Removable partial denture

Abstract

The utility model provides a removable partial denture. The removable partial denture comprises a base plate tightly attached to the bottom of an oral cavity; the three-arm clamping ring and the combined clamping crown respectively extend towards one side of the base plate; the y-shaped buckle extends towards the other side of the base plate; the false tooth part and the y-shaped buckle are arranged on the same side, and the false tooth part is tightly attached to the edge of the base plate. According to the denture base, the static friction coefficient of the denture base and the oral mucosa is increased through the base structure precisely attached to the anatomical form of the bottom of the oral cavity; meanwhile, a three-arm clamping ring, a combined clamping crown composite fixing system and a y-shaped buckle device are arranged on the two sides of the base respectively, a three-dimensional space positioning and fixing mechanism is constructed, and the problems that in the prior art, an anti-skid rubber pad and an anti-abrasion rubber pad can affect the matching property of the tooth hook and the gum contour, and local compression discomfort can be caused are solved.

Description

Technical Field

[0001] This utility model relates to the technical field of dentures, and more particularly to a removable partial denture. Background Technology

[0002] Removable partial dentures, also known as removable dentures, are oral prostheses that patients can remove and insert themselves, primarily used to restore partial tooth loss. They utilize natural teeth, the mucosa and bone tissue beneath the denture base for support, are retained by retainers (such as clasps) and the denture base, and use artificial teeth to restore the shape and function of the missing teeth.

[0003] The advantage of this type of denture lies in its ease of cleaning and maintenance; patients can remove it themselves for cleaning, which helps maintain oral hygiene.

[0004] However, in actual use, due to their ease of disassembly, gaps exist between the denture hooks and natural teeth, causing the hooks to wobble between the teeth, affecting the user's chewing and pronunciation. Furthermore, each time the denture is removed, it needs to be reinstalled and repositioned. Due to the gaps, the wearer needs to fine-tune the position of the denture after each installation to find the optimal comfortable position, which reduces the convenience of denture installation. Utility Model Content

[0005] The purpose of this invention is to solve the problem that gaps between dentures and teeth in the prior art can affect a user's chewing and pronunciation, and also reduce the convenience of denture installation.

[0006] Anti-slip rubber pads and anti-abrasion rubber pads can affect the fit between the dental hook and the jawbone, causing localized pressure and discomfort.

[0007] To achieve the above objectives, this application proposes a removable partial denture, comprising: a base that fits tightly against the floor of the oral cavity, the base including: a support plate that fits against the floor of the oral cavity; a locking portion disposed on the support plate near the edge of the denture portion; the locking portion including: a locking groove disposed in the cavity of the locking portion and opening towards the side wall of the denture portion; a limiting groove penetrating the top surface of the locking portion and the locking groove; a three-arm clasp and a combined clasp extending to one side of the base; a Y-shaped buckle extending to the other side of the base; and a denture portion disposed at the edge of the base, the denture portion including: a denture for filling the patient's missing teeth; a support base covering and supporting the denture; and an insertion portion connecting the support base and cooperating with the locking portion for installation; the insertion portion including: a mounting groove penetrating the top surface of the insertion portion; a spring disposed on one side of the mounting groove and welded to the bottom surface of the mounting groove; and a limiting buckle mounted on the other side of the mounting groove by a pin and pressing against the top surface of the spring.

[0008] The removable partial denture of this application achieves rapid insertion and removal of the denture by having a locking part on the denture base that engages with the insertion part of the denture. As the insertion part gradually inserts into the locking groove, a limiting buckle compresses a spring until it reaches the bottom of the limiting groove. The spring then releases, pushing the limiting buckle out into the limiting groove, thus locking the denture part to the denture base. When disassembly is required, pressing the limiting buckle allows the denture part to be pulled out, enabling separate cleaning of the denture part without affecting the positioning device. This solves the problem in existing technologies where gaps between the denture and teeth affect the user's chewing and pronunciation, and also reduce the convenience of denture installation.

[0009] Furthermore, in order to reduce friction between the limiting buckle and the wearer's tongue, the top surface of the limiting buckle is designed with a rounded transition surface.

[0010] Furthermore, in order to improve the ease of denture installation by using the Y-shaped buckle as the initial positioning base, the Y-shaped buckle is arranged on the same side as the denture and fits tightly against the edge of the denture base.

[0011] As an improvement to the three-arm clasp described in this application, in order to fix the three-arm clasp to the abutment tooth, the three-arm clasp includes: a branch arm that is connected to the base and extends downward; and a snap-fit ​​arm that connects to the branch arm and fits against the two side walls of the abutment tooth.

