Anti-falling denture lingual invisible clasp structure
By combining the shape memory alloy clasp structure with the anti-slip mechanism, the problems of unstable fixation and poor aesthetics of traditional clasps are solved, achieving stable installation and aesthetic results for dentures.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN ZHONGNAN DENTURE TECH CO LTD
- Filing Date
- 2025-05-16
- Publication Date
- 2026-06-26
AI Technical Summary
Traditional denture lingual clasps are not convenient for fixing the position of the retainer, resulting in decreased overall positional stability, affecting molar occlusion, and poor aesthetics.
The clasp structure, made of shape memory alloy, combines an anti-slip mechanism and an elastic layer. Through threaded connection and wear-resistant bump design, it achieves stable engagement between the clasp and the molar, and the elastic layer matches the gum color to improve aesthetics.
It achieves stable fixation between the clasp and the molar, enhances service life and aesthetics, reduces food residue entry and positional displacement, and improves stability and comfort during use.
Smart Images
Figure CN224403804U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of denture technology, specifically to a lingual invisible clasp structure for preventing dentures from falling out. Background Technology
[0002] Lingual clasps are important components in removable partial denture restorations used to enhance retention, stability, and support. They are usually placed on the lingual side of the abutment tooth. However, traditional clasps are not convenient for fixing the position of the retainer on one side, which leads to a decrease in the overall positional stability of the denture when the clasp is used to fix it.
[0003] To overcome the above-mentioned defects, the prior art (Chinese patent with announcement number CN221106086U, announcement date June 11, 2024) provides a clasp for denture installation, belonging to the field of denture installation technology. This clasp includes a denture and a pair of teeth. Each pair of teeth is surrounded by a clasp, and each pair of clasps has a fixing component at its bottom end and a connecting block at its bottom end. An installation ring is fixedly connected between the pair of connecting blocks. A base is installed at the top of the installation ring, connecting the base to the denture. The connecting block is L-shaped, with multiple round holes at its outer end. The clasp, consisting of the clasp arm tip, clasp body, and occlusal rest, is fixed to the patient's healthy teeth, thus fixing the denture connected to the installation ring to the gum line for lateral fixation. Then, the main connecting plate and the secondary connecting plate are connected by protrusions to prevent the denture from moving vertically, making it less likely to fall out when the patient chews, thus ensuring a more stable installation.
[0004] The aforementioned mechanism uses the cooperation of mounting rings and protrusions to fix the denture in position. However, in actual use, due to the inconsistent shape of the molars and the fact that the stop blocks affect the occlusion between the molars, discomfort may occur during subsequent use. Utility Model Content
[0005] The purpose of this invention is to provide a lingual invisible clasp structure for preventing dentures from falling out, in order to solve the problem mentioned in the background art that traditional clasps are not convenient for fixing the position of the limiting frame on one side during use, resulting in a decrease in the overall positional stability of the clasp when fixing the denture.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a lingual invisible retaining ring structure for preventing dentures from falling out, comprising a shape memory alloy and an anti-slip mechanism. The shape memory alloy has a mating groove on its side; a mating block is engaged inside the mating groove, and the shape memory alloy has an internal mounting mechanism for fixing the mating block. The mounting mechanism includes a threaded groove, which is located at the middle of the top of the shape memory alloy. A threaded rod matching the threaded groove is threaded inside the shape memory alloy. An elastic layer is sleeved on the outer side of the shape memory alloy, and an anti-slip area is provided on the inner side of the elastic layer to increase the contact area.
[0007] Furthermore, the bottom end of the threaded rod passes through the mating block and extends into the interior of the shape memory alloy, and the threaded rod and the mating block are connected by a thread. By passing through and, a threaded connection can be formed between and, thereby keeping the position of and unchanged, achieving stable installation.
[0008] Furthermore, a blocking block is fixedly connected to the top of the threaded rod, and the diameter of the blocking block is smaller than the diameter of the threaded groove. The top of the rod is fitted with a blocking block, which can block the pre-reserved top. By blocking the top, food residue can be prevented from entering the interior, thereby extending the service life during use.
[0009] Furthermore, a limiting plate is installed on the side of the docking block, and the side of the limiting plate is attached to the inside of the shape memory alloy.
[0010] Furthermore, the cross-section of the mating block is cross-shaped, and the thickness of the mating block is greater than the thickness of the shape memory alloy. Protruding locking blocks are provided on both the left and right sides, making the cross-section cross-shaped, thereby increasing the contact area for engagement and thus increasing the stability during engagement.
[0011] Furthermore, the anti-slip mechanism includes wear-resistant protrusions, which are disposed on the inner side of the elastic layer. A fixing groove is provided on the inner side of the elastic layer. The wear-resistant protrusions and the fixing groove are staggered. By deforming the shape of the wear-resistant protrusions and the fixing groove, the gaps remaining during the fit between the molar and the elastic layer can be reduced, and the contact area is increased by deformation.
[0012] Furthermore, the wear-resistant bumps are evenly distributed on the inner side of the elastic layer, and the wear-resistant bumps are symmetrical about the central axis of the shape memory alloy in the vertical direction.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. By passing the mating block through the mating groove, the mating block and the mating groove are kept in a locked state. A certain pressure is applied to the mating block, causing the limiting plate to deform and pass through the mating groove. The connecting rod is connected to the side of the mating block, so that the two retaining rings can be stably locked on the outside of the molar, allowing the retaining rings to be stably installed and fixed. At the same time, the shape and length of the connecting rod can be adjusted according to different installation requirements.
[0015] Furthermore, protruding locking blocks are provided on both the left and right sides of the mating block, making the cross-section of the mating block cross-shaped. This increases the contact area between the mating block and the mating groove, thereby increasing the stability of the mating block during engagement.
[0016] Furthermore, by passing the threaded rod through the shape memory alloy and the mating block, a threaded connection is formed between the threaded rod and the threaded groove, thus keeping the positions of the mating block and the shape memory alloy unchanged and achieving stable installation of the shape memory alloy. A shielding block is attached to the top of the threaded rod, which can shield the threaded groove reserved at the top of the shape memory alloy. By shielding the threaded groove, food residue can be prevented from entering the interior of the threaded groove, thereby extending the service life of the shape memory alloy.
[0017] 2. By applying an elastic layer to the outside of the shape memory alloy, the elastic layer can mask the color of the shape memory alloy, allowing the color of the shape memory alloy to be closer to the color of the gums during use. The shape memory alloy itself is low in height and fits the outside of the gums, thereby increasing the aesthetics of the shape memory alloy and the elastic layer during use.
[0018] Furthermore, by providing wear-resistant protrusions and fixing grooves on the inner side of the elastic layer, when the gums and molars come into contact with the elastic layer, the deformation of the shape of the wear-resistant protrusions and fixing grooves reduces the gaps left during contact. The increased contact area due to deformation also increases the wear resistance and anti-slip performance, effectively preventing the elastic layer and shape memory alloy from shifting position when they are engaged with the molars. Attached Figure Description
[0019] Figure 1 This is a front view structural diagram of the present utility model.
[0020] Figure 2 This is a frontal sectional view of the present invention.
[0021] Figure 3 This is a side view of the structure of this utility model.
[0022] Figure 4 This is a side sectional view of the present invention.
[0023] Figure 5 This is a schematic diagram of the installation mechanism of this utility model.
[0024] Figure 6 This utility model Figure 2 Enlarged structural diagram at point A in the middle.
[0025] In the diagram: 1. Shape memory alloy; 2. Elastic layer; 3. Wear-resistant protrusion; 4. Fixing groove; 5. Connecting block; 6. Limiting plate; 7. Threaded rod; 8. Threaded groove; 9. Connecting groove; 10. Blocking block. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] Example 1: As Figure 1-6 The technical solution shown addresses the problem of inconvenient disassembly and assembly between the two retaining rings and the connecting rod during use. This anti-dislodgement denture lingual invisible retaining ring structure discloses a disassembly and assembly mechanism, including a shape memory alloy 1 and an anti-slip mechanism. A mating groove 9 is provided on the side of the shape memory alloy 1. A mating block 5 is engaged inside the mating groove 9, and an installation mechanism for fixing the mating block 5 is provided inside the shape memory alloy 1. The installation mechanism includes a threaded groove 8, located at the middle of the top of the shape memory alloy 1. A threaded rod 7, matching the threaded groove 8, is threadedly connected inside the shape memory alloy 1. The bottom end of the threaded rod 7 passes through the mating block 5 and extends into the interior of the shape memory alloy 1, with a threaded connection between the threaded rod 7 and the mating block 5. A blocking block 10 is fixedly connected to the top of the threaded rod 7, and the diameter of the blocking block 10 is smaller than the diameter of the threaded groove 8. A limiting plate 6 is installed on the side of the mating block 5, and the side of the limiting plate 6 is attached to the inner side of the shape memory alloy 1. The cross-section of the mating block 5 is cross-shaped, and the thickness of the mating block 5 is greater than the thickness of the shape memory alloy 1.
[0028] In this example, by adjusting the inner side of the shape memory alloy 1 to resemble the shape of the user's molars, the shape memory alloy 1 can better engage with the outer side of the molars. The limiting plate 6 has a certain degree of elasticity, allowing the mating block 5 to pass through the mating groove 9, maintaining the engagement between the mating block 5 and the mating groove 9. Applying pressure to the mating block 5 causes the limiting plate 6 to deform and pass through the mating groove 9. The connecting rod connects to the side of the mating block 5, thereby allowing the two retaining rings to stably engage with the outer side of the molars, ensuring stable installation and fixation of the retaining rings. The shape and length of the connecting rod can be adjusted according to different installation requirements. Protruding retaining blocks are provided on both sides of the mating block 5, making the cross-section of the mating block 5 cross-shaped, increasing the contact area between the mating block 5 and the mating groove 9. This increases the stability of the mating block 5 during engagement; and the side of the limiting plate 6 fits against the inner side of the shape memory alloy 1, so that the position of the mating block 5 remains basically unchanged when it is engaged, facilitating the connection and fixation of the mating block 5 and the shape memory alloy 1 by means of the threaded rod 7; the threaded rod 7 passes through the shape memory alloy 1 and the mating block 5, so that the threaded rod 7 can form a threaded connection with the threaded groove 8, thereby keeping the position of the mating block 5 and the shape memory alloy 1 unchanged and achieving stable installation of the shape memory alloy 1; the top of the threaded rod 7 is fitted with a shielding block 10, which can shield the threaded groove 8 reserved at the top of the shape memory alloy 1, thereby preventing food residue from entering the interior of the threaded groove 8, thus extending the service life of the shape memory alloy 1.
[0029] Example 2: Figure 1-4 The technical solution shown addresses the issue of the clasp's color being too noticeable during use, affecting its aesthetics: the lingual invisible clasp structure for preventing denture loss discloses an elastic layer 2, with the shape memory alloy 1 having an elastic layer 2 fitted on its outer side.
[0030] In this example, the elastic layer 2 can mask the color of the shape memory alloy 1, so that the color of the shape memory alloy 1 can be closer to the color of the gum when in use. The shape memory alloy 1 itself is low in height and fits the outer side of the gum, thereby increasing the aesthetics of the shape memory alloy 1 and the elastic layer 2 when in use.
[0031] Example 3: Figure 1-4The technical solution shown addresses the problem of insufficient inner fit when the clasp is fitted on the outside of the molar: the lingual invisible clasp structure for the anti-dislodge denture discloses an anti-slip mechanism. The inner side of the elastic layer 2 is provided with an anti-slip mechanism to increase the contact area. The anti-slip mechanism includes wear-resistant protrusions 3, which are located on the inner side of the elastic layer 2. A fixing groove 4 is provided on the inner side of the elastic layer 2, and the wear-resistant protrusions 3 and the fixing groove 4 are staggered. The wear-resistant protrusions 3 are evenly distributed on the inner side of the elastic layer 2, and the wear-resistant protrusions 3 are symmetrical about the vertical central axis of the shape memory alloy 1.
[0032] In this example, by providing wear-resistant protrusions 3 and fixing grooves 4 on the inner side of the elastic layer 2, when the gums and molars come into contact with the elastic layer 2, the deformation of the shape of the wear-resistant protrusions 3 and fixing grooves 4 reduces the gaps left during contact. Furthermore, the increased contact area due to deformation enhances the wear-resistant and anti-slip properties, effectively preventing the elastic layer 2 and shape memory alloy 1 from shifting position when they are engaged with the molars.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A lingual invisible clasp structure for preventing dentures from falling out, comprising a shape memory alloy (1) and an anti-slip mechanism, wherein the shape memory alloy (1) has a mating groove (9) on its side. Its features are: The docking groove (9) is internally engaged with a docking block (5), and the shape memory alloy (1) is internally provided with an installation mechanism for fixing the docking block (5). The installation mechanism includes a threaded groove (8), and the threaded groove (8) is located at the middle position of the top of the shape memory alloy (1). The shape memory alloy (1) is internally threaded with a threaded rod (7) that matches the threaded groove (8). The shape memory alloy (1) is covered with an elastic layer (2) on the outside, and the inner side of the elastic layer (2) is provided with an anti-slip area to increase the contact area.
2. The lingual invisible clasp structure for preventing denture fallout according to claim 1, characterized in that: The bottom end of the threaded rod (7) passes through the mating block (5) and extends into the interior of the shape memory alloy (1), and the threaded rod (7) and the mating block (5) are connected by threads.
3. The lingual invisible clasp structure for preventing denture fallout according to claim 2, characterized in that: The top end of the threaded rod (7) is fixedly connected to a blocking block (10), and the diameter of the blocking block (10) is smaller than the diameter of the threaded groove (8).
4. The lingual invisible clasp structure for preventing denture fallout according to claim 3, characterized in that: The side of the docking block (5) is fitted with a limiting plate (6), and the side of the limiting plate (6) is attached to the inside of the shape memory alloy (1).
5. The lingual invisible clasp structure for preventing denture fallout according to claim 4, characterized in that: The cross-section of the docking block (5) is cross-shaped, and the thickness of the docking block (5) is greater than the thickness of the shape memory alloy (1).
6. The lingual invisible clasp structure for preventing denture fallout according to claim 1, characterized in that: The anti-slip mechanism includes a wear-resistant protrusion (3), and the wear-resistant protrusion (3) is disposed on the inner side of the elastic layer (2). A fixing groove (4) is provided on the inner side of the elastic layer (2), and the wear-resistant protrusion (3) and the fixing groove (4) are staggered.
7. The lingual invisible clasp structure for preventing denture fallout according to claim 6, characterized in that: The wear-resistant bumps (3) are evenly distributed on the inner side of the elastic layer (2), and the wear-resistant bumps (3) are symmetrical about the vertical central axis of the shape memory alloy (1).