Rotatable hemi-shoulder joint prosthesis

Abstract

The application discloses a rotatable half-shoulder joint prosthesis, which comprises a humeral head, a glenoid liner, a limiting piece, an upper bone-cutting segment, a lower bone-cuting segment and a medullary cavity needle, one end of the humeral head is provided with a limiting groove, the glenoid liner is arranged in the limiting groove, one end of the upper bone-cuting segment is connected with the limiting piece through the glenoid liner, the upper bone-cutting segment can move axially and rotate relative to the glenoid liner, the limiting piece is used for limiting the upper bone-cuting segment from being separated from the glenoid liner, the other end of the upper bone-cuting segment is connected with the lower bone-cuting segment, one end of the lower bone-cuting segment, which is far away from the upper bone-cuting segment, is connected with the medullary cavity needle, and the medullary cavity needle is used for being implanted into a humeral medullary cavity. In the application, the upper bone-cuting segment can move axially and rotate relative to the glenoid liner, the length of the half-shoulder joint prosthesis can be adjusted, the postoperative activity of a patient can be effectively coped with, and the humeral head, the upper bone-cuting segment, the lower bone-cuting segment, the medullary cavity needle, bone cement and the humerus are not affected by abnormal rotation or shearing stress.

Description

Technical Field

[0001] The present invention belongs to the technical field of medical devices, and in particular relates to a rotatable semi-shoulder joint prosthesis. Background Art

[0002] The human shoulder joint is the joint with the largest range of motion and is also the most unstable. The proximal humerus is one of the most common sites of malignant primary bone tumors after the lower end of the femur and the upper end of the tibia. In the past two decades, with the gradual improvement of neoadjuvant chemotherapy and the advancement of surgical technology, shoulder replacement has become one of the important methods for the treatment of proximal humeral malignant bone tumors for shoulder joint orthopedic diseases such as shoulder bone tumors, shoulder arthritis, and humeral head necrosis. According to clinical experience, doctors usually use the treatment method of amputating part of the humerus when treating some patients with shoulder joint humeral tumors, osteoarthritis and other special shoulder joint diseases. At present, there are usually two types of artificial joint prostheses used in the above-mentioned surgery. One is a positive semi-shoulder prosthesis consisting of an intramedullary prosthesis part, a humeral shaft prosthesis part and a proximal humeral prosthesis part, such as Figure 1 As shown; the other is a reverse shoulder prosthesis, in which the spherical joint surface of the reverse shoulder prosthesis is placed on the glenoid side of the scapula, and the glenoid cup is placed on the proximal end of the humerus. Figure 2 shown.

[0003] The above-mentioned upright hemi-shoulder prosthesis is based on a bionic design of the human body structure. It can replace diseased bones during surgery and improve symptoms. However, due to reasons such as structure and surgical operation process, this type of replacement cannot better restore the physiological function of the shoulder joint; at the same time, it limits some joint mobility, causes long-term postoperative complications, and increases the incidence of subluxation. The above-mentioned reverse total shoulder prosthesis replacement is a complex and technically difficult operation. Once it fails, the means of rescue are extremely limited. At the same time, more postoperative complications such as prosthesis instability, postoperative infection, humeral and glenoid problems, etc. cannot be ignored; they affect the quality of the operation and the recovery of shoulder joint function. Summary of the Invention

[0004] The purpose of the present invention is to provide a rotatable semi-shoulder joint prosthesis to solve the above-mentioned problems existing in the prior art.

[0005] In order to achieve the above object, the application adopts the following technical scheme: A rotatable half-shoulder joint prosthesis comprises a humeral head, a glenoid liner, a limiting piece, an upper bone-cutting segment, a lower bone-cutting segment and a medullary cavity needle, one end of the humeral head is provided with a limiting groove, the glenoid liner is arranged in the limiting groove, one end of the upper bone-cutting segment is connected with the limiting piece through the glenoid liner, the upper bone-cutting segment can move axially and rotate relative to the glenoid liner, the limiting piece is used for limiting the upper bone-cutting segment from being separated from the glenoid liner, the other end of the upper bone-cutting segment is connected with the lower bone-cutting segment, one end of the lower bone-cutting segment away from the upper bone-cutting segment is connected with the medullary cavity needle, and the medullary cavity needle is used for being implanted into the humeral medullary cavity.

