JP2020081653A - Upper jaw impression tray, lower jaw impression tray, and impression tray set - Google Patents

Abstract

To provide an upper jaw impression tray, lower jaw impression tray, and impression tray set capable of accurately acquiring an impression of an alveolar ridge even when the alveolar ridge is relatively low and wide.SOLUTION: An upper jaw impression tray 10C comprises: a base part 14 having a convexly curved side facing a palate; and an upper jaw ridge wall part 12 that is provided along an outer edge of the base part 14 and has curved concavities 16 for covering an upper alveolar ridge. In a state in which the base part 14 is placed on a horizontal plane, an angle θ formed by an inclined line K and a lower width virtual line L1 is equal to or larger than 139° and equal to or smaller than 150° in at least portions of regions of the concavities 16 corresponding to molar teeth, where the lower width virtual line L1 is a line connecting lowest bottom surface parts M of left and right concavities 16 of the upper jaw ridge wall part 12 in a vertical surface orthogonal to the center axis in a longer direction of the base part 14 and the inclined line K is a linear line, of linear lines passing through bottom surface parts M and inner surfaces of outer wall apexes of the upper jaw ridge wall part 12, which forms the smallest angle θ on the obtuse angle side with the lower width virtual line L1.SELECTED DRAWING: Figure 9

Description

The present invention relates to an upper jaw impression tray, a lower jaw impression tray, and an impression tray set including these upper jaw impression tray and lower jaw impression tray.

Conventionally, in dental treatment, an impression tray (hereinafter simply referred to as "tray" is used to obtain an impression (model) of the oral mucosa when manufacturing a denture (denture) of a patient who has no upper or lower jaw teeth in the oral cavity. ).) is used. Usually, this tray has a concave portion, and an impression material such as alginate for taking an impression is piled up and held inside the concave portion. The tray is inserted into the oral cavity while holding the impression material, and is pushed toward the ridge and fitted. After a certain period of time has elapsed and the impression material has solidified to some extent, the tray is removed from the oral cavity.

As such an impression tray, for example, Patent Document 1 discloses a tray capable of partially removing only an end portion of the rear tray on the throat side when measuring the height between the ridges. .. Further, Patent Document 2 discloses a tray provided with a handle (grip) for assisting withdrawing/inserting the tray into/from the oral cavity. The handle has one end attached to the main body and the other end that extends outside the mouth from the lip and extends horizontally so that the other end is located outside the tray. The handle can be removed from the body.

Patent No. 5639159 International Publication No. 2015/022805

By the way, when the trays are fitted together to obtain an impression, it is important that the trays have less contact with tissues such as the gums around the alveolar ridge and the mucous membrane on the buccal side, and that the facial expression is as natural as possible. .. This is because if the tray strongly touches the gums, the patient feels uncomfortable and the tissue around the alveolar ridge is overly tense, making it difficult to obtain an accurate impression. However, the conventional impression tray has not been designed from the standpoint of the patient (size of the ridge, etc.).

In view of the above problems, the present invention provides an upper jaw impression tray, a lower jaw impression tray, and an impression tray set that can accurately take an impression of the jaw ridge even in the case of a relatively low and wide ridge. The purpose is to do.

Means for solving the above problems include the following aspects.
<1> An upper jaw impression tray including a base portion having a convexly curved side facing the palate and an upper ridge wall portion having a curved concave portion provided along the outer edge of the base portion and covering the upper ridge. Then, in a state where the base portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the base portion, a line connecting the lowest bottom surface portions M of the concave portions of the left and right maxillary ridge walls is formed into a virtual lower width. A line L1 and a straight line passing through the bottom surface M and the inner surface of the outer wall apex of the maxillary ridge wall where the angle θ on the obtuse angle side with the lower width virtual line L1 is the smallest is defined as the inclined line K. An upper jaw impression tray in which an angle θ formed by the inclined line K and the lower width imaginary line L1 is 139° or more and 150° or less in at least a part of a region of the recess corresponding to the molar teeth.

According to the configuration of the above <1>, the angle θ formed by the inclined line K and the lower width imaginary line L1 is 139° or more and 150° or less in at least a part of the region corresponding to the molar teeth of the recess. When this angle θ is less than 139°, when the upper impression tray is fitted to a relatively low and wide upper ridge, the possibility that the upper ridge wall portion strongly contacts the gums increases. On the other hand, when the angle θ exceeds 150°, the possibility that the upper ridge wall portion strongly contacts the buccal mucosa in the oral cavity increases.

That is, in this upper jaw impression tray, the angle θ at which the upper ridge wall portion stands up from the base portion is adjusted corresponding to a relatively low and wide upper ridge. In the region corresponding to the molars, there are large individual differences in the height and width of the maxillary ridge. Therefore, in at least a part of the region corresponding to the molar, contact of the upper impression tray with the tissue around the upper ridge is reliably suppressed.

<2> An upper jaw impression tray including a base portion having a convexly curved side facing the palate and an upper ridge wall portion having a curved recessed portion provided along an outer edge of the base portion and covering the upper ridge. Then, in a state where the base portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the base portion, a line connecting the lowest bottom surface portions M of the concave portions of the left and right maxillary ridge walls is formed into a lower width The line L1 is defined as a slant line K, and the straight line that passes through the bottom surface M and the inner surface of the outer wall apex of the maxillary ridge wall has the smallest angle θ on the obtuse angle side between the lower width virtual line L1 and the slant line K. When the contact point between K and the inner surface of the outer wall top is R and the line connecting the left and right contact points R is the upper width imaginary line L2, the upper width imaginary line L2 and the lower width imaginary line L2 are at least partly in the region corresponding to the molar teeth of the recess. The upper jaw impression tray in which the ratio X1/Y1 of the height difference Y1 from the width virtual line L1 and the length X1 of the upper width virtual line L2 is 5.4 or more and 12.5 or less.

According to the configuration of <2>, the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 in at least a part of the region of the recess corresponding to the molar teeth. And the ratio X1/Y1 is 5.4 or more and 12.5 or less. If this ratio is less than 5.4, the vertical height of the wall of the maxillary ridge will be too low, so the tray for impression of the maxilla can be sufficiently fitted to a relatively low and wide maxillary ridge while holding the impression material. Becomes difficult. On the other hand, if this ratio exceeds 12.5, the vertical height of the maxillary ridge wall becomes too high, so when fitted to a relatively low and wide maxillary ridge, the maxillary ridge wall is located above the oral cavity. Increases the chances of making strong contact with the mucous membrane of.

That is, in this upper jaw impression tray, the aspect ratio of the concave portion is adjusted to correspond to a relatively low and wide upper jaw ridge. Therefore, in at least a part of the region corresponding to the molar, contact of the upper impression tray with the tissue around the upper ridge is reliably suppressed.

<3> The upper jaw impression tray according to <1> or <2>, wherein an edge portion having a substantially circular cross section is formed on the outer wall top portion.

According to the configuration of <3>, since the edge portion having a substantially circular cross section is formed at the outer wall top portion, it is possible to soften the contact of the outer wall top portion with the side surface of the upper jaw.

<4> A lower jaw impression tray including a bottom having a concavely curved side facing a top surface of the lower jaw ridge, and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw. , With the bottom placed on a horizontal surface, a line connecting the lowest bottom surface portions O of the recesses on the left and right bottom portions in a vertical plane orthogonal to the central axis of the bottom portion in the longitudinal direction is defined as a lower width imaginary line H1. An area corresponding to a posterior tooth of a recess, where a straight line that has the smallest obtuse angle θ between the lower width imaginary line H1 and a straight line that passes through and the inner surface of the outer wall top of the mandibular ridge wall is an inclined line N. In at least a part of the above, the lower jaw impression tray in which an angle θ formed by the inclined line N and the lower width imaginary line H1 is 143° or more and 162° or less.

