JP2022044305A - Occlusal plane reproduction device and occlusal plane reproduction method - Google Patents

Abstract

To provide an occlusal plane reproduction device and occlusal plane reproduction method directly reproducing an occlusal plane in an oral cavity of a patient whose tooth in dentition is partially defected, and whose remaining teeth of the dentition are extruded from the occlusal plane or located at a lower position than the occlusal plane.SOLUTION: An occlusal plane reproduction device 1 comprises: a Camper's plane measuring unit 10 including a pair of tragus upper edge contact parts 11a and 11b to be brought into contact with upper edges of left/right tragi 4 of a patient, nasal wing lower edge contact parts 13 to be brought into contact of the lower edges of the nasal wings 5 of the patient, and an arm part 15 holding the tragus upper edge contact parts 11a and 11b and the nasal wing lower edge contact parts 13 on the Camper's plane; an occlusal plane instruction unit 30 including a virtual occlusal plane instruction part 31 traveling, in the oral cavity of the patient, a position on a virtual occlusal plane extending parallel to the Camper's plane and the position transitioning to a cheek side or a lip side with respect to a virtual dentition in the virtual occlusal plane; and a support 20 for translatably connecting the Camper's plane measuring unit 10 and the occlusal plane instruction unit 30.SELECTED DRAWING: Figure 2

Description

The present invention relates to an occlusal plane reproduction device and an occlusal plane reproduction method using the occlusal plane reproduction device.

Patients with partially missing teeth in the dentition are treated with a prosthetic device in the oral cavity to restore the lost jaw function. In the case of a patient with a large number of missing teeth, it is necessary to reconstruct the occlusal plane. , X-ray, CT and other images are used for analysis.

Japanese Patent Application Laid-Open No. 2003-220079 Japanese Unexamined Patent Publication No. 2016-087401

However, in the above method, the occlusal plane is indirectly analyzed, and it is difficult to analyze the occlusal plane directly in the oral cavity of the patient.

There is a method of analyzing the occlusal plane by inserting the occlusal plane setting plate used for all floor dentures into the oral cavity. However, in a patient with a partially missing tooth in the dentition, if the facing tooth of the maxilla or mandible is missing or the crown morphology is significantly damaged, the remaining tooth becomes the occlusal plane. May be ejected from. In that case, it is necessary to prepare an occlusal plane setting plate provided with a through hole according to the position of the remaining teeth of the patient for each patient (for example, Patent Document 2).

The present invention has been made in view of the above circumstances, and the teeth in the dentition are partially missing, and the remaining teeth of the dentition are protruding from the occlusal plane or lower than the occlusal plane. An exemplary subject is an occlusal plane reproduction device and an occlusal plane reproduction method that directly reproduces the occlusal plane in the patient's oral cavity.

In order to solve the above problems, the present invention has the following configurations.
(1) A pair of upper ears abutting portions abutting on the upper edges of the left and right ears of a patient, a lower rim abutting portion of the nasal wing abutting on the lower edge of the nasal wing of the patient, and the pair of ears. A camper plane measurement having an arm portion that holds the bead upper edge contact portion and the nose wing lower edge contact portion on a camper plane including the three points of the left and right ear bead upper edges and the nose wing lower edge. The unit and the position in the oral cavity of the patient on the virtual occlusal plane extending parallel to the Campel plane and transitioning to the buccal or labial side from the virtual dentition in the virtual occlusal plane. The occlusal plane indicating unit having a traveling virtual occlusal plane indicating unit, the campel plane measuring unit, and the occlusal plane indicating unit are maintained in a state where the virtual occlusal plane indicating unit is parallel to the campel plane. An occlusal plane reproduction device equipped with struts that are movably connected.

(2) A campel plane measuring step for measuring a campel plane including three points of the upper edge of the left and right ears of the patient and the lower edge of the nose wing of the patient, and parallel to the campel plane in the oral cavity of the patient. An occlusal plane reproduction method comprising a occlusal plane instruction step of indicating a position on a virtual occlusal plane extending to and indicating a position transitioned to the buccal side or the labial side from the virtual dentition in the virtual occlusal plane.

