CN113974926B

CN113974926B - Prosthesis assembly

Info

Publication number: CN113974926B
Application number: CN202111594128.1A
Authority: CN
Inventors: 王彩梅
Original assignee: Beijing AK Medical Co Ltd
Current assignee: Beijing AK Medical Co Ltd
Priority date: 2021-12-24
Filing date: 2021-12-24
Publication date: 2022-05-03
Anticipated expiration: 2041-12-24
Also published as: CN113974926A

Abstract

The present invention provides a prosthesis assembly comprising: the implantation barrel is provided with a first barrel section, a first external thread is arranged on the outer wall of the first barrel section, an axial notch is arranged on the first barrel section, and the axial notch penetrates through the inner surface and the outer surface of the first barrel section; first vaulting pole and second vaulting pole, first vaulting pole and second vaulting pole alternative and detachably connect in implanting a section of thick bamboo, first vaulting pole end position has the default distance in implanting a section of thick bamboo and with the terminal surface of first section of thick bamboo section, and the terminal surface of implanting a section of thick bamboo is worn out to the second vaulting pole, and wherein, first vaulting pole or second vaulting pole and the cooperation of first section of thick bamboo butt so that first section of thick bamboo expands outward. The technical scheme of the application effectively solves the problem that the fixing difficulty of the endoprosthesis and the residual limb in the related technology is large.

Description

Prosthesis assembly

Technical Field

The invention relates to the field of medical instruments, in particular to a prosthesis component.

Background

In order to restore the normal life of amputees, artificial limbs play an important role. Prostheses in current clinical applications include both captive prostheses and implanted prostheses. The accommodating artificial limb is connected with the stump of a patient through the receiving cavity, however, the receiving cavity is unqualified, the stump is easy to deform, and meanwhile, long-term compression can also cause sarcoma and pain in severe cases. Moreover, the bad air permeability between the contact surface of the accommodating type artificial limb and the stump can generate peculiar smell, and the friction between the artificial limb and the stump can also cause the stump to be easy to infect. The socket of a receiving prosthesis also limits the range of motion of the limb. The implanted artificial limb cancels the receiving cavity, so that the soft tissue of the stump does not bear force, the stress state is more reasonable, and the motion range is enlarged.

In the related art, the implantable prosthesis mainly includes an implantable prosthesis and an external prosthesis, and both ends of the implantable prosthesis are connected to the residual limb and the external prosthesis, respectively. The endoprosthesis is made of a biocompatible material and is osseointegrated with the bone of the stump. However, the implantable prosthesis in the related art has a problem that the fixing of the implantable prosthesis to the residual limb is difficult.

Disclosure of Invention

The main objective of the present invention is to provide a prosthesis assembly to solve the problem of difficult fixation between the endoprosthesis and the stump in the related art.

In order to achieve the above object, the present invention provides a prosthesis assembly comprising: the implantation barrel is provided with a first barrel section, a first external thread is arranged on the outer wall of the first barrel section, an axial notch is arranged on the first barrel section, and the axial notch penetrates through the inner surface and the outer surface of the first barrel section; first vaulting pole and second vaulting pole, first vaulting pole and second vaulting pole alternative and detachably connect in implanting a section of thick bamboo, first vaulting pole end position has the default distance in implanting a section of thick bamboo and with the terminal surface of first section of thick bamboo section, and the terminal surface of implanting a section of thick bamboo is worn out to the second vaulting pole, and wherein, first vaulting pole or second vaulting pole and the cooperation of first section of thick bamboo butt so that first section of thick bamboo expands outward.

Further, the implantation tube further comprises a second tube section connected with the first tube section, the first tube section is provided with a first end far away from the second tube section and a second end close to the second tube section, and the axial incision extends from the first end of the first tube section to the second end of the first tube section, wherein when the first support rod is connected in the implantation tube, a part of the first support rod is positioned in the second tube section and connected with the second tube section, and when the second support rod is connected in the implantation tube, a part of the second support rod is positioned in the second tube section and connected with the second tube section.

Further, the hole of first section of thick bamboo section is the bell mouth, and the diameter of the hole of first section of thick bamboo section is crescent in the direction of first end to second end by first section of thick bamboo section, and first vaulting pole includes the first taper pole section with first section of thick bamboo section complex, and the second vaulting pole includes the second taper pole section with first section of thick bamboo section complex, and the tapering of first taper pole section and the tapering of second taper pole section all are less than or equal to the tapering of the hole of first section of thick bamboo section.

Further, the prosthesis assembly further comprises a third support rod, the first support rod, the second support rod and the third support rod are alternatively and detachably connected into the implantation barrel, the third support rod penetrates out of the end face of the implantation barrel, the third support rod is in butt fit with the first barrel section to enable the first barrel section to expand outwards, and a stopping structure is arranged between the third support rod and the first barrel section.

Further, the diameter of the hole of first section of thick bamboo section is less than the diameter of the hole of second section of thick bamboo section, and the hole of second section of thick bamboo section is the screw hole, and wherein, when first vaulting pole is connected in implanting a section of thick bamboo, first vaulting pole still includes the first screw rod section with screw hole complex, when the second vaulting pole is connected in implanting a section of thick bamboo, the second vaulting pole still includes the second screw rod section with screw hole complex, when the third vaulting pole is connected in implanting a section of thick bamboo, the third vaulting pole includes the third screw rod section with screw hole complex.

