CN212466269U - Surface shoulder joint prosthesis - Google Patents
Surface shoulder joint prosthesis Download PDFInfo
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- CN212466269U CN212466269U CN202020282210.5U CN202020282210U CN212466269U CN 212466269 U CN212466269 U CN 212466269U CN 202020282210 U CN202020282210 U CN 202020282210U CN 212466269 U CN212466269 U CN 212466269U
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Abstract
The utility model belongs to the field of medical equipment, a surface shoulder joint prosthesis is disclosed, include the humerus head prosthesis with human humerus head shape adaptation, form at the connecting rod of humerus head prosthesis internal surface and can dismantle the broach of being connected with the connecting rod, wherein, be formed with the external screw thread section on the connecting rod, be formed with on the broach with external screw thread section complex internal thread section and with the first hollow section that the end of internal thread section is linked together, the external screw thread section of connecting rod is rotatory to getting into first hollow section through the internal thread section to be held and fix in first hollow section. The surface shoulder joint prosthesis of the utility model can be firmly fixed with the humerus bone of the human body, has good stability and wide applicability.
Description
Technical Field
The utility model belongs to the technical field of medical instrument, concretely relates to surface shoulder joint false body.
Background
The conventional artificial shoulder joint replacement includes two major types, i.e., humeral head replacement and artificial total shoulder joint replacement, in which the whole humeral head is removed and a prosthesis is installed, while the surface shoulder joint replacement only grinds off a part of the humeral head and a surface shoulder joint prosthesis adapted to the shape of the humeral head is fitted over the remaining part of the humeral head.
When the humerus head prosthesis is used, firstly, bone on the outer layer of the humerus head is removed, a hole for installing the broach is formed on the humerus head, the broach of the surface shoulder joint prosthesis is aligned with the hole on the humerus head, and external force is applied to the prosthesis to enable the inner surface of the humerus head prosthesis to be in contact with the outer surface of the humerus head of a human body in a fitting manner, so that installation is completed. In order to ensure the fixing effect, bone cement can be arranged in the hole on the humerus head, so that the humerus head can be conveniently fixed with human humerus bone.
Although the existing surface shoulder joint prosthesis can meet the requirements of patients, in practical use, the broach and the humerus of a human body are in taper press fit, the prosthesis has the risk of taper press fit failure when being implanted into the human body and used for a long time, and once the taper press fit failure, the prosthesis can be free in the human body and the nerve cutting situation can occur. Meanwhile, the humerus head prosthesis and the broach are integrally formed, so that the humerus head prosthesis or the broach is easy to have the phenomenon that the size of the humerus head prosthesis or the broach is not suitable for the same patient.
In view of the defects of the prior art surface shoulder joint prosthesis, those skilled in the art would like to provide a surface shoulder joint prosthesis which is firmly fixed to the humeral head bone of the human body, has good stability and is widely applicable.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a surface shoulder joint prosthesis which is firmly fixed with the humerus head bone of a human body, has good stability and wide applicability.
According to the utility model discloses a surface shoulder joint prosthesis include with the humerus head prosthesis of human humerus head shape adaptation, form at the connecting rod of humerus head prosthesis internal surface and can dismantle the broach of being connected with the connecting rod, wherein, be formed with the external screw thread section on the connecting rod, be formed with on the broach with external screw thread section complex internal thread section and with the first hollow section that the end of internal thread section is linked together, the external screw thread section of connecting rod is rotatory to getting into first hollow section through the internal thread section to be held and fix in first hollow section.
Furthermore, a second hollow section communicated with the head end of the internal thread section is formed on the intramedullary nail, and a cone matching section positioned between the external thread section and the inner surface of the humeral head prosthesis is formed on the connecting rod, wherein after the external thread section of the connecting rod passes through the internal thread section through the second hollow section and enters the first hollow section, the cone matching section is pressed in the second hollow section.
Further, the outer circumferential wall of the conical section and/or the inner circumferential wall of the second hollow section are/is configured as a rough surface.
Further, an external threaded section is formed at the free end of the connecting rod, and the axial length of the external threaded section is less than or equal to the axial length of the first hollow section.
