JP2004065482A - Plate dilator for removable plate orthodontics unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a plate dilator for a removable plate orthodontics unit which is safety, takes shorter time to adjust and can easily and surely be adjusted by easily adjusting an upper limit of a dilating distance while keeping the feature and operation effect of a conventional spring type dilator and miniaturizing the dilator as a technical theme. <P>SOLUTION: From the mutually opposing end faces of a pair of right and left blocks connected through a connection bar in the state of being movable relatively to the left and right, at least a pair of pipes slidably housing coil springs for presenting repulsing force inside with both of the right and left ends projecting is assembled to at least a pair of cylinder holes formed respectively at the blocks in a freely insertable and slidable manner. A stopper mechanism for adjustably deciding the upper limit of the dilating distance between the pair of the blocks by the repulsive force along the connection bar is provided between the connection bar and the blocks. A part of the pair of the blocks are respectively buried and fixed to resin. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
[Industrial applications]
The present invention relates to a floor dilator in a so-called removable floor straightening device.
[0002]
[Prior art]
Removable floor orthodontic appliance is a type of plastic called a plate-like resin that allows removal (removable) of teeth, dentition, and jawbone instead of using wires, and incorporates a maintenance device (clasp) into the orthodontic appliance. And the point of action (the mounting base of the reduction mechanism or the expansion mechanism). It is extremely easy to handle because a resin that can be easily installed in the mouth is used as a mounting base for the correction mechanism. This is not only the fear of tooth extraction, but also a variety of inconveniences (lost movement control, disruption of occlusal balance, triggers and causes of temporomandibular disorders). It is also used for jawbone expansion devices.
[0003]
In other words, in the inter-dentition expansion, as shown in FIG. 13, the two-part resin floors 1 and 1 ′ formed along the inner surface of the mouth have molar teeth 3a, 3b, Attach clasps 5a, 5b, 6a, 6b as maintenance devices to be attached to 4a, 4b, and extend a dilator 7 between the resin floors 1, 1 ', and attach clasps 5a, 5b, 6a, The space between the two rows of teeth is expanded by the attachment / removal of the 6b by attachment / detachment and the expansion bias A in the direction away from the teeth by the expander 7, thereby enabling non-extraction correction.
[0004]
In addition, in the inter-molar expansion, as shown in FIG. 14, the resin floor 8 formed along the inner surface of the mouth is cut and divided at the nine molars to be subjected to non-tooth extraction correction, Clasps 10a and 10b attached to the front and rear teeth 9a and 9b of the posterior teeth 9 are attached to the floor 8 and the dividing portion 8a, respectively. Further, a clasp 11a as a maintenance device is provided on the opposite side of the floor 8 of the main body. , 11b are attached, and the dilator 7 is mounted on a divided portion of the molar 9 to allow the molar 9b to move in the back-to-chin direction B.
[0005]
As is apparent from the above description, since the resin floor 1, 1 ', 8, 8a must be expanded and biased in the predetermined directions A, B by the expander 7, the expander 7 is connected via the action point. The resin 1, 1 ', 8, 8a must be able to apply an expansion bias in a predetermined direction A, B, or the like.
[0006]
For example, the dilator 7 described in Japanese Patent Publication No. 62-5622 is provided with two pressure transmitting nuts 12, 13 as shown in FIGS. The screw 14 is screwed into an operating screw 14 having an opposite threading direction, and a large-diameter operating portion 15 is provided at the center of the screw 14. A pair of guide rods 16, 16 are sandwiched between the screws 14. It is arranged parallel to the screw 14.
[0007]
Further, as shown in FIGS. 17 and 18, the dilator described in Japanese Patent Application Laid-Open No. 2000-139954 filed by the applicant of the present application is connected to at least a pair of cylinders 26, 26 integrated via a connection arm 25. At least one pair of piston rods 28, 28 integrated via 27 are assembled via an internal spring 29 for resilient force while preventing them from falling off, and the respective ends of the cylinder 26 and piston rod 28 are attached. It is used buried in resin.