According to the configuration of the above <4>, the angle θ formed by the inclined line N and the lower width imaginary line H1 is 143° or more and 162° or less in at least a part of the region corresponding to the molar teeth of the recess. When the angle θ is less than 143°, when the mandibular impression tray is fitted to a relatively low and wide mandibular ridge, there is a high possibility that the mandibular ridge wall will contact the gums. On the other hand, when the angle θ exceeds 162°, when the lower jaw impression tray is fitted into a relatively low and wide lower jaw ridge, the possibility that the lower jaw ridge wall portion contacts the buccal mucosa in the oral cavity increases.

That is, in the lower jaw impression tray, the angle θ at which the lower jaw wall wall stands up from the bottom is adjusted corresponding to a relatively low and wide lower jaw ridge. In the region corresponding to the molar, there are large individual differences in the height and width of the mandibular ridge. Therefore, the contact of the lower impression tray with the tissue around the lower ridge is reliably suppressed in at least a part of the region corresponding to the molar teeth.

<5> A lower jaw impression tray provided with a bottom having a concavely curved side facing a top surface of the lower jaw ridge, and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw. , With the bottom placed on a horizontal surface, a line connecting the lowest bottom surface portions O of the recesses on the left and right bottom portions in a vertical plane orthogonal to the central axis of the bottom portion in the longitudinal direction is defined as a lower width imaginary line H1. Among the straight lines that pass through and the inner surface of the outer wall apex of the mandibular ridge wall, the straight line having the smallest obtuse angle θ between the lower width imaginary line H1 is the slant line N, and the slant line N and the inner surface of the outer wall crest are Is T and the line connecting the left and right contacts T is an upper width imaginary line H2, the height of the upper width imaginary line H2 and the lower width imaginary line H1 is higher or lower in at least a part of the region corresponding to the posterior teeth of the recess. The lower jaw impression tray in which the ratio X2/Y2 between the difference Y2 and the length X2 of the upper width imaginary line H2 is 8.6 or more and 21.0 or less.

According to the configuration of <5>, the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 in at least a part of the region corresponding to the molar teeth of the recess. And the ratio X2/Y2 is 8.6 or more and 21.0 or less. If this ratio is less than 8.6, the vertical height of the wall of the mandibular ridge will be too low, so the tray for impression of the lower jaw will be pressed sufficiently against the relatively low and wide ridge of the lower jaw while holding the impression material. Becomes difficult. On the other hand, if this ratio exceeds 21.0, the vertical height of the mandibular ridge wall will be too high, and when fitted to a relatively low and wide mandibular ridge, The chances of contacting the side mucosa are increased.

That is, in this mandibular impression tray, the aspect ratio of the recess is adjusted to correspond to a relatively low and wide mandibular ridge. Therefore, the contact of the lower impression tray with the tissue around the lower ridge is reliably suppressed in at least a part of the region corresponding to the molar teeth.

<6> The lower jaw impression tray according to <4> or <5>, in which an edge portion having a substantially circular cross section is formed on the outer wall top portion.

According to the configuration of <6> above, since the outer wall apex has the edge portion having a substantially circular cross section, the outer wall apex can be softly contacted with the side surface of the lower jaw.

<7> An impression tray set comprising a tray for upper jaw impression and a tray for lower jaw impression, wherein the tray for upper jaw impression is provided along the outer edge of the base portion with a convex curved side facing the palate. And a wall of the upper ridge having a curved recess covering the upper ridge, and with the base placed on a horizontal plane, the left and right upper ridges in a vertical plane orthogonal to the central axis of the base in the longitudinal direction. A line connecting the lowest bottom surface M of the recess of the wall is defined as a lower width imaginary line L1, and an obtuse angle between the lower width imaginary line L1 of the straight lines passing through the bottom surface M and the inner surface of the outer wall top of the upper ridge wall. When the straight line with the smallest angle θ on the side is the inclined line K, the contact point between the inclined line K and the inner surface of the outer wall top is R, and the line connecting the left and right contact points R is the upper width imaginary line L2, for the upper jaw impression At least one of the following Rules 1 and 2 is satisfied in at least a part of the region corresponding to the posterior teeth of the recess of the tray, and the tray for impression of the lower jaw is concavely curved on the side facing the top surface of the lower ridge. And a curved lower jaw ridge wall portion provided along the outer edge of the bottom portion and covering the side surface of the lower jaw, and with the bottom portion placed on a horizontal plane, a vertical plane orthogonal to the central axis in the longitudinal direction of the bottom portion. In the above, a line connecting the lowest bottom surface portions O of the recesses on the left and right bottom portions is defined as a lower width virtual line H1, and a lower width virtual line H1 of the straight lines passing through the bottom surface portion O and the inner surface of the outer wall top of the lower ridge wall portion When the straight line having the smallest angle θ on the obtuse side is the inclined line N, the contact point between the inclined line N and the inner surface of the outer wall top is T, and the line connecting the left and right contact points T is the upper width imaginary line H2, An impression tray set in which at least one of the following Rules 3 and 4 is satisfied in at least a part of the region corresponding to the posterior teeth of the concave portion of the lower jaw impression tray.

Rule 1: The angle θ between the inclined line K and the lower width imaginary line L1 is 139° or more and 150° or less Rule 2: The height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the upper The ratio X1/Y1 of the width virtual line L2 to the length X1 is 5.4 or more and 12.5 or less. Rule 3: The angle θ formed by the inclined line N and the lower width virtual line H1 is 143° or more, It is 162° or less Regulation 4: The ratio X2/Y2 of the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is 8.6 or more, 21. Is less than or equal to 0

According to the above configuration of <7>, the impression tray set includes the upper jaw impression tray and the lower jaw impression tray. The maxillary impression tray corresponds to a relatively low and wide maxillary ridge, and at least part of the region corresponding to the posterior teeth of the recess, the angle θ at which the maxillary ridge wall stands up from the base, and the vertical and horizontal directions of the recess. At least one of the ratios is adjusted. Therefore, the contact of the upper impression tray with the tissue around the upper ridge is reliably suppressed. Further, the lower jaw impression tray corresponds to a relatively low and wide lower jaw ridge, and at least a part of the region corresponding to the posterior teeth of the recess, the angle θ at which the lower jaw ridge wall portion stands from the bottom, and the recess At least one of the aspect ratios is adjusted. Therefore, the contact of the lower jaw impression tray with the tissue around the lower ridge is reliably suppressed.

<8> The upper jaw impression tray has an upper height measuring plate provided on the lower surface of the base portion, and the lower jaw impression tray is provided on the upper surface of the bottom portion so as to face the upper height measuring plate. The impression tray set according to <7>, which has a lower height measuring plate whose height between the upper height measuring plate and the lower jaw ridge is measured as an interjaw distance.

According to the configuration of <8>, the occlusal height of the patient can be easily obtained while the impression tray set is mounted.

<9> A lower jaw impression tray including a bottom portion having a concavely curved side facing a top surface of the lower jaw ridge, and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw. The height of the lower jaw ridge wall in the vertical direction is the lowest in the front end at the front side and gradually lowers from the highest region at the rear side toward the front end in a side view.

According to the configuration of <9>, the contact of the wall of the lower ridge with the mucous membrane in the oral cavity is further suppressed.

According to the tray for upper jaw impression, the tray for lower jaw impression, and the tray for impression according to the present invention, the impression of the jaw ridge can be accurately obtained even in the case of a relatively low and wide ridge.

