阅读说明：本技术 一种组合式骨整合系统 (Combined osseointegration system ) 是由 陈山林 刘畅 李岩 李海元 罗爱民 黄馨 李东贤 秦保祯 于 2021-03-30 设计创作，主要内容包括：本申请涉及一种组合式骨整合系统,包括种植体、连接体和义指,种植体的一端为安装端,连接体包括连接子件和连接母件,连接子件固定安装在种植体的安装端处,连接母件固定安装在义指上,连接子件和连接母件可拆卸的固定连接在一起。本申请具有使埋设在人体内的种植体固定牢固,并且改进义指与人体的相连方式,利于义指的佩戴和拆卸,提高义指的佩戴依从性,延长义指的使用寿命。(The application relates to a combined osseointegration system, which comprises an implant, a connector and a prosthetic finger, wherein one end of the implant is an installation end, the connector comprises a connecting sub-piece and a connecting mother piece, the connecting sub-piece is fixedly installed at the installation end of the implant, the connecting mother piece is fixedly installed on the prosthetic finger, and the connecting sub-piece and the connecting mother piece are detachably and fixedly connected together. The artificial finger fixing device has the advantages that the implant embedded in a human body is firmly fixed, the connection mode of the artificial finger and the human body is improved, wearing and detaching of the artificial finger are facilitated, wearing compliance of the artificial finger is improved, and the service life of the artificial finger is prolonged.)

1. A modular osseointegration system comprising: including planting body (1), connector (2) and meaning indicate (3), the one end of planting body (1) is installation end (14), and connector (2) are including connecting son spare (21) and connecting mother spare (22), connect son spare (21) fixed mounting in the installation end (14) department of planting body (1), connect mother spare (22) fixed mounting on meaning indicate (3), connect son spare (21) and connect mother spare (22) detachable fixed connection together.

2. The modular osseointegration system of claim 1, wherein: the outer side surface of the implant (1) is provided with an implant thread, the diameter of the implant (1) far away from the installation end (14) is not larger than the diameter of the implant near the installation end (14), a gap is arranged between the implant thread and the installation end (14), and the surface of the implant (1) at the gap is of a smooth structure.

3. The modular osseointegration system of claim 1, wherein: a guide groove (15) is formed in the end face of the mounting end (14), a positioning groove (16) is formed in the bottom surface of the guide groove (15), a threaded hole (17) is formed in the bottom surface of the positioning groove (16), and the diameter of one end, far away from the positioning groove (16), of the guide groove (15) is not smaller than that of the other end of the guide groove (15); connecting sub-spare (21) including connecting portion (211) and fixed location portion (213) of setting on connecting portion (211), location portion (213) can inlay and establish in constant head tank (16), and make connecting sub-spare (21) can not rotate along self axis, set up counter bore (214) of running through connecting sub-spare (21) on connecting portion (211) keep away from the terminal surface of location portion (213), wear to be equipped with countersunk screw (215) in counter bore (214), and countersunk screw (215) install in screw hole (17).

4. A modular osseointegration system according to claim 3, characterized in that: one end of the connecting sub-piece (21) far away from the implant (1) is provided with a sub-connecting mechanism, and the connecting mother piece (22) is provided with a mother connecting mechanism which is matched with the sub-connecting mechanism and fixes the connecting mother piece (22).

5. The modular osseointegration system of claim 4, wherein: the sub-connecting mechanism is a sub-connecting thread arranged on the inner side wall of the counter sink (214), the sub-connecting thread is arranged at one end of the counter sink (214) far away from the mounting end (14), the female connecting mechanism is a female connecting column (221) fixedly arranged on the connecting female piece (22), and the female connecting column (221) is arranged in the counter sink (214) and is matched with the sub-connecting thread.

6. The modular osseointegration system of claim 5, wherein: connect fixed being provided with connecting block (223) on female (22), set up on the artificial finger (3) terminal surface and hold connecting groove (31) of connecting block (223), be provided with positioning mechanism on connecting female (22) and artificial finger (3), when positioning mechanism makes connecting block (223) inlay to establish in connecting groove (31), connecting block (223) keeps fixed relative connecting groove (31).

7. The modular osseointegration system of claim 6, wherein: positioning mechanism is including seting up regulation through groove (32) on spread groove (31) lateral wall, adjusts one side that leads to groove (32) and the terminal surface coincidence that the meaning indicates (3), and two sides adjacent with this side are the regulation limit, fixedly on the lateral surface that the meaning indicates (3) be provided with along adjusting the regulating plate (33) that the limit set up, and two regulating plates (33) are worn to establish by same locking screw (34).

