CN103349565B - Thread type lag screw system and special compound opener thereof - Google Patents
Thread type lag screw system and special compound opener thereof Download PDFInfo
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- CN103349565B CN103349565B CN201310260161.XA CN201310260161A CN103349565B CN 103349565 B CN103349565 B CN 103349565B CN 201310260161 A CN201310260161 A CN 201310260161A CN 103349565 B CN103349565 B CN 103349565B
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Abstract
The invention provides a thread type lag screw system which is characterized by comprising an I-type component and a thread type lag screw, wherein the interior of the I-type component is a column adopting a first hollow structure; first threads are formed in one end of the I-type component, and second threads are formed in the other end of the I-type component; the first threads are internal threads, and the second threads are external threads; the thread type lag screw comprises third threads, a first rod part and a tail part; the third threads are formed in one end of the first rod part, and the tail part is arranged at the other end of the first rod part; fourth threads are formed in the outer surface of the tail part; and the inside of the tail part adopts a second hollow prismatic structure. The invention further provides a special compound opener for the thread type lag screw system. According to the thread type lag screw system and the special compound opener thereof, the all effects of the lag screw can be realized, the tail part structure of the screw can be prevented from being damaged in jag screw screwing-in or pulling-out operation processes, and the jag screw can be taken out smoothly after fracture healing.
Description
Technical field
The present invention relates to medical fracture fixation device, particularly relate to and be applied to reset between sclerite, pressurize and strong fixing internal fixation system.
Background technology
In treatment, some need the fracture of operation, as articular fracture, fracture of femoral neck etc., need to realize resetting between sclerite by lag screw, pressurization strong fixing.The biomechanical principle that this Therapeutic Method is relevant is as follows: the axial compression stress that lag screw relies on pad or formed between blade plate and cortical bone, between sclerite, form pressor effect, realizes resetting between sclerite, pressurization strong fixing.
About in the clinical manipulation of lag screw, if a common problem is not screwed into lag screw in an appropriate manner can damage screw tail structure, cause further operation that difficulty occurs; Another common problem how to take out lag screw smoothly after union of fracture, and the process of this taking-up lag screw is sometimes very difficult, and especially in neck of femur position or the damage being screwed into the generation of lag screw afterbody, this difficulty is especially remarkable; How to be screwed into lag screw in an appropriate manner to damage to avoid screw tail structure, and lag screw can be taken out after making union of fracture smoothly all depend on the impact of the multiple factors such as patient's experience, fracture site, bone density, therefore, adverse influence is produced to promoting more widely of this technology of lag screw.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of thread type lag screw system and special screwdriver thereof, whole effects of lag screw can not only be completed, and in the operating process can avoiding being screwed into or taking out lag screw, damage the tail structure of screw, also contribute to take out lag screw smoothly after union of fracture.
For solving the problems of the technologies described above, the invention provides following technical scheme: a kind of thread type lag screw system, it is characterized in that: comprise I type assembly A and thread type lag screw D, described I type assembly A is the inner column in the first hollow structure 8, described I type assembly A one end is provided with the first screw thread 6, the other end is provided with the second screw thread 7, and described first screw thread 6 is female thread, and described second screw thread 7 is external screw thread; Described thread type lag screw D is made up of the 3rd screw thread 1, first bar portion 2 and afterbody 3, described first one end, bar portion 2 is provided with the 3rd screw thread 1, the other end is provided with afterbody 3, and described afterbody 3 outer surface is provided with the 4th screw thread 4, is provided with the second hollow prism shape structure 5 in described afterbody 3; Described I type assembly A is connected with described 4th screw thread 4 by described first screw thread 6 with described thread type lag screw D, diameter, the pitch of the diameter of described first screw thread 6, pitch and the depth of thread and described 4th screw thread 4 are identical with the depth of thread, described first screw thread 6 and described 4th screw thread 4 negative relational matching; Described first screw thread 6, second screw thread 7 and the 4th screw thread 4 are coaxial threaded.
As a kind of preferred version of a kind of thread type lag screw system of the present invention, wherein: also comprise the second assembly C, the outside of described second assembly C is the 3rd column structure 14, one end, inside of described second assembly C is provided with the 5th screw thread 11, the other end is provided with the 6th screw thread 13, is provided with transition part 12 between described 5th screw thread 11 and described 6th screw thread 13; Diameter, the pitch of the diameter of described 5th screw thread 11, pitch and the depth of thread and described second screw thread 7 are identical with the depth of thread, described 5th screw thread 11 and described second screw thread 7 negative relational matching; Described 5th screw thread 11, described 6th screw thread 13 are coaxial threaded with described second screw thread 7.
