CN103431903A - Anti-loose screw plug, spine screw rod fixation device and spine screw rod fixation system - Google Patents
Anti-loose screw plug, spine screw rod fixation device and spine screw rod fixation system Download PDFInfo
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- CN103431903A CN103431903A CN2013103939939A CN201310393993A CN103431903A CN 103431903 A CN103431903 A CN 103431903A CN 2013103939939 A CN2013103939939 A CN 2013103939939A CN 201310393993 A CN201310393993 A CN 201310393993A CN 103431903 A CN103431903 A CN 103431903A
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Abstract
The invention discloses an anti-loose screw plug, which comprises a cylindrical screw plug main body, wherein an outer screw thread is arranged on the outer peripheral surface of the screw plug main body, and an annular elastic deformable force storage tank is arranged on the outer periphery of the screw plug main body and below the outer screw thread. The invention also discloses a spine screw rod fixation device and a spine screw rod fixation system with the anti-loose screw plug. The annular elastic deformable force storage tank is formed on the lower edge of the anti-loose screw plug, and during the locking process, enough stress and elastic deformation are generated by the screw plug main body to achieve the anti-loose effect.
Description
Technical field
The present invention relates to spinal implant field in medical skill, relate in particular to a kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system.
Background technology
The implant of spine nail rod utilization, as shown in Figure 1-2, comprise pedicle nail 1 ', Orthopedic rod 2 ' and plug screw 3 ', the U-shaped groove of pedicle nail 1 ' be provided with.During operation first by pedicle nail 1 ' implantation vertebral body, then by suitable Orthopedic rod 2 ' be placed in pedicle nail 1 ' U-shaped groove, with plug screw 3 ' screw in U-shaped groove, in order to Orthopedic rod 2 ' tentatively fix.After this by instruments such as curved rod device, dilators to Orthopedic rod 2 ' and pedicle nail 1 ' adjusted, spinal column is carried out to orthopedic resetting, finally with plug screw 3 ' by Orthopedic rod 2 ' be locked in U-shaped groove, make Orthopedic rod 2 ' with pedicle nail 1 with Orthopedic rod 2 ' be connected ' become one, to prevent Orthopedic rod 2 ' pedicle nail 1 ' motion relatively.
In the pedicle nail fixed system of said structure, plug screw 3 ' with pedicle nail 1 ' between the lead angle that is threaded must be less than the angle of friction of screw thread, by after plug screw 3 ' and pedicle nail 1 ' apply prefastening torque, maximum static friction force on the screw thread contact surface must be greater than the external force that makes thread looseness, just can make screw thread not loosening.But postoperative when the patient is moved, this follows closely the external force that excellent fixed system can be changed, be plug screw 3 ' and pedicle nail 1 ' screw thread can produce vibration and impact external force, now external force may the instantaneous frictional force be greater than between screw thread, screw thread will become flexible by trace like this, for the first time trace loosening after, pretightning force can significantly reduce, after this in less vibration with impact plug screw 3 under external force ' will become flexible, and then cause Orthopedic rod 2 ' and pedicle nail 1 ' loosening, implant was lost efficacy.
Summary of the invention
Goal of the invention of the present invention is to overcome defect of the prior art, and a kind of locking plug screw that can tightly lock and prevent from becoming flexible, spine nail bar fixing device and spine nail rod fixed system are provided.
Technical scheme of the present invention provides a kind of locking plug screw, comprises cylindrical plug screw main body, on the outer peripheral face of described plug screw main body, is provided with external screw thread, on the outer peripheral face of described plug screw main body, described, be provided with cyclic spring deformation below externally threaded and hold the power groove.
Further, this locking plug screw is formed by the titanium alloy material manufacture, and the tensile strength of described locking plug screw is greater than 900MPa, and the Proof strength of non-proportional of described locking plug screw is greater than 800MPa.
Further, the inside of described plug screw main body is provided with the hexagon cavity, and described hexagon cavity below is connected with circular cylindrical cavity, and described hexagon cavity and described circular cylindrical cavity connect the upper and lower surface of described plug screw main body.
