JP2008006271A - Dental impression separation device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dental impression separation device capable of facilitating the separation of a dental impression from a dental model and preventing the breaking of the dental model when separating them. <P>SOLUTION: This separation device is provided with a tray fixing member 1 fixing an impression tray T for storing the dental impression, a plaster fixing member fixing a plaster Pl attached to the dental impression stored in the impression tray T, and separation screws 17 and 19 separating the dental impression stored in the tray fixing member 1 and the plaster Pl fixed to the plaster fixing member along the erecting direction of teeth formed in the plaster Pl. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a dental impression separating device for separating a dental impression and a plaster.

  Conventionally, when a dental technician forms a plaster model of a dental impression collected from a patient by a dentist, first, the plaster is poured into a dental impression, for example, formed of silicon, stored in an impression tray. Then, after the gypsum hardens, the patient's dental model formed by the gypsum is separated from the dental impression. And as a method of separating the dental model formed from gypsum and the dental impression, the dental model is held by one hand and the dental impression or the impression containing the dental impression is held by the other hand. A technique is used in which a tray is pressed and separated by arm strength. However, due to the fact that the dental model and the dental impression are in close contact with each other, when trying to separate the dental model from the dental impression by arm force, considerable arm force is required, and these must be separated. There was a problem that was difficult. In addition, when trying to separate them by arm force, there is a problem that an excessive load is applied to the dental impression and the teeth formed on the tooth model are damaged.

  As a gypsum extraction device for solving such problems, there is a device described in Patent Document 1.

JP-A-2-299650

  Specifically, this Patent Document 1 discloses an upper flask for storing a dental impression, a cut formed in the upper flask, a locking piece inserted into the cut, a lower flask for storing gypsum, and the lower flask. A gypsum removal device is described which comprises means for fixing the flask. And the gypsum removal device is a dental housed in the upper flask by inserting the locking piece into the notch with the upper flask and the lower flask overlapping, and moving the locking piece in the vertical direction using a screw etc. The impression is to be separated from the gypsum contained in the lower flask.

  By the way, when the gypsum removal apparatus as described above is used, the upper flask can be moved only in the vertical direction in the apparatus, and the dental model may be damaged depending on the shape of the dental model formed by the gypsum. There was a problem that. Although the dental mold shown by the dental impression is different for each patient, when the gypsum extraction device is used, the upper flask and the lower flask cannot be separated according to the dental mold. In particular, the dental impression or the dental model is separated vertically in the dental model where a thin tooth is formed or where the silicon forming the dental impression has wrapped around the lower part of the tooth. By doing so, it is easy to break.

  Therefore, the present invention has been made in view of such circumstances, and can easily separate the dental impression from the dental model and prevent the dental model from being damaged during the separation. It is an object of the present invention to provide a dental impression separation device that can be used.

  In order to solve the above problems, a dental impression separation device according to the present invention is attached to a tray fixing means for fixing an impression tray for storing a dental impression, and to the dental impression stored in the impression tray. Separating gypsum fixing means for fixing gypsum, the dental impression stored in the tray fixing means, and the gypsum fixed to the gypsum fixing means along the direction in which teeth formed on the gypsum are planted And separating means.

  According to this configuration, the dental impression separating device can separate the gypsum fixed to the gypsum fixing means by the separating means and the dental impression along the direction of tooth setting formed in the gypsum. I can do it. And it can prevent a tooth | gear being damaged during isolation | separation work by making the direction which isolate | separates gypsum and a dental impression into a direction along the tooth planting direction by a isolation | separation means. Moreover, since the gypsum and the dental impression can be separated by the separating means, they can be easily separated without using arm force.

  As described above, according to the present invention, the dental impression and the dental model can be easily separated, and the dental model can be prevented from being damaged during the separation.

  Hereinafter, specific embodiments to which the present invention is applied will be described in detail with reference to the drawings.

  The separation device according to the embodiment of the present invention separates, for example, a dental impression collected by a dentist and formed with a dental mold of a patient, and a dental model formed with plaster using the dental impression as a mold. To do. Then, when performing the separation work, the user rotates the screws formed at a plurality of locations little by little while examining the tooth setting direction to separate the dental impression from the dental model. It can be prevented from being damaged.

