Tooth restoration protection piece device

Abstract

The utility model discloses a dental restoration protection piece device which comprises a shell main body, a matrix belt and a matrix belt tensioning structure, wherein the shell main body is internally provided with a containing cavity, the containing cavity extends to the head end of the shell main body, and a head end cavity opening is formed in the end face of the head end; the matrix belt is of a tough sheet structure and is arranged at the head end cavity opening, and a lantern ring type structure is formed outside the head end cavity opening. The matrix belt tensioning structure is connected to the shell body, and the power output end of the matrix belt tensioning structure is detachably connected with the matrix belt. And under the driving of the matrix belt tensioning structure, the matrix belt enters and exits from the head end cavity opening along with the power output end. The assembling mode of the matrix belt is optimized, the matrix belt can be replaced independently, cost is reduced, and better economical efficiency is achieved; in addition, through optimization of the assembly mode, processing of the shell main body is not limited, the shell main body can be integrally formed, the production and assembly difficulty of the device is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of medical devices, in particular to a dental restoration guard sheet device. Background Art

[0002] A dental matrix clamp is an important tool used in the dental restoration process. Especially when filling dental caries or performing dental restoration, it can ensure the correct placement and fixed stability of the matrix band. The matrix band is a thin, flexible, and flexible sheet-like band structure used to surround the tooth wall and form a temporary barrier on the outer periphery of the tooth to fix the dental restoration material in place when it hardens.

[0003] The main function of the dental matrix clamp is to firmly surround and fix the matrix band around the tooth to form a barrier, which helps to shape and limit the outward diffusion and overflow of the restoration material in the cavity. And the dental matrix clamp has a structure for adjusting the tension of the matrix band, and dentists can control the tightness of the tightened matrix band to ensure that it firmly fixes the matrix in place.

[0004] The matrix band isolates the tooth being treated from adjacent teeth, making it easier for dentists to access and treat the target area; it is also used to prevent interference and contamination of adjacent teeth during the restoration process.

[0005] Using a dental matrix clamp also helps to create a restoration with a correct and distinct contour, which is crucial for maintaining the integrity and functionality of the tooth. The design of the dental matrix clamp fully considers the comfort requirements of patients. Its matrix band ensures that the restoration material does not penetrate into sensitive areas, thereby reducing the risk of postoperative sensitivity or discomfort for patients.

[0006] However, the current dental matrix clamps on the market still have the following deficiencies:

[0007] For example, the invention patent with the publication number CN102202597B discloses a dental matrix clamp. The assembly of the matrix band and the clamp body in this clamp is difficult. Generally, the clamp body needs to be designed into two openable parts. After the matrix band is installed, the two parts of the clamp body are hermetically installed. It can be seen that the installation of this kind of dental matrix clamp is complex and not conducive to production.

[0008] Therefore, how to solve the deficiencies existing in the above-mentioned prior art has become the subject to be studied and solved by the utility model. Summary of the Utility Model

[0009] The purpose of the utility model is to provide a dental restoration guard sheet device.

[0010] To achieve the above purpose, the technical solution adopted by the utility model is:

[0011] A dental restoration guard sheet device, comprising a housing body, a matrix strip and a matrix strip tensioning structure; wherein,

[0012] A receiving cavity is formed inside the housing body, and the receiving cavity extends to the head end of the housing body and forms a head end cavity opening at the end face of the head end;

[0013] The matrix strip is a thin sheet structure with toughness, which is arranged at the head end cavity opening and forms a collar-like structure outside the head end cavity opening;

[0014] The matrix strip tensioning structure is connected to the housing body, and its power output end is detachably connected to the matrix strip;

[0015] Driven by the matrix strip tensioning structure, the matrix strip follows the power output end to enter and exit inside and outside the head end cavity opening, so as to tension the toroidal cavity formed by surrounding the collar-like structure.

[0016] In a further aspect, the receiving cavity extends to the tail end of the housing body and forms a tail end cavity opening at the end face of the tail end, and the matrix strip tensioning structure is arranged in the receiving cavity.

[0017] In a further aspect, both ends of the matrix strip tensioning structure respectively penetrate through the head end cavity opening and the tail end cavity opening.

