JP3819358B2 - Articulator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
  The present invention relates to a dental articulator, and more particularly to an articulator capable of accurately reproducing the movement of a human upper and lower jaw outside the mouth.
[0002]
[Prior art]
  The articulator is a device that reproduces the three-dimensional arrangement of the upper jaw and the lower jaw. Using the tooth model attached to the articulator, the position of the upper and lower jaws and the mandibular movement are accurately reproduced outside the oral cavity, It is used for diagnosis and treatment.
[0003]
  The human lower jaw performs distinctive movements during chewing, pronunciation and swallowing. The movement that the lower jaw performs functionally is called functional movement. Movement performed on the boundary of the movement space of mandibular movement is called boundary movement, and the boundary movement includes mastication movement, that is, movement of the lower jaw when chewing food and polishing.
[0004]
  Since the boundary motion is a highly reproducible motion along the same trajectory, the motion of the boundary motion is a panda graph (outer mouth that records the mandibular forward and lateral motions as a continuous motion path in the horizontal and sagittal planes). Various techniques have been developed that can be obtained by using a drawing device) and reproduced on the articulator. Research has been conducted on improvements to articulators that accurately reproduce human jaw movement, and various inventions have been made. ing.
[0005]
[Patent Document 1]
          JP 2000-316880 A
[0006]
[Patent Document 2]
          JP-A-9-545
[0007]
[Problems to be solved by the invention]
  As described above, the articulator has been improved in various ways so as to reproduce the projected simulated mandibular movement of the sagittal plane and the horizontal plane as accurately as possible.
  However, it is very difficult to accurately reproduce the complex movements of the upper and lower jaws of humans with the articulator, and it is also difficult to obtain a prosthesis with high biocompatibility. . If the performance of the prosthesis is inferior, there is a risk of serious health effects, such as abnormal occlusion caused by abnormal occlusion and inability to chew food.
[0008]
  Accordingly, an object of the present invention is to provide an articulator that more accurately reproduces the movement of the upper and lower jaws of a human in three dimensions. Moreover, the subject of this invention is providing the articulator for preparation of a prosthesis with high biocompatibility.
[0009]
[Means for Solving the Problems]
  The above-described problems of the present invention can be solved by the following means (1) and (2).
(1) A maxillary arch (4) provided with a pair of left and right columns (13, 35) capable of adjusting the vertical position and a base that bridges and connects the tops of both columns near the tops of the pair of columns (13, 35). And the pair of struts (13, 35) Provided at the distal end of the lower arch (4), a base (25) provided at the distal end of the lower arch (3), and a distal end of the upper arch (4). Of the lower arch (3)Has a flip-up plate (25b)On the pedestal (25)With fixing screw (24)In the articulator having a rod (22) for adjusting the distance between the maxillary arch (4) and the mandibular arch (3) on which the tip pin (9) slides in contact, a pair of left and right vertical columns (13, 35) ) Condylar sphere parts (16, 17) provided at the tip of the condylar sphere (1) provided so as to be able to advance and retreat in directions facing each other, and the upper jaw for holding the condylar sphere (1) Bow (4) Horizontally extending rotating shaft (6c) mounted rotatably on the vertical side of the baseAnd a gauge (6e) for measuring a rotation angle of the rotation shaft (6c)A condylar frame (6) havingAfter adjusting the amount of rotation of the condylar frame (6), a knob (41) provided on the maxillary arch (4) for fixing the condylar frame (6) to the maxillary arch (4);In order to sandwich the condylar sphere (1) together with the condylar tract frame (6), a condylar tract frame (6) arranged parallel to the rotation axis (6c) of the condylar tract frame (6). A Bennett part (5) rotatably supported on the mounting surface (6a bottom surface) and a telescopic tip that is detachably mounted on the base side of the lower arch (3) and abuts the bottom surface of the upper arch (4) base Articulator comprising a maxillary arch support stick (40) provided with a part
[0010]
  In the articulator of the present invention, the condylar sphere parts 16 and 17 provided with the condylar sphere 1 at the tip can be tightened by interpolating the inner cylinder part 16 integrated with the condylar sphere 1 and the inner cylinder part 1. The outer cylinder part 17 is composed of an expanded outer cylinder part 17. After the outer cylinder part 17 with the inner cylinder part 16 inserted is attached to the upper column 35, the outer cylinder part 7 is fixed to the upper column 35. A configuration including a screw-type knob 19 for freely fitting and an inner cylinder part 16 and a knob 15 for allowing the inner cylinder part 16 to be fixed and freely fitted to the outer cylinder part 17 inside the outer cylinder part 17 is adopted. be able to.
[0011]
  In the articulator of the present invention, the Bennett part 5 includes a condylar ball contact piece 7 that is movable in the axial direction and serves to adjust the position of the condylar ball 1 and hold the condylar ball, and the condylar ball. Screwed into the abutment piece 7 and penetrated through one frame (Bennet frame 5b) of the Bennett part 5, the condylar ball abutment piece 7 is moved in the axial direction, and the condylar ball You may make it the structure which provided the movement amount adjustment members 30 and 32 which can adjust the movement amount of the said contact piece 7 to the said axial direction.
[0012]
(2) To make the condylar ball of the articulator move close to the human temporomandibular joint,
1) First,Claim 3Zero setting is performed in which the coordinate position where each part of the articulator is arranged on the three-dimensional coordinate axis composed of the XYZ axes and the way of contact between the parts are in the specified initial values. ,
2)(A) Horizontal direction on a straight line perpendicular to the straight line connecting both condylar spheres (1, 1) at zero settingIn the X-axis directionFrom the time of zero setting of the balance condyle ball (1)Amount of movement,(B) Horizontal direction on a straight line connecting both condylar spheres (1, 1) at zero settingIn the Y-axis directionFrom the time of zero setting of the balance condyle ball (1)Amount of movement(C) The balance-side condylar sphere (1) from the zero setting in the Z-axis direction in the vertical direction, which is the longitudinal direction of the column (35)Amount of movement, (D)Centering on the rotation axis (6c)Balanced sideCondylesRoadOf frame (6)From zero settingRotation angle and(E) The movement amount in the front-rear direction from the zero setting of the equilibrium condylar sphere (1) in (a) to (d) is adjusted.Adjusted by rotation of members (30, 32)Balanced sideOf the condyle ball contact piece (7)From zero settingTravel andBalanced sideOf the condylar frame (6)Y-axis centered on the rotation axis (6c)The axis parallel to the direction is the central axisWithin several set rotation angles of the balanced condylar ball (1) for articulator adjustmentRotation angle for the first predetermined angleByDecideBalanced sideThe condylar ball (1) is for Bennett parts (5)twoWalls (Bennet frame5a and(5d wall surface)Y-axis centered on the rotation axis (6c)The direction is the central axisSaidFirst predetermined angleTimesRolling angleAfter adjusting the gauge (6e) on the balance side, tighten and fix the knob (41) on the balance side.After adjusting the amount of movement of the condylar sphere parts (16, 17) in the Y-axis direction,Balanced sideThe position of the condylar sphere (1) is fixed by tightening the knob (15)And
3) One wall for sliding the condylar sphere of the balance-side Bennett part (5)ButInclining downward with respect to the reference plane (A) by the first predetermined angleOf the balance condyle (1)The condylar frame (6) is rotated, and the flip-up plate (25b) is inclined by a predetermined inclination angle with respect to the reference plane (A),Movement adjustment member(30) is rotated to extrude the condylar bulb contact piece (7) and is in contact with the condyle ball contact piece (7).Balanced sideMove the condylar ball (1),
4) The aboveBalanced sideAt the start of movement of the condylar sphere (1), the canine of the upper denture on the working side or a good contact state between the canine and the premolar with the lower denture and the tip pin (9) on the flip-up plate (25b) Modify the denture wax shape of the lower jaw so that it is in sync with the light contact state,
5)NextIn addition, the gap between the upper and lower tooth models between the upper and lower first premolars on the equilibrium sidesoBuried so that the distance between the upper and lower tooth models between the upper and lower first premolars on the equilibrium side does not change,
6) The upper arch support stick (40) is then pushed up and brought into contact with the bottom surface of the upper arch (4),Balanced sideBennet parts (5)Balanced sideThe combination of the condylar frame (6)Centering on the rotation axis (6c)Y-axis directionofPrevents the maxillary arch (4) from rolling during rotation around the rotation axis;
7) After that, the balance-side column (35) can be moved upward, and the wall for sliding the condylar sphere of the balance-side Bennett part (5).ButWith respect to the reference plane (A)Among the set rotation angles of the balanced condylar sphere 1 for articulator adjustmentSecond predetermined angleAfter adjusting with the gauge (6e) on the balanced side, tighten the knob (41) on the balanced side and fix it.The condylar ball (1) andBalanced sideWall surface for sliding condylar sphere of Bennett part (5)5a andFix the balance column (35) at the position where the 5d wall) contacts,Balanced sideBounce plate (25b)SaidSecond predetermined angleAt an angle corresponding toTilt and loosen the screw (24) for fixing the tip pin (9)Balanced sideMove and adjust so that the flip-up plate (25b) and the tip pin (9) are in contact.After that, tighten the screw (24) for fixing the tip pin (9) and fix it.
8) Further, the operations in 3) and 4) are necessary.For adjusting the articulator of the balanced condylar ball 1 for adjusting the articulator of the balanced condylar ball 1SettingrotationThe contact state between the canine or the canine of the upper denture on the working side and the equilibrium side of the maxillary denture with the lower denture of the premolar is always the contact between the tip pin (9) and the flip-up plate (25b) while repeating only the angle. The form of the denture (dental model) is corrected while confirming that it is synchronized.3A method for producing a prosthesis using the described articulator.
[0013]
  Definitions of main terms used in the present specification are as follows.
