JP2008154927A - Maxillary artificial teeth and mandibular artificial teeth - Google Patents

Abstract

An object of the present invention is to provide a maxillary artificial dentition and a mandibular artificial dentition capable of easily making a functionally good denture without obstructing a three-dimensional mandibular movement about a temporomandibular joint. .
A maxillary artificial tooth row 10 according to the present invention includes a plurality of artificial teeth (10L1 to 10L7, 10R1 to 10R7) connected so as to correspond to all teeth on a person's upper jaw, and the plurality of artificial teeth. In this configuration, the tips of the teeth (10L1 to 10L7, 10R1 to 10R7) are arranged along a predetermined spherical concave surface C. Further, the mandibular prosthetic dentition 20 according to the present invention is arranged such that a plurality of artificial teeth (20L1 to 20L7, 20R1 to 20R7) are engaged with the maxillary artificial dentition 10, so that all of the mandibular prosthesis side is arranged. It becomes the structure connected so that it might respond | correspond to a tooth | gear.
[Selection] Figure 9

Description

  The present invention relates to a maxillary artificial tooth and a mandibular artificial tooth used for making a denture.

  When creating a maxillary denture (all dentures), it is generally necessary to form a braze on the edentulous jaw model and arrange the artificial teeth one by one while softening the braze by heating. Done. The arrangement of the artificial teeth must be adapted to the patient's jaw movement, and the arrangement work requires skill and takes a lot of time.

Then, the connection tooth (artificial tooth row | line | column) which connected the some artificial tooth is proposed (refer patent document 1). If such a connection tooth is used, the work man-hour in the arrangement | sequence work can be reduced compared with the case where an artificial tooth is arranged one by one.
JP-A-6-261919

  By the way, as shown in FIG. 1 (a), the upper jaw MX and the lower jaw MN of the human are arranged along a certain curved surface C1 (curve such as a Spee curve) having a molar portion from the front tooth part. In addition, as shown in FIG. 1B, the horizontal direction is also arranged along a certain curved surface C2 (a curved line such as a Wilson curved line). If the bending state as described above is not maintained in the dentition of the maxilla MX and the dentition of the mandible MN that are to be occluded with each other, side pressure that is harmful to the molar portion or the like in the movement of the mandible MN with the temporomandibular joint as a fulcrum There is a risk of taking.

  The artificial tooth arrangement in the conventional connecting tooth as described above is simply arranged along a standard dental arch that becomes a two-dimensional reference, and the three-dimensional mandibular movement as described above is performed. It is not considered at all. Therefore, in order to create a functionally good denture that does not apply harmful side pressure, various adjustment work is required by attaching it to an actual patient, and accordingly, appropriate skills are required. There is no.

  The present invention has been made in view of such circumstances, and the maxillary artificial tooth capable of easily making a functionally good denture without inhibiting three-dimensional mandibular movement with the temporomandibular joint as a fulcrum. A row and a mandibular artificial tooth row are provided.

  In the maxillary artificial tooth row according to the present invention, a plurality of artificial teeth are arranged so as to correspond to all teeth on the upper jaw side of a person, and the tips of the plurality of artificial teeth are arranged along a predetermined spherical concave surface. It becomes the composition.

  With such a configuration, since a plurality of artificial teeth are connected so as to correspond to all teeth on the upper jaw side, it is not necessary to perform the operation of arranging artificial teeth one by one when making dentures, and the arrangement work is extremely It becomes easy. In addition, since the tip portions of the plurality of artificial teeth are arranged along a predetermined spherical concave surface, a structure that takes into account the three-dimensional movement of the lower jaw with the temporomandibular joint as a fulcrum in the denture on the upper jaw side can be easily obtained. It can be realized.

  Further, in the maxillary artificial tooth row according to the present invention, the center of the spherical concave surface is a straight line connecting the left second premolar and the right first premolar in the plurality of artificial teeth, the left first premolar and the right first It can be set as the structure set on the line extended in the perpendicular upper direction from the intersection of the straight line which connects 2 molars.

  With such a configuration, the intersection of the straight line connecting the left second premolar and the right first premolar and the straight line connecting the left first premolar and the right second premolar can be a point on the midline, A spherical concave surface centered on a point on a line extending in the vertical direction from the intersection point could be closer to the curved surface along which the tip of the maxillary dentition of many dental patients should follow.

  Further, in the maxillary artificial tooth row according to the present invention, the plurality of artificial teeth can be configured as an integral structure.