It is a perspective view which illustrates typically the outline of a structure of the tray for upper jaw impressions, and the tray for lower jaw impressions. It is a median cross-sectional view schematically explaining the inside of the oral cavity of the human body. It is a top view which illustrates typically an upper jaw impression tray in the state which a recessed part appears on the front surface of a paper surface. It is a bottom view which illustrates typically a lower jaw impression tray in the state where a recess appears in the front of the paper. (A) is a sectional view taken along line 5A-5A in FIG. 3, (B) is a sectional view taken along line 5B-5B in FIG. 4, and (C) is a tray for impression of a lower jaw shown in (B), It is a cross-sectional view in which the top and bottom are inverted and arranged. It is a side view which illustrates typically the state which fitted the tray for upper jaw impressions and the tray for lower jaw impressions, respectively to the ridge. It is sectional drawing in the position of the BB line in FIG. 3 of the tray for upper jaw impressions which concerns on 1st Example. It is sectional drawing in the position of the BB line in FIG. 3 of the tray for upper jaw impressions which concerns on 2nd Example. It is sectional drawing in the position of the BB line in FIG. 3 of the tray for upper jaw impressions which concerns on 3rd Example. It is sectional drawing in the position of the BB line in FIG. 3 of the tray for upper jaw impressions which concerns on a 1st comparative example. (A) is sectional drawing explaining the case where the edge part is provided in the outer wall top part of the tray for upper jaw impressions, (B) is sectional drawing explaining the case where other shapes of an outer wall top part. It is sectional drawing in the position of the EE line in FIG. 4 of the tray for lower jaw impressions concerning 4th Example. It is sectional drawing in the position of the EE line in FIG. 4 of the tray for lower jaw impressions which concerns on 5th Example. It is sectional drawing in the position of the EE line in FIG. 4 of the tray for lower jaw impressions concerning 6th Example. It is sectional drawing in the position of the EE line in FIG. 4 of the tray for lower jaw impressions which concerns on a 2nd comparative example. (A) is sectional drawing explaining the case where the edge part is provided in the outer wall top part of the tray for lower jaw impressions, (B) is sectional drawing explaining the case where other shapes of an outer wall top part. It is sectional drawing seen from the same direction as the sectional view of FIG. 5 of the impression tray set which concerns on a modification. It is a top view of the tray for lower jaw impressions of the tray for impressions which concerns on a modification.

Embodiments of the present invention will be described below. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the plane dimension, the ratio of the thickness of each device or each member, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined in consideration of the following description. Further, there are included portions in which dimensional relationships and ratios are different between the drawings.

<Impression tray set>
First, the outline of the impression tray set (10, 20) according to the present embodiment will be described with reference to FIGS. 1 to 6. As shown in FIG. 1, the impression tray set (10, 20) includes an upper jaw impression tray 10 and a lower jaw impression tray 20.

As shown in FIG. 2, the maxillary impression tray 10 is fitted to the maxillary ridge 111 of the maxilla 110 in the oral cavity and is used to obtain an impression of the maxillary mucosa. The maxillary mucosa includes the mucosa of the maxillary ridge 111 and the mucous membrane of the palate 102. Further, the lower jaw impression tray 20 is fitted to the lower jaw ridge 121 of the lower jaw 120 and used to obtain an impression of the lower jaw mucosa of the lower jaw ridge 121.

As shown in FIGS. 1 and 3, the upper impression tray 10 includes a base portion 14 and an upper ridge wall portion 12. The base portion 14 and the maxillary ridge wall portion 12 can be integrally formed of, for example, resin such as thermoplastic. The upper jaw impression tray 10 is symmetrical with respect to the central axis C1 in FIG. The central axis C1 is a horizontal line parallel to the median plane of the human body (see FIG. 5A), and is set so as to extend along the longitudinal direction of the base portion 14 (vertical direction in FIG. 3).

As shown in FIG. 1, the base portion 14 is curved in a convex shape on the side facing the palate 102 (see FIG. 2) by bulging the center. In addition, in the present invention, the center of the base portion 14 may be flat without being raised.

The upper ridge wall portion 12 is provided along the outer edge of the base portion 14 and has a substantially constant thickness. Note that the thickness of the upper ridge wall portion 12 in FIG. 3 is exaggeratedly drawn thick for the sake of explanation, and is different from the actual thickness. In FIG. 3, between the U-shaped outer edge of the base portion 14 and the outer edge of the maxillary ridge wall portion 12, the inner region corresponds to the inner wall of the maxillary ridge wall portion 12, and the outer region is the maxillary ridge. It corresponds to the outer wall of the wall 12. An inner wall and an outer wall of the maxillary ridge wall portion 12 form a curved concave portion 16 that covers the maxillary ridge 111. In addition, in FIG. 3, the recessed portion 16 appears on the front (front) side of the paper surface and has a U-shape in a plan view.

Inside the concave portion 16 in FIG. 3, regions corresponding to the respective seven teeth on the left and right of the maxillary ridge 111 are illustrated by dotted lines. Of these 7 pairs of teeth, the upper 3 front pairs in FIG. 3 are front teeth, and the lower 4 rear rear pairs in FIG. 3 are back teeth. The four pairs of back teeth are the first premolar 114, the second premolar 115, the first molar 116 and the second molar 117, and the height and width of the maxillary ridge 111 at this position have large individual differences. .. In the present embodiment, the regions of the recess 16 corresponding to the four pairs of back teeth are set as the “molar region D1”. Although not shown, the molar region D1 may be set to include the third molar (parent unknown) on the rear side of the second molar 117.

The width of the concave portion 16 is a distance measured along the horizontal direction H between the inner wall and the outer wall of the maxillary ridge wall portion 12, and as a whole, the maxillary ridge width is considered so that the patient's maxillary ridge fits. Is set. As the maxillary ridge width, for example, an average value set using factors such as the nationality, sex, age, and weight of the patient can be adopted in accordance with the target patient. Similarly, the depth of the recess 16 is also set in consideration of the height of the maxillary ridge so that the maxillary ridge can be accommodated as a whole. The upper jaw impression tray 10 according to the present embodiment is characterized by the configuration of the concave portion 16 in the molar region D1. The specific configuration will be described later.

As shown in FIGS. 1 and 4, the lower jaw impression tray 20 includes a bottom portion 24 and a lower ridge wall portion 22. The lower jaw impression tray 20 is symmetrical with respect to the central axis C2 in FIG. As shown in FIG. 5B, the central axis C2 is a horizontal line parallel to the median plane of the human body, and is set so as to extend along the longitudinal direction of the bottom portion 24 (vertical direction in FIG. 4).

The bottom portion 24 is V-shaped in a plan view, and the side facing the top surface (see FIG. 2) of the mandibular ridge 121 is curved in a concave shape. In addition, the lower ridge wall portion 22 is provided along the outer edge of the bottom portion 24, and is curved so as to cover the side surface of the lower ridge 121. As shown in FIG. 4, the concavely curved inner surface of the bottom portion 24 and the curved inner surface of the mandibular ridge wall portion 22 form a recess 26 that covers the lower ridge 121. In FIG. 4, the concave portion 26 appears on the front (front) side of the paper surface, and is provided except for the V-shaped root portion which is the uppermost portion in FIG. 4. This base portion corresponds to the tip of the lower jaw impression tray 20.

Inside the recessed portion 26 in FIG. 4, regions corresponding to the left and right teeth of the lower jaw ridge 121 are illustrated by dotted lines. Of these 8 pairs of teeth, the upper 4 front pairs in FIG. 8 are front teeth, and the lower 4 rear pairs in FIG. 8 are back teeth. The four pairs of back teeth are the first premolar 125, the second premolar 126, the first molar 127 and the second molar 128, and the height and width of the mandibular ridge 121 at this position have large individual differences. .. In the present embodiment, the regions of the recesses 26 corresponding to the four pairs of back teeth are set as the “molar region D2”. Although not shown, as in the case of the first embodiment, the molar region D2 may include the third molar (parent unknown) on the rear side of the second molar 128.