Technical solution of the present invention also provides a kind of spine nail bar fixing device, comprise pedicle nail, Orthopedic rod and locking plug screw, described pedicle nail comprises pedicle nail top and the pedicle nail bottom be connected with described pedicle nail top, described pedicle nail top is provided with U-shaped groove, be provided with upper internal threaded in described U-shaped groove, described pedicle nail bottom is provided with lower external thread; Described Orthopedic rod is cylindrical, and the end of described Orthopedic rod is connected to the bottom of described U-shaped groove; Described locking plug screw comprises cylindrical plug screw main body, is provided with the external screw thread matched with described upper internal threaded on the outer peripheral face of described plug screw main body, and described locking plug screw is threaded in described U-shaped groove; Be provided with cyclic spring deformation below externally threaded and hold the power groove described on the outer peripheral face of described plug screw main body; There is described cyclic spring deformation on described locking plug screw and hold the end of power groove and match with described Orthopedic rod, and described Orthopedic rod is locked in described U-shaped groove.
Further, described cyclic spring deformation is held the power groove and is comprised and hold power groove lower wall, the described power of holding groove lower wall is engaged on the end of described Orthopedic rod, described locking plug screw rotation moves down and is arranged in described U-shaped groove, the described power of holding groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body and from described upper internal threaded the axially stress vertically downward along described plug screw main body, the described power of holding groove lower wall generation elastic deformation, and the end of described Orthopedic rod is locked in described U-shaped groove.
Further, described pedicle nail, Orthopedic rod and locking plug screw form by the titanium alloy material manufacture, the tensile strength of described pedicle nail, Orthopedic rod and locking plug screw all is greater than 900MPa, and the Proof strength of non-proportional of described pedicle nail, Orthopedic rod and locking plug screw all is greater than 800MPa.
Further, the inside of described plug screw main body is provided with the hexagon cavity, and described hexagon cavity below is connected with circular cylindrical cavity, and described hexagon cavity and described circular cylindrical cavity connect the upper and lower surface of described plug screw main body.
Technical solution of the present invention also provides a kind of spine nail rod fixed system, comprise two pedicle nails, an Orthopedic rod and two locking plug screws, every described pedicle nail includes pedicle nail top and the pedicle nail bottom be connected with described pedicle nail top, described pedicle nail top is provided with U-shaped groove, be provided with upper internal threaded in described U-shaped groove, described pedicle nail bottom is provided with lower external thread; Described Orthopedic rod is cylindrical, and an end of described Orthopedic rod is connected to the bottom of the described U-shaped groove of a described pedicle nail, and another end of described Orthopedic rod is connected to the bottom of the described U-shaped groove of the described pedicle nail of another root; Described locking plug screw comprises cylindrical plug screw main body, is provided with the external screw thread matched with described upper internal threaded on the outer peripheral face of described plug screw main body, and a described locking plug screw all has been threaded in the described U-shaped groove of every described pedicle nail; Be provided with cyclic spring deformation below externally threaded and hold the power groove described on the outer peripheral face of each described plug screw main body; There is described cyclic spring deformation on two described locking plug screws and hold the end of power groove and match with two ends of described Orthopedic rod respectively, and two ends of described Orthopedic rod are locked in respectively in two described U-shaped grooves.
Further, each described cyclic spring deformation is held the power groove and is comprised and hold power groove lower wall, two the described power of holding groove lower walls are engaged in respectively on two ends of described Orthopedic rod, two described locking plug screws rotate respectively and move down and be arranged in two described U-shaped grooves, each the described power of holding groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body and from described upper internal threaded the axially stress vertically downward along described plug screw main body, elastic deformation occurs respectively in two the described power of holding groove lower walls, and two ends of described Orthopedic rod are locked in respectively in two described U-shaped grooves.
Further, include many described pedicle nails and a plurality of described locking plug screw that coordinate corresponding to described many described pedicle nails in this spine nail rod fixed system, all be connected with a described locking plug screw in the described U-shaped groove of every described pedicle nail, described many pedicle nails are corresponding to be engaged on described Orthopedic rod.