[0018] In a further aspect, the matrix strip tensioning structure includes a power input end and a power output end;

[0019] The power input end includes a dental screw cap, which is rotatably connected to the tail end of the housing body and is axially limited with the housing body;

[0020] The power input end includes a long screw rod, and the tail end of the long screw rod sequentially penetrates through the tail end cavity opening and the dental screw cap and is threadedly connected to the dental screw cap; the head end of the long screw rod is connected to a guiding structure, and the guiding structure is linearly slidably matched with the receiving cavity and is detachably connected to the matrix strip.

[0021] In a further aspect, the head end of the dental screw cap is sleeved outside the tail end of the housing body, the connection surface between the two is an annular surface, and the two annular surfaces are rotationally connected through a convex ring and a ring groove, and constitute the relative axial limit between the dental screw cap and the housing body.

[0022] In a further aspect, the guiding structure is synchronized with the long screw rod and is axially slidably matched with the receiving cavity; the receiving cavity is axially divided into a first cavity and a second cavity, the width of the second cavity is greater than that of the first cavity, the guiding structure is linearly slidably matched with the second cavity, and the tail end of the long screw rod is linearly slidably matched with the first cavity.

[0023] In a further solution, the guide structure includes a base plate connected to the long screw, a buckle cover is rotatably connected to the base plate, and a card block and a card slot are respectively provided on the opposite surfaces of the base plate and the buckle cover. The matrix belt is movably mounted on the card block through a through hole opened thereon, and the card slot is interference fit with the card block.

[0024] In a further solution, the shell body is a flat long strip structure, the accommodating cavity thereof is a flat long strip cavity, and the long screw has a flat cross-section corresponding to the flat cavity wall of the accommodating cavity.

[0025] In a further embodiment, the matrix strip is made of a transparent material.

[0026] In a further embodiment, the inner wall surface of the matrix belt opposite to the head end cavity opening gradually retracts from one side edge to the other side edge to form an inclined surface.

[0027] In a further embodiment, the tooth restoration guard device also includes a matrix band angle adjustment structure, which is rotatably arranged outside the head end cavity and has a hole for the matrix band to pass through. The rotating matrix band angle adjustment structure drives the matrix band to swing to adjust the angle of the matrix band.

[0028] In a further embodiment, the matrix belt angle adjustment structure includes a swivel rear cover, which is arranged in a U shape, and the two inner walls of the U-shaped opening are rotatably matched with the two outer walls of the shell body through a rotating shaft and a rotating groove, and the pore is arranged through the bottom of the U-shaped opening.

[0029] In a further solution, there is an arc-shaped notch between the two outer side walls of the shell body having the rotating groove or the rotating shaft, and the bottom of the U-shaped opening corresponds to the two arc-shaped notches.

[0030] In a further solution, the circumference of the rotating shaft is provided with a circle of arc-shaped convex teeth, and the rotating groove is a flower-shaped tooth groove. The circle of arc-shaped convex teeth is nested with the flower-shaped tooth groove and forms a shear force in the circumferential direction to hinder the rotation of the rear cover of the rotating body.

[0031] The working principle and advantages of this utility model are as follows:

[0032] The utility model optimizes the assembly method of the matrix belt by detachably installing the matrix belt on the power output end of the matrix belt tensioning structure, which can follow the power output end in and out of the accommodating cavity of the shell body. The matrix belt can be replaced separately, which reduces the cost and has better economy for such disposable or short-life products. In addition, the optimization of this assembly method makes the processing of the shell body unrestricted and can be formed in one piece, which reduces the production and assembly difficulty of the device and improves the production efficiency.

[0033] The matrix band of the present utility model can be installed and fixed in the form of a buckle, improving the convenience of assembly and fixing while ensuring firmness.

[0034] Regarding the flexibility of the angle adjustment of the matrix band in the present utility model, a rotating body rear cover is added, and the matrix band is driven by the rotatable rotating body rear cover to perform two-way angle adjustment.

