JPH1014971A - Corrector for treating abnormality of shape of auricle and manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the frequency of generating a corrector to one by performing a correction once by a large quantity without applying an excessive correction force to an auricle. SOLUTION: A wire 2 of a shape memory alloy which has a superelastic function and a specified range of transformation point temperature, preferably from 0 deg.C up to 37 deg.C is so arranged to memorize the shape thereof to match the shape of the auricle as target after treatment. The wire 2 is covered with a tube made of a porous buffer material 3, preferably drawn porous polytetrafluoroethylene(PTFE).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a correction device for correcting a morphological abnormality in a part formed of growing cartilage tissue, such as a pinna of a newborn baby, and a method of manufacturing the same.

[0002]

2. Description of the Related Art Conventionally, a metal wire having no elasticity, such as a steel wire coated with Ni plating or a non-elastic metal wire such as an orthodontic sample platinum wire, has been passed through a silicon rubber tube or the like for a correction tool for abnormal pinna morphology. Have been used.

[0003]

However, in the case of a conventional correction tool having no elasticity, when the correction amount of the pinna is large, if the correction is performed at once, an excessively strong correction force is applied to the pinna, causing inflammation. There was a problem. For this reason, it is necessary to gradually correct the pinna so that an unreasonable strong correction force is not applied to the pinna, and there has been a problem that the correction tool has to be prepared a plurality of times. In addition, since a conventional correction tool has no elasticity and a fixed shape, when a correction tool having a complicated shape is created, there is a problem that it is not easy to attach and remove the correction tool to an auricle.

Therefore, the present invention uses a correction tool having a superelastic force to perform a large amount of correction at once without applying an excessive correction force to the pinna, thereby reducing the number of times the correction tool is prepared once. It is intended to be able to be done. It is also intended to facilitate attachment to and removal from the pinna. It is another object of the present invention to easily and inexpensively manufacture this orthosis.

[0005]

According to the first aspect of the present invention,
A correction tool for treatment of auricular dysmorphia, which has a superelastic function and has a shape memory alloy wire having a transformation point temperature in a predetermined range according to a target pinna shape after treatment. It is characterized by being made by making it.

According to a second aspect of the present invention, the transformation point temperature of the shape memory alloy is 0 ° C. or more and less than 37 ° C.

The invention according to claim 3 is characterized in that the periphery of the shape memory alloy is covered with a porous cushioning material.

The invention according to claim 4 is characterized in that the buffer material is an expanded porous polytetrafluoroethylene (PTFE) tube.

According to a fifth aspect of the present invention, there is provided a method of manufacturing a correction tool for treating an auricular dysmorphia, the method comprising the steps of: The shape of the straightening tool is determined, a wire of a shape memory alloy is inserted into a machining groove of one flat plate, and the wire is stored in a shape on the single plane.

According to a sixth aspect of the present invention, there is provided a method of manufacturing a correction tool for treating a pinna morphological abnormality, the method comprising a plurality of planes approximating a target three-dimensional shape of the correction tool for treating a pinna morphological disorder. Determine the shape of the straightening tool, insert a wire of a shape memory alloy into the machining groove of the plurality of flat plates, attach the plurality of flat plates to a jig with a variable mounting angle between the plurality of flat plates,
The shape of the wire is stored in the shape of the plurality of planes.

According to the first aspect of the present invention, since the correction tool is made of a superelastic shape memory alloy, an extremely large correction force is not applied even when the correction tool is largely deformed and attached to the auricle. Even if the media grows and grows, and the amount of deformation of the orthosis changes, the orthodontic force applied to the pinna remains almost constant.
Further, when the pinna takes the target shape, no correction force is applied.

According to the second aspect of the present invention, by using a wire made of a shape memory alloy whose transformation point temperature is from 0 ° C. to less than about 37 ° C. which is the body temperature of the auricle, the transformation tool is cooled and the transformation point is cooled. If it is below the temperature, it can be deformed freely,
It can be easily attached to and removed from the pinna. When the temperature is higher than the transformation point temperature due to the body temperature when worn on the auricle, it can be deformed into the stored shape.

According to the third aspect of the present invention, since the periphery of the shape memory alloy is covered with the porous cushioning material, the pressure applied to the pinna can be dispersed, and the air permeability is good, so that the pressure ulcer can be reduced. Such inflammation is unlikely to occur.

According to the fourth aspect of the present invention, since expanded porous polytetrafluoroethylene (PTFE) is used as the cushioning material, the cushioning material can be made thin, and the super elastic property of the shape memory alloy can be reduced. There is no loss. In addition, since it is porous, has good air permeability, and has good biocompatibility, inflammation such as pressure sores does not easily occur.

