JP4704244B2 - Dental prosthesis block holder - Google Patents

Description

  The present invention relates to a cutting / grinding machine using a CAD / CAM system for a dental prosthesis mounted in a cavity, crowned by an abutment tooth, or mounted on a tooth surface from a dental prosthesis block. The present invention relates to a block holder for a dental prosthesis that is used when being manufactured by cutting and grinding using the above method.

  In recent years, as a method for stably supplying dental prostheses such as inlays mounted in cavities, crowns covered by abutments, bridges, and laminate veneers mounted on the surface of teeth in a short time with a constant quality The dental prosthesis is designed on the screen using a computer, and the dental prosthesis block is cut and ground by a cutting / grinding machine using a CAD / CAM system based on the design data. 2. Description of the Related Art A method for producing a prosthesis for use has been put into practical use and attracted attention as represented by, for example, a SEREC system (system of Siemens, Germany).

  In such a CAD / CAM system in dentistry, first, an impression is taken of a patient's oral shape (dental shape or dentition shape) using a dental impression material, and a plaster model is prepared from this impression. Depending on the gypsum model, a wax model is further prepared, and the three-dimensional coordinate information of the gypsum model or the wax model is measured using a laser measuring instrument, and the dentition shape on the gypsum model side and the opposite tooth side. The three-dimensional coordinate information with the dentition shape is also measured.

  Next, the dental prosthesis is designed by a computer based on the obtained measurement data. This design includes a design operation for determining the margin line of the dental prosthesis, and a design operation for the shape of the surface facing the tooth. And the design operation of the shape of the surface exposed in the oral cavity.

  Thus, when the design of the target dental prosthesis is completed, the dental prosthesis such as a cured resin body, a ceramic sintered body, and a metal body mounted on an automatic cutting / grinding machine of the CAD / CAM system based on the design data. The objective dental prosthesis is produced by automatically cutting and grinding the dental block.

  For the preparation of this dental prosthetic block, a dental prosthetic block is bonded to one end of a shaft that can be mounted so as not to rotate in a mounting hole provided in an automatic cutting / grinding machine of a CAD / CAM system. A fixture that is fixed by means such as an agent has been used (see, for example, Patent Document 1 and Patent Document 2).

  However, the dental prosthesis block is automatically cut and ground by attaching a fixture with such a dental prosthesis block fixed to one end of the shaft to the automatic cutting and grinding machine of the CAD / CAM system. When the target dental prosthesis is manufactured, the dental prosthesis block that has been automatically cut and ground into the desired dental prosthesis shape can be easily placed between the fixture and the fixture. Therefore, the dental prosthesis block finished in the shape of the target dental prosthesis is cantilevered via the thin connection part. This thin connection part vibrates due to the pressing force of the cutting bar or grinding bar of an automatic cutting / grinding machine, etc., so that it can be automatically cut / ground without being damaged or damaged. Cutting of dental prosthesis Phenomenon to lower the cutting machining accuracy has occurred.

Japanese Patent Publication No. 7-28878 JP 2000-287997 A

  Therefore, the present invention provides a fixture to be mounted on an automatic cutting / grinding machine of a CAD / CAM system when a dental prosthesis is manufactured by a cutting / grinding machine using a CAD / CAM system. The thin connecting portion existing between the dental prosthesis block may be damaged by vibration, or the cutting and grinding accuracy of the dental prosthetic block may be reduced due to the vibration of the thin connecting portion. It is an object to provide a block holder for a dental prosthesis that does not exist.

As a result of intensive studies to solve the above-mentioned problems, the present inventors have made a thin connection between a fixture mounted on an automatic cutting / grinding machine of a CAD / CAM system and a dental prosthesis block after completion of processing. Therefore, in order to prevent vibration due to the presence of the thin connecting portion, the dental prosthesis block is cut and ground by a cutting / grinding machine using a CAD / CAM system. A dental prosthesis block holder for producing a dental prosthesis by grinding, a holding part for holding the dental prosthesis block on at least two surfaces via a cushioning material, and this holding part The structure is equipped with a fixed part that is finally integrated and mounted on a cutting / grinding machine, and two thin connecting parts between the dental prosthesis block after the processing and the fixing tool In a state that has Than is the present invention has been completed by investigating that may be Re.