Further, the tapered section has an outer diameter dimension that gradually decreases from a first end proximate the inner surface of the humeral head prosthesis toward a second end distal from the inner surface of the humeral head prosthesis.
Furthermore, a transition section positioned between the external thread section and the conical section is formed on the connecting rod, the outer diameter of the transition section is smaller than that of the external thread section, and the outer diameter of the transition section is smaller than that of the second end.
Furthermore, a plurality of longitudinal ribs distributed circumferentially are formed on the outer surface of the broach.
Furthermore, the upper part of the outer surface of the broach is formed with an HA + TI coating, and the middle-lower part of the outer surface of the broach is formed with a porous three-dimensional structure layer.
Further, the inner surface of the humeral head prosthesis is formed with an HA + TI coating.
Further, the inner surface of the humeral head prosthesis is formed with a plurality of anti-rotation protrusions.
Preferably, the plurality of rotation prevention protrusions are arranged in a cone shape and uniformly distributed, and the axes of the rotation prevention protrusions form an included angle with the diameter direction of the humeral head prosthesis.
Compared with the prior art, the surface shoulder joint prosthesis of the utility model has the following advantages:
1) the humerus head prosthesis and the medullary needle of the surface shoulder joint prosthesis of the utility model can be detachably arranged, so that the specifications of the humerus head prosthesis and the medullary needle which are most suitable for patients can be selected according to the sizes of the humerus heads of different patients, and the utility model has wide applicability. Simultaneously the utility model discloses a fixed connection of humerus head false body and broach is realized in the cooperation that surface shoulder joint false body passes internal thread section and first hollow section through the external screw thread section, surface shoulder joint false body is after the installation is accomplished promptly, external screw thread section does not keep screw-thread fit with the internal thread section, but lies in first hollow section, such setting can prevent surface shoulder joint false body at the motion in-process, the external screw thread section is because of keeping the emergence of the not hard up condition of cooperation emergence of screw-thread fit because of keeping screw-thread fit with the internal thread section to effectively avoid the pine of humerus head false body and broach to take off, with make the utility model discloses a surface shoulder joint false body has better fixed effect.
2) Through be formed with the second hollow section that is linked together with the head end of internal thread section on the broach, be formed with the awl that is located between external screw thread section and the humerus head prosthesis internal surface on the connecting rod and join in marriage the section and make the humerus head prosthesis and broach still have the awl except that external screw thread section and the fixed mode of cooperation of first hollow section match the fixed mode of pressing of section and second hollow section and join in marriage fixed mode, further avoided taking off between humerus head prosthesis and the broach, thereby make the utility model discloses a surface shoulder joint prosthesis has better fixed effect.
3) The HA + TI coating is formed on the upper part of the outer surface of the broach, and the porous three-dimensional structure layer is formed on the middle lower part of the outer surface of the broach, so that the outer surface of the broach is in a rough structure, and human bone is easy to be fused into and grow on the outer surface of the broach.
4) The inner surface of the humerus head prosthesis is provided with a plurality of conical and evenly distributed anti-rotation protrusions, and the anti-rotation protrusions are configured to form an included angle between the axis of the anti-rotation protrusions and the diameter direction of the humerus head prosthesis, so that after the humerus head prosthesis is connected with the humerus head of a human body, the anti-rotation protrusions can be inserted into the surface of the humerus head of the human body to prevent the humerus head prosthesis from rotating relative to the humerus head of the human body.
Drawings
Fig. 1 is a cross-sectional view of a surface shoulder joint prosthesis according to the present invention;
FIG. 2 is a schematic structural view of a first embodiment of the humeral head prosthesis shown in FIG. 1;
FIG. 3 is a cross-sectional view of the humeral head prosthesis shown in FIG. 2;
FIG. 4 is a schematic structural view of a first embodiment of the intramedullary needle shown in FIG. 1;
fig. 5 is a schematic structural view of a second embodiment of the intramedullary pin according to the present invention;
fig. 6 is a schematic structural view of a second embodiment of a humeral head prosthesis according to the present invention.