  As shown in FIG. 1, the separation device includes a tray fixing base 1 for fixing an impression tray. The tray fixing base 1 includes a pedestal 3 having a substantially U-shaped plane and a tray fixing portion 5 that supports the impression tray.

  The pedestal 3 has a substantially U-shape, like a row of teeth formed by a dental model. Although details will be described later, when the impression tray is fixed by the tray fixing base 1, both of the U-shape formed by the teeth of the dental model and the substantially U-shape formed by the base 3 are the same. They are arranged so as to face the direction and so that their centerlines overlap.

  Such a tray fixing base 1 fixes an impression tray T as shown in FIG. As shown in the figure, the impression tray T is a commonly used impression tray, and an impression tray in which a U-shaped tray in which an impression material such as silicon is stuffed is formed at the tip of the handle. It is a tray. For the convenience of explanation, the dental model plaster Pl has already been poured onto the impression material (not shown) provided on the impression tray T, has hardened, and the plaster Pl has adhered to the dental impression. And

  A handle insertion hole 6 for inserting a handle portion of the impression tray T is formed in the base 3 of the tray fixing base 1. The handle portion inserted into the handle insertion hole 6 is pressed against the surface of the base 3 by closing the handle fixing screws 7 a and 7 b, and the impression tray T is fixed on the base 3.

  As shown in FIG. 3, the separation device includes a gypsum fixing member 8 that fixes gypsum Pl that forms a dental model. The gypsum fixing member 8 fixes the gypsum Pl so that the gypsum Pl does not move together with the impression tray T and the dental impression when performing the separation operation. As a specific fixing method, it is preferable that the gypsum fixing member 8 fixes the gypsum Pl by applying a force in a direction substantially perpendicular to the separation direction by the separation device. Such a gypsum fixing member 8 includes a base 9 on which the gypsum Pl is placed and gypsum fixing portions 11a, 11b, and 11c formed on the base 9.

  The gypsum fixing portions 11a, 11b, and 11c fix the gypsum Pl on the base 9 so that the gypsum Pl does not leave the base 9 during the separation operation. Specifically, the gypsum fixing portions 11a, 11b, and 11c apply pressure to the gypsum Pl from around the gypsum Pl. Such gypsum fixing parts 11a, 11b, and 11c are arranged at a predetermined interval on the upper surface of the base 9 having a substantially circular shape, for example. More specifically, the gypsum fixing part 11 c is formed on an arbitrary center line of the base 9. Moreover, the gypsum fixing | fixed part 11a, 11b is formed in the line symmetrical position via this centerline. The gypsum fixing portions 11 a and 11 b include gypsum fixing pins 13 a and 13 b that protrude toward the center of the base 9.

  The gypsum fixing pins 13 a and 13 b come into contact with a part of the gypsum Pl when the gypsum Pl is placed on the base 9. Specifically, the gypsum fixing pins 13a and 13b have a sharp shape so that the tip portion can be bitten into a part of the gypsum Pl.

  The gypsum fixing part 11c has a gypsum fixing screw 15 inserted through a screw hole formed at the center. The gypsum fixing screw 15 has a sharp shape so that the tip thereof can bite into the gypsum Pl. The sharp tip of the gypsum fixing screw 15 and the sharp tip of the gypsum fixing pins 13a and 13b are preferably formed in the same plane. Thereby, when gypsum Pl is fixed by the gypsum fixing pins 13a and 13b and the gypsum fixing screw 15, a moment is hardly generated with respect to the gypsum Pl, and the gypsum Pl can be fixed stably. The gypsum fixing screw 15 is inserted into a screw hole formed in the gypsum fixing portion 11c and rotated in a predetermined direction by the user toward the center portion of the base 9 or on the outside of the base 9. Move towards. In the separation device, gypsum Pl placed on the base 9 is fixed by the gypsum fixing pins 13 a and 13 b and the gypsum fixing screw 15. Specifically, when gypsum Pl is fixed on the base 9, a part of gypsum Pl, preferably a surplus portion of gypsum, which becomes the base of the model, is brought into contact with the gypsum fixing pins 13 a and 13 b and then gypsum fixing. The tip of the screw 15 is moved toward the center of the base 9 while rotating. When the gypsum fixing screw 15 comes into contact with the gypsum Pl, the gypsum Pl is pushed in the direction of the gypsum fixing pins 13a and 13b by the gypsum fixing screw 15. The gypsum Pl placed on the base 9 is fixed on the base 9 by the gypsum fixing pins 13 a and 13 b and the gypsum fixing screw 15.