[0006] As an optional implementation form of the above technical scheme, the glenoid liner comprises a support ring, the support ring is arranged in the limiting groove, a lower limiting passage adapted to the upper bone-cutting segment is arranged in the middle part of the support ring, at least two arc-shaped clamping pieces are arranged on the support ring and are spaced apart in the circumferential direction, the at least two arc-shaped clamping pieces are enclosed to form an upper limiting passage adapted to the upper bone-cutting segment, and one end of the upper bone-cutting segment is connected with the limiting piece after passing through the lower limiting passage and the upper limiting passage.

[0007] As an optional implementation form of the above technical scheme, an inclined guide surface is arranged on the outer wall of the arc-shaped clamping piece.

[0008] As an optional implementation form of the above technical scheme, an annular clamping groove is arranged on the inner wall of the limiting groove, and a flange adapted to the annular clamping groove is arranged on the outer wall of the arc-shaped clamping piece.

[0009] As an optional implementation form of the above technical scheme, the flange is provided with an upper guide inclined surface and a retreat prevention flat surface, the upper guide inclined surface is used for guiding the flange to extend into the annular clamping groove, and the retreat prevention flat surface is used for limiting the flange from exiting from the annular clamping groove.

[0010] As an optional implementation form of the above technical scheme, the limiting piece comprises a limiting bolt, a screw rod part of the limiting bolt is threadedly connected with the upper bone-cutting segment, and a head part of the limiting bolt abuts against the arc-shaped clamping piece.

[0011] As an optional implementation form of the above technical scheme, the upper bone-cutting segment comprises an upper segment main body, first inserting columns and first inserting holes are respectively arranged at two ends of the upper segment main body, a first step is formed between the first inserting column and the upper segment main body, the first inserting column is connected with the limiting piece through the glenoid liner, and the first step can be mutually blocked with the humeral head to limit the stroke of the first inserting column relative to the humeral head.

[0012] As an optional implementation form of the above technical scheme, the upper segment main body is provided with a first suture hole and an attachment groove, and the attachment groove is used for providing attachment conditions for tendons or artificial ligaments.

[0013] As an optional implementation form of the above technical solution, the lower segment of the cut bone comprises a lower segment body, the two ends of the lower segment body are respectively provided with a second insertion column and a second insertion hole, the second insertion column is inserted into the first insertion hole and the two are taper matched.

[0014] As an optional implementation form of the above technical solution, one end of the intramedullary pin is provided with a third insertion column, the third insertion column is inserted into the second insertion hole and the two are taper matched.

[0015] As an optional implementation form of the above technical solution, the humeral head is provided with a second suture hole, the second suture hole is used for suspending the humeral head on the acromion or scapula.

[0016] As an optional implementation form of the above technical solution, one end of the intramedullary pin close to the lower segment of the cut bone is provided with a biological coating, and the other end of the intramedullary pin is provided with a spiral groove structure.

[0017] As an optional implementation form of the above technical solution, the humeral head and the glenoid liner are made of ultra-high molecular weight polyethylene material, and the limiting piece, the upper segment of the cut bone, the lower segment of the cut bone and the intramedullary pin are made of titanium alloy material.

