Phalanx implant prosthesis

Abstract

The utility model belongs to the technical field of medical equipment, and discloses a phalanx implantation prosthesis. The phalanx implantation prosthesis comprises an abutment and a cushion block, the abutment is fixedly connected to the metatarsal bone and made of a titanium alloy material, and the cushion block is fixedly arranged on the abutment, fixedly connected to the phalanx and made of a ceramic material. According to the phalanx implantation prosthesis, the base table made of the titanium alloy material can bear the load of a fracture position, so that the pressure on surrounding bones and soft tissues is reduced, meanwhile, the fracture healing effect is improved, and the cushion block made of the ceramic material is used for being in direct contact with the phalanx, so that the phalanx implantation prosthesis is convenient to use. Due to the fact that ceramic has lower chemical reactivity and better corrosion resistance compared with titanium alloy, the ceramic can interact with the phalanx more friendly, higher biocompatibility and abrasion resistance are achieved, the postoperative experience feeling of a user can be effectively improved, the abrasion loss of the phalanx implantation prosthesis is lower, the service life is longer, and the phalanx implantation prosthesis is suitable for being used for medical treatment. And the secondary operation risk of the user is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a toe bone implant prosthesis. Background Art

[0002] The foot includes tarsal bones, metatarsal bones and phalanges. The metatarsal bones are located in the middle of the foot and combine with the phalanges to form the metatarsophalangeal joint. When the metatarsophalangeal joint needs to be repaired due to fractures or other conditions, hollow fusion screws and other methods can often be used to fix the metatarsal bones and phalanges. Generally, after about six to eight weeks of fixation, the fracture ends can heal, and corresponding functional exercises can be gradually performed to facilitate the recovery of metatarsal function.

[0003] During use, the head of the hollow fusion screw with a self-tapping groove is inserted into the metatarsal bone for fixation, and the tail with an elastic clip is inserted into the phalanx. The side of the elastic clip is provided with anti-slip teeth to fix the elastic clip into the phalanx. In this way, the metatarsal bone and phalanx can be connected as one for fusion. The operation is simple, stable and low-cost, which reduces the difficulty of the operation and reduces the trauma and pain of the patient. However, the above-mentioned hollow fusion screw is made entirely of titanium alloy, which affects the compatibility and wear resistance between the phalanx and the hollow fusion screw, not only reducing the user's postoperative experience, but also increasing the risk of secondary surgery.

[0004] Based on the above, there is an urgent need for a toe bone implant prosthesis to solve the technical problems existing in the prior art. Utility Model Content

[0005] The purpose of the utility model is to provide a toe bone implant prosthesis, which can improve the user's postoperative experience and safety and reduce the user's risk of secondary surgery.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The phalanx implant prosthesis comprises a base and a pad. The base is fixedly connected to the metatarsal bone and is made of titanium alloy. The pad is fixedly arranged on the base and is fixedly connected to the phalanx and is made of ceramic.

[0008] Preferably, the end surface of the pad facing the phalanx is provided with a recess, and the surface of the recess is adapted to the shape of the end surface of the phalanx.

[0009] Preferably, a slot is provided at one end of the base facing the cushion block, and the cushion block is limitedly disposed in the slot.

[0010] Preferably, the toe bone implant prosthesis also includes a limiting structure, which is arranged on the base. The limiting structure is configured as follows: when the pad is arranged on the base, the limiting structure can clamp the pad on the base to limit the movement of the pad along the axial direction of the base.

[0011] Preferably, the limiting structure includes a main body and a limiting part, the main body is fixed on the base, the limiting part is arranged around the axis of the main body and protrudes from the peripheral side wall of the main body, and the limiting part is pressed against the pad.

[0012] Preferably, a first groove is provided on the base, and a second groove is provided on the pad. The first groove and the second groove are connected together to form an accommodating space. When the main body is fixed on the base, the limiting part is embedded in the accommodating space and pressed against the bottom of the second groove.

[0013] Preferably, a column is protruding from the bottom of the first sink, and the main body has an insertion hole. The main body is plugged into the column through the insertion hole and can rotate around the axis of the column.

[0014] The main body can control the limiting part to rotate around the axis of the main body so that the limiting part has an avoidance state and a locking state. When the limiting part is in the avoidance state, the horizontal projection surface of the limiting part coincides with the horizontal projection surface of the first sink groove. When the limiting part is in the locking state, the limiting part can be pressed against the bottom of the second sink groove.

[0015] Preferably, the horizontal cross-section of the limiting portion is semicircular, and the cross-section of the limiting portion is adapted to the cross-section of the second sink, so that when the limiting portion is in the locked state, the arc surface of the limiting portion can be fitted and connected to the inner wall of the second sink.