According to the fifth aspect of the present invention, since a groove is formed in the flat plate and the groove is formed only on the processed plate, the processed plate is attached even when manufacturing a correction tool for another patient. The jig can be reused as it is, and only the groove processing on the processing plate needs to be redone.

According to the sixth aspect of the present invention, since a groove is formed on a flat plate and the groove is formed only on the work plate, the work plate is attached even when manufacturing a correction tool for another patient. The jig can be reused as it is, and only the groove processing on the processing plate needs to be redone. Further, when a plurality of flat plates are mounted on the jig, the mounting surfaces can be freely changed in angle, so that the same jig can be used as it is even when the mounting angle differs depending on the patient.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a specific example of an embodiment of a correction tool for treating an auricular dysmorphia according to the present invention will be described with reference to the drawings. FIG. 1 shows a correction tool for a so-called buried ear in which the pinna is buried on the temporal side as an embodiment of the correction tool for treating a pinna morphological abnormality according to the present invention. Shows the state of being mounted. The orthosis 1 is composed of a wire 2 and a cushioning material 3. The wire 2 is entirely a shape memory alloy whose transformation point temperature is from 0 ° C. to less than approximately 37 ° C., which is the body temperature of the auricle. It is formed of a Ti-Ni alloy having a function. The wire 2 is covered with an expanded porous polytetrafluoroethylene (PTFE) tube as the buffer material 3.

The use of an expanded porous polytetrafluoroethylene (PTFE) tube as a buffer material is based on the use of a conventional silicone rubber tube having a relatively high elasticity.
This would impair the superelastic properties of the shape memory alloy, but in the case of expanded porous polytetrafluoroethylene (PTFE) tubing, it can be very thin, soft and impair the superelastic properties of the shape memory alloy. Because there is nothing.

In addition, in the case of a nonporous silicone rubber tube, there is a possibility that pressure ulcer may occur due to steam when it comes into contact with the skin. However, expanded porous polytetrafluoroethylene (PTF)
E) In the case of a tube, since it is porous and has good air permeability and good biocompatibility, inflammation such as pressure ulcer hardly occurs.

The wire 2 is formed in a target pinna shape, and connects an auricle part 2a to be attached to a newborn's auricle and a temporal part 2b to be attached to the temporal region of the base of the ear. And the connecting portion 2c. And the whole of them is covered with the cushioning material 3.

FIG. 2 shows another embodiment of the correction device for treating a morphological abnormality of the pinna according to the present invention, in which a correction device for a hypoplastic bipedal leg is mounted. Here, the dysplasia of the anti-wheel leg means that the upper leg of the anti-wheel does not originally exist at the portion E 'in the figure, and this portion is flat like its surroundings. . Thus, the upper leg is formed by pinching and lifting the portion E 'with the correction tool 1'. Therefore, the correction tool 1 '
Only the shape is different from that of the straightening tool 1 and the wire 2
And the cushioning material 3, and the material thereof is the same as that of the correction tool 1.

It should be noted that, in addition to the case where the buried ear or the counter leg is incompletely formed, for example, in the case of a broken ear, it is sufficient to prepare a correction tool only for the portion of the ear ring. What is necessary is just to make it adapt and to change the shape of a correction tool suitably.

As described above, the reason for using a shape memory alloy wire having a transformation point temperature of 0 ° C. to less than the body temperature of the pinna is as follows.
This is because, when the correction tool is immersed in ice water or the like and the temperature is lower than the transformation point temperature, the correction tool can be freely deformed and can be easily attached to and removed from the auricle. Also, when it is attached to the auricle and its body temperature is equal to or higher than the transformation point temperature, it can be deformed into a stored shape.

Next, a method of manufacturing the correction tool for treating a pinna morphological abnormality will be described with reference to FIGS. FIG. 3 shows the entire procedure of the manufacturing method. First, the target post-auricular shape is determined. The target pinna shape is created by taking the shape of the normal ear, the ear of a close parent such as a sibling into a computer, and performing left-right inversion and enlargement / reduction processing. Methods for capturing the three-dimensional shape of the pinna into a computer include a method using a laser, a method using a moiré fringe, and a method of inputting a cross-sectional image by directly or a molded plaster image using an X-ray CT apparatus. But this X-ray CT
The method of inputting a cross-sectional image by the device can most accurately reproduce the shape of the complicated uneven portion of the pinna.

Next, the contour of the auricle to be inscribed by the correction tool is extracted from the target three-dimensional shape of the treated pinna captured by the computer, and the correction tool shape is determined by following the contour. decide. For example, a correction tool for treating an implanted ear, even among abnormal pinna shapes, has a complex three-dimensional shape that passes from the base of the ear to the inside of the ear ring in order to pull out the implanted ear. For this reason, the outline of the temporal region (base of the ear) and the outline inside the ear ring are recognized, and the shape of the correction tool is determined by following these outlines.

Next, the shape of the straightening tool is changed to N for forming a groove in a flat plate.
Convert to C data. Therefore, first, one or more planes that best approximate the shape of the correction tool are obtained. Also, the intersection angle θ between these planes is determined. For example, orthotic for buried ear can consist planar portion P ₂ of the planar portion P ₁ and the helix part of the side of the head (the base of the ear), as shown in FIG. For this purpose, first, the regression planes P ₁ and P ₂ are obtained by the least squares method from the three-dimensional brace shapes of the temporal region and the ear cuff, and then the three-dimensional coordinates (X ₁ , Y ₁ and Z ₁ ) of the brace. Is converted to two-dimensional coordinates projected on these planes, for example, with the origin at O, and the two-dimensional coordinates are converted into NC data for groove machining.

Next, a description will be given, with reference to FIGS. 5 and 6, of a groove process for manufacturing a wire for a therapeutic orthosis. FIG. 5 shows a processed plate 4 in which a groove is formed in an ear ring portion.
FIG. 6 shows a processed plate 5 on which a groove has been formed in the temporal region. Groove processing is performed using a flat plate having a melting point higher than the temperature (350 ° C. to 500 ° C.) for shape memory, for example, an iron plate as the processing plates 4 and 5. The thickness of the processed plates 4 and 5 is about twice the diameter of the shape memory wire 2. In the four corners of both processing plates 4, 5,
An attachment hole 6 for screwing the processing plates 4 and 5 to a jig is formed.

Further, the width of the processing grooves 7 and 8 is processed by using an end mill having a diameter about 20% larger than the diameter of the wire so that the wire can be easily inserted. The depth of the processing grooves 7 and 8 is made equal to the wire diameter so that the wire can be completely inserted. At this time, in order to make it easier to insert the wire 2, the hole 10, the escape portion 9,
It is desirable that 11 be processed.

As described above, as the shape memory alloy, T
A wire 2 made of an i-Ni alloy shape memory alloy is used. Insert the wire 2 of this shape memory alloy into the grooved plates 4 and 5 and use a material whose melting point is higher than the temperature for storing shape memory.
A plurality of flat plates are attached to each other, and they are attached to a jig created so that the angles of the attachment surfaces can be freely changed.

Here, the jig for the buried ear will be described with reference to FIGS. 7 and 8. FIG. The jig 12 is provided with an earhook processing plate mounting portion 13 for attaching the earhook processing plate 4 and a temporal processing plate mounting portion 14 for mounting the temporal processing plate 5. Then, the wire 2 is mounted between the ear-ring processing plate 4 and the ear-ring processing plate mounting portion 13, and between the temporal processing plate 5 and the temporal processing plate mounting portion 14. The angle of intersection between the ear ring processing plate mounting portion 13 and the temporal processing plate mounting portion 14 is variable by hinges 15A to 15D.

Screws 16A to 16D are used for fixing nut 1
9A, 19B and a fixing nut (not shown), the fixing plate
Through the groove 18a formed in the groove. Then, the adjusting nut 17A for the screws 16A to 16D is adjusted so that the intersection angle between the two processing plates 4 and 5 becomes the predetermined angle θ.
To 17F, and the position of an adjustment nut (not shown) provided at a position facing the adjustment nuts 17C and 17D.

In using the jig 12, first, the side portion 2b of the wire 2 is fixed between the side portion processing plate 5 and the side portion processing plate mounting portion 14 with the side portion 2b positioned in the processing groove 8. I do. Next, with the auricle part 2a of the wire 2 positioned in the processing groove 7, the earring part processing plate 4 is fixed to the earring part processing plate mounting part 13. Then, the positions of the adjustment nuts 17A to 17F and the adjustment nut (not shown) with respect to the screws 16A to 16D are adjusted so that the intersection angle between the two processing plates 4 and 5 becomes θ. In this state, the jig 12 is placed in an electric furnace and the shape is stored at a predetermined temperature and time.

Lastly, if there is an extra portion at both ends of the wire 2 whose shape has been memorized, the wire is cut off and passed through an expanded porous polytetrafluoroethylene (PTFE) tube as a cushioning material 3 to complete the straightening tool 1. Note that the tube is made longer than the wire 2 so that the end of the wire 2 does not directly touch the skin.

Although the above description has been made in connection with the manufacture of a correction tool for buried ears, a correction tool for other uses can be produced in the same manner. For example, in the case of a broken ear, it is sufficient to create a correction tool only for the portion of the ear ring, and in the case of an auricular dysplasia due to dysplasia of the opposite leg, create a correction tool for sandwiching and forming the opposite leg. A similar method can be used for the case. In this case,
The upper and lower sides are each grooved in the processing plate according to the target shape of the anti-wheel leg after treatment, and after inserting the shape memory alloy, it is set at an angle necessary to sandwich the anti-wheel leg. What is necessary is just to attach to a tool and to make a shape memory, and to make a correction tool.

