CN203524761U - Expansion type metal bone-setting locking screw - Google Patents
Expansion type metal bone-setting locking screw Download PDFInfo
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- CN203524761U CN203524761U CN201320608520.1U CN201320608520U CN203524761U CN 203524761 U CN203524761 U CN 203524761U CN 201320608520 U CN201320608520 U CN 201320608520U CN 203524761 U CN203524761 U CN 203524761U
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- screw
- expansion type
- screw rod
- type metal
- spiral shell
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Abstract
The utility model discloses an expansion type metal bone-setting locking screw which comprises a screw rod and a screw cap connected to the upper end of the screw rod. The outer wall of the screw rod is provided with rod threads used for being connected with a bone, screw cap threads used for being connected with a metal bone-setting plate are formed outside the side wall of the screw cap, and a torx groove or a hexagonal groove is formed inside the screw cap; the screw rod is of a hollow structure, and a plurality of through longitudinal expansion gaps are formed in the front section of the expansion type locking screw and used for being connected with screw cores in different shapes. The expansion type metal bone-setting locking screw has the advantages of being resistant to loosening and pulling, can reduce the occurrence rate that the screw is loosened and disengaged from a cancellous bone and effectively improve the connecting reliability and stability of the screw in a condyle cancellous bone area, and is simple in design structure, easy to operate in the operation, and safe and stable in clinic using.
Description
Technical field
This utility model relates to the special-purpose locking bone plate screw system of a kind of orthopaedics, is specifically related to a kind of expansion type metal synthetism lock screw.
Background technology
In recent years, development along with locking bone plate internal fixation system, large quantities of novel condyle portion lockplate emerges in large numbers, but because current clinical conventional lock screw exists lifting insufficient strength with condyle portion spongy bone, especially when in the face of sufferers of osteoporosis face, common lock screw is difficult to reach anti-rotation, the object that resistance to plucking goes out, therefore often occur that internal fixation screw becomes flexible phenomenon, cause operative failure.So need to invent a kind of lock screw effective, that the anti-loosening resistance to plucking of strong operability goes out addresses this problem.
Utility model content
This utility model, for the problem of the lock screw of existing clinical practice not available anti-loosening, the anti-extraction function in spongy bone district, provides a kind of expansion type metal synthetism lock screw.
In order to achieve the above object, this utility model adopts following technical scheme:
Expansion type metal synthetism lock screw of the present utility model, comprises screw rod and the head of a nail that is connected to screw rod upper end; On screw rod outer wall, be provided with the bar portion screw thread for being connected with skeleton, be provided with the head of a nail screw thread for being connected with metal bone fracture plate on head of a nail sidewall outside, head of a nail inside is formed with Flos Mume groove or six square grooves; Inside screw is the structure of hollow, for connecting spiral shell core.
In described screw rod, the duct leading portion of bottom is tapered, and duct tail end is formed with female thread, and female thread is bolt with the external screw thread of spiral shell core and coordinates.
The axial direction of described bar portion screw thread from point along screw rod evenly cuts out the expansion clearance of two lobes, pintongs, six lobes or eight lobes, and expansion clearance extends to the afterbody of duct leading portion.
Advantage and the good effect that the utlity model has are:
Expansion type metal synthetism lock screw of the present utility model before being screwed into skeleton first by the supporting screw-in expansion type of screw-in spiral shell core lock screw, avoid osseous tissue to enter the hollow part of screw, increase the mechanical strength of expansion type lock screw simultaneously, prevent that screw is out of shape when being screwed into skeleton.After the expansion type lock screw implant into body placement with screw-in spiral shell core is appropriate, then screw-in spiral shell core is taken out, screw in bracing type spiral shell core.Because bracing type spiral shell core leading portion section diameter is thick compared with the corresponding internal diameter of expansion type lock screw duct leading portion part, due to expansion type lock screw leading portion, there is the longitudinal dilatation gap of many perforations simultaneously, therefore expansion type lock screw leading portion part is gradually umbrella and struts when being screwed into bracing type spiral shell core, cause shape to change, improve screw bone density, bone strength around simultaneously, thereby increase fixing stability and reliability in fracture, avoid screw loosening, reduce operative failure incidence rate.Therefore expansion type metal synthetism lock screw of the present utility model has advantages of that anti-loosening, resistance to plucking goes out, and this project organization is simple, has easy operating in operation, clinical use safety and stability.
Accompanying drawing explanation
Fig. 1 is the structural representation of expansion type metal synthetism lock screw of the present utility model;
Fig. 2 is the internal structure schematic diagram of expansion type metal synthetism lock screw of the present utility model;
Fig. 3 is the structural representation of screw-in spiral shell core;
Fig. 4 is the structural representation of bracing type spiral shell core;
Fig. 5 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and screw-in spiral shell core;
Fig. 6 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and bracing type spiral shell core;
Fig. 7 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and metal bone fracture plate.
Critical piece symbol description in accompanying drawing:
1: screw rod 2: screw-in spiral shell core
3: bracing type spiral shell core 4: head of a nail screw thread
5: bar portion screw thread 6: duct leading portion
7: female thread 8: point
9: expansion clearance 10: external screw thread
11: Flos Mume groove 12: screw-in spiral shell core leading portion
13: bracing type spiral shell core leading portion 14: Flos Mume groove
15: metal bone fracture plate screw hole.
The specific embodiment
Below in conjunction with the drawings and specific embodiments, a kind of expansion type metal synthetism lock screw of the present utility model is described further.Following each embodiment is only not limitation of the utility model for this utility model is described.
For the lock screw of existing clinical practice in spongy bone district not available anti-loosening, anti-extraction function, this utility model provides a kind of expansion type metal synthetism lock screw, prevents that screw from becoming flexible in spongy bone district.Fig. 1 is the structural representation of expansion type metal synthetism lock screw of the present utility model; Fig. 2 is the internal structure schematic diagram of expansion type metal synthetism lock screw of the present utility model.
As depicted in figs. 1 and 2, expansion type metal synthetism lock screw of the present utility model, comprises screw rod 1 and the head of a nail that is connected to screw rod 1 upper end.On screw rod 1 outer wall, be provided with the bar portion screw thread 5 for being connected with skeleton.On head of a nail sidewall outside, be provided with the head of a nail screw thread 4 for being connected with metal bone fracture plate.Head of a nail inside is formed with and can, for being screwed into Flos Mume groove 14 or six square grooves, uses special spanner, by six square grooves, expansion type lock screw is screwed into skeleton.
Inside screw is the structure of hollow, for connecting spiral shell core.In screw rod, the duct leading portion 6 of bottom is tapered, and duct tail end is formed with female thread 7, and female thread is bolt with the external screw thread of spiral shell core and coordinates.
The axial direction of bar portion screw thread 5 from point 8 along screw rod 1 evenly cuts out the expansion clearance 9 of two lobes, pintongs, six lobes or eight lobes, and expansion clearance 9 extends to the afterbody of duct leading portion 6.
Fig. 3 is the structural representation of screw-in spiral shell core.As shown in Figure 3, the afterbody of screw-in spiral shell core 2 is provided with external screw thread 10 and Flos Mume groove 11 or six square grooves that can supply to be screwed into, to back-out, and screw-in spiral shell core leading portion 12 is taper.
Fig. 4 is the structural representation of bracing type spiral shell core.As shown in Figure 4, the afterbody of bracing type spiral shell core 3 is also provided with external screw thread 10 and Flos Mume groove 11 or six square grooves that can supply to be screwed into, to back-out, and bracing type spiral shell core leading portion 13 is arc.
Fig. 5 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and screw-in spiral shell core; Fig. 6 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and bracing type spiral shell core.As shown in Figure 5 and Figure 6, screw-in spiral shell core 2 or bracing type spiral shell core 3 are connected to the part of lock screw inner hollow, because the point 8 of the lower end of expansion type lock screw evenly cuts out the expansion clearance 9 of two lobes or pintongs or six lobes or eight lobes along the axial direction of lock screw 1.The screw-in spiral shell core leading portion that both can hold taper, can hold again the bracing type spiral shell core leading portion of arc.
Fig. 7 is the assembly structure schematic diagram of expansion type metal synthetism lock screw of the present utility model and metal bone fracture plate.As shown in Figure 7, expansion type lock screw head of a nail screw thread 4 is connected with 15 lockings of metal bone fracture plate screw hole, and bar portion screw thread 5 is connected with skeleton.Inner screw-in spiral shell core 2 or the bracing type spiral shell core 3 of connecting of lock screw.
This expansion type metal synthetism lock screw is before being screwed into skeleton, first by the supporting screw-in expansion type of screw-in spiral shell core lock screw, avoid osseous tissue to enter the hollow part of screw, increase the mechanical strength of expansion type lock screw simultaneously, prevent that screw is out of shape when being screwed into skeleton.After the expansion type lock screw implant into body placement with screw-in spiral shell core is appropriate, then screw-in spiral shell core is taken out, screw in bracing type spiral shell core.Because bracing type spiral shell core leading portion section diameter is thick compared with the corresponding internal diameter of expansion type lock screw duct leading portion part, due to expansion type lock screw leading portion, there is the longitudinal dilatation gap of many perforations simultaneously, therefore expansion type lock screw leading portion part is gradually umbrella and struts when being screwed into bracing type spiral shell core, cause shape to change, improve screw bone density, bone strength around simultaneously, thereby increase fixing stability and reliability in fracture, avoid screw loosening, reduce operative failure incidence rate.
Therefore, expansion type metal synthetism lock screw of the present utility model has advantages of that anti-loosening, resistance to plucking goes out.It can reduce screw and in spongy bone district, become flexible the incidence rate of deviating from, and effectively improves reliability, stability that lock screw Ke Bu spongy bone district connects.And this project organization is simple, in operation, there is easy operating, clinical use safety and stability.
Claims (3)
1. an expansion type metal synthetism lock screw, comprises screw rod (1) and is connected to the head of a nail of screw rod upper end; It is characterized in that: on screw rod outer wall, be provided with the bar portion screw thread (5) for being connected with skeleton, be provided with the head of a nail screw thread (4) for being connected with metal bone fracture plate on head of a nail sidewall outside, head of a nail inside is formed with Flos Mume groove (14) or six square grooves; Screw rod (1) inside is the structure of hollow, for connecting spiral shell core.
2. a kind of expansion type metal synthetism lock screw according to claim 1, it is characterized in that: the duct leading portion (6) of the interior bottom of screw rod (1) is tapered, duct tail end is formed with female thread (7), and female thread (7) is bolt with the external screw thread of spiral shell core and coordinates.
3. a kind of expansion type metal synthetism lock screw according to claim 1, it is characterized in that: the axial direction of bar portion screw thread (5) from point (8) along screw rod (1) evenly cuts out the expansion clearance (9) of two lobes, pintongs, six lobes or eight lobes, and expansion clearance (9) extend to the afterbody of duct leading portion (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608520.1U CN203524761U (en) | 2013-09-30 | 2013-09-30 | Expansion type metal bone-setting locking screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320608520.1U CN203524761U (en) | 2013-09-30 | 2013-09-30 | Expansion type metal bone-setting locking screw |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203524761U true CN203524761U (en) | 2014-04-09 |
Family
ID=50411030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320608520.1U Expired - Lifetime CN203524761U (en) | 2013-09-30 | 2013-09-30 | Expansion type metal bone-setting locking screw |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203524761U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104546106A (en) * | 2015-01-26 | 2015-04-29 | 山东省文登整骨医院 | High-hold bone screw |
| CN106963520A (en) * | 2017-04-13 | 2017-07-21 | 安徽省立医院 | Acetabular outer cup |
| CN107981926A (en) * | 2017-09-20 | 2018-05-04 | 北京航空航天大学 | The new resistance to plucking based on increases material manufacturing technology goes out pedicle nail |
-
2013
- 2013-09-30 CN CN201320608520.1U patent/CN203524761U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104546106A (en) * | 2015-01-26 | 2015-04-29 | 山东省文登整骨医院 | High-hold bone screw |
| CN106963520A (en) * | 2017-04-13 | 2017-07-21 | 安徽省立医院 | Acetabular outer cup |
| CN106963520B (en) * | 2017-04-13 | 2020-03-17 | 安徽省立医院 | Acetabulum outer cup |
| CN107981926A (en) * | 2017-09-20 | 2018-05-04 | 北京航空航天大学 | The new resistance to plucking based on increases material manufacturing technology goes out pedicle nail |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |