CN112494178A - Expansion type fixed femoral stem prosthesis - Google Patents

Expansion type fixed femoral stem prosthesis Download PDF

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Publication number
CN112494178A
CN112494178A CN202011463091.4A CN202011463091A CN112494178A CN 112494178 A CN112494178 A CN 112494178A CN 202011463091 A CN202011463091 A CN 202011463091A CN 112494178 A CN112494178 A CN 112494178A
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CN
China
Prior art keywords
femoral stem
hole
distal
femoral
rod
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Pending
Application number
CN202011463091.4A
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Chinese (zh)
Inventor
陈立叶
蒋鹏
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Beijing Zhong An Tai Hua Science & Technology Co ltd
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Beijing Zhong An Tai Hua Science & Technology Co ltd
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Priority to CN202011463091.4A priority Critical patent/CN112494178A/en
Publication of CN112494178A publication Critical patent/CN112494178A/en
Pending legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2/3676—Distal or diaphyseal parts of shafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/28—Bones
    • A61F2002/2825—Femur
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/30—Joints
    • A61F2/32—Joints for the hip
    • A61F2/36—Femoral heads ; Femoral endoprostheses
    • A61F2/3662—Femoral shafts
    • A61F2002/3678—Geometrical features
    • A61F2002/368—Geometrical features with lateral apertures, bores, holes or openings, e.g. for reducing the mass, for receiving fixation screws or for communicating with the inside of a hollow shaft

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  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Cardiology (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Transplantation (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Vascular Medicine (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Prostheses (AREA)

Abstract

The application relates to an expansion type fixed femoral stem prosthesis, which comprises a proximal femoral stem end, a distal femoral stem end and a neck of the femoral stem, wherein a distal taper hole penetrating through the distal femoral stem end is formed in the distal femoral stem end, a fracture in the length direction of the distal femoral stem end is formed on the outer side surface of the distal femoral stem end, and the distal femoral stem end is divided into at least two parts through the fracture; the femoral shaft expansion device further comprises an expansion piece which is positioned in the distal taper hole and used for expanding the distal end of the femoral shaft outwards. The distal end of the femoral stem is divided into at least two parts through the fracture, and then the distal end of the femoral stem is expanded through the expansion piece matched with the distal taper hole. When the femoral stem prosthesis is installed, the distal end of the femoral stem can be in a furled state, the femoral stem prosthesis is inserted into a femoral medullary cavity, and then the distal end of the femoral stem is unfolded through the expansion piece, so that the distal end of the femoral stem is abutted against the inner wall of the femoral medullary cavity, and the femoral stem prosthesis and the femur are relatively fixed.

