CN110934668A - Femoral stem - Google Patents
Femoral stem Download PDFInfo
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- CN110934668A CN110934668A CN201911187636.0A CN201911187636A CN110934668A CN 110934668 A CN110934668 A CN 110934668A CN 201911187636 A CN201911187636 A CN 201911187636A CN 110934668 A CN110934668 A CN 110934668A
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- hole
- femoral stem
- blind hole
- thread
- unit
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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
-
- 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
- A61F2/367—Proximal or metaphyseal 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
- A61F2/30—Joints
- A61F2/32—Joints for the hip
- A61F2/36—Femoral heads ; Femoral endoprostheses
- A61F2/3662—Femoral shafts
- A61F2/3672—Intermediate 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
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30818—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves castellated or crenellated
-
- 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
- A61F2002/369—Stepped shaft, i.e. having discrete diameter changes
Landscapes
- 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)
- Surgical Instruments (AREA)
Abstract
The invention discloses a femoral stem, which comprises a main body structure, a bulging structure and an extrusion screw rod, wherein a blind hole and a bulging structure movable hole are arranged in the main body structure, the bulging structure comprises a bone pricking unit and a connecting unit, and the connecting unit comprises a positioning surface and a guide inclined surface. The invention adopts a combined structural design, the main body structure, the bulging structure and the extrusion screw are matched for use, the extrusion screw is screwed into the through hole and the blind hole, and when the guide thread and the positioning thread are matched and connected with each other, the bone pricking unit extends out of the bulging structure movable hole and pricks into the bone. The mode of extending the lug through expansion can effectively increase the stability during installation and retention, so that the femoral stem with a long and thin structure is not required to be designed, the femoral stem is prevented from being easily broken due to stress concentration, the moment is reduced, the strength of the femoral stem is improved, and the service life of the femoral stem is prolonged.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to a femoral stem.
Background
For the situation that the patient is difficult to walk and can not normally live due to injury, pathological changes and the like of the hip joint, the prior art adopts a method of artificial hip joint replacement operation for treatment. The femoral head necrosis of the hip joint is a common condition, the artificial hip joint replacement operation is to cut the necrotic femoral head, place a femoral stem into the femoral bone marrow cavity of a patient in an interference mode, fix the femoral stem by bone cement, and finally install a ball on the femoral stem to replace the original femoral head.
However, the conventional femoral stem is fixed by bone cement during installation, so that the fixation of a patient with osteoporosis is difficult to achieve, the conventional femoral stem is slender and is implanted into a host, secondary operation is required after fracture occurs, the slender femoral stem is forcibly pulled out and repaired, and the damage to the patient is large.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the femoral stem provided by the invention has the advantages that the stability in installation and retention is improved in a mode of expanding the protruding block, so that the femoral stem with a long and thin structure is not required to be designed, the femoral stem is prevented from being easily broken due to stress concentration, the moment is reduced, the strength of the femoral stem is improved, and the service life of the femoral stem is prolonged.
A femoral stem according to an embodiment of the present invention includes:
the main body structure comprises a fixing part and a supporting part which are sequentially connected, wherein a blind hole is formed in the bottom of the fixing part, an internal thread is formed in the inner side wall of the blind hole, an expanded structure moving hole is formed in the outer side wall of the fixing part, the expanded structure moving hole is communicated with the blind hole, a through hole is formed in the side wall of the supporting part along the top surface direction of the supporting part, the internal thread which is the same as the blind hole is formed in the inner side wall of the through hole, and the through hole is communicated with the blind hole and has the same diameter;
the expansion structure comprises a bone pricking unit and a connecting unit, the connecting unit is inserted into a movable hole of the expansion structure, the bone pricking unit is arranged on one side, far away from the blind hole, of the connecting unit, one side, close to the blind hole, of the connecting unit is a connecting surface, the connecting surface comprises a positioning surface and a guide inclined surface connected to the bottom side of the positioning surface, the guide inclined surface inclines from bottom to top along the direction close to the blind hole, positioning threads are arranged on the positioning surface, and guide threads are arranged on the guide inclined surface;
the extrusion screw, the top surface of extrusion screw is equipped with the hexagon recess, extrusion screw's lateral wall is equipped with the external screw thread, the external screw thread with the internal thread location screw thread guide thread looks adaptation, the guide thread with when location screw thread is mutually supported and is connected, the unit stretches out is pricked to the skeleton the structure activity hole of bulging.