8. The modular osseointegration system of claim 6, wherein: connecting block (223) inlay and can not rotate along self axis when establishing in spread groove (31), have seted up jackscrew hole (45) on inlaying the lateral wall of establishing the groove, wear to be equipped with in jackscrew hole (45) with connecting block (223) butt and make connecting block (223) can not follow fixed jackscrew (46) of roll-off in spread groove (31).

9. The modular osseointegration system of claim 5, wherein: the protective handle (222) is fixedly arranged on the connecting female piece (22), one end of the protective handle (222) is connected with the connecting female piece (22), the connecting block (223) is fixedly arranged at the other end of the protective handle (222), and the end, connected with the connecting block (223), of the protective handle (222) is arranged to be a folding part.

10. The modular osseointegration system of claim 4, wherein: the auxiliary connecting mechanism is a sub-meshing tooth (5) arranged at the end face of the connecting auxiliary member (21), a main meshing tooth (51) matched with the sub-meshing tooth (5) is arranged on the end face, close to the auxiliary connecting mechanism, of the artificial finger (3), a main connecting through groove (52) is formed in the end face of the connecting main member (22), the cross section of the main connecting through groove (52) is long-strip-shaped, one end of the long-strip-shaped is overlapped with the side face of the connecting main member (22), two parallel limiting convex strips (53) are fixedly arranged on the inner side wall of the main connecting through groove (52), the limiting convex strips (53) are not parallel to the axis of the connecting through groove, and limiting grooves (54) are formed in the auxiliary connecting mechanism and the artificial finger (3); the sub-connecting mechanism and the prosthetic finger (3) are meshed and embedded in the female connecting through groove (52), and limiting convex strips (53) are embedded in the two limiting grooves (54).

Technical Field

The present application relates to the field of medical prosthetic devices, and more particularly, to a modular osseointegration system.

Background

Implantable osseointegrated prostheses, also known as bone implant prosthesis deployment technology, are the technology by which an amputee is provided with a prosthetic implant that integrates with the patient's bone, i.e., an implant that has direct contact between the living bone and the bearing implant surface. The osseointegration technique can assist the implant to be more firmly combined with the bone, remarkably improve the success rate of the implant and provide better life quality for prosthesis wearers.

At present, for patients with finger deficiencies, if the subsequent treatment is carried out by adopting a finger prosthesis technology, the connection between the finger prosthesis and the human body is carried out by adopting a silica gel sleeve type mode, so that the problems of inconvenient wearing and easy adverse reactions such as skin reaction and the like at the finger stump are solved, and the sensory signals of the finger tip cannot be transmitted back through the finger prosthesis, so that the appearance of the finger prosthesis is only improved, and the functionality of a normal finger is not provided.

In view of the above-mentioned problems, the inventor believes that a completely new wearing manner of the artificial finger can be achieved by adopting the osseointegration prosthesis technology. Good bone ingrowth is achieved between the implant and the residual bone, and sufficient stability is achieved. The artificial finger is connected with the artificial finger through a connector outside the implant body, so that the artificial finger obtains partial sensory feedback through a sensory conduction path in the bone.

Disclosure of Invention

In order to improve the fixing mode of the artificial finger and improve the wearing convenience of the artificial finger, the application provides a combined osseointegration system.

The application provides a modular osseointegration system adopts following technical scheme:

the utility model provides a modular osseointegration system, indicates including planting body, connector and meaning, the one end of planting body is the installation end, and the connector is including connecting the son and connecting female, connects son fixed mounting in the installation end department of planting body, connects female fixed mounting on meaning indicates, connects son and connects female detachable fixed connection together.

By adopting the technical scheme, the implant is used for being implanted into a patient body, when the implant is just planted, the artificial finger is not installed, the human body tissues adjacent to the implant are healed, the implant is kept stable, and then the connecting sub-piece and the artificial finger provided with the connecting main piece are installed, so that the implant and the artificial finger are connected. Or the connecting sub-element is arranged on the implant in advance, and the prosthetic finger provided with the connecting main element is arranged after healing. Since the implant is embedded in the marrow cavity, a part of sensory conduction function can be obtained through the prosthetic finger, to the connector and the implant, and thus the wearing compliance of the prosthetic finger can be improved. And because the implant is buried in the human body, and the connecting sub-piece has small volume and is not easy to collide, the implant buried in the human body is not easy to have the phenomenon of position deviation, and then the human tissue near the implant is not easy to crack or even be infected, thereby being beneficial to postoperative recovery.