  The gypsum fixing member 8 includes a plurality of separation screws 17, 19, 21 as separation means and screw fixing portions 23, 25, 27 through which the separation screws 17, 19, 21 are inserted. The screw fixing portions 23, 25, 27 are formed along the outer periphery of the base 9. The screw fixing portions 23, 25, 27 correspond to the separation screws 17, 19, 21 inside near the center of the screw fixing portions 23, 25, 27. The screw holes 29, 31, 33 are formed with screw threads.

  The screw holes 29, 31, 33 are formed from the upper surface of the base 9 in a direction substantially perpendicular to the surface. Further, the separation screws 17, 19, and 21 are inserted into the screw holes 29, 31, and 33 from the bottom surface direction to the top surface direction of the base 9. Then, the user rotates the handle member 35 of each separation screw 17, 19, 21 in a predetermined direction so that the tips of the separation screws 17, 19, 21 are directed in a direction perpendicular to the upper surface of the base 9. Move gradually.

  The distal ends of the separating screws 17, 19, 21 inserted through the screw holes 29, 31, 33 contact the lower surface of the base 3 of the tray fixing base 1. As described above, when the user rotates the handle member 35 in a predetermined direction, the distal ends of the separation screws 17, 19, and 21 are moved upward, and the lower surface of the base 3 is pushed upward.

  Such a separating apparatus fixes the impression tray to which the gypsum Pl is adhered by a method as shown in FIG. Specifically, first, the user places the impression tray T on which the plaster Pl is adhered on the base 9. Next, the user presses the gypsum fixing pins 13a and 13b against the base portion of the gypsum Pl attached to the impression tray T where the tooth pattern is not formed. Next, the user rotates the gypsum fixing screw 15 in a predetermined direction so that the tip of the gypsum fixing screw 15 has a base portion on which the tooth pattern of the gypsum Pl attached to the impression tray T is not formed. The gypsum Pl and the impression tray T to which the gypsum Pl adheres are fixed so as to be pushed in the direction of the gypsum fixing pins 13a and 13b. Next, the user arranges the tray for fixing the impression tray T so that the handle portion of the impression tray T is inserted into the handle insertion hole 6. At this time, the tray fixing base 1 needs to be arranged so that the lower surface of the base 3 is positioned on the extension line of the separating screws 17, 19, 21. Next, the user moves the handle fixing screws 7 a and 7 b downward, and moves the impression tray T to the tray fixing base 1 so that the front end presses the handle portion of the impression tray T against the upper surface of the base 3. Fix it. When the separating apparatus is integrally configured as described above, the AA ′ cross section shown in FIG. 5 becomes a cross section as shown in FIG.

  Next, the user individually rotates the separation screws 17, 19, and 21 while taking into account the planting direction of the teeth formed by the plaster Pl. For example, when the separation screw 21 is rotated and the separation screw 21 is moved upward, the tip of the separation screw 21 pushes up the base 3. At this time, only a portion of the pedestal 3 that is in contact with the separation screw 21 is pushed up, so that the pedestal 3 is given a predetermined inclination. Then, when a predetermined inclination is given to the pedestal 3, the dental impression and the plaster Pl adhere due to the handle portion of the impression tray T being fixed to the pedestal 3 by the handle fixing screws 7a and 7b. Of the portions that are being used, the portions that are close to the separation screw 21 are lifted upward. Then, the user can separate the dental impression from the plaster Pl by individually rotating the separation screws 17, 19, and 21 while considering the tooth setting direction. In this case, considering the planting direction of the front teeth in particular, after the pedestal 3 is pushed up using the separation screw 19 formed on the front surface of the separation device, the separation screws 17 and 21 formed on the side surface of the separation device. It is preferable to perform the separation work in the order of pushing up the pedestal 3 using the.

  As described above, according to the separation device according to the first embodiment, the separation screws 17, 19, and 21 are generated in the axial direction by rotating the separation screws 17, 19, and 21 without depending on the arm force. The dental impression and the dental model made of gypsum can be easily separated using the pressing force. In addition, since the separation device includes a plurality of separation screws 17, 19, and 21, the dental impression can be tilted in various directions. In the separating apparatus, since the separating screws 17, 19, and 21 are individually rotated little by little, the separating operation can be performed in consideration of the tooth setting direction. It is possible to prevent the model from being damaged.