[0008]
[Problems to be solved by the invention]
The above-mentioned conventional dilator 7 (hereinafter referred to as a conventional screw type dilator) described in Japanese Patent Publication No. 62-5622 is extremely troublesome in use. explain. In other words, a large-diameter operating portion 15 is provided at the center of the screw 14, and the adjustment of the interval S made by a pin bar or the like can be freely performed. Normally, this adjustment is set before the mouth is attached. Since the set amount is naturally limited within the limit of the wearable state and depends on the reaction force accumulated by the forcible wearing, adjustment must be made according to the therapeutic effect (expansion). For example, in the case where the screw 14 is basically used at a 1/4 rotation of 90 degrees in principle and is opened by 0.2 mm at a 1/4 rotation, the maximum is twice a week.
[0009]
As described above, since the mechanism of the expansion force expression is a fixed interval, the expansion ability, that is, the therapeutic effect is limited, and repeated adjustment and management are required. Because of this lack of flexibility, if the patient interrupts use, the device may not be able to enter the device at all, or the device may not be able to enter the device at all. If the screw is long, it will be incompatible, and even if the screw is not rotated in the reverse direction, it will not even be possible to mount it again.
[0010]
In addition, a mechanism in which guides such as guide rods 16 are provided on both sides to complement and transmit the point-like expanding force exerted by the screws 14 and the like to the pressure transmitting nuts 12 and 13 (operating points) having a wide width. Despite its size limitations, it has a complex and unavoidable irrationality, which complicates design and manufacturing.
[0011]
Further, the dilator described in Japanese Patent Application Laid-Open No. 2000-139954 (hereinafter referred to as a conventional spring type dilator) solves the problems of the conventional screw type dilator by combining a cylinder with a spring and a piston rod. The following effects are obtained.
(1) It is epoch-making because it allows easy attachment and detachment and continuous expansion without adjustment.
(2) Since the point of action of the extended urging force can be formed horizontally without requiring assistance, simplification and miniaturization can be expected.
[0012]
However, the above-mentioned conventional spring-type expander has a large spring expansion stroke and has no limit, so that a continuous pushing force is applied even when the teeth move, so that the patient neglected the medical examination by a doctor. May cause the teeth to move more than necessary, and the overall length is at least twice the length of the spring because the spring is housed between the cylinder and the piston rod. There is a problem that there is a limit to miniaturization.
[0013]
The present invention has been made in order to solve the above-mentioned problems, and it is possible to easily adjust and determine the upper limit of the expansion distance while maintaining the features and effects of the conventional spring type expander. The technical problem is to make the configuration capable of further downsizing a floor expansion in a removable floor straightening device which is more secure, requires less labor for adjustment, and can be easily and reliably adjusted. The purpose is to provide a vessel.
[0014]
[Means for Solving the Problems]
Means of the present invention according to claim 1 of the present invention for solving the above-mentioned problem is that a pair of left and right block bodies connected to each other by a connecting rod so as to be relatively movable in the left-right direction are connected to each other. At least one pair of pipe bodies is inserted and slidably inserted into at least a pair of cylinder holes formed in each of the bodies so that both right and left ends of a coil-shaped spring body for expressing resilience are protruded and slidably housed therein. A structure in which a stopper mechanism that adjustably adjusts an upper limit of an extension distance between the pair of block bodies by a spring resilience along the connecting rod so as to be adjustable is provided between the connecting rod and the block body. ,
That a part of the pair of blocks is embedded and fixed in the resin,
It is in.
[0015]
According to the above configuration, the pair of left and right blocks move away from each other due to the elasticity of the spring, that is, receive a force in the expanding direction, so that the portion embedded in the resin of the block acts as a direct action point. , Giving power for correction.
[0016]
Because the spring is used to generate the expansion force, the expansion force (elasticity) can be maintained over a large stroke range with forward and backward movements, similar to a conventional spring-type expander. In this case, no adjustment is required at the time of re-attachment, and a retreat is secured at the time of attachment / detachment. Is eliminated.
[0017]
In addition, a stopper mechanism is provided between the connecting rod and the block body so as to adjustably adjust the upper limit of the expansion distance between the pair of block bodies due to the elasticity of the spring along the one connecting rod. There is no fear that the expansion is excessive due to the stopper mechanism.
[0018]
Furthermore, since the upper limit of the expansion distance can be adjusted, by gradually expanding the upper limit, the effect of the conventional spring expander having a large expansion stroke can be gradually or systematically exhibited. However, a sufficient therapeutic effect can be exhibited without replacing the dilator.