Optionally, an implant thread is arranged on the outer side surface of the implant, the diameter of the implant far away from the installation end is not larger than the diameter of the implant near the installation end, a gap is formed between the implant thread and the installation end, and the surface of the implant in the gap is in a smooth structure.

Through adopting above-mentioned technical scheme, the screw thread on the implant lateral surface can be convenient for implant the planting body in the human body to do benefit to the healing of peripheral tissue. The one end that the installation end was kept away from to the implant can set to the less structure of diameter, when being convenient for implant, is difficult for appearing leading to the too thin phenomenon of narrow portion cortex lycii because of the implant diameter is too big, has reduced the risk of fracture. And the part close to the mounting end is subjected to smooth treatment, so that soft tissue irritation can be reduced, and postoperative recovery is facilitated.

Optionally, a guide groove is formed in the end face of the mounting end, a positioning groove is formed in the bottom face of the guide groove, a threaded hole is formed in the bottom face of the positioning groove, and the diameter of one end, away from the positioning groove, of the guide groove is not smaller than that of the other end of the guide groove; the connecting sub-piece comprises a connecting part and a positioning part fixedly arranged on the connecting part, the positioning part can be embedded in the positioning groove, the connecting sub-piece cannot rotate along the axis of the connecting part, a countersunk hole penetrating through the connecting sub-piece is formed in the end face, far away from the positioning part, of the connecting part, a countersunk screw penetrates through the countersunk hole, and the countersunk screw is installed in the threaded hole.

Through adopting above-mentioned technical scheme, the location portion of connecting in the son inlays establishes the back in the constant head tank to make the son of connecting can not rotate along self axis, and wear to establish the countersunk screw in the countersunk hole and can restrict the son of connecting, make the son of connecting can not move along self axis, thereby fix the position of the son of connecting. The diameter of one end of the guide groove far away from the positioning groove is larger, so that the guide groove can guide, and the positioning part is more easily embedded in the positioning groove.

Optionally, one end of the connecting sub-piece, which is far away from the implant, is provided with a sub-connecting mechanism, and the connecting mother piece is provided with a mother connecting mechanism which is matched with the sub-connecting mechanism and fixes the connecting mother piece.

Through adopting above-mentioned technical scheme, connect through son coupling mechanism and female coupling mechanism together between son and the connection mother.

Optionally, the sub-connecting mechanism is a sub-connecting thread arranged on the inner side wall of the counter sink, the sub-connecting thread is arranged at one end of the counter sink far away from the mounting end, the female connecting mechanism is a female connecting post fixedly arranged on the female connecting member, and the female connecting post is mounted in the counter sink and matched with the sub-connecting thread.

Through adopting above-mentioned technical scheme, son coupling mechanism is the screw thread, female coupling mechanism be with screw-thread fit's screw thread post, can be in the same place through simple installing connecting son and connecting mother of screw thread.

Optionally, the connecting female member is fixedly provided with a connecting block, the end face of the artificial finger is provided with a connecting groove for accommodating the connecting block, the connecting female member and the artificial finger are provided with positioning mechanisms, and when the positioning mechanisms enable the connecting block to be embedded in the connecting groove, the connecting block is fixed relative to the connecting groove.

Through adopting above-mentioned technical scheme, the connecting block of fixed setting on the connection mother can inlay in establishing the spread groove on meaning indicates, later through positioning mechanism, makes the relative spread groove of connecting block keep fixed to make meaning indicate to connect mother and keep fixed relatively, can indicate fixed mounting to indicate on the connector with meaning.

Optionally, the positioning mechanism includes an adjusting through groove formed in the side wall of the connecting groove, one side of the adjusting through groove coincides with the end face of the artificial finger, two side edges adjacent to the side edge are adjusting edges, an adjusting plate arranged along the adjusting edge is fixedly arranged on the outer side face of the artificial finger, and the two adjusting plates are penetrated through by the same locking screw.

Through adopting above-mentioned technical scheme, wear to establish two regulating plates simultaneously through the locking screw, later install the nut, can extrude two regulating plates. When the adjusting plates are close to each other, the two adjusting edges of the adjusting through groove are driven to close to each other, so that the connecting groove clamps the connecting block, the position of the artificial finger is fixed, and the artificial finger is fixedly arranged on the connecting body.

Optionally, the connecting block can not rotate along self axis when inlaying in the spread groove, has seted up the jackscrew hole on inlaying the lateral wall of establishing the groove, and the jackscrew is downthehole wear to be equipped with the connecting block butt and make the fixed jackscrew of connecting block can not follow the interior roll-off of spread groove.

Through adopting above-mentioned technical scheme, the connecting block inlays unable rotation when establishing in the spread groove, and fixed jackscrew limits the connecting block, makes the connecting block can not the roll-off spread groove to can fix the position that the meaning indicates, make the meaning indicate fixed mounting on the connector.

Optionally, a protection handle is fixedly arranged on the connection female part, one end of the protection handle is connected with the connection female part, the connection block is fixedly arranged at the other end of the protection handle, and the end, connected with the connection block, of the protection handle is arranged to be an easy-to-fold portion.

By adopting the technical scheme, the protection handle can be set into a structure that the diameter of one end close to the connecting block is smaller than that of the other end, so that the easy-to-break part is easier to break when the artificial limb is subjected to larger external force. The artificial finger can not easily drive the implant to move, thereby reducing the probability of the phenomena of implant damage and fracture.

Optionally, the secondary connecting mechanism is a secondary engaging tooth arranged at the end face of the secondary connecting member, the end face of the artificial finger close to the secondary connecting mechanism is provided with a secondary engaging tooth matched with the secondary engaging tooth, the end face of the primary connecting member is provided with a secondary connecting through groove, the cross section of the secondary connecting through groove is long, one end of the long strip is superposed with the side face of the primary connecting member, two mutually parallel limiting convex strips are fixedly arranged on the inner side wall of the secondary connecting through groove, the limiting convex strips are not parallel to the axis of the connecting through groove, and the secondary connecting mechanism and the artificial finger are both provided with limiting grooves; the secondary connecting mechanism and the artificial finger are meshed and embedded in the primary connecting through groove, and limiting convex strips are embedded in the two limiting grooves.

By adopting the technical scheme, the artificial finger arranged on the connecting sub-piece cannot rotate after the sub-meshing teeth and the female meshing teeth are meshed with each other. After the connecting female element is arranged on the connecting male element and the artificial finger, the male occlusion teeth on the connecting male element and the female occlusion teeth on the artificial finger cannot be separated from each other under the clamping of the limiting convex strips, so that the artificial finger is fixedly arranged on the connecting body.

In summary, the present application includes at least one of the following beneficial technical effects:

1. improve the wearing mode of artificial finger, wear by the silica gel cover is external to be changed into the endosseum implant formula and wear, wear more comfortable, and have partial sensation conduction function.

2. The implant embedded in the human body is not easy to have the phenomenon of position deviation, so that the human tissue near the implant is not easy to crack or even infect, and the postoperative recovery is facilitated;

3. the probability of implant damage and fracture phenomena is reduced.

Drawings

Fig. 1 is an installation diagram of the first embodiment.

Fig. 2 is a schematic structural diagram of the first embodiment.

Fig. 3 is a schematic view of the installation of the implant and the connecting body according to the first embodiment.

FIG. 4 is a schematic view of the connection body and the artificial finger according to the first embodiment.

Fig. 5 is a schematic structural diagram of the second embodiment.

FIG. 6 is a schematic view showing the installation of the connecting body and the artificial finger according to the second embodiment.

FIG. 7 is a schematic structural diagram of the third embodiment.

FIG. 8 is a schematic view showing the installation of the connecting body and the artificial finger in the third embodiment.

FIG. 9 is a schematic structural view of the fourth embodiment.

FIG. 10 is a schematic view showing the installation of the connecting body and the artificial finger according to the fourth embodiment.