  In addition, according to the separation apparatus according to the first embodiment, the impression tray T and the base portion on which the dental mold tooth mold is not formed can be fixed, so that the separation work can be performed. It is possible to prevent the model from being damaged.

  Further, according to the separation apparatus according to the first embodiment, since it is not necessary to perform special processing on the impression tray or the plaster, a special operation is required from the dentist who collects the dental impression. There is no need, and it is possible to use a conventional impression tray as it is.

  Hereinafter, the second embodiment of the present invention will be described in detail.

  As shown in FIG. 6, the separating apparatus according to the second embodiment fixes a tray fixing base 101 for fixing an impression tray T and gypsum Pl attached to a dental impression stored in the impression tray T. Separating means for separating the dental impression stored in the tray fixing base 101 and the gypsum Pl fixed on the plaster fixing base 102 along the planting direction of the tooth model formed on the plaster Separating screws 103a, 103b, and 103c.

  On the tray fixing base 101, an impression tray T is arranged at the time of separating the dental impression and the plaster Pl. The tray fixing base 101 fixes the impression tray T so that the arranged impression tray T does not move during the separation work. Further, the tray fixing base 101 is formed so as to be able to hold the separation screws 103a, 103b, 103c during the separation work. As shown in FIG. 7, such a tray fixing base 101 includes a pedestal 104 on which the impression tray T is arranged, and a screw holding base 105 that holds separation screws 103a, 103b, and 103c as separation means.

  The pedestal 104 has a block shape having a flat upper surface. The upper surface of the pedestal 104 is formed in a substantially trapezoidal shape, and on such a flat upper surface of the pedestal 104, an impression tray T in which gypsum Pl is attached to a dental impression is disposed. At this time, the impression tray T is disposed so that the gypsum Pl is positioned above. The pedestal 104 is preferably formed using a material having a certain strength so that it can withstand the pressure applied from the separation screws 103a, 103b, and 103c during the separation operation. The pedestal 104 preferably has a constant weight so that the entire separation device can be stabilized during the separation operation.

  The screw holding base 105 holds the separation screws 103a, 103b, and 103c during the separation work. Specifically, the screw holding base 105 is formed along three sides of the upper surface of the pedestal 104 formed in a substantially trapezoidal shape, excluding the long side. When the screw holding base 105 is formed along the three sides of the upper surface of the pedestal 104 in this way, the tray fixing base 101 has a shape in which the central portion is recessed. The impression tray T is arranged in the recess formed in the central portion of the tray fixing base 101 as described above.

  In addition, the tray fixing base 101 includes a handle insertion hole 106 for inserting a handle portion of the impression tray T. A handle portion of the impression tray T is inserted into the handle insertion hole 106 when the impression tray T is fixed on the tray fixing base 101. Such a handle insertion hole 106 is formed by penetrating a part of the screw holding base 105 in a direction parallel to the upper surface of the base 104. The handle insertion hole 106 is formed so as to merge with a screw hole 107 formed from above the screw holding base 105. A handle fixing screw 108 is inserted into the screw hole 107 from above. When the handle fixing screw 108 is closed, the tip portion of the handle fixing screw 108 presses the handle portion of the impression tray T against the base 104. As a result, the impression tray T is fixed on the pedestal 104.