[0016] Preferably, along the circumferential direction of the spacer, the phalangeal implant prosthesis includes a plurality of the limiting structures arranged at equal intervals.

[0017] Preferably, a threaded connection portion is protruded from the end surface of the base away from the pad, and the threaded connection portion is threadedly connected to the metatarsal bone.

[0018] The beneficial effects of the phalangeal implant prosthesis provided by the present invention are as follows: in the phalangeal implant prosthesis, the base made of titanium alloy can withstand the load at the fracture site, thereby reducing the pressure on the surrounding bones and soft tissues, and also helping to improve the fracture healing effect. The ceramic pad is used for direct contact with the phalanges. Since ceramics have lower chemical reactivity and better corrosion resistance than titanium alloys, they can interact more friendly with the phalanges, thereby having higher biocompatibility and wear resistance, which can effectively improve the user's postoperative experience. The phalangeal implant prosthesis has lower wear and longer service life, reducing the risk of secondary surgery for the user. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the assembly of a phalangeal bone implant prosthesis provided by an embodiment of the present utility model at a metatarsophalangeal joint fracture;

[0020] Figure 2 This is a schematic structural diagram of a toe bone implant prosthesis provided by an embodiment of the present utility model;

[0021] Figure 3 This is an exploded view of a toe bone implant prosthesis provided by an embodiment of the present utility model;

[0022] Figure 4 This is a front view of the toe bone implant prosthesis provided by an embodiment of the utility model, with the limiting portion in a locked state;

[0023] Figure 5 It is along Figure 4 Cross-section at AA in the middle;

[0024] Figure 6 It is along Figure 4 Cross-section at the middle BB;

[0025] Figure 7 yes Figure 6 A partial enlarged view of point C in the middle;

[0026] Figure 8 It is a structural diagram of the limiting structure provided by an embodiment of the present utility model;

[0027] Figure 9 This is a front view of the toe bone implant prosthesis provided by an embodiment of the utility model, with the limiting portion in the avoidance state.

[0028] In the picture:

[0029] 100, metatarsal bones; 200, phalanges; 300, phalanges with prosthetic implants;

[0030] 310, base; 3101, slot; 3102, first sink; 311, threaded connection; 312, column;

[0031] 320. Pad; 3201. Second sinking groove; 321. Recess;

[0032] 330. Limiting structure; 331. Main body; 3311. Insertion hole; 332. Limiting portion; 333. Flanging portion. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0034] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0036] In the description of this embodiment, terms such as "upper," "lower," "right," and "left" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0037] In order to solve the problem that the conventional art uses a hollow fusion screw made of titanium alloy to fix the metatarsal bone 100 and the phalanx 200, which reduces the user's postoperative experience and increases the risk of secondary surgery for the user, the present invention provides a phalanx implant prosthesis 300, which is mainly aimed at the problem that the metatarsophalangeal joint needs to be repaired due to fractures, etc. Figure 1 、 Figure 2 As shown, it includes a base 310 and a pad 320, wherein the base 310 is fixedly connected to the metatarsal 100, and the base 310 is made of titanium alloy; the pad 320 is fixedly set on the base 310 and fixedly connected to the phalanx 200, and the pad 320 is made of ceramic material.

[0038] The above-mentioned phalangeal implant prosthesis 300, the titanium alloy base 310 can withstand the load at the fracture site, thereby reducing the pressure on the surrounding bones and soft tissues, and also helps to improve the fracture healing effect. The ceramic pad 320 is used to directly contact the phalange 200. Since ceramic has lower chemical reactivity and better corrosion resistance than titanium alloy, it can interact with the phalange 200 more friendly, thereby having higher biocompatibility and wear resistance, which can effectively improve the user's postoperative experience. The phalangeal implant prosthesis 300 has lower wear and longer service life, reducing the risk of secondary surgery for the user.

[0039] refer to Figure 2 As shown, in this embodiment, a threaded connection portion 311 is provided on the end surface of the abutment 310 away from the pad 320. The threaded connection portion 311 is threadedly connected to the metatarsal bone 100. The threaded connection portion 311 can reduce the risk of the abutment 310 being dislodged during the user's dynamic healing process, thereby achieving the purpose of stably connecting the abutment 310 to the metatarsal bone 100. Furthermore, the threaded connection portion 311 has a conical structure. When the threaded connection portion 311 is screwed into the metatarsal bone 100, the conical design can make the connection between the abutment 310 and the metatarsal bone 100 tighter and more secure, further reducing the possibility of loosening.