Further objects or other features of the invention will be manifested by preferred embodiments described below with reference to the accompanying drawings.

According to the present invention, the occlusal plane is formed in the oral cavity of a patient in which the teeth in the dentition are partially missing and the remaining teeth of the dentition are protruding from the occlusal plane or lower than the occlusal plane. An occlusal plane reproduction device and an occlusal plane reproduction method that directly reproduces can be used.

Explanatory drawing of Campel plane Pc and virtual occlusal plane Pb Schematic diagram showing a state in which the patient wears the occlusal plane reproducing device 1 according to the first embodiment. Schematic diagram of the occlusal plane reproduction device 1 according to the first embodiment Schematic diagram showing an example of the occlusal plane indicating unit 30

[Embodiment 1]
Hereinafter, the occlusal plane reproducing device according to the first embodiment will be described in order with reference to the drawings. First, the Campel plane Pc and the virtual occlusal plane Pb will be described. FIG. 1 is an explanatory view of a Campel plane Pc and a virtual occlusal plane Pb. FIG. 1 is a view of the patient's head viewed from the right side, and is a view showing a part of the oral cavity for explanation.

The Campel plane Pc is a plane containing three points, the upper edge of the left and right tragus 4 of the patient and the lower edge of the ala of nose 5. The Campel plane Pc may include either one of the lower edges of the left and right nasal wings 5, but usually includes both. In FIG. 1, the campel plane Pc is shown by a two-dot chain line. In the present embodiment, the virtual occlusal plane Pb is a plane that is substantially parallel to the campel plane Pc and passes through the maxillary central incisor incisor. In FIG. 1, the virtual occlusal plane Pb is shown by a alternate long and short dash line.

In FIG. 1, the patient's tooth shows a state in which a part of the tooth in the dentition is missing and the missing portion 3 is formed. The ejected residual tooth 2e, which is the residual tooth 2 facing the defective portion 3, is ejected from the virtual occlusal plane Pb. In such a patient, it has been difficult to reproduce the ideal occlusal plane in the oral cavity by the prior art. For such patients, the occlusal plane can be reconstructed by removing a part of the remaining tooth 2 that has been squeezed out or by covering it with a crown restoration having a preferable morphology. can. In that case, it is necessary to reproduce the virtual occlusal plane Pb in the oral cavity in order to show the portion to be deleted or corrected in the oral cavity in the remaining tooth 2 that has been extracted.

FIG. 2 is a schematic view showing a state in which the patient wears the occlusal plane reproducing device 1 according to the first embodiment. FIG. 2 is a view of the patient's head viewed from the right side, as in FIG. 1, and is a view showing a part of the oral cavity for explanation. In FIG. 2, the tragus upper edge contact portion 11a and the ala of nose lower edge contact portion 13 of the campel plane measurement unit 10 of the occlusal plane reproduction device 1 abut on the upper edge of the tragus 4 and the lower edge of the ala of nose 5, respectively. It shows the state of being. The virtual occlusal plane indicating unit 31 of the occlusal plane indicating unit 30 of the occlusal plane reproducing device 1 is inserted into the oral cavity of the patient and indicates a state in which the virtual occlusal plane Pb is instructed. The dentition anterior end indicating portion 35 of the occlusal plane indicating unit 30 is in contact with the incisor edge of the maxillary central incisor of the patient.

By mounting the occlusal plane reproducing device 1 in this way, the virtual occlusal plane Pb parallel to the Campel plane Pc can be reproduced in the oral cavity by the virtual occlusal plane indicating unit 31. At this time, the virtual occlusal plane indicating portion 31 is not in contact with the remaining teeth 2 of the patient. That is, the virtual occlusal plane indicating unit 31 runs at a position transitioned to the buccal side or the labial side from the virtual dentition estimated from the remaining teeth 2 and the like of the patient. In other words, the virtual occlusal plane indicating unit 31 travels in the oral cavity at a position separated from the virtual dentition by a predetermined distance on the buccal side or the labial side. The distance away from the virtual dentition may be constant or may differ for each part in the virtual dentition. As a result, the virtual occlusal plane Pb can be reproduced in the oral cavity regardless of the position of the remaining tooth 2, the protruding or low position, the shape, and the like.

