CN202654215U - Locking combined screw system - Google Patents

Locking combined screw system Download PDF

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Publication number
CN202654215U
CN202654215U CN 201120432959 CN201120432959U CN202654215U CN 202654215 U CN202654215 U CN 202654215U CN 201120432959 CN201120432959 CN 201120432959 CN 201120432959 U CN201120432959 U CN 201120432959U CN 202654215 U CN202654215 U CN 202654215U
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CN
China
Prior art keywords
screw thread
assembly
screw
locking
thread
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Expired - Fee Related
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CN 201120432959
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Chinese (zh)
Inventor
徐达强
秦琳玲
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WUXI SHIYI ELECTRIC POWER MACHINERY EQUIPMENT CO Ltd
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WUXI SHIYI ELECTRIC POWER MACHINERY EQUIPMENT CO Ltd
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Priority to CN 201120432959 priority Critical patent/CN202654215U/en
Application granted granted Critical
Publication of CN202654215U publication Critical patent/CN202654215U/en
Anticipated expiration legal-status Critical
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Abstract

The utility model discloses a locking combined screw system, which comprises an assembly (A), an assembly (B) and a locking bone fracture plate (C), wherein the assembly (A) consists of threads (1) and threads (2); a structure (3) is arranged on the tail parts of the threads (2); the assembly (B) consists of threads (4) and threads (5), and the inside of the assembly (B) is hollow; a hollow structure (7) is arranged in the threads (5); the diameter of the tail structure (3) of the threads (2) is smaller than the pore diameter of the hollow part in the assembly (B); the assembly (A) and the assembly (B) are connected with the threads (4) by the threads (2); and the assembly (B)and the locking bone fracture plate (C) are connected with threads (12) by the threads (5). The locking combined screw system is characterized in that thread pitches of the threads (2) and (4) are equal to those of the threads (5) and (12); and the threads (1), (2), (4), (5) and (12) are coaxial threads. By the locking combined screw system, serious fractures can be treated, and the pain of patients during treatment can be reduced.

