JPH06258160A - Cassette for occlusal force diagnosis sheet - Google Patents

Abstract

PURPOSE:To make the reading work with a scanner efficient and to facilitate the preservation and control of a diagnosis sheet by using a cassette having a pair of transparent substrates for a pressure sensitive sheet holder and an occlusal force diagnosis sheet and a positioning means. CONSTITUTION:An occlusal force diagnosis sheet 26 having a holder 28 is held with transparent plates 60 and 62, which can be opened and closed. A handle member 64 is fixed to one end of the transparent plate 62. Projections 68 and 68, which are engaged with positioning small holes 36 and 36 of the holder 28, are provided in the protruding pattern on the transparent plate 62. The position of the holder 28 is determined on the transparent plate 62. Protruding stripes 60a and 60a are further provided at both right and left edges of the transparent plate 6. The interval between the transparent plates 60 and 62 is kept constant. so that the crush of the tooth shape recorded on the wax layer of the diagnosis sheet 26 is prevented. Under the state, wherein the holder 28 is located at the front side and the dental arch is located at the upper side, a cassette 58, which horizontally holds the sheet 25, is inserted into the inserting hole of a scanner. Thus, the reading work is made efficient. The cassette, which is holding the holder 28, is preserved in this state, and the storage is made easy.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cassette for accommodating an occlusal force diagnostic sheet in which both sides of a pressure sensitive sheet are covered with waterproof layers.

[0002]

2. Description of the Related Art In the field of dentistry, carbon paper has been widely used in the past for diagnosing the state of occlusion of teeth. This carbon paper is inserted between the upper and lower teeth of a patient, and the patient strongly bites in this state so that carbon is attached only to the portions where the upper and lower teeth are in contact. The dentist diagnoses the occlusal state of the patient from the position and area where the carbon is attached.

[0003]

However, this method using carbon paper only detects that the upper and lower teeth are in contact with each other, and cannot detect the tooth pressure, that is, the occlusal force. Therefore, it is necessary to predict the occlusal pressure from the adhered state of carbon, and it is difficult to correctly determine the treatment policy because the diagnosis of the occlusal situation such as strong bite or weak bite tends to be inaccurate. there were.

Further, in order to clearly attach carbon to the tooth-contacted portion, it is necessary to hit the upper and lower teeth with a plurality of ticks, or the jaws are moved to the left and right to rub the carbon-paper contact portion of the tooth with the tip of the tooth. It was necessary to do.

Further, since the position where the tooth is in contact with the entire dental arch is unclear, the dentist must look into the patient's mouth and work while confirming the position of the carbon paper. Therefore, there is a problem that workability is poor.

Therefore, the applicant proposed to use an occlusal force diagnostic sheet in which both sides of the pressure sensitive sheet are covered with waterproof layers (Japanese Patent Application No. 4-302975). It was also proposed that a wax layer be laminated on at least one surface of the pressure-sensitive sheet so that the dental mold is copied to the wax layer so that the occlusion state of the dental arch as well as the occlusal force can be simultaneously diagnosed (Japanese Patent Application No. 302976/1992).
issue). Further, it is proposed that the occlusal force diagnostic sheet is read by a scanner and image processing is performed by a computer to obtain a diagnostic result or various diagnostic data (Japanese Patent Application No. 4-
No. 302977, No. 4-302978, etc.).

However, when the patient bites, this occlusal force diagnostic sheet is largely curved along the tooth model or is largely deformed into an uneven shape. Therefore, when the sheet is read by the scanner, the reading portion of the sheet is out of the range of the depth of focus of the scanner, and it becomes impossible to read the image accurately.

Therefore, it is considered that the image is read in a state where the sheet is pressed by a glass plate serving as the image reading surface of the scanner to correct the curvature and deformation. However, in this case, setting the sheet on the scanner is troublesome and inefficient. Further, since the patient presses the bite sheet, the glass surface of the scanner is easily soiled, and it is necessary to wipe and clean the glass surface every time an image is read.