  During the process of anterior mandibular movement, the mandibular head advances toward the joint nodule in the mandibular fossa and descends via a joint disc that follows the form of this nodule. At this time, the projection of the movement path indicated by the mandibular head is called a sagittal anterior condylar path. The angle formed by the sagittal anterior condylar path and the horizontal reference plane is called the sagittal anterior condylar path inclination angle, and the average is said to be 41 degrees for the edentulous and 29 degrees for the edentulous jaw. . Further, a projection of the movement of the lower jaw on the non-working side during the lateral movement onto the sagittal plane is called a sagittal lateral condyle path.
[0014]
  The sagittal plane is a plane parallel to the sagittal suture of the skull that divides the body left and right and is vertical.AndThe plane intersects the horizontal plane and the frontal plane at a right angle. Further, the Bennett angle is an angle formed by the direction of the non-working side movement path and the mid-sagittal plane. This is also called the Bennett angle, and the rotation-like lateral movement of the mandibular head on the working side is called Bennett movement, and it is also the angle that the non-working side mandibular head forms a mid-sagittal plane in the horizontal plane during lateral movement.
[0015]
  The working side is the side on which the lower jaw moves during lateral movement, and is called in this way because food is collected and crushed on the working side dentition during the chewing movement. Further, the lateral movement refers to a rotational movement of the entire lower jaw that occurs when one lower jaw head rotates in the temporomandibular joint and the other lower head moves to the front lower inner side. The side on which the lower jaw moves during this lateral movement is called the working side, and the opposite side is the non-working side.Or balanced sideCall it. Lateral movement is an irregular turning movement with slight movement of the lower jaw to the working side. During side exerciseInThe working side of the mandibular head rotates slightlyOutsideThis outward movement that moves to the side is called Bennett movement.
[0016]
  Also, the cusp fitting position is up and downchinThe opposite cusp and slope of the dentition are in contact with each other at the maximum area, and the cusp closely fits and is in a stable state.The maximum cusp insertion position is where the upper and lower teeth are in contact with each other at the maximum area. The state of meshing.
[0017]
  The median line means the midline of the maxilla that is stuck to the skull, and it is an extension of the straight part of the median raphe of the palate that is the fusion part of the left and right maxilla.
[0018]
  The explanation of the above technical terms was mainly based on the book “Occlusion Study Dictionary” by Shoya Hobosu (published in 1983).
[0019]
DETAILED DESCRIPTION OF THE INVENTION
  Embodiments of the present invention will be described with reference to the drawings.
  A bird's-eye view of the articulator of the present embodiment is shown in FIG. 1, and a bird's-eye view from the front is shown in FIG. The articulator is composed of a mandibular arch 3 that supports the lower teeth of the prosthesis, and an upper arch 4 that supports the upper teeth of the prosthesis. The vertical spacing is maintained by a pair of base struts 13R, 13L and a rod 22 that can be extended in front of the maxillary arch 4 and a tip pin 9 that is fixed to the lower end of the rod 22. An incisal table 25 and a tip pin (incisal pin) 9 are provided at the tip of the mandibular arch 3. The incisal table 25 is provided with a defined position setting plate 25a with which the tip of the incisal pin 9 abuts, and on both sides thereof, a flip-up plate 25b that can be tilted around the end of the defined position setting plate 25a. Upper columns 35R and 35L provided so as to be vertically movable are provided on tops of the pair of base columns 13R and 13L. The upper columns 35R and 35L are fixed by the knobs 34R and 34L after the vertical position adjustment.
[0020]
  The longitudinal direction of the left and right upper columns 35R, 35L is taken as the X axis, the hypothetical line perpendicular to the X axis connecting the position of the condyle sphere 1 described later on the upper columns 35R, 35L is taken as the Y axis, The longitudinal direction (vertical direction) of 35L is taken as the Z axis.
[0021]
  The pair of upper struts 35R and 35L are bridged via the base of the maxillary arch 4, the Bennett part 5, the condylar path frame 6 and the condylar ball 1, the inner cylinder part 16, and the outer cylinder part 17.
  A Bennet part 5 and a condylar path frame 6 are disposed on the vertical side surface of the base of the maxillary arch 4.
[0022]
  Further, as shown in FIG. 3, the condylar sphere 1 (corresponding to a human mandibular head) attached to the upper struts 35R and 35L is fixed to the distal end of the condylar sphere 1 to attach the upper struts 35R and 35L. The inner cylinder part 16 is integrally formed with the inner cylinder part 16 penetrating and supported in the horizontal direction. The inner cylinder part 16 is provided so as to penetrate inside the outer cylinder part 17. It is fixed to the cylinder part 16.
[0023]
  The outer cylinder part 17 is provided with a notch 17 a in the longitudinal direction thereof, and the notch 17 a portion is deformed by tightening the knob 15, and the inner cylinder part 16 is firmly tightened by the outer cylinder part 17. Thus, the position of the condylar sphere 1 is fixed.
[0024]
  A combination of Bennett parts 5R and 5L (hereinafter simply referred to as Bennett part 5) and condylar frame 6R and 6L (hereinafter also simply referred to as Condylar frame 6) (Bennet part 5 and condyle FIG. 4, FIG. 5 and FIG. 6 show a combination of the road frame 6 (sometimes referred to as a condyle housing part). 4 is an exploded view showing the assembly procedure of the condylar housing part as seen from the front of the articulator, and FIG. 5 is an exploded view showing the assembly procedure of the condylar housing part as seen from the side of the articulator. )) And an arrow view from the direction of arrow A (FIG. 5B), and FIG. 6 is a bottom view of the condylar housing part.
[0025]
  The Bennet part 5 is composed of a longitudinal Bennet frame 5a on the upper surface side and a small screw 30 and a large screw 32 on the side of the rear Bennet frame 5b, a bottom Bennet frame 5c, and a side surface side. The attached Bennett frame 5d is provided. The condyle sphere 1 is designed to have a size that simultaneously contacts the inner wall surfaces of the Bennett frames 5a, 5c, and 5d. Since these inner wall surfaces move while the condyle sphere 1 is in contact, they may be called sliding surfaces.
[0026]
  The condylar frame 6 rotatably supports the Bennet part 5, and has a bottom surface in contact with the top surface of the Bennet frame 5a, and a side frame 6b provided in a direction perpendicular to the condylar frame body 6a. A rotation shaft 6c rotatably inserted into an engagement hole (not shown) provided on the vertical side surface of the maxillary arch 4 provided on the side frame 6b and a condylar path frame 6 provided on the side frame 6b. It consists of a gauge 6e that measures the rotation angle of.
  Further, a knob 41 provided on the maxillary arch 4 is provided in order to fix the condylar frame 6 to the maxillary arch 4 after adjusting the rotation amount of the condyle path frame 6.
[0027]
  A screw part 5e projecting from the upper surface of the long Bennet frame 5a of the Bennet part 5 is inserted into a hole 6g penetrating the central part of the condylar frame body 6a from the back side of the condylar frame body 6a. By allowing the screw part 5e to be tightened with the screw 6d, the Bennett part 5 is rotatably attached to the condylar path frame 6. In addition, a condylar sphere pressing screw 8 is inserted into the rear Bennet frame 5b of the Bennet part 5 so as to be movable back and forth with a double screw (small screw 30 and large screw 32). Since the condylar ball abutting piece 7 is provided at the tip of the condylar sphere pressing screw 8, the screw 8 is screwed onto the double screws 30 and 32 so that the condylar sphere abutting piece 7 is brought into a specified position. It can be adjusted to hold.
[0028]
  Also, as shown in FIGS. 4 to 6, the spring frame 12 is attached to the condylar path frame 6. In the spring frame 12, a rotatable sleeve 18 is inserted into a hole 12a (FIG. 4) provided in the base thereof, a bolt 21 is inserted into the sleeve 18, and the bolt 21 is attached to the back surface of the condylar frame body 6a. Fix it. Since the spring 20 is wound around the outer periphery of the sleeve 18, the spring frame 12 is urged around the sleeve 18 in the direction of arrow A (FIG. 6).
[0029]
  The condylar ball abutting piece 7 is provided at the tip of the condylar ball pressing screw 8, and the condylar ball pressing screw 8 is screwed in from the inner side of the rear Bennet frame 5 b of the Bennet part 5. The ball contact piece 7 is inside the Bennet part 5Condylar sphere 1 attached to upper strut 35Can be brought into contact with(The condyle ball contact piece 7 and the condyle ball pressing screw 8 may be integrated). Further, as shown in FIG. 4, the spring frame 12 has a bent portion 12 b as shown in FIG. 4, and the condylar bulb 1 is sandwiched between the bent portion 12 b and the condylar bulb contact piece 7. The condylar sphere 1 is pressed against the wall surface in the three directions of the Bennett frames 5a, 5c and 5d and is stably held between the Bennett part 5 and the condylar path frame 6 (FIGS. 5 and 6).
[0030]
  Further, since the condyle sphere 1 is held between the condyle sphere abutment piece 7, the spring frame 12, and the wall surfaces of the Bennett frames 5a, 5c, 5d, the base portion of the maxillary arch 4 between the left and right apex columns 35R, 35L. Is bridged.
  Thus, the maxillary arch 4 is formed around the condylar ball 1 sandwiched between the condylar ball contact piece 7 and the spring frame 12.Centering on the rotation axis 6cRotate around Y axisRollBecome free.
  The condyle ball contact piece 7 is formed in the space formed by the wall surfaces 5a, 5c, 5d of the Bennett frame 5.ButAs shown in FIG. 5, the condylar bulb contact piece 7 is cylindrical after the cylindrical condylar bulb pressing screw 8 having a thread on the outer peripheral surface as shown in FIG. 5 is attached to the Bennett frame 5b. Screwed to the tip of the condylar ball pressing screw 8. A condylar sphere pressing screw 8 is inserted inside, and a large screw 32 having a hollow shaft screw 32a provided with a thread on the outer peripheral surface, and a screw member that penetrates the hollow shaft screw 32a and protrudes from the large screw 32. 8 is provided with an advancing machine screw 30 provided with a female screw (not shown) on the inner peripheral surface to which the front end portion of 8 is screwed.