Description

A kind of locking screw assemblies system
Technical field
This utility model relates to bone fracture internal fixing device, relates in particular to the inner fixing device and the system that are applied to the joint syntripsis.
Background technology
At present the Therapeutic Principle of articular fracture is as follows: blade plate supported to rebuild metaphysis, postoperative early functional exercise after intra-articular fracture needed the pressurization of noinvasive anatomical reduction, intra-articular fracture piece of articular surface and strong fixing, bone grafting and bone grafting.Rebuild joint metaphysis the need protection vigor of soft tissue and the integrity of peplos, the setting board of skeleton end fracture piece does not need anatomical reduction, as long as keep the axis of limbs, by the integrally-built relatively stable early functional exercise that allows control.
But can't realize that when the articular surface degree of grinding is heavier pressurization between the articular surface fixes, because the sclerite of pulverizing can't good communication pressure; In this case, if adopt the lag screw technology can cause the joint narrowed width, affect embolia, processing clinically at present this situation mainstream technology is the locking bone fracture plate technology, by the angle stability support joint face between screw and the blade plate; The shortcoming of this technology is as follows: the lock screw screw thread is more shallow, more is similar to bolt, and the resistance to plucking in spongy bone is exerted oneself relatively poor; And that the resistance to plucking of common cancellous bone screw in spongy bone exerted oneself is good, but can't form with locking bone fracture plate the integral body of a locking.
The utility model content
The technical problems to be solved in the utility model be heavier for the articular surface degree of grinding, can't adopt a kind of locking screw assemblies system is provided in this situation of pressurization technology, make this screw system have the axial angle stability that locking bone fracture plate system has, also possess cancellous bone screw good resistance to plucking in spongy bone simultaneously and exert oneself.
For solving the problems of the technologies described above, this utility model provides following technical scheme: a kind of locking screw assemblies system, comprise assembly A, assembly B and locking bone fracture plate C, assembly A is made of screw thread 1 and screw thread 2 two parts, screw thread 2 afterbodys are provided with structure 3, assembly B is by screw thread 4, screw thread 5, and assembly B inner hollow is provided with hollow structure 7 in the screw thread 5; Screw thread 2 tail structures 3 diameters are less than the aperture of assembly B inner hollow; Assembly A is connected with screw thread 4 by screw thread 2 with assembly B, and assembly B is connected with screw thread 12 with the screw thread 5 that locking bone fracture plate C passes through; Wherein: described screw thread 2,4 pitch equal screw thread 5,12 pitch, and screw thread 1,2,4,5,12 is coaxial threaded.
As a kind of preferred version of locking screw assemblies described in the utility model system, wherein: the wall thickness of described assembly B screw thread 5 parts is more than or equal to the wall thickness of screw thread 4 parts.
A kind of preferred version as locking screw assemblies described in the utility model system, wherein: described assembly B is made of screw thread 4, screw thread 5 and screw thread 9, screw thread 9 with tapering is realized being press-fitted being threaded with screw thread 12, and the pitch of screw thread 5 and the depth of thread equal pitch and the depth of thread of screw thread 9.
As a kind of preferred version of locking screw assemblies described in the utility model system, wherein: the aft mounted structure 3 of described assembly A screw thread 2, it is shaped as prism-shaped or quincunx column, and it is arranged in the screw thread 2 axle cores or is positioned at outside the screw thread 2 axle cores.
A kind of preferred version as locking screw assemblies described in the utility model system, wherein: the depth of thread of the screw thread 1 of described assembly A and pitch are greater than the depth of thread and the pitch of screw thread 2, and the hollow structure 7 of described assembly B screw thread 5 interior settings is shaped as prism-shaped or quincunx column.
As a kind of preferred version of locking screw assemblies described in the utility model system, wherein: there is the micropore of One's name is legion on the non-threaded surface of described assembly B.
As a kind of preferred version of locking screw assemblies described in the utility model system, wherein: described assembly B inside is provided with excessive in the hollow structure 7 of threaded portion 8 connecting threads 4 with assembly B afterbody.
As a kind of preferred version of locking screw assemblies described in the utility model system, wherein: the structure 3 of described screw thread 2 afterbodys is complementary with the interior bottle opener 10 of composite screwdriver, and the hollow structure 7 of described assembly B afterbody is complementary with the outer bottle opener 11 of composite screwdriver.
The technique effect that this utility model is useful comprises:
One, screw thread 1 anchoring in spongy bone provides good resistance to plucking to exert oneself; Screw thread 2,4 has been realized being threaded between assembly A, assembly B and the blade plate C with screw thread 5,9,12, improves the resistance to plucking in spongy bone of screw when making it have good angle axial stability and exerts oneself;
Two, assembly B fixes with the screw thread 12 press-fit screw threads of locking bone fracture plate C with the screw thread 9 of tapering, so that being connected between assembly B and the blade plate C is more reliable.