Furthermore, the stopping structure comprises a stopping ring groove and a stopping protrusion extending into the stopping ring groove, the stopping ring groove is arranged on the outer wall of the third supporting rod, and the stopping protrusion is arranged on the hole wall of the first end of the first barrel section.

Furthermore, the inner hole of the first cylinder section is a taper hole, the diameter of the inner hole of the first cylinder section is gradually increased from the first end to the second end of the first cylinder section, the third support rod further comprises a pole section matched with the inner hole of the first cylinder section, and the diameter of the pole section is larger than or equal to the minimum value of the diameter of the inner hole of the first cylinder section.

Further, the axial incision is a plurality of, and a plurality of axial incisions separate into a plurality of lamella bodies with first section of thick bamboo, and wherein at least one lamella body includes a plurality of lamella body units that set up in the direction of first end to the second end along first section of thick bamboo, and the width of two adjacent lamella body units is inequality.

Further, the axial cuts comprise a first axial cut and a plurality of second axial cuts, the first axial cut is arranged between two adjacent second axial cuts, the second axial cuts are linear, and the first axial cuts comprise curved sections.

Further, the curve section is a plurality of, and the protruding direction of two adjacent curve sections is opposite.

Further, the first axial cut also includes a plurality of straight line segments, each curved line segment being disposed between two adjacent straight line segments.

Further, the prosthesis component further comprises a first sensor arranged on the side wall of the first support rod, a second sensor arranged on the side wall of the second support rod and a third sensor arranged on the side wall of the third support rod, wherein the first sensor, the second sensor and the third sensor are alternatively connected with a controller outside the prosthesis component.

Furthermore, the implantation cylinder also comprises a third cylinder section connected with the second cylinder section, the diameter of the inner hole of the third cylinder section is larger than that of the inner hole of the second cylinder section, and the prosthesis component also comprises a plugging piece arranged in the inner hole of the third cylinder section.

Further, the hole of third section of thick bamboo section includes and is provided with the internal thread on the pore wall with the hole of second section of thick bamboo section, and the shutoff piece includes first sealing member, be provided with on the first sealing member with internal thread complex second external screw thread, wherein, internal thread's pitch equals the pitch of second external screw thread, and internal thread material is metal, and the material of second external screw thread is plastics.

Further, the plugging piece further comprises a plugging plug arranged in the inner hole of the third cylinder section, the plugging plug is located at one end, far away from the second cylinder section, of the first sealing piece, a third external thread matched with the internal thread is arranged on the plugging plug, and the thread pitch of the third external thread is equal to that of the internal thread.

Further, a step surface is arranged between the inner hole of the third cylinder section and the inner hole of the second cylinder section, and the prosthesis assembly further comprises a second sealing element arranged at the step surface; the implant cartridge further includes a fourth cartridge section connected between the second cartridge section and the third cartridge section, the fourth cartridge section having an outer diameter less than the outer diameter of the second cartridge section.

With the technical solution of the present invention applied, the prosthesis assembly comprises: an implant cylinder, a first support rod and a second support rod. The implant cartridge has a first cartridge section. Be provided with first external screw thread on the outer wall of first section of thick bamboo, be provided with axial incision on the first section of thick bamboo. The axial cuts extend through the inner and outer surfaces of the first barrel section. The provision of the axial slit enables radial deformation of the implant cartridge. The first support rod and the second support rod are alternatively and detachably connected in the implantation cylinder. The end part of the first support rod is positioned in the implantation cylinder and has a preset distance with the end surface of the first cylinder section, and the second support rod penetrates out of the end surface of the implantation cylinder. Wherein, under the condition that the first section of thick bamboo of implanting a section of thick bamboo inserts the class normal conical bone intracavity of stump, first external screw thread screw in to stump bone intracavity wall on the first section of thick bamboo, insert first vaulting pole again in the first section of thick bamboo, first vaulting pole and the cooperation of first section of thick bamboo butt are so that first section of thick bamboo expands outward, because the size of class normal conical bone chamber diminishes gradually by its oral area to inside direction, screw in receives backward extrusion to the first external screw thread in the stump bone intracavity wall, because first vaulting pole tip position has the distance of predetermineeing in implanting a section of thick bamboo and with the terminal surface of first section of thick bamboo, make and implant a section of thick bamboo and have the deformation space, so that the shape that expands outward of first section of thick bamboo keeps unchangeable or first section of thick bamboo retraction, so that first external screw thread on the first section of thick bamboo combines closely with the stump bone chamber, fix the fixed effect that can guarantee the false body subassembly easily. Under the condition that the first section of thick bamboo of implanting a section of thick bamboo inserts the quasi-cylindrical bone intracavity of stump, first external screw thread screw in on the first section of thick bamboo to incomplete limb bone intracavity wall, insert to the second vaulting pole again in the first section of thick bamboo, the cooperation of second vaulting pole and first section of thick bamboo butt is so that first section of thick bamboo expands outward, because the bone chamber size of quasi-cylindrical is roughly equal by its oral area to inside direction, first external screw thread continues to extrude in the incomplete limb bone intracavity wall, so that first external screw thread on the first section of thick bamboo combines closely with incomplete limb bone chamber, fix easily and can guarantee the fixed effect of false body subassembly. Therefore, the technical scheme of the application can solve the problem that the fixing difficulty of the endoprosthesis body and the residual limb in the related technology is high. And the part of the implantation tube exposed out of the residual limb is connected with the external artificial limb.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 shows a schematic front view of an implant cartridge of an embodiment of a prosthetic assembly according to the present invention;

