CN209474772U - Spinal internal fixation system - Google Patents
Spinal internal fixation system Download PDFInfo
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- CN209474772U CN209474772U CN201821535426.7U CN201821535426U CN209474772U CN 209474772 U CN209474772 U CN 209474772U CN 201821535426 U CN201821535426 U CN 201821535426U CN 209474772 U CN209474772 U CN 209474772U
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- hole
- plate body
- skidding
- body installation
- screw
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Abstract
The utility model provides a kind of spinal internal fixation system, including screw, link block, and link block has plate body installation through-hole；Inserted with ring is adjusted in each plate body installation through-hole, multiple adjustment portion antiskid grooves are equipped on the lateral surface for adjusting ring, each anti-skidding protrusion of adjustment portion is equipped with the anti-skidding through slot of multiple adjustment portions；Multiple mounting portion antiskid grooves are equipped on the medial surface of plate body installation through-hole, each anti-skidding protrusion of mounting portion is equipped with the anti-skidding through slot of multiple mounting portions.Use the spinal internal fixation system of the utility model, even if it is different from the angle that plate body installation through-hole cooperates to adjust ring, cause the contact area for adjusting ring and plate body installation through-hole smaller, also the anti-skidding protrusion of mounting portion of the anti-skidding protrusion of adjustment portion and plate body installation through-hole that can guarantee to adjust ring can be stable be connected together, prevent from adjusting and occur loosening or occurs to take off between ring and plate body installation through-hole following closely phenomenon.
Description
Technical field
The utility model relates to the field of medical instrument technology, more particularly to a kind of spinal internal fixation system.
Background technique
The application of vertebral internal fixation has the history of last 100 years, and internal fixation is mainly applied metal screw, steel plate, marrow
The operation that knochenbruch is connected and fixed by face directly in or beyond knochenbruch of the objects such as interior needle, steel wire or bone plate is chiefly used in fracture and cuts
Reduction and osteotomy, to keep the reset at folding end.
Internal fixation may be summarized to be two steps: 1) planting nail, be implanted into the bone block at different centrums or both ends of fracturing
Screw is formed to hold and is anchored；2) attachment devices such as steel plate, stick or steel wire are mounted on screw by installs connector, by compressing,
Relative position is strutted or reverses between each anchor node to carry out the correction to bone structure, then lock each anchor node formed it is whole
Interior fixed structure.
For spinal internal fixation system, generally include link block and at least two screws, link block have can respectively with
The plate body installation through-hole of each screw fit, each screw is respectively and after the cooperation of each plate body installation through-hole, at least two screw axis institutes
Straight line antarafacial or intersection.Adjusting ring is provided in the plate body installation through-hole being anchored in structure, adjusting ring has internal screw thread, spiral shell
The head of nail has the external screw thread with screw-internal thread fit；The outside for adjusting ring has convex arc surface, and setting adjusts the plate body peace of ring
Dress through-hole has the concaved circular cambered surface cooperated with convex arc surface.Adjust ring can be connect with screw thread, and can with recessed circle
The plate body installation through-hole arc surface of cambered surface cooperates, and the angle that cambered surface cooperation cooperates adjusting ring with plate body installation through-hole is adjusted
Section then can suitably adjust the setting angle of the screw by adjusting ring and link block cooperation.But adjust ring and plate body installation
The angle of through-hole cooperation is different, adjusts ring and the contact area of plate body installation through-hole is also different, when adjusting ring and plate body installation are logical
When the contact area in hole is smaller, adjusts and be easy to happen loosening between ring and plate body installation through-hole or occur taking off nail phenomenon.
Utility model content
In view of the foregoing deficiencies of prior art, the utility model intends to solve the technical problem by providing a kind of backbones
Internal fixation system.