The femoral stem provided by the embodiment of the invention has at least the following beneficial effects:
adopt modular structural design's femoral stem, cooperate major structure, the structure of expanding and extrusion screw rod to use, through extrusion screw rod screw in the through-hole with the blind hole, work as the guide thread with when location screw thread is mutually supported and is connected, the unit stretches out is pricked to the skeleton the structure activity hole of expanding to prick into the skeleton. The mode of extending the lug through expansion can effectively increase the stability during installation and retention, so that the femoral stem with a long and thin structure is not required to be designed, the femoral stem is prevented from being easily broken due to stress concentration, the moment is reduced, the strength of the femoral stem is improved, and the service life of the femoral stem is prolonged.
According to some embodiments of the invention, the bulge structure movable hole is of a right-angled structure, the left end of the bulge structure movable hole is communicated with the blind hole, the horizontal section of the bulge structure movable hole is used for placing the connecting unit, and the vertical section of the bulge structure movable hole is used for placing the bone penetrating unit. The top surface of the blind hole is flush with the top surface of the expansion structure movable hole.
According to some embodiments of the invention, the retainer portion is a cylindrical structure.
According to some embodiments of the invention, the supporting portion is a curved structure and has a radian, the cross section of the supporting portion is a circle with a diameter gradually changing from large to small from top to bottom, the specific radian can be designed according to the actual requirement angle of the joint of a patient, and meanwhile, the inner side wall of the through hole is provided with internal threads the same as those of the blind hole, so that enough threads in the through hole can be matched with the extrusion screw.
According to some embodiments of the invention, the retention portion and the support portion are integrally formed.
According to some embodiments of the invention, the lower end of the supporting part is provided with a cylindrical structure, the outer wall of the cylindrical structure is provided with external threads, and the external threads are matched with the internal threads of the acetabular cup in the hip replacement operation for fixation, so that the femoral stem and the acetabular cup can be tightly connected, the stability of the hip joint in the movement process is ensured, and the dislocation accident is reduced.
According to some embodiments of the invention, the expanded structure moving holes are evenly distributed on the outer side wall of the retention part along the circumference.
According to some embodiments of the invention, the bone penetrating unit is a triangular prism structure.
According to some embodiments of the present invention, an edge of one side of the bone penetrating unit is an insertion part facing an outer sidewall of the fixing part through a swelling structure movement hole such that the insertion part protrudes through the swelling structure movement hole to penetrate the bone when the guide screw is cooperatively coupled with the set screw, wherein the edge is composed of a lateral edge and 2 sides adjacent to the lateral edge.
According to some embodiments of the invention, the embedding portion has embedding teeth thereon, the embedding teeth including a "V" shape, a "W" shape, or a wave shape, so as to be more firmly inserted into the bone.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic structural diagram of a main structure of an embodiment of the present invention;
FIG. 2 is a schematic structural view of an expanded structure of an embodiment of the present invention;
FIG. 3 is a schematic view of the construction of an extrusion screw according to an embodiment of the present invention;
FIG. 4 is a schematic view of an assembled structure of an embodiment of the present invention prior to implantation;
FIG. 5 is a schematic view of an assembled structure after implantation of an embodiment of the present invention;
a main body structure 100, a retention part 110, a bulge structure movable hole 111, a blind hole 112, a support part 120, a through hole 121, a cylindrical structure 122,
A bulging structure 200, a bone-inserting unit 210, an insertion part 211, a connection unit 220, a positioning surface 221, a guide slope 222,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to, for example, the upper, lower, etc., is indicated based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In the description of the present invention, unless otherwise explicitly defined, terms such as set, mounted, connected and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
A femoral stem according to an embodiment of the present invention will be described below with reference to fig. 1, 2, 3, 4 and 5.
