JPH055586Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a model for explaining the relationship between malocclusion of upper and lower dental arches and the temporomandibular joint.

Prior Art As a planar model for explaining the relationship between the joints between the temporal bone and the mandible, an maxillary member was fixed on a substrate, and a mandibular member was attached to it by two coil springs via a joint member. Although such models are known, such models cannot show anatomically accurate jaw movements, nor can they explain malocclusions in the upper and lower dental arches.

Purpose of the invention The present invention relates to the improvement of such a flat model, and provides a model that accurately shows the movement of the jaw and can easily explain the relationship between malocclusion of the upper and lower dental arches and the temporomandibular joint. The purpose is to

Structure of the invention The model of the invention has a base plate 1, and a zygomatic member 2, an upper jaw member 3, and a lower jaw member 4 arranged on the base plate 1 and each formed in a sheet shape, as shown in the drawings. , and the cheekbone member 2 is the substrate 1
The upper jaw member 3 has a tooth row 5a and is formed so that its top part can fit into the lower front recess 6 of the zygomatic member 2, and the lower jaw member 4 has a tooth row 5a.
It has a row of teeth 5b in the upper front, and the row of teeth 5b meshes with the row of teeth 5a of the upper jaw member 3 so that it can be opened and closed.
The rear part is attached to the zygomatic member 2 by three springs 8 with the joint member 7 in between. The three springs 8 are located at positions corresponding to the masticatory muscles, and the joint member 7 connects the mandibular member 4 to the zygomatic member 2.
The zygomatic member 2
and is slidably mounted in a downwardly projecting arcuate groove 10 provided in the coupling member 9 located on the rear surface of the mandibular member 4.

Furthermore, the lower jaw member 4 is provided with a notch 14 in the center, and a plurality of pieces 12 of different sizes are prepared and can be attached to this notch 14.
By replacing this, it has become possible to explain the size of the mandible and the resulting malocclusion of the dental arch.

That is, in the model of the present invention, the mandibular member 4 is connected to the zygomatic member by three springs 8 (coil springs in the example of the drawing) provided at positions corresponding to the masticatory muscles - the masseter muscle, the temporalis muscle, and the pterygoid muscle. 2, it is possible to understand the opening and closing of the jaw anatomically accurately.
Moreover, since the upper jaw member 3 having the row of teeth 5a can be replaced, and at the same time, the size of the lower jaw can be changed by changing the size of the piece 12 attached to the notch 14 of the lower jaw member 4. Maxillary member 3
Various examples of malocclusions of the upper and lower dental arches due to changes in the size of the mandibular member 4 can be illustrated, and the anatomical explanation becomes very easy.

In the present invention, since the front half 4a of the mandibular member 4 (front side of the notch 12) is formed to be detachable, the mandibular member 4 can be shaped (at the same time, the shape of the row of teeth 5b attached to the mandibular member 4). ) can also be changed, making it extremely versatile.

In such a model of the present invention, a window 11 is provided at an appropriate position in the front half 4a of the lower jaw member 4, and a section 12 is provided.
By making different marks 16 visible from the window 11 depending on the type of the window 11, the grade of malocclusion of the dental arch can be determined depending on the type of the mark 16 exposed from the window 11. Well, in this case, substrate 1
It is preferable to provide a display section 17 indicating the relationship between the mark 16 and the grade of malocclusion of the dental arch.

Furthermore, in the present invention, in order to stably hold the extra section 12 on the substrate 1, for example, a metal plate covered with a synthetic resin sheet is used as the substrate 1, and a magnetic rubber is coated on the back surface of the section 12. It is preferable to form the section 12 removably on the substrate 1 using a magnet, such as by providing a layer. In addition, the tooth row 5a of the upper jaw member 3 is arranged such that the first incisors 13 are arranged so that the first incisors 13 are It is preferable to attach it to the maxillary member 3 in a separated state in which the direction of the tip can be changed. In the example shown in the drawings, the top part of the upper jaw member 3 is formed to be slidable within a semicircular cavity 15 provided therein.

In addition, in the example of the drawing, the first incisors 13 are removably formed on the upper jaw member 3, the segment 12, and the tooth row 5a.
are all removably formed on the substrate 1 with magnets, and the grade of malocclusion of the dental arch is determined by the three colors blue, red, and yellow exposed through the window 11, depending on the size of the section 12.
Color markings 16 make it easy to understand.