<Occlusion plane reproduction device 1>
Next, a specific configuration of the occlusal plane reproducing device 1 according to the first embodiment will be described. FIG. 3 is a schematic view of the occlusal plane reproducing device 1 according to the first embodiment. FIG. 3A is a side view of the occlusal plane reproducing device 1, and FIG. 3B is a plan view of the occlusal plane reproducing device 1. In FIG. 3, the movable direction of each component is indicated by an arrow.

The occlusal plane reproducing device 1 includes a campel plane measuring unit 10, an occlusal plane indicating unit 30, and a support column 20. The campel plane measuring unit 10 and the occlusal plane indicating unit 30 are connected by a support column 20.

The campel plane measuring unit 10 has a pair of tragus upper edge contact portions 11a and 11b, a nose wing lower edge contact portion 13, and an arm portion 15. The pair of tragus upper edge contact portions 11a and 11b and the ala of nose lower edge contact portion 13 are connected to the arm portion 15, respectively. The arm portion 15 has a strut connecting portion 19 formed so as to be connectable to the campel plane measurement unit connecting portion 21 of the strut 20.

The arm portion 15 can be arranged on the left and right sides of the patient's face by the right arm portion 15a and the left arm portion 15b. That is, the distance between the right arm portion 15a and the left arm portion 15b can be adjusted to be longer than the distance between the left and right ears of the patient's face. In FIG. 3, the arm portion 15 is shown as a U-shaped rod-shaped member, but the shape of the arm portion 15 is not limited to this, and may be any shape such as a U-shape or an arc shape. can. The shape of the arm portion 15 is not particularly limited as long as the patient's face is configured to fit the patient's face in the space partitioned by the right arm portion 15a and the left arm portion 15b.

The arm portion 15 holds the pair of tragus upper edge contact portions 11a and 11b and the ala of nose lower edge contact portion 13 on the campel plane Pc. The tragus upper edge contact portions 11a and 11b and the ala of nose lower edge contact portion 13 can move relative to the arm portion 15, as described later, but the moving direction thereof is on the campel plane Pc. Limited to. As a result, the pair of tragus upper edge contact portions 11a and 11b and the ala of nose lower edge contact portion 13 are brought into contact with the left and right tragus and the lower edge of the ala of nose, respectively, thereby causing the arm portion 15 (campel plane measurement unit 10). ) Can be arranged substantially parallel to the tragus plane.

The tragus upper edge contact portions 11a and 11b have a structure capable of contacting the upper edges of the left and right tragus of the patient. The tips of the tragus upper edge contact portions 11a and 11b may be provided with tip portions 12a and 12b that come into direct contact with the patient, respectively. The tip portions 12a and 12b may be made of, for example, resin, rubber, or the like, and may be a member whose corners are chamfered.

The tragus upper edge contact portion 11a is connected to the right arm portion 15a, and the tragus upper edge contact portion 11b is connected to the left arm portion 15b. The tragus upper edge contact portions 11a and 11b may be rotatably connected to the left and right arm portions 15a and 15b, respectively. The tragus upper edge contact portions 11a and 11b may be slidably connected to the left and right arm portions 15a and 15b in a direction toward or away from the patient's ear (tragus), respectively. Further, the tip portions 12a and 12b may be rotatably connected to the tragus upper edge contact portions 11a and 11b, respectively. Further, the tip portions 12a, 12b and / or the tragus upper edge contact portions 11a, 11b are on the plane formed by the arm portions 15a, 15b as long as the arm portions 15a, 15b are held on the campel plane Pc. It does not have to be located. For example, the tips 12a and 12b may be configured to be inserted into the left and right ear canals of the patient, and as a result, the arm portions 15a and 15b may be arranged on the campel plane Pc. By configuring the upper edge contact portions 11a and 11b and the tips 12a and 12b in this way, the occlusal plane can be applied to various patients regardless of the size of the patient's head and the position of the ear (tragus). The reproduction device 1 can be attached.