[0040] refer to Figure 2 、 Figure 3 As shown, in this embodiment, a slot 3101 is provided on one end of the base 310 facing the pad 320, and the pad 320 is limited in the slot 3101, so that the base 310 can wrap the pad 320 through the action of the slot 3101, thereby preventing the pad 320 from protruding from the base 310, thereby reducing the occupied space area of ​​the entire implant prosthesis, thereby reducing the distance between the metatarsal 100 and the phalanx 200, and facilitating the connection between the two and the rapid healing of the fracture.

[0041] Further, refer to Figure 4As shown, the cross-section of the base 310 is circular, which can reduce the friction and wear between the toe bone implant prosthesis 300 and the surrounding soft tissue, thereby improving the comfort of the user.

[0042] refer to Figure 5 As shown, the end face of the pad 320 facing the phalanx 200 is provided with a recess 321, and the surface of the recess 321 is adapted to the shape of the end face of the phalanx 200 to reduce damage to the phalanx 200 and the user's foreign body sensation, thereby further improving the user's postoperative use experience.

[0043] Optionally, in this embodiment, the phalangeal implant prosthesis 300 further includes a limiting structure 330, which is disposed on the base 310. When the pad 320 is disposed on the base 310, the limiting structure 330 can clamp the pad 320 on the base 310 to limit the pad 320 from moving along the axis of the base 310, thereby effectively improving the connection stability between the pad 320 and the base 310, as well as the safety and reliability of the phalangeal implant prosthesis 300, and further reducing the risk of secondary surgery for the user. Specifically, as Figure 6 As shown, the limiting structure 330 includes a main body 331 and a limiting portion 332. The main body 331 is fixedly arranged on the base 310. The limiting portion 332 is arranged around the axis of the main body 331 and protrudes from the peripheral side wall of the main body 331. The limiting portion 332 is pressed against the cushion block 320, so that the limiting structure 330 achieves the purpose of limiting and pressing the cushion block 320 into the slot 3101 through the limiting portion 332.

[0044] Preferably, the phalangeal implant prosthesis 300 includes four equally spaced limiting structures 330 along the circumferential direction of the pad 320 to comprehensively strengthen the limiting effect on the pad 320 and meet the requirement for stable installation of the pad 320 on the base 310. Of course, in other embodiments, two, three, five, or even more limiting structures 330 may be provided to achieve varying degrees of limiting effect on the pad 320, and the present invention is not limited thereto.

[0045] Further, refer to Figure 7As shown, the base 310 is further provided with a first recessed groove 3102, and the pad 320 is provided with a second recessed groove 3201. The first recessed groove 3102 and the second recessed groove 3201 cooperate and connect to form an accommodating space. When the main body 331 is fixedly mounted on the base 310, the limiting portion 332 is embedded in the accommodating space and pressed against the bottom of the second recessed groove 3201 to suppress the pad 320 and prevent it from moving. The provision of the aforementioned accommodating space allows the limiting portion 332 to be embedded in the phalangeal implant 300 without protruding or being exposed, thereby ensuring that the surface of the end of the phalangeal implant 300 facing the phalange 200 is flat, with no protruding structures affecting the movement of the phalange 200, thereby further enhancing the user experience.

[0046] Furthermore, a column 312 is provided on the bottom of the first sink 3102, and the main body 331 has a socket 3311. The main body 331 is plugged into the column 312 through the socket 3311 and can rotate around the axis of the column 312, so that after the limiting structure 330 is installed on the base 310, it can also rotate on the base 310 around the axis of the column 312. For example, in this example, the limiting structure 330 adopts rivets, referring to Figure 8 As shown, the rivet also includes a flange portion 333 located at the bottom of the main body 331. When the rivet is inserted into the column 312, pressure is applied to the rivet by the riveting equipment so that the bottom of the rivet can expand outward to form the above-mentioned flange portion 333, thereby ensuring that the rivet is firmly fixed on the column 312. Figure 4 、 Figure 9 As shown, when the pad 320 is not installed in the slot 3101, the limiting portion 332 is rotated to the avoidance state by the main body 331. At this time, the horizontal projection surface of the limiting portion 332 coincides with the horizontal projection surface of the first sink groove 3102, that is, the limiting portion 332 is now completely accommodated in the first sink groove 3102, which can avoid affecting the installation of the pad 320; when the pad 320 is installed in the slot 3101, the limiting portion 332 can be driven by the main body 331 and rotated to the locked state, that is, at this time the limiting portion 332 is pressed on the bottom of the second sink groove 3201, thereby clamping the pad 320.