As shown in fig. 1 to 5, a femoral stem according to an embodiment of the present invention includes a body structure 100, a swelling structure 200, and a compression screw 300. The main body structure 100 comprises a fixing part 110 and a supporting part 120 which are sequentially connected, a blind hole 112 is formed in the bottom of the fixing part 110, internal threads are formed in the inner side wall of the blind hole 112, a movable hole 111 of a bulging structure 200 is formed in the outer side wall of the fixing part 110, the movable hole 111 of the bulging structure 200 is communicated with the blind hole 112, a through hole 121 is formed in the side wall of the supporting part 120 along the top surface direction of the supporting part 120, the inner side wall of the through hole 121 is provided with the internal threads which are the same as those of the blind hole 112, and the through hole 121; the bulging structure 200 comprises a bone inserting unit 210 and a connecting unit 220, the connecting unit 220 is inserted into the movable hole 111 of the bulging structure 200, the bone inserting unit 210 is arranged on one side, away from the blind hole 112, of the connecting unit 220, one side, close to the blind hole 112, of the connecting unit 220 is a connecting surface, the connecting surface comprises a positioning surface 221 and a guide inclined surface 222 connected to the bottom side of the positioning surface 221, the guide inclined surface 222 inclines from bottom to top along the direction close to the blind hole 112, positioning threads are arranged on the positioning surface 221, and guide threads are arranged on the guide inclined surface 222; the outer side wall of the extrusion screw 300 is provided with an external thread, the external thread is matched with the internal thread, the positioning thread and the guiding thread, and when the guiding thread is matched and connected with the positioning thread, the bone pricking unit 210 extends out of the movable hole 111 of the expansion structure 200. The femoral stem adopting the combined structural design is matched with the main body structure 100, the bulging structure 200 and the extrusion screw 300 for use, the extrusion screw 300 is screwed into the through hole 121 and the blind hole 112, and when the guide thread is matched and connected with the positioning thread, the bone pricking unit 210 extends out of the movable hole 111 of the bulging structure 200 and pricks into the bone. The mode of extending the lug through expansion can effectively increase the stability during installation and retention, so that the femoral stem with a long and thin structure is not required to be designed, the femoral stem is prevented from being easily broken due to stress concentration, the moment is reduced, the strength of the femoral stem is improved, and the service life of the femoral stem is prolonged.
In some embodiments of the present invention, the movable hole 111 of the bulge structure 200 is a right-angled structure, and the leftmost end of the bulge structure is communicated with the blind hole 112, wherein the horizontal section of the structure is used for placing the connecting unit 220, and the vertical section of the structure is used for placing the bone penetrating unit 210.
In some embodiments of the present invention, the retention portion 110 is a cylindrical structure.
In some embodiments of the present invention, the support portion 120 is a curved structure having a curvature, and the specific curvature can be designed according to the actual required angle of the patient's joint.
In some embodiments of the present invention, the retention portion 110 and the support portion 120 are integrally formed.
In some embodiments of the present invention, the lower end of the supporting portion 120 is provided with a cylindrical structure 122, and the outer wall of the cylindrical structure 122 has an external thread, which is adapted to the internal thread of the acetabular cup in the hip replacement surgery for fixation, so that the femoral stem can be tightly connected to the acetabular cup, the stability of the hip joint during movement is ensured, and the occurrence of dislocation is reduced.
In some embodiments of the present invention, the moving holes 111 of the swelling structure 200 are uniformly distributed on the outer sidewall of the retention part 110 along the circumference.
In some embodiments of the present invention, the bone penetrating unit 210 has a triangular prism structure.
In some embodiments of the present invention, the corner of one side of the bone penetrating unit 210 is an insertion part 211, and the insertion part 211 is directed toward the outer sidewall of the fixing part 110 through the movable hole 111 of the swelling structure 200 such that the insertion part 211 protrudes out of the movable hole 111 of the swelling structure 200 to penetrate into the bone when the guide screw is cooperatively coupled with the set screw, wherein the corner is composed of the side and 2 sides adjacent to the side.
In some embodiments of the present invention, the insertion portion 211 has insertion teeth thereon, which include a "V" shape, a "W" shape, or a wave shape, so as to be more firmly inserted into the bone.