[0019]
Further, in this configuration, since there is no portion corresponding to the piston of the conventional spring-type expander, the outer length can be reduced with respect to the same spring length, and the size can be further reduced.
[0020]
In addition, since a resilient force is applied to the block body by at least one pair of springs instead of one, the force acts in a fixed direction without being displaced, so that the teeth can be accurately moved in a predetermined direction. .
[0021]
Furthermore, if the cylinder holes are arranged in parallel to the block body, a horizontally long working point can be easily formed, and the whole can be designed to be flat, so that a single horizontally long working point can be formed. In other words, since it is easy to match the expansion force manifestation point with the action point on the resin, no assistance of a guide is required for uniform transmission, so simplification and miniaturization can be expected.
[0022]
Further, since the spring is housed in the pipe body and the pipe body is slidably inserted into the cylinder hole of the block body, at least one pair of pipes together with the connecting rod is also provided in the left-right direction of the pair of block pairs. The effect as a movement guide is exhibited, and the movement of the block body can be stably achieved. Here, in order to achieve smoother movement of the block body, it is preferable that the pipe body be disposed at a symmetrical position from the center of the end face of the block body from the outside and inserted therethrough.
[0023]
The means of the invention according to claim 2 is the invention according to claim 1,
Forming a predetermined number of pin holes into which stopper pins are removably fitted from the upper part of the side peripheral surface of the cylindrical connecting rod at predetermined intervals in left and right rows,
A shaft hole through which the connecting rod is slidably inserted is formed from opposing end surfaces of the pair of block bodies, and a part of the shaft hole is opened upward from the upper surface. To do,
Assembling the connecting rod into the shaft hole of the block body, forming a stopper mechanism by locking a stopper pin inserted into a predetermined pin hole through the long hole and the long hole, and connecting the pair of block bodies,
It is in.
[0024]
The above configuration according to claim 2 relates to a stopper mechanism, in which a stopper pin is inserted into a pin hole provided at a predetermined interval in a connecting rod, and the stopper pin is engaged with a long hole formed in a block body, thereby The upper limit of the expansion distance between a pair of block bodies due to the resilience of a spring can be determined. Here, since the long hole is formed in the block body, the upper limit of the expansion is determined by the above-described locking, but the sliding operation in the contraction direction of the distance between the block bodies is not affected by the stopper pin. .
[0025]
In addition, by providing a predetermined number of pin holes at predetermined intervals in a row on the left and right, the upper limit position of the expansion width can be sequentially and accurately set according to the insertion position of the stopper pin.
[0026]
In particular, it is possible to adopt a method in which a plurality of stopper pins are inserted in advance, and the upper limit is gradually increased while sequentially removing the stopper pins from the inner stopper pins. According to this method, the positioning of the stopper pins and the pin holes can be performed. Is unnecessary, and the patient himself can easily achieve the adjustment operation of the upper limit setting.
[0027]
The means of the invention described in claim 3 is the invention according to claim 1,
The connecting rod is an operating screw provided with an operating part in the center and the way of cutting the screw is reversed on the left and right,
Forming a long hole whose cross-sectional shape is an ellipse from the upper surfaces of the pair of block bodies, and forming a shaft hole that penetrates from the opposite end surfaces to the side surface of the long hole and through which the connecting rod is slidably inserted. ,
Assembling the connecting rod into this shaft hole, forming a stopper mechanism by locking the nut and the long hole screwed to the left and right ends of the connecting rod, connecting a pair of block bodies,
It is in.
[0028]
The above-described configuration according to claim 3 also relates to a stopper mechanism, wherein the connecting rod is rotated around its axis by an operating portion located at the center of the connecting rod, and the operation of the operating screw is reversed on the left and right. By the function, the position of the nut can be adjusted, and the engagement between the nut and the elongated hole formed in the block body can determine the upper limit of the expansion distance between the pair of block bodies due to the elasticity of the spring. It is like that. Here, the upper limit of expansion is determined by the above-described locking by forming a long hole in the block body, similarly to the structure of the second aspect, but the sliding operation in the contraction direction is affected by the stopper mechanism. I do not receive.
[0029]
Further, according to this configuration, it is possible to continuously adjust the extension distance between the block bodies by the operation screw.
[0030]
According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, a center hole penetrating a body of the pipe from a longitudinally central upper surface of a side peripheral surface of the pipe is formed. The center pin is inserted into the center hole in a state where the spring is housed symmetrically.
[0031]
According to the above configuration, the position of the spring in the pipe body can be held substantially symmetrically by the center pin, so that the spring is unevenly distributed in the pipe body or, in an extreme case, only one side of the pipe body. Thus, it is possible to prevent the spring from protruding, to ensure smooth sliding in the cylinder hole of the pipe body, and to sufficiently exert the spring resilience of the spring.
[0032]
According to a fifth aspect of the present invention, in the first, second, third or fourth aspect of the present invention, the spring shaft pin is slid from both ends of the spring to the inside with the outer flange peripheral piece provided at the end as a fitting limit. And to be freely fitted.
[0033]
According to the above configuration, the spring shaft pin can hold the spring in a straight position and prevent the spring from being deformed improperly in the vicinity of the end face of the pipe body. When the part moves into the pipe body, the spring is prevented from catching on the end face of the pipe body, so that smooth expansion and contraction and movement of the spring can be ensured.
[0034]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. 1 to 10 show a first embodiment of the dilator of the present invention. The dilator of the present invention mainly comprises a pair of left and right block bodies 31, a connecting rod 41 for connecting the block bodies 31, and a spring 55. And a pair of stored pipe bodies 51.
[0035]
As shown in FIGS. 2 to 5, the outer shape of the block body 31 is a flat rectangular parallelepiped, and a pair of cylinder holes 32 through which the pipe body 51 is slidably inserted from the end face 33, and a connecting rod therebetween. A shaft hole 34 that is slidably inserted is formed, and an oblong hole 35 is formed with the shaft hole 34 opened upward from the upper surface. In addition, cutouts 36 are formed at the upper and lower ridges on the front and rear surfaces to ensure the fixing to the resin.
[0036]
The connecting rod 41 has a round rod shape, and three pin holes 42 are formed at right and left sides at an interval of 2 mm, that is, a total of six pin holes 42. A thread is engraved on a part of the inner peripheral surface of the pin hole 42. The stopper pin 43 is screwed. (See Figs. 8 and 9)
[0037]
FIG. 6 shows a state in which a spring shaft pin 56 for preventing an unauthorized deformation of the end of the spring 55 is fitted into the spring 55 with the outer flange piece 57 as a fitting limit. FIG. 4 is a plan cross-sectional view of the purp body 51, and a center hole 52 into which a center pin 53 for holding a spring 55 at a substantially symmetric position in the pipe body 51 is formed in the center.
[0038]
FIGS. 1, 8, and 9 show a state in which the block body 31, the connecting rod 41, and the pipe body 51 are assembled. FIG. A side sectional view, a pair of two pipe bodies 51 in which a spring 55 is housed with left and right ends protruding and a center pin 53 is inserted from a center hole 52 at the center is formed by a pair of block bodies 31 respectively. The force is applied to the cylinder hole 32 in a direction to extend the distance between the pair of block bodies 31 by the repulsive force of the spring 55.
[0039]
The connecting rod 41 is inserted into the shaft hole 34 of the pair of block bodies 31, the stopper pin 43 is inserted from the long hole 35 of the block body 31, and is screwed to the pin hole 42. This shows a state in which the stopper pins 43 are inserted into the two outer pins of the pin holes 42.) The stopper pins 43 and the long holes 35 are locked to form a stopper mechanism, and a pair of block bodies formed by a spring 55 The upper limit of the extension distance of 31 is determined, and excessive extension is reliably prevented.
[0040]
FIG. 10 is an explanatory diagram showing an example of a method of adjusting the extension distance during use, in which the stopper pins 43 are inserted into all the six pin holes 42 on the left and right, which are arranged at intervals of 2 mm in advance, when assembled. (See FIG. 10 (a), at this time, the distance between the end faces 33 of the pair of block bodies 31 is 1 mm), and pull out the stopper pins 43 one by one in order from the one located inside as the treatment progresses. As a result, the upper limit of the extension distance can be gradually increased systematically to 2, 4, and 6 mm (see FIGS. 10B, 10C, and 10D). (The spring 55 and the spring shaft pin 56 are omitted in (b) and (c).)