As a kind of preferred version of a kind of thread type lag screw system of the present invention, wherein: described I type assembly A replaces with II type assembly B, described II type assembly B is the 4th hollow prism shape structure 10 that one end is closed, and the inside of described II type assembly B is provided with the 7th screw thread 9; Described II type assembly B is connected with described 4th screw thread 4 by described 7th screw thread 9 with described thread type lag screw D, the diameter of described 7th screw thread 9 is identical with pitch with the diameter of described 4th screw thread 4 with pitch, described 7th screw thread 9 and described 4th screw thread 4 negative relational matching; Described 7th screw thread 9 and the 4th screw thread 4 are coaxial threaded.
As a kind of preferred version of a kind of thread type lag screw system of the present invention, wherein: described thread type lag screw D afterbody 3 shape is cylindrical or dome-type.
As a kind of preferred version of a kind of thread type lag screw system of the present invention, wherein: the first hollow structure 8 of described I type assembly A inside is hexagonal prismoid shape hollow structure.
As a kind of preferred version of a kind of thread type lag screw system of the present invention, wherein: described in described second assembly C, the pitch of the 5th screw thread 11 is less than the pitch of described 6th screw thread 13, the diameter being directly greater than described 6th screw thread 13 of described 5th screw thread 11.
As a kind of special composite screwdriver of a kind of thread type lag screw system of the present invention, wherein: comprise I type special screwdriver E, described I type special screwdriver E is made up of pentagonal prism shape structure the 15, the 8th screw thread 16, second bar portion 17 and first handle 18, described second one end, bar portion 17 connects described first handle 18, the other end connects described pentagonal prism shape structure 15, described second bar portion 17 is provided with described 8th screw thread 16 with the junction of described pentagonal prism shape structure 15, and described 8th screw thread 16 is external screw thread; The diameter of described 6th screw thread 13 is identical with pitch with the diameter of the 8th screw thread 16 with pitch, described 6th screw thread 13 and the 8th screw thread 16 negative relational matching, described 6th screw thread 13 is coaxial threaded with described 8th screw thread 16, the diameter of described pentagonal prism shape structure 15 is identical with shape with the diameter of described second hollow prism shape structure 5 with shape, and described pentagonal prism shape structure 15 is mated mutually with described second hollow prism shape structure 5.
As a kind of preferred version of a kind of special composite screwdriver of a kind of thread type lag screw system of the present invention, wherein: described pentagonal prism shape structure 15 and the diameter of described second hollow prism shape structure 5 are less than or equal to the diameter of described first hollow structure 8.
As a kind of preferred version of a kind of special composite screwdriver of a kind of thread type lag screw system of the present invention, wherein: the diameter in described second bar portion 17 is less than the diameter of described 5th screw thread 11, described 6th screw thread 13, described 8th screw thread 16 and described transition part 12.
As the another kind of special composite screwdriver of a kind of thread type lag screw system of the present invention, wherein: comprise II type special screwdriver F, described II type special screwdriver F is made up of sleeve-like configuration 19, the 3rd bar portion 20 and second handle 21, described 3rd one end, bar portion 20 connects described sleeve-like configuration 19, the other end connects described second handle 21, and described sleeve-like configuration 19 is mated mutually with described 4th hollow prism shape structure 10.