[0018] The beneficial effects of the present application are:

[0019] The present application is different from the existing orthosteric hemi-shoulder joint prosthesis and reverse total shoulder joint prosthesis, which is an innovative shoulder joint prosthesis, adopts bionic structure design, can provide good attachment point for tendons and artificial ligaments, effectively restores the function of shoulder joint; in addition, the upper segment of the cut bone can move axially and rotate relative to the glenoid liner, this design can adjust the length of the hemi-shoulder joint prosthesis, effectively cope with the postoperative activity of the patient, protect the humeral head, the upper segment of the cut bone, the lower segment of the cut bone, the intramedullary pin, the bone cement and the humerus from the influence of abnormal rotation or shear stress. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a perspective structure schematic diagram of a rotatable hemi-shoulder joint prosthesis in an embodiment of the present application;

[0021] Figure 2 is a cross-sectional structure schematic diagram of a rotatable hemi-shoulder joint prosthesis in an embodiment of the present application;

[0022] Figure 3 is a perspective structure schematic diagram of a humeral head in an embodiment of the present application;

[0023] Figure 4 is a cross-sectional structure schematic diagram of a humeral head in an embodiment of the present application;

[0024] Figure 5is a schematic diagram of the three-dimensional structure of a glenoid liner in one embodiment of the present invention;

[0025] Figure 6 This is a schematic structural diagram of a position limiting member in one embodiment of the present invention;

[0026] Figure 7 2 is a schematic structural diagram of the upper osteotomy section in one embodiment of the present invention;

[0027] Figure 8 2 is a schematic structural diagram of the lower segment of osteotomy in one embodiment of the present invention;

[0028] Figure 9 It is a schematic structural diagram of a medullary cavity insertion pin in one embodiment of the present invention.

[0029] In the figure: 1- humeral head; 2- glenoid liner; 3- stopper; 4- upper osteotomy section; 5- lower osteotomy section; 6- intramedullary pin;

[0030] 11-limiting groove; 12-annular slot; 13-second suture hole;

[0031] 21-support ring; 22-arc card; 23-flange;

[0032] 31-limiting bolt;

[0033] 41 - upper body; 42 - first plug post; 43 - first plug hole; 44 - first suture hole; 45 - attachment groove;

[0034] 51-lower section body; 52-second plug post; 53-second plug hole;

[0035] 61-third plug-in column; 62-spiral groove structure. DETAILED DESCRIPTION

[0036] like Figures 1-9 As shown, this embodiment provides a rotatable hemi-shoulder joint prosthesis, including a humeral ball head 1, a glenoid sleeve 2, a limiting member 3, an osteotomy upper segment 4, an osteotomy lower segment 5 and a medullary cavity pin 6. One end of the humeral ball head 1 is provided with a limiting groove 11, and the glenoid sleeve 2 is arranged in the limiting groove 11. One end of the osteotomy upper segment 4 passes through the glenoid sleeve 2 and is connected to the limiting member 3. The osteotomy upper segment 4 can move axially and rotationally relative to the glenoid sleeve 2. The limiting member 3 is used to limit the osteotomy upper segment 4 from being separated from the glenoid sleeve 2. The other end of the osteotomy upper segment 4 is connected to the osteotomy lower segment 5. The end of the osteotomy lower segment 5 away from the osteotomy upper segment 4 is connected to the medullary cavity pin 6, and the medullary cavity pin 6 is used to be implanted into the humeral medullary cavity.

[0037] like Figure 1 and Figure 2As shown, the humeral head 1, the upper bone cutting section 4, the lower bone cutting section 5 and the intramedullary pin 6 are sequentially arranged, the glenoid liner 2 is arranged inside the humeral head 1, one end of the upper bone cutting section 4 passes through the glenoid liner 2 and is connected with the limiting piece 3, the spherical structure of the humeral head 1 avoids the need to direct it to the glenoid cavity, can simplify the prosthesis structure, reduce the difficulty of surgery and improve the quality of surgery.