Other constructions and operations of femoral stems according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
Referring now to fig. 1-5, a femoral stem in accordance with an embodiment of the present invention is described in detail in one particular embodiment. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
As shown in fig. 1-5, the femoral stem includes a main body structure 100, a bulging structure 200, and an extrusion screw 300. The main body structure 100 comprises a retention part 110 and a support part 120 which are sequentially connected, wherein the retention part 110 is of a cylindrical structure, the bottom of the retention part is provided with a blind hole 112, the inner side wall of the blind hole 112 is provided with internal threads, the outer side wall of the cylinder is provided with 4 right-angled-type structural bulge-out structure 200 movable holes 111 along the circumferential direction, the left end blind hole 112 of the bulge-out structure 200 movable hole 111 is communicated, the support part 120 is of an overall bent structure and has a radian, the radian is designed according to the actual demand angle of a joint of a patient, the side wall of the support part 120 is provided with a through hole 121 which is communicated with the blind hole 112 and has the same diameter along the top surface direction of the support part 120, and the inner; the bulging structure 200 comprises a bone inserting unit 210 and a connecting unit 220, the connecting unit 220 is inserted into a movable hole 111 of the bulging structure 200 of an Right-angled-type structure, wherein a connecting surface in the connecting unit 220 is close to the blind hole 112, the connecting surface comprises a positioning surface 221 and a guiding inclined surface 222 connected to the bottom side of the positioning surface 221, the guiding inclined surface 222 inclines from bottom to top along the direction close to the blind hole 112, positioning threads are arranged on the positioning surface 221, guiding threads are arranged on the guiding inclined surface 222, the bone inserting unit 210 is of a triangular prism structure and is arranged on one side, far away from the blind hole 112, of the connecting unit 220; the top surface of extrusion screw 300 is equipped with hexagon recess 310, and extrusion screw 300's lateral wall is equipped with the external screw thread, external screw thread and internal thread, location screw thread and guide thread homogeneous phase adaptation, when guide thread and location screw thread are connected in coordination each other, unit 210 is pricked to the bone stretches out and swells structure 200 activity hole 111, wherein the edges and corners (the edges and corners comprises the arris and 2 sides adjacent with this arris) of one side in the triangular prism structure are embedding portion 211, embedding portion 211 is through the lateral wall of swelling structure 200 activity hole 111 towards the maintenance part 110 of cylinder structure, make and work as guide thread with when location screw thread is connected in coordination, embedding portion 211 stretches out gradually bulge structure 200 activity hole 111 slowly pricks into the bone.
Specifically, when the femoral stem is applied to hip replacement surgery, the main body structure 100, 4 bulging structures 200, and 1 extrusion screw 300 are prepared before the surgery of the patient. During operation, the hip joint of a patient is opened, after the femoral head is cut off, a femoral cavity of the patient is reamed by using a bone-filing drill, 4 bulging structures 200 are taken, the connecting units 220 are respectively aligned to the horizontal sections of the movable holes 111 of the bulging structures 200, one side of the connecting surface is abutted against the blind hole 112, the positioning surface 221 is arranged at the upper end, the guide inclined surface 222 is arranged at the lower end, then the bones of the triangular prism structure are pricked into the unit 210 and placed into the vertical section of the movable holes 111 of the bulging structures 200, the sharp corner side (namely the embedding part 211) faces to the outer side wall of the fixing part 110 of the cylindrical structure through the movable holes 111 of the bulging structures 200 but does not exceed the outer side wall of the fixing part 110 of the cylindrical structure, after the four bulging structures 200 are installed, the fixing part 110 of the main body structure 100 is placed in the femoral cavity, simultaneously, after the angle of the supporting part 120 is adjusted, the extrusion screw, the extrusion screw 300 is slowly rotated. When the guide screw thread and the positioning screw thread are mutually matched and connected, the embedding part 211 is slowly extruded out and penetrates through the movable hole 111 of the swelling structure 200, exceeds the outer side wall of the solid structure, slowly penetrates into the bone, and can be selectively penetrated into the depth of the bone as required to finish the fixation.
In the description herein, references to the description of "some embodiments" or "examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A femoral stem, comprising:
the main body structure comprises a fixing part and a supporting part which are sequentially connected, wherein a blind hole is formed in the bottom of the fixing part, internal threads are formed in the inner side wall of the blind hole, a swelling structure moving hole is formed in the outer side wall of the fixing part, the swelling structure moving hole is communicated with the blind hole, a through hole is formed in the side wall of the supporting part along the top surface direction of the supporting part, and the through hole is communicated with the blind hole and has the same diameter;
the expansion structure comprises a bone pricking unit and a connecting unit, the connecting unit is inserted into a movable hole of the expansion structure, the bone pricking unit is arranged on one side, far away from the blind hole, of the connecting unit, one side, close to the blind hole, of the connecting unit is a connecting surface, the connecting surface comprises a positioning surface and a guide inclined surface connected to the bottom side of the positioning surface, the guide inclined surface inclines from bottom to top along the direction close to the blind hole, positioning threads are arranged on the positioning surface, and guide threads are arranged on the guide inclined surface;
the extrusion screw, the top surface of extrusion screw is equipped with the hexagon recess, extrusion screw's lateral wall is equipped with the external screw thread, the external screw thread with the internal thread location screw thread guide thread looks adaptation, the guide thread with when location screw thread is mutually supported and is connected, the unit stretches out is pricked to the skeleton the structure activity hole of bulging.
