WO2020065847A1 - 咬合器 - Google Patents

咬合器 Download PDF

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Publication number
WO2020065847A1
WO2020065847A1 PCT/JP2018/036024 JP2018036024W WO2020065847A1 WO 2020065847 A1 WO2020065847 A1 WO 2020065847A1 JP 2018036024 W JP2018036024 W JP 2018036024W WO 2020065847 A1 WO2020065847 A1 WO 2020065847A1
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WO
WIPO (PCT)
Prior art keywords
groove
jaw
jaw support
support
support shaft
Prior art date
Application number
PCT/JP2018/036024
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
秀明 後藤
晃幸 岩▲崎▼
昌広 細谷
俊光 国保
晃士朗 松尾
侑平 松岡
眞之介 安藤
Original Assignee
株式会社ニッシン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ニッシン filed Critical 株式会社ニッシン
Priority to PCT/JP2018/036024 priority Critical patent/WO2020065847A1/ja
Priority to JP2020547738A priority patent/JP6951808B2/ja
Priority to CN201880098106.6A priority patent/CN112770693B/zh
Publication of WO2020065847A1 publication Critical patent/WO2020065847A1/ja

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C11/00—Dental articulators, i.e. for simulating movement of the temporo-mandibular joints; Articulation forms or mouldings

Definitions

  • the present invention relates to an articulator.
  • an articulator that reproduces the jaw movement of a human body has been used, for example, when manufacturing a denture or a dental prosthesis.
  • This articulator includes an upper jaw support section to which an upper jaw model is fixed, a lower jaw support section to which a lower jaw model is fixed, and a joint section that rotatably connects the upper jaw support section and the lower jaw support section.
  • Such an articulator may be provided with a holding mechanism for the support shaft (see Patent Document 1).
  • This articulator of the prior art is fixed to the support shaft by penetrating the support shaft through a through hole provided at the rear part of the articulator and fixing with a screw.
  • the support shaft may have a lower end erected on a fixed base and a head portion attached to an upper end.
  • the articulator of the prior art described above requires that the support shaft be removed from the fixed base or the head portion removed, so that one of the support shafts must be in a state in which nothing is attached.
  • the articulator cannot be attached to or detached from the shaft. Therefore, it is not easy to attach and detach the articulator to and from the support shaft.
  • the object of the present invention is to provide an articulator that can be attached to and detached from the support shaft at a position other than the end of the support shaft.
  • the present invention provides an upper jaw model in which an upper jaw model is fixed to the front side, an upper concave part which is recessed forward is provided on the rear side, and a lower jaw model is fixed to the front side and is depressed forward.
  • a lower concave portion is provided below the upper concave portion on the rear side, and a lower jaw support portion swingably connected to the upper jaw support portion around an axis extending left and right, and the upper concave portion and the lower concave portion.
  • a support shaft fixing member that is detachable on the rear side of the lower recess, and a support shaft body is sandwiched between the upper recess and the lower recess and the support shaft fixing member,
  • An articulator attachable to a predetermined position of the support shaft, wherein upper and lower portions are formed on left and right portions of the inner surface of the upper recess, which extend vertically and do not penetrate the upper end but penetrate the lower end. Opposite left on the inner surface of the lower recess When the lower jaw support portion is at a predetermined angle with respect to the upper jaw support portion, a lower groove extending in the same straight line as the upper groove is formed in a portion of the support shaft.
  • the body fixing member includes a main body portion, a wide portion provided on each of the left and right sides of the main body portion, and a narrow portion continuously extending from the wide portion.
  • the support shaft fixing member includes the wide portion.
  • the inner surface of the lower groove includes a front surface, a rear surface, and a side surface, and the length of a gap between the upper groove and the lower groove when the upper groove and the lower groove are substantially aligned in a straight line is TL, the upper groove.
  • UL is the length
  • DL is the length of the lower groove
  • LL is the length of the wide portion
  • SL is the length of the narrow portion
  • SW is the distance between the outer edges of the narrow portion provided on the left and right
  • DWI is the distance between the inner edges of the rear surfaces of the lower grooves provided on the left and right
  • the distance between the outer edges of the wide portion is provided on the left and right.
  • the upper jaw support portion includes an upper jaw fixing portion fixed to the upper jaw model, a pair of upper rearward extension portions extending rearward from both left and right ends of the upper jaw fixing portion, and a rear end of the pair of upper rearward extension portions.
