A clamping type rigid precision attachment body

Abstract

A kind of rigid precision attachment of clamping type.The utility model discloses to solve the problems of existing technology, such as greater resistance of denture, affecting the convenience and durability, the manufacturing process is relatively complex, etc.Technical scheme: it is composed of two parts of female body and male body that are mutually embedded, and the female body and the male body are provided with slidingly fitted common precision positioning channel, the feature is that the female body is composed of female base plate and the sliding groove body thereon, the sliding groove body is provided with vertically extending common precision positioning channel sliding groove, the common precision positioning channel sliding groove is composed of vertically extending groove bottom plane, long groove side plane and inclined front plane, the male body is composed of male base plate and the vertically extending common precision positioning channel slide rail thereon, the common precision positioning channel slide rail is composed of vertically extending rail front plane, long rail side plane and inclined rear plane, the female body or the male body is metal integrated structure, and is directly fixed on the metal movable support of denture or the metal crown side wall of abutment by welding.

Description

Technical Field

[0001] This utility model relates to dental restoration products, and in particular to a clasp-type rigid precision attachment. It is applicable to the process of restoring missing teeth through a fixed-removable denture. Background Technology

[0002] Dental prosthodontics is a medical technique for restoring the shape and function of teeth. Methods for restoring missing teeth include fixed prostheses, removable prostheses, and dental implants. For removable prostheses, traditional techniques generally use clasp-type removable partial dentures, but these have drawbacks such as poor aesthetics, decreasing retention over time, and often causing varying degrees of damage to the abutment teeth. With continuous technological advancements, removable prostheses now utilize precision attachment technology to improve wearing comfort and retention, while also considering aesthetics and functionality. This precision attachment employs a fixed-removable clasp structure, specifically consisting of two parts: a removable male attachment and a female attachment. The male attachment is typically fixed to the abutment tooth, while the female attachment is typically fixed to the removable denture. Occlusion and removal are achieved through a common precision insertion path on both the male and female attachments.

[0003] The precision attachments can be specifically divided into two types: elastic attachments and rigid attachments. Elastic attachments, where the male and female bodies fit together, have a certain degree of mobility in a specific direction, reducing the load on the abutment teeth. However, because the connection between the male or female body of the elastic attachment and the abutment teeth or denture requires elastic plastic joints or adhesive kits, these joints or kits harden and lose their elasticity over time, causing the intended mobility to fail and the removable denture's performance to deteriorate. Rigid attachments, on the other hand, directly fix the male or female body to the metal crown of the abutment teeth or the metal removable framework of the denture through welding. Since no mobility is required between the male and female bodies after fitting together, elastic components such as plastic joints or adhesive kits are not needed, and the removable denture's performance does not deteriorate over time. However, existing rigid precision attachments have several drawbacks: firstly, due to the tortuous shape of their common precision placement path cross-section, numerous vertical planes, and large volume, the resistance to denture insertion and removal is significant, affecting ease of use and durability; secondly, the manufacturing process is relatively complex, making it difficult to achieve ideal wearing comfort and retention. Utility Model Content

[0004] In order to overcome the problems of existing precision attachments, such as the tortuous cross-sectional shape of the common precision placement path, the large number of vertical planes, the large volume, the large resistance to denture insertion and removal, which affects the convenience and durability of use, and the relatively complex manufacturing process, the purpose of this utility model is to provide an improved clamping rigid precision attachment that can overcome the defects of the prior art.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a fixed rigid precision attachment body, which is composed of two removable interlocking female body and male body, the female body and male body being used to fix to the denture and abutment teeth respectively, and the female body and male body having a common precision positioning path for sliding engagement; characterized in that: the female body is composed of a female base plate and a sliding groove body protruding from the female base plate, the sliding groove body having a vertically extending common precision positioning path groove, the common precision positioning path groove being composed of a groove bottom plane, a long groove side plane and an inclined front plane, wherein the groove bottom plane is parallel to the female base plate, the long groove side plane is perpendicular to the female base plate and one side of the long groove side plane is connected to one side of the groove bottom plane, and one side of the inclined front plane is connected to the other side of the groove bottom plane and then inclined inward and forward; the male body is composed of a male base plate and a sliding groove body protruding from the male base plate and a sliding groove body protruding from the female base plate. The prosthetic body is formed by a vertically extending common precision positioning track slide rail on the prosthetic substrate. The common precision positioning track slide rail consists of a front rail plane, a long rail side plane, and an inclined rear plane, which are respectively vertically extending. The front rail plane is parallel to the prosthetic substrate, the long rail side plane is perpendicular to the prosthetic substrate and one side of the long rail side plane is connected to one side of the front rail plane, and the other side of the long rail side plane is connected to the prosthetic substrate. One side of the inclined rear plane is connected to the other side of the front rail plane and then inclined inward and backward. The other side of the inclined rear plane is connected to the prosthetic substrate. When the anterior and posterior bodies slide together, the front rail plane is abutted against the groove bottom plane, the long rail side plane is abutted against the long groove side plane, and the inclined rear plane is abutted against the inclined front plane. The anterior or posterior bodies are both integral metal structures and are directly fixed to the metal movable framework of the denture or the metal crown sidewall of the abutment tooth by welding.