In order to achieve the above objects and other related objects, the utility model provides a kind of spinal internal fixation system, including spiral shell
Nail, the number at least two of the screw；It further include link block, the link block has and can match respectively with each screw
The plate body installation through-hole of conjunction, each screw is respectively and after each plate body installation through-hole cooperation, at least two screw axis
Straight line antarafacial or intersection where line；In the distal end implantation bone block of all screws；The inside of the plate body installation through-hole
With concaved circular cambered surface；In each plate body installation through-hole inserted with adjust ring, it is described adjust ring inside have with it is described
The corresponding convex arc surface of concaved circular cambered surface；The screw is inserted in the adjusting ring；Along the week of the lateral surface for adjusting ring
To, it is described adjust ring lateral surface on be equipped with multiple adjustment portion antiskid grooves, the two neighboring adjustment portion antiskid groove it
Between formed the anti-skidding protrusion of adjustment portion, each anti-skidding protrusion of adjustment portion be equipped with the anti-skidding through slot of multiple adjustment portions, all institutes
The anti-skidding through slot of adjustment portion is stated to set gradually along the axial direction for adjusting ring；Along the week of the medial surface of the plate body installation through-hole
To equipped with multiple mounting portion antiskid grooves on the medial surface of the plate body installation through-hole, the two neighboring mounting portion is anti-skidding
The anti-skidding protrusion of mounting portion is formed between groove, each anti-skidding protrusion of mounting portion is equipped with the anti-skidding through slot of multiple mounting portions, institute
The anti-skidding through slot of the mounting portion having is set gradually along the axial direction of the plate body installation through-hole.
Preferably, the adjustment portion of each anti-skidding through slot of adjustment portion two sides adjacent with the anti-skidding through slot of the adjustment portion is anti-
Sliding groove connection；The mounting portion of each anti-skidding through slot of mounting portion two sides adjacent with the anti-skidding through slot of the mounting portion is anti-skidding recessed
Slot connection.
Preferably, along the circumferential direction of the medial surface for adjusting ring, guiding rib is equipped in the inside for adjusting ring.
Preferably, the adjusting ring is equipped with notch, and the notch is connected to the inside for adjusting ring, the notch perforation
To the axial both ends for adjusting ring.
Preferably, the core diameter of thread of the screw, along the direction from the distal end of the screw to the proximal end of the screw
It is gradually increased.
Preferably, all screws include two kinds of screw, and the screw of one of type is locking nail piece,
Another type of screw is universal nail piece；The locking nail piece includes locking nail bar portion, and the proximal end of the locking nail bar portion is set
There is locking nail mounting groove；The universal nail piece includes universal nail bar portion, and the proximal end of the universal nail bar portion is equipped with universal ball end, institute
The one end far from the universal nail bar portion for stating universal ball end is equipped with universal nail mounting groove；Also pacify in each universal nail piece
Equipped with connection structure, each connection structure is equipped with installing port, and certain bit card part is set to the opening of the installing port
On, and the positioning fastener and the installing port surround one for the accommodating chamber of universal ball end merging；Each installation
Mouth is equipped with nail portion receiving hole, and nail portion receiving hole is passed through for the universal nail bar portion.
Preferably, the link block has the plane of at least two one-tenth predetermined angulars, at least one described locking nail piece pair
The plate body installation through-hole the answered plate body installation through-hole corresponding from universal nail piece described at least one is located at different institutes
It states in plane.
Further, the spinal internal fixation system is sacral fixation system.
As described above, the spinal internal fixation system of the utility model, has the advantages that
Since, inserted with ring is adjusted, screw, which is inserted in, to be adjusted in ring in each plate body installation through-hole；Pacify in each screw
When being attached to corresponding plate body installation through-hole, screw strut during extruding force so that adjust ring the anti-skidding through slot of adjustment portion with
The anti-skidding through slot contact of the mounting portion of plate body installation through-hole, then adjust the installation of the adjustment portion anti-skidding protrusion and plate body installation through-hole of ring
The anti-skidding protrusion in portion is capable of forming stable clamping structure.The structure of the spinal internal fixation system of the utility model is simple, even if adjusting
Section ring is different from the angle that plate body installation through-hole cooperates, and causes the contact area for adjusting ring and plate body installation through-hole smaller, also can
What enough the anti-skidding protrusion of adjustment portion of guarantee adjusting ring and the anti-skidding protrusion of mounting portion of plate body installation through-hole can be stable is connected to one
It rises, prevents occurring loosening or occurring de- nail phenomenon between adjusting ring and plate body installation through-hole.
Detailed description of the invention
Fig. 1 is shown as the structural schematic diagram of the spinal internal fixation system merging bone block of the present embodiment.
Fig. 2 is shown as the structural schematic diagram of the spinal internal fixation system of the present embodiment.
Fig. 3 is shown as the structural schematic diagram of the universal nail piece of the spinal internal fixation system of the present embodiment.
Fig. 4 is shown as the structural representation that the universal nail bar portion of the spinal internal fixation system of the present embodiment is connect with universal ball end
Figure.
Fig. 5 is shown as the structural schematic diagram of the connection structure of the spinal internal fixation system of the present embodiment.
Fig. 6 is shown as the structural schematic diagram of the positioning fastener of the spinal internal fixation system of the present embodiment.
Fig. 7 is shown as the structural schematic diagram of the locking nail piece of the spinal internal fixation system of the present embodiment.
Fig. 8 is shown as the structural schematic diagram of the link block of the spinal internal fixation system of the present embodiment.
Fig. 9 is shown as the enlarged structure schematic diagram at the A of Fig. 8.
Figure 10 is shown as the structural schematic diagram of the adjusting ring of the spinal internal fixation system of the present embodiment.
Drawing reference numeral explanation
10 bone blocks
100 screws
The distal end of 101 screws
The proximal end of 102 screws
110 locking nail pieces
111 locking nail bar portions
112 locking nail mounting grooves
120 universal nail pieces
121 universal nail bar portions
122 universal ball ends
1221 holding grooves
123 universal nail mounting grooves
124 connection structures
1241 installing ports
1242 nail portion receiving holes
1243 positioning fasteners
1244 recess portions
200 link blocks
210 plate body installation through-holes
212 mounting portion antiskid grooves
The anti-skidding protrusion of 213 mounting portions
The anti-skidding through slot of 214 mounting portions
300 adjust ring
320 adjustment portion antiskid grooves
The anti-skidding protrusion of 330 adjustment portions
The anti-skidding through slot of 340 adjustment portions
350 guiding ribs
360 notches
Specific embodiment
The embodiments of the present invention is illustrated by particular specific embodiment below, those skilled in the art can be by this
Content disclosed by specification understands other advantages and effect of the utility model easily.
Please refer to attached drawing.It should be clear that this specification structure depicted in this specification institute accompanying drawings, ratio, size etc., only to cooperate
The revealed content of specification, so that those skilled in the art understands and reads, being not intended to limit the utility model can be real
The qualifications applied, therefore do not have technical essential meaning, the tune of the modification of any structure, the change of proportionate relationship or size
It is whole, in the case where not influencing the effect of the utility model can be generated and the purpose that can reach, it should all still fall in the utility model institute
The technology contents of announcement obtain in the range of capable of covering.Meanwhile in this specification it is cited as "upper", "lower", "left", "right",
The term of " centre ", " distal end ", " proximal end " and " one " etc. is merely convenient to being illustrated for narration, rather than practical new to limit this
The enforceable range of type, relativeness are altered or modified, under the content of no substantial changes in technology, practical new when being also considered as this
The enforceable scope of type.
As shown in Figures 1 to 10, the spinal internal fixation system of the present embodiment: including screw 100, the number of screw 100 is extremely
It is less two；It further include link block 200, link block 200 has plate body installation through-hole that can respectively with the cooperation of each screw 100
210, the straight line antarafacial after each screw 100 cooperates with each plate body installation through-hole 210 respectively, where at least two screws, 100 axis
Or intersection；In the distal end implantation bone block 10 of all screws 100；
The inside of plate body installation through-hole 210 has concaved circular cambered surface；
Inserted with ring 300 is adjusted in each plate body installation through-hole 210, the inside of adjusting ring 300 has and concaved circular cambered surface
Corresponding convex arc surface；Screw 100, which is inserted in, to be adjusted in ring 300；
Along the circumferential direction for the lateral surface for adjusting ring 300, it is anti-skidding recessed that multiple adjustment portions are equipped on the lateral surface for adjusting ring 300
Slot 320 forms the anti-skidding protrusion 330 of adjustment portion, each anti-skidding protrusion of adjustment portion between two neighboring adjustment portion antiskid groove 320
330 be equipped with the anti-skidding through slot 340 of multiple adjustment portions, the anti-skidding through slot 340 of all adjustment portions along adjust ring 300 axial direction successively
Setting；
Along the circumferential direction of the medial surface of plate body installation through-hole 210, it is equipped on the medial surface of plate body installation through-hole 210 multiple
Mounting portion antiskid groove 212 forms the anti-skidding protrusion 213 of mounting portion, each installation between two neighboring mounting portion antiskid groove 212
The anti-skidding protrusion 213 in portion is equipped with the anti-skidding through slot 214 of multiple mounting portions, and the anti-skidding through slot 214 of all mounting portions is installed along plate body
The axial direction of through-hole 210 is set gradually.
Since the inside of plate body installation through-hole 210 has and concaved circular cambered surface phase with concaved circular cambered surface, the inside for adjusting ring 300
The convex arc surface answered；When screw 100 is installed in plate body installation through-hole 210, lead to by adjusting ring 300 is adjusted with plate body installation
Relative angle between hole 210 can be realized the adjusting of the angle of screw 100, enable screw 100 fixation position more
It is more；
Since, inserted with ring 300 is adjusted, screw 100, which is inserted in, to be adjusted in ring 300 in each plate body installation through-hole 210；
When each screw 100 is installed to corresponding plate body installation through-hole 210, screw 100 strut during extruding force so that adjust
The anti-skidding through slot 340 of the adjustment portion of ring 300 is contacted with the anti-skidding through slot 214 of the mounting portion of plate body installation through-hole 210, then adjusts ring 300
The anti-skidding protrusion of adjustment portion 330 and the anti-skidding protrusion 213 of mounting portion of plate body installation through-hole 210 be capable of forming stable clamping knot
Structure；The structure of the spinal internal fixation system of the utility model is simple；Even if adjusting what ring 300 cooperated with plate body installation through-hole 210
Angle is different, causes to adjust ring 300 and the contact area of plate body installation through-hole 210 is smaller, can also guarantee the tune for adjusting ring 300
The anti-skidding protrusion 330 in section portion and the anti-skidding protrusion 213 of mounting portion of plate body installation through-hole 210 can be stable be connected together, prevent
It adjusts and occurs loosening or occurring de- nail phenomenon between ring 300 and plate body installation through-hole 210.
It is to contact in the circumferential due to adjusting ring 300 with plate body installation through-hole 210, the anti-skidding through slot 340 of all adjustment portions
Along adjust ring 300 axial direction set gradually, the anti-skidding through slot 214 of all mounting portions along plate body installation through-hole 210 axial direction
It sets gradually, so that adjusting ring 300 and the connection of plate body installation through-hole 210 are more stable.
The adjustment portion antiskid groove 320 of each anti-skidding through slot 340 of adjustment portion two sides adjacent with the anti-skidding through slot 340 of the adjustment portion
Connection；The mounting portion antiskid groove 212 of each anti-skidding through slot 214 of mounting portion two sides adjacent with the anti-skidding through slot 214 of the mounting portion connects
It is logical.The structure is mutually inserted the anti-skidding through slot 214 of mounting portion and the anti-skidding through slot 340 of adjustment portion, facilitates the anti-skidding protrusion of adjustment portion
330 form clamping structure with the anti-skidding protrusion 213 of mounting portion.
Along the circumferential direction for the medial surface for adjusting ring 300, guiding rib 350 is equipped in the inside for adjusting ring 300.Guiding rib 350
Setting convenient for screw 100 screw in adjust ring 300 in.
Ring 300 is adjusted equipped with notch 360, the connection of notch 360 adjusts the inside of ring 300, the perforation of notch 360 to adjusting ring
300 axial both ends.The setting of notch 360 is so that adjusting the stretching, extension of ring 300 can not be limited；The structure enables to adjust
Section ring 300 can be adjusted relative to plate body installation through-hole 210 for greater flexibility, and screw 100 is screwed in and is adjusted in ring 300
Afterwards, adjusting ring 300 can more stably contact with plate body installation through-hole 210.
The core diameter of thread of screw 100 is gradually increased along the direction from the distal end of screw 100 to the proximal end of screw 100.It should
Structure can strut convenient for adjusting ring 300.
All screws 100 include two kinds of screw 100, and the screw 100 of one of type is locking nail piece
110, another type of screw 100 is universal nail piece 120；
Locking nail piece 110 includes locking nail bar portion 111, and the proximal end of locking nail bar portion 111 is equipped with locking nail mounting groove 112；
Universal nail piece 120 includes universal nail bar portion 121, and the proximal end of universal nail bar portion 121 is equipped with universal ball end 122, universal
One end of the separate universal nail bar portion 121 of bulb 122 is equipped with universal nail mounting groove 123；It is also installed in each universal nail piece 120
There is connection structure 124, each connection structure 124 is equipped with installing port 1241, and certain bit card part 1243 is set to installing port 1241
Opening on, and position fastener 1243 and the installing port 1241 and surround an accommodating chamber being placed in for universal ball end 122, ten thousand
It can be rotated in the accommodating chamber to bulb 122；Each installing port 1241 is equipped with nail portion receiving hole 1242, nail portion receiving hole
1242 pass through for universal nail bar portion 121.Universal ball end 122 can rotate in accommodating chamber, can be realized universal nail piece 120 with connect
The adjusting of angle between structure 124.Universal nail mounting groove 123 is protruded into for screwdriver, and locking nail mounting groove 112 is stretched for screwdriver
Enter.Universal nail bar portion 121, positioning fastener 1243 and connection structure 124 are mounted in together.
One end of the separate universal nail bar portion 121 of universal ball end 122 is equipped with holding groove 1221, positions the interior of fastener 1243
Side is equipped with recess portion 1244 corresponding with holding groove 1221.In the present embodiment, holding groove 1221 includes multiple groove bodies, all
Along close to 121 direction of universal nail bar portion, depth is sequentially reduced groove body.The structure makes universal nail piece 120 in rotation, universal
Bulb 122 is contacted with recess portion 1244, then after universal 120 angle of nail piece is adjusted, holding groove 1221 can snap into recess portion 1244,
This is a kind of by improving frictional force, the structure of the stability contacted between Lai Tigao universal ball end 122 and positioning fastener 1243.
Link block 200 has the plane of at least two one-tenth predetermined angulars, at least one the locking corresponding plate body of nail piece 110 peace
Dress through-hole 210 is located in different planes from least one corresponding plate body installation through-hole 210 of universal nail piece 120.The structure energy
The resisting pull out forces of enough enhancing locking nail piece 110 and universal nail piece 120, to increase the stability of system.
In the present embodiment, spinal internal fixation system is sacral fixation system.
To sum up, the utility model effectively overcomes various shortcoming in the prior art and has high industrial utilization value.
The above embodiments are only illustrative of the principle and efficacy of the utility model, and not for limitation, this is practical new
Type.Any person skilled in the art can all carry out above-described embodiment under the spirit and scope without prejudice to the utility model
Modifications and changes.Therefore, such as those of ordinary skill in the art without departing from the revealed essence of the utility model
All equivalent modifications or change completed under mind and technical idea, should be covered by the claim of the utility model.
Claims (8)
1. a kind of spinal internal fixation system, including screw (100), the number at least two of the screw (100)；It further include connecting
It connects block (200), the link block (200) has plate body installation through-hole that can respectively with each screw (100) cooperation
(210), each screw (100) is respectively and after each plate body installation through-hole (210) cooperation, at least two screws
(100) the straight line antarafacial where axis or intersection；In distal end (101) implantation bone block (10) of all screws (100)；Its
It is characterized in that:
The inside of the plate body installation through-hole (210) has concaved circular cambered surface；
Inserted with ring (300) are adjusted in each plate body installation through-hole (210), the inside for adjusting ring (300) has
Convex arc surface corresponding with the concaved circular cambered surface；The screw (100) is inserted in the adjusting ring (300)；
Along the circumferential direction of the lateral surface for adjusting ring (300), multiple adjustings are equipped on the lateral surface for adjusting ring (300)
Portion's antiskid groove (320) forms the anti-skidding protrusion of adjustment portion (330) between the two neighboring adjustment portion antiskid groove (320), often
A anti-skidding protrusion of the adjustment portion (330) is equipped with the anti-skidding through slot of multiple adjustment portions (340), all anti-slide-throughs of the adjustment portion
Slot (340) is set gradually along the axial direction for adjusting ring (300)；
Along the circumferential direction of the medial surface of the plate body installation through-hole (210), on the medial surface of the plate body installation through-hole (210)
It is anti-skidding that mounting portion is formed equipped with multiple mounting portion antiskid grooves (212), between the two neighboring mounting portion antiskid groove (212)
Protrusion (213), each anti-skidding protrusion of mounting portion (213) are equipped with the anti-skidding through slot of multiple mounting portions (214), and all is described
The anti-skidding through slot of mounting portion (214) is set gradually along the axial direction of the plate body installation through-hole (210).
2. spinal internal fixation system according to claim 1, it is characterised in that:
The adjustment portion of each anti-skidding through slot of the adjustment portion (340) and the adjacent two sides of the anti-skidding through slot of the adjustment portion (340) is anti-
Sliding groove (320) connection；
The mounting portion of each anti-skidding through slot of the mounting portion (214) and the adjacent two sides of the anti-skidding through slot of the mounting portion (214) is anti-
Sliding groove (212) connection.
3. spinal internal fixation system according to claim 1, it is characterised in that: along the inside for adjusting ring (300)
The circumferential direction in face is equipped with guiding rib (350) in the inside for adjusting ring (300).
4. spinal internal fixation system according to claim 1, it is characterised in that: the adjusting ring (300) is equipped with notch
(360), notch (360) the connection inside for adjusting ring (300), notch (360) perforation to the adjusting ring
(300) axial both ends.
5. spinal internal fixation system according to claim 1, it is characterised in that:
The core diameter of thread of the screw (100), along the close of the distal end (101) from the screw (100) to the screw (100)
The direction at end (102) is gradually increased.
6. spinal internal fixation system according to claim 1, it is characterised in that:
All screws (100) include two kinds of screw (100), and the screw (100) of one of type is locking
Nail piece (110), another type of screw (100) are universal nail piece (120)；
The locking nail piece (110) includes locking nail bar portion (111), and the proximal end of the locking nail bar portion (111) is equipped with locking nail
Mounting groove (112)；
The universal nail piece (120) includes universal nail bar portion (121), and the proximal end of the universal nail bar portion (121) is equipped with multi-directional ball
One end far from the universal nail bar portion (121) of head (122), the universal ball end (122) is equipped with universal nail mounting groove
(123)；It is also equipped with connection structure (124) on each universal nail piece (120), is set on each connection structure (124)
Have installing port (1241), certain bit card part (1243) is set in the opening of the installing port (1241), and the positioning card
Part (1243) and the installing port (1241) surround one for the accommodating chamber of the universal ball end (122) merging；Each peace
It fills mouth (1241) and is equipped with nail portion receiving hole (1242), nail portion receiving hole (1242) is worn for the universal nail bar portion (121)
It crosses.
7. spinal internal fixation system according to claim 6, it is characterised in that: the link block (200) has at least two
A plane at predetermined angular, the corresponding plate body installation through-hole (210) of at least one described locking nail piece (110) at least
The corresponding plate body installation through-hole (210) of one universal nail piece (120) is located in the different planes.
8. spinal internal fixation system according to claim 6 or 7, it is characterised in that: the spinal internal fixation system is sacrum
Bone fixation system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535426.7U CN209474772U (en) | 2018-09-19 | 2018-09-19 | Spinal internal fixation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821535426.7U CN209474772U (en) | 2018-09-19 | 2018-09-19 | Spinal internal fixation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209474772U true CN209474772U (en) | 2019-10-11 |
Family
ID=68113619
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821535426.7U Active CN209474772U (en) | 2018-09-19 | 2018-09-19 | Spinal internal fixation system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209474772U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115844508A (en) * | 2023-02-22 | 2023-03-28 | 首都医科大学附属北京同仁医院 | Anatomical locking steel plate for minimally invasive treatment of humeral fracture |
-
2018
- 2018-09-19 CN CN201821535426.7U patent/CN209474772U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115844508A (en) * | 2023-02-22 | 2023-03-28 | 首都医科大学附属北京同仁医院 | Anatomical locking steel plate for minimally invasive treatment of humeral fracture |
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