The width of the concave portion 26 is a distance measured along the horizontal direction H between the inner wall and the outer wall of the mandibular ridge wall portion 22, and as in the case of the maxillary impression tray 10, the lower jaw ridge of the patient is accommodated as a whole. As described above, it is set in consideration of the width of the mandibular ridge. Similarly, the depth of the recess 26 is also set in consideration of the height of the mandibular ridge so that the mandibular ridge is accommodated as a whole. The lower jaw impression tray 20 according to the present embodiment is characterized by the configuration of the recess 26 in the molar region D2. The specific configuration will be described later.

As shown in FIG. 5C, the tip of the lower jaw impression tray 20 is substantially flat, and the lower jaw ridge wall portion 22 that hangs downward from the tip is not provided in this region. Here, as indicated by a broken line encircled region A in FIG. 2, the front surface of the lower jaw 120 at the position of the front tooth and the inner surface of the lower lip are very close to each other. Since the mandibular ridge wall portion 22 is not provided at the tip, even if the mandibular impression tray 20 is fitted to the mandibular ridge 121 as shown in FIG. 6, the mandibular impression on the front surface of the lower jaw 120 and the inner surface of the lower lip. The contact of the tray 20 can be suppressed.

As shown in FIG. 6, when an impression is taken, an impression material 130 such as alginate is placed inside the recess 16 of the tray 10 for maxillary impression, and the tray 10 for maxillary impression is placed on the maxillary ridge 111 via the impression material 130. It is fitted. Similarly, the impression material 130 is also placed inside the concave portion 26 of the lower jaw impression tray 20, and the lower jaw impression tray 20 is fitted to the lower jaw ridge 121 via the impression material 130.

In addition, the upper ridge wall portion 12 of the upper impression tray 10 is provided with an avoiding portion 12A having a height lower than the surroundings at a position corresponding to the upper cheek ridge 112. The slope of the curve drawn by the ridgeline at the upper end of the maxillary ridge wall portion 12 in FIG. 6 is negative from the back side (right side in FIG. 6) to the front side (left side in FIG. 6) at the position of the avoidance portion 12A. Turn positive.

Similarly, the lower ridge wall portion 22 of the lower jaw impression tray 20 is provided with an avoiding portion 22A having a height lower than the surroundings at a position corresponding to the lower cheek ridge 122. The inclination of the curve drawn by the ridgeline at the lower end of the lower ridge wall portion 22 in FIG. 6 changes from positive to negative at the position of the avoidance portion 22A from the back side to the front side.

Here, the upper cheek ridge 112 and the lower cheek ridge 122 are thin fold-like mucous membranes extending in the vertical direction. The upper cheek zonule 112 is spanned like a curtain between the mucous membrane on the inside of the cheek and the upper jaw 110, and is attached to the vicinity of the upper part of the upper ridge 111 at the premolar position of the upper jaw 110. Further, the lower cheek zonule 122 is laid like a curtain between the lower jaw 120 and the lower jaw 120, and is attached to the vicinity of the upper part of the lower ridge 121 at the position of the premolar of the lower jaw 120.

Further, as bone resorption progresses, the upper jaw 110 becomes lower, so that the position of the root of the cheek ridge 112 to the upper ridge 111 becomes relatively high, and is close to the top surface of the upper ridge 111. Therefore, the upper impression tray 10 fitted in the upper ridge 111 easily contacts the cheek small band 112.

However, in the present embodiment, the avoidance portion 12A is provided, so that contact of the upper jaw impression tray 10 with the cheek zonule 112 is effectively suppressed. Similarly, when the lower jaw 120 is lowered, the lower jaw impression tray 20 fitted to the lower jaw ridge 121 is likely to come into contact with the cheek ridge 122. In the present embodiment, since the avoidance portion 22A is provided, the contact of the lower jaw impression tray 20 with the cheek small band 122 is also effectively suppressed.

Further, the vertical height of the mandibular ridge wall portion 22 is the lowest from the front end (left side in FIG. 6) and the highest from the rear side (right side in FIG. 6) from the front side 22B in a side view. It is configured to gradually lower toward the tip. Therefore, when the lower jaw impression tray 20 is fitted to the relatively lower lower ridge 121, the lower ridge wall portion 22 is further suppressed from coming into contact with the mucous membrane in the oral cavity.

<Upper jaw impression tray>
Next, the configuration of the concave portion 16 in the molar region D1 of the upper jaw impression tray 10 of the present embodiment will be specifically described with reference to FIGS. 7 to 10. First, as shown in FIG. 5A, a vertical plane (cross section) orthogonal to the central axis C1 in the longitudinal direction of the base portion 14 is set with the base portion 14 placed on the horizontal plane G. A plurality of vertical planes can be set along the central axis C1. Each of the vertical planes illustrated in FIGS. 7 to 9 is a portion (BB) of the outer wall of the maxillary ridge wall portion 12 in FIG. 3 corresponding to the maximum ridge portion having the widest horizontal length. It is a cross section of a line portion).

When the base portion 14 is placed on the horizontal plane G and a vertical plane is set, a protruding structure unrelated to the portion forming the concave portion 16 is present on the outer surface of the upper jaw impression tray 10 on the horizontal plane G side. , Treated as having no protruding structure. The projecting structure means, for example, a convex-shaped region protruding outward such as a handle for taking in and out, a protrusion used for determining an occlusal position and a height, which is disclosed in WO 2015/022805. To do. Such a protruding structure is essentially independent of the configuration of the recess 16 in the molar region D1. Therefore, when the upper jaw impression tray 10 including the protruding structure is placed on the horizontal plane G, the position of the vertical plane to be originally set may be unnecessarily inclined, and the vertical plane may not be properly set.

Next, as shown in FIGS. 7 to 9, a line connecting the lowest bottom surface portions M of the concave portions 16 of the left and right maxillary ridge wall portions 12 in the vertical plane is defined as a lower width virtual line L1. In addition, in each of the left and right recesses 16, among the straight lines passing through the bottom surface portion M and the inner surface of the outer wall top portion of the maxillary ridge wall portion 12, the straight line having the smallest obtuse angle θ between the lower width imaginary line L1 is inclined. Define as line K. Further, a contact point between the inclined line K and the inner surface of the outer wall top is defined as R, and a line connecting the left and right contact points R is defined as an upper width virtual line L2. In the case of the outer wall top portion in the vertical plane illustrated in FIGS. 7 to 9, the position of the upper end of the inner surface forming the contact point R is the highest. The angle θ between the inclined line K passing through the contact point R and the lower width virtual line L1 is the most compared with the angle formed by another inclined line passing through the inner surface below the contact point R between the lower width virtual line L1. small.

The bottom surface portion M is located on the outermost side in the horizontal direction on the inner surface of the recess 16. The upper width imaginary line L2 and the lower width imaginary line L1 are parallel to each other and are included on the same plane (vertical plane) that is viewed in a front view along the direction of the central axis C1. In addition, "the front view from the direction of the central axis C1" is a state in which the extending direction of the central axis C1 and the direction of the line of sight are parallel. Then, in the upper jaw impression tray 10 of the present embodiment, at least a part of the region (molar region D1) corresponding to the molar teeth of the concave portion 16 satisfies at least one of the following rules 1 and 2.

Rule 1: An angle θ formed by the inclined line K and the lower virtual line L1 is 139° or more and 150° or less (139°≦θ≦150°).
Rule 2: The ratio X1/Y1 between the height difference Y1 between the upper width virtual line L2 and the lower width virtual line L1 and the length X1 of the upper width virtual line L2 is 5.4 or more and 12.5 or less ( 5.4≦X1/Y1≦12.5).