Device of the present invention is adopted to have following Advantageous Effects:
One, by being threaded of thread type lag screw afterbody and I type assembly A, realize the guide effect of I type assembly A in I type special screwdriver E double thread type lag screw operation, make the axis of I type special screwdriver E in all operations with the axis of thread type lag screw in line, I type special screwdriver E pentagonal prism shape structure 15 is avoided to shake when acting on lag screw afterbody second hollow prism shape structure 5, thread type lag screw is screwed into or takes out available protecting lag screw afterbody second hollow prism shape structure 5 in the process of bones at I type special screwdriver E,
Two, be connected available protecting the 4th screw thread 4 by thread type lag screw afterbody with II type assembly B, avoid soft tissue and skeleton in the process of union of fracture to grow into the 4th screw thread 4;
Three, make to there is compressive stress between the 4th screw thread 4, first screw thread 6, the 7th screw thread 9, the 5th screw thread 11, the 6th screw thread 13, the 8th screw thread 16 by the second screw thread 7, the 5th screw thread 11 and the 6th screw thread 13, the 8th screw thread 16 range difference that coaxial rotation produces counterclockwise, locking in mineralization pressure, makes thread type lag screw, I type assembly A, the second assembly C and I type special screwdriver E form an entirety reliably; By I type assembly A, the second assembly C, thread type lag screw is connected as a whole with I type special screwdriver E, make I type special screwdriver E can apply axial withdrawal force by the first handle 18 of I type special screwdriver E in the process of thread type lag screw being taken out from skeleton, the withdrawal force of this axis produces useful effect in the process of taking out thread type lag screw;
Four, make to produce compressive stress between the second hollow prism shape structure 5 and I type special screwdriver pentagonal prism shape structure 15 in thread type lag screw afterbody 3 by the second screw thread 7, the 5th screw thread 11 and the 6th screw thread 13, the 8th screw thread 16 range difference that coaxial rotation produces counterclockwise, second hollow prism shape structure 5 seamless closely fully contact with being formed between pentagonal prism shape structure 15, and in the stubborn screw process of this reduction, the probability of deformation occurs the second hollow prism shape structure 5.
Five, thread type lag screw these two operations are taken out after making to be screwed into thread type lag screw and union of fracture during fixing fracture by related equipment design more accurate, more easily grasp related medical technical ability, there is not the gradient of a learning curve, be conducive to the formation of standard and the universal of technology.
Accompanying drawing explanation
Fig. 1 is the schematic front view of thread type lag screw D;
Fig. 2 is the schematic front view of I type assembly A;
Fig. 3 is the volume rendering schematic diagram of I type assembly A.
Fig. 4 is the schematic front view of II type assembly B;
Fig. 5 is the volume rendering schematic diagram of II type assembly B;
Fig. 6 is the schematic front view of the second assembly C;
Fig. 7 is the volume rendering schematic diagram of the second assembly C;
Fig. 8 is the schematic front view of I type special screwdriver E;
Fig. 9 is the schematic front view of II type special screwdriver F;
Figure 10 is the combination schematic diagram of thread type lag screw D, I type assembly A, the second assembly C and I type special screwdriver E;
Figure 11 is the combination schematic diagram in a state of use of I type assembly A and thread type lag screw D; With,
Figure 12 is the combination schematic diagram in a state of use of II type assembly B and thread type lag screw D.
Wherein: A is I type assembly; B is II type assembly; C is the second assembly; D is thread type lag screw; E is I type special screwdriver; F is II type special screwdriver; 1 is the 3rd screw thread; 2 is the first bar portion; 3 is afterbody; 4 is the 4th screw thread; 5 is the second hollow prism shape structure; 6 is the first screw thread; 7 is the second screw thread; 8 is the first hollow structure; 9 is the 7th screw thread; 10 is the 4th hollow prism shape structure; 11 is the 5th screw thread; 12 is transition part; 13 is the 6th screw thread; 14 is the 3rd column structure; 15 is pentagonal prism shape structure; 16 is the 8th screw thread; 17 is the second bar portion; 18 is first handle; 19 is sleeve-like configuration; 20 is the 3rd bar portion; 21 is second handle.
Detailed description of the invention
Below in conjunction with accompanying drawing 10-12, population structure of the present invention is described in further detail.
Refer to Figure 11, Figure 11 is the combination schematic diagram in a state of use of I type assembly A and thread type lag screw D of the present invention.As shown in figure 11, a kind of thread type lag screw system wherein: comprise thread type lag screw D and I type assembly A.
Refer to Figure 12, Figure 12 is the combination schematic diagram in a state of use of II type assembly B and thread type lag screw D.As shown in figure 12, a kind of thread type lag screw system wherein: comprise thread type lag screw D and II type assembly B.
Refer to Figure 10, Figure 10 is the combination schematic diagram of thread type lag screw D, I type assembly A, the second assembly C and I type special screwdriver E.As shown in Figure 10, a kind of thread type lag screw system wherein: comprise thread type lag screw D and I type assembly A, also can comprise the second assembly C.
Below in conjunction with accompanying drawing 1-9, all parts is described in detail.
