A glenoid prosthesis used in total shoulder arthroplasty

Abstract

The present invention provides a glenoid prosthesis used in total shoulder arthroplasty, belonging to the field of medical device technology. It includes a glenoid implant, the end of the glenoid implant is provided with a mounting plate, the end of the mounting plate is provided with four groups of elastic telescopic rods at equal angles, the tail ends of the four groups of elastic telescopic rods are connected to push plates, the inner side of the mounting plate is provided with four groups of clamping blocks 1 at equal angles, and also includes a fixing component, the fixing component is installed at the end of the mounting plate, and the fixing component is used to fix the glenoid prosthesis. The present invention is provided with a fixing component, and the fastening screws provide radial support force to the clamping block 2 and the clamping block 1, so that the contact block on the contact plate can always be close to the bone mounting surface, and will not be loosened and fall off due to the inclination of the bone section, causing secondary damage to the patient's body.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a glenoid prosthesis used in total shoulder replacement surgery. Background Art

[0002] Total shoulder replacement is suitable for osteoarthritis, including primary and secondary, as well as rheumatoid arthritis, traumatic arthritis, rotator cuff injury arthritis, artificial shoulder joint revision, bone necrosis, tumors, shoulder joint dysplasia, old infection, etc.

[0003] For example, a glenoid prosthesis used in total shoulder replacement surgery with a publication number (CN111281620A) includes a glenoid implant and a glenoid support body; a groove is provided on the glenoid implant, and two through holes are provided on the bottom surface of the groove, screws are inserted in the through holes, and the ends of the screws can be inserted into the bone channels on the shoulder joint; a plurality of evenly distributed clamping blocks are fixedly connected to the inner wall of the groove, and a plurality of clamping plates corresponding to the clamping blocks are fixedly connected to the surface of the glenoid support body close to the glenoid implant, and a protrusion is integrally formed on the side wall of the clamping plate close to the clamping block... The patent fixes the glenoid implant to the shoulder joint by screws, so that the glenoid implant is installed more stably and the glenoid implant is prevented from loosening. The glenoid implant and the glenoid support body are connected by the cooperation of the clamping blocks and the clamping plates, so as to facilitate the replacement of the worn glenoid support body. However, its structure still needs to be improved, as follows:

[0004] In the case of existing patients with proximal humeral comminuted fractures, the bone section may have an oblique surface when the glenoid implant is implanted and fixed. In this case, the glenoid implant cannot always remain in close contact with the bone section, and the glenoid implant may loosen and fall off in the body after the operation, causing secondary damage to the patient's body. At the same time, proximal humeral comminuted fractures may result in the glenoid support block being unable to be far away from the humeral head, and the glenoid prosthesis of the appropriate size needs to be remade, which increases the cost of the operation and is likely to delay the patient's recovery.

[0005] Therefore, the present application provides a glenoid prosthesis used in total shoulder arthroplasty to meet the needs. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a glenoid prosthesis used in total shoulder arthroplasty to solve the problem that in the case of a comminuted fracture of the proximal humerus in existing patients, the glenoid implant may have an oblique cross-section on the bone when it is implanted and fixed. In this case, the glenoid implant cannot always remain in close contact with the bone cross-section, and after the operation, the glenoid implant may become loose and fall off in the body, causing secondary damage to the patient's body. At the same time, a comminuted fracture of the proximal humerus may result in the glenoid support block being unable to be far away from the humeral head, and a glenoid prosthesis of the appropriate size needs to be remade, which increases the cost of the operation and is likely to cause a delayed effect on the patient's recovery.

[0007] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0008] A glenoid prosthesis used in total shoulder arthroplasty comprises a glenoid implant, a mounting plate is provided at the end of the glenoid implant, four groups of elastic telescopic rods are equiangularly distributed at the end of the mounting plate, the tail ends of the four groups of elastic telescopic rods are connected to push plates, four groups of clamping blocks are equiangularly distributed on the inner side of the mounting plate, and further comprises a fixing component, which is mounted on the end of the mounting plate and is used to fix the glenoid prosthesis, a telescopic component, which is nested and mounted on the inner side of the glenoid implant and is used to adjust the connection length of the prosthesis, and a locking component, which is mounted on the end of the glenoid implant and is used to lock the telescopic component.