Three, the non-threaded part in assembly B surface so that the numerous micropore of surperficial quantity of formation in bone will be grown into micropore like this, forms synostosis, thereby obtains to fix biology, has further improved the stability of Pin-bone interface through spray treatment; This seems particularly important existing in osteoporosis situation;
Four, adopt device described in the utility model, the required torsion of device that then is screwed into the intra-articular fracture piece can rely on apparatus to carry out accurate Calculation, does not have the gradient of learning curve, and the formation that is conducive to this technology quantitative criteria reaches to be popularized.
Description of drawings
Fig. 1 is the sketch map of assembly A.
Fig. 2 is the end view of assembly A.
Fig. 3 is the sketch map of I type assembly B.
Fig. 4 is I type assembly B end view.
Fig. 5 is the sketch map of II type assembly B.
Fig. 6 is the generalized section of locking bone fracture plate C.
Fig. 7 is assembly A, II type assembly B and locking bone fracture plate C connection diagram.
Fig. 8 is II type assembly B and the locking bone fracture plate C connection diagram that there is micropore on assembly A, surface.
Fig. 9 is the sketch map of composite screwdriver.
Figure 10 is the interior bottle opener sketch map of composite screwdriver.
Figure 11 is the sketch map of system described in the utility model user mode.
The specific embodiment
The below is described in further detail this utility model by reference to the accompanying drawings take articular fracture as example.
Such as Fig. 1-Figure 11, locking screw assemblies described in the utility model system is comprised of following: assembly A, assembly B and locking bone fracture plate C also comprise the composite screwdriver that is used.Comprising: screw thread 1, screw thread 2, structure 3, screw thread 4, screw thread 5, screw thread 4 inner hollow 6, screw thread 5 inner hollow 7, excessively without threaded portion 8, screw thread 9, interior bottle opener 10, outer bottle opener 11, screw thread 12.
As shown in Figure 1, 2, assembly A is by screw thread 1, and screw thread 2 forms, and screw thread 2 afterbodys are provided with structure 3, and its shape is various, prism-shaped or quincunx for example, and its position can be positioned in the screw thread 2 axle cores or be positioned at outside the screw thread 2 axle cores; Structure 3 diameters are less than assembly B inner hollow part, and the composite screwdriver or the sleeve that mate with structure 3 can pass assembly B hollow, by this prismatic structure fixation kit A.
No matter which kind of shape screw thread 2 afterbodys are, the interior bottle opener of composite screwdriver all will be designed to be complementary with screw thread 2 tail structures 3.Screw thread 1 is similar or be equal to the screw thread design of standard cancellous bone screw, and its depth of thread and pitch are larger with respect to screw thread 2.During use, screw thread 1 is screwed into offside intra-articular fracture piece, this moment assembly A and anchoring of offside intra-articular fracture piece.Screw thread 1 should be twisted fracture line, entered fully in the offside intra-articular fracture piece, and the resistance to plucking that screw thread 1 provides is exerted oneself and is better than lock screw, and its effect is similar or be equal to cancellous bone screw.The depth of thread of screw thread 2 and pitch is less than the depth of thread and the pitch of screw thread 1, and screw thread 2 is that sclerite resets and realizes the part of pressor effect between sclerite in the subjoint intrinsic articulation.Be positioned at the structure 3 of screw thread 2 afterbodys, on the one hand can utilize this structure that assembly A is screwed in the sclerite, can utilize on the other hand its interior bottle opener with composite screwdriver to mate, with fixation kit A.
Shown in Fig. 3-5: assembly B is by screw thread 4, excessively form without threaded portion 8, screw thread 5, screw thread 9, and assembly B inside is hollow, and bottle opener can pass this hollow space in the composite screwdriver, thus fixation kit A.Excessively provide the length variations of assembly B without the effect of threaded portion 8, it also can be designed to screw thread 4, its not necessarily, arranging excessively can provide potential mechanics advantage without threaded portion 8.Screw thread 4 is identical with pitch and the depth of thread of assembly A screw thread 2, has realized being connected of assembly A and assembly B being connected between screw thread 2 and the screw thread 4.Screw thread 5,9 pitch equal the pitch of screw thread 4, screw thread 5, the 9th, the part of coupling assembling B and locking bone fracture plate C.Screw thread 5, the 9 inner hollow structures 7 that arrange, its shape is various, for example prism-shaped or quincunx.Utilize composite screwdriver assembly B can be connected in assembly A and locking bone fracture plate C.The aperture of the hollow structure 7 of screw thread 5 inside is greater than the diameter of assembly A structure 3, so that the interior bottle opener of composite screwdriver can pass the hollow space in the assembly B, when the outer bottle opener runner assembly B of composite screwdriver assembly A is fixed.Among the described assembly B excessively without the wall thickness of threaded portion 8 and the screw thread 5 parts wall thickness more than or equal to screw thread 4, so excessively be not less than screw thread 4 without threaded portion 8 and screw thread 5 mechanical properties; The physics principle of design is as follows like this: under external force, the suffered stress of pinning becomes large from pinning nail tip section gradually to following closely afterbody under the interior fixed structure of locking; This design has reduced the in vivo probability of fracture of screw assemblies.
The interior bottle opener of composite screwdriver can pass the hollow space in the assembly B, when the outer bottle opener runner assembly B of composite screwdriver assembly A is fixed; Assembly B afterbody realizes that with screw thread 12 being press-fitted sample is threaded with the screw thread 9 of tapering.