[0035] The upper and lower surfaces of the shell body of the present utility model are set to be flat, which can facilitate stable hand-held operation of the flat surface. According to the flat space of the accommodation cavity, the long screw rod has flat cut surfaces on the upper and lower surfaces, and its width is made as large as possible, which can increase strength, ensure its sliding stability, and extend service life;

[0036] The matrix band of the present utility model can be made of a transparent material, which is convenient for observation and operation during tooth repair.

[0037] A non-stick coating can be added to the surface of the matrix band of the present utility model to prevent the matrix band from sticking to the paste used for tooth repair and making it easier to separate after the repair is completed. Description of the Drawings

[0038] Attached Figure 1 is the overall axonometric view of the embodiment of the present utility model;

[0039] Attached Figure 2 is the overall top view of the embodiment of the present utility model;

[0040] Attached Figure 3 is the overall side view of the embodiment of the present utility model;

[0041] Attached Figure 4 is of the present utility model Figure 3 is the sectional view at A-A in the present utility model;

[0042] Attached Figure 5 is the axonometric view of the shell body of the embodiment of the present utility model;

[0043] Attached Figure 6 is the side view of the shell body of the embodiment of the present utility model;

[0044] Attached Figure 7 is of the present utility model Figure 6 is the sectional view at B-B in the present utility model;

[0045] Attached Figure 8 is the exploded view of the matrix band tensioning structure and the matrix band of the embodiment of the present utility model;

[0046] Attached Figure 9 is the top view of the tooth cap of the embodiment of the present utility model;

[0047] Attached Figure 10 is of the present utility model Figure 9 is the sectional view at C-C in the present utility model;

[0048] Appendix Figure 11 is an axonometric view of the swivel back cover according to an embodiment of the present utility model;

[0049] Appendix Figure 12 is a side view of the swivel back cover according to an embodiment of the present utility model;

[0050] Appendix Figure 13 is a top view of the swivel back cover according to an embodiment of the present utility model;

[0051] Appendix Figure 14 is a sectional view when the matrix band wraps the tooth according to an embodiment of the present utility model.

[0052] In the above drawings:

[0053] 1 housing main body;

[0054] 101 flat surface;

[0055] 11 accommodation cavity;

[0056] 111 first cavity;

[0057] 112 second cavity;

[0058] 113 convex ring;

[0059] 114 rotating shaft;

[0060] 115 arc-shaped notch;

[0061] 116 extension plate;

[0062] 117 arc-shaped convex teeth;

[0063] 12 head end cavity opening;

[0064] 13 tail end cavity opening;

[0065] 2 matrix band;

[0066] 21 sleeve-shaped cavity;

[0067] 22 through hole;

[0068] 23 inclined surface;

[0069] 3 matrix band tensioning structure;

[0070] 31 tooth screw cap;

[0071] 311 annular groove;

[0072] 312 internal thread;

[0073] 32 long screw;

[0074] 321 external thread;

[0075] 322 flat cut surface;

[0076] 33 Guide structure;

[0077] 331 Substrate;

[0078] 332 Buckle cover;

[0079] 333 Clamping block;

[0080] 334 Card slot;

[0081] 4 Matrix belt angle adjustment structure;

[0082] 41 Rotating body rear cover;

[0083] 411 Pore;

[0084] 412 Rotating groove. Specific implementation mode

[0085] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0086] Embodiment: The present case will be clearly described below with diagrams and detailed descriptions. After any person skilled in the art understands the embodiments of the present case, the techniques taught by the present case can be changed and modified without departing from the spirit and scope of the present case.

[0087] The terms used in this article are only for describing specific embodiments and are not intended to limit the present case. Singular forms such as "a", "this", "this", "the present", and "the" also include plural forms as used herein.

[0088] Regarding the use of "first", "second", etc. in this article, it does not particularly refer to the meaning of order or sequence, nor is it used to limit the present case. It is only used to distinguish components or operations described with the same technical terms.

[0089] Regarding the use of "connection" or "positioning" in this article, it can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, and can also refer to two or more components or devices operating or acting on each other.

[0090] Regarding the use of "comprising", "including", "having", etc. in this article, they are all open-ended terms, that is, they mean including but not limited to.

[0091] Regarding the use of "front", "rear", "upper", "lower", "left", "right", etc. in this article, they are all directional terms. In the present case, they are only used to illustrate the positional relationship between various structures and are not used to limit the protection scheme of the present case and the specific direction during actual implementation.

[0092] See the appendix Figure 1-14, a dental restoration guard sheet device, comprising a shell main body 1, a matrix band 2, a matrix band tensioning structure 3 and a matrix band angle adjusting structure 4.

[0093] Wherein, an accommodation cavity 11 is formed inside the shell main body 1, and the accommodation cavity 11 extends to the head end of the shell main body 1 and forms a head end cavity opening 12 on the end face of the head end; the accommodation cavity 11 can also extend to the tail end of the shell main body 1 and form a tail end cavity opening 13 on the end face of the tail end.

[0094] The matrix band 2 is a thin sheet structure with toughness, and the matrix band 2 is arranged at the head end cavity opening 12 and forms a loop structure outside the head end cavity opening 12. During operation, the loop structure can enclose the tooth. In this embodiment, the inner wall surface of the matrix band 2 opposite to the head end cavity opening 12 gradually converges from one side edge to the other side edge, forming an inclined surface 23, as shown in Figure 14 ; Since most of the teeth to be restored are posterior molars, which are larger at the top and smaller at the bottom, the setting of the inclined surface 23 better adapts to the tooth shape and improves the fitting degree with the tooth wall; of course, for teeth with different shapes, the matrix band 2 with inclined surfaces 23 at different angles can be replaced.

[0095] In this embodiment, the matrix band 2 is made of a transparent material, specifically, transparent glass fiber reinforced plastic or polymer material (such as ultra-high molecular weight polyethylene, polyimide) can be used, and this kind of transparent material is convenient for observation and operation during tooth restoration.

[0096] The matrix band 2 can also be made of carbon fiber composite material, or metal materials such as stainless steel, titanium alloy or nickel-based alloy.

[0097] In order to prevent the matrix band 2 from sticking to the paste for repairing teeth and make it easier to separate after the repair is completed, a non-stick coating, specifically a Teflon coating, can be added to the surface of the matrix band 2.

[0098] The matrix band tensioning structure 3 is connected to the shell main body 1, and it includes a power input end and a power output end, and the power output end is detachably connected to the matrix band 2. Driven by the matrix band tensioning structure 3, the matrix band 2 moves in and out of the head end cavity opening 12 following the power output end to tension the loop-shaped cavity 21 formed by the loop structure.

[0099] In this embodiment, the matrix band tensioning structure 3 is arranged in the accommodation cavity 11 and its two ends respectively penetrate through the head end cavity opening 12 and the tail end cavity opening 13. Such a setting does not affect holding the shell main body 1 and is convenient for operation.

[0100] In other embodiments, the matrix belt tensioning structure 3 may also be arranged on the surface of the shell body 1. The accommodating cavity 11 penetrates through the surface of the shell body 1 to form a sliding groove for the matrix belt tensioning structure 3 to drive the matrix belt 2 in the accommodating cavity 11 to stretch and slide (not shown in the figure).

[0101] In other embodiments, the entire tooth repair and protection sheet device may also be made in a similar style to a retractable utility knife (not shown in the figure).

[0102] In this embodiment, the power input end includes a tooth-shaped cap 31, which is a cylindrical structure with a thick head and a thin tail. It is rotatably connected to the tail end of the shell body 1 and is axially limited with respect to the shell body 1.

[0103] The power input end includes a long screw 32. The tail end of the long screw 32 sequentially penetrates through the tail end cavity opening 13 and the tooth-shaped cap 31 and is threadedly connected to the tooth-shaped cap 31. The head end of the long screw 32 is connected to a guiding structure 33, which is in linear sliding fit with the accommodating cavity 11 and is detachably connected to the matrix belt 2.

[0104] The guiding structure 33 is synchronized with the long screw 32 and is axially slidably engaged with the accommodating cavity 11.

[0105] The accommodating cavity 11 is axially divided into a first cavity 111 and a second cavity 112. The width of the second cavity 112 is greater than that of the first cavity 111. The guiding structure 33 is in linear sliding fit with the second cavity 112, and the tail end of the long screw 32 is in linear sliding fit with the first cavity 111. Since the width of the second cavity 112 is greater than that of the first cavity 111, the guiding structure 33 is restricted by the end face at the junction of the first cavity 111 and the second cavity 112 and will not enter the first cavity 111.