In the dental prosthesis block holder having such a structure, there is an aspect in which the holding portion includes an engaging portion that holds the upper surface and the lower surface of the dental prosthesis block, respectively. engagement portion of the holding portion in the case is preferably a engaging portion for holding respectively engaged with the projecting portion projecting from the upper and lower surfaces of the dental prosthesis block, the holding portion engaging portion, or a engaging portion for holding respectively engaged to the protrusion portion Ru der of the material constituting the dental prosthesis block, the engagement portion of the holder, the dental prosthesis preference is that the or a engaging portion for holding each engaged with the protrusion and the material constituting the use blocks that are separately secured to the upper and lower surfaces of a different material and is and dental prosthesis block .

Further, in a case made of suitable plate-shaped member for a dental prosthesis block to produce a dental prosthesis, such as laminate veneer, the holding portion by pinching both sides of the block for a dental prosthesis respectively held In this embodiment, the holding member of the holding portion is fixed to the fixing portion and the dental prosthesis block is held and held. A fixed holding member that is fixed to a fixed holding member that is arranged opposite to the fixed holding member, or is fixed to a fixing member having a shape in which the fixing portion is divided in the axial direction. , and the result or be one and the fixing member and the fixing clamping member forms a fixing portion holding part when it is integrated to hold by pinching blocks dental dental prosthesis at the same time Is preferred .

The dental prosthesis block holder according to the present invention includes a holding part for holding a dental prosthesis block on at least two surfaces via a cushioning material, and a cutting part that is integrated integrally with the holding part. Since it has a structure equipped with a fixed part to be attached to the grinding machine, it is between the fixed part to be attached to the automatic cutting / grinding machine of the CAD / CAM system and the block for dental prosthesis after completion of processing. since the thin connecting portion exists Ri Do to two or more, and the vibration caused by the thin connecting portion because held through the cushioning material is prevented, during the dental prosthesis block after machining end Thus, there is no possibility that the thin connecting portion existing in the case will be damaged by vibration, or the cutting and grinding accuracy of the dental prosthesis block will not be lowered due to the vibration of the thin connecting portion.

And as a holding | maintenance part which hold | maintains the block for dental prosthetics via a shock absorbing material in at least 2 surfaces in this way, it engages and hold | maintains on the upper surface and lower surface of a block for dental prosthesis, respectively. parts exist embodiment comprises a engagement portion of the holding portion in the case of this embodiment are respectively held engaged with the projecting portion projecting from the upper and lower surfaces of the dental prosthesis block it is preferably the engagement portion, the engagement portion of the holding portion, even engaging portion for holding respectively engaged to the protrusion portion Ru der of the material constituting the dental prosthesis block , engagement portion of the holding portion, respectively engaged with the projecting portion and the material constituting the dental prosthesis for blocks that are separately secured to the upper and lower surfaces of a different material and is and dental prosthesis block may be engaging portion for holding Te, but the protrusion dental prosthesis If it is a part of the material that constitutes the block, the position of the upper and lower protrusions can be determined by making a block for a dental prosthesis at once by using the same material with the protrusions protruding on the upper and lower surfaces. Since it can be used as an accurate dental prosthesis block, a protrusion is made of a material different from the material constituting the dental prosthesis block, and the protrusion is made of an adhesive or the like to form a protrusion. Compared to the case of fixing to the two, it is preferable that the positions of the two protrusions can be formed and held accurately .

