CN2824859Y - Universal screw assembly for orthopaedical inner implantation - Google Patents
Universal screw assembly for orthopaedical inner implantation Download PDFInfo
- Publication number
- CN2824859Y CN2824859Y CN 200520072877 CN200520072877U CN2824859Y CN 2824859 Y CN2824859 Y CN 2824859Y CN 200520072877 CN200520072877 CN 200520072877 CN 200520072877 U CN200520072877 U CN 200520072877U CN 2824859 Y CN2824859 Y CN 2824859Y
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- screw
- hole
- hold
- down ring
- screw base
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Abstract
The utility model discloses universal screw assemblies for orthopaedical inner implantation, which comprise screw seats (1) which are made according to the prior art, pressing nuts (2), connecting rods (3), pressing rings (4) and screws (5). The utility model is characterized in that the universal screw assemblies for orthopaedical inner implantation are assembled according to the existing technical assembling relation; the outer circle of the pressing rings (4) is provided with a section of button grooves (4-4); the corresponding positions of the screw seats (1) and the button grooves (4-4) are provided with via holes (1-8); brake keys (1-9) which are arranged inside the via holes (1-8) are matched with the button grooves and are used for stopping the movement and rotation of the pressing rings (4). The utility model overcomes the defects of the prior art that the positions of the pressing rings need to be adjusted in the operating period, the anastomosis of the screws, the screw seats and the pressing rings are unstable, etc. The utility model has the characteristics of reasonable structure, no replacement of the pressing rings, simplification of operation, short operating time, etc.
Description
Technical field
This utility model relates to a kind of orthopaedics and is implanted into universal screw assembly, belongs to medical device technology.
Background technology
The alleged orthopaedics of this utility model is implanted into universal screw assembly, is the universal screw assembly that is specially adapted to treat lumbar spondylolisthesis.
Existing orthopaedics is implanted into universal screw assembly, comprise: a screw base, said screw base is provided with through hole vertically, be provided with one section screw on the top of through hole, 180 ° respectively have one section symmetric side cut parallel to each other between the top of screw base is along the circumferential direction mutual, respectively be provided with one section symmetric each other open slot that connects with inner bolt hole at said side cut position, be provided with the spheroidal inner cavity that is connected with the through hole transition at the bead position of screw base lower end, be provided with the annular groove that fractures of the screw base that when operation finishes, is used for fractureing at the interlude position of screw base; One clamp nut, said clamp nut and screw are twisted and to be connect, and being axially arranged with to be complementary with spanner of clamp nut is used for the hole of turn clamp nut; One pitman, said pitman are located in the open slot and are positioned at the below of clamp nut; One hold-down ring, said hold-down ring is located in the through hole and is positioned at the below of pitman, hold-down ring is provided with through hole, be provided with the inner recess that can match with pitman at bead position, the upper end of hold-down ring, be provided with in the lower end edge oral area position of hold-down ring and the inner cavity of screw base spheroidal inner recess with radius; One screw, the upper end of said screw is provided with the spherosome head that the inner recess with the inner cavity of screw base and hold-down ring matches, being provided with in the upper end of spherosome head is complementary with spanner is used for the blind hole of turn screw, and said spherosome head is located in inner cavity and the inner recess and can universally rotates.Prior art is because its hold-down ring is in complete free state, both can move vertically, also can rotate, thereby in operation process, after tightening a plurality of screws or claiming nail, in the time of need installing pitman additional, just must stir the position of adjusting hold-down ring, its inner recess and pitman of being located at upper end edge oral area position are matched, will increase trouble to operation like this, prolong operating time.Especially because the residing position of hold-down ring is more hidden, the working place that exists around it is very little, thereby to stir the operation of adjusting the hold-down ring position be very difficult.
Summary of the invention
Technical problem to be solved in the utility model is, can not move and rotate after a kind of hold-down ring set positions is provided, and when installing pitman additional, need not stir the orthopaedics of adjusting the hold-down ring position and be implanted into universal screw assembly, to overcome the deficiency of prior art.
This utility model realizes that the technical scheme of its purpose is, a kind of orthopaedics is implanted into universal screw assembly, comprise: a screw base, said screw base is provided with through hole vertically, be provided with one section screw on the top of through hole, 180 ° respectively have one section symmetric side cut parallel to each other between the top of screw base is along the circumferential direction mutual, respectively be provided with one section symmetric each other open slot that connects with screw at said side cut position, be provided with the spheroidal inner cavity that is connected with the through hole transition at the bead position of screw base lower end, be provided with the annular groove that fractures of the screw base that when operation finishes, is used for fractureing at the interlude position of screw base; One clamp nut, said clamp nut and screw are twisted and to be connect, and being axially arranged with to be complementary with spanner of clamp nut is used for the hole of turn clamp nut; One pitman, said pitman are located in the open slot and are positioned at the below of clamp nut; One hold-down ring, said hold-down ring is located in the through hole and is positioned at the below of pitman, hold-down ring is provided with through hole, be provided with the inner recess that can match with pitman at bead position, the upper end of hold-down ring, be provided with in the lower end edge oral area position of hold-down ring and the inner cavity of screw base spheroidal inner recess with radius; One screw, the upper end of said screw is provided with the spherosome head that the inner recess with the inner cavity of screw base and hold-down ring matches, being provided with in the upper end of spherosome head is complementary with spanner is used for the blind hole of turn screw, said spherosome head is located in inner cavity and the inner recess and can universally rotates, and its improvement is: be axially arranged with a paragraph key groove in the cylindrical upper edge of hold-down ring; Screw base be provided with through hole with the corresponding position of keyway, in through hole, be provided with the brake key preventing hold-down ring to move and rotate of being used for the keyway phase configuration.
Can understand that by above given technical scheme this utility model has effectively been prevented moving and rotating of hold-down ring, thereby realized the purpose of this utility model owing between its hold-down ring and screw base, be provided with the matching pair of key and keyway.
The further improvement of the utility model point is:
For simplified structure, to save the production cost of key and simplify the consideration of general assembly program, said brake key is the boss that the inner peripheral with through hole fuses mutually.That is to say that said through hole is a blind hole, and the degree of depth of blind hole is slightly less than the degree of depth of said through hole, for example the little 0.5～1mm of the degree of depth of the said through hole of depth ratio of blind hole.The thickness that will be present at the bottom of the said blind hole with drift when general assembly is the blind hole bottom of 0.5～1mm, is washed into the boss that extends and fuse mutually with the through hole inner peripheral to said keyway, thereby constitutes the protruding key with said keyway phase configuration.
On the sphere of the spherosome head of screw, be provided with the shallow table groove that is used for increasing the anastomotic position damping.Its purpose obviously is further to improve the stability of coincideing mutually between the spheroidal inner recess of the spheroidal inner cavity of the ball head body of screw and screw base and hold-down ring, avoid producing relative displacement between back, screw underwent operative location and screw base and the hold-down ring, to further facilitate the enforcement of operation.
Be positioned at the position, side cut plane of open slot both sides at screw base, be provided with and be used for cooperating the small rut that slippage lumbar vertebra body is resetted with special-purpose resetting tool; On the cylindrical of screw base mutually between 180 ° be provided with and be used for cooperating the big pit that slippage lumbar vertebra body is resetted with special-purpose resetting tool.Its purpose obviously is further to improve the special-purpose resetting tool of operation, and stability that combines with this utility model and reliability are effectively avoided the slippage at position that combines with this utility model of special-purpose resetting tool, thereby further facilitates the enforcement of operation.
After technique scheme was implemented, what this utility model had was rational in infrastructure, can not produce after the hold-down ring set positions to move and rotate, and need not stir when installing pitman additional and adjust the hold-down ring position; Characteristics such as it is easy to perform the operation, and operating time is relatively short are conspicuous.
Description of drawings
Fig. 1 is the front view of a kind of specific embodiment of this utility model.Be that the screw pendulum angle is circumferential 30 ° state shown in the fine line among the figure;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the A-A profile (part) of Fig. 1.
The specific embodiment
By above given accompanying drawing, can understand the technical solution of the utility model.Below in conjunction with the description of accompanying drawing by the specific embodiment, the utility model is described in further detail.
One of specific embodiment, ginseng is read accompanying drawing 1,2,3.A kind of orthopaedics is implanted into universal screw assembly, comprise: a screw base 1, said screw base 1 is provided with through hole 1-1 vertically, be provided with one section screw 1-2 on the top of through hole 1-1,180 ° respectively have one section symmetric side cut 1-3 parallel to each other between the top of screw base 1 is along the circumferential direction mutual, 1-4, at said side cut 1-3, the 1-4 position respectively is provided with one section symmetric each other open slot 1-5 that connects with screw 1-2,1-6, be provided with the spheroidal inner cavity 1-7 that is connected with through hole 1-1 transition at the bead position of screw base 1 lower end, be provided with the annular groove 1-12 that fractures of the screw base 1 that when operation finishes, is used for fractureing at the interlude position of screw base 1; One clamp nut 2, said clamp nut 2 are twisted with screw 1-2 and are connect, and being axially arranged with to be complementary with the outer-hexagonal spanner of clamp nut 2 is used for the inner hexagonal hole 2-1 of turn clamp nut 2; One pitman 3, said pitman 3 are located in open slot 1-5, the 1-6 and are positioned at the below of clamp nut 2; One hold-down ring 4, said hold-down ring 4 is located in the through hole 1-1 and is positioned at the below of pitman 3, hold-down ring 4 is provided with through hole 4-3, be provided with the inner recess 4-1 that can match with pitman 3 at bead position, the upper end of hold-down ring 4, be provided with the spheroidal inner recess 4-2 with radius in the lower end edge oral area position of hold-down ring 4 with the inner cavity 1-7 of screw base 1; One screw 5, the upper end of said screw 5 is provided with the spherosome head 5-1 that the inner recess 4-2 with the inner cavity 1-7 of screw base 1 and hold-down ring 4 matches, being provided with in the upper end of spherosome head 5-1 is complementary with the outer-hexagonal spanner is used for the interior hexagonal blind hole 5-1-2 of turn screw 5, said spherosome head 5-1 is located in inner cavity 1-7 and the inner recess 4-2 and can universally rotates, be axially arranged with a paragraph key groove 4-4 in the cylindrical upper edge of hold-down ring 4, said keyway 4-4 have 2 and mutually between 180 ° of symmetric arrangement; Screw base 1 be provided with through hole 1-8 with the corresponding position of keyway 4-4, in through hole 1-8, be provided with the brake key 1-9 that prevents hold-down ring 4 to move and rotate of being used for keyway 4-4 phase configuration.On the sphere of the spherosome head 5-1 of screw 5, be provided with the shallow table groove 5-1-1 that is used for increasing the anastomotic position damping.Be positioned at the position, plane of side cut 1-3, the 1-4 of open slot 1-5,1-6 both sides at screw base 1, respectively be provided with 4 and be used for cooperating the small rut 1-10 that slippage lumbar vertebra body is resetted with special-purpose resetting tool; On the cylindrical of screw base 1 mutually between 180 ° respectively be provided with 2 and be used for cooperating the big pit 1-11 that slippage lumbar vertebra body is resetted with special-purpose resetting tool.
Said brake key 1-9 is the straight pin that has with the conehead of said keyway 4-3 phase configuration.Said cylinder pin key 1-9 and through hole 1-8 are tight fit.In the hope of definitely preventing cylinder pin key 1-9, may be in operation process or after operation, from said through hole 1-8, come off and the accident that produces.
Specifically buy two of the mode of executing, as shown in Figure 1, 2, 3.A kind of orthopaedics is implanted into universal screw assembly, comprise: a screw base 1, said screw base 1 is provided with through hole 1-1 vertically, be provided with one section screw 1-2 on the top of through hole 1-1,180 ° respectively have one section symmetric side cut 1-3 parallel to each other between the top of screw base 1 is along the circumferential direction mutual, 1-4, at said side cut 1-3, the 1-4 position respectively is provided with one section symmetric each other open slot 1-5 that connects with screw 1-2,1-6, be provided with the spheroidal inner cavity 1-7 that is connected with through hole 1-1 transition at the bead position of screw base 1 lower end, be provided with the annular groove 1-12 that fractures of the screw base 1 that when operation finishes, is used for fractureing at the interlude position of screw base 1; One clamp nut 2, said clamp nut 2 are twisted with screw 1-2 and are connect, and being axially arranged with to be complementary with the outer-hexagonal spanner of clamp nut 2 is used for the inner hexagonal hole 2-1 of turn clamp nut 2; One pitman 3, said pitman 3 are located in open slot 1-5, the 1-6 and are positioned at the below of clamp nut 2; One hold-down ring 4, said hold-down ring 4 is located in the through hole 1-1 and is positioned at the below of pitman 3, hold-down ring 4 is provided with through hole 4-3, be provided with the inner recess 4-1 that can match with pitman 3 at bead position, the upper end of hold-down ring 4, be provided with the spheroidal inner recess 4-2 with radius in the lower end edge oral area position of hold-down ring 4 with the inner cavity 1-7 of screw base 1; One screw 5, the upper end of said screw 5 is provided with the spherosome head 5-1 that the inner recess 4-2 with the inner cavity 1-7 of screw base 1 and hold-down ring 4 matches, being provided with in the upper end of spherosome head 5-1 is complementary with the outer-hexagonal spanner is used for the interior hexagonal blind hole 5-1-2 of turn screw 5, said spherosome head 5-1 is located in inner cavity 1-7 and the inner recess 4-2 and can universally rotates, be axially arranged with a paragraph key groove 4-4 in the cylindrical upper edge of hold-down ring 4, said keyway 4-4 have 2 and mutually between 180 ° of symmetric arrangement; Screw base 1 be provided with through hole 1-8 with the corresponding position of keyway 4-4, in through hole 1-8, be provided with the brake key 1-9 that prevents hold-down ring 4 to move and rotate of being used for keyway 4-4 phase configuration.Said brake key 1-9 is the boss that the inner peripheral with through hole 1-8 fuses mutually.On the sphere of the spherosome head 5-1 of screw 5, be provided with the shallow table groove 5-1-1 that is used for increasing the anastomotic position damping.Be positioned at the position, plane of side cut 1-3, the 1-4 of open slot 1-5,1-6 both sides at screw base 1, respectively be provided with 4 and be used for cooperating the small rut 1-10 that slippage lumbar vertebra body is resetted with special-purpose resetting tool; The cylindrical both sides of screw base 1 mutually between 180 ° respectively be provided with 2 and be used for cooperating the big pit 1-11 that slippage lumbar vertebra body is resetted with special-purpose resetting tool.
Sampling effect of the present utility model is good.
This utility model is specially adapted to treat lumbar spondylolisthesis, and being widely used in other simultaneously need be that nail passes through the banded operative site of pitman by a plurality of screws.
Claims (4)
1, a kind of orthopaedics is implanted into universal screw assembly, comprise: a screw base (1), said screw base (1) is provided with through hole (1-1) vertically, be provided with one section screw (1-2) on the top of through hole (1-1), 180 ° respectively have one section symmetric side cut (1-3 parallel to each other between the top of screw base (1) is along the circumferential direction mutual, 1-4), at said side cut (1-3,1-4) position respectively is provided with one section symmetric each other open slot (1-5 that connects with screw (1-2), 1-6), be provided with the spheroidal inner cavity (1-7) that is connected with through hole (1-1) transition at the bead position of screw base (1) lower end, be provided with the annular groove that fractures (1-12) of the screw base (1) that when operation finishes, is used for fractureing at the interlude position of screw base (1); One clamp nut (2), said clamp nut (2) and screw (1-2) are twisted and are connect, and being axially arranged with to be complementary with spanner of clamp nut (2) is used for the hole (2-1) of turn clamp nut (2); One pitman (3), said pitman (3) are located in the open slot (1-5,1-6) and are positioned at the below of clamp nut (2); One hold-down ring (4), said hold-down ring (4) is located in the through hole (1-1) and is positioned at the below of pitman (3), hold-down ring (4) is provided with through hole (4-3), be provided with the inner recess (4-1) that can match with pitman (3) at the bead position, upper end of hold-down ring (4), be provided with in the lower end edge oral area position of hold-down ring (4) and the inner cavity (1-7) of screw base (1) spheroidal inner recess (4-2) with radius; One screw (5), the upper end of said screw (5) is provided with the spherosome head (5-1) that the inner recess (4-2) with the inner cavity (1-7) of screw base (1) and hold-down ring (4) matches, being provided with in the upper end of spherosome head (5-1) is complementary with spanner is used for the blind hole (5-1-2) of turn screw (5), said spherosome head (5-1) is located in inner cavity (1-7) and the inner recess (4-2) and can universally rotates, and it is characterized in that: be axially arranged with a paragraph key groove (4-4) in the cylindrical upper edge of hold-down ring (4); Screw base (1) be provided with through hole (1-8) with the corresponding position of keyway (4-4), in through hole (1-8), be provided with the brake key (1-9) preventing hold-down ring (4) to move and rotate of being used for keyway (4-4) phase configuration.
2, orthopaedics according to claim 1 is implanted into universal screw assembly, it is characterized in that: said brake key (1-9) is the boss that the inner peripheral with through hole (1-8) fuses mutually.
3, orthopaedics according to claim 1 is implanted into universal screw assembly, it is characterized in that: on the sphere of the spherosome head (5-1) of screw (5), be provided with the shallow table groove (5-1-1) that is used for increasing the anastomotic position damping.
4, orthopaedics according to claim 1 is implanted into universal screw assembly, it is characterized in that: be positioned at the position, side cut plane of open slot (1-5,1-6) both sides at screw base (1), be provided with and be used for cooperating the small rut (1-10) that slippage lumbar vertebra body is resetted with special-purpose resetting tool; On the cylindrical of screw base (1) mutually between 180 ° be provided with and be used for cooperating the big pit (1-11) that slippage lumbar vertebra body is resetted with special-purpose resetting tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072877 CN2824859Y (en) | 2005-06-17 | 2005-06-17 | Universal screw assembly for orthopaedical inner implantation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520072877 CN2824859Y (en) | 2005-06-17 | 2005-06-17 | Universal screw assembly for orthopaedical inner implantation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2824859Y true CN2824859Y (en) | 2006-10-11 |
Family
ID=37065041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520072877 Expired - Lifetime CN2824859Y (en) | 2005-06-17 | 2005-06-17 | Universal screw assembly for orthopaedical inner implantation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2824859Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884564A (en) * | 2010-07-21 | 2010-11-17 | 青岛大学医学院附属医院 | Orthopedic assembly type steel plate screw fixing system |
| CN102008348A (en) * | 2011-01-10 | 2011-04-13 | 南方医科大学 | Steel plate screw system with universal locking screws |
-
2005
- 2005-06-17 CN CN 200520072877 patent/CN2824859Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101884564A (en) * | 2010-07-21 | 2010-11-17 | 青岛大学医学院附属医院 | Orthopedic assembly type steel plate screw fixing system |
| CN102008348A (en) * | 2011-01-10 | 2011-04-13 | 南方医科大学 | Steel plate screw system with universal locking screws |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150617 Granted publication date: 20061011 |