path 71 backward, and the contact point can be obtained. Can be moved from O to R. As described above, by using the dental articulator 10 according to the present invention, by changing the orientation direction of the incisor guiding plate 40 by replacing the fitting jigs 38 and 78, the adjustment from O1 to A1 and from O1 to R1 are performed. Can easily and accurately be performed, and the occlusal relationship between the upper and lower jaw teeth can be adjusted with high precision.
[0047]
In the above description, by replacing the fitting jig, the front motion area is reproduced when the rear wall on the rear end side forming the guide path is thick (fitting jig 38), and is thin ( The rearward movement area can be reproduced in the fitting jig 78, but the present invention is not limited to this. Even if the articulator (the jig is detachable or non-removable) having the thin fitting jig 78 is used. The present invention is also applicable to the case where both the reproduction of the forward motion region and the reproduction of the rear motion region are realized by changing the orientation direction of the incisor guiding plate.
[0048]
Moreover, the thickness of the rear wall on the rear end side forming the guide path may be increased or decreased by screws or the like.
[0049]
Further, in the above, the arm 91 is provided with the pointer 210 which can be moved by sliding or rotating with respect to the arm 91 so that the tip of the pointer 210 can be moved to adjust the position of the forward reference point accurately and easily. It may be.
[0050]
Alternatively, the dental articulator of the present application may include a reference device 300 as shown in FIG. As shown in FIG. 16, the reference device 300 includes a support rod 211 provided with a vertical position scale 212, a pointer 210 supported to be vertically movable and rotatable with respect to the support rod 211, and a support rod 211. It consists of a fixed mounting 213. The mounting 213 is provided with a level 95. The mounting 213 is inserted into the mouth in the direction of the arrow M in FIG. 16 and is held in position, so as to match the upper front teeth portion or the dry wet line of the lower lip. The pointer 210 is moved up and down while maintaining the horizontal state using the level 95, and the mounting 213 is set to the base point 0 mm on the support bar 211, and the front is set upward from here on according to the type of each articulator. According to the numerical value up to the reference point, a point at which the tip of the pointer 210 touches the skin is marked as a forward reference point. In this way, the position of the front reference point can be adjusted accurately and easily by moving the tip of the pointer 210 up and down or left and right.
[0051]
In the case where the adjustment is performed using the reference instrument 300, when the right central incisor (front tooth) is missing, the pointer 210 can be moved to perform the adjustment based on the left central incisor. When the upper central incisor is missing, it can be adjusted with reference to the dry wet line of the mouth corner and lower lip. In addition, the pointer 210 can be used to measure the face of the golden division ratio.
[0052]
(Second embodiment)
FIG. 6 is a diagram illustrating an incisor guiding plate 60 in the dental articulator according to the second embodiment.
[0053]
As shown in FIG. 6, the dental articulator according to the second embodiment differs from the first embodiment only in that an incisor guiding plate 60 is provided instead of the incisor guiding plate 40. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0054]
The incisor guide plate 60 includes a support portion 66, a main body frame 61, a base 42 pivotally supported by the main body frame 61, and left and right wings 43 provided with a side wing angle adjustment mechanism. The support portion 66 has its rear side attached to the front end of the lower jaw frame 20. The main body frame 61 is fixed on the support 66. As shown in FIG. 6A, the main body frame 61 has an inclination angle γ (1 as shown in FIG. 6A) with respect to a reference plane such that the base 42 is oriented (inclined) forward by the adjustment knob 64. It is preferable that the scale is provided at an interval of °). Further, as shown in FIG. 6B, the body frame 61 can adjust the inclination angle γ with respect to the reference plane so that the pedestal 42 is oriented (inclined) rearward by the adjustment knob 64. The pedestal portion 42 is provided with left and right wings 43 symmetrically as viewed from the front, and the left and right wings 43 can adjust the side wing angle with respect to the reference plane by adjusting knobs 65 respectively.
[0055]
The second embodiment is characterized in that the base portion 42 can rotate back and forth with respect to the main body frame 61 about the base point O. The base point O is a point (O in FIG. 5) where the incisor guiding rod 32 contacts the upper surface of the incisor guiding plate when the tooth contact area of the attached upper and lower jaw models is maximized.
[0056]
Also in the second embodiment, similarly to the first embodiment, since the upper surface of the base 42 can be oriented not only in the front but also in the rear, both the adjustment from O1 to A1 and the adjustment from O1 to R1 can be easily and accurately performed. The occlusal relationship between the upper and lower jaw teeth can be adjusted with high precision.
[0057]
(Third embodiment)
FIG. 9 is an overall perspective view of the dental articulator according to the third embodiment.
[0058]
As shown in FIG. 9, the dental articulator 80 according to the third embodiment is different from the first embodiment only in that an incisor guiding plate 81 is provided instead of the incisor guiding plate 40. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0059]
The incisor guiding plate 81 is a well-known incisor guiding plate, and includes a support portion 82, a main body frame 41, a base portion 42, and left and right wings 43. The support portion 82 extends only rearward from the main body frame 41, and the pedestal portion 42 can be inclined only forward.