[0031]
  Large screw 32By rotating leftThe small screw 30 is used when the condyle ball contact piece 7 is retracted by a predetermined amount with respect to the condyle ball 1.By rotating to the rightThis is used when the condylar ball contact piece 7 is advanced by a predetermined amount with respect to the condylar ball 1. The forward movement of the large screw 32 and the backward movement of the small screw 30 can be determined by the direction of the threads of the outer peripheral surface of the hollow shaft screw 32a of the large screw 32 and the internal thread of the inner peripheral surface of the small screw 30.
[0032]
  In the articulator of the present embodiment,Like above-mentionedThe condyle sphere 1 that contacts the condyle sphere contact piece 7 can be pushed forward by rotating the machine screw 30 clockwise. The condylar sphere 1 can be retracted by rotating the large screw 32 counterclockwise. The condylar sphere 1 is always urged backward (small screw 30 and large screw 32 side) by a spring frame 12 urged by a spring 20. That is, by rotating the large screw 32 and the small screw 30 by 360 ° in the left-right direction, the condyle ball contact piece 7 can be moved forward and backward by 1 mm, respectively. By moving the condyle ball contact piece 7 by 1 mm, the condyle ball 1 biased by the spring frame 12 moves forward and backward, respectively. The longitudinal Bennet frame 5a is provided with a gauge 5f for measuring the moving distance of the condyle ball contact piece 7 (FIG. 5).
[0033]
  Further, the condylar sphere 1 can be held at a “zero setting” position, which will be described later, by rotating the large screw 32 to the right and holding it with a finger as it is and rotating the small screw 30 counterclockwise.
[0034]
  The Bennett part 5 can be rotated around the condylar frame body 6a with the screw portion 5e provided in the long Bennet frame 5a inserted into the engagement hole 6g of the condyle frame body 6a as a rotation axis. As shown in the view of the assembly of the Bennet part 5 and the condylar path frame 6 (condylar path housing part) from below, the small screw 30 is rotated clockwise to advance the condylar ball contact piece 7. In this case, the Bennett frame 5a is lateral (as the Bennett angle) from the initial position in FIG.ofInward~ sideThe angle can be changed in the range of 0 ° to 35 ° with respect to the X axis (toward the center of the articulator) (FIGS. 7A and 7B), and similarlySideThe angle can be changed from 0 ° to 45 ° with respect to the X axis toward the outside (the direction away from the center of the articulator) (FIGS. 7A and 7C). These angle changes with respect to the X axis can be measured by the gauge 6f (FIG. 1) of the condylar frame 6.
[0035]
  The rotation axis of the condylar path frame 6 that is rotatably inserted into the engagement hole on the side surface in the vertical direction of the maxillary arch 4 in both cases where the condylar ball contact piece 7 is advanced and retracted. Condylar housing parts with 6c as the central axis5, 6Can be rotated downward to 90 ° without interfering with any other parts with the Y axis as the rotation axis, and can also be rotated upward to 90 °.That is, it can rotate 360 degrees.The side frame 6b of the condylar path frame 6 that is in contact with the vertical side surface of the maxillary arch 4 is provided with a rotation angle gauge 6e having a rotation axis 6c as a rotation center.
[0036]
  In the articulator according to the present embodiment, the condyle sphere 1 can thus be moved in the range of 5 mm backward and 23 mm forward, 15 mm upward, and 5 mm laterally (Y-axis direction).
[0037]
  In addition, the position of the condyle sphere 1 in the space can be arbitrarily set within the determined range, and the arbitrarily set positions are the rotations of the gauges 5f, 6e, 6f, the small screw 30 and the large screw 32. Since it can be measured in quantity, it can be easily returned to the “zero setting” position, and highly reproducible denture preparation and denture repair can be performed very efficiently.
[0038]
  Further, the support structure for the condyle sphere 1 comprising the maxillary arch 4, the Bennet part 5 and the condylar path frame 6.When,The maxillary arch support stick 40, which will be described later, makes it possible to change the angle during movement from an arbitrary position during movement of the condylar sphere 1 without rolling the maxillary arch 4. As a result, it is possible to provide a canine guideway and other tooth guideways that synchronize with the movement of the temporomandibular joint based on data from the jaw movement inspection device described later, and can perform smooth jaw movement without a sense of incongruity. It becomes possible to produce a prosthesis that does not impose a burden on the like.
[0039]
  Further, the outer surface of the distal end portion 4 a of the upper arch 4 has a shape that is gently bent inward in the vertical direction, and this shape has the same curved surface as the side surface that contacts the upper arch 4 of the guide member 23. A guide member 23 that vertically adjusts the rod 22 and a screw 24 that fixes the rod 22 after the vertical adjustment is provided, and a tip pin that abuts the incisal guide table 25 at the tip at the lower end of the rod 22 9 is connected.
[0040]
  By adjusting the length of the rod 22 when the tip pin 9 abuts on the insisal guide table 25, the position of the rod 22 can be determined on the space of the maxillary arch 4 and the rod 22 stands upright. Even if the height of the rod 22 is changed, the side surface in contact with the outer surface of the distal end portion 4a of the maxillary arch of the member 23 is a part of an arc having a radius centered on the center point of the condyle sphere 1. The positional relationship between the front end of the front end pin 9 and the specified position setting plate 25a in the front-rear direction (X-axis direction) is always constant.
[0041]
  A height position at which the tip of the tip pin (inside pin) 9 abuts against the specified position setting plate 25a is measured by a gauge 23a provided on the side surface of the guide member 23 provided at the tip of the maxillary arch 4. After adjusting, the screw 24 is fastened to the guide member 23 at an appropriate height position.
[0042]
  The incisal table 25 is provided with flip-up plates 25bL and 25bR for mirror surfaces on both sides of the center specified position setting plate 25a and the specified position setting plate 25a.
[0043]
  8 and 9Jump toLifting plates 25bL, 25bRIn the inclination angle ofA specified plane (the plane formed by the maxillary arch 4Plane parallel toFor)SettingCondylar path angle (B: angle read with gauge 6e)The angle (E) calculated by the TNM system (described later) so as to correspond toWhen set, occlusal guidance with respect to the plane (a plane parallel to the plane formed by the maxillary arch 4) at an arbitrary occlusion point (for example, the meshing point of the corresponding teeth of the canine of the upper jaw model and the lower jaw model) (C1) Road angle (D)An angle equivalent to the condylar tract angle (B) set with respect to a set plane (a plane parallel to the plane formed by the maxillary arch 4)(Usually, the occlusal guideway angle (D) isSettingPlane (the plane formed by the maxillary arch 4)Plane parallel toFor)SettingAn angle equivalent to the condylar path angle (B) is given. ), The angle (E) calculated by the TNM system (described later) is the inclination angle of the flip-up plates 25bL and 25bRSubstitute for (I) (read by scale 25bf attached to flip-up plates 25bR and 25bL)use.As a method therefor, the condylar frame 6R or 6 on the equilibrium sideLAdjust with gauge 6e so that condylar tract angle (B) can be setAfterThe balance-side flip-up plate 25bR or 25bL is adjusted to form an inclination angle of angle (E), and the balance-side Bennet part 5 is adjusted to the side (the Bennet angle as the Bennett angle).InDirection (toward the center of the articulator) about 8-9 with respect to the X axis° timesTurn. This is centered on the center point of the working side condylar sphere 1, and when the equilibrium side condylar sphere 1 moves at a certain distance, the inner surface of the Bennett frame 5d is in a position parallel to the X axis. Since the condyle ball 1 and the Bennett frame 5d interfere with each other and cannot move smoothly, the Bennett frame 5d is rotated about 8 to 9 ° inward (toward the center of the articulator) with respect to the X axis. . The working side condylar sphere 1 without disturbing the movement of the balance side condyle 1R or 1LLOr 1RIs fixed to the top, bottom, front, back, left and right, restricted to rotational movement only, and the balanced condylar sphere 1R or 1L is placed in the front lower inwardGlidingBy moving, an arbitrary occlusal point (C1) has an occlusal guide path angle (D) at the same angle as the condylar path angle (B) defined with respect to the plane (plane formed by the maxillary arch 4). It is possible to draw a locus (point C2). Balanced condylar sphere1R or 1LFIG. 8 and FIG. 9 show the coordinate point (C2 ') when is moved downwardly from the coordinate point (C1') by a condyle path angle (B). 8 and 9, the left condylar sphere 1L is the working side.
[0044]
  Also, the working side condylar ball 1L(For simplicity, the condylar ball 1L is the working condylar ball)Is displaced posteriorly and laterally, the angle and distance of the displacement is determined by the gauge 5fL provided on the large screw 32L and the longitudinal Bennett frame 5aL and the gauge 6eL on the side frame 6bL of the condylar frame 6L. After adjusting the inner cylinder part 16L so that the working side condylar sphere 1L comes into contact with the attached Bennett frame 5dL on the side of the Bennett frame 5L without difficulty. The inner cylinder part 16L is fixed by tightening the knob 15L on the working side. Thereafter, the working side condylar ball 1L is fixed vertically, front and back, and left and right, and is regulated so that only the rotational movement is possible. By moving the occlusal point (C1) to the same angle as the condylar tract angle (B) defined with respect to the plane (A)DegreeIt is possible to draw a motion trajectory having an occlusal guidance path angle (D). In this way, the flip-up plate 25bR or 25bL has a condylar path angle (B) with a specified occlusal guide path angle (D) with respect to a specified plane (A) during movement of an arbitrary occlusal point (C1). This is used when regulating under ().