Further, in a case made of suitable plate-shaped member for a dental prosthesis block to produce a dental prosthesis, such as laminate veneer, the holding portion by pinching both sides of the block for a dental prosthesis respectively held However, in this case, the holding member of the holding portion is fixed to the fixing portion and the dental prosthesis block is held and held. A movable holding member that is disposed and fixed opposite to the fixed holding member, or a holding member in which the holding member is fixed to a fixing member having a shape in which the fixing portion is divided into two in the axial direction. It is a member, and when the fixing member and the fixing holding member are integrated so as to hold and hold the dental prosthesis block, the holding portion and the fixing portion are formed at the same time. A plate-like part The holding portion when preparing only the blocks for a dental prosthesis and the fixed part consisting of at Preferred because it again and again reused.

Hereinafter, a block holder for a dental prosthesis according to the present invention will be described in detail with reference to the drawings.
FIG. 1 shows a dental prosthesis block holder according to an embodiment of a dental prosthesis block holder according to the present invention and a dental prosthesis block held by the dental prosthesis block holder. FIG. 2 is a perspective explanatory view showing a state before assembly, and FIG. 2 is a dental view comprising a plate-like member held by a block holder for a dental prosthesis having the same structure as the block holder for a dental prosthesis shown in FIG. FIG. 3 is a perspective view showing an example of a dental prosthesis block. FIG. 3 shows an embodiment of a dental prosthesis block holder when the dental prosthesis block is made of a plate-like member, and the dental prosthesis block. FIG. 4 is a perspective explanatory view showing the dental prosthesis block held by the holder in a state before assembling the dental prosthesis block holder. FIG. 4 shows a case where the dental prosthesis block is made of a plate-like member. Other embodiments of block holders for dental prostheses and FIG. 5 is a perspective explanatory view showing the dental prosthesis block held by the dental prosthesis block holder in the state before the dental prosthesis block holder is assembled, and FIG. 5 is a block for the dental prosthesis. Is a perspective view showing the shape of the dental prosthesis block after the end of processing when the dental prosthesis processed by the automatic cutting / grinding machine of the CAD / CAM system is a laminate veneer. FIG.

The block holder for a dental prosthesis according to the present invention is for cutting and grinding the dental prosthesis block 2 by a cutting / grinding machine using a CAD / CAM system to produce a dental prosthesis. A dental prosthesis block holder, a holding part 3 for holding a dental prosthesis block 2 on at least two surfaces via a cushioning material 4, and finally integrated with the holding part 3 And a fixed portion 1 mounted on a cutting / grinding machine.

  Here, the fixing portion 1 serves to attach the dental prosthesis block 2 to a cutting / grinding position on a cutting / grinding machine using a CAD / CAM system. It is composed of a shaft provided with a rotation restricting portion such as a keyway for restricting the mounting direction to an accurate direction and preventing rotation, and the illustrated embodiment is a round bar. A part of the lower end of the shaft is formed into an obliquely cut shape that serves as a rotation restricting portion.

And the holding | maintenance part 3 is equipped with the engaging parts 3a and 3a each engaged and hold | maintained to the upper surface and lower surface of the block 2 for dental prostheses as shown in FIG. 1, and FIG.3 and FIG.4. clamping members 3b of the dental prosthesis block 2 is held by pinching each on both sides of the dental prosthesis block 2 when a plate-like member as shown, and a case that includes a 3b.

When the holding portion 3 includes the engaging portions 3a and 3a for engaging and holding the upper surface and the lower surface of the dental prosthesis block 2, respectively, the engaging portions 3a and 3a of the holding portion 3 are provided. As shown in FIGS. 1 and 2, it is preferable that the engaging portions are engaged with and held by projecting portions 2a and 2a projecting from the upper surface and the lower surface of the dental prosthesis block 2 , respectively . When the protrusions 2a and 2a are engaged and held by the engaging portions 3a and 3a of the holding portion 3, the dental prosthetic block 2 is held in the correct direction with respect to the holding portion 3, respectively. rotation regulating portion for preventing rotation is must those that provided with regulating, a part of the end of the shaft consisting of a round rod as a rotation restricting portion in the embodiment shown in FIG. 1 It has a shape cut obliquely, and in the embodiment shown in FIG. 2, it has a prismatic shape.