[0038] The application is different from the existing orthosteric hemi-shoulder joint prosthesis and the reverse full-shoulder joint prosthesis, is an innovative shoulder joint prosthesis, adopts a bionic structure design, can provide good attachment points for tendons and artificial ligaments, effectively restores the function of the shoulder joint, in addition, the upper bone cutting section 4 can move axially and rotate relative to the glenoid liner 2, this design can adjust the length of the hemi-shoulder joint prosthesis, effectively deals with the postoperative activity of the patient, protects the humeral head 1, the upper bone cutting section 4, the lower bone cutting section 5, the intramedullary pin 6, the bone cement and the humerus from being affected by abnormal rotation or shear stress.

[0039] As shown in the drawings, Figure 5 Specifically, the glenoid liner 2 comprises a supporting ring 21, the supporting ring 21 is arranged in the limiting groove 11, the middle part of the supporting ring 21 is provided with a lower limiting passage matched with the upper bone cutting section 4, at least two arc-shaped clamping pieces 22 are arranged on the supporting ring 21 and spaced apart in the circumferential direction, the at least two arc-shaped clamping pieces 22 are enclosed to form an upper limiting passage matched with the upper bone cutting section 4, one end of the upper bone cutting section 4 passes through the lower limiting passage and the upper limiting passage and is connected with the limiting piece 3. Preferably, the outer wall of the arc-shaped clamping piece 22 is provided with an inclined guide surface, which facilitates the installation of the glenoid liner 2 into the limiting groove 11. In the embodiment, four arc-shaped clamping pieces 22 are arranged, the four arc-shaped clamping pieces 22 are annularly and uniformly arranged, when the glenoid liner 2 is inserted into the limiting groove 11, the arc-shaped clamping pieces 22 can be slightly deformed, so that the glenoid liner 2 is fixed in the limiting groove 11. The limiting piece 3 is located in the limiting groove 11, the upper bone cutting section 4 is connected with the limiting piece 3, when the upper bone cutting section 4 slides downward relative to the glenoid liner 2, the limiting piece 3 can block the end surface of the arc-shaped clamping piece 22, so as to limit the downward stroke of the upper bone cutting section 4; when the upper bone cutting section 4 slides upward relative to the glenoid liner 2, the limiting piece 3 can block the inner wall of the limiting groove 11, so as to limit the upward stroke of the upper bone cutting section 4.

[0040] As shown in the drawings, Figure 3 and Figure 4As shown, in a specific embodiment, the inner wall of the limiting groove 11 is provided with an annular clamping groove 12, and the outer wall of the arc-shaped clamping groove 22 is provided with a flange 23 adapted to the annular clamping groove 12. The flange 23 is provided with an upper guide slope and an anti-retraction plane. The upper guide slope is used to guide the flange 23 to extend into the annular clamping groove 12, and the anti-retraction plane is used to limit the flange 23 from withdrawing from the annular clamping groove 12. The glenoid liner 2 moves upward and is stuck in the limiting groove 11. The upper surface of the flange 23 has an upper guide slope, which can guide the flange 23 to enter the annular clamping groove 12. The lower surface of the flange 23 has an anti-retraction plane, which can prevent the flange 23 from withdrawing from the annular clamping groove 12, thereby improving the stability of the glenoid liner 2.

[0041] like Figure 6 As shown, in a specific embodiment, the limiting member 3 includes a limiting bolt 31, the screw portion of the limiting bolt 31 is threadedly connected to the upper osteotomy section 4, and the head of the limiting bolt 31 abuts against the arc-shaped clip 22. The limiting bolt 31 includes a head and a screw portion that are connected to each other, the outer diameter of the head is larger than the outer diameter of the screw portion, and the screw portion is threadedly connected to the upper osteotomy section 4. When the upper osteotomy section 4 slides downward relative to the glenoid liner 2, the head of the limiting bolt 31 and the end surface of the arc-shaped clip 22 block each other, thereby limiting the downward travel of the upper osteotomy section 4.