[0047] By first installing the limiting structure 330 on the base 310, then installing the pad 320, and finally rotating the limiting structure 330 so that it can clamp the pad 320, the operation process is simpler than first installing the pad 320 and then installing the limiting structure 330, which helps to improve the assembly accuracy of the pad 320 and reduce the need for subsequent adjustments, thereby improving the overall installation efficiency and installation quality of the toe implant prosthesis 300.

[0048] Furthermore, in this embodiment, the horizontal cross-sectional shape of the limiting portion 332 is semicircular, and the cross-sectional shape of the limiting portion 332 is adapted to the cross-sectional shape of the second groove 3201, so that when the limiting portion 332 is in a locked state, the arc surface of the limiting portion 332 can be fitly connected with the inner wall of the second groove 3201, thereby increasing the contact area between the limiting portion 332 and the pad 320, thereby increasing the area of ​​the limiting portion 332 horizontally projected into the second groove 3201, thereby increasing the pressing effect of the limiting portion 332 on the pad 320, and making the locking effect of the limiting portion 332 on the pad 320 stronger.

[0049] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0050] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A toe bone implant prosthesis, characterized in that: The invention comprises a base (310) and a pad (320), wherein the base (310) is fixedly connected to the metatarsal bone (100), and the base (310) is made of a titanium alloy material; the pad (320) is fixedly arranged on the base (310), and the pad (320) is fixedly connected to the phalanx (200), and the pad (320) is made of a ceramic material.

2. The toe bone implant prosthesis according to claim 1, characterized in that: The end surface of the pad (320) facing the phalanx (200) is provided with a recess (321), and the surface of the recess (321) is adapted to the shape of the end surface of the phalanx (200).

3. The toe bone implant prosthesis according to claim 1, characterized in that: A slot (3101) is provided at one end of the base (310) facing the cushion block (320), and the cushion block (320) is positioned in the slot (3101).

4. The toe bone implant prosthesis according to claim 3, characterized in that: The toe bone implant prosthesis (300) further includes a limiting structure (330), which is arranged on the base (310). The limiting structure (330) is configured as follows: when the pad (320) is arranged on the base (310), the limiting structure (330) can clamp the pad (320) on the base (310) to limit the pad (320) from moving along the axial direction of the base (310).

5. The toe bone implant prosthesis according to claim 4, characterized in that: The limiting structure (330) includes a main body (331) and a limiting part (332), wherein the main body (331) is fixed on the base (310), and the limiting part (332) is arranged around the axis of the main body (331) and protrudes from the peripheral side wall of the main body (331), and the limiting part (332) is pressed against the pad (320).

6. The toe bone implant prosthesis according to claim 5, characterized in that: The base (310) is further provided with a first groove (3102), and the cushion block (320) is provided with a second groove (3201). The first groove (3102) and the second groove (3201) are connected together to form a receiving space. When the main body (331) is fixed on the base (310), the limiting part (332) is embedded in the receiving space and pressed against the bottom of the second groove (3201).

7. The toe bone implant prosthesis according to claim 6, characterized in that: A column (312) is protruding from the bottom of the first sink (3102), and the main body (331) has a socket (3311). The main body (331) is plugged into the column (312) through the socket (3311) and can rotate around the axis of the column (312). The main body (331) can control the limiting part (332) to rotate around the axis of the main body (331) so that the limiting part (332) has an avoidance state and a locking state. When the limiting part (332) is in the avoidance state, the horizontal projection surface of the limiting part (332) coincides with the horizontal projection surface of the first sink groove (3102). When the limiting part (332) is in the locking state, the limiting part (332) can be pressed against the bottom of the second sink groove (3201).

8. The toe bone implant prosthesis according to claim 7, characterized in that: The horizontal cross-sectional shape of the limiting portion (332) is semicircular, and the cross-sectional shape of the limiting portion (332) is adapted to the cross-sectional shape of the second sink groove (3201), so that when the limiting portion (332) is in the locked state, the arc surface of the limiting portion (332) can be fitted and connected to the inner side wall of the second sink groove (3201).

9. The toe bone implant prosthesis according to any one of claims 4 to 8, characterized in that: Along the circumferential direction of the spacer (320), the phalangeal implant prosthesis (300) includes a plurality of the limiting structures (330) arranged at equal intervals.

10. The toe bone implant prosthesis according to claim 1, characterized in that: A threaded connection portion (311) is convexly provided on the end surface of the base (310) away from the pad (320), and the threaded connection portion (311) is threadedly connected to the metatarsal bone (100).

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