Here, when the angle θ is less than 139°, there is a high possibility that the maxillary ridge wall portion 12 strongly contacts the gums when the maxillary impression tray 10 is fitted to the relatively low and wide maxillary ridge 111. On the other hand, if the angle θ exceeds 150°, the possibility that the maxillary ridge wall portion 12 strongly contacts the buccal mucosa in the oral cavity increases. The angle θ is preferably 140° or more and 149° or less, more preferably 140° or more and 147° or less, and particularly preferably 140° or more and 146° or less.

If the ratio X1/Y1 is less than 5.4, the vertical height of the maxillary ridge wall portion 12 becomes too low. Therefore, the maxillary impression tray 10 with the impression material 130 held is relatively low and wide. It becomes difficult to fit the upper jaw ridge 111 sufficiently. On the other hand, when the ratio X1/Y1 exceeds 12.5, since the vertical height of the maxillary ridge wall portion 12 becomes too high, the maxillary ridge wall portion 12 will not fit when fitted to a relatively low and wide maxillary ridge 111. , The possibility of strong contact with the upper mucosa in the oral cavity is increased. The ratio X1/Y1 is preferably 7.0 or more and 12.0 or less, more preferably 7.2 or more and 11.8 or less, and particularly preferably 7.4 or more and 11.5 or less.

In the molar region D1 of the concave portion 16, the angle θ in a region other than the region where the regulation 1 is satisfied can be set to, for example, 130° or more and 150° or less. Next, the upper jaw impression trays 10A, 10B, and 10C according to the first to third examples of the present embodiment will be described.

(First embodiment)
The maxillary impression tray 10A according to the first embodiment satisfies Rule 1 in at least a part of the molar region D1, but does not satisfy Rule 2. As shown in FIG. 7, in the upper jaw impression tray 10A, the angle θ formed by the inclined line K and the lower width imaginary line L1 is about 145°, and “139°≦θ≦150°” in Regulation 1 is be satisfied. On the other hand, the ratio X1/Y1 between the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 is about 5.0, which is defined in "5. 4≦X1/Y1≦12.5” is not satisfied.

The maxillary impression tray 10A according to the first embodiment satisfies the regulation 1 so as to correspond to the relatively low and wide maxillary ridge 111, and the maxillary ridge wall portion 12 is the base in at least a part of the molar region D1. The angle θ rising from the portion 14 is adjusted. Therefore, even if only the regulation 1 is satisfied, the contact of the upper jaw impression tray 10A with the tissue around the upper ridge 111 is reliably suppressed.

(Second embodiment)
The maxillary impression tray 10B according to the second example does not satisfy regulation 1 but satisfies regulation 2 in at least a part of the molar region D1. As shown in FIG. 8, in the upper jaw impression tray 10B, the angle θ formed by the inclined line K and the lower width imaginary line L1 is about 124°, and “139°≦θ≦150°” in Regulation 1 is Not satisfied. On the other hand, the ratio X1/Y1 between the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 is about 9.3. 4≦X1/Y1≦12.5” is satisfied.

In the maxillary impression tray 10B according to the second embodiment, the aspect ratio of the concave portion 16 is adjusted in at least a part of the molar region D1 corresponding to the relatively low and wide maxillary ridge 111 by satisfying the regulation 2. Has been done. Therefore, the contact of the upper jaw impression tray 10B with the tissue around the upper ridge 111 is surely suppressed even if the regulation 2 is satisfied.

(Third embodiment)
The maxillary impression tray 10C according to the third embodiment simultaneously satisfies the requirements 1 and 2 in at least a part of the molar region D1. As shown in FIG. 9, the upper jaw impression tray 10C has an angle θ between the inclined line K and the lower width imaginary line L1 of about 145°, and “139°≦θ≦150°” in Regulation 1 is be satisfied. Further, the ratio X1/Y1 between the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 is about 9.3, which is defined in "5. 4≦X1/Y1≦12.5” is satisfied.

The maxillary impression tray 10C according to the third embodiment simultaneously satisfies the requirements 1 and 2 to correspond to the relatively low and wide maxillary ridge 111, in at least a part of the molar region D1. Both the angle θ at which the portion 12 stands up from the base portion 14 and the aspect ratio of the recess 16 are adjusted. Therefore, the contact of the upper jaw impression tray 10C with the tissue around the upper ridge 111 is reliably suppressed.

(First Comparative Example)
On the other hand, the upper jaw impression tray 10Z according to the first comparative example does not satisfy the requirements 1 and 2 over the entire molar region D1. As shown in FIG. 10, the upper jaw impression tray 10Z has an angle θ between the inclined line K and the lower width imaginary line L1 of about 124°, and “139°≦θ≦150°” of the standard 1 is Not satisfied. Further, the ratio X1/Y1 between the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 is approximately 5.0, and the ratio of “5. 4≦X1/Y1≦12.5” is not satisfied. Therefore, in the upper jaw impression tray 10Z, in the case of the relatively low and wide upper jaw ridge 111, the contact of the upper jaw impression tray 10Z with the tissue around the upper ridge 111 becomes strong, and the impression of the upper jaw mucosa is accurately obtained. There is a concern that I cannot capture it.

(Effect of upper jaw impression tray)
As described in the first to third examples, the upper jaw impression tray 10 of the present embodiment is filled with at least one of the regulation 1 and the regulation 2, so that at least a part of the molar region D1 is obtained. In, the contact of the upper jaw impression tray 10 with the tissue around the upper ridge 111 is reliably suppressed. Therefore, even in the case of the relatively low and wide maxillary ridge 111, the impression of the maxillary mucosa can be accurately obtained.

Note that, in the vertical plane of FIG. 11A, a case where an edge 13 having a substantially circular cross section is provided on the outer wall apex of the maxillary ridge wall 12 is illustrated. The thickness of the edge portion 13 is thicker than that of the maxillary ridge wall portion 12, and the central portion of the edge portion 13 is bent toward the upper jaw 110 side (left side in FIG. 11A). Since the edge portion 13 having a substantially circular cross section is formed on the outer wall top portion, it is possible to soften the contact of the outer wall top portion with the side surface of the upper jaw 110.

In the case of the outer wall top portion having the edge portion 13 as illustrated in FIG. 11(A), the point at which the inclined line K passing through the bottom surface portion M contacts the inner surface of the edge portion 13 is an index of the inclination of the upper ridge wall portion 12. Is set as a contact point R. Further, when the inclined line K is set at a position in contact with the inner surface of the edge portion 13, the angle θ becomes the smallest. Besides the inclined line K, an inclined line J1 passing through the lower side of the contact point R, an inclined line J2 passing through the base of the edge portion 13 and the like may be present as straight lines intersecting the bottom surface portion M and the edge portion 13. However, in the case of the slanted line J1 and the slanted line J2, the angle formed with the lower width virtual line L1 is larger than that in the case of the slanted line K.

In addition, in the vertical plane of FIG. 11B, a case is illustrated where the end portion of the outer wall top portion does not bend inward and projects rightward. In other words, the rate of change of the slope of the curve forming the contour of the inner surface of the outer wall top changes from positive (plus) to negative (minus) in the vicinity of the maxillary ridge 111. In the case of the outer wall apex whose end portion projects laterally, as illustrated in FIG. 11(B), the point at which the inclined line K passing through the bottom surface M contacts the inner surface of the outer wall apex is the inclination of the upper ridge wall portion 12. It is set as a contact point R which is an index.

Further, when the inclined line K is set at a position in contact with the inner surface of the outer wall top in FIG. 11B, the angle θ becomes the smallest. In addition to the inclined line K, as the straight line intersecting the bottom surface portion M and the outer wall top portion, an inclined line J1 passing below the contact point R, an inclined line J2 passing through the end portion (corner portion) of the inner surface of the outer wall top portion, and the like. Can exist However, in the case of the slanted line J1 and the slanted line J2, the angle formed with the lower width virtual line L1 is larger than that in the case of the slanted line K.