[0042] like Figure 7 As shown, specifically, the osteotomy upper segment 4 includes an upper segment body 41, with a first pin 42 and a first socket 43 provided at both ends of the upper segment body 41. A first step is formed between the first pin 42 and the upper segment body 41. The first pin 42 passes through the glenoid liner 2 and is connected to the limiter 3. The first step can block the humeral ball head 1 to limit the travel of the first pin 42 relative to the humeral ball head 1. When the osteotomy upper segment 4 slides upward relative to the glenoid liner 2, the head of the limit bolt 31 blocks the inner wall of the limit slot 11, or the first step of the osteotomy upper segment 4 blocks the humeral ball head 1, thereby limiting the upward travel of the osteotomy upper segment 4. Preferably, the upper segment body 41 is provided with a first suture hole 44 and an attachment groove 45, and the attachment groove 45 is used to provide attachment conditions for tendons or artificial ligaments.

[0043] like Figure 8 As shown, the osteotomy lower section 5 includes a lower section body 51, and the two ends of the lower section body 51 are respectively provided with a second plug 52 and a second plug hole 53, and the second plug 52 is inserted into the first plug hole 43 and the two are tapered. Figure 9 As shown, a third plug post 61 is provided at one end of the intramedullary needle 6. The third plug post 61 is inserted into the second plug hole 53 and the two are tapered to improve the connection stability.

[0044] The humeral ball head 1 is provided with a second suture hole 13, which is used to suspend the humeral ball head 1 on the acromion or scapula. Suturing the humeral ball head 1 to the surrounding tissue through the second suture hole 13 provides strong connectivity and facilitates the growth of muscle tissue around the shoulder joint, preventing the prosthesis from loosening and sinking after surgery.

[0045] The intramedullary needle 6 has a biological coating on its end near the lower osteotomy section 5 to promote bone ingrowth at the osteotomy surface and facilitate later stability. The other end of the intramedullary needle 6 has a spiral groove structure 62 to further secure the bone cement. The intramedullary needle 6 is available in different lengths to accommodate patients with varying osteotomy volumes. The proximal end of the intramedullary needle 6 is sprayed with a biological coating to promote bone ingrowth at the osteotomy surface and facilitate later stability. The distal end of the intramedullary needle 6 has a spiral groove structure 62 to further secure the bone cement.

[0046] The humeral ball head 1 and the glenoid shroud 2 are both made of ultra-high molecular weight polyethylene, and the stopper 3, the upper osteotomy section 4, the lower osteotomy section 5 and the intramedullary pin 6 are all made of titanium alloy.

[0047] In the present invention, the humeral ball head 1 is designed in six specifications, with diameters of 34mm, 36mm, 38mm, 40mm, 42mm and 44mm respectively. The top of the humeral ball head 1 is provided with two second suture holes 13, which allow the entire prosthesis to be suspended on the acromion or scapula, reducing the risk of subluxation without affecting abduction, forward and backward movement. The spherical structure of the humeral ball head 1 avoids the need to point it toward the glenoid cavity, simplifies the prosthesis, reduces the difficulty of the operation and improves the quality of the operation. The bottom of the humeral ball head 1 is provided with a limiting groove 11, the upper half of the limiting groove 11 is a sliding area, and the lower half of the limiting groove 11 is a tapered barb locking area, in which an annular groove 12 is provided.

[0048] The glenoid liner 2 is designed to be 13 mm long. It has a flange 23 on the outside and a sliding hole on the inside. When the glenoid liner 2 is mated with the upper osteotomy segment 4, it allows the upper osteotomy segment 4 to slide axially and rotate within a certain range. Typically, the axial sliding range of the upper osteotomy segment 4 is 1 cm.

[0049] The limiting bolt 31 is designed to a certain specification, and its length is 25 mm. The limiting bolt 31 plays the role of fixing connection and limiting.

[0050] The upper segment of the osteotomy 4 is designed to a specification of 71 mm in length. The upper segment of the osteotomy 4 serves as a connection, and the first suture hole 44 and the attachment groove 45 provide conditions for the attachment of a tendon or an artificial ligament.

[0051] The lower osteotomy segment 5 is designed in three sizes: 47mm, 52mm, and 57mm in length. Tapered connections between the lower osteotomy segment 5 and the upper osteotomy segment 4, as well as between the lower osteotomy segment 5 and the intramedullary pin 6, provide a variety of prosthetic lengths to meet the osteotomy needs of different patients.

[0052] The intramedullary needle 6 is designed in 36 specifications, including proximal diameters of 7mm, 8mm, 9mm and 10mm at the submedullary end; submedullary lengths of 70mm, 90mm and 110mm; and supramedullary lengths of 10mm, 20mm and 30mm. The three main sizes can be combined to form 36 specifications.

[0053] It should be noted that the hemi-shoulder joint prosthesis of the present invention can be made of different materials, and each part of the prosthesis can be customized according to the actual situation of the patient. The above models and materials are only conventional stock types.

[0054] In the present invention, the surfaces of the humeral ball head 1, the upper osteotomy segment 4, the lower osteotomy segment 5 and the medullary cavity pin 6 are all sprayed with a hydroxyapatite coating, which facilitates the growth of shoulder joint tissue cells around the shoulder joint prosthesis, makes the shoulder joint prosthesis have good biocompatibility, allows the shoulder joint prosthesis to be integrated with normal tissue more quickly, produces better biological fixation, and avoids complications such as prosthesis loosening after surgery.

[0055] Compared with the prior art, the present invention has the following advantages:

[0056] 1. New hemi-shoulder prosthesis provides more options for doctors and patients;

[0057] 2. The present invention has the characteristics of multiple specifications and models, so that it can be matched with different sizes and different conditions, and can adapt to the osteotomy needs of different patients;

[0058] 3. The present invention is a semi-shoulder joint prosthesis, which effectively reduces the complications of shoulder arthroplasty. At the same time, if necessary, revision surgery can be performed in subsequent operations without changing the intramedullary prosthesis.

[0059] In the description of the present invention, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, and may be fixedly connected, detachably connected, or integrated; may be mechanically connected or electrically connected; may be directly connected or indirectly connected through an intermediate medium; may be internal connectivity between two elements or an interaction relationship between two elements. Those skilled in the art can understand the specific meanings of the above terms in the present invention. In addition, the specific features, structures, etc. described in the embodiments are included in at least one embodiment. Under the condition that there is no contradiction, those skilled in the art may combine the features of different embodiments. The scope of protection of the present invention is not limited to the above-mentioned specific embodiments. According to the basic technical concept of the present invention, the embodiments that can be associated with by ordinary technicians in this field without creative work all fall within the scope of protection of the present invention.

Claims

1. A rotatable hemi-shoulder joint prosthesis, characterized in that: The invention comprises a humeral ball head (1), a glenoid sleeve (2), a limiting member (3), an upper osteotomy section (4), a lower osteotomy section (5) and a medullary cavity insertion needle (6), wherein one end of the humeral ball head (1) is provided with a limiting groove (11), the glenoid sleeve (2) is arranged in the limiting groove (11), one end of the upper osteotomy section (4) passes through the glenoid sleeve (2) and is connected to the limiting member (3), the upper osteotomy section (4) can move axially and rotationally relative to the glenoid sleeve (2), the limiting member (3) is used to limit the upper osteotomy section (4) from being separated from the glenoid sleeve (2), the other end of the upper osteotomy section (4) is connected to the lower osteotomy section (5), the end of the lower osteotomy section (5) away from the upper osteotomy section (4) is connected to the medullary cavity insertion needle (6), and the medullary cavity insertion needle (6) is used to be implanted into the humeral medullary cavity; The glenoid sleeve (2) includes a support ring (21), the support ring (21) is arranged in the limiting groove (11), the middle part of the support ring (21) is provided with a lower limiting channel adapted to the upper osteotomy section (4), and at least two arc-shaped cards (22) are provided on the support ring (21) at intervals along the circumferential direction. The at least two arc-shaped cards (22) enclose an upper limiting channel adapted to the upper osteotomy section (4), and one end of the upper osteotomy section (4) passes through the lower limiting channel and the upper limiting channel and is connected to the limiting member (3); when the upper osteotomy section (4) slides downward relative to the glenoid sleeve (2), the limiting member (3) can block the end face of the arc-shaped card (22), thereby limiting the downward travel of the upper osteotomy section (4); when the upper osteotomy section (4) slides upward relative to the glenoid sleeve (2), the limiting member (3) can block the inner wall of the limiting groove (11), thereby limiting the upward travel of the upper osteotomy section (4); The inner wall of the limiting groove (11) is provided with an annular clamping groove (12), and the outer wall of the arc-shaped clamping groove (22) is provided with a flange (23) adapted to the annular clamping groove (12); The glenoid liner (2) has a sliding fitting hole inside. After the glenoid liner (2) is fitted with the upper osteotomy section (4), the upper osteotomy section (4) is allowed to slide axially and rotate within a certain range. The axial sliding range of the upper osteotomy section (4) is 1 cm.