Refer to Fig. 1, Fig. 1 is the schematic front view of thread type lag screw D.As shown in Figure 1, thread type lag screw D is by the 3rd screw thread 1, first bar portion 2 and afterbody 3 form, its design is except screw afterbody 3, remaining design is equal to the design of the lag screw of current Clinical practice, afterbody 3 shape of described thread type lag screw D can be various, as hemispherical or cylindrical, pref. cylindrical, its outer surface has the 4th screw thread 4, described 4th screw thread 4 designs for anti-clockwise thread, that is: described 4th screw thread 4 is rotated counterclockwise each other with other screw threads, this motion makes described 4th screw thread 4 form with other screw threads the effect be connected, have hollow prism shape structure in the afterbody 3 of described thread type lag screw D, i.e. the second hollow prism shape structure 5, the shape of described second hollow prism shape structure 5 can be various, as plum blossom-shaped or prism-shaped, be preferably hexagonal prismoid shape hollow structure, it act as and mutually mates with I type special screwdriver E, to be screwed in skeleton or from skeleton by described thread type lag screw D to take out to make described I type special screwdriver E.
Refer to Fig. 2 and Fig. 3, wherein, Fig. 2 is the schematic front view of I type assembly A, and Fig. 3 is the volume rendering schematic diagram of I type assembly A.As shown in Figures 2 and 3, I type assembly A is the column of inner hollow, is made up of the first screw thread 6 and the second screw thread 7; Described first screw thread 6 is female thread, its pitch, diameter and the depth of thread equal the pitch of described 4th screw thread 4, diameter and the depth of thread, described first screw thread 6 and described 4th screw thread 4 negative relational matching, that is: be rotated counterclockwise described I type assembly A, described thread type lag screw D is connected with described I type assembly A; Described second screw thread 7 is external screw thread, and for anti-clockwise thread designs, that is: described second screw thread 7 is rotated counterclockwise each other with other screw threads, and this motion makes described second screw thread 7 form with other screw threads the effect be connected; Described I type assembly A inside is hollow structure, i.e. the first hollow structure 8, and the diameter of described first hollow structure 8 is not less than the diameter of the hollow prism shape structure 5 of the afterbody 3 of described thread type lag screw D.
Refer to Fig. 4 and Fig. 5, wherein, Fig. 4 is the schematic front view of II type assembly B, and Fig. 5 is the volume rendering schematic diagram of II type assembly B.As shown in Figures 4 and 5, II type assembly B is the hollow prism shape structure that one end is closed, its inside is provided with the 7th screw thread 9, the pitch of described 7th screw thread 9, diameter and the depth of thread equal the pitch of described 4th screw thread 4, diameter and the depth of thread, described 7th screw thread 9 and described 4th screw thread 4 negative relational matching, that is: be rotated counterclockwise described II type assembly B, described thread type lag screw D is connected with described II type assembly B; The surface texture of described II type assembly B is the prismatic structure that one end is closed, i.e. the 4th hollow prism shape structure 10, it act as and mutually mates with II type special screwdriver, is connected with the afterbody 3 of described thread type lag screw D to make described II type assembly B by described 4th screw thread 4 and described 7th screw thread 9.
Refer to Fig. 6 and Fig. 7, wherein, Fig. 6 is the schematic front view of the second assembly C, and Fig. 7 is the volume rendering schematic diagram of the second assembly C.As shown in FIG. 6 and 7, second assembly C is columnar hollow structure, its inside is by the 5th screw thread 11, form without screw thread transition part 12 and the 6th screw thread 13, the pitch of described 5th screw thread 11 is less than the pitch of described 6th screw thread 13, and the diameter of described 5th screw thread 11 is greater than the diameter of described 6th screw thread 13; The pitch of the pitch of described 5th screw thread 11, diameter and the depth of thread and described second screw thread 7, diameter and the depth of thread are identical, described 5th screw thread 11 and described second screw thread 7 negative relational matching, that is: be rotated counterclockwise described second assembly C, realize the connection of described second assembly C and described I type assembly A; Described 6th screw thread 13 designs for anti-clockwise thread, that is: described 6th screw thread 13 is rotated counterclockwise each other with other screw threads, and this motion makes described 6th screw thread 13 form with other screw threads the effect be connected; The external shape of described second assembly C is column structure, i.e. the 3rd column structure 14, and spanner acts on described 3rd column structure 14, and described second assembly C is moved.