[0045]
  The operation of the articulator having the above configuration will be described.
(1) “Zero setting”
  Zero setting means that the small screw 30 with respect to the X axis of the maxillary arch 4 and the mandibular arch 3 is tightened counterclockwise and the large screw 32 is constricted clockwise. Comes into contact with the condylar bulb contact piece 7 and the wall surfaces of the Bennett frames 5a, 5b, 5c, the specified positions of the tip pin 9 and the specified position setting plate 25a of the incisal guide table 25 match, The standard position setting line 4f when the height reference is set matches the standard position line 23b of the guide member 23,The tip of the tip pin 9 is on the upper surface of the specified position setting plate 25a of the incisal guide table 25.The contact state is called zero setting. That is, in using the articulator, each part of the articulator has an initial value in which the arrangement position is defined on the three-dimensional coordinate axis composed of the XYZ axes, and the manner of contact between the parts is defined. The initial value is called zero setting.
[0046]
  The significance of such zero setting will now be described.
  When a technician creates a prosthesis on the articulator, first attach the patient's tooth model in the maximum cusp fitting position (the upper and lower teeth are in contact with each other at the maximum area and are in close contact with each other) After that, it is an abutment tooth (a model in which teeth formed by grinding by a dentist are cast (the part of the tooth to be produced that is taken into the tooth model and called the abutment tooth), and from now on. The shape correction work is carried out while building or grinding the wax on the dental model for which a prosthesis is to be produced. However, there may be a situation where the zero setting must be destroyed.
  The dental model refers to a model in which gypsum is usually poured after an intraoral mold is obtained, and the prosthesis refers to a dental mold of a patient's crown product manufactured based on the model.
[0047]
  Then, after the preparation of the crown shape, such as the formation of the side guide using wax, is completed, the occlusal contact is confirmed once again at the maximum cusp fitting position. At this time, it is easy and accurate. If the upper and lower jaw tooth model cannot be placed after the articulator is returned to the zero setting position, the tooth contact at the cusp mating position of the tooth under preparation is the occlusal contact position at the maximum cusp mating position of other teeth (upper and lower teeth As in the case of contact), it is impossible to confirm that it has been produced, and the final prosthesis may be produced with uncertain occlusal contact.
[0048]
  Thus, the ability to reproduce the zero setting easily and accurately is very important in the production of the prosthetic crown shape.
  In addition, the height difference of the occlusion with other teeth (molars, molars) at the maximum intercuspal position must be made within 12 μm, but in order to satisfy such a requirement, the zero setting is an error. It must be possible to set it up.
[0049]
(2) “Y-axis direction movement of condylar sphere 1”
1) For example, the lower arch 3 itself is moved forward with respect to the upper arch 4 to the right (in the direction of arrow A in FIG. 1).BesideWhen moving, the left and right inner cylinder parts 16 and outer cylinder parts 17(The reason why L and R are not distinguished between the inner cylinders 16L and R and the outer cylinders 17L and R)IsThis is to make these two become one part. )AbutAnd the left and right inner cylinder parts 16 and outer cylinder parts 17 are tightened with a knob 15 so that they do not slide.After confirming that the right condylar ball 1RButOn the upper strut 35R of the lower arch 3So as not to moveLoosen the knob 19R that tightens the outer cylinder part 17R,And right condylar ball 1RThe knob on the side surface of the upper column 35L into which the threaded portion 17bL of the outer cylinder 17L with the notch 17aL and the threaded portion 17bL inserted into the left condylar sphere 1L and the threaded portion 17bL is screwed. 15LLoosen and expand the notch 17aL of the outer cylinder part 17L, and the inner cylinder part 16LAfter the mandibular arch 3 itself is moved by a predetermined amount toward the right side (in the direction of arrow A in FIG. 1) with respect to the upper arch 4, the knob 19R is tightened to tighten the right condylar sphere 1R. Is fixed to the upper column 35R of the mandibular arch 3 so that the right condylar sphere 1R and the left condylar sphere 1L are in contact with the wall surfaces of the left and right Bennett frames 5a, 5c, 5d, respectively.The knob 15L is tightened again to fix the outer cylinder part 17L and the inner cylinder part 16L.
2)ThisAt this time, the left and right struts 13L and 13R are connected by the torsion bar 2 so that the distance between the left and right condylar balls 1L and 1R does not move.
[0050]
  Because there is a torsion bar 2, the maxillary arch 4 is moved to the left and right condylar balls 1R1LOpen upward from the centerRotate asSince the condyle housing parts 5 and 6 are received by the torsion bar 2 by the operation, it is easy to attach and remove the upper and lower jaw models to and from the upper and lower jaw arches 3 and 4.
[0051]
  In the conventional articulator, the condylar ball 1 itself is not moved in the Y-axis direction, but is applied to the condylar ball 1 in the protective frame corresponding to the Bennett part 5 of the present invention having a wall surface surrounding the condylar ball 1. The condylar sphere 1 is moved indirectly by moving the position restricting member in contact with the condylar sphere 1 by adjusting a screw attached to the contacting position restricting member. For this reason, a right screw is usually used as a screw for moving the position restricting member of the protective frame of the pair of left and right condylar spheres 1, but when the screw is a right screw, the left position restricting member is loosened. As a result, rattling frequently occurs in the lower arch 3 and the upper arch 4.
  In the present embodiment, the condyle sphere 1 itself is moved in the Y-axis direction, so that the lower arch 3 and the upper arch 4 do not start to rattle unlike the prior art.
[0052]
(3) “Movement of the condylar sphere 1 in the front-rear direction”
  In order to move the conventional articulator condylar ball 1 back and forth, a socket is inserted behind the protective frame of the condylar ball 1 to move the condylar ball 1 back and forth, or a screw is attached to the back of the protective frame of the condylar ball 1. There was a method of embedding and moving the screw back and forth.
[0053]
  However, in the former case, the socket cannot be stopped at an arbitrary position (1/10 mm-unit regulation ability), and in the latter case, the screw can be easily and accurately returned to the original position by rotation.thingIt was difficult to reproduce (zero setting) the maximum cusp fitting position on the technical operation after moving the condylar ball 1.
[0054]
  In order to solve the drawbacks of these conventional articulators, in the present embodiment, the condylar sphere 1 is pushed backward from the front and lower side by the spring frame 12 and the spring 20 as shown in FIGS. The condylar ball 1 can be moved backward by turning the large screw 32 counterclockwise as in the above, and can be moved forward by turning the small screw 30 clockwise, And,The Y axis direction around the rotation axis 6c is used as the rotation axis for the condylar frame 6 and the Bennett part 5.Rotate 360 degreesAs possibleA hollow shaft screw 32 a is provided on the condylar sphere pressing screw 8 and the large screw 32.
[0055]
  Further, when the Bennet part 5 and the condylar frame 6 are inclined forward as described above.Centering on the rotation axis 6cY axisdirectionAs a rotation axis, the sliding surfaces of the frames 5a to 5d of the Bennet part 5 can be varied from the horizontal position (0 °) to 90 °, and the Bennet frame 5 is lateral (Bennet angle) as shown in FIG. As far as inward (toward the center of the articulator) can be varied up to 35 °, and similarly to the outside (away from the center of the articulator) can be varied up to 45 °.
[0056]
  Since the condylar ball 1 can be displaced backward, the following prosthesis for the patient can be accurately produced.
  Usually, the working side condyle does not move during lateral movement of the temporomandibular joint, but some people move backward. For example, the canine on the working side is corrected by moving the balanced condyle on the basis of the maximum intercuspal position (ICP) of the working side condyle that does not move during normal operation. When moving, the working side condyle is moved to the posterior position, and then the working side, for example, the canine is moved on the working side by a method exemplified by formulas (1) and (2) described later in the normal state. to correct. At this time, correction work can be performed only with the articulator of the present embodiment in which the condylar ball 1 can move backward.
[0057]
(4) "Balanced sideCondylar frame 6R (the right side is the equilibrium side)Change the angle to a gentle slope "
  As shown in FIG.The gauge on the side frame 6bR of the condylar frame 6R so that the angle (for example, 52 degrees with respect to the plane formed by the maxillary arch 4) when moving from position (a) to (b) (see FIG. 12) Set 6eR,After the condylar sphere 1R is moved forward to an arbitrary position while rotating the small screw 30R to the right and bringing it into contact with the longitudinal Bennet frame 5aR and the side-attached Bennet frame 5dR,A gauge 6eR on the side frame 6bR of the condylar frame 6R so as to have an angle (for example, 39 degrees with respect to the plane formed by the maxillary arch 4) when moving from the position (b) to the position (c) (see FIG. 12). From the angle when moving from position (a) to position (b)When trying to change to a gently inclined surface, as shown in FIG.The running point will be separated and a gap S will be created.Long Bennett frame 5aRBottom surface (sliding surface) and condylar sphere 1RAbuts against the bottom surface of the top surfaceEndIn the conventional articulator movement, from the front of the maxillary arch 4ArticulatorIn the tilt when seenRight side of maxillary arch 4 from left sideResulting in a lower slope, as a resultDown right, right side of maxillary arch 4The distance between the upper and lower tooth models in the mouth becomes smaller than the actual movement in the oral cavity, and the canine guideway and other teeth (molars, molars, etc.) guideway angle are set to a gentler slope than the actual condylar path angle. It will be produced.
[0058]
  For this reason, an excessive burden is placed on the temporomandibular joint during jaw movement.
In order to prevent this, as shown in the side view (FIG. 11 (a)) and the rear view (FIG. 11 (b)) of the articulator of FIG. 10 (c) and FIG.RAfter moving forward to an arbitrary position, the maxillary arch 4 and the condylar ball 1 moved forward to an arbitrary positionR'sVertical position relationshipBefore moving forward andDon't changeIn order to prevent the maxillary arch 4 from tilting left and right when looking at the articulator from the front (front view)A maxillary arch support stick 40 was attached to the articulator.