Detailed Description
For better understanding of the objects, structure and function of the present invention, the surface shoulder joint prosthesis of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 shows a structure of a surface shoulder joint prosthesis 100 according to the present invention, which includes a humerus head prosthesis 1 fitted to a shape of a humerus head of a human body, a connection rod 11 formed on an inner surface of the humerus head prosthesis 1, and a broach 2 detachably connected to the connection rod 11, wherein an external thread section 111 is formed on the connection rod 11, an internal thread section 23 fitted to the external thread section 111 and a first hollow section 21 communicated with a distal end of the internal thread section 23 are formed on the broach 2, and the external thread section 111 of the connection rod 11 is rotated through the internal thread section 23 to enter the first hollow section 21 and is accommodated and fixed in the first hollow section 21.
The utility model discloses a surface shoulder joint prosthesis 100 is when using, gets rid of the sclerotin on human humerus head's surface in advance to open a hole that is used for inserting broach 2 on human humerus head's surface, at the installation the utility model discloses in the surface shoulder joint prosthesis 100 of embodiment one, at first according to the humerus head prosthesis 1 and the broach 2 of corresponding specification of patient's humerus head size selection, aim at broach 2 with connecting rod 11, with connecting rod 11 external screw thread section 11 through in the first hollow section 21 of internal screw thread section 23 screw in of broach 2, and fixed in first hollow section 21, thereby make humerus head prosthesis 1 link together with broach 2. Then, the broach 2 is aligned with a hole which is opened on the surface of the humerus head of the human body in advance, external force is applied to the humerus head prosthesis 1, the broach 2 gradually penetrates into the hole until the inner side surface of the humerus head prosthesis 1 is attached to the surface of the humerus head of the human body, and at the moment, the surface shoulder joint prosthesis 100 is well fixed with the humerus head of the human body.
It should be noted that, the existing surface shoulder joint prosthesis is generally formed integrally, that is, the broach and the humeral head prosthesis are not detachable, although the surface shoulder joint prosthesis has different specifications, the sizes of the humeral head prosthesis and the broach of the surface shoulder joint prosthesis of any specification are fixed and invariable, in practical application, only one of the humeral head prosthesis and the broach of the surface shoulder joint prosthesis of the same specification can be adapted to a patient, so that after the surface shoulder joint prosthesis is normally installed, the surface shoulder joint prosthesis is easy to loose, and the later recovery and the service life of the surface shoulder joint prosthesis are affected. The humerus head prosthesis 1 and the medullary needle 2 are detachably arranged, so that the specifications of the humerus head prosthesis 1 and the medullary needle 2 which are most suitable for patients can be selected according to the sizes of the humerus heads of different patients, and the humerus head prosthesis has wide applicability. Simultaneously the utility model discloses a fixed connection of humerus head false body 1 and broach 2 is realized in the cooperation that surface shoulder joint false body 100 passed internal thread section 23 and first hollow section 21 through external screw thread section 111, surface shoulder joint false body 1 is after the installation is accomplished promptly, external screw thread section 111 does not keep screw-thread fit with internal thread section 23, but lies in first hollow section 21, such setting can prevent surface shoulder joint false body 100 in the motion process, external screw thread section 111 takes place the emergence of the not hard up condition of cooperation because of keeping screw-thread fit with internal thread section 23 to effectively avoided loosening and taking off of humerus head false body 1 and broach 2, with make the utility model discloses a surface shoulder joint false body 100 has better fixed effect.
According to the surface shoulder joint prosthesis 100 of the present invention, the intramedullary nail 2 may further be formed with a second hollow section 22 communicating with the head end of the internal thread section 23, and the connecting rod 11 may further be formed with a conical section 112 located between the external thread section 111 and the inner surface of the humeral head prosthesis 1, wherein the external thread section 111 of the connecting rod 11 passes through the internal thread section 23 through the second hollow section 22 to enter the first hollow section 21, and the conical section 112 may be press-fitted into the second hollow section 22. In this case, the process of connecting the humeral head prosthesis 1 with the intramedullary nail 2 will be: the connecting rod 11 of the humeral head prosthesis 1 is aligned with the intramedullary nail 2, and the external threaded section 111 of the connecting rod 11 sequentially enters the second hollow section 22, the internal threaded section 23, and the first hollow section 21 and is fixed in the first hollow section 21, and in this process, the taper fitting section 112 gradually enters the second hollow section 22 and is press-fitted in the second hollow section 22. Make humerus head prosthesis 1 and broach 2 still have the pressure of awl joining in marriage section and the fixed mode of pressing of second hollow section 22 except the fixed mode of external screw thread section 111 and the cooperation of first hollow section 21 through this setting, further avoided taking off between humerus head prosthesis 1 and the broach 2, thereby make the utility model discloses a surface shoulder joint prosthesis 100 has better fixed effect.