Description

Expansion type fixed femoral stem prosthesis
Technical Field
The application relates to the field of femoral stem prostheses, in particular to an expansion type fixed femoral stem prosthesis.
Background
In the current artificial hip joint replacement operation, the fixing modes of the femoral stem prosthesis and the human femur are divided into a biological fixing type prosthesis and a cement fixing type prosthesis. The fixing principle of the biological fixing type prosthesis is mechanical press fit fixing, a fixed press fit size is reserved between the designed femoral stem and the size of a femoral medullary cavity processed by using an instrument, after the prosthesis is driven into the femoral medullary cavity, pressure is generated by means of elastic deformation of the femoral medullary cavity and the surface of the contained femoral stem, and friction force is generated by means of the pressure to enable the femoral stem prosthesis to be fixed in the medullary cavity.
In the related art, the fixed press fit size cannot adapt to patients with different bone substances, the same press fit size may have difficulty in driving into patients with harder bone substances and even risk of bone fracture, and the fixed press fit size can also be infirm for patients with osteoporosis, so that the initial stability of the prosthesis is affected, and the prosthesis is loosened.
Disclosure of Invention
In order to adapt to patients with various different sclerotins, the application provides an expansion type fixed femoral stem prosthesis.
The application provides a fixed type femoral stem prosthesis of inflation formula adopts following technical scheme:
an expansion type fixed femoral stem prosthesis comprises a proximal femoral stem end, a distal femoral stem end and a neck of the femoral stem, wherein a distal taper hole penetrating through the distal femoral stem end is formed inside the distal femoral stem end, a fracture in the length direction of the distal femoral stem end is formed on the outer side surface of the distal femoral stem end, and the distal femoral stem end is divided into at least two parts through the fracture; the femoral shaft expansion device further comprises an expansion piece which is positioned in the distal taper hole and used for expanding the distal end of the femoral shaft outwards.
By adopting the technical scheme, the fracture is divided into at least two parts by listening to the distal end of the femoral stem, and then the distal end of the femoral stem is propped open by matching the expansion piece with the distal taper hole. When the femoral stem prosthesis is installed, the distal end of the femoral stem can be in a furled state, the femoral stem prosthesis is inserted into a femoral medullary cavity, and then the distal end of the femoral stem is unfolded through the expansion piece, so that the distal end of the femoral stem is abutted against the inner wall of the femoral medullary cavity, and the femoral stem prosthesis and the femur are relatively fixed.
Preferably, an internal threaded hole is formed in one side, away from the distal end of the femoral stem, of the proximal end of the femoral stem, a proximal through hole penetrating through the proximal end of the femoral stem is formed in the bottom of the internal threaded hole, the proximal through hole is communicated with a distal taper hole, and the diameter of the distal taper hole is gradually reduced from the position communicated with the proximal through hole to the direction away from the proximal through hole; the expansion piece comprises an external thread piece and a straight rod integrally formed on one end face of the external thread piece, and the diameter of the straight rod is equal to the inner diameter of the near-end through hole.
Through adopting above-mentioned technical scheme, external screw thread spare through the inflation piece cooperates with the internal thread hole for the inflation piece is at the direction motion of relative internal thread hole rotatory in-process straight-bar to distal end taper hole, struts the femoral stem distal end. The proximal through hole is used as an operation hole to facilitate the rotation of the operation expansion piece.
Preferably, one end of the straight rod, which is far away from the external thread piece, is formed with a tapered rod with the diameter gradually decreasing towards the direction far away from the external thread piece.
Through adopting above-mentioned technical scheme, set up the toper pole and come the cooperation distal end taper hole and make the toper pole prop open the femoral stem distal end to the direction of distal end taper hole, have great contact surface between toper pole and the distal end taper hole inner wall, the structure is more stable. And the fine adjustment of the distraction amplitude of the distal end of the femoral stem can be realized by the relative rotation of the external thread piece and the internal thread hole and the combination of the two conical surface matching structures.
Preferably, an inner hexagonal groove is formed at one end of the external thread element, which is back to the straight rod.
Through adopting above-mentioned technical scheme, make to operate external screw thread spare through the instrument conveniently and rotate through setting up hexagon socket head cap groove.
Preferably, the lateral surface shaping of femoral stem distal end has the annular overhead kick of multichannel, and the one side that the overhead kick was kept away from the femoral stem near-end inclines towards the femoral stem near-end direction to keeping away from the femoral stem distal end direction.