[0059]
  The maxillary arch support stick 40 is detachably attached to one of the left and right installation portions on the side surface on the back side of the base of the lower arch 3, but in reality, on the side to be moved forward and downward (balance side). Install. The grasping portion 40a of the maxillary arch support stick 40 rotates to raise and lower the distal end portion 40b.And contact with the maxillary arch 4Can.
[0060]
  Condylar housing parts5, 6When the inclination angle is changed to a gentle slope, the sliding point on the bottom surface (sliding surface) of the longitudinal Bennet frame 5aL or 5aR and the upper surface of the condylar ball 1L or 1R is separated.After the gripping portion 40a of the maxillary arch support stick 40 is rotated, the tip end portion 40b is moved up and down and brought into contact with the maxillary arch 4;After the knob 34R or 34L is loosened and the upper support 35R or 35L is pushed upward so that the bottom surface (sliding surface) of the longitudinal Bennet frame 5aR or 5aL and the sliding point of the upper surface of the condylar sphere 1R or 1L come into contact with each other, The knob 34R or 34L is tightened to fix the upper column 35R or 35L and the lower column 13R or 13L.
[0061]
  When a human bites something with the right upper and lower teeth, the left and upper left teethThingsWhen biting, there is a gap between the right and left upper and lower molar cusps on the opposite side. This is called posterior separation of the molars, and it is considered physiologically indispensable to protect the teeth from horizontal lateral occlusal pressure during jaw movement (mastication, swallowing, pronunciation movement). The upper and lower teeth on the biting side are called the working side, and the upper and lower teeth on the opposite side where the molar teeth are separated are called the non-working side (equilibrium side).
[0062]
  As described above, the side on which humans bite food with upper and lower teeth is called the working side, and the condylar ball corresponding to the condylar head on the working side (the origin when moving the articulator laterally), In principle, it is said that it rotates and does not slideCondylar sphere) The maxilla at a position as far as possible from 1L or 1R and as close as possible to the condylar sphere corresponding to the balanced condyle (condylar sphere that moves greatly when the articulator is moved laterally) 1R or 1L Attach bow support stick 40By reasonThe condylar sphere 1R or 1L corresponding to the balance-side condyle can be stably supported from below.
[0063]
  By preparing canine guideway and other tooth guideway in this way, jaw movement inspection device machine (GADIMA's CADIAX system)And TNM system (described later)It is possible to provide canine guide paths and other tooth guide paths synchronized with the movement of the temporomandibular joint based on the data.
[0064]
(5) “Setting the sagittal anterior condylar inclination angle when the condylar sphere moves forward and downward”
  The condyles during mastication move in a complex motion that moves back and forth while moving forward and downward. Therefore, it is desirable that the movement of the maxillary arch 4 and the mandibular arch 3 when moving the condylar sphere to the front and lower side of the articulator can reproduce the mandibular and mandibular chewing movements as faithfully as possible.
[0065]
  The sagittal anterior condylar inclination angle during mastication is as described above.NaIn the toothed jawAbout 33 °However, the sagittal anterior condylar inclination angle is different between races, and there are individual differences even in the same race.
[0066]
  Accordingly, in order to produce a prosthesis having a high biocompatibility, the sagittal anterior condylar inclination angle from an arbitrary position during the movement of the condylar sphere 1 which is first possible with the articulator of this embodiment in FIG. Indicates the angle when is changed. As shown in FIG. 12, the sagittal anterior condylar inclination angle is 52 °.(Rotation angle corresponding to the first predetermined angle of claim 4)To 39 °(Rotation angle corresponding to the first predetermined angle of claim 4)To change from 39 ° to 22 °, the following procedure is used. At this time, as shown in FIG.Parallel to maxillary arch (4)Set inclination angles 52 °, 39 °, and 20 ° with respect to plane (A)Do.
[0067]
  Using the articulator having the above-described configuration, data is obtained by a well-known method using a jaw movement inspection apparatus (CADIAX COMPACT manufactured by GAMMA) described below, and the TNM system is based on this data.(Described later)By this, it is possible to provide a canine guideway and other teeth (such as a large premolar) guideway synchronized with the movement of the temporomandibular joint. In addition, the occlusion of the canine is synchronized with the jaw movement by synchronizing the sliding angle of the balanced condyle with respect to a certain reference plane (A) and the fitting guide path angle of the canine, so that both the temporomandibular joint and the canine There will be no burden.
[0068]
(6) “Right side (direction A)And opposite directionAdjusting the articulator during lateral movement to the
1) If “zero setting” is performed and the working side condylar sphere 1L does not deviate during lateral movement, the “zero setting” state is maintained, but the working side condylar sphere 1L is displaced backward and laterally. In this case, the deflection angle and distance are put into the gauge 5fL on the side face of the large screw 32L and the longitudinal Bennet frame 5a and the gauge 6eL on the side face frame 6bL of the condylar path frame 6L. Loosen and adjust the inner cylinder part 16L so that the working side condylar sphere 1L comes into contact with the attached Bennet frame 5dL on the side of the Bennet part 5L without difficulty, and tighten the working knob 15L to fix the inner cylinder part 16L. To do. Then the equilibrium side (rightSide condylar housing parts (combination of Bennet part 5R and condylar frame 6R) and condylar ball sliding surface (wall surface of Bennett frame 5aR)Plane formed by maxillary arch 4AgainstAngle when moving from position (a) to position (b) (for example, 52 degrees with respect to the plane formed by the maxillary arch 4)Tilt downward. Then, the numerical value calculated by the TNM (Try & No Miss) system is substituted into the flip-up plate 25bR, the small screw 30R is rotated to push out the condylar bulb contact piece 7R, and FIG.bThe condylar sphere 1R is moved to a point.
[0069]
  thisBalanced sideTransfer of condylar ball 1RIn motionNext, check that the canine of the upper denture on the working side or the canine and the premolar are in contact with any denture that engages the lower jaw.
[0070]
  If the canine of the upper denture on the working side or the canine and premolar do not contact the lower denture at this time, a denture with no biocompatibility will be obtained. The canine teeth or canine teeth and premolars are in contact with any denture that engages the lower jaw.
[0071]
  In addition, if the canine of the upper denture on the working side or the canine and the premolar are in strong contact with any denture that engages the lower jaw, the tip pin 9 is lifted with respect to the flip-up plate 25bR and a gap is generated. The tip pin (incisal pin) 9 is moved to the flip-up plate 25bR by adjusting so that the canine of the upper denture on the working side or the canine and premolar contact with the lower denture is in good condition. lightlycontactTo adjustTheIn this specification, when the canine of the upper denture on the working side or the canine and the premolar are in good contact with the lower denture, the state where the tip pin 9 is in light contact with the flip-up plate 25b is referred to as contact between the dentures. The state and the contact state of the tip pin 9 and the flip-up plate 25b are “synchronized”.thingTo.
[0072]
2) While rotating the small screw 30R clockwise from the zero setting position (point a) to the point b in FIG. 12 while the condylar ball 1R is advanced by α mm, the canine or canine and premolar of the upper denture on the working side In contact with an arbitrary denture that engages the lower jaw, the shape of the denture (dental model) is corrected using a wax material so that the contact between the tip pin 9 and the flip-up plate 25bR is always synchronized.
[0073]
3)ThenThe gap between the upper and lower first premolars on the balanced side is filled with a wax material or the like so that the distance between the upper and lower tooth models between the upper and lower first premolars on the balanced side does not change. This is the next step, 4).Centering on the rotation axis 6cY axisDirection to rotation axisThis is to prevent rotation and rolling.
[0074]
4) Next, the grasping portion 40a of the maxillary arch support stick 40 is rotated forward to push up the distal end portion 40b to come into contact with the bottom surface of the maxillary arch 4.Centering on the rotation axis 6c of the frame 6 and the Bennett part 5The maxillary arch 4 rolls when rotating around the Y axis.ToTo prevent it. These steps 3) and 4) are intended to prevent the upper arch 4 from rolling even in the articulator because there is no rolling (also called yawing) in the movement of the human upper jaw.
[0075]
5) Next, the balance-side knob 34R is loosened so that the upper column 35R can move upward.
[0076]
6) Next,position(b)From the pointThe condylar housing part on the balance side (angle 39 degrees with respect to the plane formed by the maxillary arch 4) so as to be at an angle when moving from the position (b) to the position (c) with respect to the plane formed by the maxillary arch 4 ( (Bennet part 5R and condylar frame 6R combination)By tilting downward, the upper column 35R on the equilibrium side is pushed upward to bring the bottom surface (sliding surface) of the longitudinal Bennet frame 5aR into contact with the sliding point on the upper surface of the condylar sphere 1R. Thereafter, the knob 34R is tightened to fix the upper column 35R and the lower column 13R.
[0077]
  If there is a gap between the bottom surface (sliding surface) of the Bennett frame 5aR and the condylar ball 1R, the upper and lower jaw arches 3 and 4 cannot be moved while being supported by the condylar ball 1R. The movement of the upper and lower jaws cannot be reproduced. Therefore, as described above, the knob 34R is loosened and the upper support 35R is moved up and down to bring the bottom surface (sliding surface) of the longitudinal Bennet frame 5aR into contact with the condylar sphere 1R, and then the knob 34R is tightened to remove the upper support 35R. Fix to the base column 13R. At this time, the small screw 30R is advanced by α mm, and the condylar bulb piece 7R and the condylar bulb 1R are in contact with each other.