  In this way, when the holding portion 3 includes the engaging portions 3a and 3a for engaging and holding the upper surface and the lower surface of the dental prosthesis block 2, respectively, as a dental prosthesis block holder, As shown in FIG. 1, a lower engaging portion 3a fixed to a fixing portion 1 and engaged with and held by a lower protruding portion 2a of a dental prosthesis block 2 is detachable from the lower engaging portion 3a. The upper protrusion 2a of the dental prosthesis block 2 is engaged with and held by an upper engagement part 3a. The upper and lower protrusions 2a, 2a of the dental prosthesis block 2 are engaged with each other. A block holder for a dental prosthesis in which both the engaging portions 3a and 3a are integrally fixed by a fixing means such as a bolt and a nut while being engaged with and held by the portions 3a and 3a can be preferably used.

Protrusions projecting from the upper and lower surfaces of the dental prosthesis block 2 that are held in engagement with the engaging portions 3a and 3a of the holder 3 of the dental prosthesis block holder. 2a, 2a is a material different from the material constituting the dental prosthesis block 2 as shown in FIG. 1 and the material constituting the dental prosthesis block 2 as shown in FIG. For example, it may be a metal material and separately fixed to the upper and lower surfaces of the dental prosthesis block 2, but if it is part of the material constituting the dental prosthesis block 2, the upper and lower surfaces Dental prosthesis block 2 in which the positions of the upper and lower projections 2a, 2a are accurate by producing the dental prosthesis block 2 at once with the same material in a state where the projections 2a, 2a are projected. Therefore, it is a material different from the material constituting the dental prosthesis block 2 Compared with the dental prosthesis block 2 in which the protrusions 2a, 2a are produced and fixed with an adhesive or the like, the positions of the two protrusions 2a, 2a are accurately formed and held . Is preferable.

And this holding | maintenance part 3 needs to be a holding | maintenance part provided with the engaging parts 3a and 3a which engage and hold | maintain the upper surface and lower surface of the block 2 for dental prostheses through the buffer material 4, respectively. As the buffer material 4, for example, various rubber materials and impact absorbing gel compositions as disclosed in Japanese Patent No. 299397 can be preferably used.

Further, when the dental prosthesis block 2 is made of a suitable plate-shaped member for making a dental prosthesis, such as laminate veneer, the holding portion 3 on both sides of the dental prosthesis for block 2, respectively pinching In this case, the holding members 3b and 3b of the holding part 3 are preferably provided with a fixed holding member 3ba fixed to the fixing part 1 as shown in FIG. 4 is a movable clamping member 3bb which is disposed and fixed so as to be opposed to the fixed clamping member 3ba so as to clamp and hold the prosthetic block 2 for holding, and as shown in FIG. The fixing members 1a and 1ba are fixed to the fixing members 1a and 1a, which are divided in half, respectively. The fixing members 1a and 1a and the fixing holding members 3ba and 3ba which are divided in the axial direction are dental To hold and hold the dental prosthetic block 2 There exists an aspect which forms simultaneously the holding | maintenance part 3 and the fixing | fixed part 1 when it integrates by screwing a nut like the Example shown.
In any of these embodiments, the dental prosthesis block 2 is held and held by the holding members 3b and 3b of the holding unit 3 and the dental prosthesis is obtained by a cutting / grinding machine using a CAD / CAM system. When the laminate veneer is cut and ground, a laminate veneer as shown in FIG. 5 can be produced satisfactorily.

Even when the dental prosthesis block 2 is made of a plate-like member and the holding part 3 is provided with holding members 3b and 3b for holding the dental prosthesis block 2 from both sides, the holding part 3 is also provided. Needs to be a holding portion provided with holding members 3b, 3b for holding the dental prosthesis block 2 via the cushioning material 4. Examples of the cushioning material 4 include various rubber materials and disclosed in Japanese Patent No. 2999397. The shock-absorbing gel composition as described above can be preferably used.