By adopting the technical scheme, when the barb is arranged to be attached to the inner wall of the femoral medullary cavity, the barb can deform to be attached to the inner wall of the femoral medullary cavity. Meanwhile, as the femoral medullary cavity is not a smooth surface, the hook-shaped structure formed after the deformation of the barb can also be matched with the inner wall of the femoral medullary cavity to play a better role in stabilizing the femoral stem prosthesis.
Preferably, a circular near-end through hole is formed in one side, away from the far end of the femoral stem, of the near-end of the femoral stem, an internal threaded hole is formed in the bottom of the near-end through hole, a far-end straight hole located inside the far end of the femoral stem is formed in the bottom of the internal threaded hole, and the far-end straight hole is communicated with the far-end taper hole; the expansion piece comprises a movable rod, the movable rod comprises an external thread rod matched with the internal thread hole and a push rod connected to one end of the external thread rod, and the push rod is in a conical shape matched with the distal end conical hole.
Through adopting above-mentioned technical scheme, set up the movable rod and pass through external screw thread pole and internal thread hole cooperation for the external screw thread pole drives the ejector pin motion when rotating, makes ejector pin cooperation distal end taper hole strut the femoral stem distal end fixed with femoral medullary cavity inner wall butt.
Preferably, the expansion piece further comprises a rotating sleeve rotatably connected with the near-end through hole, an inner hexagonal groove is formed in one side, facing the outside of the near-end through hole, of the rotating sleeve, and a guide hole is formed in one side, facing away from the inner hexagonal groove, of the rotating sleeve; the end face of the external thread rod, which is back to the ejector rod, is formed with a guide rod, and the guide rod and the guide hole can only move relatively along the length of the guide rod.
Through adopting above-mentioned technical scheme, cover the movable rod in femoral stem prosthesis through setting up rotatory cover. Because guide bar and guiding hole only can follow the length direction relative motion of guide bar, consequently can drive the movable rod and rotate together when the swivel sleeve rotates, along the length direction motion in internal thread hole when the movable rod rotates. Because the guide rod and the guide hole can move relatively along the length direction, the movable rod is not dead.
Preferably, the diameter of the distal taper hole is gradually reduced towards the direction far away from the distal straight hole, and the diameter of the ejector rod is gradually reduced towards the direction far away from the external thread rod.
Through adopting above-mentioned technical scheme, set up distal end taper hole and ejector pin and all reduce towards the direction diameter of femoral stem distal end tip gradually for the distal end taper hole struts under the effect of inflation spare and can closely fix femoral stem prosthesis and thighbone after with femoral medullary intracavity wall butt. Meanwhile, the movable rod moves downwards under the action of ordinary gravity, namely moves towards the distal end of the femoral stem, so that the distal end of the femoral stem can be kept in a spread state all the time.
In summary, the present application includes at least one of the following beneficial technical effects:
1. when the femoral stem prosthesis is installed, the distal end of the femoral stem can be in a furled state, the femoral stem prosthesis is inserted into a femoral medullary cavity, and then the distal end of the femoral stem is unfolded through the expansion piece, so that the distal end of the femoral stem is abutted against the inner wall of the femoral medullary cavity, and the femoral stem prosthesis and the femur are relatively fixed.
2. The conical rod is arranged to be matched with the distal-end conical hole, so that when the conical rod props the distal end of the femoral stem open towards the distal-end conical hole, a larger contact surface is formed between the conical rod and the inner wall of the distal-end conical hole, and the structure is more stable; and the fine adjustment of the distraction amplitude of the distal end of the femoral stem can be realized by the relative rotation of the external thread piece and the internal thread hole and the combination of the two conical surface matching structures.
Drawings
FIG. 1 is a schematic structural diagram of the first embodiment;
FIG. 2 is a schematic cross-sectional view of the first embodiment;
FIG. 3 is a schematic structural view of the second embodiment;
FIG. 4 is a schematic sectional view of the second embodiment.
Description of reference numerals: 1. a proximal femoral stem end; 2. a femoral stem distal end; 3. a femoral stem neck; 4. an expansion member; 5. an internally threaded bore; 6. a proximal through hole; 7. a distal taper hole; 8. an external screw member; 9. a straight rod; 10. a top rod; 11. an inner hexagonal groove; 12. chamfering; 13. breaking off; 14. a rotating sleeve; 15. a movable rod; 16. a guide hole; 17. a guide bar; 18. an externally threaded rod; 19. a distal straight bore.
Detailed Description
The present application is described in further detail below with reference to figures 1-4.
The embodiment of the application discloses fixed type femoral stem prosthesis of inflation formula.
The first embodiment is as follows:
as shown in fig. 1 and 2, the expansion-type fixed-type femoral stem prosthesis includes a proximal femoral stem end 1, a distal femoral stem end 2, a femoral stem neck 3, and an expansion member 4. Wherein, an internal thread hole 5 is formed on one side of the proximal end 1 of the femoral stem far away from the distal end 2 of the femoral stem, a proximal through hole 6 penetrating through the proximal end 1 of the femoral stem is formed at the bottom of the internal thread hole 5, and the proximal through hole 6 is a through hole with the same diameter at each position. The bottom of the near-end through hole 6 is formed with a far-end taper hole 7 penetrating through the far end 2 of the femoral stem, and the diameter of the far-end taper hole 7 is gradually reduced from the position communicated with the near-end through hole 6 to the direction far away from the near-end through hole 6.
