CN206792473U - A kind of intercondylar ridge internal fixation hollow screw detachably taken out - Google Patents
A kind of intercondylar ridge internal fixation hollow screw detachably taken out Download PDFInfo
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- CN206792473U CN206792473U CN201720024878.8U CN201720024878U CN206792473U CN 206792473 U CN206792473 U CN 206792473U CN 201720024878 U CN201720024878 U CN 201720024878U CN 206792473 U CN206792473 U CN 206792473U
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Abstract
A kind of intercondylar ridge internal fixation hollow screw detachably taken out, belongs to orthopedic medical device technical field, for neck of femur Intercondylar fracture to be fixed.Its technical scheme is：Its tapping screw head has the six prismatic connecting holes along axis direction, the endoporus front end of hollow screw bar is six prismatic holes, the connecting hole with tapping screw head, six prismatic holes of endoporus front end of hollow screw bar match connection respectively at the both ends of connecting rod, hole is grown into the middle part of hollow screw bar, it is the elongated hole along the length direction of hollow screw bar to grow into hole, multiple circumference equidistant arrangements for growing into orifice ring around hollow screw bar, each both sides long side edge for growing into hole is sharp chamfering, and the baseplane of chamfering is intersected with the inner hole wall of hollow screw bar.The utility model can allow bone trabecula while enter in the hollow screw of interior fixation to grow in fracture site synthetism growth period, play bionical effect, patient can be allowd to carry out functional training earlier, shorten recovery time.
Description
Technical field
A kind of internal fixation screw that femoral intercondylar ridge fracture is fixed is the utility model is related to, belongs to orthopaedic medical treatment device
Tool technical field.
Background technology
Internal fixation treatment is a kind of irreplaceable important method in treatment femoral intercondylar ridge fracture, and hollow screw is fixed
Intercondylar eminence fracture operation technique is easy, and topography separation is less, and operating time is short, simultaneously because its chorista is few, otch
It is small, therefore intraoperative hemorrhage is less, perioperative blood transfusion number of cases and transfusion volume are less.Due to the long bone of limbs both ends of human body, vertebra, calcaneum
Deng having important trabecular bone structure in bone cancellous bone, to maintaining bone normal morphology and mechanotransduction to play a crucial role.But
Inside-fixture is implanted into after fracture can further destroy trabecular bone structure, and the presence of inside-fixture can hinder bone trabecula in union
During rebuild, it is impossible to effectively recover bone part normal configuration and mechanotransduction performance, stress raisers may be caused, made
Loosen, exit into inside-fixture, being broken, nonunion, the complication such as inside-fixture surrounding fracture.Therefore interior fixation is being used
, must also second operation taking-up inside-fixture after union when art is treated to Intercondylar fracture.Because inside-fixture influences bone
The recovery of fracture site during folding healing, therefore how to reduce this influence and promote the recovery as early as possible of fracture site, shorten and suffer from
The time of person's recovery from illness is current urgent problem to be solved.
Utility model content
Technical problem to be solved in the utility model is to provide a kind of intercondylar ridge internal fixation hollow spiral shell detachably taken out
Nail, this hollow screw can allow bone trabecula to enter growth in hollow screw, increase the intensity of fracture site, promote fracture as early as possible
Recover, shorten treatment time.
Solve above-mentioned technical problem technical scheme be：
A kind of intercondylar ridge internal fixation hollow screw detachably taken out, it includes tapping screw head, connecting rod, hollow screw
Bar, tapping screw head have the connecting hole along axis direction, and connecting hole is six prismatic holes, and the endoporus front end of hollow screw bar is six
Prismatic hole, the outer wall of connecting rod are six prisms, the both ends of the connecting rod connecting hole with tapping screw head, hollow screw bar respectively
The outer wall at the six prismatic holes matching connection of endoporus front end, hollow screw bar front end and middle part is cylindrical, after hollow screw bar
End outer wall is hexagon, and hole is grown into the middle part of hollow screw bar, and it is along the length direction of hollow screw bar to grow into hole
Elongated hole, multiple circumference equidistant arrangements for growing into orifice ring around hollow screw bar, the both sides long side edge for each growing into hole are sharp
Chamfering, the baseplane of chamfering are intersected with the inner hole wall of hollow screw bar.
The above-mentioned intercondylar ridge internal fixation hollow screw detachably taken out, the circumference of the circular hollow screw bar grow into hole and are
4-20, the width for each growing into hole is 1-3mm.
The above-mentioned intercondylar ridge internal fixation hollow screw detachably taken out, the diameter of bore of the hollow screw bar is hollow spiral shell
1/3-the 1/4 of nail rod external diameter, the inner hole wall of endoporus rear end is hexagon.