According to the present invention, the outer circumferential wall of the tapered section 112 and/or the inner circumferential wall of the second hollow section 22 may be configured as a rough surface. Due to the fact that the conical section 112 is in press fit with the second hollow section 22, the conical section 112 is not prone to falling out of the second hollow section 22 after the conical section 112 is in press fit with the second hollow section 22. In another embodiment, the outer peripheral wall of the tapered section 112 and/or the inner peripheral wall of the second hollow section 22 may also be smooth, so that a more accurate fit can be achieved.
In the embodiment shown in fig. 2, the male screw section 111 may be formed at the free end of the connecting rod 11, and the axial length of the male screw section 111 may be equal to or less than the axial length of the first hollow section 21. It should be noted that in the present embodiment, the external thread section 111 is matched with the first hollow section 21 and the external thread section 111 is fixed in the first hollow section 21, so that the axial length of the external thread 111 is less than or equal to the axial length of the first hollow section 21, which ensures that the external thread section 111 can be screwed into the first hollow section 21 and that the matching between the first hollow section 21 and the external thread section 111 meets the requirement of stable connection between the humeral head prosthesis 1 and the intramedullary nail 2.
Referring to fig. 2 and 3, the tapered section 112 can have an outer diameter dimension that gradually decreases from a first end F near the inner surface C of the humeral head prosthesis 1 toward a second end G distal from the inner surface C of the humeral head prosthesis 1. Make awl join in marriage section 112 and its contact surface when progressively compressing with second hollow section 22 through this setting and increase gradually, increase the stability of structure, the compressive stress that produces when the patient normally moves the shoulder joint in the future can make the prosthesis tighter and tighter simultaneously, guarantees the stability of surperficial shoulder joint prosthesis.
As shown in fig. 1 and 2, the connecting rod 11 may further have a transition section 113 formed thereon between the external threaded section 111 and the tapered section 112, the outer diameter of the transition section 113 may be smaller than the outer diameter of the external threaded section 111, and the outer diameter of the transition section 113 may be smaller than the outer diameter of the second end G. Since the external thread section 111 and the first hollow section 21 and the taper fitting section 112 and the second hollow section 22 are fitted together as the coupling between the humeral head prosthesis 1 and the intramedullary nail 2 in the present embodiment, the above arrangement enables the transition section 113 to stably couple the external thread section 111 and the taper fitting section 112 while the transition section 113 is not caught by the second hollow section 22 and the internal thread section 23 when the external thread section 111 is screwed into the first hollow section 21 of the intramedullary nail 2.
In one embodiment of the intramedullary nail 2, as shown in fig. 4, the outer surface of the intramedullary nail 2 may be further formed with a plurality of longitudinal ribs 24 distributed circumferentially. By this arrangement, rotation of the broach 2 after insertion into the humeral head of the human body is avoided, preventing dislocation of the superficial shoulder joint prosthesis 100.
