CN212521976U - Sacrum screw fixing structure - Google Patents
Sacrum screw fixing structure Download PDFInfo
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- CN212521976U CN212521976U CN202021727455.0U CN202021727455U CN212521976U CN 212521976 U CN212521976 U CN 212521976U CN 202021727455 U CN202021727455 U CN 202021727455U CN 212521976 U CN212521976 U CN 212521976U
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Abstract
The utility model discloses a sacrum screw fixation structure belongs to orthopedic implant technical field, sacrum screw fixation structure includes screw seat, main screw and titanium stick, is equipped with the reinforcing plate of horizontal extension on the screw seat, is equipped with universal locking hole on the reinforcing plate, is equipped with supplementary nail in the universal locking hole, and main screw and supplementary nail are sacrum nail and crisscross setting. The utility model discloses a set up the reinforcing plate of horizontal extension and additionally fix with the help of supplementary nail for whole fixed knot constructs difficult not hard up and deviate from at the operation in-process, has solved the problem that single sacrum screw of prior art controlled power weak point, and the utility model discloses well supplementary nail can be dismantled, and the security is high, convenient operation.
Description
Technical Field
The utility model relates to an orthopedic implant technical field especially indicates a sacrum screw fixed knot constructs.
Background
Lumbosacral segment spinal fusion has been a challenging area in spinal surgery. The local complex anatomy, unique biomechanical properties, and poor bone quality of the sacrum are all responsible for the difficulty of fusing the lumbosacral segment spine.
At present, in a sacrum fracture fixation operation, sacrum fixation is usually performed by only one screw, and for patients with osteoporosis, the holding force of a single screw is weak, so that the problem of insufficient screw firmness exists. Accordingly, there is a need to provide a fixation structure that is suitable for the sacral region and that provides enhanced fixation strength.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a sacrum screw fixation structure, it is applicable to the sacrum region, can strengthen fixed intensity.
In order to solve the technical problem, the utility model provides a technical scheme as follows:
a sacral screw fixation structure comprising a screw seat, a main screw, and a titanium rod, wherein:
the screw seat is provided with an axial through hole, the lower end of the axial through hole is closed, the main screw comprises a screw body and a head part, the circumferential dimension of the head part is larger than that of the screw body, the screw body of the main screw penetrates through the axial through hole of the screw seat, and the head part of the main screw is blocked by the closed end at the lower end of the screw seat so as to avoid the main screw from falling off from the lower end of the screw seat;
a pair of openings are formed in the side wall of the screw base, so that a U-shaped groove is formed at the upper end of the screw base, internal threads are formed in the two side walls of the U-shaped groove, the titanium rod and the plug screw which is matched with the internal threads to tightly press the titanium rod and the main screw in the screw base are sequentially arranged above the head of the main screw in the U-shaped groove;
be equipped with the reinforcing plate of horizontal extension on the screw seat, be equipped with universal locking hole on the reinforcing plate, the downthehole supplementary nail that is equipped with of universal locking, main screw and supplementary nail are sacral nail and crisscross setting.
Furthermore, the reinforcing plate is provided with a pair of holding arms which are used for being connected and matched with the screw seat, one opposite sides of the two holding arms are symmetrically provided with grooves, the symmetrically arranged grooves are surrounded into insertion holes for inserting the side walls of the U-shaped groove, one opposite sides of the two holding arms are also symmetrically provided with protrusions extending into the U-shaped groove, the upper end surfaces of the protrusions form compression matching surfaces which are matched with the screw plugs to fixedly press the reinforcing plate in the screw seat, and the side surfaces of the protrusions are blocking screw matching surfaces which are matched with the side walls of the U-shaped groove to prevent the reinforcing plate from being separated from the side surfaces of the screw seat;
the pair of embracing arms are of deformable structures, and a moving gap is formed between the pair of embracing arms, so that the pair of embracing arms can be clamped and moved by an instrument to clasp and fix the screw seat after being inserted into the screw seat.