[0009] Optionally, the fixing assembly includes an anchor block, which is installed at the end of the mounting plate, and four groups of connecting rods 1 are arranged at the end of the anchor block at equal angles, and the four groups of connecting rods 1 rotate on the outside of the anchor block.

[0010] Optionally, the inner sides of the slide grooves of the four groups of connecting rods 1 are respectively connected to connecting rods 2, and rings are connected between the four groups of connecting rods 2. The rings slide on the outer sides of the anchor blocks, and the tail ends of the four groups of connecting rods 1 are respectively connected to contact plates.

[0011] Optionally, the bottom surfaces of the four groups of contact plates are equidistantly provided with contact blocks, the inner sides of the four groups of contact plates are penetrated with guide holes, the inner sides of the guide holes are provided with screws, the inner sides of the anchor blocks are equiangularly distributed with four groups of clamping blocks 2, the four groups of clamping blocks 2 can be clamped with the four groups of clamping blocks 1, and the outer sides of the four groups of clamping blocks 1 are threadedly connected with fastening screws.

[0012] Optionally, the anchor block is made of titanium-zirconium alloy material, the connecting rod 2 slides inside the corresponding sliding groove of the connecting rod 1, the contact plate rotates at the tail end of the connecting rod 1, the contact plate is made of titanium alloy material, the contact block is set to be rectangular, the guide hole and the contact plate surface are inclined at an angle of 40~60°, the clamping block 2 is made of titanium alloy material, and the cutting surface of the clamping block 2 is an arc shape.

[0013] Optionally, the telescopic assembly includes a threaded sleeve, which is arranged on the inner side of the glenoid implant, the inner side of the threaded sleeve is threadedly connected to the telescopic sleeve, the inner side of the telescopic sleeve is threadedly connected to a threaded shaft, the end of the threaded shaft is connected to a glenoid support block, and two groups of fixing holes are symmetrically arranged on the outer side of the glenoid support block.

[0014] Optionally, rectangular threads are provided on the inner side of the threaded sleeve and the outer side of the telescopic sleeve, and the glenoid support block is made of polyethylene material.

[0015] Optionally, the locking assembly includes a telescopic rod, which is nested and installed on the inner side of the glenoid implant, and two groups of telescopic rods are symmetrically arranged on the inner side of the glenoid implant, and the inner side of the telescopic end of the telescopic rod is threadedly connected with a locking bolt.

[0016] Optionally, the end of the telescopic rod is connected to a movable plate, the movable plate is rotatably installed at the end of the telescopic rod, the end of the movable plate is connected to a bayonet, the tail end of the movable plate is connected to a mounting block, the tail end of the mounting block is connected to a spring, and the tail end of the spring is connected to the outside of the telescopic rod.

[0017] Optionally, the contact end of the locking bolt is set with an angle of 30-40°, the locking bolt is made of wear-resistant material, the bayonet is set perpendicular to the fixing hole, and the mounting block rotates at the rear end of the movable plate.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] In the above scheme, a fixing component is provided, and the mounting plate is placed at the tail end of the anchor block, and the clamping block 1 and the clamping block 2 are aligned, and the mounting plate is pushed toward the side of the bone mounting surface, so that the clamping block 1 and the clamping block 2 are clamped together through the clamping groove. At this time, the push plates at the ends of the four groups of elastic telescopic rods are respectively in contact with the ends of the guide holes of the contact plates on the corresponding sides, and the four groups of elastic telescopic rods are compressed by the extrusion force, and the push plates squeeze the contact plates to prevent the anchor block from falling off due to the loosening of the screws, and the fastening screws are screwed in from the end of the glenoid implant, and are connected and fixed to each other through the threads on the outer sides of the four groups of clamping blocks 2 and the fastening screws. The clamping block 2 squeezes the clamping block 1, and the fastening screws provide radial support force to the clamping block 2 and the clamping block 1, so that the contact blocks on the contact plate can always be close to the bone mounting surface, and will not be loosened and fall off due to the inclination of the bone section, causing secondary damage to the patient's body.

[0020] By setting up the telescopic component, the glenoid support block is connected to the inner thread of the telescopic sleeve through the threaded shaft, and the outer thread of the telescopic sleeve is connected to the threaded sleeve on the inner side of the glenoid implant. According to the assembly distance between the glenoid support block and one side of the humeral head, the telescopic sleeve is rotated toward the side of the mounting plate to adjust the extended length of the telescopic sleeve, which is convenient for the operator to install, improves the versatility of the prosthesis installation, reduces the cost of surgery, and reduces the possibility of patients delaying the optimal recovery period.