Before assembling the block holder for a dental prosthesis, one embodiment of the block holder for a dental prosthesis according to the present invention and the block for a dental prosthesis held by the block holder for a dental prosthesis are assembled. It is a perspective explanatory view shown in the state. It is a perspective view which shows an example of the block for dental prostheses which consists of a plate-shaped member hold | maintained at the block holder for dental prosthesis of the same structure as the block holder for dental prosthesis shown in FIG. . One embodiment of a dental prosthesis block holder when the dental prosthesis block is formed of a plate-like member and a dental prosthesis block held by the dental prosthesis block holder It is a perspective explanatory view shown in the state before assembling the block holder for prosthesis. Another embodiment of a dental prosthesis block holder when the dental prosthesis block is composed of a plate-like member and a dental prosthesis block held by the dental prosthesis block holder It is perspective explanatory drawing shown in the state before assembling the block holder for dental prostheses. For dental prosthesis after completion of processing when the dental prosthesis processed by the automatic cutting / grinding machine of the CAD / CAM system is a laminate veneer when the dental prosthesis block is composed of a plate-like member It is a perspective view which shows the shape of a block.

1 fixed part
1a Axis-shaped fixed member divided into two parts 2 Block for dental prosthesis
2a Protruding part 3 Holding part
3a Engagement part
3b Holding member
3ba Fixed holding member
3bb movable holding member 4 cushioning material

Claims (8)

A dental prosthesis block holder for producing a dental prosthesis by cutting and grinding a dental prosthesis block (2) with a cutting / grinding machine using a CAD / CAM system, holding unit for holding over the dental prosthesis block (2) cushioning material in at least two or more surfaces (4) and (3), the holding portion (3) and finally cutting and grinding integrated to A block holder for a dental prosthesis comprising a fixing portion (1) to be mounted on a processing machine. Holding portion (3) has an upper surface and an engaging portion for holding each engagement with the the lower surface of the dental prosthesis block (2) (3a, 3a) dental prosthesis according to claim 1, further comprising a Block holder for objects. Engaging portions (3a, 3a) of the holding part (3) is held respectively engaged to the projecting portion projecting from the upper and lower surfaces (2a, 2a) of the dental prosthesis block (2) The dental prosthesis block holder according to claim 2, which is an engaging portion . Engaging portions (3a, 3a) of the holding part (3) it is, which is part protruding portion of the raw material (2a, 2a) each engaged with holding constituting a for dental prosthesis block (2) The dental prosthesis block holder according to claim 3, which is an engaging portion . Engaging portions (3a, 3a) of the holding part (3) is an upper surface of the material constituting the a dental prosthesis block (2) is a separate material and the dental prosthesis block (2) The dental prosthesis block holder according to claim 3, wherein the dental prosthesis block holder is an engaging portion that is engaged with and held by protrusions (2a, 2a) separately fixed to the lower surface. When the dental prosthesis block (2) is composed of a plate-like member, the holding member (3b) holds the both sides of the dental prosthesis block (2) by holding parts (3b, 3b). The block holder for a dental prosthesis according to claim 1. The holding members (3b, 3b) of the holding part (3) hold and hold the fixed holding member (3ba) fixed to the fixing part (1) and the dental prosthesis block (2). The block holder for a dental prosthesis according to claim 6, which is a movable holding member (3bb) disposed and fixed to face the fixed holding member (3ba). The holding members (3b, 3b) of the holding part (3) are fixed to the fixing members (1a, 1a) each having a shape in which the fixing part (1) is divided into two in the axial direction. When the fixing member (1a, 1a) and the fixing holding member (3ba, 3ba) are integrated so as to hold and hold the dental prosthetic block (2), the holding The block holder for a dental prosthesis according to claim 6, wherein the part (3) and the fixing part (1) are formed simultaneously.

Images