  With such a configuration, since the plurality of artificial teeth have an integrated structure, there is no need to combine the individual artificial teeth when making such an artificial tooth row, and the artificial teeth can be made more easily. .

  The integral structure can be realized by integral molding of a predetermined material. For example, the maxillary artificial tooth row can be formed by integrally molding a plurality of artificial teeth by injection molding using a hard resin as a material. Moreover, the said integral structure can also be implement | achieved by cutting out from a predetermined raw material. For example, the maxillary artificial tooth row can be formed by integrally forming a plurality of artificial teeth by cutting out from a material such as a hard resin.

  The mandibular artificial dentition according to the present invention is arranged such that a plurality of artificial teeth are engaged with any of the aforementioned maxillary prosthetic dentitions, and are connected so as to correspond to all teeth on the mandibular side. It becomes the composition which becomes.

  With such a configuration, since a plurality of artificial teeth are connected so as to correspond to all teeth on the lower jaw side, it is not necessary to perform an operation of arranging artificial teeth one by one when making dentures, and the arrangement work is extremely It becomes easy. In addition, since the plurality of artificial tooth rows are arranged so that the tip portions of the plurality of artificial teeth mesh with the upper jaw side artificial tooth row arranged along a predetermined spherical concave surface, in the denture on the lower jaw side, A structure considering the three-dimensional movement of the lower jaw with the joint as a fulcrum can be easily realized.

  According to the maxillary artificial tooth row and the mandibular side artificial tooth row according to the present invention, it becomes very easy to arrange artificial teeth when making dentures. In each denture, the three-dimensional lower jaw with the temporomandibular joint as a fulcrum is used. Since a structure that takes into account the typical movement will be easily realized, a functionally good denture can be easily created without obstructing the three-dimensional mandibular movement with the temporomandibular joint as a fulcrum. Become.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  The maxillary artificial tooth row according to the embodiment of the present invention is configured as shown in FIGS. 2 shows a state (a) seen from the front of the maxillary artificial dentition and a state (b) seen from the right side thereof, and FIG. 3 is seen from the occlusal surface side of the maxillary artificial dentition. Indicates the state.

  2 and 3, the maxillary artificial tooth row 10 includes a plurality of artificial teeth 10L1 to 10L7 and 10R1 to 10R7, which are all teeth on the upper jaw side of a person, specifically, left central incisor (10L1), left side. Incisor (10L2), left canine (10L3), left first premolar (10L4), left second premolar (10L5), left first premolar (10L6) and second premolar (10L7), right middle Incisor (10R1), right incisor (10R2), right canine (10R3), right first premolar (10R4), right second premolar (10R5), first molar (10R6) and second molar ( 10R7), and is connected along a standard dental arch Q (see FIG. 3). Hereinafter, the artificial teeth 10L1 to 10L7 and 10R1 to 10R7 are referred to by the same names as the corresponding human teeth.

  The tips of the plurality of artificial teeth 10L1 to 10L7 and 10R1 to 10R7 corresponding to all the human teeth are arranged along a predetermined spherical concave surface C (see FIG. 2). The spherical concave surface C is determined as follows.

  As shown in FIG. 4, the intersection point P of the straight line L1 connecting the left second molar 10L7 and the right first premolar 10R4 and the straight line L2 connecting the left first premolar 10L4 and the right second molar 10R7 is , On the midline Lc, and can be regarded as a reasonable reference point for mandibular movement such as canine guidance. Therefore, as shown in FIGS. 5 and 6, the center O of the spherical concave surface C exists on the straight line Lo extending vertically upward from the intersection P between the straight lines L1 and L2. The spherical concave surface C is determined so that the lowest point Po is on the straight line Lo where the center O is set. Then, the center O of the spherical concave surface C was finally determined so that the radius SR of the spherical concave surface C was 124 mm. Such a spherical concave surface C better represents the curved surface (see FIG. 1) that the maxillary dentition should follow, based on the results obtained by the inventors of the present invention by collecting and examining the dentition of a large number of dental patients. It was. However, the radius SR of the spherical concave surface C can be appropriately set according to the age, sex, and jaw structure (such as the size of the jaw). In the case of a general adult, the radius SR of the spherical concave surface C is preferably set within a range of 124 mm ± 5%.

  In addition, each of the artificial teeth 10L1 to 10L7 and 10R1 to 10RL constituting the maxillary artificial tooth row 10 stands along a straight line (see each broken line) extending from each point of the spherical concave surface C toward its center O. It is in a state.