Please continue to refer to the schematic front view that Fig. 8, Fig. 8 are I type special screwdriver E.As shown in Figure 8, I type special screwdriver E is by prismatic structure, i.e. pentagonal prism shape structure 15, 8th screw thread 16, second bar portion 17 and first handle 18 form, the shape of described pentagonal prism shape structure 15, the shape of the second hollow prism shape structure 5 contained in the afterbody 3 of diameter and described thread type lag screw D, diameter is identical, described pentagonal prism shape structure 15 is mated mutually with described second hollow prism shape structure 5, described pentagonal prism shape structure 15 also can be designed to other shapes, be preferably hexagonal prismoid shape structure, to make described I type special screwdriver E described thread type lag screw D is screwed in skeleton or from skeleton and takes out, the pitch of the pitch of described 8th screw thread 16, diameter and the depth of thread and described 6th screw thread 13, diameter and the depth of thread are identical, described 8th screw thread 16 and described 6th screw thread 13 negative relational matching, that is: described second assembly C is rotated counterclockwise, move between described 8th screw thread 16 and described 6th screw thread 13, realize the connection of described second assembly C and described I type special screwdriver E, the diameter in described second bar portion 17 is less than the diameter of described 5th screw thread 11, the 6th screw thread 13, the 8th screw thread 16, the diameter in described second bar portion 17 is less than the diameter of the transition part 12 of described second assembly C, be demountable between described second bar portion 17 and described first handle 18, described second bar portion 17 end is connected with described first handle 18.
Please continue to refer to the schematic front view that Fig. 9, Fig. 9 are II type special screwdriver F.As shown in figure Fig. 9, the endsocket spline structure of II type special screwdriver, namely sleeve-like configuration 19 matches with the 4th hollow prism shape structure 10 of described II type assembly B, described sleeve-like configuration 19 is enclosed within described 4th hollow prism shape structure 10, rotate second handle 21, revolving force is acted in described sleeve-like configuration 19 by the 3rd bar portion 20, described sleeve-like configuration 19 and the 4th hollow prism shape structure 10 of described II type assembly B is made to be rotated counterclockwise to make the afterbody 3 of described thread type lag screw D to be connected with described 7th screw thread 9 by described 4th screw thread 4 with described II type assembly B.
Specifically in conjunction with the use procedure about device of the present invention in fracture of femoral neck operation:
The first step: by standard procedures flow process, closed reduction fracture of femoral neck, it is good that perspective is shown in that fracture of femoral neck resets; Sterilization paving is single, and outside near end of thighbone, percutaneous squeezes into three Kirschner wire guide pins, and perspective confirms that the reduction of the fracture is good, three Kirschner wire guide pin length and position good; Turn by electro-medical and to punch through Kirschner wire and to measure the nail degree of depth, select the thread type lag screw of appropriate length according to the nail degree of depth recorded;
Second step: be screwed into described thread type lag screw D, is first connected described first screw thread 6 of I type assembly A with the 4th screw thread 4 of the afterbody 3 of described thread type lag screw D, avoids screwed tight in this process, then under the guiding of described I type assembly A, described thread type lag screw D is screwed in skeleton with suitable torsion by the pentagonal prism shape structure 15 in described I type special screwdriver E, by the afterbody 3 of described thread type lag screw D and being threaded of described I type assembly A, realize described I type assembly A at described I type special screwdriver E to the guide effect in described thread type lag screw D operation, make the axis of described I type special screwdriver E in all operations with the axis of described thread type lag screw D in line, the pentagonal prism shape structure 15 of described I type special screwdriver E is avoided to shake when acting on the second hollow prism shape structure 5 of afterbody 3 of described lag screw, at described I type special screwdriver E thread type lag screw is screwed into the second hollow prism shape structure 5 of lag screw afterbody 3 described in available protecting in the process of skeleton,
3rd step: described I type assembly A is taken off from the afterbody 3 of described thread type lag screw D, counterclockwise matched design between described first screw thread 6 of I type assembly A and the 4th screw thread 4 of the afterbody 3 of described thread type lag screw D, that is: the 4th screw thread 4 being rotated counterclockwise described I type assembly A is connected with between described first screw thread 6, the described I type assembly A that turns clockwise makes to be separated between described 44 screw thread with described first screw thread 6, the first screw thread 6 in conjunction with I type assembly A is not tightened with the 4th screw thread 4 of the afterbody 3 of thread type lag screw D, its beneficial effect produced is as follows: one, the afterbody 3 that clockwise torque acts on thread type lag screw D can not cause screw to occur to loosen in skeleton, two, available protecting the 4th screw thread 4, first screw thread 6,
4th step: mutually mated with the 4th hollow prism shape structure 10 of described II type assembly B by the sleeve-like configuration 19 of described II type special screwdriver F end, with described II type special screwdriver F, described II type assembly B is connected with the afterbody 3 of described thread type lag screw D, avoid overtorquing between described 4th screw thread 4 and described 7th screw thread 9 in this course, to avoid damaging described 4th screw thread 4, described 7th screw thread 9, prevent screw from occurring to loosen in skeleton; The object of described II type assembly B is the 4th screw thread 4 described in available protecting, avoids soft tissue and skeleton in the process of union of fracture to grow into the 4th screw thread 4 and the second hollow prism shape structure 5 of afterbody 3 of thread type lag screw D;
5th step: according to operation needs, continue to be screwed into this device and other inside-fixtures at suitable position, until reach expection therapeutic effect by identical flow process;
6th step: perspective confirms the reduction of the fracture and internal fixtion position well again, rinses wound surface and is seamed to skin successively after definite hemostasis.