Further, when this sheet is set in the mouth of a patient, it is usually bent near the center so as to be folded downward on both sides of the sheet so that it can be easily inserted into the mouth. The patient's bite sheet is usually greatly curved or deformed. Therefore, this sheet is difficult to store, and there is a problem that it cannot be stored because the sheet is scratched during storage and the tooth profile recorded on the sheet is changed.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and a occlusal force diagnostic sheet in which both sides of a pressure sensitive sheet are covered with waterproof layers is read by a scanner and image processing is performed to obtain diagnostic results and diagnostic materials. A cassette of occlusal force diagnostic sheets that can easily set the occlusal force diagnostic sheet on the scanner for output, improve the efficiency of image reading work, and facilitate the storage and management of the patient's occluded sheet. The purpose is to provide a device.

[0011]

According to the present invention, an object of the present invention is to provide a cassette for accommodating an occlusal force diagnostic sheet with a holder in which a holder is fixed to the outer peripheral edge of a pressure sensitive sheet having both sides covered with a waterproof layer. An occlusal force diagnosis comprising: a pair of substrates sandwiching the holder and the occlusal force diagnostic sheet, at least one of which is transparent; and a positioning means which is provided on at least one of both substrates and positions the holder. Achieved by a cassette of sheets.

Here, the holder is provided with a knob portion for an operator to grasp with a finger, and a plurality of positioning small holes provided in the knob portion are engaged with positioning pins provided on the substrate to hold the holder. And the positioning means of the occlusal force diagnostic sheet can be configured. Further, when the occlusal force diagnostic sheet has a wax layer, it is desirable that a predetermined gap be held between the upper and lower substrates so that the substrate does not crush the irregularities of the tooth pattern recorded in the wax layer.

Further, in order to make it easier to put the sheet in the patient's mouth, it is desirable to previously provide the holder with folding lines such as perforations to facilitate folding. The position of the curved or deformed sheet is difficult to stabilize in the cassette,
It is desirable to provide a portion for holding the holder portion (holder holding portion) between both substrates.

[0014]

EXAMPLES First, the structure of the occlusal force diagnostic sheet to be housed in the cassette of the present invention will be described. 1 is a plan view of an occlusal force diagnostic sheet used in the present invention, FIG. 2 is a cross-sectional view showing its structure, FIG. 3 is a developed view of a holder attached to this sheet,
4 is an explanatory view of the assembling procedure, FIG. 5 is a view showing a mounted state of the holder, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

In FIG. 2, reference numeral 10 is a sheet-shaped synthetic resin support, and for example, a PET (polyethylene terephthalate) film having a thickness of 25 μm is used.
Reference numeral 12 denotes a developer coating layer, which is formed by applying a liquid obtained by dispersing an acid clay (montmorillonite) sulfuric acid treatment product in water containing caustic soda onto one surface (surface) of the support 10 and drying it. is there.

Reference numeral 14 denotes a color-developing agent coating layer formed on the color-developing agent coating layer 12, which is obtained by coating a color-developing agent such as 1-phenyl-1-xylylethane dissolved in oil into a microcapsule. is there. Here, the microcapsules are adjusted to various strengths, and the microcapsules to be destroyed change depending on the pressure. When the microcapsules are broken by the pressure, the color developer inside is absorbed by the color developer together with the oil to form a color. In this embodiment, the color is red. The density of this coloring increases almost linearly as the pressure increases.

Thus, the support 10 and the color developer coating layer 1
2 and the coloring agent coating layer 14 form a pressure sensitive sheet 15, and the pressure sensitive sheet 15 is cut out in a substantially horseshoe shape as shown by a broken line in FIG. This shape is determined so as to substantially follow the shape of a human dental arch, and the outer peripheral edge may be substantially horseshoe-shaped, and the inner concave cut may be omitted.

In FIG. 2, reference numeral 16 denotes a back waterproof layer, which is a support 10
The same PET film as, for example, a transparent film of 16 μm is used. Adhesive type glue is applied to one surface of the back waterproof layer 16 to form an adhesive layer 18. The back waterproof layer 16 is adhered to the back surface of the support 10 (the surface opposite to the developer coating layer 12) by an adhesive layer 18.