  Further, the tray fixing base 101 includes screw receivers 109a, 109b, and 109c that hold the distal ends of the separation screws 103a, 103b, and 103c. The tip ends of the separation screws 103a, 103b, and 103c are arranged on the screw receivers 109a, 109b, and 109c during the separation work. At the time of separation work, a certain pressure is applied to the tray fixing base 101 from the separation screws 103a, 103b, 103c. At this time, the screw receivers 109a, 109b, 109c are connected to the tray fixing base 101 by the separation screws 103a, 103b, 103c. The separation screws 103a, 103b, and 103c are held on the tray fixing base 101 so as not to drop from above. Specifically, the screw receivers 109 a, 109 b, and 109 c are concave portions formed on the upper surface of the screw holding base 105. Each screw receiver 109a, 109b, 109c is formed corresponding to three separation screws 103a, 103b, 103c. Further, the screw receivers 109a, 109b, and 109c are arranged so as to form an isosceles triangle so that the gypsum fixing base 102 is stabilized on the tray fixing base 101. When the separation screws 103a, 103b, and 103c are integrally fixed via the gypsum fixing base 102 and the gypsum fixing base 102 is arranged on the tray fixing base 101, the separation screws 103a, 103b, and 103c protrude from the gypsum fixing base 102 in the same direction. The tips of the plurality of separating screws 103a, 103b, 103c are arranged so as to be fitted in the corresponding screw receivers 109a, 109b, 109c. The diameter of the screw receivers 109a, 109b, and 109c is preferably about 20 mm when the diameter of the separating screws 103a, 103b, and 103c is 5 mm. In this manner, the diameters of the screw receivers 109a, 109b, and 109c are made relatively large relative to the diameters of the screws 103a, 103b, and 103c for separation, so that the screws 103a, 103b, and 103c for separation are screw receivers 109a, 109b, and 109c. It is slidably held inside. The separation screws 103a, 103b, and 103c are slidably held on the tray fixing base 101, so that the gypsum fixing member 102 can be used so that the impression tray T and the gypsum correspond to the tooth setting direction during the separation operation. Therefore, the plaster can be prevented from being damaged.

  Further, the tray fixing base 101 includes fixing portions 110a and 110b for fixing a tray portion for storing a dental impression in the impression tray T. The tray fixing members 110a and 110b fix the impression tray T on the pedestal 104 so that the impression tray T does not move upward during the separation operation. Such tray fixing members 110 a and 110 b are fixed to the pedestal 104 at line-symmetric positions via the center line L of the pedestal 104. Since the tray fixing member 110a and the tray fixing member 110b have the same configuration except for the position where they are fixed, only the tray fixing member 110a will be described in detail below.

  Specifically, the tray fixing member 110a includes a tray fixing screw 111a and an adjustment stay 112a that adjusts the height of the tray fixing screw 111a from the upper surface of the base 104. The tray fixing screw 111a has an axis substantially parallel to the upper surface of the pedestal 104, and moves in a direction substantially parallel to the upper surface of the pedestal 104 by rotating. During the separation operation, the tip of the tray fixing screw 111a is disposed so as to come into contact with, for example, a portion corresponding to the molar tooth of the impression tray T. As a result, the impression tray T is fixed on the tray fixing base 101 in a well-balanced manner at three locations including the handle portion.

  The adjustment stay 112a is formed in a rectangular parallelepiped shape, and includes an elongated bolt hole 113a extending in the axial direction of the adjustment stay 112a and a screw hole 114a through which the tray fixing screw 111a is inserted. The stay 112a for adjustment is fixed to the side surface of the base 104 by inserting the bolt B into the bolt hole 113a. At this time, the adjustment stay 112a is arranged such that the screw hole 114a protrudes upward from the upper surface of the base 104 by a predetermined distance. The distance by which the screw hole 114a protrudes from the upper surface of the pedestal 104 can be adjusted by moving the adjustment stay 112a up and down via the bolt hole 113a. Further, since the adjustment stay 112a is supported so as to be rotatable around the bolt B, the inclination of the adjustment stay 112a can be changed. By using such an adjustment stay 112a, the separation device can freely adjust the height of the tray fixing screw 111a from the top surface of the pedestal and the left and right positions. It becomes possible to deal with trays.

  Further, as shown in FIG. 8, the gypsum fixing base 102 has a base material 115 shaped like a fringe corresponding to the tray fixing base 101, and a base material 115 that extends from the outside to the inside of the base material 115. Gypsum fixing screws 116a, 116b, and 116c are provided in the penetrating direction. The gypsum fixing base 102 includes adjustment stays 117a, 117b, and 117c that hold the gypsum fixing screws 116a, 116b, and 116c. In the separation device, the plaster fixing members 118a, 118b, and 118c are configured by the plaster fixing screws 116a, 116b, and 116c and the adjustment stays 117a, 117b, and 117c, respectively.