Adopt technique scheme, there is following beneficial effect:
By on the outer peripheral face of locking plug screw, described, be provided with cyclic spring deformation below externally threaded and hold the power groove, cyclic spring deformation is held the power groove when being subject to external force, and elastic deformation can occur, thereby reaches locking purpose.In the time of in the U-lag on locking plug screw screw-in pedicle nail top, the pedicle nail upper internal threaded can produce downward stress, correction stick can produce stress upwards, increase along with turning moment in the locking process, the power of the holding groove lower wall place that the power groove is held in the cyclic spring deformation of locking plug screw bottom, due to the effect of internal stress, can make this hold power groove lower wall and produce strain.After removing moment of torsion, this elastically-deformable existence makes locking plug screw bear axial pressure, has increased the frictional force between the external screw thread of the upper internal threaded of pedicle nail and plug screw, has also increased the frictional force between locking plug screw and Orthopedic rod.The vibration continued when the top screw thread and while impacting external force, although frictional force, generation trace that external force may instantaneously be greater than between screw thread are loosening, but the existence due to the elastically-deformable power of holding groove lower wall, pretightning force can significantly not reduce, but it is loosening to make up the trace of locking plug screw by the trace loss of strain and internal stress, thereby kept the pretightning force between locking plug screw and pedicle nail, and then kept the frictional force between screw thread, effectively prevented the loosening of locking plug screw.
The accompanying drawing explanation
The cutaway view that Fig. 1 is nail bar fixing device of the prior art;
Fig. 2 is the cutaway view of the nail bar fixing device shown in Fig. 1 from another angle;
The structural representation that Fig. 3 is a kind of locking plug screw provided by the invention;
The phantom that Fig. 4 is the locking plug screw shown in Fig. 3;
The cyclic spring deformation that Fig. 5 is the locking plug screw shown in Fig. 3 is held the power groove elastically-deformable schematic diagram is occurred;
The cyclic spring deformation that Fig. 6 is the locking plug screw shown in Fig. 3 is held the power groove elastically-deformable another angle schematic diagram is occurred;
The generation deformation of power groove and stressed schematic diagram are held in the cyclic spring deformation that Fig. 7 is the locking plug screw shown in Fig. 3;
The structural representation that Fig. 8 is a kind of spine nail bar fixing device provided by the invention;
Fig. 9 is the schematic diagram that in the spine nail bar fixing device shown in Fig. 8, pedicle nail and locking plug screw, Orthopedic rod are combined together;
Figure 10 is the partial sectional view that in the spine nail bar fixing device shown in Fig. 8, pedicle nail and locking plug screw, Orthopedic rod are combined together;
Schematic diagram in the U-lag that Figure 11 is locking plug screw screw-in pedicle nail;
The schematic diagram of another angle in the U-lag that Figure 12 is the locking plug screw screw-in pedicle nail shown in Figure 11;
The structural representation that Figure 13 is a kind of spine nail rod fixed system provided by the invention.
The Reference numeral synopsis:
The specific embodiment
Further illustrate the specific embodiment of the present invention below in conjunction with accompanying drawing.
As shown in Fig. 3-7, a kind of locking plug screw 1 provided by the invention, comprise cylindrical plug screw main body 11, is provided with external screw thread 12 on the outer peripheral face of plug screw main body 11, is provided with cyclic spring deformation on the outer peripheral face of plug screw main body 12 and holds power groove 13 below external screw thread 12.
This locking plug screw 1 is mainly used in the implant of spine nail rod utilization, is about to built-in being fixed in spinal column of nail rod, with the treatment vertebrae disease.This locking plug screw 1 comprises plug screw main body 11, and this plug screw main body 11 is cylindrical, i.e. cylindrical.Be provided with external screw thread 12 on the outer peripheral face of plug screw main body 11, for pedicle nail, being fixed Orthopedic rod.In order to prevent when being subject to external force, produce and become flexible between this locking plug screw 1 and pedicle nail, be provided with cyclic spring deformation and hold power groove 13 on the outer peripheral face of plug screw main body 11, the below that power groove 13 is positioned at external screw thread 12 is held in this cyclic spring deformation.Having cyclic spring deformation on plug screw main body 11 holds the end of power groove 13 and supports on Orthopedic rod, as shown in Fig. 5-7, when cyclic spring deformation is held power groove 13 and is subject to the power F downward from pedicle nail and the power M that is subject to making progress from Orthopedic rod, the power of the holding groove lower wall 14 that power groove 13 is held in this cyclic spring deformation can produce elastic deformation, thereby Orthopedic rod is locked in the U-lag of pedicle nail, plays locking effect.
Above-mentioned locking plug screw 1 is formed by the titanium alloy material manufacture, and the tensile strength of this locking plug screw 1 is greater than 900MPa, and the Proof strength of non-proportional of locking plug screw 1 is greater than 800MPa.Tensile strength is the maximum nominal tensile stress that locking plug screw 1 can bear before breaking; Afore mentioned rules Non-proportional extension intensity refers generally to sample in drawing process, after the removal pulling force, the permanent elongation of sample marking distance part distortion (moulding distortion) amount reach former gauge length 0.2% the time corresponding stress.