Description of reference numerals: 1. an implant; 11. a tail section; 12. a middle section; 13. a head section; 14. an installation end; 15. a guide groove; 16. positioning a groove; 17. a threaded hole; 18. cutting edges; 2. a linker; 21. a connecting sub-member; 211. a connecting portion; 212. a guide portion; 213. a positioning part; 214. a countersunk hole; 215. countersunk head screws; 22. connecting the female member; 221. a female connecting column; 222. a protection handle; 223. connecting blocks; 3. finger pointing; 31. connecting grooves; 32. adjusting the through groove; 33. an adjusting plate; 34. a locking screw; 4. a first block; 41. a second block; 42. locking the clamping groove; 43. a first groove; 44. a second groove; 45. a jackscrew hole; 46. fixing the jackscrew; 5. a secondary occlusion tooth; 51. a female engaging tooth; 52. a female connecting through groove; 53. limiting convex strips; 54. a limiting groove; 55. a limiting convex edge; 56. a smooth section; 6. a head bolt.

Detailed Description

The present application is described in further detail below with reference to figures 1-10.

The embodiment of the application discloses a combined osseointegration system.

Example one

Referring to fig. 1 and 2, the combined osseointegration system comprises an implant 1, a connecting body 2 and a prosthetic finger 3; an implant 1 is buried in a human body, a connector 2 is mounted on the implant 1, and an artificial finger 3 is mounted on the implant 1. The connecting body 2 comprises a connecting sub-piece 21 and a connecting mother piece 22, the connecting sub-piece 21 is connected with the implant 1, and the connecting mother piece 22 is connected with the prosthetic finger 3.

Referring to fig. 2 and 3, the implant 1 has a cylindrical shape, and one end of the implant 1 is a mounting end 14. The implant 1 is divided into three sections in sequence, the tail section 11 is sequentially arranged from the mounting end 14 to the other end, the middle section 12 and the head section 13 are sequentially arranged, the tail section 11 and the head section 13 are both in a circular truncated cone shape, the middle section 12 is cylindrical, one end, far away from the middle section 12, of the tail section 11 is one end, large in circular truncated cone shape, of one end, adjacent to the middle section 12, of the tail section 11 and the middle section 12, the diameter of one end, adjacent to the head section 13, of the middle section 12 is equal to the diameter of one end, far away from the middle section 12, of the head section 13 is one end, small in circular truncated cone shape, three cutting edges 18 are circumferentially arranged on the outer side face of the head section 13 at equal intervals, and the cutting edges 18 can reduce resistance when the implant 1 is implanted. An implant thread is also arranged on the outer side surface of the implant 1. The head section 13 is arranged in a round table shape, so that the phenomenon that the cortex of a narrow part is too thin due to too large diameter of the implant 1 is not easy to occur while the implant is convenient to implant, and the risk of fracture is reduced. The tail section 11 is arranged in a round table shape, so that the strength of the implant 1 is increased, and the locking force of the implant 1 is increased. And the implant thread arranged on the outer side surface of the implant 1 can facilitate the implantation of the implant 1 into the human body, which is beneficial to the healing of peripheral tissues.

Referring to fig. 2 and 3, a guide groove 15 is formed on an end surface of the mounting end 14 of the implant 1, and a diameter of the guide groove 15 near the mounting end 14 is larger than a diameter of the guide groove 15 far from the mounting end 14. The bottom surface of the guide groove 15 is provided with a positioning groove 16, the positioning groove 16 is hexagonal, and the center of the bottom surface of the positioning groove 16 is provided with a threaded hole 17. The positioning groove 16 having a hexagonal shape can facilitate a doctor to implant the implant 1 using an attachment screwdriver. The connection sub 21 includes a connection portion 211, a guide portion 212, and a positioning portion 213 connected in this order. The positioning portion 213 has the same shape as the positioning groove 16, so that the positioning portion 213 cannot rotate when being embedded in the positioning groove 16. The shape of the guide part 212 is the same as that of the guide groove 15, so that when the guide part 212 is embedded in the guide groove 15, the connecting sub-member 21 and the implant 1 are stably connected, and the phenomenon of looseness is not easy to occur. The connection portion 211 is located outside the guide groove 15 for connection with the connection female member 22. The connecting portion 211 is provided with a counter bore 214 on an end surface thereof away from the positioning portion 213, and the counter bore 214 is located at the center of the end surface and penetrates through the connecting sub-member 21. A countersunk screw 215 is inserted into the countersunk hole 214, and the countersunk screw 215 is simultaneously screwed into the screw hole 17, thereby fixing the connector piece 21 to the implant 1.