  The base material 115 is provided with a bolt hole 119a for fixing the adjusting stay 117a at the approximate center of the long side portion. The adjustment stay 117a has the same configuration as the adjustment stay 112a described above. The adjustment stay 117a is fixed to the base material 115 by inserting the bolt B into the bolt hole 120a. The gypsum fixing screw 116a is inserted into the adjustment stay 117a through the screw hole 121a, and the tip thereof is arranged so as to contact the gypsum Pl arranged in the hollow portion of the base material. The tip of the gypsum fixing screw 116a has a sharp shape and is formed to bite into the gypsum Pl.

  Also, the gypsum fixing screws 116b and 116c are disposed in the vicinity of the corners of the short side and the hypotenuse side of the base material 115 via the adjustment stays 117b and 117c, respectively. In the separation device, the gypsum Pl is supported at three points. Specifically, the gypsum fixing screw 116a supports the gypsum Pl from the back side of the portion corresponding to the front tooth of the gypsum Pl, and the gypsum fixing screws 116b and 116c are respectively from substantially the front of the portion corresponding to the front tooth of the gypsum Pl. Supports gypsum Pl.

  Further, it is preferable that the gypsum fixing screws 116 a, 116 b, and 116 c are formed so that their tip portions are movable in the vertical direction with respect to the gypsum fixing base 102. The gypsum fixing screws 116a, 116b, and 116c are held by the adjusting stays 117a, 117b, and 117c through the screw holes 121a, 121b, and 121c formed in the adjusting stays 117a, 117b, and 117c. At this time, the gypsum fixing screws 116a, 116b, and 116c are supported so as to rotate in the vertical direction with the screw holes 121a, 121b, and 121c as fulcrums. Further, the plaster fixing screws 116a, 116b, 116c are preferably held by the adjustment stays 117a, 117b, 117c so as to form a minute acute angle with respect to the upper surface of the base 104, as shown in FIG. . In other words, the gypsum fixing screws 116a, 116b, and 116c are held so that the tips of the gypsum fixing screws 116a, 116b, and 116c and the upper surface of the base 104 form an acute angle. Is done. The configuration in which the tip portions of the gypsum fixing screws 116a, 116b, and 116c are movable in the vertical direction and the gypsum fixing screws 116a, 116b, and 116c form a minute acute angle with respect to the upper surface of the pedestal 104 is as follows. The diameters of the gypsum fixing screws 116a, 116b, 116c are formed so as to be smaller than the diameters of the screw holes 121a, 121b, 121c, and the angle at which the adjustment stays 117a, 117b, 117c are erected is tilted. This is realized by inclining the angles of the holes 121a, 121b, and 121c or by adjusting in advance the angles at which the screw holes 121a, 121b, and 121c are formed.

  In this way, the gypsum fixing screws 116a, 116b, and 116c are made smaller in diameter than the screw holes 121a, 121b, and 121c so that the gypsum fixing screws 116a, 116b, and 116c can be moved vertically with respect to the gypsum fixing base 102. It becomes possible to move. In this case, for example, if the diameters of the gypsum fixing screws 116a, 116b, and 116c are 5 mm, the diameters of the screw holes 121a, 121b, and 121c are formed to be about 6 mm. As a result, the gypsum fixing screws 116a, 116b, 116c are held by the adjusting stays 117a, 117b, 117c so that the tip portions can move and do not fall off the screw holes 121a, 121b, 121c.

  In addition, by tilting the angle at which the adjustment stays 117a, 117b, and 117c are erected, the angle of the screw holes 121a, 121b, and 121c is tilted, or the angle at which the screw holes 121a, 121b, and 121c are drilled is directed upward in advance. The gypsum fixing screws 116a, 116b, 116c form a fine acute angle with respect to the upper surface of the pedestal.

  According to such a configuration, first, when fixing the gypsum Pl to the gypsum fixing base 102, the gypsum fixing screws 116a, 116b, and 116c bite into the gypsum Pl so that the tip ends face upward. During the separation operation, a downward force is applied to the gypsum Pl. Therefore, the tips of the gypsum fixing screws 116a, 116b, and 116c move downward, and the gypsum fixing screws 116a, 116b, and 116c are screw holes 121a. , 121b, 121c are pivoted downward. When the gypsum fixing screws 116a, 116b, and 116c are rotated downward, the distances between the tips of the gypsum fixing screws 116a, 116b, and 116c are reduced, and the gypsum fixing screws 116a, 116b, and 116c are further tightened. Deeply bites into the plaster Pl, and the plaster Pl is held more firmly.