Reference numeral 20 denotes a front waterproof layer, which is formed of a transparent PET film having a thickness of 16 μm like the back waterproof layer 16. The front waterproof layer 20 is superposed on the color developer coating layer 14 and adhered to the adhesive layer 18 of the back waterproof layer 16 along the outer periphery of the support 10. In this case, it is desirable to sufficiently reduce the pressure between both the waterproof layers 16 and 20 to create a vacuum.

Thus, the support 10 and the color developer coating layer 1
2. The laminated body 15 of the coloring agent coating layer 14 is covered with the waterproof layers 16 and 20.
And the peripheral edge is adhered along the outside of the horseshoe-shaped laminate 15. Then, the outer shape is cut out on the outer periphery of the laminated body 15 leaving a gap in which the waterproof layers 16 and 20 adhere to each other. As a result, a substantially horseshoe-shaped pressure-sensitive sheet 22 is formed. The pressure sensitive sheet 22 is sealed by the back waterproof layer 16 and the front waterproof layer 20. Therefore, the water resistance is improved, and even if the saliva is adhered in the oral cavity, the coloring property is not affected at all, and the reliability is increased.

Since the one waterproof layer 16 is adhered to the back surface of the support 10, the back waterproof layer 16 does not peel off or move from the support 10. Therefore, the front waterproof layer 20 whose periphery is adhered and fixed to the back waterproof layer 16 is also the support 10
Will not move against.

The horseshoe-shaped pressure-sensitive sheet 22 thus waterproofed with the waterproof layers 16 and 20 has a wax layer 24 on one side thereof.
Is formed. The wax layer 24 is made of dental paraffin wax (JIS-T-6502), for example, 0.35 ±.
It is applied uniformly to a thickness of 0.03 mm. The wax layer 24 is preferably colored in a color close to a color complementary to the color developed by the pressure-sensitive sheet 22, and in this embodiment, bluish green or green is used.

A transparent synthetic resin film 25 is attached to the surface of the wax layer 24. As the film 25, for example, a thin flexible film having a thickness of several μm, which is commercially available as a food packaging wrap film, can be used. The film 25 is usually made by adding a softening agent such as a fatty acid derivative or a stabilizer such as epoxidized vegetable oil to a base material such as polyvinylidene chloride.

The film 25 can be directly adhered to the surface of the wax layer 24 and fixed by the adhesive force of the wax layer 24 itself. It is preferable that the outer periphery of the film 25 is slightly inside the outer periphery of the wax layer 24 and that the outer periphery of the pressure sensitive sheet 22 is substantially the same. In other words, the outer peripheral edge of the wax layer 24 projects slightly outward from the outer peripheral edges of the pressure sensitive sheet 22 and the film 25. In this way, the film 25 is attached to the wax layer 24 to complete the occlusal force diagnostic sheet 26.

The occlusal force diagnostic sheet 26 is fixed to a cardboard holder 28 as shown in FIG. As shown in FIG. 3, the holder 28 is formed by integrally forming an upper plate portion 30 and a lower plate portion 32 that are formed in a substantially Y shape, and a fold line 34 provided on the base portions 30a and 32a. The upper plate portion 30 can be overlapped with the lower plate portion 32 by bending at. This folded base portion 30a,
The reference numeral 32a serves as a knob portion for the operator to hold with a finger.

Base portion 30 of upper plate portion 30 and lower plate portion 32
arm portions 30b and 32 that bifurcate from a and 32a
The b is curved so as to be substantially along the outer peripheral edge of the occlusal force diagnostic sheet 26 in a substantially semicircular shape.

The holder 28 is fixed to the occlusal force diagnostic sheet 26 as shown in FIG. That is, the lower plate portion 32
The outer peripheral edge of the occlusal force diagnostic sheet 26 is aligned and placed on the arm portion 32 b of the upper plate portion 30 and the lower plate portion 32 is folded at the folding line 34.
Fold it over. Then, the arm portion 30b of the upper plate portion 30 may be pressed against the arm portion 32b of the lower plate portion 32 in an overlapping manner.