FIG. 2 shows a schematic cross-sectional view of an implant cartridge of the prosthesis assembly of FIG. 1;

FIG. 3 shows a schematic top view of an implant cartridge of the prosthesis assembly of FIG. 1;

FIG. 4 shows a schematic view of the prosthesis assembly of FIG. 1 fitted within a bone cavity of a right-taper-like shape;

FIG. 5 shows a schematic view of the prosthesis assembly of FIG. 1 fitted within a quasi-cylindrical bone cavity;

FIG. 6 shows a schematic view of the prosthesis assembly of FIG. 1 fitted within a bone cavity resembling an inverted cone;

FIG. 7 shows a schematic front view of a first strut of the prosthesis assembly of FIG. 1;

FIG. 8 shows a schematic front view of a second strut of the prosthesis assembly of FIG. 1;

FIG. 9 shows a schematic front view of a third strut of the prosthesis assembly of FIG. 1;

FIG. 10 shows a schematic front view of the first strut of the prosthesis assembly of FIG. 1 in the implant cartridge;

FIG. 11 shows a schematic cross-sectional view of the first strut of the prosthesis assembly of FIG. 10 positioned within the implant cartridge;

FIG. 12 shows a schematic front view of the second strut of the prosthesis assembly of FIG. 1 in the implant cartridge;

FIG. 13 shows a schematic cross-sectional view of the prosthesis assembly of FIG. 12 with the second strut positioned within the implant cartridge;

FIG. 14 shows a schematic front view of the third strut of the prosthesis assembly of FIG. 1 in the implant cartridge;

FIG. 15 shows a schematic cross-sectional view of the third strut of the prosthesis assembly of FIG. 14 positioned within the implant cartridge;

FIG. 16 shows an enlarged schematic view at A of the prosthesis assembly of FIG. 15;

FIG. 17 shows a schematic cross-sectional view of the closure member of the prosthesis assembly of FIG. 1 positioned within an implantation cartridge;

FIG. 18 illustrates a perspective view of a first seal of the prosthesis assembly of FIG. 1;

FIG. 19 shows a schematic cross-sectional view of the first seal of FIG. 18;

FIG. 20 shows a side schematic view of the first seal of FIG. 18;

FIG. 21 shows a perspective view of a plug of the prosthetic assembly of FIG. 1;

FIG. 22 shows a schematic cross-sectional view of the plug of FIG. 21;

FIG. 23 shows a side schematic view of the plug of FIG. 21;

FIG. 24 shows a partial schematic view of the first seal of FIG. 17 positioned within a third cartridge segment.

Wherein the figures include the following reference numerals:

1. a bone cavity resembling a right cone; 2. a quasi-cylindrical bone cavity; 3. a bone cavity resembling an inverted cone; 10. an implantation cartridge; 11. a first barrel section; 111. stopping the bulge; 112. a flap body; 12. a first external thread; 13. a first axial cut; 131. a curve segment; 132. a straight line segment; 14. a second barrel section; 15. a second axial cut; 16. a third barrel section; 17. a fourth barrel section; 20. a first stay bar; 21. a first taper rod section; 22. a first screw section; 30. a second stay bar; 31. a second taper section; 32. a second screw section; 40. a third stay bar; 41. a mast section; 411. a backstop ring groove; 42. a third screw section; 50. a blocking piece; 51. a first seal member; 52. blocking; 60. a second seal.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

As shown in fig. 1 to 13, the prosthesis assembly of the present embodiment includes: implant cylinder 10, first strut 20 and second strut 30. An implantation section of thick bamboo 10 has first section of thick bamboo 11, is provided with first external screw thread 12 on the outer wall of first section of thick bamboo 11, is provided with the axial incision on the first section of thick bamboo 11, and the axial incision runs through the interior external surface of first section of thick bamboo 11. The first and

second struts

20 and 30 are alternatively and detachably connected within the implant 10. The end of the first stay bar 20 is located in the implantation tube 10 and has a preset distance D with the end surface of the first tube section 11, and the second stay bar 30 penetrates out of the end surface of the implantation tube 10, wherein the first stay bar 20 or the second stay bar 30 is in butt fit with the first tube section 11 so as to expand the first tube section 11.

With the technical solution of this embodiment, the first cylinder section 11 is provided with an axial cut. The axial cuts extend through the inner and outer surfaces of the first barrel section 11. The provision of the axial cut enables radial deformation of the implant 10. The first and