[0041]
In addition, such adjustment of the upper limit of the extension distance can be performed by screwing out and pulling out the stopper pin 43 without requiring a delicate operation of aligning the hole and the pin, etc. It can be implemented reliably. Further, since the stopper pin 43 is locked with the elongated hole 35, the distance between the pair of block bodies can be easily moved in the contraction direction when attaching and detaching the dilator.
[0042]
FIG. 11 shows another example in which the position of the spring 55 in the pipe body 51 is made substantially symmetrical, and a partition plate 54 is provided at the center in the longitudinal direction inside the pipe body 51. Are stored on the left and right sides of the pipe body 51.
[0043]
FIG. 12 is a plan sectional view showing a second embodiment of the dilator of the present invention. The configuration of the spring 55, the shape of the pipe body 51, and the structure of assembling the pipe body 41 to the block body 31 are the same as those of the first embodiment. However, the connecting rod 41 is provided with an operating portion 45 at the center on the left and right sides, and uses an operating screw 44 in which the direction of threading is reversed on the left and right. A stopper mechanism is formed by screwing a cylindrical nut 46 so as to fit, and locking the nut 46 with the elongated hole 35.
[0044]
In the second embodiment, the upper limit of the extension distance between the block bodies can be continuously adjusted by rotating the operation screw 44 by the operation section 45 and moving the position of the nut 46.
[0045]
【The invention's effect】
The present invention has the above-described configuration, and has the following effects.
According to the first aspect of the present invention, there is a concern that the conventional spring-type expander may be excessively expanded by the stopper mechanism while maintaining the features that it can be easily attached and detached and can be continuously expanded without the need for adjustment. In addition, by gradually adjusting the upper limit of the expansion distance, and gradually or systematically, the effect of the spring-type expander that the expansion stroke is large, it is possible to exhibit a sufficient therapeutic effect without replacement. The present invention provides a dilator that is highly safe, requires less labor for adjustment, can be adjusted easily and reliably, and has a high therapeutic effect.
[0046]
Further, since there is no piston portion in the conventional spring type expander, the outer length can be shortened for the same spring length, and the size can be further reduced.
[0047]
According to the second aspect of the present invention, the upper limit of the extension distance can be sequentially and accurately set according to the insertion position of the stopper pin. In particular, the upper limit is gradually increased while sequentially removing the stopper pin. A method can be adopted, and according to this method, the patient himself / herself can easily and reliably perform the operation of setting the upper limit.
[0048]
According to the invention of claim 3, the upper limit of the extension distance between the block bodies can be continuously adjusted by the operating screw.
[0049]
According to the fourth aspect of the present invention, the position of the spring in the pipe body can be substantially symmetrically held by the center pin, so that smooth sliding in the cylinder hole of the pipe body is ensured, and the spring is repelled. The force can be fully demonstrated.
[0050]
According to the invention of claim 5, the posture of the spring can be held straight by the spring shaft pin, and in particular, the end of the pipe body when the spring portion protruding from the end face of the pipe body moves into the pipe body. Can be prevented, and smooth expansion and contraction and movement of the spring can be ensured.
[Brief description of the drawings]
FIG. 1 is an overall perspective view showing a first embodiment of a dilator according to the present invention.
FIG. 2 is a plan view showing a block body of a first embodiment of the dilator of the present invention.
FIG. 3 is a side cross-sectional view shown in the direction of arrows CC in FIG. 2;
FIG. 4 is an exemplary front sectional view taken along the line DD in FIG. 2;
FIG. 5 is a front sectional view taken along the line EE in FIG. 2;
FIG. 6 is a plan view showing a spring and a shaft pin of the first embodiment of the dilator of the present invention.
FIG. 7 is a plan view showing a pipe body of the first embodiment of the dilator according to the present invention.
FIG. 8 is a plan view showing a half of the dilator according to the first embodiment of the present invention in a cutaway manner.
FIG. 9 is a side sectional view taken along the line FF in FIG. 8;
FIG. 10 is an explanatory diagram showing an example of a stepwise adjustment method of an expansion upper limit in the first embodiment of the expansion device of the present invention.