[0021] By setting a locking component, adjusting the telescopic rods on both sides of the end of the glenoid implant to an appropriate length, the locking bolt is screwed into the threaded sleeve of the telescopic rod, so that the bottom end of the locking bolt contacts the pitch bottom contact surface of the outer thread of the telescopic sleeve, and the threaded contact surface is locked to prevent the telescopic sleeve from rotating outward and disengaging from the threaded sleeve. The operator manually presses the movable plates on both sides toward the side wall of the telescopic rod at the same time, and the movable plates rotate on the outer wall of the telescopic rod, so that the mounting block is subjected to force to compress the spring, and the bayonet is lifted away from the outer side of the glenoid support block. When approaching the fixing hole, the pressed movable plates on both sides are released, the spring returns to its original state, and the mounting block is lifted in the recovery direction of the spring, so that the movable plate rotates on the outer wall of the telescopic rod toward the outer side of the glenoid support block, thereby inserting the bayonet into the fixing hole, fixing the glenoid support block, and preventing the glenoid support block from loosening and falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the glenoid prosthesis used in total shoulder arthroplasty;

[0024] Figure 2 This is a 3D cross-sectional view of the glenoid prosthesis used in total shoulder arthroplasty;

[0025] Figure 3 for Figure 2 A magnified image of point A;

[0026] Figure 4 It is a schematic diagram of the three-dimensional structure of the fixed component;

[0027] Figure 5 for Figure 4 The enlarged view of point B;

[0028] Figure 6 It is a schematic diagram of the three-dimensional structure of the anchor block, the connecting rod 1 and the connecting rod 2;

[0029] Figure 7 It is a schematic diagram of the three-dimensional structure of the telescopic component;

[0030] Figure 8 It is a schematic diagram of the three-dimensional structure of the locking assembly;

[0031] Fig. 9 A schematic diagram of the three-dimensional structure of the threaded shaft, the glenoid support block and the fixing hole assembly;

[0032] Fig.10 This is an exploded view of the three-dimensional structure of the glenoid prosthesis used in total shoulder arthroplasty.

[0033] [Reference Signs]

[0034] 1. glenoid implant; 2. mounting plate; 3. elastic telescopic rod; 4. push plate; 5. fixing assembly; 51. anchor block; 52. connecting rod one; 53. connecting rod two; 54. collar; 55. contact plate; 56. contact block; 57. guide hole; 58. screw; 59. clamping block two; 510. fastening screw; 6. telescopic assembly; 61. threaded hole; 62. telescopic sleeve; 63. threaded shaft; 64. glenoid support block; 65. fixing hole; 7. locking assembly; 71. telescopic rod; 72. locking bolt; 73. movable plate; 74. bayonet; 75. mounting block; 76. spring; 8. clamping block one.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments. DETAILED DESCRIPTION

[0036] The following is a detailed description of a glenoid prosthesis used in total shoulder arthroplasty provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0037] It should be noted that the references to "one embodiment", "embodiment", "exemplary embodiments", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0038] In general, a term can be understood, at least in part, from its use in context. For example, depending, at least in part, on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey an exclusive set of factors, but can instead, depending, at least in part, on the context, allow for the presence of other factors that are not necessarily explicitly described.

[0039] It will be understood that the meanings of “on,” “over,” and “above” in the present invention should be interpreted in the broadest manner, so that “on” not only means “directly on” something, but also includes the meaning of being “on” something with intervening features or layers therebetween, and “on” or “over” not only means “on” or “above” something, but also includes the meaning of being “on” or “above” something with no intervening features or layers therebetween.

[0040] Additionally, spatially relative terms such as "under," "beneath," "lower," "above," "upper," and the like may be used herein for descriptive convenience to describe the relationship of one element or feature to another element or features, as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially relative descriptors used herein may be similarly interpreted accordingly.