Specifically be combined thread type lag screw fixed fracture of femoral neck, when taking out the use procedure about device of the present invention in thread type lag screw operation after union of fracture:
The first step: by standard procedures flow process, sterilization paving list also exposes the afterbody 3 of described thread type lag screw D and the II type assembly B on described afterbody 3 surface by standard procedures approach;
Second step: mutually mated with the 4th hollow prism shape structure 10 of described II type assembly B by the sleeve-like configuration 19 of described II type special screwdriver F end, under the effect of clockwise torque, described II type assembly B is taken out from the afterbody 3 of thread type lag screw D with described II type special screwdriver F, appear the 4th screw thread 4 of the afterbody 3 of described thread type lag screw D and described second hollow prism shape structure 5;
3rd step: for the ease of understanding, can consult Figure 10, Figure 10 is the combination schematic diagram of thread type lag screw D, I type assembly A, the second assembly C and I type special screwdriver E.As shown in Figure 10, described I type assembly A is connected by the 4th screw thread 4 of described first screw thread 6 with the afterbody 3 of described thread type lag screw D, makes described I type assembly A and described thread type lag screw D form an entirety, described I type special screwdriver E first hollow structure 8 in described I type assembly A is inserted, makes the second hollow prism shape structure 5 matched well of the afterbody 3 of described pentagonal prism shape structure 15 and described thread type lag screw D, take off the first handle 18 of described I type special screwdriver E, described second assembly C is connected with described I type assembly A after the 8th screw thread 16 of described I type special screwdriver E, then described first handle 18 is loaded onto, and push down described first handle 18, make between the bottom of the second hollow prism shape structure 5 of the described pentagonal prism shape structure 15 of I type special screwdriver E and the afterbody 3 of thread type lag screw D seamless, the 3rd column structure 14 of described second assembly C is acted on spanner, continue counterclockwise to rotate the axial pressure that described second assembly C realizes afterbody 3 direction towards described thread type lag screw D of described I type special screwdriver E, by described I type assembly A, described second assembly C makes described I type special screwdriver E and described thread type lag screw D form an entirety, the principle that this axial compressive force is formed is as follows: contact concurrent raw relative motion at described 6th screw thread 13 with described 8th screw thread 16 until described 5th screw thread 11 is with described second this process of screw thread 7 relative motion, described I type assembly A and described I type special screwdriver E keeps resting state, this move toward one another forms axial pressure, its mechanism description is as follows: when described 6th screw thread 13 rotates a circle with described 8th screw thread 16, described second screw thread 7 also rotates one with described 5th screw thread 11 and encloses, but because described 6th screw thread 13 and the pitch of described 8th screw thread 16 are greater than the pitch of described second screw thread 7 and described 5th screw thread 11, therefore described 6th screw thread 13 and described 8th screw thread 16 rotate distance that a circle advances and are greater than described second screw thread 7 and described 5th screw thread 11 and rotate the distance that a circle advances, described I type assembly A and described I type special screwdriver E keeps resting state, therefore described 6th screw thread 13, described 8th screw thread 16 and described second screw thread 7, the afterbody 3 causing described I type special screwdriver E to described thread type lag screw D moves by the range difference that described 5th screw thread 11 coaxial rotation produces, this motion by effectively maintain the described pentagonal prism shape structure 15 of I type special screwdriver E and the afterbody 3 of described thread type lag screw D the second hollow prism shape structure 5 bottom between gapless state, and form pressor effect between, this pressor effect produces double useful effect: one, make the second hollow prism shape structure 5 of described lag screw afterbody 3 mate more tight with the pentagonal prism shape structure 15 of described I type special screwdriver E, two, make to connect between the afterbody 3 of described thread type lag screw D and the 4th screw thread 4, first screw thread 6 of described II type assembly B form compressive stress, make to be connected second screw thread 7 of described I type assembly A and described second assembly C, the 5th screw thread 11 forms compressive stress and is connected between the 6th screw thread 13 of described second assembly C and described I type special screwdriver E, the 8th screw thread 16 and form compressive stress, compressive stress between this screw thread adds the frictional resistance between screw thread, is conducive to the stability between helicitic texture,