FIG. 11 is a plan view showing another example of a pipe body, a spring, and a shaft pin.
FIG. 12 is a plan sectional view showing a second embodiment of the dilator according to the present invention.
FIG. 13 is an explanatory diagram of a removable floor straightening device.
FIG. 14 is an explanatory view of a removable floor straightening device.
FIG. 15 is an explanatory view showing a conventional screw type expander in a contracted state.
FIG. 16 is an explanatory view showing a conventional screw type dilator when it is extended.
FIG. 17 is an overall perspective view showing a conventional spring-type dilator.
FIG. 18 is a plan sectional view showing a conventional spring-type dilator.
[Explanation of symbols]
Resin floor 2; Dentition 3a, 3b; Molar teeth 4a, 4b; Molar teeth 5a, 5b; Clasps 6a, 6b; Clasp 7; Dilator 8; Resin floor 8a; Dividing part 9; Molar teeth 9a; Front teeth 9b; rear teeth 10a, 10b; clasps 11a, 11b; clasps 12; pressure transmitting nuts 13; pressure transmitting nuts 14; operating screws 15; operating portions 16; guide rods 25; connecting arms 26; cylinders 27; connecting arms 28; Piston rod 29; Interior spring 31; Block body 32; Cylinder hole 33; End face 34; Shaft hole 35; Long hole 36; Notch 41; Connecting rod 42; Pin hole 43; Stopper pin 44; 46; nut 51; pipe body 52; center hole 53; center pin 54; Spring 56; spring shaft pin 57; outer flange piece

Claims (5)

At least one pair of left and right blocks (31) is formed on each of the blocks (31) from opposing end faces (33) of the pair of left and right blocks (31) connected to each other by a connecting rod (41) so as to be relatively movable in the left and right directions. At least a pair of pipe bodies (51) are inserted into the cylinder hole (32), and are slidably housed by projecting coil-shaped spring bodies (55) for exhibiting elasticity into the cylinder holes (32) at both left and right ends. A stopper mechanism that is movably assembled and that adjustably determines the upper limit of the expansion distance between the pair of block bodies (31) by the elasticity of a spring (55) along the connecting rod (41). A floor expansion in a removable floor straightening device, wherein a part is provided between a rod (41) and a block body (31), and a part of the pair of block bodies (31) is embedded and fixed in a resin, respectively. vessel. A predetermined number of pin holes (42) into which stopper pins (43) are removably fitted are formed at predetermined intervals in a row on the left and right from the upper part of the side peripheral surface of the cylindrical connecting rod (41). ), A shaft hole (34) through which the connecting rod (41) is slidably inserted, and a part of the shaft hole (34) is opened upward from the upper surface. An oval long hole (35) is formed, the connecting rod (41) is assembled to a shaft hole (34) of the block body (31), and a predetermined hole is formed through the long hole (35). 2. The removable type according to claim 1, wherein a stopper mechanism is formed by locking a stopper pin (43) inserted into the pin hole (42) and the elongated hole (35), and the pair of block bodies (31) are connected. 3. Floor dilator in floor straightening device. The connecting rod (41) is an operating screw (44) in which an operating portion (45) is provided in the center portion and the way of threading is reversed on the left and right, and the cross-sectional shape is an elliptical shape from the upper surface of the pair of block bodies (31). And a shaft hole (34) penetrating from the opposite end surface (33) to the side surface of the long hole (35) and through which the connecting rod (41) is slidably inserted. The connecting rod (41) is assembled to the shaft hole (34), and the nut (46) screwed to the left and right ends of the connecting rod (41) and the long hole (35) are locked. The floor expander of the removable floor straightening device according to claim 1, wherein the pair of block bodies (31) are connected to each other to form a stopper mechanism. A center hole (52) penetrating the body of the pipe body (51) is formed from the upper part of the longitudinal center of the side peripheral surface of the pipe body (51), and the spring (55) is housed symmetrically in the left-right direction. The floor expander according to claim 1, 2 or 3, wherein a center pin (53) is inserted into the center hole (52). The spring shaft pin (56) is configured to be slidably fitted inside the spring (55) from both ends thereof with an outer flange peripheral piece (57) provided at the end as a fitting limit. The floor expander in the removable floor straightening device according to 3 or 4.

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