[0006] The inclined front plane and the vertical front plane of the slide body on the same side of the above technical solution can be connected by a transition fillet one; the inclined rear plane and the rail front plane can be connected by a transition fillet two; the bottom plane of the groove and the inclined front plane can be connected by a short groove side plane that is perpendicular to the negative substrate and extends vertically; and the positive substrate and the inclined rear plane can be connected by a short rail side plane that is perpendicular to the positive substrate and extends vertically.

[0007] The aforementioned technical solution allows for a three-phase connection between the front plane of the rail and the side plane of the long rail via a transition fillet.

[0008] In the above technical solution, the distance between the vertical forward plane of the slide body on the same side as the inclined front plane and the negative substrate can be greater than the distance between the vertical forward plane of the slide body on the same side as the long groove side plane and the negative substrate; correspondingly, the distance between the positive substrate plane on the same side as the inclined rear plane and the front rail plane can be greater than the distance between the positive substrate plane on the same side as the long rail side plane and the front rail plane; when the negative body and the positive body slide together, the vertical forward plane of the slide body abuts against the positive substrate plane, and the vertical forward plane of the slide body abuts against the positive substrate plane.

[0009] The height of the slide body and the common precision positioning slide rail in the above technical solution can both be 2.7-3.0 mm; the width of the slide body and the positive body can both be 3.5-4.0 mm; and the total thickness of the slide body and the positive body together can be 2.8-3.3 mm.

[0010] The negative or positive body described in the above technical solution is fixed to the metal movable framework of the denture or the sidewall of the metal crown of the abutment tooth. Specifically, the negative body can be fixed to the metal movable framework of the denture, and the positive body can be fixed to the sidewall of the metal crown of the abutment tooth; or the negative body can be fixed to the sidewall of the metal crown of the abutment tooth, and the positive body can be fixed to the metal movable framework of the denture.

[0011] The negative or positive body described in the above technical solution can be prefabricated into an integral molded product through precision machining; the negative substrate can have a protruding edge 1 on the outer side of the slide body, so as to weld and fix the edge 1 to the metal movable framework of the denture or the metal crown sidewall of the abutment tooth using a small self-fusion welding device; the positive substrate can also have an edge 2 protruding from the common precision placement track slide rail on its upper or lower side, so as to weld and fix the edge 2 to the metal crown sidewall of the abutment tooth or the metal movable framework of the denture using a small self-fusion welding device.

[0012] After the sliding engagement of the negative and positive bodies described in the above technical solution, how to ensure that the removable denture can be fixed during use without unnecessary slippage is solved by setting other fixation structures on the removable denture, rather than by the precision attachment itself. The precision attachment only distributes and bears the chewing load that is carried on the traditional removable denture clasp, while the fixation measures for the removable denture are existing in the current precision attachment technology.

[0013] The beneficial effects of this invention are as follows: First, because the cross-sectional shapes of the common precision positioning channel groove and the common precision positioning channel rail are relatively simple, each consisting of a vertically extending parallel plane, a vertical plane, and an inclined plane, the fewer vertical planes make it easier to manufacture small-sized female and male bodies. Therefore, the resistance to denture insertion and removal is lower, effectively improving the ease of use and durability of removable dentures using precision attachments. Furthermore, due to the fewer vertical planes, the friction area of ​​each vertical plane is larger, which is beneficial for improving lateral retention. Second, because both the female and male bodies are integral metal structures, precise fitting between the female and male bodies can be achieved through precision machining of the metal material. They can then be directly fixed to the metal movable framework of the denture or the sidewall of the metal crown of the abutment tooth by welding. Therefore, manufacturing is relatively convenient, and it is easier to ensure the chewing function, wearing comfort, retention, and durability of the removable denture.

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of one embodiment of the present invention.

[0016] Figure 2 yes Figure 1 A schematic diagram illustrating the separation of negative and positive bodies.

[0017] Figure 3 yes Figure 2 A schematic diagram showing the positive body rotating at an angle.