[0106] Among them, the head end of the tooth-shaped cap 31 is sleeved outside the tail end of the shell body 1. The connection surface between the two is an annular surface. The two annular surfaces are rotatably connected through a convex ring 113 and a ring groove 311, and constitute the relative axial limit between the tooth-shaped cap 31 and the shell body 1. In this embodiment, the convex ring 113 is arranged on the outer annular surface of the shell body 1, and the ring groove 311 is arranged on the inner annular surface of the tooth-shaped cap 31. In other embodiments, the arrangements of the convex ring 113 and the ring groove 311 may be opposite; the convex ring 113 and the ring groove 311 are snap-fitted, which can ensure that the tooth-shaped cap 31 can only rotate outside the tail end of the shell body 1 and cannot slide axially along the shell body 1. The convex ring 113 and the ring groove 311 can be arranged in two pairs side by side, and the cross section is semi-circular, such as Figure 4 ; the tooth-shaped cap 31 can be a plastic part with a certain elastic deformation amount. After being threadedly installed with the long screw 32, it can be further snap-connected to the shell body 1 through the convex ring 113 and the ring groove 311.

[0107] When the tensioning matrix belt 2 is operated, the tooth screw cap 31 can be rotated forward or backward. At this time, the external thread 321 on the outer wall of the long screw 32 cooperates with the internal thread 312 in the inner cavity of the tooth screw cap 31. Under the linear limit of the guiding structure 33 at its head end, the long screw 32 can linearly reciprocate along the accommodating cavity 11, thereby driving the matrix belt 2 to reciprocate. The matrix belt 2 can be contracted into the accommodating cavity 11 or extended out of the accommodating cavity 11; when the matrix belt 2 gradually contracts into the accommodating cavity 11, the circumferential length of the matrix belt 2 exposed outside the head end cavity opening 12 gradually decreases, and the sleeve-shaped cavity 21 formed by surrounding also gradually decreases, thereby realizing the tightening and fixing of the teeth; when the matrix belt 2 gradually extends out of the accommodating cavity 11, the circumferential length of the matrix belt 2 exposed outside the head end cavity opening 12 gradually increases, and the sleeve-shaped cavity 21 formed by surrounding also gradually increases, thereby realizing the loosening of the teeth. The whole device is simple to operate and convenient to use.

[0108] The guiding structure 33 can also be used as a fixing structure for the matrix belt 2, such as Figure 4 and Figure 8 ; The guiding structure 33 includes a base plate 331 connected to the long screw 32. A buckle cover 332 is rotatably connected to the base plate 331. Clamping blocks 333 and clamping grooves 334 are respectively provided on the opposite surfaces of the base plate 331 and the buckle cover 332. The matrix belt 2 is movably sleeved on the clamping blocks 333 through through holes 22 opened thereon, and the clamping grooves 334 are in interference fit with the clamping blocks 333.

[0109] In this embodiment, the buckle cover 332 is rotatably connected to the base plate 331 through an elastic connection key. The buckle cover 332, the elastic connection key and the base plate 331 can be made of plastic parts with a certain elastic deformation amount; the clamping block 333 is cylindrical and integrally formed on the base plate 331, and the clamping groove 334 is cylindrical and integrally formed on the buckle cover 332; when the buckle cover 332 is opened, the clamping groove 334 is separated from the clamping block 333, and the matrix belt 2 can be removed from the clamping block 333 for separate replacement; when installing the matrix belt 2, the through hole 22 on the matrix belt 2 is sleeved on the clamping block 333, and then the buckle cover 332 is closed, and the clamping groove 334 is sleeved outside the clamping block 333, and the two are in interference fit and not easy to separate, thereby realizing the fixation of the matrix belt 2. The operation is simple and the use is convenient. In other embodiments, the clamping block 333 can also be installed on the buckle cover 332, and the clamping groove 334 can be installed on the base plate 331.