[0078]
  When the Bennett part 5R is tilted 39 degrees downward, the maxillary arch 4 is viewed from the front with the condylar sphere 1R as the lowest point.leftInclined upward and the tip of the maxillary arch 4 is tilted upward,Calculated from TNM system (described later)Tilt the flip-up plate 25bR by an inclination angle with respect to a predetermined level.After that, loosen the screw 24Abut on the tip pin 9 of the insisal pin 22After tightening the screw 24(If the inclination angle of the flip-up plate 25b is changed from 52 ° to 39 °, a gap will be formed between the flip-up plate 25bR and the tip pin 9, so that the screw 24 is loosened and the Tighten it with the tip pin 9 in contact.)
  this isFor the flip-up tilt angle of the flip-up plate 25bRforWhen the balance condyle 1R moves forward and downwardInThe maxillary arch 4 of the articulatorButCorrection of rollingAnd workOf the side occlusion point (for example, the point where the canine tooth of the upper jaw model and the tooth to be engaged of the lower jaw model contact)Centering on the rotation axis 6cY axisdirectionofAxis of rotationThe correction in the distance from the center of the upper working side condylar sphere 1L and the correction in the distance from the center of the working side condylar sphere 1L on the X axis of the occlusal point are performed.
[0079]
7) Setting of this articulatorAfter theWhile the small screw 30R is further rotated to the right to advance the condylar ball 1R by β mm from the point b to the point c, the canine of the upper denture on the working side or any denture in which the canine and the premolar occlude the lower jaw The shape of the denture (dental model) is corrected using a wax material so that the contact state is lightly maintained. The contact state of the upper denture of the upper jaw on the working side or the canine and premolar of the lower denture (dental model) can be confirmed by the synchronized contact between the tip pin 9 and the flip-up plate 25bR.
[0080]
8)ThenThe gap between the upper and lower first premolars on the balanced side is filled with a wax material or the like so that the distance between the upper and lower tooth models between the upper and lower first premolars on the balanced side does not change. This is because the upper arch 4 isCentering on the rotation axis 6cY axisdirectionThis is to prevent rolling (yawing) from rotating about the rotation axis.
[0081]
9) Next, the grasping portion 40a of the maxillary arch support stick 40 is rotated forward to push up the distal end portion 40b to come into contact with the bottom surface of the maxillary arch 4.For frame 6 and Bennettparts5ofCentering on the rotation axis 6cThe upper arch 4 is prevented from rolling (yawing) during rotation about the Y axis direction. These 8) and 9) are intended to prevent the maxillary arch 4 from rolling even in the articulator because there is no rolling (yawing) in the movement of the human maxilla.
[0082]
10) Next, the balance-side knob 34R is loosened so that the upper column 35R can move upward.
[0083]
11) Next, in FIG.Position (c)FromThe angle of the balance side (right side) so that the angle (for example, 20 degrees with respect to the plane formed by the maxillary arch 4) is an angle when moving from the position (c) to the position (d) with respect to the plane formed by the maxillary arch 4.Condylar housing parts (Bennet part 5R and condylar frame 6RCombination of)TheTilt downward and push up the upper support column 35R on the equilibrium side so that the bottom surface (sliding surface) of the longitudinal Bennet frame 5aR and the top surface of the condylar ball 1R come into contact with each other, and then tighten the knob 34R The support column 35R and the lower support column 13R are fixed.
[0084]
  This means that if there is a gap between the bottom surface (sliding surface) of the Bennett frame 5aR and the condylar ball 1R, the movements of the upper and lower jaw arches 3 and 4 supported by the condylar ball 1R cannot be obtained. The movement of the upper and lower jaws cannot be reproduced. Therefore, the knob 34R is loosened and the upper support 35R is moved up and down to bring the bottom surface (sliding surface) of the long Bennet frame 5aR into contact with the condylar ball 1R, and then the knob 34R is tightened to fix the upper support 35R to the base support 13R. Let At this time, the small screw 30R is advanced α + β mm from the zero setting position as a total, and the condyle ball piece 7R and the condyle ball 1R are in contact with each other.PleaseIt is in a state.
12) When the Bennett part 5R is tilted downward by 20 degrees, the maxillary arch 4 tilts to the left in front view, and the tip of the maxillary arch 4 tilts upward. After the flip-up plate 25bR is inclined by an inclination angle with respect to a predetermined horizontal calculated by the system (described later), the screw 24 is loosened and brought into contact with the tip pin 9 of the insisal pin 22, and then the screw 24 is tightened. (If the inclination angle of the flip-up plate 25b is changed from 39 ° to 20 °, a gap will be formed between the flip-up plate 25bR and the tip pin 9, so the screw 24 is loosened and the tip of the incisal pin 22 is placed. Tighten the pin 9 in contact.)
This is because the balance-side condylar ball 1R moves forward and downward with respect to the flip-up tilt angle of the flip-up plate 25bR. When moving, the upper arch 4 of the articulator is corrected to be rolling, and the rotation axis 6c of the working side occlusion point (for example, the point where the canine teeth of the upper jaw model and the teeth to be engaged with the lower jaw model contact) is centered. The correction in the distance from the center of the working side condylar sphere 1L in the Y-axis direction and the occlusal point X Correction in the distance from the center of the working side condylar ball 1L on the axisI do.
[0085]
13) Setting this articulatorAfter the, Further rotating the small screw 30R to the right to advance the condylar ball 1R by γ mm from the point c to the point d, contact between the canine or canine of the upper jaw on the working side or the canine and the premolar and the lower denture, The form of the denture (dental model) is corrected using a wax material so that the contact between the tip pin 9 and the flip-up plate 25bR is always synchronized.
[0086]
  Depending on the person, the condylar tract housing parts may be further tilted with the condylar sphere running surface downward at a predetermined angle with respect to the horizontal plane to check the contact between the upper and lower jaws.
[0087]
(7) “Improvement of patient's occlusion”
  The above-described method for producing a rough prosthesis using the articulator according to the present embodiment will be described in more detail, and the occlusal state will be reconstructed after the patient's temporomandibular joint has no abnormalities or the temporomandibular joint dysfunction is improved An example will be described.
[0088]
  in frontOfIn cases, this is done in order to make the prosthesis function normally after correction of the missing tooth or after the crown is attached to the tooth.
  The idea in this case is that the condylar movement during the actual jaw movement of the patient is acquired as three-dimensional data by the jaw movement inspection device, and the upper jaw model and the lower jaw model mounted on this articulator are The prosthesis is produced so that the patient's upper and lower teeth are normally occluded at the maximum intercuspal fitting position (hereinafter sometimes referred to as ICP) while reproducing the jaw movement of the patient.
[0089]
(S1) First, a model of the upper and lower jaws for preparing a patient's prosthesis is obtained.
[0090]
(S2) Then, in order to create a prosthesis, the patient's upper jaw (not the upper and lower jaw model) is placed on a flat plate through wax to collect a plane. As this plane, a Kampel plane is used. The Kampel plane is the nose auditory canal line, which is a plane connecting any point of the tragus and the lower point of the nose wing when viewed from the side, and a plane parallel to the line connecting the left and right pupils when viewed from the front. It is said that this plane is parallel to the occlusal plane.
  After the above preparation is completed, the jaw movement of the patient is analyzed using the jaw movement inspection device (trade name: CADIAX COMPACT).
[0091]
(S3) The following data is collected at the time of front / back movement of the jaw, left side movement, right side movement, and opening / closing movement. The patient wears the jaw movement inspection device and electrically records the movement trajectory of the tip of the member that interlocks with the movement of the front and rear, the left and right sides, and the opening and closing of the jaw. Measurement data can be obtained.
[0092]
  The measurement data are the sagittal condyle path angle of the condyle (angle θ in the XZ plane (FIG. 13)), the coordinate position of the condyle on the Y axis, the Bennett angle of the condyle (angle in the XY plane), left and right sides The angle (sagittal condyle path angle and Bennett angle) of the working side condyle during the lateral movement is displaced backward.
[0093]
(S4) Maximum cusp fitting position (ICP) of patient's tooth contactA mold corresponding to the three-dimensional spacing between the upper and lower teeth of the upper and lower jaw model set to obtainA mold is prepared using a silicon material.
[0094]
(S5) Next, during the jaw movement test, the patient is mounted only with the reference plane setting member (upper bow) of the jaw movement test apparatus, and the jaw movement is performed using the plane plate so as to be parallel to the reference plane setting member. Data on the reference plane at the time of inspection is obtained (3D measurement data can be accurately reflected in the articulator by obtaining a plane parallel to the measured XY plane (plane formed by the XY axes)).
[0095]
(S6) Attach the maxillary model to the position of the articulator where the reference plane and maxillary arch at the time of the patient's jaw movement test obtained by the above operation are parallel and the midline of the maxillary model is parallel to the midline of the articulator .
[0096]
(S7) The lower jaw model is attached to the articulator so that the lower jaw model becomes ICP (maximum cusp fitting position) through the silicon material obtained in (S4) with respect to the upper jaw model.
[0097]
(S8) Wax obtained by releasing the fixation of the upper jaw model and the lower jaw model so that the lower jaw model can move freely on the lower arch of the articulator and then obtaining a Kampel plane on the occlusal surface of the upper jaw model (S2) After removing the mandibular model and attaching the occlusal plate for attaching the articulator (not shown) and adjusting it so that it is the same plane as the Camper plane, the upper jaw is scheduled to be prepared vertically Make sure that the length of the teeth and the height of the upper central incisor preparation site on the upper surface of the occlusal plate for attaching the articulator are aligned..
(S8) Thus, the zero point shown in FIG. 12 obtained from the TNM system using mathematical expressions represented by the following expressions (1), (2), etc.Position (a) to Position (b), Position (b) to Position (c), Position (c) to Position (d)Find the angle of inclination (θ) with respect to the reference plane and the distance between each point (α, β, γ, etc.). In accordance with this, the position of the condylar sphere 1 in the three-dimensional position and the inclination angle of the incisal table 25b by adjusting the positions of the condylar housing parts 5 and 6 of the articulator, The planned prosthesis is prepared by sequentially adjusting the contact height.