  • the upper connecting portion is provided with the upper concave portion, and the lower connecting portion is preferably provided with the lower concave portion. .
  • the upper jaw support portion includes a first engagement portion and a second engagement portion that protrude radially outward of the axis, and the lower jaw support portion is provided on the lower back extension portion, and the upper jaw support portion
  • a first state in which the angle between the lower jaw support and the lower jaw support is a first angle
  • the upper jaw support and the lower jaw support are located in front of the first engagement portion and the second engagement portion.
  • the angle between the upper jaw support and the lower jaw support is located between the first engagement portion and the second engagement portion.
  • a stopper provided on the upper jaw support and having a downward surface; and a stopper receiver provided on the lower jaw support and having an upward surface that contacts the downward surface in the first state. Is preferred.
  • the condylar tract has an upper wall and a lower wall extending rearward from the back of the mandibular posterior extension and has a U-shaped cross section, and the condylar head is formed of the condylar tract. It is rotatably held on the front side between the upper wall and the lower wall, the distance between the upper wall and the lower wall becomes narrower from the front to the rear, and the condylar head is When the first engagement portion or the second engagement portion crosses over the engagement receiving portion, the upper wall portion and the lower wall portion are elastically deformed, and the upper wall portion and the lower wall portion are deformed. Between the front side and the rear side.
  • ⁇ It is preferable that the radial distance of the tip of the second engaging portion from the axis is larger than the radial distance of the tip of the first engaging portion from the axis.
  • the condylar head protrude in the left-right direction from the rear side of the maxillary posterior extension.
  • a bolt is inserted into a first model mounting hole for inserting a bolt into a bolt hole provided in the upper jaw model in the upper jaw fixing portion, or a bolt hole provided in the lower jaw model in the lower jaw fixing portion. It is preferable that at least one of the second model mounting holes is U-shaped.
  • the upper jaw support section and the lower jaw support section are each preferably an integrally molded resin member.
  • the present invention can provide an articulator that can be attached to and detached from the support shaft at a position other than the end of the support shaft.
  • FIG. 1 It is a perspective view showing the articulator concerning the embodiment of the present invention. It is an exploded perspective view of an articulator. It is a rear view of an articulator. It is a side view of an articulator, and is a figure showing the state where an upper jaw support part and a lower jaw support part were closed. It is a rear view of the main-body part of a support shaft fixing member.
  • A) is a figure explaining the state which inserts a support shaft fixing member from the side of a narrow part toward the upper groove 17 from the lower groove side
  • (B) is a figure which shows a support shaft fixing member in the lower groove. It is a figure explaining the state inserted from the side of the wide part toward the upper groove 17 from the side.
  • (A) is a state where the support shaft fixing member is inserted from the lower groove side toward the upper groove from the narrow portion side
  • (B) is a state where the support shaft fixing member is inserted from the lower groove side toward the upper groove. It is a figure which shows the state inserted from the side of the wide part. It is a figure explaining the relation of width of a lower groove, a wide part, and a narrow part. It is a figure explaining the relationship of the width
  • FIG. 1 It is a side view of the articulator concerning embodiment, and is a figure which shows the case where the angle (theta) between an upper jaw support part and a lower jaw support part is (theta) 2, (A) is an overall view, (B) is an enlarged view of a joint part. It is. It is a side view of the articulator which concerns on embodiment, Comprising: The figure which shows the case where the angle (theta) between an upper jaw support part and a lower jaw support part is (theta) 3, (A) is an overall view, (B) is an enlarged view of a joint part. It is.
  • FIG. 1 It is a side view of the articulator which concerns on embodiment, Comprising: The figure which shows the case where the angle (theta) between an upper jaw support part and a lower jaw support part is (theta) 4, (A) is an overall view, (B) is an enlarged view of a joint part. It is. It is a figure explaining attachment of a support shaft to an articulator. It is the figure which showed the state of the articulator with respect to a support shaft fixing member.
  • FIG. 1 is a perspective view showing a state where the articulator 1 according to the embodiment of the present invention is attached to a support shaft 70.
  • FIG. 2 is an exploded perspective view of the articulator 1 with the support shaft fixing member 80 removed.
  • FIG. 3 is a rear view of the articulator 1 with the support shaft fixing member 80 removed.
