Shoulder glenoid side guide plate for reverse shoulder joint replacement
By designing a glenoid side guide plate for reverse shoulder joint replacement, and using a rotating shell and positioning block to adjust the position of the stop section, the problem of inaccurate positioning by traditional glenoid locators is solved. This achieves accurate positioning of the glenoid prosthesis, shortens the operation time, and reduces the risk of organ damage.
Patent Information
- Application Number
- CN202423083955.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2034-12-13
AI Technical Summary
In traditional shoulder replacement surgery, the glenoid locator is difficult to position accurately, which affects the tightening of the glenoid base screws and may lead to prosthesis loosening. In addition, the operation time is long and there is a risk of organ damage.
A glenoid lateral guide plate for reverse shoulder arthroplasty is designed. The position of the stop part is adjusted by rotating the shell surface, and the position of the Steinman needle and glenoid reamer is determined by the positioning block and positioning post, which simplifies the surgical operation.
It improves the accuracy and efficiency of glenoid prosthesis installation, reduces operation time and the risk of organ damage, and simplifies the guidance and positioning process.
Smart Images
Figure CN223944472U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a kind of reverse shoulder joint replacement glenoid side guide plate, belong to medical instrument field. BACKGROUND
[0002] Current clinical reverse shoulder joint replacement adopts traditional tool surgery, and the traditional tool is used to determine the orientation of the position of glenoid side Steinmann needle after opening surgical approach with glenoid positioner, and according to the feedback of clinic, the following shortcomings are summarized:
[0003] 1, the opening of shoulder joint replacement surgery is small, and the morphology of the glenoid of patients is quite different (defects or wear), so it is difficult to find a position with sufficient bone mass using the traditional glenoid positioner, which may affect the tightening of the central screw of glenoid base and lead to loosening of glenoid side prosthesis in the later period.
[0004] 2, the glenoid guide of traditional tool is influenced by the experience of doctors during positioning, and the guide plate Steinmann needle is deflected, which may even cause damage to internal organs.
[0005] 3, it is difficult to find the accurate position of Steinmann needle and guide using the glenoid base of traditional tool, so it is often necessary to find and determine the position for several times, which may greatly prolong the operation time.
[0006] Therefore, it is necessary to improve the existing reverse shoulder joint replacement glenoid side guide plate to solve the above problems. CONTENT OF THE UTILITY MODEL
[0007] To solve the above technical problems, the utility model provides a kind of reverse shoulder joint replacement glenoid side guide plate, the guide plate can adjust the position of gear position part by rotating shell surface, and then limit glenoid in attachment area by gear position part to determine the position of Steinmann needle, and then determine the position and guide of glenoid reamer.
[0008] The technical scheme of the utility model is:
[0009] A kind of reverse shoulder joint replacement glenoid side guide plate, with the attachment face attached to the surface of glenoid and the shell surface for driving rotation, the guide plate includes base body and positioning block arranged on the periphery of the base body, the positioning block is at least provided with three, and all protrude towards the attachment face, to form attachment area for accommodating the glenoid on the attachment face, the positioning block is provided with gear position part towards the attachment area, the glenoid is limited in the attachment area by multiple gear position parts, one side of the shell surface of the base body has outwardly extending positioning column, the positioning column penetrates to the attachment area and forms first needle hole.
[0010] As a further improvement of the utility model, the cross-sectional width of the positioning block gradually decreases in the vertical direction perpendicular to the horizontal plane.
[0011] As a further improvement of the utility model, the guide plate has a center line perpendicular to the horizontal plane, and the included angle between the positioning column and the center line is between 10-30°.
[0012] As a further improvement of the utility model, the guide plate is further provided with a positioning portion on the outer periphery of the base body, the positioning portion penetrates and forms a second needle hole, and the second needle hole is located outside the attaching area.
[0013] As a further improvement of the utility model, the base body is hollow and has a rib connecting the positioning column and the base body, and the rib is at least three and is spaced apart and connected to the inner wall surface of the base body.
[0014] As a further improvement of the utility model, one of the ribs is arranged close to the positioning portion, the line connecting the rib and the positioning column is defined as a first connecting line, the line connecting the positioning portion and the positioning column is defined as a second connecting line, and the included angle between the first connecting line and the second connecting line is between 10°-15°.