[0012] As an improvement to the aforementioned combined crown in this application, in order to fix the combined crown to the abutment tooth, the combined crown includes: a crown branch arm that is connected to the base and extends upward; and a first crown clip and a second crown clip symmetrically distributed on the upper and lower sides of the crown branch arm.

[0013] Furthermore, to increase the ease of installation of the combined clip, the openings of the first clip and the second clip are opposite to each other.

[0014] As an improvement of the Y-shaped buckle described in this application, the Y-shaped buckle includes: a Y-shaped buckle branch arm that is connected to the base and extends upward; and a Y-shaped buckle arm that is connected to the end of the Y-shaped buckle branch arm and is adjacent to the top of the denture and is distributed left and right.

[0015] Furthermore, in order to shorten the mechanical arm of the denture by using the adjacent tooth as a fulcrum, thereby reducing the torque borne by the abutment tooth, the Y-shaped buckle is engaged with the abutment tooth adjacent to the denture portion.

[0016] Furthermore, in order to make the Y-shaped clips and the second crown clips symmetrically distributed on both sides of the denture base to improve the stability of the denture, the Y-shaped clips and the second crown clips are respectively fastened to the same abutment teeth on both sides.

[0017] Furthermore, in order to prevent longitudinal displacement of the denture and restore the occlusal relationship, an occlusal rest is provided between the three-arm clasp and the combined crown, and the occlusal rest extends toward the occlusal surface of the abutment tooth.

[0018] The beneficial effects of this application are as follows:

[0019] 1. The removable partial denture of this application achieves rapid insertion and removal of the denture by having a locking part on the denture base that engages with the insertion part of the denture. As the insertion part gradually inserts into the locking groove, a limiting buckle compresses a spring until it reaches the bottom of the limiting groove. The spring then releases, pushing the limiting buckle out into the limiting groove, thus locking the denture to the denture base. When disassembly is required, the denture can be pulled out by pressing the limiting buckle. The denture can then be cleaned separately without affecting the positioning device. This solves the problem in the prior art where gaps between the denture and teeth affect the user's chewing and pronunciation, and also reduce the convenience of denture installation.

[0020] 2. The removable partial denture proposed in this application employs a dual stabilization mechanism design: Firstly, the denture base structure, precisely conforming to the anatomical morphology of the oral cavity floor, significantly improves the static friction coefficient between the denture base and the oral mucosa; secondly, a three-arm clasp-combined crown composite fixation system and a Y-shaped clasp device are respectively configured on both sides of the denture base to construct a three-dimensional spatial positioning and fixation mechanism. This combined design achieves a dual stabilization effect: on the one hand, it utilizes the dynamic downward pressure generated by the natural physiological activity of the tongue to strengthen the mechanical fit between the denture base and the soft tissue of the oral cavity floor; on the other hand, it ensures the precise positioning of the denture in the sagittal, coronal, and horizontal planes through a three-point mechanical clasp structure. Compared to the misfit between the anti-slip rubber components and the alveolar contour in traditional technical solutions and the resulting local pressure pain, this design solves the problem in existing technologies where the anti-slip rubber pads and anti-abrasion rubber pads affect the fit between the dental hook and the alveolar contour, causing local pressure discomfort.

[0021] 3. The denture of this application, through its reasonable layout, further enhances the stability of the denture during fixation and the convenience of disassembly. On the one hand, the first and second crown clips are symmetrically distributed on the upper and lower sides of the crown branch arm, and their openings are opposite to each other, forming a snap-fit ​​with the axial surface of the abutment tooth. The wearer only needs to align the crown branch arm with the adjacent abutment tooth gap to achieve the installation of the combined crown. On the other hand, the Y-shaped clip and the second crown clip are respectively snapped onto the same abutment teeth on both sides, forming a cross-retention of the denture and improving stability.

[0022] 4. The Y-shaped buckle 4 of this application is engaged with the abutment tooth adjacent to the denture part 5, forming support and retention for the denture part 5. At the same time, the mechanical arm of the denture is shortened by using the adjacent tooth as a fulcrum, thereby reducing the torque borne by the abutment tooth.