[0060]
The third embodiment has a well-known configuration of the incisor guiding plate 81, but is characterized in that the bottom of the lower jaw frame 20 is supported at three points by three screws 23, 24, and 25.
[0061]
Similarly to the first embodiment, in the third embodiment, three points are supported by screws, so that each screw is turned up and down to correct the tooth row so that the plane of the tooth row substantially coincides with the horizontal plane. Can be. In addition, by turning the screw using a level, it is possible to easily correct the tooth row so that the plane coincides precisely with the horizontal plane.
[0062]
(Fourth embodiment)
FIG. 11 is an overall perspective view of the dental articulator according to the fourth embodiment.
[0063]
As shown in FIG. 11, the dental articulator 120 according to the fourth embodiment differs from the dental articulator 120 only in that a condylar ball guide path 31 ′ including a guide member 36 is provided instead of the condylar ball guide path 31. This is different from the first mode. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.
[0064]
The guide member 36 is provided at the rear end of the maxillary frame 30 ′, and forms a condylar ball guide path 31 ′ for guiding the condylar ball 22 back and forth. The rear wall of the guide member 36 on the rear end side is also thin, and the condylar ball guide path 31 'is extended rearward of the maxillary frame 30'. By rotating the guide member 36, the condylar ball guide path 31 'can be tilted forward or backward. After the guide member 36 is appropriately rotated, it is fixed by screws 37 and 39. .
[0065]
Also in the fourth embodiment, the condylar ball guide path 31 ′ is extended rearward of the maxillary frame 30 ′, and the condylar ball guide path 31 ′ is tilted forward or backward by rotating the guide member 36. Therefore, both the adjustment from O1 to R1 and the adjustment from O1 to A1 can be easily and accurately performed, and the occlusal relationship between the upper and lower jaw teeth can be adjusted with high accuracy.
[0066]
(Fifth embodiment)
12 and 13 are diagrams showing the shape of the end of the incisor guiding rod 32 on the incisor guiding plate side, and FIG. 12 (a) is a diagram viewed from the front in the case of the first embodiment, and FIG. 13B is a view from the side, FIG. 13A is a view from the front in the case of the fifth embodiment, and FIG. 13B is a view from the side.
[0067]
As shown in FIGS. 13 (a) and 13 (b), the fifth embodiment differs from the first embodiment only in that an incisor guiding rod 32 'having three sharp projections A, B and C is used. Is different. The incisor guiding rod 32 'is in contact with the upper surface of the incisor guiding plate 40 (the upper surface of the base 42) at the tips of the projections A, A and C. The tips of the convex parts a and c are in contact with a portion serving as an axis when adjusting the angle of the left and right wings 43 with respect to the base portion 42, that is, an intersection of the base portion 42 and the left and right wings 43, respectively. Can move along intersections. In addition, the tips of the projections a and c slide on the left and right wings 43 during lateral movement.
[0068]
With this configuration, it is possible to prevent displacement of the contact points of the teeth of the upper and lower jaws as compared with the case of FIG. That is, as compared with the case of FIG. 12, deviation of the angle and dimensions at the contact point can be prevented, and the components of each tooth can be adjusted more accurately. Since the tips of the projections a, b and c are sharp, there is no change in the height of the upper and lower arches, and it is possible to prevent teeth and teeth from becoming curled. In addition, the vertical intermaxillary distance between the upper and lower jaw frames can be accurately maintained. Further, even when the upper jaw is raised, the contact points of the teeth of the upper and lower jaws do not shift, and the adjustment can be performed with high accuracy.
The number of sharp projections at the end of the incisor guiding rod is not limited to three as shown in FIG. 13, but may be four or more.
[0069]
(Sixth embodiment)
The sixth embodiment differs from the first embodiment only in that a level 194 shown in FIG. 15 is used as a level. FIG. 15A is a diagram of the level 194 viewed from the front, and FIG. 15B is a diagram of the level 194 viewed from above.
[0070]
As shown in FIGS. 15A and 15B, the level 194 is a scale indicating a change in the position of the bubble 195 inside, and uses the position of the bubble when the plane of the tooth row is horizontal as a reference point X. And a measurement scale 196 having a concentric circle centered on the reference point X and a measurement scale 197 indicating the inclination direction of the plane of the tooth row.
[0071]
With this configuration, the position where the upper and lower jaw models are attached can be grasped by the measurement scales 196 and 197 with the case where the plane of the tooth row is horizontal as the reference point X. In addition, if the values of the measurement scales 196 and 197 are recorded and adjusted by rotating the screw to obtain the values, the adjustment can be more easily and accurately reproduced.
[0072]
【The invention's effect】
By using the dental articulator of the present invention, the occlusal relationship between the upper and lower jaw teeth can be adjusted with high accuracy and ease.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a dental articulator according to a first embodiment.