<Lower jaw impression tray>
Next, the configuration of the concave portion 26 in the molar region D2 of the lower jaw impression tray 20 of the present embodiment will be specifically described with reference to FIGS. 12 to 16. First, as shown in FIG. 5B, with the bottom portion 24 placed on the horizontal plane G, a vertical plane (cross section) orthogonal to the central axis C2 of the bottom portion 24 in the longitudinal direction is set. A plurality of vertical planes can be set along the central axis C1. Each of the vertical planes illustrated in FIGS. 12 to 14 is a portion (EE) of the outer wall of the mandibular ridge wall portion 22 in FIG. 4 corresponding to the maximum ridge portion having the widest horizontal length. It is a cross section of a line portion). As in the case of the upper jaw impression tray 10, when the bottom 24 is placed on the horizontal plane G and the vertical plane is set, what is the portion forming the recess 26 on the outer surface of the lower jaw impression tray 20 on the horizontal plane G side? If there is an irrelevant projecting structure, it is treated as no projecting structure.

Next, as shown in FIGS. 12 to 14, a line connecting the lowest bottom surface portions O of the recesses of the left and right bottom portions 24 in the vertical plane is defined as a lower width imaginary line H1. In addition, in each of the left and right recesses 26, of the straight lines passing through the bottom surface O and the inner surface of the outer wall top of the lower ridge wall portion 22, the straight line having the smallest obtuse angle θ between the lower width imaginary line H1 is inclined. Define as line N. Further, a contact point between the inclined line N and the inner surface of the outer wall top is defined as T, and a line connecting the left and right contact points T is defined as an upper width virtual line H2. In the case of the outer wall top in the vertical plane illustrated in FIGS. 12 to 14, the upper end of the inner surface forming the contact T is the highest. The angle θ between the inclined line N passing through the contact point T and the lower width imaginary line H1 is the largest as compared with the angle formed by another inclined line passing through the inner surface below the contact point T between the lower width imaginary line H1. small.

The bottom surface portion O is located on the inner surface of the recess 26 in the outermost position in the horizontal direction. The upper width imaginary line H2 and the lower width imaginary line H1 are parallel to each other and are included on the same plane (vertical plane) that is viewed in a front view along the direction of the central axis C2. Then, in the lower jaw impression tray 20 of the present embodiment, at least a part of the region (molar region D2) of the recess 26 corresponding to the molar teeth satisfies at least one of the following rules 3 and 4.

Rule 3: An angle θ formed by the inclined line N and the virtual lower width line H1 is 143° or more and 162° or less (143°≦θ≦162°).
Rule 4: The ratio X2/Y2 of the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is 8.6 or more and 21.0 or less ( 8.6≦X2/Y2≦21.0).

Here, when the angle θ is less than 143°, when the mandibular impression tray 20 is fitted to the relatively low and wide mandibular ridge 121, the possibility that the lower ridge wall portion 22 contacts the gums increases. On the other hand, when the angle θ exceeds 162°, when the lower jaw impression tray 20 is fitted to the relatively low and wide lower jaw ridge 121, the lower jaw ridge wall portion 22 may contact the buccal mucosa in the oral cavity. Will increase. The angle θ is preferably 146° or more and 160° or less, more preferably 148° or more and 159° or less, and particularly preferably 150° or more and 158° or less.

Further, when the ratio X2/Y2 is less than 8.6, the vertical height of the mandibular ridge wall portion 22 becomes too low, so that the lower jaw impression tray 20 is relatively low and wide while holding the impression material 130. It becomes difficult to press the mandibular ridge 121 sufficiently. On the other hand, when the ratio X2/Y2 exceeds 21.0, the vertical height of the mandibular ridge wall portion 22 becomes too high, and therefore when fitted to a relatively low and wide mandibular ridge 121, the mandibular ridge wall portion 22 is , Increases the possibility of contacting the lower mucous membrane of the oral cavity. The ratio X2/Y2 is preferably 9.0 or more and 20.0 or less, more preferably 10.0 or more and 19.0 or less, and particularly preferably 11.0 or more and 18.0 or less.

In addition, in the molar region D2 of the concave portion 26, the angle θ in a region other than the region where the regulation 3 is satisfied can be set to, for example, 130° or more and 165° or less. Next, the lower jaw impression trays 20A, 20B, and 20C according to the fourth to sixth examples of the present embodiment will be described.

(Fourth embodiment)
The mandibular impression tray 20A according to the fourth embodiment satisfies Regulation 3 in at least a part of the molar region D2, but does not satisfy Regulation 4. As shown in FIG. 12, in the lower jaw impression tray 20A, the angle θ formed by the inclined line N and the lower width imaginary line H1 is about 155°, and “143°≦θ≦162°” in Regulation 3 is be satisfied. On the other hand, the ratio X2/Y2 between the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is about 8, and the regulation 4 “8.6≦”. “X2/Y2≦21.0” is not satisfied.

The lower jaw impression tray 20A according to the fourth embodiment satisfies the requirement 3 to correspond to the relatively low and wide lower jaw ridge 121, and the upper ridge wall portion 12 is the base in at least a part of the molar region D2. The angle θ rising from the portion 14 is adjusted. Therefore, the contact of the lower jaw impression tray 20A with the tissue around the lower jaw ridge 121 can be surely suppressed even if the regulation 3 is satisfied.

(Fifth embodiment)
The lower jaw impression tray 20B according to the fifth example does not satisfy regulation 3 but satisfies regulation 4 in at least a part of the molar region D2. As shown in FIG. 13, in the lower jaw impression tray 20B, the angle θ formed by the inclined line N and the lower width imaginary line H1 is about 140°, and “143°≦θ≦162°” in Regulation 3 is Not satisfied. On the other hand, the ratio X2/Y2 between the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is about 15, and the value of “8.6≦” in Regulation 4 is satisfied. X2/Y2≦21.0” is satisfied.

In the lower jaw impression tray 20B according to the fifth embodiment, the aspect ratio of the concave portion 26 is adjusted in at least a part of the molar region D2 in correspondence with the relatively low and wide lower jaw ridge 121 by satisfying regulation 4. Has been done. Therefore, the contact of the mandibular impression tray 20B with the tissue around the mandibular ridge 121 can be reliably suppressed even by satisfying regulation 4.

(Sixth embodiment)
The lower jaw impression tray 20C according to the sixth embodiment simultaneously satisfies the regulations 3 and 4 in at least a part of the molar region D2. As shown in FIG. 14, in the lower jaw impression tray 20C, the angle θ between the inclined line N and the lower width imaginary line H1 is about 155°, and “143°≦θ≦162°” in Regulation 3 is be satisfied. Further, the ratio X2/Y2 between the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is about 15, and the value of “8.6≦” in Regulation 4 is satisfied. X2/Y2≦21.0” is satisfied.

The lower jaw impression tray 20C according to the sixth embodiment simultaneously satisfies the requirements 3 and 4 to correspond to the relatively low and wide lower jaw ridge 121, and in at least a part of the molar region D2, the lower jaw wall. Both the angle θ at which the portion 22 stands up from the bottom portion 24 and the aspect ratio of the concave portion 26 are adjusted. Therefore, the contact of the lower jaw impression tray 20C with the tissue around the lower jaw ridge 121 is reliably suppressed.