[0110] In this embodiment, the housing main body 1 is a flat strip-shaped structure, and its accommodating cavity 11 is a flat strip-shaped cavity. The long screw 32 has a flat section 322 corresponding to the flat cavity wall of the accommodating cavity 11. The flat section 322 is a smooth section, and an external thread 321 for thread cooperation with the tooth screw cap 31 is provided on the circumferential surface outside the section. Such as Figure 3 and Figure 5, it can be seen that the upper and lower surfaces of the shell body 1 are set as flat surfaces 101, which can facilitate stable hand-held operation of the flat surface 101. According to the flat space of the accommodation cavity 11, the upper and lower surfaces of the long screw 32 are set as flat cut surfaces 322, and its width is made as large as possible to increase strength, ensure its sliding stability and extend service life.

[0111] In this embodiment, the matrix belt angle adjusting structure 4 is rotatably arranged outside the head end cavity opening 12, and has a pore 411 for the matrix belt 2 to pass through. The rotating matrix belt angle adjusting structure 4 drives the matrix belt 2 to swing so as to adjust the angle of the matrix belt 2.

[0112] Among them, the matrix belt angle adjusting structure 4 includes a rotating body rear cover 41, which is set as a U shape. The two inner side walls of the U-shaped opening are rotationally matched with the two outer side walls of the shell body 1 through a rotating shaft 114 and a rotating groove 412, and the pore 411 is arranged through the bottom of the U-shaped opening. In this embodiment, the rotating shaft 114 is fixed on the two outer side walls of the shell body 1, and the rotating groove 412 is opened on the two inner side walls of the U-shaped opening, as shown in Figure 4-7 ; in other embodiments, the positions of the rotating shaft 114 and the rotating groove 412 can be opposite.

[0113] In this embodiment, there is an arc-shaped notch 115 between the two outer side walls of the shell body 1 having the rotating shaft 114, and the bottom of the U-shaped opening corresponds to the two arc-shaped notches 115. After the two arc-shaped notches 115 are opened, the two outer side walls of the shell body 1 having the rotating shaft 114 are protruding extension plates 116. When the shell body 1 is a plastic part with a certain elastic deformation amount, the two extension plates 116 will have a certain inward elastic deformation amount. In this way, when the rotating body rear cover 41 is installed, the two extension plates 116 can be directly pressed inward to facilitate the corresponding cooperation between the rotating shaft 114 and the rotating groove 412, that is, it is beneficial to the installation and disassembly of the rotating body rear cover 41.

[0114] In addition, to facilitate the shell body 1 in the hand-held state, the sleeve-shaped cavity 21 formed by surrounding the matrix belt 2 can cover the teeth up and down, and the belt surface of the matrix belt 2 can be opposite to the flat surface of the shell body 1. In this way, the rotating groove 412 needs to be arranged on the other two surfaces in the circumferential direction of the shell body 1; when the rotating body rear cover 41 is rotated, the rotating body rear cover 41 can rotate bidirectionally relative to the two flat surfaces of the shell body 1.

[0115] In order to fix the angle of the matrix belt 2 after adjusting its angle, the circumferential surface of the rotating shaft 114 has a circle of arc-shaped convex teeth 117, and the rotating groove 412 is a flower-shaped tooth groove. The circle of arc-shaped convex teeth 117 is nested with the flower-shaped tooth groove, and a shearing force that hinders the rotation of the rear cover 41 of the rotating body is formed in the circumferential direction. That is, when the rear cover 41 of the rotating body is manually rotated forcefully, the rear cover 41 of the rotating body can rotate under the action of torsion. After the external force is removed, the rear cover 41 of the rotating body is self-locked on the arc-shaped convex teeth 117, and the angle of the matrix belt 2 remains fixed. This design solves the defect that the angle of the matrix belt 2 in the prior art is not convenient to adjust, and the whole fixture needs to be moved during adjustment, and the use is not flexible enough.

[0116] When the whole device is installed, the matrix belt 2 can be fixed on the guiding structure 33 at the head end of the long screw 32, then the long screw 32 is inserted into the accommodating cavity 11 from the head end cavity opening 12, the tooth cap 31 is rotated and fixed at the tail ends of the long screw 32 and the shell main body 1, and finally the matrix belt 2 is passed through the pore 411 on the rear cover 41 of the rotating body, and then the rear cover 41 of the rotating body is installed at the head end of the shell main body 1. The above is only one installation step listed in this embodiment, and this embodiment is not limited to this installation step, and other installation steps can also be adopted.