4th step: be rotated counterclockwise described I type special screwdriver E to take out described thread type lag screw D;
5th step: after taking out one piece of described thread type lag screw D, described I type assembly A, described second assembly C and described I type special screwdriver E are taken apart; According to operation needs, take out other thread type lag screw by identical flow process;
6th step: rinse wound surface and be seamed to skin successively after definite hemostasis.
It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (8)
1. a thread type lag screw system, comprise I type assembly (A) and thread type lag screw (D), described I type assembly (A) is the inner column in the first hollow structure (8), described I type assembly (A) one end is provided with the first screw thread (6), the other end is provided with the second screw thread (7), described first screw thread (6) is female thread, and described second screw thread (7) is external screw thread; Described thread type lag screw (D) is made up of the 3rd screw thread (1), the first bar portion (2) and afterbody (3), described first bar portion (2) one end is provided with the 3rd screw thread (1), the other end is provided with afterbody (3), described afterbody (3) outer surface is provided with the 4th screw thread (4), is provided with the second hollow prism shape structure (5) in described afterbody (3); Described I type assembly (A) is connected with described 4th screw thread (4) by described first screw thread (6) with described thread type lag screw (D), diameter, the pitch of the diameter of described first screw thread (6), pitch and the depth of thread and described 4th screw thread (4) are identical with the depth of thread, described first screw thread (6) and described 4th screw thread (4) negative relational matching; Described first screw thread (6), the second screw thread (7) and the 4th screw thread (4) are coaxial threaded,
It is characterized in that: described thread type lag screw system also comprises the second assembly (C), the outside of described second assembly (C) is the 3rd column structure (14), one end, inside of described second assembly (C) is provided with the 5th screw thread (11), the other end is provided with the 6th screw thread (13), is provided with transition part (12) between described 5th screw thread (11) and described 6th screw thread (13); Diameter, the pitch of the diameter of described 5th screw thread (11), pitch and the depth of thread and described second screw thread (7) are identical with the depth of thread, described 5th screw thread (11) and described second screw thread (7) negative relational matching; Described 5th screw thread (11), described 6th screw thread (13) and described second screw thread (7) are coaxial threaded.
Described thread type lag screw system also comprises II type assembly (B), described II type assembly (B) can be connected with described thread type lag screw (D) after described I type assembly (A) and described thread type lag screw (D) depart from, the 4th hollow prism shape structure (10) that described II type assembly (B) is closed for one end, the inside of described II type assembly (B) is provided with the 7th screw thread (9); Described II type assembly (B) is connected with described 4th screw thread (4) by described 7th screw thread (9) with described thread type lag screw (D), the diameter of described 7th screw thread (9) is identical with pitch with the diameter of described 4th screw thread (4) with pitch, described 7th screw thread (9) and described 4th screw thread (4) negative relational matching; Described 7th screw thread (9) and the 4th screw thread (4) are coaxial threaded.
2. thread type lag screw system according to claim 1, is characterized in that: described thread type lag screw (D) afterbody (3) shape is cylindrical or dome-type.
3. thread type lag screw system according to claim 1, is characterized in that: the first hollow structure (8) that described I type assembly (A) is inner is hexagonal prismoid shape hollow structure.