As in Figure 3-5, the inside of above-mentioned plug screw main body 11 is provided with hexagon cavity 15, and hexagon cavity 15 belows are connected with circular cylindrical cavity 16, and hexagon cavity 15 and circular cylindrical cavity 16 connect the upper and lower surface of plug screw main body 11.Above-mentioned hexagon cavity 15 makes plug screw main body 11 have interior hexagonal structure, for coordinating with inner hexagon spanner, locking plug screw 1 is screwed in the U-lag of pedicle nail, and this hexagon cavity 15 and circular cylindrical cavity 16 are hollow structure, can further alleviate the weight of structure, reduce the weight of implant integral body.
As shown in Fig. 8-12, the present invention also provides a kind of spine nail bar fixing device, comprise pedicle nail 2, Orthopedic rod 3 and locking plug screw 1, this pedicle nail 2 comprises pedicle nail top 21 and the pedicle nail bottom 22 be connected with pedicle nail top 21, pedicle nail top 21 is provided with U-shaped groove 23, be provided with upper internal threaded 25 in this U-shaped groove 23, pedicle nail bottom 22 is provided with lower external thread 24; Orthopedic rod 3 is cylindrical, and the end of Orthopedic rod 2 is connected to the bottom of U-shaped groove 23; Shown in Fig. 3-7, this locking plug screw 1 comprises cylindrical plug screw main body 11, is provided with the external screw thread 12 matched with upper internal threaded 25 on the outer peripheral face of plug screw main body 11, and locking plug screw 1 is threaded in U-shaped groove 23; Be provided with cyclic spring deformation on the outer peripheral face of plug screw main body 11 and hold power groove 13 below external screw thread 12; There is cyclic spring deformation on locking plug screw 1 and hold the end of power groove 13 and match with Orthopedic rod 3, and Orthopedic rod 3 is locked in U-shaped groove 23.
This spine nail bar fixing device is mainly used in the implant of spine nail rod utilization, is about to built-in being fixed in spinal column of nail rod, with the treatment vertebrae disease.This spine nail bar fixing device comprises pedicle nail 2, Orthopedic rod 3 and locking plug screw 1.Pedicle nail 2, for being connected with vertebra, playing and fixedly closes supporting role, and Orthopedic rod 3 is corrected for treating therapentic part, and locking plug screw 1, for Orthopedic rod 3 is locked in the U-shaped groove 23 of pedicle nail 2, plays locking action.
Above-mentioned this pedicle nail 2 comprises pedicle nail top 21 and pedicle nail bottom 22, and pedicle nail top 21 is provided with U-shaped groove 23, in this U-shaped groove 23, is provided with upper internal threaded 25, and pedicle nail bottom 22 is provided with lower external thread 24.Pedicle nail top 21 coordinates with the external screw thread 12 of locking plug screw 1 by the upper internal threaded 25 in U-shaped groove 23, and locking plug screw 1 is threaded in the U-shaped groove 23 on this pedicle nail top 21.Pedicle nail bottom 22, by lower external thread 24 access vertebras, is played and is fixedly closed supporting role.
Above-mentioned Orthopedic rod 3 is cylindrical, and the end of Orthopedic rod 2 is connected to the bottom of U-shaped groove 23, for treating therapentic part, carries out corrective therapy.
As mentioned above, this locking plug screw 1 comprises plug screw main body 11, and this plug screw main body 11 is cylindrical.Be provided with external screw thread 12 on the outer peripheral face of plug screw main body 11, coordinate for the upper internal threaded 25 in the U-shaped groove 23 with pedicle nail 2, with fixing Orthopedic rod 3.In order to prevent when being subject to external force, produce and become flexible between this locking plug screw 1 and pedicle nail, be provided with cyclic spring deformation and hold power groove 13 on the outer peripheral face of plug screw main body 11, the below that power groove 13 is positioned at external screw thread 12 is held in this cyclic spring deformation.Having cyclic spring deformation on plug screw main body 11 holds the end of power groove 13 and supports on Orthopedic rod 3, as shown in Fig. 5-7, when cyclic spring deformation is held power groove 13 and is subject to power M that the power F downward along plug screw main body 11 axis from pedicle nail 2 and being subject to make progress along plug screw main body 11 axis from Orthopedic rod 3, power groove 13 is held in this cyclic spring deformation can produce elastic deformation, thereby Orthopedic rod 3 is locked in the U-lag 23 of pedicle nail 2, plays locking effect.