  • FIGS. 4A and 4B show a state in which the support shaft fixing member 80 is removed from the articulator 1 and the upper jaw support portion 10 and the lower jaw support portion 20 are closed.
  • FIG. 4A is an overall view
  • the articulator 1 supports an upper jaw model 40, an upper jaw support unit 10 supporting the upper jaw model 40, a lower jaw model 50, a lower jaw support unit 20 supporting the lower jaw model 50, and the upper jaw support unit 10 and the lower jaw support unit 20. And a support shaft fixing member 80 for fixing to the shaft 70.
  • the rear sides of the upper jaw support section 10 and the lower jaw support section 20 are rotatably connected to each other at a joint section 30 about an axis A extending left and right.
  • the front and rear, left and right, and up and down directions are defined with the side where the front teeth of the upper jaw model 40 and the lower jaw model 50 fixed to the articulator 1 are set as the front.
  • both of which are provided as a pair symmetrically and show both the left and right in the figure are denoted with R indicating the right side or L indicating the left side at the end of the reference numerals in the figure.
  • R and R indicating the right side and L and indicating the left side will be collectively described unless it is necessary to distinguish between the left and right sides.
  • the upper jaw support section 10 is integrally formed of a hard synthetic resin, and has a plate-shaped upper jaw fixing section 11 to which an upper jaw model 40 is fixed, a pair of upper jaw rear extending sections 12 extending rearward from the upper jaw fixing section 11, and And an upper connecting portion 13 for connecting the pair of upper jaw rear extending portions 12 to each other.
  • the upper jaw fixing part 11 has a horizontally long rectangular plate shape.
  • the upper jaw model 40 is provided with two bolt holes (not shown) symmetrically.
  • the upper jaw fixing part 11 is provided with two upper model mounting holes 111 a for inserting bolts into bolt holes provided in the upper jaw model 40.
  • Each of the two upper model mounting holes 111a of the upper jaw fixing portion 11 has a U-shape that opens downward.
  • the pair of maxillary rear extending portions 12 extend rearward from one end and the other end in the longitudinal direction on the rear surface of the maxillary fixing portion 11. As shown in FIG. 4, the pair of upper jaw rear extending portions 12 extend obliquely downward and rearward with the upper jaw model 40 fixed to the upper jaw fixing portion 11 being horizontally positioned.
  • the upper connecting portion 13 is a portion connecting the rear sides of the pair of maxillary rear extending portions 12, and a pair of rear cylindrical portions 14 provided on the rear sides of the pair of maxillary rear extending portions 12, respectively, and a rear cylinder.
  • An upper concave portion 15 for connecting the portions 14 to each other, a pair of spherical condylar heads 31 extending left and right from the rear cylindrical portion 14, and a stopper 19 extending forward of the upper concave portion 15 are provided.
  • a first engaging portion 61L, a second engaging portion 62L, and a third engaging portion 63L projecting radially outward of an axis A, which is also the axis of the rear cylindrical portion 14L, are provided on the lower left side of the left rear cylindrical portion 14L. Is provided.
  • three first engagement portions 61R, second engagement portions 62R, and third projections projecting radially outward of an axis A that is also the axis of the rear cylinder portion 14R are also provided on the right lower portion of the right rear cylinder portion 14R.
  • An engagement portion 63R is provided. As shown in FIG.
  • the first engagement portion 61 and the second engagement portion 62 are provided on the upper part of the rear cylindrical part 14.
  • the radial distance of the tip of the second engaging portion 62 from the axis A is greater than the radial distance of the tip of the first engaging portion 61 from the axis A.
  • the upper concave portion 15 connects the rear column portion 14 ⁇ / b> R and the rear column portion 14 ⁇ / b> L, the outer surface (front surface) protrudes forward, and the inner surface (rear surface) is concave forward. It is.
  • upper and lower portions 17 are provided in left and right portions facing each other, the upper groove 17 extending vertically and penetrating the lower end without penetrating the upper end.
  • the condylar head 31 is a part of the joint 30.
  • the condylar head 31 is a spherical member extending left and right from the posterior column 14, and the right condylar head 31 ⁇ / b> R projects rightward from the posterior column 14 provided at the rear of the right maxillary posterior extension 12,
  • the condylar head 31L protrudes leftward from a rear cylinder 14 provided at the rear of the left maxillary posterior extension 12 on the left.