second struts

20 and 30 are alternatively and detachably connected within the implant 10. The end of the first stay bar 20 is located in the implantation tube 10 and has a preset distance D with the end surface of the first tube section 11, and the second stay bar 30 penetrates out of the end surface of the implantation tube 10. Wherein, under the condition that the first cylinder section 11 of the implantation cylinder 10 is inserted into the bone cavity of the stump similar to the regular cone, the first external thread 12 on the first cylinder section 11 is screwed into the inner wall of the bone cavity of the stump and then is inserted into the first cylinder section 11 to the first support rod 20, the first support rod 20 is in butt fit with the first cylinder section 11 so as to enable the first cylinder section 11 to expand outwards, as the size of the bone cavity 1 similar to the regular cone shape is gradually reduced from the mouth part to the inner part, the first external thread 12 screwed into the inner wall of the stump bone cavity is reversely extruded, since the end of the first stay 20 is located in the implantation tube 10 and has a predetermined distance D from the end surface of the first tube section 11, there is a deformation space in the implantation tube 10, so that the outward expansion shape of the first cylinder section 11 is kept unchanged or the first cylinder section 11 is retracted, so that the first external thread 12 on the first cylinder section 11 is tightly combined with the bone cavity of the stump, the fixation is easy, and the fixation effect of the prosthesis component can be ensured. Under the condition that the first cylinder section 11 of the implantation cylinder 10 is inserted into the similar-column-shaped bone cavity 2 of the stump, the first external thread 12 on the first cylinder section 11 is screwed into the inner wall of the bone cavity of the stump, and then the first cylinder section 11 is inserted into the second support rod 30, the second support rod 30 is in butt fit with the first cylinder section 11 so that the first cylinder section 11 expands outwards, because the size of the similar-column-shaped bone cavity is approximately equal from the mouth to the inside direction, the first external thread 12 continues to be extruded into the inner wall of the bone cavity of the stump, so that the first external thread 12 on the first cylinder section 11 is tightly combined with the bone cavity of the stump, and the fixation effect of the prosthesis component is easy to fix and can be ensured. Therefore, the technical scheme of the embodiment can solve the problem that the fixing difficulty of the endoprosthesis and the residual limb in the related art is high. And the portion of the implant canister 10 exposed to the residual limb is connected to an external prosthesis. Thus, the technical scheme of the embodiment is different from the receiving cavity used for transferring motion and power of the accommodating type artificial limb in the related technology, and the force is directly transferred to the residual bone through the prosthesis component of the embodiment, so that the biomechanical law of the human body is met. Such a prosthesis assembly fundamentally solves the disadvantages of the related art, and allows the impact force not to damage the implant cylinder 10 and the residual bone, thereby protecting the implant cylinder 10 and the residual bone. The artificial limb prosthesis more accords with the biological motion rule of human limbs, so that a person implanted with the prosthesis component has the same feeling as a common person.

As shown in fig. 11, the preset distance D is in the range of 18mm to 20mm, and the preset distance D is preferably 18mm, 19mm or 20 mm.

It should be noted that, the outward expansion of the first cylindrical section 11 means that the axial incision width is increased, and the inward contraction of the first cylindrical section 11 means that the axial incision width is decreased. The stump may be a humeral stump or a femoral stump.

In this embodiment, the end of the first barrel section 11 remote from the second barrel section 14 forms a smooth transition which facilitates guiding the implant cartridge 10 into the bone cavity of the stump.

As shown in fig. 1-13, the implantation cartridge 10 further comprises a second cartridge section 14 connected to the first cartridge section 11. The first barrel section 11 has a first end distal to the second barrel section 14 and a second end proximal to the second barrel section 14. The axial cut extends from a first end of the first barrel section 11 to a second end of the first barrel section 11. In this way, the first cylindrical segment 11 is completely cut by the axial cuts, and the first cylindrical segment 11 is easily deformed radially. When the first strut 20 is connected within the implantation tube 10, a portion of the first strut 20 is located within the second tube section 14 and connected to the second tube section 14 such that a portion of the first strut 20 is secured within the second tube section 14, the outer wall of the first strut 20 abuts the inner bore of the first tube section 11, and the first strut 20 enables the first tube section 11 to expand outwardly. When the second strut 30 is connected within the implant 10, a portion of the second strut 30 is located within the second barrel section 14 and connected to the second barrel section 14. In this way, a part of the second stay 30 is fixed in the second cylinder section 14, the outer wall of the second stay 30 is attached to the inner hole of the first cylinder section 11, and the second stay 30 can expand the first cylinder section 11.

It should be noted that the first cylinder section 11 has a first end far from the second cylinder section 14 and a second end near the second cylinder section 14 in an opposite relationship, that is, the distance between the first end of the first cylinder section 11 and the second cylinder section 14 is greater than the distance between the second end of the first cylinder section 11 and the second cylinder section 14.

As shown in fig. 1 to 13, the inner hole of the first cylinder section 11 is a tapered hole, and the diameter of the inner hole of the first cylinder section 11 gradually increases from the first end to the second end of the first cylinder section 11. In order to facilitate the flaring of the first barrel section 11, the first brace 20 comprises a first taper segment 21 which is matched with the first barrel section 11, the second brace 30 comprises a second taper segment 31 which is matched with the first barrel section 11, and the taper of the first taper segment 21 and the taper of the second taper segment 31 are equal to the taper of the inner hole of the first barrel section 11.

In an embodiment not shown in the figures, the taper of the first tapered section and the taper of the second tapered section are both less than the taper of the internal bore of the first barrel section.

As shown in fig. 1-16, the prosthesis assembly further includes a third strut 40. The first brace 20, the second brace 30 and the third brace 40 are alternatively and detachably connected in the implantation tube 10, and the third brace 40 penetrates out of the end surface of the implantation tube 10. Wherein, third vaulting pole 40 and first section of thick bamboo 11 butt cooperation are so that first section of thick bamboo 11 expands outward, are provided with the stopping structure between third vaulting pole 40 and the first section of thick bamboo 11. Under the condition that the first cylinder section 11 of the implantation cylinder 10 is inserted into the inverted cone-like bone cavity 3 of the stump, the first external thread 12 on the first cylinder section 11 is screwed into the inner wall of the bone cavity of the stump, and then the third support rod 40 is inserted into the first cylinder section 11, the third support rod 40 is in butt fit with the first cylinder section 11 so as to enable the first cylinder section 11 to expand outwards, because the size of the inverted cone-like bone cavity is gradually increased from the opening part to the inner part, the first cylinder section 11 continues to expand outwards, so that the first external thread 12 is extruded into the inner wall of the bone cavity of the stump from the opening part to the inner part of the inverted cone-like bone cavity, so that the first external thread 12 on the first cylinder section 11 is tightly combined with the bone cavity of the stump, and the setting of the retaining structure prevents the third support rod 40 from retreating from the first cylinder section 11, the prosthesis assembly is more stable under the load of normal pulling force, so that the third support rod 40 can enable the first external thread 12 and the bone cavity of the stump to be tightly combined, the risk of detachment can be effectively reduced, and thus, the fixation is easy and the fixation effect of the prosthesis component can be ensured.