FIG. 2 is a right side view of the upper jaw frame in FIG. 1;
FIG. 3 is a diagram showing a state where the incisor guiding plate is attached to the lower jaw frame in FIG. 1 as viewed from below.
FIG. 4 is a view showing a state in which a holder of the upper and lower jaw models is attached in FIG.
FIG. 5 is a diagram schematically showing the relationship between the movement of the upper jaw frame and the arrangement of the incisor guiding plate and the incisor guiding rod.
FIG. 6 is an incisor guiding plate in the dental articulator according to the second embodiment.
FIG. 7 is a right side view of the maxillary frame in the articulator in which the rear wall of the posterior end of the condylar ball guide path is thin according to the first embodiment.
FIG. 8 is a diagram schematically showing the relationship between the front teeth of the upper jaw model and the front teeth of the lower jaw model.
FIG. 9 is an overall perspective view of a dental articulator according to a third embodiment.
10 (a) is a view of the relationship between the fitting jig and the condylar sphere in FIG. 2 viewed from below, and FIG. 10 (b) is a view schematically showing a state in which the side wall has moved.
FIG. 11 is an overall perspective view of a dental articulator according to a fourth embodiment.
12A and 12B are diagrams illustrating the shape of the end of the incisor guiding rod according to the first embodiment on the incisor guiding plate side, wherein FIG. 12A is a view from the front, and FIG. 12B is a view from the side. It is.
13A and 13B are diagrams showing the shape of the end portion of the incisor guiding rod according to the fifth embodiment on the incisor guiding plate side, wherein FIG. 13A is a diagram viewed from the front, and FIG. It is.
FIG. 14 is a view showing a different example of the fitting jig.
FIG. 15 is a diagram showing a level according to the sixth embodiment.
FIG. 16 is an overall perspective view of a reference device provided in the dental articulator.
[Explanation of symbols]
10 ... dental articulator, 20 ... lower jaw frame, 30 ... upper jaw frame,
21 ... leg, 22 ... condylar sphere, 31, 71 ... guide path of condylar sphere
40, 60 ... incisor guide plate, 32, 32 '... incisor guide rod
46, 66 ... support part, 41, 61 ... body frame, 42 ... base part,
44, 45, 64, 65: adjustment knob, 94, 194: level

Claims (9)

A dental articulator having a lower jaw frame for supporting a lower jaw model and an upper jaw frame for supporting an upper jaw model,
A pair of legs are provided at a rear end of the lower jaw frame, and condylar balls are provided on the legs so as to face each other. An incisor guidance plate is provided at a front end of the lower jaw frame. And
A guide mechanism for guiding the condylar sphere is provided at a rear end of the maxillary frame, and an incisor guiding rod is provided at an anterior end of the maxillary frame to contact and slide on the upper surface of the incisor guiding plate,
The incisor guide plate includes a main body frame, and a base portion pivotally supported on the main body frame,
A dental articulator in which the upper surface of the platform is configured to be capable of being oriented forward and backward. The incisor guide plate can be attached to the front end of the lower jaw frame in both front and rear directions of the incisor guide plate, so that the upper surface of the base is oriented both forward and backward. The dental articulator according to claim 1, wherein the dental articulator is configured to be capable of being used. In addition, it has a holder for upper and lower jaw models,
In the case where the tooth contact area of the upper jaw model and the lower jaw model attached to the holder is maximized, when the point where the incisor guiding rod comes into contact with the upper surface of the base is defined as a base point O, the base point O is the center. The dental articulator according to claim 1, wherein the base is rotatable back and forth with respect to the main body frame so that the upper surface of the base can be oriented forward and rearward. . The guiding mechanism of the condylar sphere comprises a guide path of the condylar sphere,
The dental articulator according to any one of claims 1 to 3, wherein a rear wall on a rear end side forming a guide path of the condylar sphere is thin. A lower jaw frame including a pair of legs at the rear end and a leg provided with the condylar sphere opposed to each other, and an incisor guidance plate at the front end,
An upper jaw frame comprising a guiding mechanism for the condylar sphere at a rear end thereof, and an incisor guiding rod which slides on an upper surface of the incisor guiding plate at an anterior end thereof,
A dental articulator with
A dental articulator in which the bottom of the lower jaw frame is supported at three points by three screws. In addition, it has a holder for upper and lower jaw models,
The dental articulator according to claim 5, wherein the holder comprises a level. 7. The scale according to claim 6, wherein the level is a scale indicating a change in the position of the bubble inside, and at least a concentric measurement scale centered on the position of the bubble when the bubble is horizontal. A dental articulator as described. The dental articulator according to claim 1, wherein an end portion of the incisor guiding rod has three convex portions. In addition, it has a reference device,
The reference device includes a support rod provided with a vertical position scale, a pointer supported to be vertically movable and rotatable with respect to the support rod, and a mounting fixed to the support rod,
By sliding and rotating the pointer, the position of the tip of the pointer can be freely adjusted,
The dental articulator of claim 1, wherein said mounting comprises a level.

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