[0018] In the diagram: 1. Negative body; 2. Positive body; 3. Negative substrate; 4. Slide body; 5. Common precision positioning slide; 6. Slide bottom plane; 7. Long slide side plane; 8. Inclined front plane; 9. Positive substrate; 10. Common precision positioning slide rail; 11. Rail front plane; 12. Long rail side plane; 13. Inclined rear plane; 14. Vertical front plane of slide body 1; 15. Transition fillet 1; 16. Transition fillet 2; 17. Short slide side plane; 18. Short rail side plane; 19. Transition fillet 3; 20. Vertical front plane of slide body 2; 21. Positive substrate plane 1; 22. Positive substrate plane 2; 23. Edge 1; 24. Edge 2. Detailed Implementation

[0019] Reference Figures 1-3This fastener-type wall-mounted precision attachment consists of two parts: a removable, interlocking female body 1 and a male body 2. The female body 1 and male body 2 are respectively used to fix the tooth to the abutment and the denture. Both the female body 1 and male body 2 have a common precision positioning path with sliding engagement. The female body 1 is characterized by: a female base plate 3 and a sliding groove body 4 protruding from the female base plate 3; the sliding groove body 4 has a vertically extending common precision positioning path groove 5, which is composed of a vertically extending groove bottom plane 6, a long groove side plane 7, and an inclined front plane 8. The groove bottom plane 6 is parallel to the female base plate 1, the long groove side plane 7 is perpendicular to the female base plate 1 and one side of the long groove side plane 7 connects to one side of the groove bottom plane 6, and one side of the inclined front plane 8 connects to the other side of the groove bottom plane 6 and then tilts inward and forward. The male body 2 consists of a male base plate 9 and a vertically extending common precision positioning path rail 1 protruding from the male base plate 9. The common precision positioning slide rail 10 is composed of a front rail plane 11, a long rail side plane 12, and an inclined rear plane 13, which extend vertically. The front rail plane 11 is parallel to the male substrate 9, the long rail side plane 12 is perpendicular to the male substrate 9 and one side of the long rail side plane 12 is connected to one side of the front rail plane 11, and the other side of the long rail side plane 12 is connected to the male substrate 9. One side of the inclined rear plane 13 is connected to the other side of the front rail plane 11 and then tilts inward and backward. The other side of the inclined rear plane 13 is connected to the male substrate 9. When the female body 1 and the male body 2 slide together, the front rail plane 11 is attached to the groove bottom plane 6, the long rail side plane 12 is attached to the long groove side plane 7, and the inclined rear plane 13 is attached to the inclined front plane 8. The female body 1 or the male body 2 is a one-piece metal structure and is directly fixed to the metal movable framework of the denture or the metal crown sidewall of the abutment tooth by welding.

[0020] In addition, the inclined front plane 8 and the vertical front plane 14 of the slide body on the same side are connected by a transition fillet 15, the inclined rear plane 13 and the rail front plane 11 are connected by a transition fillet 16, the groove bottom plane 6 and the inclined front plane 8 are connected by a short groove side plane 17 that is perpendicular to and extends vertically with the negative substrate 3, and the positive substrate 9 and the inclined rear plane 13 are connected by a short rail side plane 18 that is perpendicular to and extends vertically with the positive substrate 9.

[0021] The front plane 11 of the rail and the side plane 12 of the long rail are connected by a transition fillet 3 19.

[0022] The distance between the vertical forward plane 14 of the slide body on the same side as the inclined front plane 8 and the female substrate 3 is greater than the distance between the vertical forward plane 20 of the slide body on the same side as the long groove side plane 7 and the female substrate 3; correspondingly, the distance between the positive substrate plane 21 on the same side as the inclined rear plane 13 and the front rail plane 11 is greater than the distance between the positive substrate plane 22 on the same side as the long rail side plane 12 and the front rail plane 11; when the female body 1 and the positive body 2 slide together, the vertical forward plane 14 of the slide body abuts against the positive substrate plane 21, and the vertical forward plane 20 of the slide body abuts against the positive substrate plane 22.

[0023] The height of the slide body 4 and the common precision positioning slide rail 10 are both 2.7 to 3.0 mm; the width of the slide body 4 and the positive body 2 are both 3.5 to 4.0 mm; the total thickness of the slide body 4 and the positive body 2 together is 2.8 to 3.1 mm.

[0024] The negative body 1 is fixed to the metal removable framework of the denture, and the positive body 2 is fixed to the sidewall of the metal crown of the abutment tooth. Alternatively, the negative body 1 can be fixed to the sidewall of the metal crown of the abutment tooth, and the positive body 2 can be fixed to the metal removable framework of the denture.