  When using such a separating apparatus, first, as shown in FIG. 10, the user arranges the impression tray T in a state where the plaster P1 is accommodated on the upper surface of the base 104, and also handles the impression tray T. The handle is inserted into the handle insertion hole 106, and the handle portion of the impression tray T is fixed using the handle fixing screw 108. At this time, the impression tray T is disposed so that the gypsum Pl is positioned above. Next, the user securely fixes the impression tray T on the pedestal 104 using the tray fixing members 110a and 110b. Specifically, the user rotates the tray fixing screws 111a and 111b to bring the tip ends of the tray fixing screws 111a and 111b into contact with the impression tray T. As a result, the impression tray T is fixed to the tray fixing base 101.

  Next, the user places the gypsum fixing base 102 on the tray fixing base 101. At this time, the gypsum fixing base 102 is disposed so that the separating screws 103a, 103b, and 103c are accommodated in the corresponding screw receivers 109a, 109b, and 109c. At this time, the separation screws 103a, 103b, and 103c are in a loosened state, so that the base material 115 of the gypsum fixing base 102 comes close to the screw holding base 105 of the tray fixing base 101. .

  Next, the user rotates the gypsum fixing screws 116a, 116b, and 116c so that the tips of the gypsum fixing screws 116a, 116b, and 116c come into contact with the gypsum Pl. Thereby, the gypsum Pl is fixed to the gypsum fixing base 102.

  Next, as shown in FIG. 11, the user rotates the separating screws 103a, 103b, 103c little by little while considering the planting direction, and puts the dental impression stored in the impression tray T and the plaster Pl. To separate. For example, when the separation screw 103a is rotated, the base material 115 rises along the separation screw 103a. As the base material 115 rises, the gypsum fixing screw 116b fixed to the base material 115 rises, so that the gypsum Pl is lifted upward. At this time, due to the downward force applied to the gypsum Pl, the gypsum fixing screws 116a, 116b, and 116c rotate about the screw holes 121a, 121b, and 121c as fulcrums to hold the gypsum Pl more firmly.

As described above, according to the separation device according to the second embodiment, the separation screws 103a, 103b, 103c are generated in the axial direction by rotating the separation screws 103a, 103b, 103c without depending on the arm force. A dental impression and a dental model made of gypsum can be easily separated using a pressing force. In addition, the separation device includes a plurality of separation screws 103a, 103b, and 103c, and each is formed independently so that the distance between the gypsum fixing base 102 and the tray fixing base 101 can be adjusted. It is possible to tilt the dental impression. In the separating apparatus, since the separating screws 103a, 103b, and 103c are individually rotated little by little, the separating operation can be performed in consideration of the tooth setting direction. It is possible to prevent the model from being damaged.

  Further, according to the separating apparatus according to the second embodiment, the gypsum fixing base can be used even when the gypsum Pl does not rise vertically but rises obliquely due to the shape of the tooth formed in the dental impression during the separating operation. Since the separation screws 103a, 103b, and 103c for supporting 102 are slidably held on the tray fixing base 101, the gypsum fixing base 102 also moves as the gypsum Pl moves in the horizontal direction with respect to the upper surface of the base 104. To do. Thereby, it is possible to prevent the gypsum Pl from being damaged by forcibly raising the gypsum Pl.

  Further, in the above-described embodiment, when the gypsum Pl is fixed, the tips of the gypsum fixing screws 116a, 116b, and 116c are bitten into the gypsum Pl. For example, a dental impression provided by a dentist When the dental plaster is not filled with plaster Pl, a hook such as a hook capable of hooking the tips of the plaster fixing screws 116a, 116b, and 116c is used for plastering the dental impression. It is also possible to embed in In this case, the hooking member is embedded in the surface exposed above the gypsum Pl in correspondence with the gypsum fixing screws 116a, 116b, and 116c. Then, by forming a thread on the embedded portion of the hook member, the hook member can be easily removed after separation of the dental model. Thereby, it can prevent that the bottom part of a dental model is damaged.

  The present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the spirit of the present invention.

  For example, although the separation screws 17, 19, and 21 are used as the separation method by the separation device, any structure that can gradually separate the plaster and the dental impression from a plurality of directions can be used. Various configurations may be used.

  Further, for example, the separation device is configured to include three separation screws 17, 19, and 21, but the number of separation screws 17, 19, and 21 is not limited to three.