2. The femoral stem according to claim 1, wherein the inner side wall of the through hole has the same internal thread as the blind hole.
3. The femoral stem according to claim 1, wherein the bulge structure movable hole is a right-angled-Z structure, and the left end of the bulge structure movable hole is communicated with the blind hole.
4. The femoral stem of claim 1, wherein the retainer portion is a cylindrical structure.
5. The femoral stem according to claim 1, wherein the supporting portion is a curved structure having an arc, and a lower end of the supporting portion is provided with a cylindrical structure having an outer thread on an outer wall thereof.
6. The femoral stem of claim 1, wherein the retention portion and the support portion are integrally formed.
7. The femoral stem according to claim 1, wherein the bulge-structure moving holes are evenly distributed on the outer side wall of the retention part along the circumference.
8. The femoral stem according to claim 1, wherein the bone penetrating unit has a triangular prism structure.
9. The femoral stem according to claim 8, wherein the corner of one side of the bone penetrating unit is an insertion part facing the outer sidewall of the retention part through a swelling structure moving hole.
10. The femoral stem according to claim 1, wherein the embedding portion has embedding teeth thereon, the embedding teeth comprising a line shape, a V shape, a W shape or a wave shape.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187636.0A CN110934668A (en) | 2019-11-28 | 2019-11-28 | Femoral stem |
| PCT/CN2020/091772 WO2021103442A1 (en) | 2019-11-28 | 2020-05-22 | Femoral stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911187636.0A CN110934668A (en) | 2019-11-28 | 2019-11-28 | Femoral stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110934668A true CN110934668A (en) | 2020-03-31 |
Family
ID=69908178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911187636.0A Pending CN110934668A (en) | 2019-11-28 | 2019-11-28 | Femoral stem |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN110934668A (en) |
| WO (1) | WO2021103442A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103442A1 (en) * | 2019-11-28 | 2021-06-03 | 佛山市逸合生物科技有限公司 | Femoral stem |
| CN113317911A (en) * | 2021-06-04 | 2021-08-31 | 张丽君 | Pressure expansion type femoral stem |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6355069B1 (en) * | 1998-08-20 | 2002-03-12 | Depuys Orthopaedics, Inc. | Bone engaging prosthesis |
| CA2552727A1 (en) * | 2004-01-16 | 2005-08-04 | Expanding Orthopedics, Inc. | Bone fracture treatment devices |
| WO2007124607A1 (en) * | 2006-04-28 | 2007-11-08 | Laszlo Prezmecky | Shaft for a joint prosthesis |
| CA2768520A1 (en) * | 2008-07-23 | 2010-01-28 | University Of Louisville Research Foundation, Inc. | Device and method to prevent hip fractures |
| WO2011005188A1 (en) * | 2009-07-10 | 2011-01-13 | Milux Holding S.A. | Hip joint device |
| CN103445885B (en) * | 2013-07-02 | 2015-05-13 | 刘顺民 | Femoral handle fixed through expansion |
| CN110934668A (en) * | 2019-11-28 | 2020-03-31 | 佛山市逸合生物科技有限公司 | Femoral stem |
-
2019
- 2019-11-28 CN CN201911187636.0A patent/CN110934668A/en active Pending
-
2020
- 2020-05-22 WO PCT/CN2020/091772 patent/WO2021103442A1/en active Application Filing
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021103442A1 (en) * | 2019-11-28 | 2021-06-03 | 佛山市逸合生物科技有限公司 | Femoral stem |
| CN113317911A (en) * | 2021-06-04 | 2021-08-31 | 张丽君 | Pressure expansion type femoral stem |
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| Publication number | Publication date |
|---|---|
| WO2021103442A1 (en) | 2021-06-03 |
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