Here, as shown on the display section 17, the blue mark 16a indicates the first grade, in which the mesiodistal relationship between the upper and lower dental arches is normal, and the red mark 16b indicates that the lower dental arch is the same as the upper dental arch. Indicates a second grade of occlusion that is more distal to the arch than normal. Class 2 includes (Category 1) Mandibular distal occlusion, which involves protrusion of the maxillary anterior teeth and is related to mouth breathing, and (Category 2) Mandibular distal occlusion.
This includes cases where the upper front teeth recede and normal breathing occurs. Further, the yellow mark 16c indicates the third grade in which the lower dental arch occlusions more mesially than normal with respect to the upper dental arch.

In addition, a mark A is provided on the zygomatic bone member 2 and the mandibular member 4, with the joint member 7 in between, which becomes a straight line in a normal positional relationship, and depending on the state of mark A, malocclusion of the dental arch and jaw The relationship between the joints may be understood. Furthermore, to make it easier to understand dentition-level malocclusion,
Also between the upper and lower tooth rows 5a and 5b, a mark B that is a straight line in a normal positional relationship is provided at the position of the 6th molar, and the first incisor 13 is formed on the upper jaw member 3 so that the direction of the tooth tip can be changed. In this case, the first incisor 13 and the upper jaw member 3
It is preferable to provide a mark C indicating a normal positional relationship between the two.

Effects of the invention The model of the invention can be easily produced in the form of a flat plate, and can easily explain the relationship between malocclusion of the upper and lower dental arches and the temporomandibular joint in an anatomically accurate state. For example, when surgically explaining to a patient the necessity of bone removal or addition depending on the size of the mandible, the patient can easily understand by simply replacing the section 12.
Furthermore, the explanation of malocclusion in the dental arches does not have to be limited to the upper and lower dental arches, but can also be explained by integrating and relating the functions of the temporomandibular joints.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing an example of the model of the present invention in its normal position; FIG. 2 is a plan view showing a modification of FIG. 1;
3 is a sectional view taken along the line AA in FIG. 1, FIG. 4 is a plan view of the example shown in FIG. 1 with detachable members removed, and FIG. 5 is a plan view of the articulating member. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Cheekbone member, 3... Upper jaw member, 4... Mandibular member, 5a, 5b... Teeth row, 6...
... recess, 7 ... joint member, 8 ... spring, 9 ... joint member, 10 ... groove, 11 ... window, 12 ... section, 13 ... first incisor, 14 ... notch, 15 …
... hollow, 16 ... mark, 17 ... display section.

Claims (1)

[Claims for Utility Model Registration] (1) A substrate 1, a zygomatic member 2, an maxillary member 3, and a mandibular member 4 disposed on the substrate 1 and each formed in a sheet shape, the zygomatic The member 2 is fixed to the base plate 1, and the upper jaw member 3
has a tooth row 5a, and the top thereof is the zygomatic member 2
The lower jaw member 4 has a row of teeth 5b at the upper front thereof, and the row of teeth 5b meshes with the row of teeth 5a of the upper jaw member 3 so that it can be opened and closed. As shown, the rear side is the joint member 7.
is attached to the zygomatic member 2 by three springs 8, and the three springs 8 are located at positions corresponding to the masticatory muscles,
The joint member 7 connects the mandibular member 4 to the zygomatic member 2 in an openable and closable manner.
and a connecting member 9 located on the rear surface of the mandibular member 4.
A notch 14 is provided in the center of the lower jaw member 4, and a notch 14 is provided in the center of the lower jaw member 4, and a member of a size that can be attached to the notch 14 is provided. Different sections 1
A malocclusion plane explanation board characterized in that a plurality of sections 12 are prepared and the size of the mandible can be explained by replacing the sections 12. (2) A window 11 is provided in front of the lower jaw portion 4, and different marks can be seen through the window 11 depending on the type of section 12. Board. (3) The explanatory board according to claim 1 or 2 of the utility model registration claim, in which the sections 12 are prepared in three types: large, medium, and small. (4) Scope of Utility Model Registration Claim 1, in which the first incisor 13 of the tooth row 5a of the upper jaw member 3 is slidably attached at its top within the semicircular cavity 15 provided in the upper jaw member 3. - Explanation board according to any one of Section 3. (5) Utility model registration claims Paragraphs 1 to 4, in which the section 12 is formed of a magnet and is detachably attached to the substrate 1.
Explanation board as described in any one of the sections. (6) The explanatory board according to claim 4, wherein the upper jaw member 3, the segment 12, and the first incisor 13 are formed with magnets to be detachably attached to the substrate 1.