4. thread type lag screw system according to claim 1, it is characterized in that: the pitch of the 5th screw thread (11) described in described second assembly (C) is less than the pitch of described 6th screw thread (13), the diameter of described 5th screw thread (11) is greater than the diameter of described 6th screw thread (13).
5. the special composite screwdriver system of a thread type lag screw system according to claim 1, it is characterized in that: comprise I type special screwdriver (E), described I type special screwdriver (E) is by pentagonal prism shape structure (15), 8th screw thread (16), second bar portion (17) and first handle (18) composition, described second bar portion (17) one end connects described first handle (18), the other end connects described pentagonal prism shape structure (15), described second bar portion (17) is provided with described 8th screw thread (16) with the junction of described pentagonal prism shape structure (15), described 8th screw thread (16) is external screw thread, the diameter of described 6th screw thread (13) is identical with pitch with the diameter of the 8th screw thread (16) with pitch, described 6th screw thread (13) and the 8th screw thread (16) negative relational matching, described 6th screw thread (13) and described 8th screw thread (16) are coaxial threaded, the diameter of described pentagonal prism shape structure (15) is identical with shape with the diameter of described second hollow prism shape structure (5) with shape, and described pentagonal prism shape structure (15) is mated mutually with described second hollow prism shape structure (5).
6. special composite screwdriver system according to claim 5, is characterized in that: described pentagonal prism shape structure (15) is less than or equal to the diameter of described first hollow structure (8) with the diameter of described second hollow prism shape structure (5).
7. special composite screwdriver system according to claim 5, is characterized in that: the diameter in described second bar portion (17) is less than the diameter of described 5th screw thread (11), described 6th screw thread (13), described 8th screw thread (16) and described transition part (12).
8. special composite screwdriver system according to claim 5, it is characterized in that: also comprise II type special screwdriver (F), described II type special screwdriver (F) is made up of sleeve-like configuration (19), the 3rd bar portion (20) and second handle (21), described 3rd bar portion (20) one end connects described sleeve-like configuration (19), the other end connects described second handle (21), and described sleeve-like configuration (19) is mated mutually with described 4th hollow prism shape structure (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260161.XA CN103349565B (en) | 2013-06-25 | 2013-06-25 | Thread type lag screw system and special compound opener thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310260161.XA CN103349565B (en) | 2013-06-25 | 2013-06-25 | Thread type lag screw system and special compound opener thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103349565A CN103349565A (en) | 2013-10-16 |
| CN103349565B true CN103349565B (en) | 2015-01-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310260161.XA Expired - Fee Related CN103349565B (en) | 2013-06-25 | 2013-06-25 | Thread type lag screw system and special compound opener thereof |
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| Country | Link |
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| CN (1) | CN103349565B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114917009B (en) * | 2022-05-12 | 2022-10-25 | 中国人民解放军总医院第四医学中心 | Full-thread lag screw with enhanced mechanics |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN86209722U (en) * | 1986-11-29 | 1987-12-05 | 无锡第四人民医院 | Pressure nail with threaded ends and its auxiliary appliances used for the treatment of thighbone and cervical vertebra fracture |
| CN2586458Y (en) * | 2002-11-07 | 2003-11-19 | 付伟 | Tensile threaded needle with lock |
| US20050216027A1 (en) * | 2004-03-24 | 2005-09-29 | Suh Sean S | Extraction screwdriver |
| US7604643B2 (en) * | 2004-04-06 | 2009-10-20 | Synthes Usa, Llc | Adjustable tool for cannulated fasteners |
| EP2236101B1 (en) * | 2009-04-03 | 2015-07-08 | Stryker Trauma GmbH | Sonic screw |
| CN102319103B (en) * | 2011-09-15 | 2013-11-20 | 徐达强 | Pressurized locking combined screw system and special composite screwdriver |
| CN102406516B (en) * | 2011-09-15 | 2013-06-12 | 徐达强 | Pressurized combination screw capable of quantizing torsion and composite screwdriver thereof |
| CN202682036U (en) * | 2012-03-31 | 2013-01-23 | 翟延荣 | Wire sliding prevention bolt and hollow locking screwdriver matched with the same |
| CN203291001U (en) * | 2013-06-25 | 2013-11-20 | 建湖县人民医院 | Thread type lag screw system and special composite screw driver thereof |
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2013
- 2013-06-25 CN CN201310260161.XA patent/CN103349565B/en not_active Expired - Fee Related
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| CN103349565A (en) | 2013-10-16 |
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