As shown in fig. 2, the expansion member 4 includes an external screw member 8 and a straight rod 9 integrally formed on one end surface of the external screw member 8, the diameter of the straight rod 9 is equal to the inner diameter of the distal taper hole 7, and an ejector rod 10 having a diameter gradually decreasing toward a direction away from the external screw member 8 is formed on one end of the straight rod 9 away from the external screw member 8. One end of the external thread element 8, which is back to the straight rod 9, is formed with an inner hexagonal groove 11 which is convenient for operating the rotation of the external thread element 8.
As shown in fig. 1 and 2, a plurality of annular barbs 12 are formed on the outer side surface of the distal end 2 of the femoral stem, and one side of the barbs 12 away from the proximal end 1 of the femoral stem inclines towards the proximal end 1 of the femoral stem from the direction away from the distal end 2 of the femoral stem. The outer side surface of the distal end 2 of the femoral stem is formed with a fracture 13 which evenly divides the distal end 2 of the femoral stem into four parts along the length direction of the distal end 2 of the femoral stem.
The specific using process is as follows:
the femoral stem prosthesis is inserted into a femoral medullary cavity, the expansion piece 4 is inserted into the femoral stem prosthesis, and the ejector rod 10 is matched with the distal taper hole 7 to expand the distal end 2 of the femoral stem so that the barb 12 is attached to the inner wall of the femoral medullary cavity. The barb 12 can be slightly deformed towards the proximal end 1 of the femoral stem when being pressed, and the barb 12 is pressed and attached to the inner wall of the femoral medullary cavity to provide friction force so that the femoral stem prosthesis is fixed with the femur. Meanwhile, as the femoral medullary cavity is not a smooth surface, the hook-shaped structure formed after the deformation of the barb 12 can also be matched with the inner wall of the femoral medullary cavity to play a better role in stabilizing the femoral stem prosthesis.
Example two:
as shown in fig. 3 and 4, the expansion-type fixed-type femoral stem prosthesis includes a proximal femoral stem end 1, a distal femoral stem end 2, a femoral stem neck 3, and an expansion member 4. Wherein, a round near-end through hole 6 is formed on one side of the near-end 1 of the femoral stem far-end 2, an internal thread hole 5 is formed at the bottom of the near-end through hole 6, and a far-end straight hole 19 positioned inside the distal-end 2 of the femoral stem is formed at the bottom of the internal thread hole 5. The bottom of the far-end straight hole 19 is formed with a far-end taper hole 7 which penetrates through the far end 2 of the femoral stem, and the diameter of the far-end taper hole 7 is gradually reduced towards the direction far away from the far-end straight hole 19.
As shown in fig. 4, the expansion member 4 includes a rotary sleeve 14 rotatably coupled to the proximal through-hole 6 and a movable rod 15 engaged with the rotary sleeve 14. The side of the rotating sleeve 14 facing the outside of the proximal through hole 6 is formed with an inner hexagonal groove 11, and the side of the rotating sleeve 14 facing away from the inner hexagonal groove 11 is formed with a guide hole 16 with a square section. The movable rod 15 includes a guide rod 17 located in the guide hole 16, and the cross section of the guide rod 17 is square matched with the guide hole 16, so that the guide rod 17 can slide along the length direction of the guide hole 16. The movable rod 15 comprises an external threaded rod 18 integrally formed at one end of the guide rod 17 far away from the rotary sleeve 14, and the external threaded rod 18 is in fit connection with the internal threaded hole 5. The end of the external screw rod 18 far away from the guide rod 17 is integrally formed with the ejector rod 10, and the diameter of the ejector rod 10 gradually decreases toward the direction far away from the external screw rod 18.
As shown in fig. 3 and 4, a plurality of annular barbs 12 are formed on the outer side surface of the distal end 2 of the femoral stem, and one side of the barbs 12 away from the proximal end 1 of the femoral stem inclines towards the proximal end 1 of the femoral stem from the direction away from the distal end 2 of the femoral stem. The outer side surface of the distal end 2 of the femoral stem is formed with a fracture 13 which evenly divides the distal end 2 of the femoral stem into four parts along the length direction of the distal end 2 of the femoral stem.
The specific using process is as follows:
the femoral stem prosthesis is inserted into a femoral medullary cavity, then the rotating sleeve 14 is rotated, the rotating sleeve 14 drives the movable rod 15 to rotate in the rotating process, and the external threaded rod 18 is matched with the internal threaded hole 5 in the rotating process of the movable rod 15, so that the movable rod 15 moves towards the proximal end 1 of the femoral stem. The mandril 10 is matched with the distal taper hole 7 to prop open the distal end 2 of the femoral stem, and the barb 12 is abutted against the inner wall of the femoral medullary cavity to deform so as to fix the femoral stem prosthesis and the femur.
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.