As shown in fig. 4 to 16, in order to enable the first stay bar 20, the second stay bar 30 and the third stay bar 40 to be inserted into the second cylindrical section 14 and to enable one of the first stay bar, the second stay bar and the third stay bar to be abutted against the first cylindrical section 11, the diameter of the inner hole of the first cylindrical section 11 is smaller than that of the inner hole of the second cylindrical section 14. The internal bore of the second barrel section 14 is a threaded bore, wherein the first strut 20 further comprises a first screw section 22 that mates with the threaded bore when the first strut 20 is connected within the implantation barrel 10. The first screw section 22 can be screwed into the threaded bore of the second barrel section 14 for removable attachment. When the second strut 30 is attached within the implant 10, the second strut 30 further includes a second screw section 32 that mates with the threaded bore. In this way, the second screw section 32 can be screwed into the threaded bore of the second barrel section 14 for removable attachment. When the third strut 40 is connected within the implant 10, the third strut 40 includes a third screw section 42 that mates with the threaded bore. In this way, the third stay 40 can be screwed into the threaded hole of the second barrel section 14 for detachable connection.

As shown in fig. 14 to 16, the retaining structure includes a retaining ring groove 411 and a retaining protrusion 111 extending into the retaining ring groove 411. The retaining ring groove 411 is arranged on the outer wall of the third stay bar 40, and the retaining protrusion 111 is arranged on the hole wall of the first end of the first barrel section 11. After the third support rod 40 penetrates the end surface of the implantation tube 10, the retaining protrusion 111 extends into the retaining ring groove 411, the retaining protrusion 111 is clamped with the groove side wall of the retaining ring groove 411, the third support rod 40 is prevented from retreating from the first tube section 11, and the third support rod 40 is effectively kept in a state that the first external thread 12 and the stump bone cavity are tightly combined. The retaining ring groove 411 is engaged with the retaining protrusion 111, so that the structure is simple, the third support rod 40 is prevented from being loosened, and a double protection effect is achieved.

As shown in fig. 4 to 16, the inner hole of the first cylinder section 11 is a tapered hole, and the diameter of the inner hole of the first cylinder section 11 gradually increases from the first end to the second end of the first cylinder section 11. The third brace 40 further comprises a pole section 41 which is matched with the inner hole of the first barrel section 11, and the diameter of the pole section 41 is larger than or equal to the minimum value of the diameter of the inner hole of the first barrel section 11. Thus, the outer wall of the strut section 41 fits the inner bore of the first barrel section 11, and the third strut 40 can expand the first barrel section 11.

As shown in fig. 10, in order to facilitate the outward expansion of the first cylindrical section 11, a plurality of axial cuts are provided, and the plurality of axial cuts divide the first cylindrical section 11 into a plurality of petals 112. At least one of the petal bodies 112 includes a plurality of petal body units arranged along a direction from the first end to the second end of the first cylinder 11, and widths of two adjacent petal body units are not equal. Thus, the flap body unit having a small width deforms a large amount, and the flap body unit having a large width deforms a small amount. When first section of thick bamboo 11 expands outward and makes first external screw thread 12 on first section of thick bamboo 11 screw in to the inner wall of the bone chamber of different grade type in, guarantee that the axial incision struts unevenly, the shape that the hole after first section of thick bamboo 11 expands outward encloses is non-circular, like this, for the shape that the hole after first section of thick bamboo 11 expands outward encloses for circular, first section of thick bamboo 11 is difficult to rotate in the bone chamber, can improve implantation section of thick bamboo 10 and implant the back and resist the ability of unscrewing.

The width of the flap unit means the circumferential dimension of the flap unit. The unequal widths of two adjacent flap units can be illustrated in fig. 10, the width of the flap unit 112a is unequal to the width of the flap unit 112b, and the width of the flap unit 112b is unequal to the width of the flap unit 112 c.

As shown in fig. 10, the axial slits include a first axial slit 13 and a plurality of second axial slits 15. The first axial cuts 13 are arranged between two adjacent second axial cuts 15, the second axial cuts 15 are linear, and the first axial cuts 13 comprise curved segments 131. Thus, when the first cylinder section 11 expands outwards to screw the first external thread 12 on the first cylinder section 11 into the inner walls of different types of bone cavities, in the circumferential direction of the first cylinder section 11, the deformation of the part of the first cylinder section 11 located at the second axial cut 15 of the curved section 131 is greater than the deformation of the part of the first cylinder section 11 located at the linear first axial cut 13, so that the axial cut is ensured to be expanded unevenly, and the anti-unscrewing capacity of the implanted first external thread 12 is improved.

As shown in fig. 3, in a plan view of the first barrel section 11, two first axial slits 13 and four second axial slits 15 are divergent, the four second axial slits 15 are arranged to intersect, and the two first axial slits 13 are connected in a straight line.