Since the wax layer 24 has appropriate flexibility and adhesiveness, when the peripheral edge of the occlusal force diagnostic sheet 26 is sandwiched between the arms 30b and 32b and pressed, the wax layer 24 flows. As shown in FIG. 6, both arm portions 30b, 32
Stick to b. As a result, both arm portions 30b and 32b are bonded to each other by the wax layer 24, and the holder 28 and the occlusal force diagnostic sheet 26 are integrated.

This occlusal force diagnostic sheet 26 is used for the holder 2
The bases 30a and 32a, which are the knobs of 8, are inserted into the open mouth of the patient, and are attached so as to evenly hit the upper part of the upper dentition. When the patient gently bites, the pressure applied between the upper and lower teeth is applied to the wax layer 24 through the film 25, and the entire tooth profile of the dental arch is recorded as unevenness on the wax layer 24.

At this time, since the film 25 is thin and soft,
It deforms easily following the tooth profile and does not affect the tooth profile formed in the wax layer 24. At the same time, the pressure applied between the upper and lower teeth is applied to the pressure-sensitive sheet 22, and only the place where this pressure is applied develops color to a density corresponding to the magnitude of this pressure. In this embodiment, the color is red.

FIG. 7 is a cross-sectional view of another occlusal force diagnostic sheet 26A, and FIG. 8 shows the same as FIG.
FIG. 6 is a cross-sectional view taken along the line VI-VI.

In this embodiment, the wax layers 24 and 24A are laminated on both sides of the pressure-sensitive sheet 22, and the films 25 and 25A are attached to the surfaces thereof, respectively. According to this embodiment, the meshing of the upper and lower dentitions can be recorded separately in the wax layers 24 and 24A.

In this way, the occlusal force diagnostic sheet 26 (26A) in which the color development of the density according to the occlusal force is recorded on the pressure sensitive sheet 22 and the tooth pattern is recorded on the wax layer 24 (24A) is as follows.
The occlusal force is diagnosed by taking it out from the mouth of the patient, storing it in the cassette according to the present invention, and loading it in the occlusal force diagnosing device.

FIG. 9 is an external perspective view of this apparatus, FIG. 10 is a functional block diagram thereof, FIG. 11 is a side view of a cassette for accommodating the occlusal force diagnostic sheet 26, FIG. 12 is a plan view, and FIG. 13 is XIII in FIG. -XIII sectional view, FIG. 14 is an exploded perspective view of the cassette, FIG. 15 is a side view showing the internal structure of the scanner, FIG. 16 is an operation flow chart, and FIG. 17 is a diagram showing a print output example.

Positioning small holes 36, 36 are formed in the bases 30a, 32a of the holder 28 so that the upper plate 30 and the lower plate 32 are overlapped with each other by folding along the folding line 34. Further, it is desirable to attach various marks 38, 40 as shown in FIG. 5 to the bases 30a, 32a. For example, if a cross-shaped mark 38 is provided near the gathering portion of the arm portion 30b and the base portion 30a of the upper plate portion 30, the occlusal force diagnosis can be performed by aligning the mark 38 near the center of the front tooth of the patient. It is possible to make it easy to correctly confirm the insertion position of the sheet 26. If the ID mark 40 for patient identification is attached, it is convenient for organizing and managing the occlusal force diagnostic sheet 26 after the examination.

Further, a bar code 42 may be attached to the holder 28 as shown in FIG. 3 so that the size and type of the sheet 26 or the front / back / left / right can be automatically discriminated by a scanner 54 described later. . Further, the density reference 44 may be attached based on the reading characteristics of the scanner 54. The date of further diagnosis (diagnosis date) may be attached.

In FIG. 9, reference numeral 50 designates a vertically long casing, in which a CRT 52 as a display means is accommodated in the upper part thereof, a scanner 54 is accommodated thereunder, and a printer 56 is accommodated in the lowermost part.
The scanner 54 and the printer 56 can be operated from the front surface of the housing 50. The scanner 54 has a pair of upper and lower color scanners 54A and 54B for reading images on both sides of the occlusal force diagnostic sheet 26 stored in a transparent cassette 58.

Next, the structure of the cassette 58 will be described.
As shown in FIGS. 11 to 14, the cassette 58 includes transparent plates 60 and 62 as a pair of upper and lower substrates that can be opened and closed, and the bite force diagnosis sheet 26 with the holder 28 is sandwiched therebetween. That is, a handle member 64 is fixed to one end of the lower transparent plate 62, and a hinge member 66 is fixed to the other end, and the upper transparent plate 60 is pivotally attached to the hinge member 66 so as to be rotatable.

The lower transparent plate 62 is provided with positioning protrusions 68, 68 which engage with the positioning small holes 36, 36 provided in the holder 28. The holder 28 is positioned by the protrusions 68, 68 and sandwiched between the transparent plates 60, 62 to be held. Protrusions 60a and 60b are formed on the left and right edges of the transparent plate 60 above. These ridges 6
0a, 60b hit the lower transparent plate 62 and both transparent plates 60,
The tooth pattern recorded on the wax layer 24 (24A) of the occlusal force diagnostic sheet 26 is transparent plate 60, while keeping the interval of 62 constant.
62 holds sheet 26 flat without crushing.

The cassette 58 holding the sheet 26 flat is inserted into the insertion opening 70 of the scanner 54 opening on the front surface of the housing 50 and positioned at a predetermined position in the scanner 54. Here, the cassette 58 is the occlusal force diagnostic sheet 2
The holder 28 of No. 6 is inserted toward the front, and the vertical direction is confirmed so that the surface on which the dental arch of the upper jaw is recorded faces upward.

A pair of upper and lower color scanners 54A and 54B
The first mirror box 72 (72A, 72B) that moves along the upper and lower surfaces of the cassette 58 as shown in FIG. 15, and the second mirror box 72 that moves in the same direction as the first mirror box 72 at a half speed. Mirror box 74 (74A, 74B) and scanner 5
Lens 78 (78A, 78A) fixed to the case 76 of No. 4
B) and CCD line sensor 80 (80A, 80B)
With.

The images of the upper and lower surfaces of the occlusal force diagnostic sheet 26 are
It is guided to the first mirror box 72 and the second mirror box 74 through the transparent plates 60 and 62 of the cassette 58, and the lens 7
8 forms an image on the line sensor 80. By moving the first and second mirror boxes 72 and 74 in this manner, it is possible to simultaneously read the upper and lower images of the occlusal force diagnostic sheet 26. This optical system has a large depth of focus, and can also read satisfactorily a tooth mold formed on the wax layer 24 of the occlusal force diagnostic sheet 26.

The image signal read by the line sensor 80 is C
The image data is read by the PU 82 (FIG. 10), subjected to predetermined image processing, and stored in the memory 84. The contents of this image processing are instructed from the keyboard 86. And the processing result is CRT5
2 and is printed out on the printer 56. The printer 56 outputs an image on a transparent print paper 88 by a thermal head 90.

The CPU 82 performs various spatial filtering processes such as an edge enhancement process and an averaging process on the image read by the scanner 54, and determines the pressure P with respect to the color density D of the pressure sensitive sheet 22, that is, the occlusal force, to a predetermined PD characteristic curve. Calculate using.

The CPU 82 also performs an arbitrary operation selected from the keyboard 86 from among a plurality of types of operations. For example, the following calculation is performed. (1) Obtain the distribution of occlusal force. (2) Find the balance of occlusal force before, after, left and right.
(3) Obtain the XY distribution of the occlusal force for each area partitioned by the XY axes. (4) Draw a mountain whose height changes according to the size of the occlusal force and display its distribution three-dimensionally. (5) Find the center of occlusal force (center of gravity). (6) Obtain the average pressure of the occlusal force within a predetermined range.

Next, the operation of this embodiment will be described with reference to FIG. First, the occlusal force diagnostic sheet 26 bitten by the patient is set in the cassette 58, and is inserted into the insertion opening 70 of the scanner 54 with the surface of the upper jaw on which the tooth pattern is recorded facing up.
00). Then, the scanner 54 reads the ID mark 40 and the other marks 42 and 44 (step 102). CPU8
In step 2, the name of the patient is read from the ID mark 40, and the size and type of the sheet 26 are discriminated and recorded in the memory 84 (step 104).

The CPU 82 determines the image range to be read from the size of the sheet 26 (step 106), and scans this range twice or once depending on the presence or absence of the wax layer 24 (step 108). For example, for the surface having the wax layer 24, the wax layer 24 is formed by the first scan.
The image of the tooth profile due to the concavities and convexities recorded in is read, and the image showing the occlusal force recorded in the pressure sensitive sheet 22 is read in the second scan. The presence or absence of the wax layer 24 indicates the mark 4
This can be known by discriminating the type of the sheet 26 according to 2.

The read image is subjected to appropriate image processing and stored in the memory 84 (step 110).

Next, the density of the color image is obtained (step 112). The pressure P with respect to the density D, that is, the occlusal force is obtained using the PD characteristic curve (step 114).
The obtained occlusal force is tone-converted into a color corresponding to the magnitude of pressure (step 116) and stored in the memory 84 (step 118).

Next, a desired arithmetic processing mode is selected by the keyboard 86 (step 120). The calculation of the selected mode is performed (step 122), and the result is output to the CRT 52 or the printer 56 (step 12).
4, 126). For example, if the occlusal pressure distribution calculation mode is selected, an image as shown in FIG. 17 is output to the CRT 52 and the printer 56.

As shown in FIG. 17, in the occlusal force distribution, the occlusal force of the maxillary dental arch is displayed in a ∩ type in the upper stage, and the occlusal force of the lower jaw in the lower stage is opposed to this in a ∪ type. Is displayed. As described above, the occlusal force diagnostic sheet 26 is set in the cassette 58 in the direction shown in FIG. 12, and is inserted into the scanner 54 with the recorded surface of the upper jaw facing upward. And the occlusal force distribution of the upper and lower dental arches is displayed. For this reason, it is displayed in the same sense as at the time of medical examination, which facilitates diagnosis.

In FIG. 17, the occlusal force center G is obtained separately for the upper jaw and the lower jaw, and is indicated by G _U and G _L , respectively. Further, the name N of the patient read from the ID mark 40, the diagnosis date read from another mark, etc. are displayed. Further, the color density scale S is displayed based on the read density reference 44.

The occlusal force diagnostic sheet 26 which has undergone the image processing as described above is stored in the cassette 58 as it is. Therefore, a large number of cassettes 58 can be stacked and stored without damaging the occlusal force diagnostic sheet 26 or changing the tooth profile of the wax layers 24 and 24A, which facilitates handling.

FIG. 18 is a perspective view showing another embodiment of the cassette, FIG. 19 is a plan view, FIG. 20 is a bottom view, and FIG. 21 is FIG.
FIG. 22 is an end view of the XXI-XXI line in FIG.

The cassette 58A shown here has a pair of upper and lower transparent plates 60A, 62A, etc., and basically has the same structure as the cassette 58 shown in FIGS. However, in this cassette 58A, the lower transparent plate 6
A holder holding portion 62B into which the holder 28 of the sheet 26 is inserted and a recess 62C facing the sheet 26 are dug in the 2A. Here, the concave portion 62C is the holder holding portion 6
Deeper than 2B.

The upper transparent plate 60A is provided with a recess 60B facing the recess 62C. This recess 60B
A part of the peripheral edge of the holder holding part 62 of the lower transparent plate 62A
It is a holder holding portion 60C facing B. In addition, a part of the lower surface of the transparent plate 60A is used as it is as the holder holding portion 60C. That is, the area shown by the phantom line in FIG. 18 is the holder holding portion 62B on the side of the lower transparent plate 62A.
It is a holder holding portion 60C facing to. 68A
Is a positioning protrusion provided on the lower transparent plate 62A.

Therefore, when the sheet 26 with the holder 28 described in FIGS. 4 to 8 is loaded into the cassette 58A, the positioning projection 68A engages with the positioning small hole 36, and the holder 28 moves up and down as shown in FIG. It is held between the holder holding portions 60C and 62B. 21 and 22 show
As is clear with reference to FIGS. 4 and 5, the arm portions 30b and 32b of the holder 28 have the holder holding portions 60C and 62b.
The state of being held between B is shown.

For this reason, the holder 28 includes the upper and lower transparent plates 60.
It does not move between A and 62A. The sheet 26 is located between the recesses 60B and 62C, and the upper and lower transparent plates 6 are
Both transparent plates 60 without direct contact with 0A and 62A
A gap is always maintained between A and 62A.

This cassette 58A includes an upper transparent plate 60.
The density reference 44A, 44B is attached to A, and the transparent plate 6 below
A bar code 44C indicating the density of each of the density references 44A and 44B is attached to 2A. Although the density reference 44 is attached to the holder 28 in FIG. 5, when the density reference 44 is attached to the holder 28 by printing, the color and the density of the density reference 44 change due to changes in printing conditions. It is easy to do, and the accuracy may decrease. On the other hand, cassette 5
By attaching the density references 44A and 44B to 8A, the density of the image can be accurately measured even if the holder is changed.

Further, the shape of the holder 28 can be variously modified, and it is desirable that the holder 28 be easily bent so that it can be easily inserted into the mouth of the patient. The holders 28A and 28B shown in FIGS. 23 and 24 are provided with folding lines 28a and 28b by perforations or the like.

That is, the holder 28A of FIG. 23 is provided with a folding line 28a formed by perforations along the axis of symmetry A of the holder 28A. The holder 28B of FIG. 24 is provided with a pair of broken lines 28b at symmetrical positions sandwiching the axis of symmetry A. Note that the polygonal lines 28a and 28b may be lines in which traces are left by pressure instead of perforations.

FIG. 25 shows still another embodiment of the holder 28C. The holder 28C sandwiches only the vicinity of the center of the outer periphery of the occlusal force diagnostic sheet 26 from the upper and lower surfaces, and notches 30D and 30D are formed on both edges of the base portion 30C as a knob so as to be substantially along the outer periphery of the occlusal force diagnostic sheet 26. Has been done.

When the occlusal force diagnostic sheet 26 with the holder 28C is used, the holder 28C does not get in the way of the oral cavity when it is put in the oral cavity, and the upper and lower tooth profiles do not shift to the left and right, and a natural feeling is felt again. You can occlude without receiving it. Therefore, it is suitable for correctly detecting the occlusal force in the natural occlusion state.

The notches 30D and 30D allow the lips to be sufficiently closed while being inserted into the oral cavity. For this reason, it is particularly suitable for patients with total dentures to occlude the dentures while keeping the dentures stable in the oral cavity.

With respect to the sheet 26 with the holder 28C shown in FIG. 25, not only the holder 28C is held by the holder holding portions provided on the upper and lower substrates of the cassette, but also the outer peripheral edge of the sheet 26 is sandwiched and held. It is desirable to put it. For example, the holder 28C is continuous with the holder holding section.
It is also possible to attach cardboards having a thickness of half the above to both substrate sides, and hold these cardboards in contact with the outer peripheral edge of the sheet 26.

In the above embodiments, the cassettes 58, 58A
Since both substrates are transparent plates 60, 62, 60A, and 62A, images on both sides of the occlusal force diagnostic sheet 26 can be read by the scanner 54. However, the cassette of the present invention includes one in which only one substrate is transparent. In this case, the scanner can read an image of only one side of the occlusal force diagnostic sheet 26 through this transparent substrate.

Further, in the above embodiments, the holders 28, 2
Small holes 36 provided in 8A and 28B and transparent plates 62 and 62A
The positioning means is formed by engaging with the projection 68 provided on the. However, it goes without saying that the positioning means of the present invention is not limited to this.

[0068]

As described above, the invention of claim 1 sandwiches the occlusal force diagnostic sheet with a holder between a pair of substrates at least one of which is transparent, and positions the holder and the occlusal force diagnostic sheet on the cassette by the positioning means. Therefore, the image recorded on the occlusal force diagnostic sheet can be read by the scanner through the transparent substrate. Therefore, even if the occlusal force diagnostic sheet bends or deforms due to the patient biting, the sheet can be held flat by being sandwiched between the pair of substrates. Therefore, the sheet can be easily and efficiently set on the scanner, and the image reading work can be efficiently performed.

Further, since the occlusal force diagnostic sheet can be held and managed while being sandwiched between the cassettes, the occlusal force diagnostic sheet is not scratched during storage and the handling is easy.

Here, the positioning means of the holder can be configured so that the projections provided on the substrate side are engaged with the plurality of positioning small holes provided in the holder (claim 2). Also, in the case where a wax layer is provided on at least one surface of the occlusal force diagnostic sheet and the tooth pattern is recorded by the unevenness of the wax layer, the tooth pattern shape of the unevenness of the wax layer is maintained by keeping the interval between both substrates of the cassette constant. It is desirable not to crush (Claim 3).

If the holder is provided with a fold line in advance and the holder is bent and bent along the fold line, the work is facilitated. The holder thus bent and the sheet strongly bitten by the patient are not flat, and thus are difficult to stabilize in the cassette. In such a case, a holder holding portion for pressing the holder portion is provided on the substrate, and by pressing the holder portion, the sheet is stabilized and the image can be read accurately (claim 4).

[Brief description of drawings]

FIG. 1 is a plan view of an occlusal force diagnostic sheet used in the present invention.

[Fig. 2] Partial sectional view of the occlusal force diagnostic sheet

[Figure 3] Development view of the holder

FIG. 4 is an explanatory view of the assembling procedure.

FIG. 5 is a diagram showing a state where a holder is attached.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view showing another embodiment of the occlusal force diagnostic sheet.

FIG. 8 is a sectional view taken along the line VI-VI in FIG.

FIG. 9 is an external perspective view of this device.

FIG. 10 is a functional block diagram thereof.

FIG. 11 is a side view of the cassette.

FIG. 12 is a plan view of the cassette.

13 is a sectional view taken along line XIII-XIII in FIG.

FIG. 14 is an exploded perspective view of the cassette.

FIG. 15 is a side view of the scanner.

[Fig. 16] Operation flow chart

FIG. 17 is a diagram showing an example of print output.

FIG. 18 is a perspective view showing another embodiment of the cassette.

FIG. 19 is a plan view of this cassette.

FIG. 20 is a bottom view of the same.

21 is an end view taken along line XXI-XXI in FIG.

FIG. 22 is a partially enlarged view of FIG. 21.

FIG. 23 is a view showing another embodiment of the holder.

FIG. 24 is a view showing another embodiment of the holder.

FIG. 25 is a view showing another embodiment of the holder.

[Explanation of symbols]

 24, 24A Wax layer 26 Occlusal force diagnostic sheet 28, 28A, 28B, 28C Holder 28a, 28b Folding line 30a, 32a, 30C Base portion 36 as a knob 36 Positioning small hole 58, 58A Cassette 60, 62, 60A, 62A Substrate Plate 60B, 62C Recessed portion 60C, 62B Holder holding portion 68, 68A Positioning protrusion

Claims (4)

[Claims] 1. A cassette for accommodating an occlusal force diagnostic sheet with a holder, the holder of which is fixed to the outer peripheral edge of a pressure-sensitive sheet having both surfaces covered with a waterproof layer, wherein the holder and the occlusal force diagnostic sheet are provided. A cassette of an occlusal force diagnostic sheet, comprising a pair of substrates sandwiching at least one of which is transparent, and positioning means provided on at least one of both substrates for positioning the holder. 2. The holder is provided with a knob portion, the knob portion is formed with a plurality of small holes for positioning, and the substrate is formed with a plurality of positioning projections with which the small holes are engaged. 1 bite force diagnostic sheet cassette. 3. The occlusal force diagnostic sheet has a wax layer laminated on at least one surface thereof, and a predetermined gap is held between the pair of substrates with the occlusal force diagnostic sheet sandwiched therebetween. Or 2 bite force diagnostic sheet cassette. 4. A holder holding portion for holding a holder at a substantially symmetrical position of an outer peripheral edge of a pressure sensitive sheet, and a concave portion opposed to each other while holding a gap in the pressure sensitive sheet are formed on opposing surfaces of a pair of substrates. The occlusal force diagnostic sheet cassette according to claim 1.