  • the stopper 19 (shown in FIG. 4) protrudes forward from the upper concave portion 15 and extends. It has a downward surface 19a.
  • the lower jaw support portion 20 is integrally formed of a hard synthetic resin, and has a plate-shaped lower jaw fixing portion 21 to which the lower jaw model 50 is fixed, a pair of lower jaw rear extending portions 22 extending rearward from the lower jaw fixing portion 21, and , A lower connecting portion 23 that connects the pair of lower jaw rear extending portions 22 to each other.
  • the lower jaw fixing part 21 has a horizontally long rectangular plate shape.
  • the lower jaw model 50 is provided with two bolt holes (not shown) symmetrically.
  • the lower jaw fixing portion 21 is provided with two lower model mounting holes 211a for inserting bolts into bolt holes provided in the lower jaw model 50.
  • Each of the two lower model mounting holes 211a of the lower jaw fixing part 21 is a U-shaped opening upward.
  • the pair of lower back extension portions 22 extend rearward from one end and the other end in the longitudinal direction on the rear surface of the lower jaw fixing portion 21.
  • the pair of lower jaw rear extending portions 22 extend obliquely upward and rearward with the lower jaw model 50 fixed to the lower jaw fixing portion 21 positioned horizontally.
  • the lower connecting portion 23 is a portion connecting the rear sides of the pair of mandibular rearward extending portions 22, and extends right and left slightly below the condylar tract portion 32.
  • the lower connection portion 23 includes a pair of engagement receiving portions 33 on the lower jaw rear extension portion 22 side and a lower concave portion 35 provided between the engagement receiving portions 33 on both sides.
  • the condylar tract portion 32 is also a part of the joint portion 30, and is a pair of members provided on the rear side of the pair of mandibular posterior extension portions 22, respectively. It is a substantially U-shaped member that includes an upper wall portion 32a and a lower wall portion 32b whose rear sides extend diagonally rearward and upward in a side view, and are opened diagonally rearward and upward.
  • the inner surface on the proximal side (anterior side) of the condylar tract portion 32 is a concave curved surface portion corresponding to the shape of the condylar head 31.
  • the distance between the upper wall portion 32a and the lower wall portion 32b of the condylar path portion 32 gradually narrows from the diameter r of the condylar head 31 toward the posterior side.
  • An upper protruding portion 36a and a lower protruding portion 36b are provided on the rear side of the opposing surfaces of the upper wall portion 32a and the lower wall portion 32b, respectively, so as to protrude inward.
  • the distance w between the upper protrusion 36a and the lower protrusion 36b is smaller than the diameter r of the condylar head 31 and w ⁇ r. Since the condylar tract portion 32 holds the condylar head 31 on the front side (proximal side), the lower jaw support portion 20 is supported rotatably with respect to the upper jaw support portion 10 about the axis A.
  • the pair of engagement receiving portions 33 are provided slightly below the condyle path portions 32 on the side surfaces of the pair of mandibular posterior extension portions 22 facing each other, and the cross section orthogonal to the axis A is substantially rectangular. .
  • the lower concave portion 35 is a U-shaped member provided between the pair of engagement receiving portions 33, and the outer surface protrudes forward and the inner surface is depressed forward substantially similarly to the upper concave portion 15.
  • a lower groove 34 extending vertically and having an upper end and a lower end penetrating is formed in left and right portions facing each other. The lower groove 34 is aligned with the upper groove 17 when the lower jaw support 20 is at a predetermined angle with respect to the upper jaw support 10.
  • the front side of the lower concave portion 35 is a stopper receiving portion 35a, and its upward surface 35aa faces downward when the upper jaw supporting portion and the lower jaw supporting portion shown in FIG. 4 are closed (closed state). It contacts the surface 19a.
  • the support shaft fixing member 80 shown in FIG. 1 includes a main body 81 provided with a screw hole 81a extending forward and backward, and a screw member 82 screwed into the screw hole 81a.
  • 5A and 5B are diagrams showing the support shaft fixing member 80, wherein FIG. 5A is a diagram viewed from one side in the front-rear direction, FIG. 5B is a rear view, and FIG. 5C is a diagram viewed from the other side in the front-rear direction.
  • the main body 81 of the support shaft fixing member 80 has a wide portion 84 provided in each of the left and right directions, and a narrow portion 85 continuously extending from the wide portion 84 in the vertical direction.