Furthermore, the reinforcing plate is Z-shaped and comprises an upper transverse plate, a vertical plate and a lower transverse plate, the arm is arranged on the upper transverse plate, the universal locking hole is formed in the lower transverse plate, the upper transverse plate is located above the titanium rod, the upper end face of the protrusion arranged on the arm is directly in compression fit with the screw plug, and the lower end face of the protrusion is in compression fit with the titanium rod.
Furthermore, the lower end face of the bulge is of an arc structure matched with the cylindrical surface of the titanium rod.
Furthermore, a pair of first instrument clamping grooves is formed in the outer side wall of the U-shaped groove, and a buckle matched with the first instrument clamping grooves is arranged on one surface, facing the U-shaped groove, of a vertical plate of the reinforcing plate;
and/or, be equipped with a pair of second apparatus centre gripping recess on the terminal surface around the lateral wall in U-shaped groove, what the reinforcing plate was embraced is equipped with on the arm with second apparatus centre gripping recess matched with sand grip, it is deformable structure to embrace the arm, it installs to embrace the arm after on the U-shaped groove by the apparatus centre gripping deformation messenger the sand grip gets into thereby second apparatus centre gripping recess with the U-shaped groove is firmly fixed.
Furthermore, the embracing arm is tightly embraced and matched with one side wall of a U-shaped groove on the screw seat, a pair of grooves for inserting one side wall of the U-shaped groove are arranged on the pair of embracing arms, and the tail end of the embracing arm is provided with the bulge;
or the holding arm is tightly held and matched with two side walls of a U-shaped groove on the screw seat, two pairs of grooves for inserting the two side walls of the U-shaped groove are formed in the pair of holding arms, and the protrusion is arranged in the middle of the holding arm.
Furthermore, the reinforcing plate is Z-shaped, a transverse plate at one side of the reinforcing plate is provided with a lower opening which is buckled at the top of the screw seat, and a through hole is formed in the lower opening;
the screw plug comprises a first threaded section positioned at the lower part and a second threaded section positioned at the upper part, the first threaded section is used for being in threaded connection with two side walls of the U-shaped groove, the outer diameter of the second threaded section is smaller than that of the first threaded section, and the second threaded section is used for penetrating through the through hole in the reinforcing plate and fixing the reinforcing plate on the screw seat through a fixing nut;
the outer side wall of the U-shaped groove is provided with a pair of instrument clamping grooves, and the middle vertical plate of the reinforcing plate faces towards one side of the U-shaped groove and is provided with a buckle matched with the instrument clamping grooves.
Furthermore, a pair of instrument clamping grooves is formed in the outer side wall of the U-shaped groove;
the reinforcing plate is Z-shaped, be equipped with on one side diaphragm of reinforcing plate and be used for detaining the under shed of establishing at screw seat top, the edge of under shed is equipped with the first buckle with one side apparatus centre gripping recess matched with, the middle part riser of reinforcing plate is in the orientation be equipped with in the one side in U-shaped groove with opposite side apparatus centre gripping recess matched with second buckle, the reinforcing plate passes through first buckle and second buckle are detained and are established the joint and be in on the screw seat.
Furthermore, the universal locking holes are formed in the transverse plate on the other side of the reinforcing plate, the number of the universal locking holes is two, and the auxiliary nails in the universal locking holes are symmetrically distributed along the axis.
Furthermore, the reinforcing plate is a horizontal plate, one end of the reinforcing plate and the bottom of the screw seat are of an integral structure, the other end of the reinforcing plate is also provided with the screw seat, the main screw and the titanium rod, and two ends of the reinforcing plate are of the same structural form.