[0117] The above embodiments are only used to illustrate the technical concept and characteristics of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly, and cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A tooth repair plate device, characterized in that: It includes a shell body, a matrix belt and a matrix belt tensioning structure; wherein, A receiving cavity is provided inside the shell body, the receiving cavity extends to the head end of the shell body, and a head end cavity opening is formed on the end surface of the head end; The matrix belt is a thin sheet structure with toughness, which is arranged at the head end cavity opening and forms a ring structure outside the head end cavity opening; The matrix belt tensioning structure is connected to the shell body, and its power output end is detachably connected to the matrix belt; Driven by the matrix belt tensioning structure, the matrix belt follows the power output end in and out of the head end cavity to tension the annular cavity formed by the annular structure.

2. A tooth repair plate device according to claim 1, characterized in that: The accommodating cavity extends to the tail end of the shell body, and forms a tail end cavity opening on the tail end surface. The matrix belt tensioning structure is arranged in the accommodating cavity, and includes a power input end and a power output end. The power input end includes a threaded screw cap, which is rotatably connected to the rear end of the shell body and is axially limited with the shell body; The power input end includes a long screw, the tail end of which passes through the tail end cavity and the threaded cover in sequence and is threadedly connected to the threaded cover; the head end of the long screw is connected to a guide structure, which is linearly slidably matched with the accommodating cavity and is detachably connected to the matrix belt.

3. A tooth repair plate device according to claim 2, characterized in that: The head end of the threaded screw cap is sleeved on the outside of the tail end of the shell body, and the connecting surface of the two is an annular surface. The two annular surfaces are rotationally connected through a convex ring and an annular groove, and constitute the relative axial limit of the threaded screw cap and the shell body.

4. A tooth repair plate device according to claim 2, characterized in that: The guide structure is synchronized with the long screw and axially slidably cooperates with the accommodating cavity; the guide structure includes a base plate connected to the long screw, a buckle cover is rotatably connected to the base plate, and a clamping block and a clamping groove are respectively provided on the opposite surfaces of the base plate and the buckle cover, the matrix belt is movably sleeved on the clamping block through the through hole opened thereon, and the clamping groove is interference fit with the clamping block.

5. A tooth repair plate device according to claim 2, characterized in that: The shell body is a flat long strip structure, the accommodating cavity is a flat long strip cavity, and the long screw has a flat section corresponding to the flat cavity wall of the accommodating cavity.

6. A tooth repair plate device according to claim 1, characterized in that: The matrix belt is made of transparent material; the inner wall surface of the matrix belt opposite to the head end cavity opening gradually retracts from one side edge to the other side edge to form an inclined surface.

7. A tooth repair plate device according to claim 1, characterized in that: It also includes a matrix belt angle adjustment structure, which is rotatably arranged outside the head end cavity and has a hole for the matrix belt to pass through. The rotating matrix belt angle adjustment structure drives the matrix belt to swing to adjust the matrix belt angle.

8. A tooth repair plate device according to claim 7, characterized in that: The matrix belt angle adjustment structure includes a swivel rear cover, which is set to be U-shaped, and the two inner walls of its U-shaped opening are rotatably matched with the two outer walls of the shell body through a rotating shaft and a rotating groove, and the pore is set through the bottom of the U-shaped opening.

9. A tooth repair plate device according to claim 8, characterized in that: There is an arc-shaped notch between the two outer side walls of the shell body having the rotating groove or the rotating shaft, and the bottom of the U-shaped opening corresponds to the two arc-shaped notches.

10. A tooth repair plate device according to claim 8, characterized in that: The circumference of the rotating shaft is provided with a circle of arc-shaped convex teeth, and the rotating groove is a flower-shaped tooth groove. The circle of arc-shaped convex teeth is nested with the flower-shaped tooth groove and forms a shear force in the circumferential direction to hinder the rotation of the rear cover of the rotating body.

Images