2. The rotatable hemi-shoulder joint prosthesis according to claim 1, characterized in that: The outer wall of the arc-shaped card (22) is provided with an inclined guide surface.

3. The rotatable hemi-shoulder joint prosthesis according to claim 1, characterized in that: The flange (23) is provided with an upper guide slope and an anti-retraction plane, the upper guide slope is used to guide the flange (23) to extend into the annular groove (12), and the anti-retraction plane is used to limit the flange (23) from withdrawing from the annular groove (12).

4. The rotatable hemi-shoulder joint prosthesis according to claim 1, wherein: The limiting member (3) comprises a limiting bolt (31), the screw portion of the limiting bolt (31) is threadedly connected to the upper osteotomy section (4), and the head of the limiting bolt (31) abuts against the arc-shaped card (22).

5. The rotatable hemi-shoulder joint prosthesis according to claim 1, characterized in that: The osteotomy upper section (4) comprises an upper section body (41), and a first plug post (42) and a first plug hole (43) are respectively provided at both ends of the upper section body (41), a first step is formed between the first plug post (42) and the upper section body (41), the first plug post (42) passes through the shoulder glenoid bushing (2) and is connected to the limiter (3), and the first step can block the humeral ball head (1) to limit the travel of the first plug post (42) relative to the humeral ball head (1); the upper section body (41) is provided with a first suture hole (44) and an attachment groove (45), and the attachment groove (45) is used to provide attachment conditions for a tendon or an artificial ligament.

6. The rotatable hemi-shoulder joint prosthesis according to claim 5, characterized in that: The osteotomy lower section (5) comprises a lower section body (51), and the two ends of the lower section body (51) are respectively provided with a second plug post (52) and a second plug hole (53), and the second plug post (52) is inserted into the first plug hole (43) and the two are tapered together; one end of the medullary cavity needle (6) is provided with a third plug post (61), and the third plug post (61) is inserted into the second plug hole (53) and the two are tapered together.

7. The rotatable hemi-shoulder joint prosthesis according to claim 1, characterized in that: The humeral ball head (1) is provided with a second suture hole (13), and the second suture hole (13) is used to suspend the humeral ball head (1) on the scapula; the end of the medullary cavity insertion needle (6) close to the lower osteotomy section (5) is provided with a biological coating, and the other end of the medullary cavity insertion needle (6) is provided with a spiral groove structure (62).

8. The rotatable hemi-shoulder joint prosthesis according to claim 7, characterized in that: The second suture hole (13) is used to suspend the humeral ball head (1) on the acromion.

9. The rotatable hemi-shoulder joint prosthesis according to claim 1, characterized in that: The humeral ball head (1) and the glenoid shroud (2) are both made of ultra-high molecular weight polyethylene material, and the stopper (3), the upper osteotomy section (4), the lower osteotomy section (5) and the medullary cavity pin (6) are all made of titanium alloy material.

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