  As described above, it passes through the intersection P between the straight line L1 connecting the left second molar 10L7 and the right first premolar 10R4 and the straight line L2 connecting the left first premolar 10L4 and the right second molar 10R7. A point Po set on the spherical concave surface C on the vertical line Lo is a point that can be regarded as a reasonable reference point for mandibular movement, and this point Po is referred to as an “occlusion origin”.

  As described above, the plurality of artificial teeth 10L1 to 10L7 and 10R1 to 10R7 are connected so as to correspond to all the teeth on the upper jaw side, and the tips of the plurality of artificial teeth 10L1 to 10L7 and 10R1 to 10R7 are spherical concave surfaces. The maxillary artificial tooth row 10 arranged along C is not connected to separate artificial teeth but has an integral structure. The maxillary artificial dentition 10 can be integrally formed by, for example, injection molding of a hard resin, which is a general artificial tooth material. It is also possible to form by cutting out.

  In this way, the maxillary artificial tooth row 10 having an integral structure can be easily manufactured using a molding machine such as an injection molding machine, NC equipment, or the like, without performing an operation of connecting the artificial teeth. Can be made with high accuracy.

  When making a denture using the above-described maxillary artificial tooth row 10, only the work of embedding the maxillary side artificial tooth row 10 in the bran is performed, and it is not necessary to perform the work of arranging the artificial teeth one by one as in the prior art. . 7 and 8, the maxillary denture 100 is formed on a denture base 15 in which the maxillary artificial tooth row 10 is formed of a resin material such as acrylic resin or a metal material such as cobalt chrome or a gold alloy. It is fixed and completed. 7A is a diagram showing a state seen from the front of the maxillary denture 100, and FIG. 7B is a diagram showing a state seen from the right side of the maxillary denture 100. 8 is a view showing a state of the maxillary denture 100 as seen from the occlusal surface side.

  The denture 100 using the maxillary artificial dentition 10 as described above better represents the saddle curved surface (see FIG. 1) where the tip of each artificial tooth of the artificial dentition 10 should be along with the actual maxillary dentition. The structure is arranged along the spherical concave surface C. Therefore, the dentures 00 have a structure that takes into account the three-dimensional mandibular movement with the temporomandibular joint as a fulcrum, and can be functionally good without hindering the mandibular movement.

  Next, with reference to FIG. 9, the mandibular side artificial tooth row will be described. FIG. 9A is a diagram showing a state seen from the front of the mandibular prosthetic dentition engaged with the maxillary artificial dentition, and FIG. 9B is an occlusion with the maxillary artificial dentition. It is a figure which shows the state seen from the right side of the manufactured mandibular side artificial tooth row | line | column.

  9 (a) and 9 (b), the mandibular artificial tooth row 20 includes a plurality of artificial teeth 20L1 to 20L7 and 20R1 to 20R7, with the tip of each artificial tooth extending along the spherical concave surface C as described above. It is arranged so as to properly bite the maxillary artificial tooth row 10 which is an arranged structure, and has a structure which is connected so as to correspond to all teeth on the lower jaw side of a person. In addition, the lower jaw artificial tooth row 20 is not formed by connecting separate artificial teeth like the upper jaw side artificial tooth row 10 but has an integral structure, for example, a material such as a hard resin by injection molding or It is formed by cutting out from materials such as hard resin with NC equipment.

  When making dentures using the above-described artificial lower teeth 20, it is only necessary to embed the lower artificial teeth 20 in the braze, and there is no need to arrange artificial teeth one by one as in the prior art. . Then, as shown in FIGS. 10A and 10B, the lower denture side denture 200 is completed by fixing the lower jaw side artificial tooth row 20 to the denture base 25. 10A is a diagram showing a state viewed from the front of the lower jaw denture 200 that meshes with the maxillary denture 100, and FIG. 10B shows the lower denture 200 that meshes with the maxillary denture 100. It is a figure which shows the state seen from the right side.

  The denture 200 as described above is a maxillary artificial dentition formed by a plurality of artificial teeth arranged along a spherical concave surface C that better represents the curved surface (see FIG. 1) that the actual maxillary dentition should follow. 10 has a structure in which the mandibular prosthesis 20 is properly occluded, and therefore the denture 200 has a structure that takes into account a three-dimensional mandibular movement with the temporomandibular joint as a fulcrum. It can be functionally good without being inhibited itself.