  • the screw member 82 includes a screw portion 82a screwed into the screw hole 81a, and a screwdriver portion 82b provided at a rear end of the screw portion 82a.
  • FIG. 6A is a diagram illustrating a state where the support shaft fixing member 80 is inserted from the side of the narrow groove 85 toward the upper groove 17 from the side of the lower groove 34
  • FIG. It is a figure explaining the state where the body fixing member 80 is inserted from the side of the wide groove 84 toward the upper groove 17 from the lower groove 34 side.
  • 7A and 7B are diagrams illustrating the length (vertical length) of the wide portion 84 and the narrow portion 85 of the support shaft fixing member 80.
  • FIG. The state in which the support shaft fixing member 80 is inserted from the side of the narrow groove 85 toward the upper groove 17 from the side of the lower groove 34 toward the upper groove 17 is shown in FIG. It is in the inserted state.
  • 7A and 7B show a state in which the upper groove 17 and the lower groove 34 are substantially aligned.
  • FIG. 8 is a view for explaining the relationship between the width of the lower groove 34 and the width of the wide portion 84 and the narrow portion 85.
  • FIG. 9 is a diagram illustrating the relationship between the width of the upper groove 17, the wide portion 84, and the narrow portion 85.
  • the inner surface of the lower groove 34 has a front surface 34f, a rear surface 34b, and a side surface 34s.
  • the distance SW between the outer edges of the narrow portions 85 provided on the left and right is shorter than the distance DWI between the inner edges of the rear surfaces of the lower grooves 34 provided on the left and right.
  • the distance LW between the outer edges of the wide portions 84 provided on the left and right is longer than the distance DWI between the inner edges of the rear surfaces of the lower grooves 34 provided on the left and right. That is, assuming that the distance DWO between the side surfaces of the lower groove 34 provided on the left and right is as follows. SW ⁇ DWI ⁇ LW ⁇ DWO (2)
  • the inner surface of the upper groove 17 includes a front surface 17f, a rear surface 17b, and a side surface 17s.
  • the distance SW between the outer edges of the narrow portions 85 provided on the left and right is longer than the distance UWI between the inner edges of the rear surfaces of the upper grooves 17 provided on the left and right.
  • the distance LW between the outer edges of the wide portions 84 provided on the left and right is longer than the distance UWI between the inner edges of the rear surfaces of the upper grooves 17 provided on the left and right. That is, the distance UWO between the side surfaces of the upper groove 17 provided on the left and right has the following relationship. There is the following relationship. UWI ⁇ SW ⁇ LW ⁇ UWO (3)
  • the upper jaw fixing portion 11 is arranged on the rear surface of the upper jaw model 40, and a pair of bolt holes (not shown) of the upper jaw model 40 is aligned with a pair of upper model mounting holes 111 a of the upper jaw fixing portion 11.
  • the upper jaw model 40 is fixed to the front surface of the upper jaw fixing unit 11 by screwing a bolt 111 into a bolt hole of the upper jaw model 40 from a pair of upper model mounting holes 111 a of the upper jaw fixing unit 11.
  • the lower jaw fixing portion 21 is disposed on the rear surface of the lower jaw model 50, and a pair of bolt holes (not shown) of the lower jaw model 50 is aligned with a pair of lower model mounting holes 211 a of the lower jaw fixing portion 21.
  • the lower jaw model 50 is fixed to the front surface of the lower jaw fixing unit 21 by screwing a bolt 211 from a pair of lower model mounting holes 211a of the lower jaw fixing unit 21 into a bolt hole (not shown) of the lower jaw model 50.
  • the upper model fixing hole 11a and the lower model mounting hole 111a for the upper model fixing unit 11 and the lower jaw fixing unit 21 are used. Since the hole 211a is U-shaped, the bolts 111 and 211 can be separated from the upper jaw model 40 and the lower jaw model 50 only by loosening them without completely removing them. Therefore, it is possible to easily mount different upper jaw models 40 on the upper jaw support unit 10 and mount different lower jaw models 50 on the lower jaw support unit 20.