In the method of manufacturing a correction tool for treating a morphological abnormality of an auricle according to the present invention, since the flat tool is manufactured by grooving, a three-dimensional processing machine requiring expensive and complicated programming is not required. Also, processing can be easily performed with an inexpensive two-dimensional processing machine. Further, since the groove processing is performed only on the processing plate, even when manufacturing a correction tool for another patient, the jig for mounting the processing plate can be reused as it is, and only the groove processing on the processing plate needs to be performed again. Further, since the mounting surfaces can be freely changed in angle when mounting a plurality of flat plates on the jig, the same jig can be used as it is even when the mounting angle differs depending on the patient.

[0036]

According to the first aspect of the present invention, there is no problem that an excessively strong correction force is applied to the pinna to cause inflammation, a large amount of correction is performed at a time, and the number of times of forming the correction tool is reduced by one. It is possible to provide a correction tool for treating an auricular dysmorphia that can be completed in a single round.

According to the second aspect of the present invention, it is possible to provide a correction tool for treating a morphological abnormality of the pinna, which can be easily attached to and removed from the pinna.

According to the third aspect of the present invention, it is possible to provide a correction device for treating a morphological abnormality of the pinna which has good air permeability and is less likely to cause inflammation such as pressure sores.

According to the fourth aspect of the present invention, it is possible to provide a correction tool for treating an auricular dysmorphia which does not impair the superelastic property of the shape memory alloy and is less likely to cause inflammation such as pressure sores. it can.

According to the fifth or sixth aspect of the present invention, since the processing can be easily performed by an inexpensive two-dimensional processing machine, it is possible to produce a straightening tool at low cost.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a case where a correction tool for treating an auricular dysmorphia according to the present invention is used for an implanted ear.

FIG. 2 is a schematic view showing a case where the orthodontic treatment device for auricular pinna according to the present invention is used for correcting anastomosis.

FIG. 3 is a block diagram showing a procedure for producing a correction tool according to the present invention.

FIG. 4 is a diagram showing a regression plane on the side of the ear ring and the side of the temporal side of the orthodontic implant.

FIG. 5 is a perspective view showing an ear-ring-side grooved plate for producing the implantable ear correction tool of FIG. 1;

FIG. 6 is a perspective view of a temporally grooved plate for producing the implantable ear correction tool of FIG. 1;

FIG. 7 is a perspective view showing a shape memory jig of the correction tool for buried ears used in the correction tool for treating an auricular dysmorphia according to the present invention.

FIG. 8 is a side view of the shape memory jig of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Correction tool 2 Wire rod 3 Buffer material 4 Earring processing plate 5 Temporal processing plate 6 Mounting hole 7, 8 Processing groove 9, 11 Relief part 10 Hole 12 Jig 13 Earring processing plate mounting part 14 Temporal processing plate Mounting part 15A to 15D Hinge 16A to 16D Screw 18 Adjustment plate 17A to 17F Adjustment nut 18 Adjustment plate 19A, 19B Fixing nut

Claims (6)

[Claims] 1. A wire made of a shape memory alloy having a superelastic function and having a transformation point temperature in a predetermined range is formed by shape memory in accordance with a target pinna shape after treatment. Correction tool for the treatment of morphological abnormalities of the pinna. 2. The orthodontic treatment device of claim 1, wherein the shape memory alloy has a transformation point temperature of 0 ° C. or more and less than 37 ° C. 3. The orthodontic treatment device for a pinna according to claim 1, wherein the shape memory alloy is covered with a porous buffer material around the shape memory alloy. 4. The orthodontic treatment device for a pinna according to claim 1, wherein the cushioning material is an expanded porous polytetrafluoroethylene (PTFE) tube. 5. A correction tool shape on a single plane that approximates a three-dimensional shape of a target correction tool for auricular morphological abnormalities is determined, and a wire of a shape memory alloy is inserted into a processing groove of one flat plate. A method for manufacturing a correction tool for treating an auricular morphological disorder, comprising inserting the wire into a shape on the single plane and storing the shape in the shape of the single plane. 6. A correction tool shape on a plurality of planes approximating a three-dimensional shape of a target correction tool for auricular morphological abnormality is determined, and a wire of a shape memory alloy is inserted into a processing groove of the plurality of flat plates. Inserting the plurality of flat plates into a jig in which the mounting angles of the plurality of flat plates are variable, and storing the wire in a shape on the plurality of flat surfaces; A method for producing a correction tool for treating morphological abnormalities.