(Second Comparative Example)
On the other hand, the lower jaw impression tray 20Z according to the second comparative example does not satisfy the requirements 3 and 4 over the entire molar region D2. As shown in FIG. 15, in the lower jaw impression tray 20Z, the angle θ formed by the inclined line N and the lower width imaginary line H1 is about 140°, and “143°≦θ≦162°” in Regulation 3 is Not satisfied. Further, the ratio X2/Y2 between the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2 is about 8, and the regulation 4 “8.6≦”. “X2/Y2≦21.0” is not satisfied. Therefore, in the lower jaw impression tray 20Z, in the case of the relatively low and wide lower jaw ridge 121, the contact of the lower jaw impression tray 20Z with the tissue around the lower jaw ridge 121 becomes strong, and the impression of the lower jaw mucosa is accurately obtained. There is a concern that I cannot capture it.

(Functional effect of lower jaw impression tray)
As described in the fourth example to the sixth example, the lower jaw impression tray 20 of the present embodiment is filled with at least one of the rules 3 and 4, so that at least a part of the molar region D2 is obtained. In, the contact of the lower jaw impression tray 20 with the tissue around the lower jaw ridge 121 is reliably suppressed. Therefore, even in the case of a relatively low and wide mandibular ridge 121, an impression of the mandibular mucosa can be accurately obtained.

Note that, in the vertical plane of FIG. 16A, a case where an edge portion 23 having a substantially circular cross section is provided on the outer wall top portion of the mandibular ridge wall portion 22 is illustrated. The thickness of the edge portion 23 is thicker than that of the mandibular ridge wall portion 22, and the central portion of the edge portion 23 is bent toward the lower jaw 120 side (left side in FIG. 16A). Since the edge portion 23 having a substantially circular cross section is formed on the outer wall top portion, it is possible to soften the contact of the outer wall top portion with the side surface of the lower jaw 120.

In the case of the outer wall top portion having the edge portion 23 as illustrated in FIG. 16(A), the point where the inclined line N passing through the bottom surface portion O contacts the inner surface of the edge portion 23 is an index of the inclination of the lower ridge wall portion 22. Is set as a contact point T. Further, when the inclined line N is set at a position in contact with the inner surface of the edge portion 23, the angle θ becomes the smallest. In addition to the inclined line N, as a straight line that intersects the bottom surface portion O and the edge portion 23, there may be an inclined line P1 that passes below the contact point T, an inclined line P2 that passes through the root of the edge portion 23, and the like. However, in the case of the inclined line P1 and the inclined line P2, the angle formed with the lower width virtual line H1 is larger than that in the case of the inclined line N.

Further, in the vertical plane of FIG. 16B, a case is illustrated where the end of the outer wall top portion does not bend inward and projects rightward. In other words, the rate of change of the slope of the curve forming the contour of the inner surface of the outer wall top changes from negative (minus) to positive (plus) in the vicinity of the mandibular ridge 121. In the case of the outer wall apex whose end portion projects laterally, as illustrated in FIG. 16(B), the point at which the inclined line N passing through the bottom surface O contacts the inner surface of the outer wall apex is the inclination of the mandibular ridge wall 22. It is set as a contact point T which is an index.

Further, when the inclined line N is set at a position in contact with the inner surface of the outer wall top in FIG. 16(B), the angle θ becomes the smallest. In addition to the inclined line N, as the straight line intersecting the bottom surface portion O and the outer wall top portion, an inclined line P1 passing below the contact point T, an inclined line P2 passing through the end (corner portion) of the inner surface of the outer wall top portion, and the like. Can exist However, in the case of the slanted line P1 and the slanted line P2, the angle formed with the lower width virtual line H1 is larger than that in the case of the slanted line N.

<Modification>
As shown in FIG. 17, the impression tray set (10, 20) has an upper height measuring plate 18 and a lower height measuring plate 18 for obtaining an occlusal height F between the maxillary ridge 111 and the mandibular ridge 121. The side height measuring plate 28 may be provided.

The upper height measurement plate 18 is provided on the lower surface of the base portion 14 of the upper jaw impression tray 10, and is integrally formed with the upper jaw impression tray 10 by resin such as thermoplastics. The upper height measuring plate 18 may be formed as a separate member from the upper jaw impression tray 10 and then attached to the upper jaw impression tray 10 with an adhesive or the like.

As shown in FIG. 18, plate-shaped or block-shaped storage parts 24A and 24B are provided on the upper surfaces of the left and right bottom parts 24 of the lower jaw impression tray 20, respectively. The lower height measuring plate 28 and the storage portions 24A and 24B can be made of resin such as thermoplastic. Further, the storage parts 24A and 24B can be integrally formed with the lower jaw impression tray 20.

As illustrated in the storage portion 24B in FIG. 17, the storage portions 24A and 24B are provided with a gap 24B1 inside which the lower height measuring plate 28 is stored. The right side portion (lower side in FIG. 18) of FIG. 17 of this gap 24B1 is open to the outside. The left and right ends of the lower height measurement plate 28 are simultaneously inserted into the openings of the gaps between the left and right storage portions 24A and 24B, so that the lower height measurement plate 28 is fitted into the left and right gaps.

As shown in FIG. 18, a through hole 28A having a female screw portion (not shown) on the inner peripheral surface is provided in the center of the lower height measuring plate 28. One end of a bar member (not shown) extending in the vertical direction in FIG. 17 is inserted into this through hole. A male screw portion is provided on the outer peripheral surface of one end of the rod.

When obtaining the occlusal height F, the lower height measuring plate 28 is fitted into the storage portions 24A and 24B, and the lower height measuring plate 28 is opposed to the upper height measuring plate 18. Then, while adjusting the positions of the maxillary ridge 111 and the mandibular ridge 121, while changing the length (height) of the rod inserted at one end by screw rotation, the other end of the rod is used as the upper height measuring plate 18. The length of the bar at a predetermined position may be obtained by abutting.

In this way, the height of the bar is adjusted between the sampler and the patient having the occlusal height F until the final appropriate occlusal height is obtained. After the adjustment, a bite material (not shown) is poured between the upper jaw impression tray 10 and the lower jaw impression tray 20 to fix the occlusion. After the bite material is solidified, the occlusal height F can be obtained by taking the upper jaw impression tray 10 and the lower jaw impression tray 20 out of the oral cavity.

As a method of measuring the occlusal height F, it is not essential to use the upper height measuring plate 18 and the lower height measuring plate 28. For example, a measurer can experience using an instrument such as a caliper between an arbitrary position on the base portion 14 of the upper jaw impression tray 10 and an arbitrary position on the bottom portion 24 of the lower jaw impression tray 20. You may measure based on this.

<Other embodiments>
Although the present invention has been described by the above disclosed embodiments, it should not be understood that the description and drawings forming a part of this disclosure limit the present invention. It should be considered that various alternative embodiments, examples, and operation techniques will be apparent to those skilled in the art from the present disclosure.

For example, although the upper jaw impression tray 10 and the lower jaw impression tray 20 that constitute the impression tray set (10, 20) are integrally described in the present embodiment, they may be used individually. As described in Examples 1 to 6, even when the upper jaw impression tray 10 and the lower jaw impression tray 20 are used independently, the impressions of the upper jaw mucosa or the lower jaw mucosa can be accurately obtained, respectively. it can.

Further, in the upper impression tray 10 according to the present embodiment, the range in which at least one of the rules 1 and 2 is satisfied is described as at least a part of the molar region D1, but in the present invention, the entire molar region D1 is described. May be extended. By filling at least one of Rule 1 and Rule 2 over the entire molar region D1, it is possible to more effectively suppress contact of the upper impression tray with the tissue around the upper ridge 111. Similarly, also in the lower jaw impression tray, the range where at least one of the regulations 3 and 4 is satisfied may extend over the entire molar region D2, and the contact of the lower jaw impression tray with the tissue around the lower jaw ridge 121. Can be suppressed more effectively.

As described above, the present invention includes various embodiments not described above, and the technical scope of the present invention is defined only by the matters specifying the invention in the scope of claims appropriate from the above description. Is.