The lower edge contact portion 13 of the ala of nose is connected to the arm portion 15 and has a configuration capable of contacting the lower edge of the patient's ala of nose. The lower edge contact portion 13 of the ala of nose may be connected to only one of the right arm portion 15a or the left arm portion 15b, and may not be connected to both.

The lower edge contact portion 13 of the ala of nose may be rotatably connected to the arm portion 15. The lower edge contact portion 13 of the ala of nose may be slidably connected to the arm portion 15 in a direction toward or away from the patient's nose (ala of nose) or in a direction parallel to the arm portion 15.

The occlusal plane indicating unit 30 has a virtual occlusal plane indicating unit 31. In FIG. 3, the virtual occlusal plane indicating portion 31 is connected to the support column 20 via the support portion 37 and is held on the virtual occlusal plane Pb extending in parallel with the campel plane Pc.

The virtual occlusal plane indicating unit 31 is configured to travel at a position transitioned to the buccal side or the labial side of the virtual dentition on the virtual occlusal plane Pb. The virtual occlusal plane indicating portion 31 is configured so as not to come into contact with the remaining teeth 2 of the patient.

The shape of the virtual occlusal plane indicating portion 31 is not particularly limited, but can be, for example, a U-shape extending in a rod shape along the virtual dentition as shown in FIGS. 3 and 4A. FIG. 4 is a schematic view showing an example of the occlusal plane indicating unit 30.

The shape of the virtual occlusal plane indicating portion may be, for example, two linearly extending rods as shown in the virtual occlusal plane indicating portion 32 as shown in FIG. 4 (b). In the case of the virtual occlusal plane indicator 32 as shown in FIG. 4B, the virtual occlusal plane indicator 32 is moved so that the distance (width) between the two virtual occlusal plane indicator 32 can be adjusted according to the size of the patient's mouth. It may be configured to be possible.

The material of the virtual occlusal plane indicating portions 31 and 32 is not particularly limited as long as the virtual occlusal plane can be indicated in the oral cavity of the patient. As the material of the virtual occlusal plane indicating portions 31 and 32, for example, those made of resin or rubber, which are relatively soft and have elasticity, which do not easily damage the oral cavity of the patient, are preferable. Further, as the material of the virtual occlusal plane indicating portions 31 and 32, since the virtual occlusal plane indicating portions 31 and 32 are inserted into the oral cavity of the patient, it is preferable that the material can be appropriately disinfected. It is preferable that each member constituting the occlusal plane reproducing device 1 does not have a sharp tip portion due to chamfering or the like. The occlusal plane reproducing device 1 is a material that can be disinfected by a simple cleaning because the patient may have an infectious disease in other parts other than the virtual occlusal plane indicating portions 31 and 32. Is preferable. Further, the occlusal plane reproducing device 1 can be made of a material that can be disinfected as a whole, and even if a material that can be completely sterilized by sterilization or the like, a material having an antibacterial function, or a coating having an antibacterial function is applied. good.

It is preferable that the occlusal plane indicating unit 30 further includes an dentition front end indicating portion 35. The dentition anterior end indicating portion 35 indicates the position of the maxillary central incisor incisor edge portion of the virtual dentition. If the patient's maxillary central incision remains and the position of the central incisor coincides with the position of the maxillary central incision in the virtual dentition, the dentition anterior end indicator 35 will be the patient's upper jaw. The virtual occlusal plane indicating portion 31 may be configured to indicate the occlusal plane in a state of being in contact with the cut edge portion of the central incisor. If the position of the maxillary central incisor does not match the position of the maxillary central incisor in the virtual dentition, the virtual occlusion is in contact with the position of the incisor of the assumed ideal maxillary central incisor. The plane indicating portion 31 may be configured to indicate the occlusal plane.