  In the above-described example, the maxillary artificial dentition 10 connected so as to correspond to all teeth on the mandible and the mandibular dentition 20 connected so as to correspond to all teeth on the mandible of the person as they are. Although it was described as being used for the maxillary denture (full denture) 100 and the mandibular total denture (full denture) 200, it was partially made using the maxillary artificial teeth 10 and mandibular artificial teeth 20 described above. Dentures (partial dentures) can be made. In this case, a necessary artificial tooth portion is cut out from the maxillary artificial tooth row 10 or the mandibular side artificial tooth row 20 having an integral structure by injection molding or the like, and a denture is formed using the cut out artificial tooth row portion. It is done. For example, as shown in FIGS. 11 (a) and 11 (b), the maxillary left artificial dentition portion 10L, which is a portion of the artificial teeth 10L1 to 10L7, is cut out from the maxillary artificial dentition 10 and used. A left partial denture can be made. Further, for example, as shown in FIGS. 12A and 12B, the maxillary right artificial dental arch portion 10 </ b> R that becomes the artificial teeth 10 </ b> R <b> 1 to 10 </ b> R <b> 7 is cut out from the maxillary artificial dentition 10 and used. You can make a right partial denture on the side.

  As described above, the maxillary artificial teeth and mandibular artificial teeth according to the present invention facilitate functionally good denture without obstructing the three-dimensional mandibular movement with the temporomandibular joint as a fulcrum. It has the effect that it can be made, and is useful as a dental maxillary artificial dentition and mandibular artificial dentition.

It is a figure which shows the state (a) seen from the left side of the upper jaw and lower jaw of the person who bite, and the state (b) seen from the front. It is a figure which shows the state (a) seen from the front of the upper jaw side artificial tooth row which concerns on one Embodiment of this invention, and the state (b) seen from the right side. It is a figure which shows the state seen from the occlusal surface side of the maxillary artificial dentition which concerns on one Embodiment of this invention. It is a figure which shows the arrangement | sequence state of each artificial tooth in an upper jaw side artificial tooth row | line | column. It is a side view which shows the spherical concave surface which the front-end | tip part of each artificial tooth which comprises an upper jaw side artificial tooth row | line | column follows. It is a front view which shows the spherical concave surface which the front-end | tip part of each artificial tooth which comprises an upper jaw side artificial tooth row | line | column follows. It is a figure which shows the state (a) seen from the front of the denture (maxillary side denture) made using the upper jaw side artificial tooth row | line, and the state (b) seen from the right side. It is a figure which shows the state seen from the occlusal surface side of the denture (maxillary side denture) made using the maxillary side artificial tooth row | line | column. It is a figure which shows the state (a) seen from the front of the lower jaw side artificial tooth row | line | column appropriately biting to the upper jaw side artificial tooth row | line | column, and the state (b) seen from the right side. It is a figure which shows the state (a) seen from the front of the lower jaw side denture engaged with the upper jaw side denture, and the state (b) seen from the right side. It is a figure which shows the state (a) seen from the front of the maxillary side left artificial tooth row | line | column cut out from the upper jaw side artificial tooth row | line | column, and the state (b) seen from the occlusal surface side. It is a figure which shows the state (a) seen from the right eye of the upper jaw side right artificial tooth row | line | column part cut out from the upper jaw side artificial tooth row | line | column, and the state (b) seen from the occlusal surface side.

Explanation of symbols

10 maxillary artificial dentition 10R maxillary right artificial dentition 10L maxillary left artificial dentition 15 denture base 20 mandibular prosthesis 25 denture base

Claims (6)

  A maxillary artificial tooth characterized in that a plurality of artificial teeth are connected so as to correspond to all teeth on a person's maxillary side, and tips of the artificial teeth are arranged along a predetermined spherical concave surface Column.   The center of the spherical concave surface is vertically upward from the intersection of the straight line connecting the left second premolar and the right first premolar and the straight line connecting the left first premolar and the right second premolar in the plurality of artificial teeth. The artificial tooth row according to claim 1, wherein the artificial tooth row is set on a line extending in a straight line.   The artificial tooth row according to claim 1, wherein the plurality of artificial teeth have an integral structure.   The maxillary artificial tooth row according to claim 3, which is formed by integral molding of a predetermined material.   The maxillary artificial tooth row according to claim 3, which is formed by cutting out from a predetermined material.   A plurality of artificial teeth are arranged so as to be engaged with the maxillary artificial dentition according to any one of claims 1 to 7, and are connected so as to correspond to all teeth on the mandibular side of a person. Mandibular artificial dentition.

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