As shown in fig. 4, the upper part a of the outer surface of the broach 2 may be formed with an HA + TI coating (hydroxyapatite and pure titanium mixed coating) 25, and the lower middle part B of the outer surface of the broach 2 may be formed with a porous three-dimensional structure layer 26. The utility model discloses a HA + TI coating and porous spatial structure layer 26 of broach 2 all form on the surface of the solid structure of broach 2, wherein the upper portion of broach 2 is formed with second hollow section 22, internal thread section 23 and first hollow section 21, therefore the upper portion of the surface of broach 2 HAs the pore structure of compriseing second hollow section 22, internal thread section 23 and first hollow section 21, be not the totally enclosed solid structure, and the well lower part of broach 2 is the totally enclosed solid structure, connecting rod 11 is connected through the totally enclosed solid structure of non-with broach 2 exactly, consequently this structure is the position of atress again, require it existing higher intensity. In the prior art, a method of spraying a TI coating (pure titanium coating) on the surface of a prosthesis is often adopted to improve the performance of bone fusion, however, TI is an inert metal, lacks bone induction capability, cannot form chemical bonding with bone when contacting with the physiological environment of a human body, and cannot promote the growth of new bone. In the embodiment, the HA (hydroxyapatite) + TI coating 25 is formed on the upper part of the outer surface of the broach 2, so that the upper part of the outer surface of the broach 2 HAs a rough outer surface, human bone can be attached to the HA + TI coating 25 to grow, and in addition, the HA is a main inorganic composition of the human bone and HAs excellent bioactivity and bone conduction capability. Therefore, the HA + TI coating HAs good biocompatibility and bioactivity on one hand and higher bonding strength on the other hand. The porous three-dimensional structure layer 26 is similar to the porous structure of human bone, and may be, for example, a 3D printed trabecular bone structure, which facilitates growth of human bone. It should be noted that, since the porous three-dimensional structure layer is a porous structure and has low strength, the porous three-dimensional structure layer is arranged at the middle-lower part B of the outer surface of the intramedullary nail 2, i.e. the closed solid structure part, so as to ensure that the intramedullary nail 2 has high strength.
In the embodiment shown in fig. 2, the inner surface C of the humeral head prosthesis 1 can also be formed with an HA + TI coating. Since the inner surface C of the humeral head prosthesis 1 is in contact with the humeral head of the human body, the inner surface C of the humeral head prosthesis 1 is formed into a rough structure by this arrangement, which facilitates bone growth of the human body.
As shown in fig. 2, the inner surface C of the humeral head prosthesis 1 can also be formed with a plurality of anti-rotation protrusions 12. After the humerus head prosthesis 1 is connected with the humerus head of the human body through the arrangement, the anti-rotation protrusion 12 can be inserted into the surface of the humerus head of the human body to prevent the humerus head prosthesis 1 from rotating relative to the humerus head of the human body.
In the embodiment shown in fig. 3, a plurality of rotation prevention protrusions 12 may be provided in a tapered shape and uniformly distributed, and the axis D of the rotation prevention protrusions 12 may form an angle α with the diameter E direction of the humeral head prosthesis 1. By the arrangement, an included angle alpha is formed between the axis D of the anti-rotation protrusion 12 and the diameter direction E of the humeral head prosthesis 1, so that the acting force direction of the anti-rotation protrusion on the humeral head of a human body (in the axis direction of the anti-rotation protrusion 12) and the acting force direction when the anti-rotation protrusion rotates (in the direction perpendicular to the diameter E) are not collinear, and the anti-rotation protrusion 12 is not easy to rotate after being inserted into the humeral head of the human body.
It should be noted that, in the surface shoulder joint prosthesis 100 according to the embodiment of the present invention, since the middle-lower portion B of the outer surface of the broach 2 HAs the porous three-dimensional mechanism layer 26, and the upper portion a of the outer surface of the broach 2 and the inner surface C of the humeral head prosthesis 1 have HA + TI coatings, it is ensured that the human bone and the surface shoulder joint prosthesis 100 are fused and grow well, and therefore, the fixation with bone cement is not required, and the bone cement can be prevented from falling off or falling off together with the human bone when the shoulder joint moves in the future. However, since the cost of the broach according to the first embodiment is high in the prior art, the broach 2 according to the first embodiment is still relatively common in the case of using cement, and in this regard, the structure of the broach 2 according to the first embodiment shown in fig. 5 is also shown, and the broach 2 according to the present embodiment is different from the broach 2 according to the first embodiment shown in fig. 4 only in that the HA + TI coating 25 and the porous solid structure 26 are not provided on the outer surface.
Furthermore, it is still to be noted that for different patients with symptoms of humeral head, different treatments are required for different patients with human humeral head, thereby allowing the surface bone removed human humeral head to have different shapes. For example, in order to adapt to patients with tuberosity hyperosteogeny, sclerosis and rotator cuff injury, the coated humeral head prosthesis 1 of the embodiment shown in fig. 6 is required to increase the contactable range of the articular surface, and the coated humeral head prosthesis shown in fig. 6 is different from the humeral head prosthesis shown in fig. 2 only in the shape of the inner surface. It should be noted that the shape of the inner surface of the humeral head prosthesis 1 can be modified accordingly for different symptoms of the humeral head of the patient, and will not be described in detail herein.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the scope of the embodiments of the present invention, and are intended to be covered by the claims and the specification. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present invention is not limited to the particular embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.
Claims (10)
1. A surface shoulder joint prosthesis is characterized by comprising a humerus head prosthesis matched with the shape of a humerus head of a human body, a connecting rod formed on the inner surface of the humerus head prosthesis, and a broach detachably connected with the connecting rod, wherein an external thread section is formed on the connecting rod, an internal thread section matched with the external thread section and a first hollow section communicated with the tail end of the internal thread section are formed on the broach, and the external thread section of the connecting rod rotates to enter the first hollow section through the internal thread section and is contained and fixed in the first hollow section.
2. The superficial shoulder joint prosthesis of claim 1, wherein the broach further has a second hollow section formed thereon communicating with a head end of the internal thread section, and the connecting rod further has a tapered section formed thereon between the external thread section and the inner surface of the humeral head prosthesis, wherein the tapered section is press-fitted into the second hollow section after the external thread section of the connecting rod passes through the internal thread section via the second hollow section into the first hollow section.
3. The surface shoulder joint prosthesis of claim 2, wherein the outer peripheral wall of the tapered section and/or the inner peripheral wall of the second hollow section is configured as a roughened surface.
4. The surface shoulder joint prosthesis of claim 2, wherein the externally threaded section is formed at a free end of the connecting rod, the externally threaded section having an axial length that is less than or equal to an axial length of the first hollow section.
5. The facial shoulder joint prosthesis of any one of claims 2-4, wherein the tapered section has an outer diameter dimension that gradually decreases from a first end proximal to the inner surface of the humeral head prosthesis toward a second end distal to the inner surface of the humeral head prosthesis.
6. The surface shoulder joint prosthesis of claim 5, wherein the connecting rod further defines a transition section therebetween, the transition section having an outer diameter dimension less than an outer diameter dimension of the outer threaded section and an outer diameter dimension less than an outer diameter dimension of the second end.
7. The surface shoulder joint prosthesis of any one of claims 1-4, wherein the outer surface of the broach is further formed with a plurality of circumferential longitudinal ribs.
8. The surface shoulder joint prosthesis of any one of claims 1-4, wherein an upper portion of the outer surface of the broach is formed with an HA + TI coating, and a middle-lower portion of the outer surface of the broach is formed with a porous three-dimensional structural layer.
9. The superficial shoulder joint prosthesis of any of claims 1-4, wherein the inner surface of the humeral head prosthesis is formed with an HA + TI coating.
10. The facial shoulder joint prosthesis of claim 9, wherein the inner surface of the humeral head prosthesis is further formed with a plurality of anti-rotation protrusions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020282210.5U CN212466269U (en) | 2020-03-09 | 2020-03-09 | Surface shoulder joint prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020282210.5U CN212466269U (en) | 2020-03-09 | 2020-03-09 | Surface shoulder joint prosthesis |
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| CN212466269U true CN212466269U (en) | 2021-02-05 |
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| CN202020282210.5U Active CN212466269U (en) | 2020-03-09 | 2020-03-09 | Surface shoulder joint prosthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111297521A (en) * | 2020-03-09 | 2020-06-19 | 北京市春立正达医疗器械股份有限公司 | Surface shoulder joint prosthesis |
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2020
- 2020-03-09 CN CN202020282210.5U patent/CN212466269U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111297521A (en) * | 2020-03-09 | 2020-06-19 | 北京市春立正达医疗器械股份有限公司 | Surface shoulder joint prosthesis |
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Inventor after: Fu Zhongguo Inventor after: Zeng Songlu Inventor after: Xie Fengbao Inventor after: Shi Chunbao Inventor after: Zhu Gengbo Inventor after: Guo Jing Inventor before: Xie Fengbao Inventor before: Shi Chunbao Inventor before: Guo Jing Inventor before: Zhu Gengbo Inventor before: Hou Yucong |