10, 10A, 10B, 10C, 10Z Upper jaw impression tray 12 Upper jaw ridge wall portion 14 Base portion 16 Recess 18 Upper height measuring plate 20, 20A, 20B, 20C, 20Z Lower jaw impression tray 22 Lower jaw wall portion 24 Bottom portion 26 Recessed portion 28 Lower height measurement plate 102 Palate 110 Upper jaw 111 Upper jaw ridge 120 Lower jaw 121 Lower jaw ridge 130 Impression material θ Angle D1, D2 Molar region F Occlusal height G Horizontal plane H1 Lower width virtual line H2 Upper width virtual line K Inclination line L1 Lower width imaginary line L2 Upper width imaginary line M Bottom part N Inclined line O Bottom part R Contact point T Contact point X1, X2 Length Y1, Y2 Height difference

Claims (9)

A maxillary impression tray comprising: a base part having a convexly curved side facing a palate; and a maxillary ridge wall part provided with a curved concave part provided along an outer edge of the base part and covering the maxillary ridge, ,
In a state in which the base portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the base portion,
A line connecting the lowest bottom surface portions M of the recesses of the left and right upper ridge walls is defined as a lower width imaginary line L1, and the lower one of the straight lines passing through the bottom portion M and the inner surface of the outer wall top of the upper ridge wall portion. When the straight line having the smallest angle θ on the obtuse angle side with the virtual width line L1 is the inclined line K,
The upper jaw impression tray in which the angle θ formed by the inclined line K and the lower width imaginary line L1 is 139° or more and 150° or less in at least a part of the region of the recess corresponding to the molar teeth. A maxillary impression tray comprising: a base part having a convexly curved side facing a palate; and a maxillary ridge wall part provided with a curved concave part provided along an outer edge of the base part and covering the maxillary ridge, ,
In a state in which the base portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the base portion,
A line connecting the lowest bottom surface portions M of the recesses of the left and right upper ridge walls is defined as a lower width imaginary line L1, and the lower one of the straight lines passing through the bottom portion M and the inner surface of the outer wall top of the upper ridge wall portion. The straight line having the smallest angle θ on the obtuse side with the imaginary width line L1 is defined as an inclined line K,
R is a contact point between the inclined line K and the inner surface of the outer wall top,
When the line connecting the left and right contact points R is defined as the upper virtual line L2,
A ratio X1/Y1 of the height difference Y1 between the upper width imaginary line L2 and the lower width imaginary line L1 and the length X1 of the upper width imaginary line L2 in at least a part of the region of the recess corresponding to the molar teeth. Is an upper jaw impression tray having a size of 5.4 or more and 12.5 or less. An edge having a substantially circular cross section is formed on the top of the outer wall,
The upper jaw impression tray according to claim 1 or 2. A lower jaw impression tray comprising: a bottom curved on a side facing a top surface of a lower jaw ridge in a concave shape; and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw.
In a state in which the bottom portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the bottom portion,
A line connecting the lowest bottom surface portions O of the left and right concave portions is defined as a lower width imaginary line H1,
When the straight line passing through the bottom surface portion O and the inner surface of the outer wall apex of the lower ridge wall portion, the straight line having the smallest obtuse angle θ between the lower width imaginary line H1 is an inclined line N,
The lower jaw impression tray in which the angle θ formed by the inclined line N and the lower width imaginary line H1 is 143° or more and 162° or less in at least a part of the region of the recess corresponding to the molar teeth. A lower jaw impression tray comprising: a bottom curved on a side facing a top surface of a lower jaw ridge in a concave shape; and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw.
In a state in which the bottom portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the bottom portion,
A line connecting the lowest bottom surface portions O of the left and right concave portions is defined as a lower width imaginary line H1,
Among the straight lines passing through the bottom surface portion O and the inner surface of the outer wall top of the lower jaw ridge wall portion, the straight line having the smallest obtuse angle θ between the lower width imaginary line H1 is defined as an inclined line N,
The contact point between the inclined line N and the inner surface of the outer wall top is T, and
When the line connecting the left and right contact points T is defined as the upper width virtual line H2,
A ratio X2/Y2 of a height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and a length X2 of the upper width imaginary line H2 in at least a part of a region of the recess corresponding to the molar teeth. However, a lower jaw impression tray having a size of 8.6 or more and 21.0 or less. An edge having a substantially circular cross section is formed on the top of the outer wall,
The lower jaw impression tray according to claim 4 or 5. An impression tray set comprising an upper jaw impression tray and a lower jaw impression tray,
The upper jaw impression tray,
A side facing the palate is curved in a convex shape, and an upper ridge wall portion provided with a curved recess provided along the outer edge of the base portion and covering the upper ridge,
In a state in which the base portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the base portion,
A line connecting the lowest bottom surface portions M of the recesses of the left and right upper ridge walls is defined as a lower width imaginary line L1, and the lower one of the straight lines passing through the bottom portion M and the inner surface of the outer wall top of the upper ridge wall portion. The straight line having the smallest angle θ on the obtuse side with the imaginary width line L1 is defined as an inclined line K,
R is a contact point between the inclined line K and the inner surface of the outer wall top,
When the line connecting the left and right contact points R is defined as the upper virtual line L2,
In at least a part of the region corresponding to the posterior teeth of the concave portion of the upper jaw tray, at least one of the following prescriptions 1 and 2 is satisfied, and
The lower jaw impression tray,
A bottom portion whose side facing the top surface of the lower jaw ridge is concavely curved, and a curved lower jaw ridge wall portion which is provided along the outer edge of the bottom and covers the side surface of the lower jaw,
In a state in which the bottom portion is placed on a horizontal plane, in a vertical plane orthogonal to the central axis in the longitudinal direction of the bottom portion,
A line connecting the lowest bottom surface portions O of the left and right concave portions is defined as a lower width imaginary line H1,
Among the straight lines passing through the bottom surface portion O and the inner surface of the outer wall top of the lower jaw ridge wall portion, the straight line having the smallest obtuse angle θ between the lower width imaginary line H1 is defined as an inclined line N,
The contact point between the inclined line N and the inner surface of the outer wall top is T, and
When the line connecting the left and right contact points T is defined as the upper virtual line H2,
At least one of the following Rules 3 and 4 is satisfied in at least a part of the region corresponding to the molar teeth of the recess of the lower jaw impression tray,
Impression tray set.

Rule 1: The angle θ formed by the inclined line K and the lower width imaginary line L1 is 139° or more and 150° or less Rule 2: The height of the upper width imaginary line L2 and the lower width imaginary line L1 The ratio X1/Y1 between the difference Y1 and the length X1 of the upper width imaginary line L2 is 5.4 or more and 12.5 or less. Rule 3: The inclined line N and the lower width imaginary line H1 form The angle θ is 143° or more and 162° or less Rule 4: Ratio of the height difference Y2 between the upper width imaginary line H2 and the lower width imaginary line H1 and the length X2 of the upper width imaginary line H2. X2/Y2 is 8.6 or more and 21.0 or less
The upper jaw impression tray has an upper height measurement plate provided on the lower surface of the base portion,
The lower jaw impression tray is provided on the upper surface of the bottom portion so as to face the upper height measurement plate, and the height between the upper height measurement plate and the upper height measurement plate as the occlusal height between the upper ridge and the lower ridge. Has a lower height measurement plate on which is measured,
The tray set for impression according to claim 7. A lower jaw impression tray comprising: a bottom curved on a side facing a top surface of a lower jaw ridge in a concave shape; and a curved lower jaw ridge wall portion provided along an outer edge of the bottom and covering a side surface of the lower jaw.
The height of the lower ridge wall portion in the up-down direction is the lowest in the front end at the front side and gradually lowers from the highest region on the rear side toward the front end in a side view.