As shown in fig. 10, there are a plurality of curve segments 131, and the protruding directions of two adjacent curve segments 131 are opposite. Like this, when first section of thick bamboo 11 expands outward and makes first external screw thread 12 on first section of thick bamboo 11 screw in to the inner wall of the bone cavity of different grade type, in the axial of first section of thick bamboo 11, the deformation position of the part that is located the opposite department of the protrusion direction of two adjacent curved sections 131 of first section of thick bamboo 11 is different, guarantees that the axial incision struts unevenly, is favorable to improving the anti-unscrewing ability after first external screw thread 12 implants.

As shown in fig. 10, the first axial slit 13 further includes a plurality of straight line segments 132, and each curved line segment 131 is disposed between two adjacent straight line segments 132. In this way, in the axial direction of the first cylindrical section 11, the deformation of the portion of the first cylindrical section 11 located at the curved section 131 is greater than the deformation of the portion of the first cylindrical section 11 located at the straight section 132, so that the axial incision can be ensured to be unevenly spread, and the anti-unscrewing capability of the implanted first external thread 12 can be improved.

As shown in fig. 4 to 15, the prosthesis assembly further includes a first sensor disposed at a side wall of the first strut 20, a second sensor disposed at a side wall of the second strut 30, and a third sensor disposed at a side wall of the third strut 40, wherein the first sensor, the second sensor, and the third sensor are alternatively connected to a controller outside the prosthesis assembly. The first sensor enables the side wall of the first support rod 20 to form a first mechanical sensing area, the second sensor enables the side wall of the second support rod 30 to form a second mechanical sensing area, the third sensor enables the side wall of the third support rod 40 to form a third mechanical sensing area, and when the first barrel section 11 presses the side wall of the first support rod 20, or when the first barrel section 11 presses the side wall of the second support rod 30, or when the first barrel section 11 presses the side wall of the third support rod 40, the controller displays a safety area when the opening force borne by the first barrel section 11 is between 10N M and 30N M. During a clinical procedure, the adapted first strut 20 may be replaced by the controller by receiving information from a first sensor, the controller may replace the adapted second strut 30 by receiving information from a second sensor, and the controller may replace the adapted third strut 40 by receiving information from a third sensor. The length of the first mechanical sensing area, the length of the second mechanical sensing area and the length of the third mechanical sensing area are all preferably 10 mm.

As shown in fig. 11, 13, 15, 17-20, the implant cartridge 10 further includes a third cartridge section 16 coupled to the second cartridge section 14, the third cartridge section 16 having an internal bore with a diameter greater than the diameter of the internal bore of the second cartridge section 14, and the prosthesis assembly further includes a closure element 50 disposed within the internal bore of the third cartridge section 16. The blocking piece 50 can block the inner hole of the third cylinder section 16, has a sealing effect, can separate the inside and the outside of a human body, and prevents external bacteria from invading the human body.

As shown in fig. 11, 13, 15, 17 to 20, the bore wall of the inner bore of the third barrel section 16 is provided with an internal thread, and the blocking element 50 comprises a first sealing element 51. The first sealing element 51 is provided with a second external thread matched with the internal thread, wherein the thread pitch of the internal thread is equal to that of the second external thread, the internal thread is made of metal, and the second external thread is made of plastic. In this way, the threads of the second external thread are fine threads, the threads of the internal thread are coarse threads, the fine threads play a guiding role during tapping along the coarse threads, and the first sealing element 51 is deformed due to self-tapping of the coarse threads, so that another coarse thread matched with the coarse threads is formed on the side wall of the first sealing element 51 in the screwing process of the first sealing element 51, so that the first sealing element 51 is fixedly connected in the inner hole of the third cylinder section 16, and a good sealing effect is exerted. Specifically, as shown in fig. 24, the pitch, lead angle, and thread profile of both the second external thread and the internal thread are identical, and the crest and root diameters of the threads are different. (e.g., 12mm crest and 14mm root of the internal thread; 13mm crest and 14mm root of the second external thread), the second external thread is preferably polyethylene plastic and deformable, and the diameter of the crest circle of the second external thread is equal to the diameter of the root circle of the internal thread, so that when the first sealing member 51 is screwed in, the polyethylene plastic deforms in the cross-lap area to fully perform the sealing function.

The material of the first seal 51 may preferably be PEEK (polyetheretherketone). The first seal member 51 is a gasket. In order to facilitate the disassembly and assembly, the end face of the sealing gasket is provided with a first operating hole, and the first operating hole is preferably a first hexagon socket hole.

As shown in fig. 11, 13, 15, 17-23, the closure 50 further includes a closure plug 52 disposed within the inner bore of the third barrel section 16. A plug 52 is located at the end of the first seal 51 remote from the second barrel section 14. The plug 52 is provided with a third external thread matching the internal thread. Wherein the pitch of the third external thread is equal to the pitch of the internal thread. In the process that the plug 52 is screwed into the inner hole of the third cylinder section 16, the first sealing element 51 is pressed, so that the first sealing element 51 is deformed more, the sealing effect of the first sealing element 51 is tighter, the inside and the outside of the human body are effectively isolated, and external bacteria are prevented from invading into the human body. For the convenience of disassembly and assembly, the end face of the plugging plug 52 is provided with a second operation hole, and the second operation hole is preferably a second hexagon socket hole.