Although not shown, the occlusal plane indicating unit 30 is not a physical structure such as the virtual occlusal plane indicating unit 31, but, for example, a laser beam capable of irradiating in a direction parallel to the Campel plane Pc or a virtual occlusal plane Pb. It can also be realized by a hologram or the like that can be projected into the oral cavity.

The support column 20 movably connects the occlusal plane measuring unit 10 and the occlusal plane indicating unit 30 while maintaining the state in which the virtual occlusal plane indicating unit 31 is parallel to the occlusal plane Pc. That is, the campel plane measuring unit 10 and the occlusal plane indicating unit 30 can move while maintaining a state substantially parallel to the campel plane Pc and maintaining a state parallel to each other. The virtual occlusal plane indicating unit 31 of the occlusal plane indicating unit 30 can be arranged in parallel with the campel plane Pc, and is required to be parallel to the campel plane Pc when used.

As long as the function of the support column 20 as described above is realized, the connection form between the support column 20, the campel plane measurement unit 10, and the occlusal plane indication unit 30 is not particularly limited. For example, as shown in FIG. 3, the support column connection portion 19 of the campel plane measurement unit 10 is a rod-shaped protrusion, and the campel plane measurement unit connection portion 21 of the support column 20 is a hole into which the protrusion can be inserted. The camper plane measuring unit 10 may be fixed to the support column 20 by gripping it. Further, as shown in FIG. 3, the strut connecting portion 39 of the occlusal plane indicating unit 30 is a rod-shaped protrusion, and the occlusal plane indicating unit connecting portion 29 of the strut 20 is a hole into which the protrusion can be inserted. The occlusal plane indicating unit 30 may be fixed to the support column 20 by gripping the occlusal plane indicating unit 30.

Although the support column 20 is shown as one member in FIG. 3, for example, it may be composed of two or more separated members. In that case, the rod-shaped virtual occlusal plane indicating portion 32 may be held by the support portion 37 on each of the separated columns.

[Embodiment 2]
Hereinafter, the occlusal plane reproduction method according to the second embodiment will be described. The occlusal plane reproduction method according to the second embodiment can be realized by using the occlusal plane reproduction device 1 according to the first embodiment. In the following description, the description of the same configuration is omitted, and a common reference numeral is used.

The occlusal plane reproduction method includes a campel plane measuring step and an occlusal plane indicating step. In the campel plane measuring step, the patient's campel plane Pc is measured. At this time, the Campel plane Pc can be measured by using the Campel plane measuring unit 10 of the occlusal plane reproducing device 1. In the occlusal plane instruction step, the position is on the virtual occlusal plane Pb extending parallel to the Campel plane Pc in the patient's oral cavity, and the transition is to the buccal side or the labial side from the virtual dentition in the virtual occlusal plane Pb. Indicate the position you did. At this time, the virtual occlusal plane Pb can be instructed in the oral cavity by using the occlusal plane indicating unit 30 of the occlusal plane reproducing device 1.

The virtual occlusal plane reproduced by the above-mentioned occlusal plane reproducing device 1 and the occlusal plane reproducing method can also be used for dentition diagnosis in a patient in which the remaining teeth 2 are protruding from the virtual occlusal plane Pb or are in a low position. .. The occlusal plane reproduction method is not a diagnostic method itself, but a support method for improving the accuracy of diagnosis.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and changes can be made within the scope of the gist thereof. For example, the present invention shall include the following gist.

(Purpose 1) The occlusal plane reproducing device has a pair of upper ears abutting portions that abut the upper edges of the left and right ears of the patient and a lower rim abutment of the nasal wing that abuts the lower edge of the patient's nasal wing. An arm portion that holds the portion, the pair of ear bead upper edge contact portions, and the nose wing lower edge contact portion on a camper plane including the three points of the left and right ear bead upper edges and the nose wing lower edge. A camper plane measuring unit having a An occlusal plane indicating unit having a virtual occlusal plane indicating unit traveling at a position transitioned to the labial side, the campel plane measuring unit, and the occlusal plane indicating unit are provided by the virtual occlusal plane indicating unit with respect to the campel plane. The purpose is to provide a support column that can be moved and connected while maintaining a parallel state.