[0023] 5. The occlusal rest provided in this application serves two purposes: firstly, it prevents longitudinal displacement of the denture, provides support, and transmits occlusal forces towards the abutment teeth, thus stabilizing the denture; secondly, it also prevents food impaction, and the enlarged occlusal rest is used to restore malocclusion. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a removable partial denture according to an embodiment of this application;

[0026] Figure 2 This is a schematic diagram illustrating the interaction between a removable partial denture and natural teeth in an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the installation of the snap-fit ​​part and the plug-in part in the embodiments of this application.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Base; 11. Tray; 12. Snap-fit ​​part; 121. Snap-fit ​​groove; 122. Limiting groove;

[0030] 2. Three-arm retaining ring; 21. Branch arm; 22. Buckle arm;

[0031] 3. Joint crown; 31. Crown branch arm; 32. First crown buckle; 33. Second crown buckle;

[0032] 4. Y-shaped buckle; 41. Y-shaped buckle branch arm; 42. Y-shaped buckle arm;

[0033] 5. Denture section; 51. Denture; 52. Support base; 53. Insertion part; 531. Mounting slot; 532. Spring; 533. Limiting buckle;

[0034] 6. Occlusal rest. Detailed Implementation

[0035] The following will be combined with the appendix Figures 1-3 The embodiments of the technical solutions in this application are described in detail. The following embodiments are only used to more clearly illustrate the technical solutions of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application. Furthermore, the technical features involved in the various embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0036] like Figure 1 , Figure 3 As shown, the edge of the tray 11 of the base 1 extends to form a snap-fit ​​portion 12. The inner cavity of the snap-fit ​​portion 12 has a snap-fit ​​groove 121 facing the side wall of the denture portion 5, and the top of the snap-fit ​​groove 121 passes through a limiting groove 122. The outer contour of the insertion portion 53 of the denture portion 5 is precisely fitted with the inner wall of the snap-fit ​​groove 121. The top surface of the insertion portion 53 has a mounting groove 531, and a built-in spring 532 and a limiting buckle 533 hinged by a pin.

[0037] Denture 51, representing the patient's missing tooth, is mounted on support 52. During the installation of denture 5, the insertion part 53 is inserted axially along the locking groove 121, and the limiting buckle 533 is compressed by the inner wall of the locking part 12, compressing the spring 532. When the insertion part 53 is fully inserted, the limiting buckle 533 moves to the corresponding position in the limiting groove 122, and the spring 532 releases its elastic potential energy to push the limiting buckle 533 to rotate and pop out, forming a mechanical interlock between its top arc transition surface and the limiting groove 122. During disassembly, the limiting buckle 533 is pressed with a tool to disengage it from the limiting groove 122, thus achieving rapid separation of denture 5. This structure achieves a stable connection between denture 5 and base 1 through a purely mechanical locking method, avoiding the wobbling problem caused by gaps in traditional dentures.

[0038] like Figures 1-2 This illustration depicts a removable partial denture according to this application. The removable partial denture includes a base system, a clasp system, a denture system, and an auxiliary support system. The base 1 is made of thermosetting resin material, and its bottom fits closely to the anatomical shape of the patient's oral cavity floor. The edge of the base 1 extends to the outer side of the alveolar ridge crest, forming comprehensive support for the oral cavity floor.

[0039] The locking system includes a three-arm retaining ring 2, a combined retaining crown 3, and a Y-shaped buckle 4.

[0040] Specifically, the three-arm clasp 2 is located on one side of the base 1, including a branch arm 21 and a locking arm 22. One end of the branch arm 21 is connected to the base 1, and the other end extends downward; the locking arm 22 is connected to the end of the branch arm 21 and fits against the two side walls of the abutment tooth to form a retaining position for the abutment tooth.

[0041] The combined crown 3 is also located on the aforementioned side of the base 1, including a crown branch arm 31, a first crown clip 32, and a second crown clip 33. One end of the crown branch arm 31 is connected to the base 1, and the other end extends upward; the first crown clip 32 and the second crown clip 33 are symmetrically distributed on the upper and lower sides of the crown branch arm 31, and their openings are opposite to each other, respectively forming a snap-fit ​​with the axial surface of the abutment tooth.

[0042] A Y-shaped clip 4 is located on the other side of the denture base 1, including a Y-shaped clip branch arm 41 and a Y-shaped clip arm 42. One end of the Y-shaped clip branch arm 41 is connected to the denture base 1, and the other end extends upward; the Y-shaped clip arm 42 is connected to the end of the Y-shaped clip branch arm 41 and is distributed left and right adjacent to the top of the denture part 5. The Y-shaped clip 4 is engaged with the abutment tooth adjacent to the denture part 5, forming support and retention for the denture part 5. At the same time, it shortens the mechanical arm length of the denture by using the adjacent tooth as a fulcrum, thereby reducing the torsional force borne by the abutment tooth.

[0043] In addition, the Y-shaped clip 4 and the second crown clip 33 are respectively fastened to the same abutment teeth on both sides to form cross retention of the denture.

[0044] Furthermore, the denture portion 5 is positioned on the same side as the Y-shaped clip 4 and fits snugly against the edge of the base 1. The shape of the denture portion 5 matches the shape of the patient's missing teeth to restore the patient's chewing function and aesthetics.