As shown in fig. 11, 13 and 15, the inner bore of the third barrel section 16 and the inner bore of the second barrel section 14 have a step surface therebetween, and the prosthesis assembly further includes a second seal 60 disposed at the step surface. The second sealing element 60 is sealed at the step surface, so that the inside and the outside of the human body can be isolated, and external bacteria can be prevented from invading the human body. The implant cartridge 10 further includes a fourth cylindrical section 17 connected between the second cylindrical section 14 and the third cylindrical section 16, the fourth cylindrical section 17 having an outer diameter less than the outer diameter of the second cylindrical section 14. An annular groove for mounting the second seal 60 is provided at the step surface. The second seal 60 is preferably a silicone rubber ring. Specifically, the diameter of the inner bore of the fourth cylindrical section 17 is smaller than the diameter of the inner bore of the third cylindrical section 16, and the step surface is formed between the inner bore of the fourth cylindrical section 17 and the inner bore of the third cylindrical section 16. The third barrel section 16 is an interface section to facilitate connection of the implant barrel 10 to an external prosthesis. The first, second, third and fourth

cylindrical sections

11, 14, 16, 17 are preferably made of medical stainless steel.

As shown in FIG. 1, the length A2 of the second barrel section 14 is in the range of 20mm to 30mm, the length A3 of the fourth barrel section 17 is in the range of 10mm to 20mm, and the length A4 of the third barrel section 16 is in the range of 10mm to 20 mm.

As shown in fig. 2, the thread height a1 of the first external thread 12 is in the range of 2mm to 3mm, the distance D2 between two oppositely disposed retaining protrusions 111 of the plurality of retaining protrusions 111 is in the range of 3mm to 5mm, the diameter D1 of the top of the inner bore of the first barrel section 11, wherein D1 ═ D2+ (1 mm to 2 mm), the outer diameter D3 of the first external thread 12, and the diameter D4 of the second barrel section 14, wherein D4 ═ D3- (0.5 mm to 1 mm).

As shown in fig. 9, in order to facilitate the entry of the third support bar 40 into the cavity of the residual bone, the end of the third support bar 40 remote from the post segment 41 is provided with a third taper segment, and the taper a5 of the third taper segment is between 10 ° and 30 °.

In this embodiment, the outer surface of the second cylinder section 14 is a porous structure formed by 3D printing for biological fixation, thereby facilitating bone ingrowth and making the fixation of the implant cylinder 10 more reliable. The outer surface of the fourth barrel section 17 is smooth, highly polished and coated with an antimicrobial wear resistant coating.

The prosthesis assembly of this embodiment is installed in two ways: firstly, a first cylinder section 11 and a second cylinder section 14 of an implantation cylinder 10 are inserted into a bone cavity of a residual limb during operation, a third cylinder section 16 directly extends out of the body through soft tissues and skin, an external artificial limb is installed on the third cylinder section 16 through an intermediate connector, wherein a fourth cylinder section 17 is positioned at the inner-outer junction of the residual limb of a patient, and preferably, the part of the fourth cylinder section 17 exposed out of the body is at least 5mm long; secondly, inserting the first tube section 11 and the second tube section 14 of the implantation tube 10 into a bone cavity of the stump during operation, sewing the whole prosthesis assembly in the stump skin, performing a second operation after the prosthesis assembly is firmly combined with the bone of the stump, stripping the third tube section 16, and extending out of the human body through soft tissues and skin, wherein the fourth tube section 17 is positioned at the inner and outer junction of the stump of the patient; after the implant shaft 10 has been brought into engagement with the bone and skin interface to form a secure connection, the external prosthesis is mounted on the third shaft section 16 via the intermediate connection body.

The prosthesis assembly of the present embodiment is specifically mounted as follows:

1. selecting a first support rod 20, a second support rod 30 or a third support rod 40 and an implantation cylinder 10 with proper diameters through preoperative measurement;

2. pre-drilling a bottom hole at the bottom of the stump;

3. screwing the implant cartridge 10 into a predetermined position;

4. alternatively, the first brace 20, the second brace 30 or the third brace 40 is screwed into the implantation tube 10, because the diameter of the first brace 20, the second brace 30 or the third brace 40 is larger than the inner hole diameter of the first tube section 11 of the implantation tube 10, so that the first tube section 11 is expanded;

5. the silicone rubber ring seals inside and outside the step face and can be isolated from the human body, prevents that outside bacterium from invading the human body, wherein, when third vaulting pole 40 screw in is implanted in a section of thick bamboo 10, the block effect is realized with stopping protruding 111 to stopping annular groove 411, prevents that third vaulting pole 40 from loosening and takes off, plays the dual protection effect.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and in the case of not making a reverse description, these orientation words do not indicate and imply that the device or element being referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A prosthesis assembly, comprising:

the implantation barrel (10) is provided with a first barrel section (11), a first external thread (12) is arranged on the outer wall of the first barrel section (11), an axial cut is arranged on the first barrel section (11), and the axial cut penetrates through the inner surface and the outer surface of the first barrel section (11);

a first support rod (20) and a second support rod (30), wherein the first support rod (20) and the second support rod (30) are alternatively and detachably connected in the implantation cylinder (10), the end part of the first support rod (20) is positioned in the implantation cylinder (10) and has a preset distance (D) with the end surface of the first cylinder section (11), and the second support rod (30) penetrates out of the end surface of the implantation cylinder (10),

wherein the first stay bar (20) or the second stay bar (30) is in abutting fit with the first barrel section (11) to outwardly expand the first barrel section (11);

the axial cuts comprise a first axial cut (13) and a plurality of second axial cuts (15), the first axial cut (13) is arranged between two adjacent second axial cuts (15), the second axial cuts (15) are linear, and the first axial cut (13) comprises a curved section (131).