[0015] As a further improvement of the utility model, a chamfer is arranged at the connection between the rib and the positioning column and / or the base body on the side of the rib facing the adjacent rib.
[0016] As a further improvement of the utility model, in the horizontal direction, the straight-line distance from the second needle hole to the center of the base body is greater than the straight-line distance from the positioning block to the center of the base body.
[0017] As a further improvement of the utility model, the line connecting the positioning portion and the center of the base body has an extension line, one side of the extension line has three positioning blocks, and the other side of the extension line has two positioning blocks.
[0018] As a further improvement of the utility model, each positioning block is arranged irregularly on the opposite sides of the extension line.
[0019] The utility model has the beneficial technical effects that: the utility model sets at least three positioning blocks protruding towards the attaching surface of the guide plate on the outer periphery of the base body of the guide plate, so as to form an attaching area for accommodating the glenoid on the attaching surface, the positioning blocks are provided with a blocking portion towards the attaching area, the position of the blocking portion is adjusted by rotating the shell surface of the guide plate, so that the glenoid is limited in the attaching area by the multiple blocking portions, thus, the positioning of the guide plate is realized; meanwhile, one side of the shell surface of the base body has a positioning column extending outward, the positioning column penetrates to the attaching area and forms a first needle hole, thus, the position and the guide of the reamer for the glenoid can be determined by punching a Steinmann needle in the first needle hole, the operation is simple, and the utility model has practicality. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 is a structure schematic view of the reverse shoulder joint replacement glenoid side guide plate according to the preferred embodiment of the present application.
[0021] Figure 2 is Figure 1 is another angle structure schematic view of the reverse shoulder joint replacement glenoid side guide plate. DETAILED DESCRIPTION
[0022] In order to more clearly understand the technical means of the present application, and can be implemented according to the content of the description, the following embodiments, the specific embodiments of the present application are further described in detail, the following examples are used to illustrate the present application, but not to limit the scope of the present application.
[0023] Please refer to Figure 1 and Figure 2 The present application discloses a kind of reverse shoulder joint replacement glenoid side guide plate 100, including with the adhering face 200 of adhering to joint glen surface and the shell surface 300 for driving rotation, when using, by driving the shell surface 300 rotation, so that the adhering face 200 completely adheres on the joint glen.
[0024] The guide plate 100 includes base body 1 and the positioning block 2 of the ring set in the outer periphery of the base body 1, the positioning block 2 is at least provided with three, and all protrude towards the adhering face 200, to form the adhering area 20 for containing the joint glen on the adhering face 200, the positioning block 2 is provided with the blocking part 21 towards the adhering area 20, the joint glen is limited in the adhering area 20 by multiple blocking parts 21. Preferably, in the vertical direction perpendicular to horizontal plane, the cross-sectional width of the positioning block 2 gradually decreases, the blocking part 21 is formed in the end of the cross-sectional width of the positioning block 2 smaller. It can be understood that, in the embodiment, the blocking part 21 is the extended blocking piece, in other embodiments, it can be other buckles etc., which are not limited.
[0025] In the embodiment, by rotating the shell surface 300, multiple blocking parts 21 can be driven to adjust the position relative to the joint glen, so that the adhering area 20 is completely adhered on the joint glen. At this time, the position of the entire guide plate 100 can be determined. Preferably, the shape of the guide plate 100 is adapted to the shape of the prosthesis in subsequent surgical engineering, and the doctor can also preliminarily judge the condition of the prosthesis installation when using the guide plate 100 according to the position of the guide plate 100.
[0026] One side of the shell surface 300 of the base body 1 has an outwardly extending positioning column 3 which penetrates the attachment area 20 and forms a first needle hole 30. In the present embodiment, the first needle hole 30 is used for punching a Steinmann pin which can be used to determine the position and orientation of a glenoid reamer to facilitate subsequent surgery.
[0027] Preferably, the guide plate 100 is defined to have a center line perpendicular to the horizontal plane, and the included angle between the positioning column 3 and the center line is between 10-30°. That is, the positioning column 3 is arranged obliquely, which can ensure the depth and firmness of the Steinmann pin.
[0028] In the present embodiment, the guide plate 100 is further provided with a positioning portion 4 on the outer periphery of the base body 1, and the positioning portion 4 penetrates and forms a second needle hole 40. In the horizontal direction, the straight-line distance from the second needle hole 40 to the center of the base body 1 is greater than the straight-line distance from the positioning block 2 to the center of the base body 1, so that the second needle hole 40 is located outside the attachment area 20. Preferably, the second needle hole 40 is used for punching a 2.5㎜ Kirschner wire. In this way, through the Kirschner wire, the position of one of the holes of the glenoid base peripheral hole (having a central hole corresponding to the positioning column, and a peripheral hole outside the central hole) can be corresponded to the 2.5㎜ Kirschner wire to determine the fixed position of the glenoid base peripheral screw during subsequent drilling of the glenoid base peripheral hole by a guide rail.
[0029] In actual operation, after the Steinmann pin and the Kirschner wire are punched, the guide plate 100 is to be disassembled, and then the glenoid base peripheral hole is drilled by a guide rail. At this time, the central hole and one of the peripheral holes are respectively sleeved on the Steinmann pin and the Kirschner wire, which determines the position of the glenoid base, so that the screw locking can be performed on the remaining peripheral holes.
[0030] In other words, when the guide plate 100 is rotated to completely attach the glenoid by the plurality of blocking portions 21 to the attachment area 20, the positions of the first needle hole 30 and the second needle hole 40 are determined. The fixed position of the subsequent glenoid base peripheral screw can be quickly positioned by punching the Steinmann pin in the first needle hole 30 and the Kirschner wire in the second needle hole 40.
[0031] In the present embodiment, the base body 1 is hollowly arranged and has a rib 5 connecting the positioning column 3 and the base body 1, and the rib 5 is arranged at least three and is spaced apart and connected to the inner wall surface of the base body 1. By arranging the rib 5, the structure of the entire base body 1 can be strengthened, and at the same time, the weight of the entire base body 1 is reduced.
[0032] Preferably, one of the ribs 5 is arranged close to the positioning part 4, defining a first connecting line of the rib 5 and the positioning column 3, and a second connecting line of the positioning part 4 and the positioning column 3, and the included angle between the first connecting line and the second connecting line is between 10° and 15°. In this way, when the shell surface 300 is rotated, the position of the rib 5 can also be used to determine the installation position of the prosthesis during rotation.
[0033] Preferably, on the side of one of the ribs 5 facing the adjacent rib 5, a chamfer 50 is arranged at the connection of the rib 5 and the positioning column 3 and / or the base body 1. The chamfer 50 is used to reduce the stress of the rib 5.
[0034] In the embodiment, the positioning block 2 is provided with five, defining an extended line of the connecting line of the positioning part 4 and the center of the base body 1, on opposite sides of the extended line, one side has three positioning blocks 2, and the other side has two positioning blocks 2, and each of the positioning blocks 2 is arranged irregularly on the opposite sides of the extended line. That is, the arrangement and number of the positioning blocks 2 can be adjusted according to the structure of the glenoid of the surgical target, without being limited in angle and position, and the three-dimensional reconstruction of the shoulder joint of the patient can be used as the design basis of the positioning block 2 and the attachment surface 200 through the scanned CT data, so as to ensure that the guide plate 100 can attach the glenoid.
[0035] Operation process: after the doctor opens the surgical approach of the shoulder joint, the guide plate 100 is used to attach the glenoid, and when the doctor confirms that the attached position meets the requirements, a Steinmann needle can be punched through the first needle hole 30 reserved in the center of the guide plate 100, and then a 2.5㎜ Kirschner needle is punched through the second needle hole of the guide plate 100. The Steinmann needle is used to determine the position and guide of the glenoid reamer, and the 2.5㎜ Kirschner needle is used to determine the positions of the four peripheral screws by corresponding the position of one of the peripheral holes of the glenoid base with the 2.5㎜ Kirschner needle when the guide rail is used to drill the peripheral holes of the glenoid base.
[0036] In summary, the utility model discloses a kind of reverse shoulder joint replacement glenoid lateral guide plate 100, at least three positioning blocks 2 of the attachment area 20 for accommodating glenoid are formed on the attachment surface 200 by being provided on the outer periphery of the guide plate 100 base body 1, the positioning block 2 is provided with the blocking portion 21 towards the attachment area 20, by rotating the shell surface 300 of the guide plate 100, the position of the blocking portion 21 is adjusted, so that glenoid is limited in attachment area 20 by multiple blocking portions 21, so, the positioning of the guide plate 100 is realized;Meanwhile, the shell surface 300 of the base body 1 has a positioning column 3 extending outward on one side, the positioning column 3 penetrates to the attachment area 20 and forms a first pinhole 30, so, by hitting Stannard needle in the first pinhole 30, the position and guide of glenoid reamer can be determined, simple operation, with practicality.
[0037] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model, it should be pointed out, for ordinary skilled person in the art, without departing from the technical principle of the utility model, can also make a number of improvements and variations, these improvements and variations also should be regarded as the protection scope of the utility model.
Claims
1. A glenoid lateral guide plate for reverse shoulder joint replacement, characterized in that, The guide plate (100) has an attaching surface (200) attached to the surface of the glenoid cavity and a shell surface (300) for driving rotation, the guide plate (100) comprises a base body (1) and positioning blocks (2) arranged around the periphery of the base body (1), the positioning blocks (2) are at least three and protrude towards the attaching surface (200) to form an attaching area (20) for accommodating the glenoid cavity on the attaching surface (200), the positioning blocks (2) are provided with stop portions (21) towards the attaching area (20), the glenoid cavity is limited in the attaching area (20) by the stop portions (21), and one side of the shell surface (300) of the base body (1) has a positioning column (3) extending outward, the positioning column (3) penetrates the attaching area (20) and forms a first pinhole (30).
2. The reverse shoulder arthroplasty glenoid side guide of claim 1, wherein, In the vertical direction perpendicular to the horizontal plane, the cross-sectional width of the positioning block (2) gradually decreases.
3. The reverse shoulder arthroplasty glenoid side guide of claim 1, wherein, The guide plate (100) has a center line perpendicular to the horizontal plane, and the included angle between the positioning column (3) and the center line is between 10-30°.
4. The reverse shoulder arthroplasty glenoid side guide of claim 1, wherein, On the periphery of the base body (1), the guide plate (100) is also provided with a positioning portion (4), the positioning portion (4) penetrates and forms a second pinhole (40), and the second pinhole (40) is located outside the attaching area (20).
5. The reverse shoulder arthroplasty glenoid side guide of claim 4, wherein, The base body (1) is hollow and has ribs (5) connecting the positioning column (3) and the base body (1), the ribs (5) are at least three and are spaced apart and connected to the inner wall surface of the base body (1).
6. The reverse shoulder arthroplasty glenoid side guide of claim 5, wherein, One of the ribs (5) is arranged close to the positioning portion (4), the connecting line between the rib (5) and the positioning column (3) is defined as a first connecting line, the connecting line between the positioning portion (4) and the positioning column (3) is defined as a second connecting line, and the included angle between the first connecting line and the second connecting line is between 10°-15°.
7. The reverse shoulder arthroplasty glenoid side guide of claim 5, wherein, On the side surface of one of the ribs (5) towards the adjacent rib (5), the rib (5) is provided with a chamfer (50) at the connection with the positioning column (3) and / or the base body (1).
8. The reverse shoulder arthroplasty glenoid side guide of claim 4, wherein, In the horizontal direction, the straight line distance from the second pinhole (40) to the center of the base body (1) is greater than the straight line distance from the positioning block (2) to the center of the base body (1).
9. The reverse shoulder arthroplasty glenoid side guide of claim 4, wherein, The connecting line between the positioning portion (4) and the center of the base body (1) has an extension line, one side of the extension line has three positioning blocks (2), and the other side of the extension line has two positioning blocks (2).
10. The reverse shoulder arthroplasty glenoid side guide of claim 9, wherein, Each positioning block (2) is arranged irregularly on the opposite sides of the extension line.