[0098]
  An example of the calculation formula is shown below.
  For example,Position (a) to position (b)When exercising toPosition (b)The X value of the point (the value on the X axis of the point on the three-dimensional coordinate, the point on the corresponding X, Y, or Z axis is simply referred to as the X, Y, or Z value) is (+) from the X value. AndPosition (a)Z value ofPosition (b)When the Z value is (+) (see FIG. 13), the working condylar sphere 1L is fixed and the balanced condylar sphere 1R is moved forward and downward according to the equations (1) and (2). The inclination angle θ and the movement distance α of the balanced condylar sphere 1R can be obtained.
  Tilt angle θ degrees = (+) sin-1 {Z / √ (X2 + Z2-2XZcos90)} (1)
  Back upward (-) αmm = √ (X2 + Z2-2XZcos90) (2)
  The coordinate axisPosition (a)WhenPosition (b)Position ofRelationshipTherefore, the calculation formulas (1) and (2) are different from each other.
[0099]
  In addition, the occlusal point (for example, the point where the canine tooth of the upper jaw model and the tooth to be occluded of the lower jaw model come into contact) from the inclination angle θ and the movement distance α of the balanced condylar sphere 1R obtained.InThe flip-up angle of the flip-up plate (inside guide table) 25R is calculated so that the canine-tooth guided road angle is the same as the condyle road angle of the balanced condylar sphere 1R. In order to compensate for the rolling angle of the maxillary arch 4 of the articulator when the balance side condylar sphere 1R moves forward and downward, the working side on the Y axis of the balance point of the occlusal point is corrected. The correction is performed by correcting the distance from the center of the condylar sphere 1L and correcting the distance from the center of the working side condylar sphere 1L on the X axis of the occlusal point.
[0100]
  More specifically, assuming that the coordinate point of the occlusal point C1 shown in FIG. 8 is (x1, y1, z1), the inclination angle (θ: example 52 °) with respect to the reference plane (A) shown in FIG.Position (a)pointFrom position (b)Consider a case where the balanced condylar sphere 1R is moved to a point by a distance αmm.
[0101]
  For example, if it is considered that the balanced condylar ball 1R does not rotate at the occlusal guidance inclination angle θ1 that the occlusal point C1 (FIG. 8) between the canine teeth of the upper jaw model and the other teeth of the lower jaw model originally has, the balanced condylar ball It can be calculated based on the coordinate point of the occlusal point C1 from the 1R induced inclination angle (the inclination angle θ).
[0102]
  In order to express the occlusal guidance inclination angle θ1, it is necessary to reflect the following correction value μ ° in the inclination angle π ° of the flip-up plate 25bR.
[0103]
  First, the balance-side condylar sphere 1R is inclined at an inclination angle θ (= 52 °), and FIG.Position (a) to point (b)When the point is moved by a distance αmm, the flip-up plate 25bR is inclined at an inclination angle of π ° in order to express the occlusion guidance inclination angle θ1 of the occlusion point C1 having the same angle as the inclination angle θ of the equilibrium condylar sphere 1R. I have to let it.
[0104]
  In addition, the occlusal point is taken into account by taking into consideration the value μ ° corrected so that the maxillary arch 4 is in a non-rolling state with respect to the mandibular arch 3 when the equilibrium condylar sphere 1R is tilted at the tilt angle θ. It is necessary to move from C1 to C2. This means that the upper jaw of the living body does not roll with respect to the skull of the living body, and as a result, the upper jaw does not roll with respect to the lower jaw. Therefore, this state is expressed on the articulator and the occlusal point C1, It is necessary to obtain the coordinate point of C2.
[0105]
  Without moving the working side condylar ball 1L,Heng side condylar ball 1Rposition(a)Point →position(b)In order to express the occlusal guidance inclination angle θ1 of the occlusal point C1 having the same angle as the inclination angle θ of the balanced condylar sphere 1R when moving to the point by a distance αmm, the flip-up plate 25bR is inclined at an inclination angle of π °. I have to letWhen the flip-up plate 25bR is inclined at an inclination angle of π °,The incisal pin 9 at the tip of the maxillary arch 4 moves upward while abutting on the flip-up plate 25bR inclined at the inclination angle π °.However, as described above, when the balanced condylar sphere 1R moves from the position (a) to the position (b) by a distance αmm, the maxillary arch 4 tilts upward in the front view and the maxillary arch 4 Since the distal end of the upper heel tilts upward, the maxillary arch 4 has an inclination with respect to the reference plane at the time of zero setting.
[0106]
  If this inclination is corrected and not set parallel to the plane of the maxillary arch 4 at the time of zero setting, CDIAX DATA To use CADIAX Since the reference plane (A) at the time of measurement and the surface of the maxillary arch 4 at the time of zero setting must always be maintained in parallel, the maxillary arch at the time of setting the inclination of the maxillary arch 4 to zero is described above. It is necessary to correct to 4 planes. The correction value angle used at this time is referred to as a correction value angle μ °.
[0107]
  Thus, in a state in which the maxillary arch 4 that is the reference plane is rolled to become a plane different from the reference plane (A) that is a predetermined horizontal plane, the occlusal point C1 with respect to the reference plane (A), Since C2 data cannot be collected, the rolling of the maxillary arch 4 is corrected to a non-rolling state using the corrected inclination angle μ °. Because the upper jaw in the living body does not roll, and the reference plane (A) at the time of data collection does not roll at the time of data collection, it is necessary to express this state on the articulator. It is.
[0108]
  In addition, the occlusal point moves from point C1 to point C2 as the balance side condylar sphere 1R moves forward and downward to reach point a → b. At this time, the balance side condylar sphere 1R rotates. As a result, the movement from the point C1 to the point C2 is affected. In consideration thereof, the occlusal point C1 moves in a circular arc around the equilibrium condylar sphere 1R, and these also determine the occlusal guidance inclination angle θ1 when moving from the occlusal point C1 to the occlusal point C2. Must be considered.
[0109]
  For example, the working side condyle 1L is fixed, and as shown in FIG. 12, the balance side condyle 1R is inclined at an angle θ of 52 ° with respect to the reference plane (A) at a point b that is anteriorly lower from the point a by a distance αmm. In this case, since the length L from the position a point (point C1 ′ in FIG. 8) to the occlusal point C1 of the balanced side condyle 1R does not change, FIG. 14 shows the three-dimensional balanced side condyle 1R. When the movement from the occlusion point C1 to the occlusion point C2 corresponding to the movement from the point a (C1 ′ point) to the b point (C2 ′ point) is shown, the occlusion point C1 is the virtual point C1 ″.Moving point (when 1R of C1 moves from point a to point b when 1R is considered not rotating)From this point, it moves to a new occlusion point C2 while moving in an arc. Further, in order to obtain the length L, not only the X and Y axis coordinate points of the occlusal point C1, but also the Z coordinate point is required.
[0110]
  When the three-dimensional balanced condylar head 1R shown in FIG. 14 moves from the point a to the point b, the occlusal point moves from the point C1 to the point C1 ″, but the balance side condyle 1R moves from the point a to the point b. When the balance-side condyle 1R makes a rotational movement when moving to the occlusal point C1, the occlusal point C1 moves to a new occlusal point C2.
[0111]
  The “guided inclination angle θ1 to be given to the occlusal point C1” obtained from the above is an angle θ3 with respect to the reference plane A shown in FIG.
[0112]
  Therefore, when the balance-side condyle 1R rotates when the balance-side condyle 1R moves from the point a to the point b by θ ° (52 °) and α mm with respect to the reference plane A, the occlusal point is the point C1 → C2. The point moves with respect to the reference plane A at an angle θ3. As a result, in order for the occlusal point C1 to move at an angle θ3, it must be determined and substituted by adding the correction value angle μ ° to the inclination angle π ° of the incisal table 25bR.
[0113]
  The articulator can also be used in cases where the patient's temporomandibular joint is abnormal or in cases where the functional condition of the temporomandibular joint is improved and the occlusal state is reconstructed.
[0114]
  As described above, according to the articulator of the present embodiment, the movement of the human upper and lower jaws can be reproduced on the articulator, and a prosthesis having high biocompatibility can be obtained.
[0115]
【The invention's effect】
  Thus, according to the articulator of the present invention, the movement of the human upper and lower jaws can be reproduced on the articulator, and a prosthesis having high biocompatibility can be obtained.
[Brief description of the drawings]
FIG. 1 is a bird's-eye view of an articulator according to an embodiment of the present invention.
FIG. 2 is a bird's-eye view from the front of the articulator of FIG. 1;
3 is a side view of an inner cylinder part, an outer cylinder part, and a knob that are integral with the condylar sphere of the articulator of FIG. 1; FIG.
4 is an exploded view showing an assembly procedure as seen from the front side of the condylar housing part of the articulator of FIG. 1. FIG.
5 is an exploded view (FIG. 5 (a)) showing an assembly procedure when the condyle housing part of the articulator of FIG. 1 is viewed from the side, and an arrow view from the direction of arrow A (FIG. 5 (b)). .
6 is a bottom view of the condylar housing part of the articulator of FIG. 1. FIG.
7 is a bottom view of the condylar housing part of the articulator of FIG. 1, and is a state diagram at a position of 90 ° with respect to the Y axis which is the initial position of FIG. 7 (a), FIG. From the initial position, the Bennett frame is inward (in the direction of the center) and is located at a position of 35 ° with respect to the Y axis. FIG. 7 (c) is directed outward (in the direction away from the center of the articulator). It is a state figure which exists in the position of 45 degrees with respect to the Y-axis.
8 shows a state in which the sliding point contacting the longitudinal Bennet frame sliding surface of the condylar tract housing part and the bottom surface of the upper surface of the condylar sphere is separated after the condylar sphere of the articulator of FIG. 1 is moved forward. FIG.
9 shows a state in which the sliding point contacting the longitudinal Bennet frame sliding surface of the condylar tract housing part and the bottom surface of the upper surface of the condylar ball is separated after the condylar ball of the articulator of FIG. 1 is moved forward. FIG.
10 is a diagram for explaining a problem when changing the angle of the condylar path frame 6 of the articulator of FIG. 1. FIG.
11 is a side view (FIG. 11 (a)) and a rear view (FIG. 11 (b)) of the main part of the articulator of FIG. 1;
12 is a diagram showing a trajectory when the sagittal anterior condylar inclination angle from an arbitrary position during movement of the condylar sphere of the articulator of FIG. 1 is changed. FIG.
13 is a diagram for deriving a calculation formula for calculating an inclination angle and a movement distance of a condylar path housing part at the time of inclination / advancement of the condylar sphere of the articulator shown in FIG. 12;
FIG. 14 is a diagram showing a state of moving from the occlusal point C1 to the occlusal point C2 corresponding to the movement from the point a (C1 ′ point) to the point b (C2 ′ point) of the three-dimensional balanced condyle 1R. is there.
[Explanation of symbols]
    1 Condylar sphere 2 Torsion bar
    3 Lower jaw 4 Upper jaw
    5 Bennett parts 5a Long Bennett frame
    5b Back Bennett frame
    5c Bennet frame on the bottom side
    5d Side-attached Bennet frame
    5e Screw part 5f Gauge
    6 Condylar frame 6a Condylar frame body
    6b Side frame 6c Rotating shaft
    6d knob 6e gauge
    6f Bennett gauge 6g hole
    7 Condylar ball contact frame 7a Screw
    7b Condylar sphere contact piece 8 Condylar sphere pressing screw
    9 Tip pin 11 Specified position setting plate
    12 Spring frame 12a Hole
    12b Bent part 13 Base column
    15 Knob 16 Inner cylinder parts
    17 Outer cylinder parts 17a Notch
    17b Screw part 18 Sleeve
    19R knob 20 spring
    21 bolts 22 incisal pins
    23 guide member 23a gauge
    23b Standard position line
    24 screws 25 incisal table
    25a Specified position setting plate 25b Bounce plate
    25bf gauge
    30 Machine screw 32 Machine screw
    32a Hollow shaft screw 34 Knob
    35 Upper support 40 Maxillary arch support stick
    40a Grasping part 40b Tip part
    41 knobs

Claims (4)

A pair of left and right columns (13, 35) capable of adjusting the vertical position, and a maxillary arch (4) provided with a base for bridging and connecting the tops of both columns near the tops of the pair of columns (13, 35); A mandibular arch (3) having a base for bridging and connecting the bases of the pair of struts (13 , 35 ), a pedestal (25) provided at the tip of the mandibular arch (3), and a maxillary arch (4 The upper arch (4) on which the tip pin (9) having a screw (24) fixed on the base (25) having the flip-up plate (25b) of the lower arch (3) contacts and slides is provided. In an articulator comprising a rod (22) for adjusting the distance between the chin and the mandibular arch (3),
Condylar sphere parts (16, 17) provided at the tip with condylar spheres (1) provided so as to be able to advance and retreat in the directions facing each other in the vicinity of the tops of a pair of left and right vertically adjustable columns (13, 35);
A rotating shaft (6c) extending in the horizontal direction rotatably attached to the vertical side surface of the base of the maxillary arch (4) for sandwiching the condylar sphere (1), and a gauge for measuring the rotational angle of the rotating shaft (6c) ( A condylar frame (6) having 6e) ;
A knob (41) provided on the maxillary arch (4) for fixing the condylar frame (6) to the maxillary arch (4) after adjusting the amount of rotation of the condylar frame (6);
Attachment of a condylar frame (6) disposed parallel to the rotational axis (6c) of the condylar frame (6) to sandwich the condylar sphere (1) together with the condylar frame (6) Bennet parts (5) rotatably supported on the surface (bottom of 6a),
An occlusion characterized by comprising a maxillary arch support stick (40) removably attached to the base side of the lower arch (3) and provided with a telescopic tip that contacts the bottom surface of the upper arch (4) vessel. The condylar sphere parts (16, 17) having the condylar sphere (1) at the tip are tightened by inserting the inner cylinder part (16) integrated with the condylar sphere (1) and the inner cylinder part (16). Consists of possible tube-shaped outer cylinder parts (17),
After attaching the outer cylinder part (17) with the inner cylinder part (16) inserted into the upper column (35), the outer cylinder part (17) is attached to the upper column (35) with respect to the upper column (35). The screw-type knob (19) and the inner cylinder part (16) for fixing and free-fitting can be fixed and free-fitting to the outer cylinder part (17) inside the outer cylinder part (17). 2. The articulator according to claim 1, further comprising a knob (15). The Bennett part (5) includes a condylar ball abutting piece (7) that is movable in the axial direction and serves to adjust the position of the condylar sphere (1) and hold the condylar sphere.
The condylar sphere abutting piece (7) is screwed together and is provided so as to pass through one frame (5b) of the Bennett part (5). The articulator according to claim 1, further comprising a movement amount adjusting member (30, 32) capable of moving and adjusting a movement amount of the condylar ball contact piece (7) in the axial direction. In moving the condylar ball of the articulator close to the human temporomandibular joint,
1) First, the coordinate position where each part of the articulator according to claim 3 is arranged on the three-dimensional coordinate axis composed of the XYZ axes and the way of contact between the parts are respectively defined initial values. Is set to zero,
2) (a) Zero setting of the balance-side condylar sphere (1) in the horizontal X-axis direction on the straight line perpendicular to the straight line connecting both condylar spheres (1, 1) at the time of zero setting Travel from time ,
(B) The amount of movement of the balanced condylar sphere (1) in the horizontal Y-axis direction on the straight line connecting both condylar spheres (1, 1) at the time of zero setting from the time of zero setting ,
(C) The amount of movement of the balance-side condylar sphere (1) from the time of zero setting in the Z-axis direction in the vertical direction, which is the longitudinal direction of the support column (35),
(D) rotation angle from the time of zero-setting of the balanced side condyle path frame about the axis of rotation (6c) (6) and
(E) the (a) transfer momentum to the longitudinal direction from the zero setting of the balanced side condylar spheres in ~ (d) (1)
The amount of movement from zero setting of the balance-side condylar sphere contact piece (7) adjusted by the rotation of the movement adjustment member (30, 32) and the rotation axis (6c) of the balance-side condylar frame (6). determined by the first rotation angle of the predetermined angle component of the plurality of setting the rotation angle of the center to the Y-axis direction as a center axis parallel to the articulator adjustment of the balanced side condylar balls (1),
Balanced side condyle ball (1) is the axis of rotation of the condyle path frame (6) so as to abut comfortably in two wall surfaces (wall surfaces of Bennett frame 5a and 5d) for condylar ball sliding part for Bennett (5) (6c) is fixed by tightening the balanced side of the knob (41) after adjusting said first predetermined angle component of the rotation angle to the balanced side of the gauge to the center axis of the Y-axis direction (6e) around the After adjusting the amount of movement of the condylar ball parts (16, 17) in the Y-axis direction, the balance knob (15) is tightened to fix the position of the condylar ball (1) ,
3) parts for Bennett balanced side (5) balanced side condylar ball as one of the walls for condylar ball slide is inclined to said first predetermined angle amount downward relative to the reference plane (A) of (1 ) And the condylar tract frame (6) are rotated, and the flip-up plate (25b) is inclined by a predetermined inclination angle with respect to the reference plane (A), and the movement amount adjusting member (30) is rotated to rotate the condylar sphere. Extrude the contact piece (7), move the equilibrium condyle sphere (1) in contact with the condyle sphere contact piece (7),
4) At the start of movement of the balanced condylar sphere (1), the canine of the upper denture on the working side or the canine and the premolar are in good contact with the lower denture and the tip pin (9) springs up Modifying the shape of the lower denture wax so that the state of light contact with the plate (25b) is synchronized,
5) Next , the gap between the upper and lower first premolars on the equilibrium side is filled with a wax material so that the distance between the upper and lower tooth models between the upper and lower first premolars on the equilibrium side does not change,
6) and then pushes up the maxillary arch support sticks (40) contacting the bottom surface of the maxillary arch (4), the combination of parts for balanced side Bennett (5) and the balanced side condyle path frame (6) rotation axis (6c ) To prevent the maxillary arch (4) from rolling during rotation about the rotation axis in the Y-axis direction.
7) After that, the balance-side column (35) can be moved upward, and the condylar ball sliding wall surface of the balance-side Bennett part (5) is connected to the reference plane (A) . The balance-side condylar sphere 1 is adjusted by the balance-side gauge (6e) so as to be a second predetermined angle among a plurality of set rotation angles, and then the balance-side knob (41) is tightened and fixed. and, the balanced side of the strut (35) fixed at a position where the condyle ball gliding wall (wall of 5a and 5d) are in contact in the balanced side condylar balls (1) and parts for balanced side Bennett (5), the equilibrium splashed plate side and (25b) is inclined at an angle corresponding to said second predetermined angle, the tip pin (9) by loosening the screws (24) for fixing the balanced side splashing plate (25b) and distal pin After adjusting the movement so that (9) is in contact , the tip pin (9) fixing screw (2 4) Tighten and fix,
8) Further, the operations of 3) and 4) are repeated by the set rotation angle for adjusting the articulator of the balance-side condylar ball 1 for adjusting the articulator of the balance-side condylar ball 1 which is necessary. While confirming the contact state between the canine of the upper upper denture or the canine with the lower denture of the premolar, the contact between the tip pin (9) and the flip-up plate (25b) is always synchronized. 4. The method for producing a prosthesis using an articulator according to claim 3 , wherein the shape of the denture (dental model) is corrected.

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