The utility model discloses following beneficial effect has:
the utility model discloses a sacrum screw fixed knot constructs through the reinforcing plate that sets up horizontal extension and additionally fixes with the help of supplementary nail for whole fixed knot constructs difficult not hard up and deviate from at the operation in-process, has solved the problem that single sacrum screw of prior art controlled power weak point, and the utility model discloses well supplementary nail can be dismantled, and the security is high, convenient operation.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a sacral screw fixation structure of the present invention, wherein (a) is a cross-sectional view and (b) is a perspective view;
fig. 2 is a schematic structural view of another embodiment of a sacral screw fixation structure of the present invention, wherein (a) is a cross-sectional view and (b) is a perspective view and shows a reinforcing plate alone;
fig. 3 is a schematic structural view of a further embodiment of the sacral screw fixation structure of the present invention, wherein (a) is a cross-sectional view and (b) is a perspective view;
fig. 4 is a schematic structural view of another embodiment of the sacral screw fixation structure of the present invention, wherein (a) is a perspective view and (b) is a view of the sacral screw fixation structure of the present invention with the auxiliary screw removed;
fig. 5 is a schematic view of a sacral screw fixation structure according to yet another embodiment of the present invention, wherein (a) is a cross-sectional view and (b) is a perspective view;
fig. 6 is a schematic structural view of another embodiment of the sacral screw fixation structure of the present invention, wherein (a) is a cross-sectional view and (b) is a perspective view.
Detailed Description
In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following detailed description will be given with reference to the accompanying drawings and specific embodiments.
The utility model provides a sacrum screw fixed knot constructs, as shown in fig. 1-6, including screw base 1, main screw 2 and titanium stick 3, wherein:
the screw seat 1 is provided with an axial through hole, the lower end of the axial through hole is closed, the main screw 2 comprises a screw body and a head part, the circumferential dimension of the head part is larger than that of the screw body, the screw body of the main screw 2 penetrates through the axial through hole of the screw seat 1, and the head part of the main screw 2 is blocked by the closed end at the lower end of the screw seat 1 so as to prevent the main screw 2 from being separated from the lower end of the screw seat 1; in specific implementation, the screw seat 1 can be a universal screw seat, the main screw 2 can be a universal ball nail, the universal ball nail can comprise a solid nail and a hollow nail, and the hollow nail is divided into a hole containing injectable cement and a hole not containing injectable cement;
a pair of openings are arranged on the side wall of the screw seat 1, so that a U-shaped groove for placing a titanium rod 3 is formed at the upper end of the screw seat 1, internal threads are arranged on the two side walls of the U-shaped groove, the titanium rod 3 and screw plugs 5 and 5' (also called screw thread pressing nails) matched with the internal threads to press the titanium rod 3 and the main screw 2 in the screw seat 1 are sequentially arranged above the head of the main screw 2 in the U-shaped groove; in order to improve the fixing firmness of the main screw 2, a nail pressing gasket 4 can be arranged between the head of the main screw 2 and the titanium rod 3 in the U-shaped groove;
be equipped with the reinforcing plate 6, 6 ', 6 ", 6'" of horizontal extension on the screw seat 1, be equipped with universal locking hole 7 (spherical hole) on the reinforcing plate 6, 6 ', 6 ", 6'", be equipped with supplementary nail 8 in the universal locking hole 7, main screw 2 and supplementary nail 8 are sacral nail and crisscross setting (be non-parallel arrangement promptly) to improve fixed intensity.
The utility model discloses a sacrum screw fixed knot constructs is applied to the internal fixation of backbone, is particularly useful for the fixed operation of sacrum, and its key feature is two screws, can dismantle, particularly, through setting up the reinforcing plate of horizontal extension and additionally fix with the help of supplementary nail for whole fixed knot constructs difficult not hard up and deviate from at the operation in-process, has solved the single sacrum screw of prior art and has controlled the problem that power is weak, and the utility model discloses well supplementary nail can be dismantled, and the security is high, convenient operation.
According to the different structures and the installation form of reinforcing plate, the utility model discloses specifically can have following embodiment.
Example 1
As shown in fig. 1, the reinforcing plate 6 is Z-shaped, and a lateral cross plate (left side of the illustrated embodiment) of the reinforcing plate 6 is provided with a lower opening 61 for being buckled at the top of the screw seat 1, and for convenience of installation, the size of the lower opening 61 may be slightly larger than the width of two side walls of the screw seat 1; a through hole 62 is arranged in the lower opening 61 to be matched with the screw plug 5; the universal locking holes 7 are positioned on the transverse plate on the other side of the reinforcing plate 6 and are one in number;
the screw plug 5 comprises a first screw thread section 51 at the lower part and a second screw thread section 52 at the upper part, the first screw thread section 51 is used for being connected with two side walls of the U-shaped groove in a threaded mode, and the second screw thread section 52 is used for penetrating through a through hole 62 on the reinforcing plate 6 and fixing the reinforcing plate 6 on the screw base 1 through a fixing nut 9.
In the embodiment, the reinforcing plate 6 is Z-shaped, so that the cutting traces at the auxiliary nails 8 can be greatly reduced; the reinforcing plate 6 is firstly buckled on the screw seat 1 and then is pressed and fixed through the fixing nut 9, and the fixing mode is firm and reliable.
The outer diameter of the second thread segments 52 is preferably smaller than the outer diameter of the first thread segments 51, so that a smaller fixing nut 9 can be used, the construction volume is reduced, and the tissue irritation is reduced. Further, can be equipped with a pair of apparatus centre gripping recess 11 on the lateral wall in U-shaped groove, the middle part riser of reinforcing plate 6 can be equipped with on the one side towards the U-shaped groove with apparatus centre gripping recess 11 matched with buckle (not shown), like this when reinforcing plate 6 detains and establishes this buckle can play joint fixed action on universal screw seat 1 back, later rethread fixation nut 9 is fixed for the monolithic stationary effect is more firm.
Example 2
Example 2 is not shown, and fig. 1 can be appropriately referred to. In this embodiment, a pair of instrument clamping grooves 11 are formed on the outer side wall of the U-shaped groove; the reinforcing plate 6 is Z-shaped, a transverse plate at one side of the reinforcing plate 6 is provided with a lower opening 61 used for buckling at the top of the screw seat 1, the edge of the lower opening 61 is provided with a first buckle (not shown, and can be various common raised structures in the field, such as barbs in particular) matched with the instrument clamping groove 11 at one side, a vertical plate at the middle part of the reinforcing plate 6 is provided with a second buckle (not shown, and can be various common raised structures in the field) matched with the instrument clamping groove 11 at the other side on one side facing the U-shaped groove, the reinforcing plate 6 is buckled and buckled on the screw seat 1 through the first buckle and the second buckle, and thus, the reinforcing plate 6 is fixed on the screw seat 1 through bilateral clamping without being fixed through a fixing nut 9, the fixing is simple, convenient and firm; the plug screw can now be the conventional plug screw 5' of fig. 5 or 6.
Example 3
This embodiment is shown in fig. 2, which is substantially the same as the structure of embodiment 1 shown in fig. 1, except that the number of the universal locking holes 7 is two, and the auxiliary nails 8 in the universal locking holes 7 are symmetrically distributed along the axis, thereby forming a detachable three-screw sacral nail structure.
Example 4
In this embodiment, as shown in fig. 3, a pair of holding arms 61 ' for connecting and matching with the screw seat 1 is provided on the reinforcing plate 6 ', grooves are symmetrically provided on opposite sides of the two holding arms 61 ', the symmetrically provided grooves enclose an insertion hole 62 ' for inserting a side wall of the U-shaped groove, and for convenience of installation, the size of the insertion hole 62 ' may be slightly larger than that of the side wall of the U-shaped groove; the opposite sides of the two holding arms 61 'are symmetrically provided with protrusions 63' extending into the U-shaped groove, the upper end surfaces of the protrusions 63 'form pressing and matching surfaces which are matched with the screw plug 5' to press and fix the reinforcing plate 6 'in the screw seat 1, and the side surfaces of the protrusions 63' are blocking and matching surfaces which are matched with the side walls of the U-shaped groove to prevent the reinforcing plate from being pulled out from the side surfaces of the screw seat 1;
the holding arms 61' are deformable and have a moving gap therebetween, so that the screw base 1 can be held and fixed by the clamping movement of the instrument after being inserted into the screw base 1.
Further, reinforcing plate 6 'can be the Z shape, including last diaphragm, riser and lower diaphragm, embraces arm 61' and sets up on the last diaphragm, universal locking hole 7 sets up just quantity is one on the diaphragm down, go up the diaphragm and be located the top of titanium stick 3, embrace the upper end face of the protruding 63 'that sets up on arm 61' and directly compress tightly the cooperation with plug screw 5 ', the lower terminal surface and the titanium stick 3 of protruding 63' compress tightly the cooperation.
It can be understood that the insertion hole 62 ' in the arm 61 ' is open-hole and non-closed, and the arm is set to be deformable, so that the insertion hole 62 ' can be designed to be larger than the side wall of the U-shaped groove, which is convenient for installation, and can be fixed by front and back clamping after installation without affecting the installation stability. To ensure the fixing firmness of the titanium rod 3, the lower end surface of the bulge 63' is preferably in an arc-shaped structure matched with the cylindrical surface of the titanium rod 3.
In this embodiment, the reinforcing plate 6 'is sleeved on one side wall of the U-shaped groove of the screw seat 1, and the portion of the reinforcing plate 6' located in the screw seat 1 is compressed and fixed by the plug screw, so that the vertical height of the screw seat 1 is greatly reduced, and the height of the cutting trace of the whole fixing structure is reduced, compared with embodiment 1. In addition, the left end (namely the side of the bulge 63 ') of the reinforcing plate 6' is pressed above the titanium rod 3, so that the vertical height of the titanium rod 3 can be reduced, and therefore, when the fixing structure is used, the titanium rod 3 can be tightly attached to the surface of a human bone, the external protruding height of the fixing structure after installation is reduced, and the influence of the fixing structure after implantation on other parts of the human body is reduced. The left end of the reinforcing plate 6' is arranged and combined with the overall Z-shaped structural design, and the vertical height of the titanium rod and the height of the auxiliary nail cutting trace on the right side are reduced.
In this embodiment, a pair of first device clamping grooves 11 ' may be formed on the outer side wall of the U-shaped groove, and a buckle (not shown) which is matched with the first device clamping groove 11 ' is formed on one surface of the vertical plate of the reinforcing plate 6 ' facing the U-shaped groove to perform a clamping fixing function;
and/or a pair of second instrument clamping grooves 12 ' are formed in the front end face and the rear end face of the outer side wall of the U-shaped groove, protruding strips (not shown) matched with the second instrument clamping grooves 12 ' are arranged on the holding arms 61 ' of the reinforcing plate 6 ', the holding arms 61 ' are of deformable structures, and after the holding arms 61 ' are installed on the U-shaped groove, the holding arms are clamped by an instrument to deform, so that the protruding strips enter the second instrument clamping grooves 12 ' and are fixedly connected with the U-shaped groove.
In the embodiment shown in fig. 3, the holding arm 61 'is tightly fitted with one side wall of the U-shaped groove of the screw seat 1, the pair of holding arms 61' is provided with a pair of grooves into which one side wall of the U-shaped groove is inserted, and the end of the holding arm 61 'is provided with the protrusion 63'; it will be appreciated that there is a clear variation, namely: embrace two lateral walls in arm and the last U-shaped groove of screw seat and embrace the cooperation tightly, should be to embracing the arm and being equipped with two lateral wall male two pairs of recesses that supply the U-shaped groove, embrace the middle part setting of arm protruding, the reinforcing plate can play better fixed action equally under this kind of structural change mode.
Example 5
This embodiment is shown in fig. 4, which is substantially the same as the structure of embodiment 4 shown in fig. 3, except that the number of the gimbaled locking holes 7 is two, and the auxiliary nails 8 in the gimbaled locking holes 7 are symmetrically distributed along the axis, thereby forming a detachable three-screw sacral nail structure.
Example 6
In this embodiment, as shown in fig. 5, the reinforcing plate 6 "is a horizontal plate, and one end of the reinforcing plate 6" and the bottom of the screw seat 1 are integrated.
Example 7
This embodiment is shown in fig. 6, and has substantially the same structure as embodiment 6 shown in fig. 5, except that the other end of the reinforcing plate 6 ' ″ is also provided with a screw seat 1 ', a main screw 2 ', a titanium rod 3 ', a nail pressing washer, a screw plug, and the like, and both ends of the reinforcing plate 6 ' ″ have the same structural form. The auxiliary screw is now the main screw 2'.
Two screws of the structure are main screws, and the direction of the screws can be determined according to actual conditions in the operation process. This configuration can be used when it is desired to connect dual rods. The reinforcing plate 6' between the double screw seats and the double screw seats are both in a fixed connection/integrated structure.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. A sacral screw fixing structure comprises a screw seat, a main screw and a titanium rod, and is characterized in that,
the screw seat is provided with an axial through hole, the lower end of the axial through hole is closed, the main screw comprises a screw body and a head part, the circumferential dimension of the head part is larger than that of the screw body, the screw body of the main screw penetrates through the axial through hole of the screw seat, and the head part of the main screw is blocked by the closed end at the lower end of the screw seat so as to avoid the main screw from falling off from the lower end of the screw seat;
a pair of openings are formed in the side wall of the screw base, so that a U-shaped groove is formed at the upper end of the screw base, internal threads are formed in the two side walls of the U-shaped groove, the titanium rod and the plug screw which is matched with the internal threads to tightly press the titanium rod and the main screw in the screw base are sequentially arranged above the head of the main screw in the U-shaped groove;
be equipped with the reinforcing plate of horizontal extension on the screw seat, be equipped with universal locking hole on the reinforcing plate, the downthehole supplementary nail that is equipped with of universal locking, main screw and supplementary nail are sacral nail and crisscross setting.
2. The sacral screw fixation structure as claimed in claim 1, wherein the reinforcing plate has a pair of arms for engaging with the screw seat, the arms have symmetrically formed recesses on opposite sides thereof, the symmetrically formed recesses defining insertion holes for insertion of the sidewalls of the U-shaped slot, the arms have symmetrically formed protrusions extending into the U-shaped slot, upper end surfaces of the protrusions define pressing engagement surfaces for engaging with the screw plug to press-fix the reinforcing plate in the screw seat, and side surfaces of the protrusions define stop engagement surfaces for engaging with the sidewalls of the U-shaped slot to prevent the reinforcing plate from coming off the screw seat;
the pair of embracing arms are of deformable structures, and a moving gap is formed between the pair of embracing arms, so that the pair of embracing arms can be clamped and moved by an instrument to clasp and fix the screw seat after being inserted into the screw seat.
3. The sacral screw fixation structure as recited in claim 2, wherein the reinforcement plate is Z-shaped and comprises an upper transverse plate, a vertical plate, and a lower transverse plate, the arm is disposed on the upper transverse plate, the universal locking hole is disposed on the lower transverse plate, the upper transverse plate is located above the titanium rod, an upper end surface of a protrusion disposed on the arm is directly in press fit with the plug screw, and a lower end surface of the protrusion is in press fit with the titanium rod.
4. The sacral screw fixation structure as recited in claim 3, wherein a lower end surface of the protuberance is an arcuate structure that mates with a cylindrical surface of the titanium rod.
5. The sacral screw fixation structure as recited in claim 3, wherein a pair of first instrument holding grooves are provided on an outer side wall of the U-shaped channel, and wherein a riser of the reinforcement plate is provided with a catch on a side facing the U-shaped channel that mates with the first instrument holding grooves;
and/or, be equipped with a pair of second apparatus centre gripping recess on the terminal surface around the lateral wall in U-shaped groove, what the reinforcing plate was embraced is equipped with on the arm with second apparatus centre gripping recess matched with sand grip, it is deformable structure to embrace the arm, it installs to embrace the arm after on the U-shaped groove by the apparatus centre gripping deformation messenger the sand grip gets into thereby second apparatus centre gripping recess with the U-shaped groove is firmly fixed.
6. A sacral screw fixation structure as in any one of claims 2 to 5 wherein said arms are in snug engagement with one side wall of a U-shaped slot in the screw base, the arms being provided with a pair of recesses into which one side wall of the U-shaped slot is inserted, the distal ends of the arms being provided with said projections;
or the holding arm is tightly held and matched with two side walls of a U-shaped groove on the screw seat, two pairs of grooves for inserting the two side walls of the U-shaped groove are formed in the pair of holding arms, and the protrusion is arranged in the middle of the holding arm.
7. The sacral screw fixation structure as claimed in claim 1, wherein said reinforcing plate is Z-shaped, a lateral cross plate of said reinforcing plate has a lower opening for being fastened to a top of the screw seat, said lower opening having a through hole therein;
the screw plug comprises a first threaded section positioned at the lower part and a second threaded section positioned at the upper part, the first threaded section is used for being in threaded connection with two side walls of the U-shaped groove, the outer diameter of the second threaded section is smaller than that of the first threaded section, and the second threaded section is used for penetrating through the through hole in the reinforcing plate and fixing the reinforcing plate on the screw seat through a fixing nut;
the outer side wall of the U-shaped groove is provided with a pair of instrument clamping grooves, and the middle vertical plate of the reinforcing plate faces towards one side of the U-shaped groove and is provided with a buckle matched with the instrument clamping grooves.
8. The sacral screw fixation structure as recited in claim 1, wherein a pair of instrument clamping grooves are provided on an outer side wall of the U-shaped channel;
the reinforcing plate is Z-shaped, be equipped with on one side diaphragm of reinforcing plate and be used for detaining the under shed of establishing at screw seat top, the edge of under shed is equipped with the first buckle with one side apparatus centre gripping recess matched with, the middle part riser of reinforcing plate is in the orientation be equipped with in the one side in U-shaped groove with opposite side apparatus centre gripping recess matched with second buckle, the reinforcing plate passes through first buckle and second buckle are detained and are established the joint and be in on the screw seat.
9. A sacral screw fixation structure as recited in claim 3, or 4, or 5, or 7, or 8, wherein said gimbal lock holes are located on the other lateral cross plate of said reinforcement plate and are two in number, and wherein said auxiliary nails in said gimbal lock holes are symmetrically distributed along the axis.
10. The sacral screw fixation structure as recited in claim 1, wherein the reinforcing plate is a horizontal plate, one end of the reinforcing plate is integrally formed with a bottom of the screw seat, the other end of the reinforcing plate is also provided with a screw seat, a main screw and a titanium rod, and two ends of the reinforcing plate are of the same structural form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021727455.0U CN212521976U (en) | 2020-08-18 | 2020-08-18 | Sacrum screw fixing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021727455.0U CN212521976U (en) | 2020-08-18 | 2020-08-18 | Sacrum screw fixing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212521976U true CN212521976U (en) | 2021-02-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021727455.0U Active CN212521976U (en) | 2020-08-18 | 2020-08-18 | Sacrum screw fixing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212521976U (en) |
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2020
- 2020-08-18 CN CN202021727455.0U patent/CN212521976U/en active Active
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