Referring to fig. 3 and 4, the depth of the head of the countersunk hole 214 is greater than the thickness of the head of the countersunk screw 215, so that after the countersunk screw 215 is installed in the countersunk hole 214, a gap is formed between the countersunk screw 215 and the opening of the countersunk hole 214. Sub-connection threads as a sub-connection mechanism are provided on the inner side wall of the counterbore 214. A female connecting post 221 as a female connecting mechanism is integrally formed on the female connecting element 22, and the female connecting post 221 is installed in the counter bored hole 214 and is in threaded fit with the male connecting element, so that the female connecting element 22 and the male connecting element 21 are fixedly connected together. The hexagonal structures are cut on the side surfaces of the female connecting element 22 and the male connecting element 21, so that the female connecting element and the male connecting element are convenient for a doctor to tighten by using a tool.

Referring to fig. 3 and 4, a protection handle 222 is integrally formed on the female connection element 22, the protection handle 222 is in the shape of a circular truncated cone, one end of the protection handle 222 close to the male connection element 21 is a large-diameter end, a spherical connection block 223 is integrally formed on the small-diameter end of the protection handle 222, the diameter of the connection block 223 is larger than that of the smallest end of the protection handle 222, and the connection part between the protection handle and the connection block 223 is an easy-to-fold part. The end surface of the artificial finger 3 is provided with a connecting groove 31, and the connecting block 223 is embedded in the connecting groove 31, so that the direction of the artificial finger 3 can be adjusted freely. A strip-shaped adjusting through groove 32 is formed in the side wall of the connecting groove 31, one end of the adjusting through groove 32 is overlapped with the end face of the artificial finger 3, and two adjacent side edges of the end are called adjusting edges. Two adjusting plates 33 are integrally formed on the outer side surface of the artificial finger 3, the adjusting plates 33 correspond to the adjusting edges one to one, and the adjusting plates 33 are arranged along the corresponding adjusting edges. Both adjusting plates 33 are penetrated by the same locking screw 34, and a nut may be mounted on the locking screw 34. After people adjust the artificial finger 3, the locking screw 34 is rotated to drive the adjusting plate 33 to approach each other, so that the connecting groove 31 clamps the connecting block 223, and the artificial finger 3 is kept fixed relative to the connecting female member 22, and the artificial finger 3 can be fixedly installed on the connecting body 2. When the artificial limb is subjected to a larger external force, the easy-to-break part is easier to break. The prosthetic finger 3 can not easily drive the implant 1 to move, and the probability of damage and fracture of the implant 1 is reduced.

The implementation principle of the first embodiment is as follows: when the implant is just planted, the implant 1 is firstly used for being implanted into the body of a patient, then a sealing cap is arranged to enable the peripheral human tissue of the implant 1 to heal, and the sealing cap is taken down until the implant 1 is kept stable. The coupling sub-member 21 may then be mounted on the implant 1 and the prosthetic finger 3 with the coupling female member 22 mounted thereon may be mounted on the implant 1.

Since the implant 1 is embedded in the bone marrow cavity, the prosthetic finger 3 can obtain a partial sensory conduction function through the connecting body 2 and the implant 1, and thus the wearing compliance of the prosthetic finger 3 can be improved. Because the implant 1 is buried in the human body and the connecting sub-piece 21 has a small volume and is not easy to collide, the implant 1 buried in the human body is not easy to have the phenomenon of position deviation, and then the human tissue near the implant 1 is not easy to crack or even have the phenomenon of infection, thereby being beneficial to postoperative recovery.

Example two

Referring to fig. 5 and 6, the present embodiment is different from the first embodiment in that the connecting block 223 is divided into the first block 4 and the second block 41, and the first block 4 is integrally formed on the connecting female member 22. The first block 4 is cylindrical in shape, and meshing teeth are provided on the outer side surface of the first block 4. The second block 41 is integrally formed at one end of the first block 4 away from the connecting sub-member 21, a locking slot 42 is formed in the outer side surface of the second block 41, and the locking slot 42 is annular and is circumferentially arranged along the outer side surface of the second block 41. The connecting groove 31 is also divided into a first groove 43 and a second groove 44, the first groove 43 is opened on the end face of the artificial finger 3, the second groove 44 is opened on the bottom face of the first groove 43, the cross-sectional shape of the first groove 43 is the same as the cross-sectional shape of the first block 4, and the cross-sectional shape of the second groove 44 is the same as the cross-sectional shape of the second block 41. A jackscrew hole 45 is formed in the side wall of the second groove 44, a fixed jackscrew 46 is embedded in the jackscrew hole 45, and one end of the fixed jackscrew 46 is embedded in the locking slot.