[0041] like Figure 1 , Figure 2 and Fig.10As shown, an embodiment of the present invention provides a glenoid prosthesis used in total shoulder arthroplasty, including a glenoid implant 1, a mounting plate 2 is provided at the end of the glenoid implant 1, four groups of elastic telescopic rods 3 are equiangularly distributed at the end of the mounting plate 2, the tail ends of the four groups of elastic telescopic rods 3 are connected to push plates 4, four groups of clamping blocks 8 are equiangularly distributed on the inner side of the mounting plate 2, and also includes a fixing component 5, the fixing component 5 is installed at the end of the mounting plate 2, and the fixing component 5 is used to fix the glenoid prosthesis, a telescopic component 6, the telescopic component 6 is nested and installed on the inner side of the glenoid implant 1, and the telescopic component 6 is used to adjust the connection length of the prosthesis, and a locking component 7, the locking component 7 is installed at the end of the glenoid implant 1, and the locking component 7 is used to lock the telescopic component 6.

[0042] like Figures 1 to 6 and Fig.10 As shown, the fixing assembly 5 includes an anchor block 51, which is installed at the end of the mounting plate 2. Four groups of connecting rods 52 are arranged at equal angles at the end of the anchor block 51, and the four groups of connecting rods 52 rotate on the outside of the anchor block 51.

[0043] like Figures 1 to 6 and Fig.10 As shown, the inner sides of the slide grooves of the four groups of connecting rods 1 52 are respectively connected to connecting rods 2 53 , and the four groups of connecting rods 2 53 are connected with collars 54 , which slide on the outer sides of the anchor blocks 51 , and the tail ends of the four groups of connecting rods 1 52 are respectively connected to contact plates 55 .

[0044] like Figures 1 to 6 and Fig.10 As shown, the bottom surfaces of the four groups of contact plates 55 are equidistantly provided with contact blocks 56, the inner sides of the four groups of contact plates 55 are penetrated with guide holes 57, the inner sides of the guide holes 57 are provided with screws 58, the inner sides of the anchor blocks 51 are equiangularly provided with four groups of clamping blocks 2 59, the four groups of clamping blocks 2 59 can be clamped with the four groups of clamping blocks 1 8, and the outer sides of the four groups of clamping blocks 1 8 are threadedly connected with fastening screws 510;

[0045] The operator first cuts the bone end surface on one side of the shoulder joint, drills a countersunk hole at the cut position, inserts the anchor block 51 into the countersunk hole, manually pushes the collar 54 toward the end of the anchor block 51, and makes the connecting rod 2 53 slide in the slide groove of the connecting rod 1 52, supports the connecting rod 1 52, and makes the contact plate 55 approach the bone mounting surface, so that the four groups of contact blocks 56 can be close to the mounting surface of the inner side of the countersunk hole on one side of the shoulder joint, and screws the four groups of screws 58 into the corresponding guide holes 57 on the contact plates 55, respectively, and implants the corresponding screws 58 into the inner side of the mounting surface of the inner side of the countersunk hole through the guidance of the guide holes 57, and the four groups of screws 58 respectively form an angle of 40 to 60 degrees with the bone mounting surface, so that the four groups of screws 58 are centered on the anchor block 51 and distribute the installation stress to the surrounding areas of the bone mounting surface, and then the operator places the mounting plate 2 on the The tail end of the anchor block 51 is aligned with the clamping block 1 8 and the clamping block 2 59, and the mounting plate 2 is pushed toward the bone mounting surface, so that the clamping block 1 8 and the clamping block 2 59 are clamped together through the clamping groove. At this time, the push plates 4 at the ends of the four groups of elastic telescopic rods 3 are respectively in contact with the ends of the guide holes 57 of the contact plates 55 on the corresponding side. The four groups of elastic telescopic rods 3 are compressed by the extrusion force, and the push plates 4 squeeze the contact plates 55 to prevent the screws 58 from loosening and causing the anchor block 51 to fall off. The fastening screws 510 are screwed in from the end of the glenoid implant 1, and are connected and fixed to each other through the threads on the outer sides of the four groups of clamping blocks 2 59 and the fastening screws 510. The clamping block 2 59 squeezes the clamping block 1 8, and the fastening screws 510 provide radial support force to the clamping block 2 59 and the clamping block 1 8 to prevent the clamping from loosening, so that the glenoid implant 1 is fixedly nested in the inner side of the countersunk hole.