  Further, for example, the gypsum fixing member 8 has been described in detail as the gypsum fixing means, but any configuration can be used as the gypsum fixing means as long as the gypsum Pl can be fixed during the separation operation. It may be. Further, although the detailed description has been given using the tray fixing base 1 as the tray fixing means, any shape can be used as the tray fixing means as long as the impression tray T can be fixed during the separation operation. It may be a shape.

  In the separation device, the gypsum fixing portions 11a, 11b, and 11c for inserting the separation screws 17, 19, and 21 into the gypsum fixing member 8 have been described in detail, but the gypsum fixing portions 11a, 11b, 11c is good also as a structure formed in the tray fixing member 1. FIG.

  As a modification of the base 9, the center of the base 9 can be formed in a hollow shape or a recessed shape. Thereby, for example, even when the portion of the plaster Pl that contacts the base 9 is not flat, the plaster Pl can be stably fixed by the plaster fixing member 8.

It is a perspective view which shows the tray fixing member of the separation apparatus which concerns on the 1st Embodiment of this invention, and is a figure for demonstrating the structure of the tray fixing stand. It is a perspective view which shows the tray for impressions fixed by the tray fixing stand. It is a perspective view which shows the gypsum fixing member of the separation apparatus, and is a figure for demonstrating the structure of the gypsum fixing member. It is a perspective view which shows the state of the separation apparatus at the time of performing a separation operation by the separation apparatus. It is sectional drawing of an AA 'cross section at the time of performing a separation operation | work with the separation apparatus. It is a perspective view of the separation device concerning a 2nd embodiment of the present invention, and is a figure for explaining the composition of the separation device. It is a perspective view which shows the tray fixing stand of the separation apparatus, and is a figure for demonstrating the structure of the tray fixing stand. It is a perspective view which shows the gypsum fixing base of the separation apparatus, and is a figure for demonstrating the structure of the gypsum fixing base. It is sectional drawing which shows the outline of the state which fixed the gypsum using the same gypsum fixing stand. It is sectional drawing which shows the state of the separation apparatus at the time of performing a separation operation by the separation apparatus. It is sectional drawing which shows the state of the separation apparatus at the time of performing a separation operation by the separation apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tray fixing base 3 Base 5 Tray fixing part 6 Handle insertion hole 7a, 7b Handle fixing screw 8 Gypsum fixing member 9 Base 11a, 11b, 11c Gypsum fixing part 13a, 13b Gypsum fixing pin 15 Gypsum fixing screw 17, 19 , 21 Separation screw 21 Separation screw 23, 25, 27 Screw fixing part 29, 31, 33 Screw hole 35 Handle member 101 Tray fixing base 102 Gypsum fixing base 103a, 103b, 103c Separation screw 104 Base 105 Screw holding base 106 Handle insertion hole 107 Screw hole 108 Handle fixing screw 109a, 109b, 109c Screw receiver 110a, 110b Tray fixing member 111a, 111b Tray fixing screw 112a Adjusting stay 113a Bolt hole 114a Screw hole 115 Base material 116a, 116b, 116c Gypsum Fixing screws 117a, 117b, 117c Sei stays 118a, 118b, 118c plaster fixing member 119a, 119b, 119c bolt holes Pl plaster T impression tray

Claims (5)

Tray fixing means for fixing an impression tray for storing a dental impression;
Gypsum fixing means for fixing gypsum adhering to the dental impression stored in the impression tray;
Separating means for separating the dental impression housed in the tray fixing means and the gypsum fixed to the gypsum fixing means along a direction in which teeth are formed in the gypsum,
A dental impression separator characterized by the following. The separating means is a screw member supported by at least one of the tray fixing means or the gypsum fixing means,
The screw member is formed so as to be able to separate the tray fixing means and the plaster fixing means by rotating;
The dental impression separation device according to claim 1. The separating means comprises at least three screw members;
The dental impression separation device according to claim 2, wherein: The tray fixing means is configured to fix a handle portion of the impression tray;
The dental impression separation device according to claim 1, wherein the dental impression separation device is a dental impression separation device. The gypsum fixing means is configured to fix the gypsum substantially perpendicular to the separating direction by the separating means;
The dental impression separation device according to any one of claims 1 to 4, characterized in that: