CN203873858U - Internal fixing device for bones - Google Patents
Internal fixing device for bones Download PDFInfo
- Publication number
- CN203873858U CN203873858U CN201420145057.6U CN201420145057U CN203873858U CN 203873858 U CN203873858 U CN 203873858U CN 201420145057 U CN201420145057 U CN 201420145057U CN 203873858 U CN203873858 U CN 203873858U
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- Prior art keywords
- locking ring
- screw
- hole
- pressurization hole
- pressurization
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Abstract
The utility model discloses an internal fixing device for bones. The internal fixing device comprises a steel plate, locking rings, forcing screws and locking screws, forcing holes are formed in the steel plate and matched with the forcing screws, inner threads are arranged on the locking rings, outer threads are arranged on the locking screws, and the locking screws are matched with the locking rings which are detachably embedded in the forcing holes. According to the internal fixing device, the number of the forcing holes is multiple, in the using process, the locking rings can be only embedded into needed forcing holes according to conditions, and more choices are provided for surgeons.
Description
Technical field
This utility model relates to field of surgical, relates in particular to a kind of skeleton inner fixing device.
Background technology
After fracture, mostly need to adopt steel plate to fix, after bone healing, row is removed again.The steel plate of fix bone is divided into two types, and a kind of is compression steel plate, and another kind is locking steel plate.Locking steel plate is a kind of fracture fixation device that is threaded hole (lock hole), and these lock holes, after being screwed into externally threaded lock screw, just can be fixed on steel plate on skeleton.The screw hole of compression steel plate (pressurization hole) is not established screw thread but chute, coordinates forcing screw to use, when forcing screw tightens, relative sliding by forcing screw with pressurization hole, two broken ends of fractured bone of bone are pressurizeed mutually close, contact closelyr, make fracture be more prone to healing.
In order to realize, the better of fracture fixed, people have designed again locking compress steel plate, can make fracture contact closely.Locking compress steel plate is the combination of locking steel plate and two kinds of diverse technique for fixing of compression steel plate, and same steel plate both can be only used as dynamic compression plate and use, also can use by lock screw and then as inner support, or the associating of above two kinds of modes.As shown in Figure 1, the screw hole of locking compress steel plate is the figure of eight, is divided into not establishing screw thread and with chute pressurization hole 01 and the threaded lock hole 02 of chute.When coordinating lock hole to use by lock screw 3, this steel plate is locking steel plate; While using when coordinating pressurization hole with forcing screw 4, this firm plate is the firm plate of pressurization.The surgeon that appears as of locking compress steel plate provides more kinds of selections.
But the firm plate of locking compress of the prior art, only can pressurize in one direction, when skeleton has several sections of fracture, surgeon cannot be selected compression aspect.And in the screw hole of the figure of eight, the positional distance in lock hole and pressurization hole is larger, doctor cannot, according to practical situation, set the position in lock hole and pressurization hole.
Lock screw root of the prior art is provided with taper thread, and the screw thread of the 2-3 tooth of general lock screw root is taper thread, and this 2-3 pitch thread external diameter is obviously to become gradually large, and its external diameter is obviously greater than other screw thread.In other embodiments, locking ring can be arranged to, when lock screw is threaded to root, the taper thread larger by external diameter significantly struts locking ring feet, and then it is firmly fixed in pressurization hole.
Below with reference to accompanying drawing, the technique effect of design of the present utility model, concrete structure and generation is described further, to understand fully the purpose of this utility model, feature and effect.
Utility model content
Because the above-mentioned defect of prior art, in order to solve the technical problem of Bidirectional-pressure, and doctor can arrange the technical problem of pressurization hole or lock hole as required, this utility model provides a kind of locking steel plate function and compression steel plate function of simultaneously having concurrently, and the skeleton inner fixing device of energy Bidirectional-pressure.
For achieving the above object, this utility model provides a kind of skeleton inner fixing device, comprises steel plate, locking ring, forcing screw and lock screw; Described steel plate is provided with pressurization hole, and described forcing screw matches with described pressurization hole; Described locking ring is provided with female thread, and described lock screw is provided with external screw thread, and described lock screw matches with described locking ring; Described locking ring is removably embedded in described pressurization hole.In this utility model, the quantity in described pressurization hole is a plurality of, in use, can according to circumstances only in the pressurization hole of needs, embed locking ring, for surgeon provides more kinds of selections.
Further, described pressurization hole is Bidirectional-pressure hole.
Further, described pressurization hole is slotted eye, there is first end and the second end, first end and the second end are equipped with chute, when coordinating forcing screw to use, the direction that can pressurize as required, is placed in forcing screw first end or the second end in oval pressurization hole, when forcing screw coordinates with first end, to first direction, pressurize; When forcing screw coordinates with the second end, to second direction pressurization, described first direction is in contrast to described second direction.
Further, described locking ring is set to have the first state and the second state, and when described locking ring is set in described the first state, described locking ring can be pulled down in described pressurization hole; When described locking ring is set in described the second state, described locking ring can not be pulled down in described pressurization hole.
Further, when described lock screw screws in described locking ring, described locking ring is in described the second state.Preferably, when the described lock screw of >=1/2 length screws in described locking ring, described locking ring is in described the second state.More preferably, when the described lock screw of >=2/3 length screws in described locking ring, described locking ring is in described the second state.Most preferably, when described lock screw root screws in described locking ring, described locking ring is in described the second state.
Nearly step ground, described locking ring comprises annulus portion and supports foot, the inwall of described annulus portion and/or described support foot is provided with the female thread matching with described lock screw.When described lock screw screws in described locking ring, described lock screw struts described support foot, causes the external diameter that supports foot to become large, thereby makes described locking ring in described the second state.Described in when having lock screw to screw in, locking ring is not in the first state.In addition, forcing screw of the prior art, be generally taper, the diameter of the pointed head of forcing screw is less than the diameter of root, therefore, described locking ring can be arranged in other embodiments, such as, only have when surpassing the described lock screw of 1/2 length and screw in described locking ring, described lock screw just struts described support foot, and described locking ring is in described the second state.When being less than the described lock screw of 1/2 length and screwing in described locking ring, because lock screw head diameter is less, described lock screw cannot strut described support foot, and described locking ring is in described the first state.
Further, the internal diameter in the middle of described pressurization hole is less than the internal diameter at pressurization two ends, hole.Preferably, described pressurization hole inwall is provided with flange.Described flange can be located at the centre position in pressurization hole, and the internal diameter of pressurization hole at flange place is less than the internal diameter at pressurization two ends, hole.When feet is softened, due to the existence of flange, locking ring can not be exited in self-pressurization hole.
Accompanying drawing explanation
Fig. 1 is a kind of locking compress steel plate of the prior art;
Fig. 2 is the front view of a preferred embodiment of this utility model;
Fig. 3 is the structural representation of a preferred embodiment of this utility model;
Fig. 4 is the cutaway view of a preferred embodiment of this utility model;
Fig. 5 is the locking ring enlarged diagram of a preferred embodiment of this utility model;
Fig. 6 is that locking ring and the pressurization hole of a preferred embodiment of this utility model coordinates schematic diagram.
The specific embodiment
As shown in the figure, the present embodiment provides a kind of skeleton inner fixing device, comprises steel plate 1, locking ring 2, lock screw 3 and forcing screw 4; Steel plate 1 is provided with pressurization hole 11, and forcing screw 4 matches with pressurization hole 11; Locking ring 2 is provided with female thread, and lock screw 3 is provided with external screw thread, and lock screw 3 matches with locking ring 2; Locking ring 2 is removably embedded in pressurization hole 11.
In the present embodiment, pressurize hole 11 for Bidirectional-pressure hole.Pressurization hole 11 is slotted eye, there is first end and the second end, first end and the second end are equipped with chute, when coordinating forcing screw 4 to use, the direction that can pressurize as required, the first end or the second end that forcing screw 4 are placed in to oval pressurization hole 11, when forcing screw 4 coordinates with first end, pressurize to first direction; When forcing screw 4 coordinates with the second end, to second direction pressurization, first direction is in contrast to second direction.
Locking ring 2 is set to have the first state and the second state, and when locking ring 2 is set in the first state, locking ring 2 can be pulled down in self-pressurization hole 11; When locking ring 2 is set in the second state, locking ring 2 can not be pulled down in self-pressurization hole 11.In the present embodiment, when lock screw 3 screws in locking ring 2, locking ring 2 is in the second state, that is, when locking ring 2 is entrenched in pressurization hole 11, after lock screw 3 screws in locking ring 2, locking ring 2 can not exit from pressurization hole again.So design, the fixing stability of steel plate after can effectively guaranteeing to perform the operation.
In the present embodiment, the centre position of pressurization hole 11 inwalls is provided with inside flange 111, and the internal diameter of pressurization hole 11 at flange 111 places is less than the internal diameter at pressurization 11 two ends, hole.Locking ring 2 comprises annulus portion 21 and supports foot 22, supports foot 22 and be provided with altogether 4 feets in the present embodiment, and the inwall of annulus portion and/or support foot is provided with the female thread matching with lock screw 3.When lock screw 3 screws in locking ring 2, lock screw 3 struts support foot 22, causes the external diameter that supports foot 22 to become large, particularly supports foot 22 large away from the external diameter change of annulus portion 21 one end, thereby makes locking ring 2 in the second state.When not having lock screw 3 to screw in, locking ring 2, in the first state, can be pulled down in self-pressurization hole 11.In addition, lock screw 3 of the prior art, be generally taper, the diameter of the pointed head of lock screw 3 is less than the diameter of its root, therefore, locking ring 2 can be arranged in other embodiments, such as, only have when surpassing the lock screw 3 screw-in locking ring 2 of 1/2 length, lock screw 3 just struts support foot, and locking ring 2 is in the first state.
Lock screw root is generally provided with larger-diameter taper thread, therefore locking ring 2 can be set to, when lock screw 3 is threaded to root in other embodiments,, the taper thread larger by diameter significantly struts locking ring feet, and it is firmly fixed in pressurization hole 11.
More than describe preferred embodiment of the present utility model in detail.Should be appreciated that those of ordinary skill in the art just can make many modifications and variations according to design of the present utility model without creative work.Therefore, all technical staff in the art comply with design of the present utility model on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment, all should be in the determined protection domain by claims.
Claims (10)
1. a skeleton inner fixing device, is characterized in that, described device comprises steel plate, locking ring, forcing screw and lock screw; Described steel plate is provided with pressurization hole, and described forcing screw matches with described pressurization hole; Described locking ring is provided with female thread, and described lock screw is provided with external screw thread, and described lock screw matches with described locking ring; Described locking ring is removably embedded in described pressurization hole.
2. device as claimed in claim 1, is characterized in that, described pressurization hole is Bidirectional-pressure hole.
3. device as claimed in claim 1, it is characterized in that, described pressurization hole is slotted eye, have first end and the second end, first end and the second end are equipped with chute, when coordinating forcing screw to use, the direction that can pressurize as required, the first end or the second end that forcing screw are placed in to oval pressurization hole, when forcing screw coordinates with first end, pressurize to first direction; When forcing screw coordinates with the second end, to second direction pressurization, described first direction is in contrast to described second direction.
4. device as claimed in claim 1, is characterized in that, described locking ring is set to have the first state and the second state, and when described locking ring is set in described the first state, described locking ring can be pulled down in described pressurization hole; When described locking ring is set in described the second state, described locking ring can not be pulled down in described pressurization hole.
5. device as claimed in claim 4, is characterized in that, when described lock screw screws in described locking ring, described locking ring is in described the second state.
6. device as claimed in claim 5, is characterized in that, when the described lock screw of >=1/2 length screws in described locking ring, described locking ring is in described the second state.
7. device as claimed in claim 5, is characterized in that, when described lock screw root screws in described locking ring, described locking ring is in described the second state.
8. device as claimed in claim 5, is characterized in that, described locking ring comprises annulus portion and support foot, and the inwall of described annulus portion and/or described support foot is provided with the female thread matching with described lock screw.
9. device as claimed in claim 4, is characterized in that, the internal diameter in the middle of described pressurization hole is less than the internal diameter at pressurization two ends, hole.
10. device as claimed in claim 4, is characterized in that, described pressurization hole inwall is provided with flange.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420145057.6U CN203873858U (en) | 2014-03-27 | 2014-03-27 | Internal fixing device for bones |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420145057.6U CN203873858U (en) | 2014-03-27 | 2014-03-27 | Internal fixing device for bones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203873858U true CN203873858U (en) | 2014-10-15 |
Family
ID=51674418
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420145057.6U Expired - Fee Related CN203873858U (en) | 2014-03-27 | 2014-03-27 | Internal fixing device for bones |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203873858U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104814783A (en) * | 2015-04-23 | 2015-08-05 | 济南大学 | Locking pressurized bone fracture plate |
-
2014
- 2014-03-27 CN CN201420145057.6U patent/CN203873858U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104814783A (en) * | 2015-04-23 | 2015-08-05 | 济南大学 | Locking pressurized bone fracture plate |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141015 |