Such as Fig. 6-shown in Figure 11, locking bone fracture plate C shape can be various, it is provided with screw thread 12, the degree of depth of its pitch and screw thread and screw thread 5,9,12 identical, screw thread 12 and screw thread 5 afterbodys realize that with the locking that can realize being connected between the screw thread 9 of tapering between assembly B and the locking bone fracture plate C press-fit is threaded.
So-called homonymy intra-articular fracture piece refers to the contacted side with locking bone fracture plate C, and so-called offside intra-articular fracture piece refers to the sclerite corresponding with homonymy intra-articular fracture piece.
The use procedure of relevant pressurized locking combined screw system described in the utility model in the concrete operation:
The first step: by the standard procedures flow process, sterilization spreads single, and exposes fracture by the standard procedures approach, resets and utilizes Kirschner wire or the temporary fixed fracture of reduction forceps, perspective to confirm to reset good;
Second step: first fixation kit A: punch to offside intra-articular fracture piece in the ipsilateral fracture piece with the operation target drill, and measure the nail hole depth; According to the scale of the nail hole depth that records in conjunction with interior sub-surface, screw thread 1 part of assembly A is screwed into the suitable degree of depth, so that screw thread 1 part of assembly A enters offside intra-articular fracture piece fully, screw thread 1 should be twisted fracture line, this moment assembly A and anchoring of offside intra-articular fracture piece.The resistance to plucking that screw thread 1 provides is exerted oneself and is better than lock screw, and its effect is similar to cancellous bone screw.
The 3rd step: should such as temporary fixed locking bone fracture plate C of apparatus such as pelvis-repositioning pincers, avoid locking bone fracture plate C to move or rotate by corresponding device, make locking bone fracture plate C be close to the cortical bone surface of homonymy intra-articular fracture piece.The outer bottle opener of composite screwdriver is connected with for example torque force device of torque spanner and so on, in order to can detect at any time used torsion numerical value.The interior bottle opener of composite screwdriver is passed hollow space in the assembly B, agree with mutually with assembly A structure 3, with fixation kit A, then rotate the outer bottle opener of composite screwdriver, so that constantly screw between assembly B and locking bone fracture plate C and the assembly A.Assembly A fixes because of interior bottle opener, keeps resting state; Assembly B rotates and to the head movement of assembly A, the contiguous spongy bone of simultaneously assembly B extruding makes the spongy bone densification along screw thread 2.Because with being to be press-fitted sample to be threaded between taper thread 9 and the screw thread 12, be similar to locking bone fracture plate system, can quantize the needed moment of torsion of locking between screw thread 9 and 12, the incidence rate that condensation is tied occurs between decremental component B and the blade plate C.In this course, after the interior bottle opener of composite screwdriver passes assembly B, assembly A is fixed; So assembly A is motionless in this course, the beneficial effect of generation is as follows: avoid assembly A to rotate in this course, cause the contiguous spongy bone of screw thread 1 cutting, effectively protect the screw thread 1 of assembly A and the interface between the spongy bone.
The 4th step: according to the operation needs, can be screwed into a plurality of devices described in the utility model at the suitable screw hole of locking bone fracture plate by identical flow process; According to the operation needs, also can be screwed into the other types screw at the suitable screw hole of locking bone fracture plate, for example lock screw or standard os integumentale screw.
The 5th step: the perspective affirmation reduction of the fracture and interior fixed position are good again, are seamed to successively skin after flushing wound surface and the definite hemostasis.
The unique design of device described in the utility model so that cancellous bone screw combine together in the good resistance to plucking of the cancellous bone screw axial angle stability that has with locking bone fracture plate system of exerting oneself; And the assembly B densification of spongy bone on every side and the increase that the resistance to plucking of screw assemblies in spongy bone exerted oneself; The confirmed concept that is formed by the artificial joint field: the medical metal surface is after the spray treatment such as sandblast, porous and hydroxyapatite coating layer, osseous tissue can be grown into and be sprayed the position, so non-threaded the spray treatment in assembly B surface grown into bone and sprayed in the micropore at position, form synostosis, thereby obtain to fix biology, further improved the stability at bone-screw assemblies interface; So that screw assemblies described in the utility model system has further improved the fixing reliability of implant system with respect to locking bone fracture plate system, this seems particularly important existing in osteoporosis situation;
It should be noted that, above embodiment is only unrestricted in order to the technical solution of the utility model to be described, although with reference to preferred embodiment this utility model is had been described in detail, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement the technical solution of the utility model, and not breaking away from the spirit and scope of technical solutions of the utility model, it all should be encompassed in the middle of the claim scope of the present utility model.

Claims (8)

1. one kind locks the screw assemblies system, comprise assembly (A), assembly (B) and locking bone fracture plate (C), assembly (A) is made of screw thread (1) and screw thread (2) two parts, screw thread (2) afterbody is provided with structure (3), assembly (B) is by screw thread (4), screw thread (5), assembly (B) inner hollow is provided with hollow structure (7) in the screw thread (5); Screw thread (2) tail structure (3) diameter is less than the aperture of assembly (B) inner hollow; Assembly (A) is connected with screw thread (4) by screw thread (2) with assembly (B), and assembly (B) is connected with screw thread (12) with the screw thread (5) that locking bone fracture plate (C) passes through; It is characterized in that: the pitch of described screw thread (2), (4) equals the pitch of screw thread (5), (12), and screw thread (1), (2), (4), (5), (12) are coaxial threaded.
2. locking screw assemblies according to claim 1 system, it is characterized in that: the wall thickness of described assembly (B) screw thread (5) part is more than or equal to the wall thickness of screw thread (4) part.
3. locking screw assemblies according to claim 1 system, it is characterized in that: described assembly (B) is made of screw thread (4), screw thread (5) and screw thread (9), screw thread (9) with tapering is realized being press-fitted being threaded with screw thread (12), and the pitch of screw thread (5) and the depth of thread equal pitch and the depth of thread of screw thread (9).
4. locking screw assemblies according to claim 1 system, it is characterized in that: the aft mounted structure (3) of described assembly (A) screw thread (2), it is shaped as prism-shaped or quincunx column, and it is arranged in screw thread (2) the axle core or is positioned at outside screw thread (2) the axle core.
5. locking screw assemblies according to claim 1 system, it is characterized in that: the depth of thread of the screw thread (1) of described assembly (A) and pitch are greater than the depth of thread and the pitch of screw thread (2), and the hollow structure (7) that arranges in described assembly (B) screw thread (5) is shaped as prism-shaped or quincunx column.
6. locking screw assemblies according to claim 1 system, it is characterized in that: there is the micropore of One's name is legion on the non-threaded surface of described assembly (B).
7. locking screw assemblies according to claim 1 system, it is characterized in that: described assembly (B) inside is provided with excessive in the hollow structure (7) of threaded portion (8) connecting thread (4) with assembly (B) afterbody.
8. pressurized locking combined screw system according to claim 1, it is characterized in that: the structure (3) of described screw thread (2) afterbody is complementary with the interior bottle opener (10) of composite screwdriver, and the hollow structure (7) of described assembly (B) afterbody is complementary with the outer bottle opener (11) of composite screwdriver.
CN 201120432959 2011-11-04 2011-11-04 Locking combined screw system Expired - Fee Related CN202654215U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120432959 CN202654215U (en) 2011-11-04 2011-11-04 Locking combined screw system

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Application Number Priority Date Filing Date Title
CN 201120432959 CN202654215U (en) 2011-11-04 2011-11-04 Locking combined screw system

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CN202654215U true CN202654215U (en) 2013-01-09

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104644256A (en) * 2015-03-13 2015-05-27 邱正奭 Internal fixation hollow needle for patellar fracture
EP3086727A4 (en) * 2013-12-26 2017-10-11 Skeletal Dynamics, LLC Headless compression screw

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3086727A4 (en) * 2013-12-26 2017-10-11 Skeletal Dynamics, LLC Headless compression screw
CN104644256A (en) * 2015-03-13 2015-05-27 邱正奭 Internal fixation hollow needle for patellar fracture

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130109

Termination date: 20131104