[0045] Furthermore, an occlusal rest 6 is provided between the three-arm clasp 2 and the combined clasp 3. The occlusal rest 6 extends towards the occlusal surface of the abutment tooth and contacts the occlusal surface of the abutment tooth. The occlusal rest 6 is used to bear the occlusal force and transmit the occlusal force to the abutment tooth, thereby reducing the torsional force borne by the abutment tooth.

[0046] The removable partial denture provided in this embodiment achieves stable retention of the denture through a close fit between the denture base and the floor of the oral cavity, as well as multi-point engagement of the clasp system. Furthermore, the stability of the denture is further enhanced by the synergistic design of the denture section and the Y-shaped clasp, along with the auxiliary support of the occlusal rest.

[0047] As a preferred option, the removable partial denture of this application is made of polyetheretherketone (PEEK). Compared with metal materials, removable partial dentures made of PEEK material are closer in color to teeth, lightweight, and odorless.

[0048] As a preferred embodiment, the removable partial denture of this application is digitally acquired by a high-precision model scanner (D2000, 3Shape) to obtain a digital dental model, and personalized design is carried out using computer-aided design (CAD) software. The removable partial denture is then fabricated by cutting PEEK material using a five-axis CNC machine tool.

[0049] In the description of the embodiments of this application, the technical terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0050] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "set," "equipped with," "connected," and "installed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A removable partial denture, characterized in that, include: A denture base (1) that fits tightly against the floor of the mouth; a three-arm clasp (2) and a combined crown (3) extending to one side of the denture base (1); a Y-shaped buckle (4) extending to the other side of the denture base (1); and a denture portion (5) located at the edge of the denture base (1). The base (1) includes: a tray (11) that fits against the floor of the oral cavity; a snap-fit ​​portion (12) disposed on the tray (11) near the edge of the denture part (5); the snap-fit ​​portion (12) includes: a snap-fit ​​groove (121) disposed in the inner cavity of the snap-fit ​​portion (12) and open toward the side wall of the denture part (5); and a limiting groove (122) penetrating the top surface of the snap-fit ​​portion (12) and the snap-fit ​​groove (121). The denture part (5) includes: a denture (51) to complete the missing teeth of the patient; a support base (52) covering and supporting the denture (51); a plug part (53) connecting the support base (52) and cooperating with the snap-fit ​​part (12); the plug part (53) includes: a mounting groove (531) penetrating the top surface of the plug part (53); a spring (532) disposed on one side of the mounting groove (531) and welded to the bottom surface of the mounting groove (531); and a limiting buckle (533) mounted on the other side of the mounting groove (531) by a pin and pressing against the top surface of the spring (532).

2. The removable partial denture according to claim 1, characterized in that, The top surface of the limiting buckle (533) is designed with a rounded transition surface.

3. The removable partial denture according to claim 1, characterized in that, The Y-shaped buckle (4) is arranged on the same side as the denture part (5) and fits tightly against the edge of the base (1).

4. The removable partial denture according to claim 1, characterized in that, The three-arm clasp (2) includes: a branch arm (21) that is connected to the base (1) and extends downward; and a snap arm (22) that connects to the branch arm (21) and fits against the two side walls of the abutment tooth.

5. The removable partial denture according to claim 1, characterized in that, The combined crown (3) includes: a crown branch arm (31) that is connected to the base (1) and extends upward; and a first crown buckle (32) and a second crown buckle (33) symmetrically distributed on the upper and lower sides of the crown branch arm (31).

6. The removable partial denture according to claim 5, characterized in that, The openings of the first crown buckle (32) and the second crown buckle (33) are opposite to each other.

7. The removable partial denture according to claim 1, characterized in that, The Y-shaped buckle (4) includes: a Y-shaped buckle branch arm (41) that is connected to the base (1) and extends upward; and a Y-shaped buckle arm (42) that is connected to the end of the Y-shaped buckle branch arm (41) and adjacent to the top of the denture (5) and is distributed in a left-right manner.

8. The removable partial denture according to claim 7, characterized in that, The Y-shaped buckle (4) is engaged with the abutment tooth adjacent to the denture part (5).

9. The removable partial denture according to claim 5, characterized in that, The Y-shaped buckle (4) and the second crown buckle (33) are respectively fastened to the same abutment teeth on both sides.

10. The removable partial denture according to claim 1, characterized in that, An occlusal rest (6) is provided between the three-arm clasp (2) and the combined clasp (3), and the occlusal rest (6) extends toward the occlusal surface of the abutment tooth.

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