According to this, the tooth in the dentition is partially missing, and the remaining tooth of the dentition is directly exposed to the occlusal plane in the oral cavity of the patient who is protruding from the occlusal plane or lower than the occlusal plane. Can be reproduced in a realistic manner.

(Purpose 2) In the occlusal plane reproduction device, the occlusal plane indicating unit indicates the position on the virtual occlusal plane and the position of the maxillary central incisor incisor edge of the virtual dentition. It may have a portion further.

(Purpose 3) In the occlusal plane reproducing device, the pair of tragus upper edge contact portions and the ala of nose lower edge contact portions are connected to the arm portion so as to be able to translate on the campel plane. There may be.

(Purpose 4) The occlusal plane reproduction method includes a campel plane measuring step of measuring a campel plane including three points of the upper edge of the left and right ears of the patient and the lower edge of the nose wing of the patient, and a campel plane measuring step in the oral cavity of the patient. It has an occlusal plane instruction step that indicates a position on a virtual occlusal plane extending parallel to the campel plane and a position transitioned to the buccal side or the labial side from the virtual dentition in the virtual occlusal plane. It is a thing.

1: Occlusal plane reproduction device 2: Residual tooth 2e: Extruded residual tooth 3: Missing part 4: Ear bead 5: Nose wing 10: Campel plane measurement unit 11a, 11b: Ear bead upper edge contact part 12a, 12b: Tip part 13: Nose wing lower edge contact portion 15: Arm portion 19: Strut connection portion 20: Strut 21: Campel plane measurement unit connection portion 29: Occlusal plane indication unit connection portion 30: Occlusal plane indication unit 31, 32: Virtual occlusal plane indication Part 35: Dentition front end indicating part 37: Support part 39: Strut connection part Pb: Virtual occlusal plane Pc: Campel plane

Claims (4)

A pair of tragus upper edge contact portions that abut on the upper edges of the left and right tragus of the patient, a nose wing lower edge contact portion that abuts on the lower edge of the patient's ala of nose, and the pair of tragus upper edges. A camper plane measuring unit having an arm portion that holds the contact portion and the lower edge contact portion of the ala of nose on a campel plane including three points of the upper edge of the left and right tragus and the lower edge of the nose wing.
A virtual position in the oral cavity of the patient on a virtual occlusal plane extending parallel to the Campel plane and traveling at a position transitioned to the buccal side or the labial side from the virtual dentition in the virtual occlusal plane. An occlusal plane indicating unit having an occlusal plane indicating unit,
An occlusal plane reproducing device including a support column for connecting the occlusal plane measuring unit and the occlusal plane indicating unit so that the virtual occlusal plane indicating unit can move while maintaining a state parallel to the occlusal plane. The first aspect of claim 1, wherein the occlusal plane indicating unit is located on the virtual occlusal plane and further has a dentition anterior end indicating portion that indicates the position of the maxillary central incisor incisor edge portion of the virtual dentition. Occlusal plane reproduction device. The occlusion according to claim 1 or 2, wherein the pair of tragus upper edge contact portions and the ala of nose lower edge contact portions are connected to the arm portion so as to be able to translate on the campel plane. Plane reproduction device. A camper plane measuring step of measuring a campel plane including three points of the upper edge of the patient's left and right tragus and the lower edge of the patient's ala of nose, and a step of measuring the campel plane.
An occlusal position in the oral cavity of the patient on a virtual occlusal plane extending parallel to the Campel plane and indicating a position transitioned to the buccal or labial side of the virtual dentition in the virtual occlusal plane. Plane instruction process and
An occlusal plane reproduction method having.

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