  • the upper model mounting hole 111a of the upper jaw fixing part 11 is U-shaped opening downward, first, the bolt 111 is inserted into the bolt hole of the upper jaw model 40, and between the rear surface of the upper jaw model 40 and the bolt head. Keep gaps open. Next, the upper jaw fixing part 11 is inserted into the gap from above. By further screwing the bolt 111, the upper jaw support 10 can be attached to the upper jaw model 40. In this manner, the upper jaw fixing portion 11 can be easily attached to the upper jaw model 40.
  • the lower model mounting hole 211a of the lower jaw fixing part 21 is also U-shaped opening upward, the bolt 211 is first inserted into the bolt hole of the lower jaw model 50, and the lower surface of the lower jaw model 50 and the bolt head are connected. Keep gaps between them. Next, the lower jaw model 50 is inserted into the gap from below. By further screwing the bolt 211, the lower jaw fixing portion 21 can be easily attached to the lower jaw model 50.
  • the pair of condylar heads 31 are attached to the pair of condylar tracts 32, respectively.
  • the condylar head 31 is inserted from the rear side between the upper protrusion 36a and the lower protrusion 36b of the U-shaped condyle path 32.
  • the distance w between the upper protrusion 36a and the lower protrusion 36b is smaller than the diameter r of the condyle head 31, when the condyle head 31 is inserted between the upper protrusion 36a and the lower protrusion 36b.
  • the upper wall portion 32a and the lower wall portion 32b are elastically deformed to increase the space therebetween, and the condylar head 31 gets over the upper protrusion 36a and the lower protrusion 36b and is inserted into the inside of the U-shape.
  • the condylar head 31 moves toward the U-shaped bottom (proximal side, anterior side) of the condylar tract portion 32, the upper wall portion 32a and the lower wall portion 32b return to their original state from the elastic deformation, and move upward.
  • the distance w between the protrusion 36a and the lower protrusion 36b returns to a state smaller than the diameter r of the condylar head 31.
  • the condylar head 31 does not come off unless an external force is applied.
  • the condylar head 31 and the condylar tract portion 32 form the joint 30, and the condylar head 31 is rotatably held at the U-shaped bottom (proximal side, anterior side) of the condylar tract portion 32.
  • the rear sides of the upper jaw support section 10 and the lower jaw support section 20 are rotatably connected to each other at the joint section 30 around an axis A extending left and right.
  • the first state (the angle ⁇ between the upper jaw support section 10 and the lower jaw support section 20 is ⁇ 1) in which the upper jaw support section 10 and the lower jaw support section 20 are closed shown in FIG. This is a normal occlusal position in the case of the jaw.
  • the first engagement portion 61 and the second engagement portion 62 projecting radially outward from the axis A provided at the lower portion of the rear column portion 14 are located behind the engagement receiving portion 33 having a rectangular cross section. ing.
  • the first engagement portion 61 engages with the engagement receiving portion 33. Abut Further, in order to move the upper jaw support portion 10 and the lower jaw support portion 20 in a direction in which they are opened from each other, the first engagement portion 61 needs to get over the engagement receiving portion 33, and at this time, the condylar head 31 is moved to the upper wall portion.
  • the space 32a and the lower wall 32b are elastically deformed to move backward in the U-shaped gap indicated by the arrow X2. Therefore, for example, unless the operator intentionally applies a force to open, the upper jaw support section 10 and the lower jaw support section 20 do not open.
  • the upper jaw support part 10 and the lower jaw support part 20 do not approach any more. Therefore, for example, even if at least one of the upper jaw model 40 and the lower jaw model 50 is an edentulous jaw, it can be held at the normal occlusal position in the case of the edentulous jaw shown in FIG.
  • FIG. 10 is a side view of the articulator 1 and shows a case where the angle ⁇ between the upper jaw support portion 10 and the lower jaw support portion 20 is ⁇ 2 which is a second angle larger than ⁇ 1, and FIG. FIG. 2B is an enlarged view of the joint.
  • the condylar head 31 elastically deforms the upper wall portion 32a and the lower wall portion 32b and moves to the rear of the U-shaped gap.
  • the joining portion 61 gets over the corner portion of the engagement receiving portion 33 to be in a state shown in FIG.
  • a rear upper corner portion of the engagement receiving portion 33 is located between the first engagement portion 61 and the second engagement portion 62.
  • the condylar head 31 is not completely in contact with the bottom (base end, front side) of the U-shaped gap, and the upper wall 32a and the lower wall 32b are slightly elastically deformed. Therefore, the condylar head 31 is pushed in the direction of arrow X3 in the figure by the force of returning to the upper wall portion 32a and the lower wall portion 32b. Therefore, the first engagement portion 61 is pressed toward the engagement receiving portion 33, and the upper jaw support portion 10 and the lower jaw support portion 20 are fixed at the positions shown in FIG.
  • FIG. 11 is a side view of the articulator 1 and shows a case where the angle ⁇ between the upper jaw support portion 10 and the lower jaw support portion 20 is ⁇ 3 which is larger than ⁇ 2.
  • FIG. () Is an enlarged view of the joint.
  • the condylar head 31 elastically deforms the upper wall portion 32a and the lower wall portion 32b, and moves to the rear of the U-shaped gap.
  • the joining portion 62 gets over the corner portion of the engagement receiving portion 33, and becomes a state shown in FIG.
  • the radial distance y2 shown in FIG.
  • the upper jaw model 40 exerts a force by its own weight in a direction to reduce the angle ⁇ .
  • the rear side of the second engagement portion 62 is in contact with the upper surface of the engagement receiving portion 33.
  • the condylar head 31 cannot elastically deform the upper wall portion 32a and the lower wall portion 32b to move behind the U-shaped gap with the force of the own weight of the upper jaw model 40, and the upper jaw support portion 10 and the lower jaw support The part 20 is held at the position shown in FIG.
  • FIG. 12 is a side view of the articulator 1 and shows a case where the angle ⁇ between the upper jaw support portion 10 and the lower jaw support portion 20 is a fourth angle ⁇ 4 that is larger than ⁇ 3.
  • FIG. (B) is an enlarged view of the joint.
  • the space between the upper jaw support section 10 and the lower jaw support section 20 can be held in the first state ⁇ 1, the second state ⁇ 2, the third state ⁇ 3, and the fourth state ⁇ 4.
  • the angle between the lower jaw support part 10 and the lower jaw support part 20 can be maintained, and it is easy to work when manufacturing a denture or a dental prosthesis.
  • FIG. 13 is a view for explaining a method of attaching the support shaft 70 to the articulator 1.
  • the support shaft 70 has a columnar shape, and a flat portion 71 is provided on a part of the circumference along the longitudinal direction.
  • the flat portion 71 has a screw insertion hole 72.
  • the curve of the circumference of the support shaft 70 substantially matches the curve of the inner surface (rear surface) of the upper concave portion 15 and the lower concave portion 35 (not shown in FIG. 13).
  • the support shaft 70 is brought into contact with the inner surfaces of the upper concave portion 15 and the lower concave portion 35 provided behind the upper jaw support portion 10 and the lower jaw support portion 20 to keep the upper jaw support portion 10 and the lower jaw support portion 20 constant.
  • the upper groove 17 and the lower groove 34 are aligned on a straight line. 6A or 6B, the wide portion 84 and the narrow portion 85 of the main body 81 are inserted into the upper groove 17 and the lower groove 34 that are aligned with each other. Attach the main unit. Then, when the screw driver 82b is rotated with the tip of the screw portion 82a inserted in the screw insertion hole 72, the tip of the screw portion 82a is inserted into the screw insertion hole 72, and the articulator 1 is moved. The support shaft 70 is held at a predetermined position.
  • the lower end of the support shaft holding the articulator is erected on a fixed base, and the head is attached to the upper end.
  • a general articulator different from the present embodiment is provided with a vertically extending through hole at a rear portion.
  • the support shaft fixing member 80 is removed from the upper groove 17 and the lower groove 34. Then, the support shaft 70 is relatively moved to the rear side in the horizontal direction orthogonal to the axis of the support shaft 70 (the side opposite to the upper jaw model 40 and the lower jaw model 50), and the upper concave portion 15 and the lower concave portion 35 which are the concave portions. And move from. Thereby, it is possible to attach / detach from / to the articulator 1 from the support shaft 70 without removing a head unit and a fixing stand (not shown) from the support shaft 70. Therefore, attachment and detachment are easy.
  • FIG. 6 (A) when inserted from the side of the narrow groove 85 from the side of the lower groove 34 toward the upper groove 17, the state of FIG. 7 (A) is obtained.