[0046] In this embodiment, the anchor block 51 is made of titanium-zirconium alloy material, has good mechanical strength, and will not cause negative impact on the human body. The connecting rod 2 53 slides on the inner side of the corresponding connecting rod 1 52. The contact plate 55 rotates at the tail end of the connecting rod 1 52. The contact plate 55 is made of titanium alloy material to reduce the weight of the contact plate 55 and will not cause negative impact on the human body when it contacts the bone. The contact block 56 is set to be rectangular to improve the contact stability with the bone section. The guide hole 57 and the surface of the contact plate 55 are inclined at an angle of 40~60° to prevent the uneven force during the installation of the screw 58, which causes the glenoid implant 1 to fall off in the human body. The clamping block 2 59 is made of titanium alloy material to improve the service life of the clamping block 2 59. The cutting surface of the clamping block 2 59 is an arc shape.

[0047] like Figure 1 , Figure 7 , Fig. 9 and Fig.10As shown, the telescopic assembly 6 includes a threaded sleeve 61, which is arranged on the inner side of the glenoid implant 1, the inner side of the threaded sleeve 61 is threadedly connected to a telescopic sleeve 62, the inner side of the telescopic sleeve 62 is threadedly connected to a threaded shaft 63, the end of the threaded shaft 63 is connected to a glenoid support block 64, and the outer side of the glenoid support block 64 is symmetrically provided with two groups of fixing holes 65;

[0048] The glenoid support block 64 is connected to the inner thread of the telescopic sleeve 62 through the threaded shaft 63, and the outer thread of the telescopic sleeve 62 is connected to the threaded sleeve 61 on the inner side of the glenoid implant 1. According to the assembly distance between the glenoid support block 64 and one side of the humeral head, the telescopic sleeve 62 is rotated toward the side of the mounting plate 2 to adjust the extension length of the telescopic sleeve 62, so as to facilitate the installation of the operator and improve the versatility of the prosthesis installation. The operator adjusts the telescopic rods 71 ​​on both sides of the end of the glenoid implant 1 to a suitable length, screws the locking bolt 72 into the threaded hole of the telescopic rod 71, so that the bottom end of the locking bolt 72 is on the contact surface with the bottom of the pitch of the outer thread of the telescopic sleeve 62, and the thread contact surface is locked to prevent the telescopic sleeve 62 from rotating outward and disengaging from the threaded sleeve 61.

[0049] In this embodiment, rectangular threads are provided on the inner side of the threaded sleeve 61 and the outer side of the telescopic sleeve 62 to improve the fixing stability of the locking bolt 72 on the outer side of the telescopic sleeve 62. The glenoid support block 64 is made of polyethylene material to prevent the glenoid support from wearing the humeral head.

[0050] like Figures 1 to 3 , Figure 8 and Fig.10 As shown, the locking assembly 7 includes a telescopic rod 71, which is nested and installed on the inner side of the glenoid implant 1, and two groups of telescopic rods 71 ​​are symmetrically arranged on the inner side of the glenoid implant 1, and the inner side of the telescopic end of the telescopic rod 71 is threadedly connected with a locking bolt 72.

[0051] like Figures 1 to 3 , Figure 8 and Fig.10 As shown, the end of the telescopic rod 71 is connected to a movable plate 73, the movable plate 73 is rotatably installed at the end of the telescopic rod 71, the end of the movable plate 73 is connected to a bayonet 74, the tail end of the movable plate 73 is connected to a mounting block 75, the tail end of the mounting block 75 is connected to a spring 76, and the tail end of the spring 76 is connected to the outside of the telescopic rod 71;

[0052] The operator adjusts the telescopic rods 71 ​​on both sides of the end of the glenoid implant 1 to a suitable length, screws the locking bolt 72 into the threaded hole of the telescopic rod 71, makes the bottom end of the locking bolt 72 contact with the bottom of the pitch of the outer thread of the telescopic sleeve 62, locks the thread contact surface, and prevents the telescopic sleeve 62 from rotating outward and separating from the threaded sleeve 61. The operator manually presses the movable plates 73 on both sides toward the side wall of the telescopic rod 71 at the same time, and the movable plates 73 rotate on the outer wall of the telescopic rod 71, so that the mounting block 75 is subjected to force to compress the spring 76. The latch 74 is lifted away from the outer side of the glenoid support block 64. When it is close to the fixing hole 65, the pressed movable plates 73 on both sides are released, and the springs 76 return to their original state. The mounting block 75 is lifted in the direction of the spring 76's recovery, so that the movable plates 73 rotate on the outer side wall of the telescopic rod 71 toward the outer side of the glenoid support block 64, so that the latch 74 is inserted into the fixing hole 65, the glenoid support block 64 is fixed, and the prosthesis on one side of the humeral head is connected to the glenoid support block 64, completing the installation of the glenoid prosthesis.

[0053] In this embodiment, the contact end of the locking bolt 72 is set with an angle of 30~40°, which improves the fixing stability of the locking bolt 72 on the outside of the telescopic sleeve 62. The locking bolt 72 uses wear-resistant material to improve the service life of the locking bolt 72. The pin 74 is set perpendicular to the fixing hole 65 to improve the locking effect of the pin 74 in the fixing hole 65. The mounting block 75 rotates at the tail end of the movable plate 73.

[0054] The working process of the present invention is as follows:

[0055] The operator first cuts the bone end surface on one side of the shoulder joint, drills a countersunk hole at the cut position, inserts the anchor block 51 into the countersunk hole, manually pushes the collar 54 toward the end of the anchor block 51, and makes the connecting rod 2 53 slide in the slide groove of the connecting rod 1 52, supports the connecting rod 1 52, and makes the contact plate 55 approach the bone mounting surface, so that the four groups of contact blocks 56 can be close to the mounting surface of the inner side of the countersunk hole on one side of the shoulder joint, and screws the four groups of screws 58 into the corresponding guide holes 57 on the contact plates 55, respectively, and implants the corresponding screws 58 into the inner side of the mounting surface of the inner side of the countersunk hole through the guidance of the guide holes 57, and the four groups of screws 58 respectively form an angle of 40 to 60 degrees with the bone mounting surface, so that the four groups of screws 58 are centered on the anchor block 51 and distribute the installation stress to the surrounding areas of the bone mounting surface, and then the operator places the mounting plate 2 on the The tail end of the anchor block 51 is aligned with the clamping block 1 8 and the clamping block 2 59, and the mounting plate 2 is pushed toward the bone mounting surface, so that the clamping block 1 8 and the clamping block 2 59 are clamped together through the clamping groove. At this time, the push plates 4 at the ends of the four groups of elastic telescopic rods 3 are respectively in contact with the ends of the guide holes 57 of the contact plates 55 on the corresponding side. The four groups of elastic telescopic rods 3 are compressed by the extrusion force, and the push plates 4 squeeze the contact plates 55 to prevent the screws 58 from loosening and causing the anchor block 51 to fall off. The fastening screws 510 are screwed in from the end of the glenoid implant 1, and are connected and fixed to each other through the threads on the outer sides of the four groups of clamping blocks 2 59 and the fastening screws 510. The clamping block 2 59 squeezes the clamping block 1 8, and the fastening screws 510 provide radial support force to the clamping block 2 59 and the clamping block 1 8 to prevent the clamping from loosening, so that the glenoid implant 1 is fixedly nested in the inner side of the countersunk hole.

[0056] The glenoid support block 64 is connected to the inner thread of the telescopic sleeve 62 through the threaded shaft 63, and the outer thread of the telescopic sleeve 62 is connected to the threaded sleeve 61 on the inner side of the glenoid implant 1. According to the assembly distance between the glenoid support block 64 and one side of the humeral head, the telescopic sleeve 62 is rotated toward the side of the mounting plate 2 to adjust the extension length of the telescopic sleeve 62, which is convenient for the operator to install and improves the versatility of the prosthesis installation. The operator adjusts the telescopic rods 71 ​​on both sides of the end of the glenoid implant 1 to a suitable length, screws the locking bolt 72 into the threaded hole of the telescopic rod 71, so that the bottom end of the locking bolt 72 contacts the bottom of the pitch of the outer thread of the telescopic sleeve 62, locks the thread contact surface, and prevents the telescopic sleeve 62 from rotating outward and disengaging from the thread. The sleeve 61 is manually pressed by the operator, and the movable plates 73 on both sides are simultaneously pressed toward the side wall of the telescopic rod 71. The movable plates 73 rotate on the outer side wall of the telescopic rod 71, so that the mounting block 75 is subjected to force to compress the spring 76, and the latch 74 is lifted away from the outer side of the glenoid support block 64. When it is close to the fixing hole 65, the pressed movable plates 73 on both sides are released, and the spring 76 returns to its original state, and the mounting block 75 is lifted in the recovery direction of the spring 76, so that the movable plates 73 rotate on the outer side wall of the telescopic rod 71 toward the outer side of the glenoid support block 64, so that the latch 74 is inserted into the fixing hole 65, the glenoid support block 64 is fixed, and the prosthesis on one side of the humeral head is connected to the glenoid support block 64, completing the installation of the glenoid prosthesis.

[0057] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0058] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A glenoid prosthesis used in total shoulder arthroplasty, characterized in that: It comprises a glenoid implant, the end of the glenoid implant is provided with a mounting plate, the end of the mounting plate is provided with four groups of elastic telescopic rods at equal angles, the tail ends of the four groups of elastic telescopic rods are connected with push plates, and the inner side of the mounting plate is provided with four groups of clamping blocks at equal angles; Also included is a fixing assembly, which is mounted on the end of the mounting plate and is used to fix the glenoid prosthesis; A telescopic component, the telescopic component is nested and installed inside the glenoid implant, and the telescopic component is used to adjust the connection length of the prosthesis; A locking assembly, the locking assembly being mounted on the end of the glenoid implant and being used to lock the telescopic assembly; The fixing assembly comprises an anchor block, the anchor block is mounted on the end of the mounting plate, four groups of connecting rods 1 are arranged at equal angles on the end of the anchor block, and the four groups of connecting rods 1 rotate on the outside of the anchor block; The inner sides of the sliding grooves of the four groups of connecting rods one are respectively connected to connecting rods two, and the four groups of connecting rods two are connected with collars, and the collars slide on the outer sides of the anchor blocks, and the tail ends of the four groups of connecting rods one are respectively connected to contact plates, and the connecting rods two slide on the inner sides of the corresponding sliding grooves of the connecting rods one, and the contact plates rotate at the tail ends of the connecting rods one; The bottom surfaces of the four groups of contact plates are equidistantly provided with contact blocks, the inner sides of the four groups of contact plates are penetrated with guide holes, the inner sides of the guide holes are provided with screws, the inner sides of the anchor blocks are equiangularly provided with four groups of clamping blocks 2, the four groups of clamping blocks 2 can be clamped with the four groups of clamping blocks 1, and the outer sides of the four groups of clamping blocks 1 are threadedly connected with fastening screws; The telescopic assembly comprises a threaded sleeve, the threaded sleeve is arranged on the inner side of the glenoid implant, the inner side of the threaded sleeve is threadedly connected to the telescopic sleeve, the inner side of the telescopic sleeve is threadedly connected to a threaded shaft, the end of the threaded shaft is connected to a glenoid support block, and the outer side of the glenoid support block is symmetrically provided with two groups of fixing holes; The locking assembly comprises a telescopic rod, the telescopic rod is nested and installed inside the glenoid implant, and two groups of telescopic rods are symmetrically arranged inside the glenoid implant, and the inner side of the telescopic end of the telescopic rod is threadedly connected with a locking bolt; The end of the telescopic rod is connected to a movable plate, and the movable plate is rotatably installed at the end of the telescopic rod. The end of the movable plate is connected to a bayonet, and the tail end of the movable plate is connected to a mounting block, and the mounting block rotates at the tail end of the movable plate. The tail end of the mounting block is connected to a spring, and the tail end of the spring is connected to the outside of the telescopic rod.

2. The glenoid prosthesis used in total shoulder arthroplasty according to claim 1, characterized in that: The anchor block is made of titanium-zirconium alloy material, the contact plate is made of titanium alloy material, the contact block is set to be rectangular, the guide hole and the contact plate surface are inclined at an angle of 40 to 60 degrees, the clamping block 2 is made of titanium alloy material, and the cutting surface of the clamping block 2 is arc-shaped.

3. The glenoid prosthesis used in total shoulder arthroplasty according to claim 1, characterized in that: The inner side of the threaded sleeve and the outer side of the telescopic sleeve are provided with rectangular threads, and the glenoid support block is made of polyethylene material.

4. The glenoid prosthesis used in total shoulder arthroplasty according to claim 1, characterized in that: The contact end of the locking bolt is provided with an angle of 30-40°, the locking bolt is made of wear-resistant material, and the bayonet is provided perpendicular to the fixing hole.

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