The above-mentioned intercondylar ridge internal fixation hollow screw detachably taken out, it also has matching used screwdriver, the front end of screwdriver
There is a groove perpendicular to screwdriver front end face, groove is hexagon, six prism phases of hexagon and hollow screw bar rear portion outer wall
Match somebody with somebody, the hexagon side wall of groove is vertical with screwdriver end face, the depth of groove and six prism length of hollow screw bar rear portion outer wall
Match, groove center has the rotating bar of hexagon section, hexagon section and the hollow screw rod rear end inner hole wall of rotating bar
Hexagon match.
The beneficial effects of the utility model are：
The utility model is the Split type structure of tapping screw head, connecting rod and hollow screw bar composition, facilitates hollow screw
The taking-up of bar；Have on hollow screw bar it is multiple grow into hole, bone trabecula can be along the endoporus for growing into hole and entering hollow screw bar
Middle growth, play bionical effect.
The utility model is that hollow screw fixes the pioneering of Intercondylar fracture operation, can hollow screw squeeze into intercondylar ridge with
Afterwards, the 4-20 that directly can be grown into along the compression trabeculae of vertical direction or diagonal on hollow screw circumference hollow grow into hole it
In, bionical effect is played, patient can be allowd to carry out functional training earlier, shortens recovery time.Taking out hollow spiral shell
During nail, because fracture site is recovered, hollow screw is taken out and fracture and sclerotin will not be impacted.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is Fig. 1 B-B sectional views；
Fig. 4 is the structural representation of screwdriver.
Marked in figure as follows：Tapping screw is first 1, connecting rod 2, hollow screw bar 3, connecting hole 4, endoporus 5, grows into hole 6, falls
Angle 7, screwdriver 8, groove 9, rotating bar 10.
Embodiment
Fig. 1 shows, the utility model is by tapping screw is first 1, connecting rod 2, hollow screw bar 3, screwdriver 8 form.
Fig. 2 shows that tapping screw first 1 has the connecting hole 4 along axis direction, and connecting hole 4 is six prismatic holes, for connecting
Extension bar 2 is connected.
Fig. 1,2 displays, the front end of endoporus 5 of hollow screw bar 3 is six prismatic holes, and the outer wall of connecting rod 2 is six prisms, connection
The connecting hole 4 with tapping screw first 1, six prismatic holes of the front end of endoporus 5 of hollow screw bar 3 match connection respectively at the both ends of bar 2.
Hollow screw bar 3 is rotated, hollow screw bar 3 will drive tapping screw first 1 to rotate, screw in sclerotin by connecting rod 2.
The outer wall at Fig. 1,2 displays, the front end of hollow screw bar 3 and middle part is cylinder, and the rear end outer wall of hollow screw bar 3 is
Hexagon, for being connected with screwdriver 8, hollow screw bar 3 is rotated by screwdriver 8.
Fig. 1,2,3 show that the middle part of hollow screw bar 3 grows into hole 6, and it is the length along hollow screw bar 3 to grow into hole 6
The elongated hole in direction, multiple circumference equidistant arrangements for growing into hole 6 around hollow screw bar 3.It is to make bone small to set the purpose for growing into hole 6
Beam is grown along growing into the endoporus 5 that hole 6 enters hollow screw bar 3.
Fig. 3 shows that the both sides long side edge for each growing into hole 6 is sharp chamfering 7, the baseplane of chamfering 7 and hollow spiral shell
The inner hole wall of nail rod 3 intersects.During hollow screw bar 3 is taken out, bone that the tip portion of chamfering 7 will can be grown into hole 6
Matter is cut, to take out hollow screw bar 3.When taking out hollow screw, because fracture site is recovered, hollow screw is taken
Fracture and sclerotin will not be impacted when going out.
Fig. 1,2,3 are shown, grow into hole around the circumference of hollow screw bar as 4-20, the width for each growing into hole is 1-
3mm。
Fig. 1,2,3 show, 1/3-the 1/4 of a diameter of external diameter of hollow screw bar 3 of endoporus 5 of hollow screw bar 3, after endoporus
The inner hole wall at end is hexagon.
Fig. 4 shows, there is a groove 9 perpendicular to the front end face of screwdriver 88 front ends of screwdriver, and groove 9 is hexagon, hexagon with
Six prisms of the rear portion outer wall of hollow screw bar 3 match, and the hexagon side wall of groove 9 is vertical with the end face of screwdriver 8, the depth of groove 9
Spend and match with six prism length of the rear portion outer wall of hollow screw bar 3.There is the rotating bar 10 of hexagon section at the center of groove 9, turns
The hexagon of the hexagon section of lever 10 and the rear end inner hole wall of hollow screw bar 3 matches.During using screwdriver 8, before screwdriver 8
The groove 9 at end is enclosed on six prisms of the rear portion outer wall of hollow screw bar 3, and rotating bar 10 is inserted into the rear end endoporus of hollow screw bar 3
In the hexagon of wall, the handle for rotating screwdriver 8 is rotatable hollow screw bar 3.
Application method of the present utility model is as follows：
By the both ends of connecting rod 2 respectively the connecting hole 4 with tapping screw first 1, hollow screw bar 3 the front end of endoporus 5 six
Prismatic hole matching connection.Then the groove 9 of the front end of screwdriver 8 is enclosed on six prisms of the rear portion outer wall of hollow screw bar 3, screwdriver 8
The rotating bar at the center of groove 9 be inserted into the hexagon of the rear end inner hole wall of hollow screw bar 3,.
Two layers of cortex of intercondylar ridge is squeezed into using guide pin, all beats, then hollow screw is set on guide pin, squeezes into condyle
Between ridge, guide pin is taken out after squeezing into.Tapping screw first 1 is directed at sclerotin position, the handle for rotating screwdriver 8 is rotatable hollow
Shank of screw 3, hollow screw bar 3 will drive tapping screw first 1 rotate, screw in sclerotin, most hollow spiral shell at last by connecting rod 2
The tapping screw first 1 of nail passes contralateral cortex.Treat that screw thread all passes after producing cortex, tapping screw head is directly removed from offside
1.There is the 2-5mm threaded region that do not have behind the threaded part of tapping screw head, be so connected with hollow screw below
Later, above all threaded parts are being passed from offside, you can remove screw head, and can be arranged as required to
The depth that hollow screw enters.
When taking out hollow screw, rotated after screwdriver 8 is connected with hollow screw bar 3, hollow screw bar 3 grows into hole
The tip portion of 6 chamfering 7 can cut away the sclerotin grown into hole 6, pull out hollow screw bar 3.Taking out hollow spiral shell
During nail, because fracture site is recovered, fracture and sclerotin will not be impacted when hollow screw is taken out.
Claims (4)
- A kind of 1. intercondylar ridge internal fixation hollow screw detachably taken out, it is characterised in that：It includes tapping screw head（1）, even Extension bar（2）, hollow screw bar（3）, tapping screw head（1）There is the connecting hole along axis direction（4）, connecting hole（4）For six ribs Shape hole, hollow screw bar（3）Endoporus（5）Front end is six prismatic holes, connecting rod（2）Outer wall be six prisms, connecting rod（2）'s Both ends respectively with tapping screw head（1）Connecting hole（4）, hollow screw bar（3）Endoporus（5）The six prismatic holes matching of front end connects Connect, hollow screw bar（3）The outer wall at front end and middle part is cylindrical, hollow screw bar（3）Rear end outer wall be hexagon, it is empty Heart shank of screw（3）Middle part grow into hole（6）, grow into hole（6）For along hollow screw bar（3）Length direction elongated hole, it is more It is individual to grow into hole（6）Around hollow screw bar（3）Circumference equidistant arrangement, each grow into hole（6）Both sides long side edge be sharp Chamfering（7）, chamfering（7）Baseplane and hollow screw bar（3）Inner hole wall intersect.
- 2. the intercondylar ridge internal fixation hollow screw according to claim 1 detachably taken out, it is characterised in that：It is described to surround Hollow screw bar（3）Circumference grow into hole（6）For 4-20, hole is each grown into（6）Width be 1-3mm.
- 3. the intercondylar ridge internal fixation hollow screw according to claim 2 detachably taken out, it is characterised in that：It is described hollow Shank of screw（3）Endoporus（5）A diameter of hollow screw bar（3）1/3-the 1/4 of external diameter, endoporus（5）The inner hole wall of rear end is six sides Shape.
- 4. the intercondylar ridge internal fixation hollow screw according to claim 3 detachably taken out, it is characterised in that：It, which also has, matches somebody with somebody Cover the screwdriver used（8）, screwdriver（8）Front end have perpendicular to screwdriver（8）The groove of front end face（9）, groove（9）For hexagon, Hexagon and hollow screw bar（3）Six prisms of rear portion outer wall match, groove（9）Hexagon side wall and screwdriver（8）End face Vertically, groove（9）Depth and hollow screw bar（3）Six prism length of rear portion outer wall match, groove（9）There are six sides at center The rotating bar of tee section（10）, rotating bar（10）Hexagon section and hollow screw bar（3）The hexagon phase of rear end inner hole wall Matching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720024878.8U CN206792473U (en) | 2017-01-10 | 2017-01-10 | A kind of intercondylar ridge internal fixation hollow screw detachably taken out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720024878.8U CN206792473U (en) | 2017-01-10 | 2017-01-10 | A kind of intercondylar ridge internal fixation hollow screw detachably taken out |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206792473U true CN206792473U (en) | 2017-12-26 |
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ID=60728153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720024878.8U Active CN206792473U (en) | 2017-01-10 | 2017-01-10 | A kind of intercondylar ridge internal fixation hollow screw detachably taken out |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206792473U (en) |
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2017
- 2017-01-10 CN CN201720024878.8U patent/CN206792473U/en active Active
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