The implementation principle of the second embodiment is as follows: the first block 4 is limited by the first groove 43, so that the connecting block 223 can not rotate in the connecting groove 31, and the second block 41 is limited by the fixing jackscrew 46, so that the connecting block 223 can not be taken out from the connecting groove 31, thereby fixing the position of the artificial finger 3 and fixedly installing the artificial finger 3 on the connecting body 2.

EXAMPLE III

Referring to fig. 7 and 8, the present embodiment is different from the first embodiment in that the depth of the head of the countersunk hole 214 is equal to the thickness of the head of the countersunk screw 215, a sub-engaging tooth 5 serving as a sub-coupling mechanism is provided on the end surface of the coupling sub-member 21 away from the implant 1, and a female engaging tooth 51 engaged with the sub-engaging tooth 5 is provided on the end surface of the artificial finger 3 close to the sub-coupling mechanism. The female connecting member 22 is shaped like a circular cake, and a female connecting through groove 52 is formed in an end surface of the female connecting member 22. The cross section of the female connecting through groove 52 is elongated, and one end of the female connecting through groove 52 coincides with the side surface of the connecting female member 22. The female connection through groove 52 is integrally formed with a limit convex strip 53, the limit convex strip 53 is respectively provided with a group at two ends of the connection through groove, and the limit convex strip 53 is arranged along the opening edge of the connection through groove. An annular limiting groove 54 is cut both on the outer side of the connecting part 21 and on the outer side of the prosthetic finger 3. The bottom surface of the limiting groove 54 on the connecting sub-member 21 is configured to be an external hexagonal structure, and when the limiting convex strip 53 is embedded in the limiting groove 54, the limiting convex strip 53 is tightly attached to two opposite side edges of the bottom surface of the limiting groove 54. The cross-section of the limiting groove 54 on the artificial finger 3 is circular, when the limiting convex strip 53 is embedded in the limiting groove 54, the limiting convex strip 53 is attached to the bottom surface of the limiting groove 54, the limiting convex strip 53 is integrally formed with a limiting convex edge 55, the limiting convex edge 55 is arranged at one end of the female connecting through groove 52 coinciding with the side surface of the female connecting part 22, and the distance between the two limiting convex edges 55 is smaller than the diameter of the bottom surface of the limiting groove 54 on the artificial finger 3.

Referring to fig. 7 and 8, the implant 1 is sequentially divided into four sections, namely, a smooth section 56, a tail section 11, a middle section 12 and a head section 13 from the mounting end 14 to the other end. The implant threads on the outer side of the implant 1 are only provided on the tail section 11, the middle section 12 and the head section 13. The surface of the implant 1 at the smooth section 56 is configured to be rounded. By rounding the smooth section 56 near the mounting end 14, soft tissue irritation can be reduced, facilitating post-operative recovery.

The implementation principle of the third embodiment is as follows: when the artificial finger 3 is attached to the sub-connecting mechanism, the artificial finger 3 attached to the connecting sub-member 21 cannot rotate after the sub-engaging teeth 5 and the female engaging teeth 51 are engaged with each other. After the female coupling member 22 is mounted on the male coupling member 21 and the artificial finger 3, the artificial finger 3 is fixedly mounted on the coupling body 2 by holding the male engaging teeth 5 of the male coupling member 21 and the female engaging teeth 51 of the artificial finger 3 by the holding protrusion 53. When the structure is disassembled and assembled, the female connecting piece 22 can be fixed on the male connecting piece 21 and the artificial finger 3 under the clamping of the limiting convex edge 55, and the female connecting piece is not easy to fall off.

Example four

Referring to fig. 9 and 10, the present embodiment is different from the second embodiment in that the connecting sub-member 21 further includes a head bolt 6, the head bolt 6 is in threaded engagement with the sub-connecting thread on the inner side wall of the counter bore 214, the head of the head bolt 6 is located outside the counter bore 214, and the diameter of the head bolt 6 is the same as the diameter of the end surface of the artificial finger 3 near the implant 1. The sub engagement teeth 5 are provided at the end face of the head bolt 6.

The implementation principle of the fourth embodiment is as follows: the sub engagement teeth 5 are provided on the head bolt 6 so that the sub engagement teeth 5 can be replaced after wear without removing the connecting sub 21.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.