  • the wide portion 84 below the narrow portion 85 is engaged with the upper groove 17 and the lower groove 34. Therefore, the movement of the upper jaw supporting portion 10 provided with the upper groove 17 is restricted by the wide portion 84, and the lower jaw supporting portion 20 provided with the lower groove 34 is also in a fixed state in which the movement is restricted.
  • FIG. 6B when inserted from the side of the wide groove 84 toward the upper groove 17 from the side of the lower groove 34, the state shown in FIG. 7B is obtained.
  • the wide portion 84 engages with the upper groove 17. Therefore, the movement of the upper jaw supporting portion 10 provided with the upper groove 17 is restricted.
  • the rear surface 34b of the lower groove 34 is not covered by the rear surface of the narrow portion 85 at the position corresponding to the lower groove 34, the lower jaw supporting portion 20 provided with the lower groove 34 can be rotated forward. Therefore, by changing the insertion direction of the support shaft fixing member 80 into the lower groove 34 and the upper groove 17 depending on the use of the user, whether the lower jaw support portion 20 is fixed in the state of being held on the support shaft 70 is determined. It is possible to select whether to be rotatable.
  • FIG. 14 is a view showing the state of the articulator 1 when the support shaft fixing member 80 is loosened.
  • the upper end of the upper groove 17 is not open. Therefore, as illustrated, the upper end wall 17a of the upper groove 17 is supported in contact with the upper end of the wide portion 84 (the narrow portion 85 depending on the direction) of the main body portion 81. For this reason, when the screwdriver portion 82b is rotated to loosen the support shaft fixing member 80, a force is applied to the articulator 1 downward by gravity, but as long as the operator holds the screwdriver portion 82b, The container 1 is prevented from falling.
  • the condylar head 31 is provided on the upper jaw support part 10 and the condylar tract part 32 is provided on the lower jaw support part 20, but the present invention is not limited to this. That is, the condyle path may be provided on the upper jaw support, and the protrusion may be provided on the lower jaw support.
  • the condylar head 31 is configured in a spherical shape, but is not limited thereto, and may be configured in a columnar shape, for example.
  • the present invention can be suitably used for an articulator for training used for educational training and guidance, and a technical articulator used for manufacturing dentures and dental prostheses.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)
PCT/JP2018/036024 2018-09-27 2018-09-27 咬合器 WO2020065847A1 (ja)

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JP2020547738A JP6951808B2 (ja) 2018-09-27 2018-09-27 咬合器
CN201880098106.6A CN112770693B (zh) 2018-09-27 2018-09-27 咬合器

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN113995621A (zh) * 2020-11-12 2022-02-01 上海交通大学医学院附属第九人民医院 一种数字化下颌前伸运动辅助训练器及其构建方法
EP4156150A4 (en) * 2020-08-05 2023-07-05 Nissin Dental Products Inc. DENTAL MODEL AND ARTICULATOR

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JP2012192166A (ja) * 2011-02-28 2012-10-11 Trimunt Corp 咬合器
JP2015158592A (ja) * 2014-02-24 2015-09-03 学校法人神奈川歯科大学 歯科用マネキン

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KR101016046B1 (ko) * 2009-03-11 2011-02-23 (주)보원덴탈 치아모형 교합기
KR20100135471A (ko) * 2009-06-17 2010-12-27 주식회사 덴트컴 교합기
JP6047740B2 (ja) * 2011-02-14 2016-12-21 株式会社ニッシン 咬合器
CN103027759A (zh) * 2011-10-09 2013-04-10 日进教学器材(昆山)有限公司 可调节式咬合器
KR101117342B1 (ko) * 2011-10-14 2012-03-07 김세훈 교합기

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JP2012192166A (ja) * 2011-02-28 2012-10-11 Trimunt Corp 咬合器
JP2015158592A (ja) * 2014-02-24 2015-09-03 学校法人神奈川歯科大学 歯科用マネキン

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4156150A4 (en) * 2020-08-05 2023-07-05 Nissin Dental Products Inc. DENTAL MODEL AND ARTICULATOR
CN113995621A (zh) * 2020-11-12 2022-02-01 上海交通大学医学院附属第九人民医院 一种数字化下颌前伸运动辅助训练器及其构建方法

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CN112770693A (zh) 2021-05-07
JP6951808B2 (ja) 2021-10-20
CN112770693B (zh) 2022-06-03
JPWO2020065847A1 (ja) 2021-08-30

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