[0025] During fabrication, both the anterior body 1 and the posterior body 2 are prefabricated as integral molded products through precision machining. The anterior base plate 3 has a protruding edge 23 on the outer side of the slide body 4 to facilitate welding and fixing the edge 23 to the metal movable framework of the denture using a small self-fluxing welding device. The posterior base plate 9 has a protruding edge 24 on its lower side, extending beyond the common precision positioning slide rail 10, to facilitate welding and fixing the edge 24 to the sidewall of the metal crown of the abutment tooth using a small self-fluxing welding device. Clinically, a porcelain or zirconia crown can also be fixed to the outer side of the metal crown of the abutment tooth. The materials of the anterior and posterior bodies can be stainless steel or other alloy materials.

Claims

1. A clasp-type rigid precision attachment, comprising two removable, interlocking female and male parts, wherein the female and male parts are respectively used for fixing to a denture and an abutment tooth, and the female and male parts are provided with a common precision insertion path for sliding engagement; characterized in that: The negative body is composed of a negative substrate and a slide body protruding from the negative substrate. The slide body has a vertically extending common precision positioning channel slide. The common precision positioning channel slide consists of a vertically extending bottom plane, a long side plane, and an inclined front plane. The bottom plane is parallel to the negative substrate, the long side plane is perpendicular to the negative substrate and one side of the long side plane is connected to one side of the bottom plane, and one side of the inclined front plane is connected to the other side of the bottom plane before tilting inward and forward. The positive body is composed of a positive substrate and a vertically extending common precision positioning channel slide rail protruding from the positive substrate. The common precision positioning channel slide rail consists of a vertically extending front plane, a long side plane, and an inclined rear plane. The device comprises a planar structure, wherein the front rail plane is parallel to the positive substrate, the long rail side plane is perpendicular to the positive substrate and one side of the long rail side plane is connected to one side of the front rail plane, the other side of the long rail side plane is connected to the positive substrate, one side of the inclined rear plane is connected to the other side of the front rail plane and then inclined inward and backward, the other side of the inclined rear plane is connected to the positive substrate; when the female body and the male body slide together, the front rail plane abuts the bottom of the slot plane, the long rail side plane abuts the long slot side plane, and the inclined rear plane abuts the inclined front plane; the female body or the male body is a one-piece metal structure and is directly fixed to the metal movable framework of the denture or the metal crown sidewall of the abutment tooth by welding.

2. The clamping rigid precision attachment according to claim 1, characterized in that: The inclined front plane and the vertical front plane of the slide body on the same side are connected by a transition fillet one; the inclined rear plane and the rail front plane are connected by a transition fillet two; the bottom plane of the groove and the inclined front plane are connected by a short groove side plane that is perpendicular to and extends vertically from the negative substrate; the positive substrate and the inclined rear plane are connected by a short rail side plane that is perpendicular to and extends vertically from the positive substrate.

3. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The front plane of the rail and the side plane of the long rail are connected by a three-phase transition fillet.

4. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The distance between the vertical forward plane of the slide body on the same side as the inclined front plane and the female substrate is greater than the distance between the vertical forward plane of the slide body on the same side as the long groove side plane and the female substrate; correspondingly, the distance between the male substrate plane on the same side as the inclined rear plane and the front rail plane is greater than the distance between the male substrate plane on the same side as the long rail side plane and the front rail plane; when the female body and the male body slide together, the vertical forward plane of the slide body abuts against the male substrate plane, and the vertical forward plane of the slide body abuts against the male substrate plane.

5. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The height of both the slide body and the common precision positioning slide rail is 2.7 to 3.0 mm.

6. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The width of both the chute body and the positive body is 3.5-4.0 mm; the total thickness of the chute body and the positive body together is 2.8-3.3 mm.

7. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The negative or positive body is fixed to the metal removable framework of the denture or the sidewall of the metal crown of the abutment tooth. Specifically, the negative body is fixed to the metal removable framework of the denture, and the positive body is fixed to the sidewall of the metal crown of the abutment tooth; or the negative body is fixed to the sidewall of the metal crown of the abutment tooth, and the positive body is fixed to the metal removable framework of the denture.

8. The clamping rigid precision attachment according to claim 1 or 2, characterized in that: The negative substrate has a protruding edge 1 on the outer side of the slide body, so that the welding equipment can weld and fix the edge 1 to the metal movable bracket of the denture or the metal crown sidewall of the abutment tooth; the positive substrate has an edge 2 protruding from the common precision placement track slide rail on its upper or lower side, so that the welding equipment can weld and fix the edge 2 to the metal crown sidewall of the abutment tooth or the metal movable bracket of the denture.

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