2. The prosthesis assembly of claim 1,

the implantation cartridge (10) further comprising a second cartridge section (14) connected to the first cartridge section (11), the first cartridge section (11) having a first end distal to the second cartridge section (14) and a second end proximal to the second cartridge section (14), the axial cut extending from the first end of the first cartridge section (11) to the second end of the first cartridge section (11),

wherein a portion of the first strut (20) is located within the second barrel section (14) and connected to the second barrel section (14) when the first strut (20) is connected within the implantation barrel (10), and a portion of the second strut (30) is located within the second barrel section (14) and connected to the second barrel section (14) when the second strut (30) is connected within the implantation barrel (10).

3. A prosthesis component as claimed in claim 2, wherein the bore of the first cylinder section (11) is a tapered bore, the diameter of the bore of the first cylinder section (11) increases gradually from the first end to the second end of the first cylinder section (11), the first strut (20) comprises a first tapered rod section (21) matched with the first cylinder section (11), the second strut (30) comprises a second tapered rod section (31) matched with the first cylinder section (11), and the taper of the first tapered rod section (21) and the taper of the second tapered rod section (31) are both smaller than or equal to the taper of the bore of the first cylinder section (11).

4. A prosthesis assembly according to claim 2, further comprising a third strut (40), said first (20), second (30) and third (40) struts being alternatively and detachably connected within said implant (10), said third strut (40) extending through an end face of said implant (10), wherein said third strut (40) is in abutting engagement with said first cylinder section (11) to outwardly expand said first cylinder section (11), and wherein a backstop structure is provided between said third strut (40) and said first cylinder section (11).

5. The prosthesis assembly of claim 4,

the diameter of the inner hole of the first cylinder section (11) is smaller than that of the inner hole of the second cylinder section (14), the inner hole of the second cylinder section (14) is a threaded hole,

wherein, when the first stay (20) is connected in the implantation tube (10), the first stay (20) further comprises a first screw section (22) matched with the threaded hole, when the second stay (30) is connected in the implantation tube (10), the second stay (30) further comprises a second screw section (32) matched with the threaded hole, when the third stay (40) is connected in the implantation tube (10), the third stay (40) comprises a third screw section (42) matched with the threaded hole;

the prosthesis component further comprises a first sensor arranged on the side wall of the first support rod (20), a second sensor arranged on the side wall of the second support rod (30) and a third sensor arranged on the side wall of the third support rod (40), wherein the first sensor, the second sensor and the third sensor are alternatively connected with a controller outside the prosthesis component.

6. A prosthesis component as claimed in claim 4, wherein said retaining structure comprises a retaining ring groove (411) and a retaining protrusion (111) extending into said retaining ring groove (411), said retaining ring groove (411) being provided on the outer wall of said third strut (40), said retaining protrusion (111) being provided on the wall of the bore of the first end of said first barrel section (11).

7. A prosthesis component according to claim 4, wherein the inner bore of the first cylinder section (11) is a tapered bore, the diameter of the inner bore of the first cylinder section (11) increases gradually from the first end to the second end of the first cylinder section (11), the third strut (40) further comprises a strut section (41) which is matched with the inner bore of the first cylinder section (11), and the diameter of the strut section (41) is larger than or equal to the minimum value of the diameter of the inner bore of the first cylinder section (11).

8. A prosthesis component as claimed in claim 2, wherein said axial cut is a plurality of axial cuts dividing said first cylinder section (11) into a plurality of petals (112), wherein at least one of said petals (112) comprises a plurality of petal units arranged in a direction from a first end to a second end of said first cylinder section (11), the widths of adjacent two of said petal units being unequal.

9. The prosthesis assembly according to claim 1, wherein said curved segments (131) are plural, and the projecting directions of two adjacent curved segments (131) are opposite.

10. The prosthesis assembly according to claim 1, wherein the first axial incision (13) further comprises a plurality of straight line segments (132), each of the curved line segments (131) being disposed between two adjacent straight line segments (132).

11. The prosthesis assembly according to claim 2, wherein the implant cartridge (10) further comprises a third cartridge section (16) connected to the second cartridge section (14), the third cartridge section (16) having an internal bore with a diameter greater than the diameter of the internal bore of the second cartridge section (14), the prosthesis assembly further comprising a closure (50) disposed within the internal bore of the third cartridge section (16).

12. The prosthesis assembly of claim 11,

an internal thread is arranged on the hole wall of the inner hole of the third cylinder section (16), the plugging piece (50) comprises a first sealing piece (51), a second external thread matched with the internal thread is arranged on the first sealing piece (51), the thread pitch of the internal thread is equal to that of the second external thread, the internal thread is made of metal, and the second external thread is made of plastic;

the plugging piece (50) further comprises a plug (52) arranged in an inner hole of the third cylinder section (16), the plug (52) is positioned at one end, away from the second cylinder section (14), of the first sealing piece (51), and a third external thread matched with the internal thread is arranged on the plug (52), wherein the pitch of the third external thread is equal to that of the internal thread;

a step surface is arranged between the inner hole of the third cylinder section (16) and the inner hole of the second cylinder section (14), and the prosthesis assembly further comprises a second sealing element (60) arranged at the step surface;

the implantation cartridge (10) further comprises a fourth cartridge section (17) connected between the second cartridge section (14) and the third cartridge section (16), the outer diameter of the fourth cartridge section (17) being smaller than the outer diameter of the second cartridge section (14).