Claims (8)

1. The utility model provides a fixed type femoral stem prosthesis of inflation formula, includes femoral stem near-end (1), femoral stem distal end (2) and femoral stem neck (3), characterized by: a distal taper hole (7) penetrating through the distal end (2) of the femoral stem is formed in the distal end (2) of the femoral stem, a fracture (13) along the length direction of the distal end (2) of the femoral stem is formed on the outer side surface of the distal end (2) of the femoral stem, and the distal end (2) of the femoral stem is divided into at least two parts through the fracture (13); the femoral shaft further comprises an expansion piece (4) which is positioned in the distal taper hole (7) and outwards expands the distal end (2) of the femoral shaft.
2. The expansion-type fixed femoral stem prosthesis according to claim 1, wherein: an internal threaded hole (5) is formed in one side, away from the distal end (2), of the femoral stem near end (1), a near end through hole (6) penetrating through the femoral stem near end (1) is formed in the bottom of the internal threaded hole (5), the near end through hole (6) is communicated with a distal end taper hole (7), and the diameter of the distal end taper hole (7) is gradually reduced from the position communicated with the near end through hole (6) to the direction away from the near end through hole (6); the expansion piece (4) comprises an external thread piece (8) and a straight rod (9) integrally formed on one end face of the external thread piece (8), and the diameter of the straight rod (9) is equal to the inner diameter of the near-end through hole (6).
3. The expansion-type fixed femoral stem prosthesis according to claim 2, wherein: one end of the straight rod (9) far away from the external thread piece (8) is formed with a conical rod with the diameter gradually reduced towards the direction far away from the external thread piece (8).
4. The expansion-type fixed femoral stem prosthesis according to claim 2, wherein: an inner hexagonal groove (11) is formed in one end, back to the straight rod (9), of the external thread piece (8).
5. The expansion-type fixed femoral stem prosthesis according to claim 1, wherein: the lateral surface shaping of femoral stem distal end (2) has multichannel annular barb (12), and one side that femoral stem near-end (1) was kept away from in barb (12) is to keeping away from femoral stem distal end (2) direction toward femoral stem near-end (1) direction slope.
6. The expansion-type fixed femoral stem prosthesis according to claim 1, wherein: a round near-end through hole (6) is formed in one side, away from the far end (2) of the femoral stem, of the femoral stem near end (1), an internal threaded hole (5) is formed in the bottom of the near-end through hole (6), a far-end straight hole (19) located inside the femoral stem far end (2) is formed in the bottom of the internal threaded hole (5), and the far-end straight hole (19) is communicated with a far-end taper hole (7); the expansion piece (4) comprises a movable rod (15), the movable rod (15) comprises an external threaded rod (18) matched with the internal threaded hole (5) and a mandril (10) connected to one end of the external threaded rod (18), and the mandril (10) is in a conical shape matched with the distal end taper hole (7).
7. The expansion-type fixed femoral stem prosthesis according to claim 6, wherein: the expansion piece (4) further comprises a rotating sleeve (14) rotatably connected with the near-end through hole (6), an inner hexagonal groove (11) is formed in one side, facing the outside of the near-end through hole (6), of the rotating sleeve (14), and a guide hole (16) is formed in one side, back to the inner hexagonal groove (11), of the rotating sleeve (14); the end face of the external thread rod (18) back to the ejector rod (10) is formed with a guide rod (17), and the guide rod (17) and the guide hole (16) can only move relatively along the length of the guide rod (17).
8. The expansion-type fixed femoral stem prosthesis according to claim 7, wherein: the diameter of the far-end taper hole (7) is gradually reduced towards the direction far away from the far-end straight hole (19), and the diameter of the ejector rod (10) is gradually reduced towards the direction far away from the external thread rod (18).
CN202011463091.4A 2020-12-12 2020-12-12 Expansion type fixed femoral stem prosthesis Pending CN112494178A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011463091.4A CN112494178A (en) 2020-12-12 2020-12-12 Expansion type fixed femoral stem prosthesis

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011463091.4A CN112494178A (en) 2020-12-12 2020-12-12 Expansion type fixed femoral stem prosthesis

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Publication Number Publication Date
CN112494178A true CN112494178A (en) 2021-03-16

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113317911A (en) * 2021-06-04 2021-08-31 张丽君 Pressure expansion type femoral stem
CN113456304A (en) * 2021-05-20 2021-10-01 北京中安泰华科技有限公司 3D prints full hip joint system of double acting high abrasion
CN116725748A (en) * 2023-08-08 2023-09-12 北京爱康宜诚医疗器材有限公司 Insertion type prosthesis

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113456304A (en) * 2021-05-20 2021-10-01 北京中安泰华科技有限公司 3D prints full hip joint system of double acting high abrasion
CN113317911A (en) * 2021-06-04 2021-08-31 张丽君 Pressure expansion type femoral stem
CN116725748A (en) * 2023-08-08 2023-09-12 北京爱康宜诚医疗器材有限公司 Insertion type prosthesis
CN116725748B (en) * 2023-08-08 2023-11-24 北京爱康宜诚医疗器材有限公司 Insertion type prosthesis

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