As shown in Fig. 3-7 and Fig. 9-12, above-mentioned cyclic spring deformation is held power groove 13 and is comprised and hold power groove lower wall 14, this holds power groove lower wall 14 and is engaged on the end of Orthopedic rod 3, locking plug screw 1 rotation moves down and is arranged in U-shaped groove 23, this hold power groove lower wall 14 be subject to from Orthopedic rod 3 along the axially stress M vertically upward of plug screw main body 11 and from upper internal threaded 25 the axially stress F vertically downward along plug screw main body 11, hold power groove lower wall 14 elastic deformation occurs, and the end of Orthopedic rod 3 is locked in U-shaped groove 23.
Be specially, when the U-lag 23 on locking plug screw 1 screw-in pedicle nail top 21 is interior, the female thread 25 on pedicle nail top 23 can produce downward stress F, correction stick 3 can produce stress M upwards, along with turning moment T(in the locking process is about 10Nm) increase, the power of holding groove lower wall 14 places of power groove 13 are held in the cyclic spring deformation of locking plug screw 1 bottom, due to the effect of internal stress, can make this hold power groove lower wall 14 and produce strain.After removing torque T, this elastically-deformable existence makes locking plug screw 1 bear axial pressure, increase the frictional force between the external screw thread 12 of the upper internal threaded 23 of pedicle nail 2 and locking plug screw 1, also increased the frictional force between locking plug screw 1 and Orthopedic rod 3.The vibration continued when the top screw thread and while impacting external force, although frictional force, generation trace that external force may instantaneously be greater than between screw thread are loosening, but the existence due to the elastically-deformable power of holding groove lower wall 14, pretightning force can significantly not reduce, but it is loosening to make up the trace of locking plug screw 1 by the trace loss of strain and internal stress, thereby kept the pretightning force between locking plug screw 1 and pedicle nail 2, and then kept the frictional force between screw thread, effectively prevented the loosening of locking plug screw 1.
Above-mentioned pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 form by the titanium alloy material manufacture, the tensile strength of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 all is greater than 900MPa, and the Proof strength of non-proportional of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 all is greater than 800MPa.
As in Figure 3-5, the inside of above-mentioned plug screw main body 11 is provided with hexagon cavity 15, and hexagon cavity 15 belows are connected with circular cylindrical cavity 16, and hexagon cavity 15 and circular cylindrical cavity 16 connect the upper and lower surface of plug screw main body 11.Above-mentioned hexagon cavity 15 makes plug screw main body 11 have interior hexagonal structure, for coordinating with inner hexagon spanner, locking plug screw 1 is screwed in the U-lag 23 of pedicle nail 2, and this hexagon cavity 15 and circular cylindrical cavity 16 are hollow structure, can further alleviate the weight of structure, reduce the weight of implant integral body.
As shown in figure 13, a kind of spine nail rod fixed system provided by the invention, comprise two pedicle nails 2, Orthopedic rod 3 and two locking plug screws 1, shown in Fig. 8-12, every pedicle nail 2 includes pedicle nail top 21 and the pedicle nail bottom 22 be connected with pedicle nail top 21, pedicle nail top 21 is provided with U-shaped groove 23, in U-shaped groove 23, is provided with upper internal threaded 25, and pedicle nail bottom 22 is provided with lower external thread 24; Orthopedic rod 3 is cylindrical, and an end of Orthopedic rod 3 is connected to the bottom of the U-shaped groove 23 of a pedicle nail 2, and another end of this Orthopedic rod 3 is connected to the bottom of the U-shaped groove 23 of another root pedicle nail 2; Shown in Fig. 3-7, above-mentioned locking plug screw 1 comprises cylindrical plug screw main body 11, is provided with the external screw thread 12 matched with upper internal threaded 25 on the outer peripheral face of plug screw main body 11, the 23 locking plug screws 1 that all have been threaded in the U-shaped groove of every pedicle nail 2; Be provided with cyclic spring deformation on the outer peripheral face of each plug screw main body 11 and hold power groove 13 below external screw thread 12; There is cyclic spring deformation on two locking plug screws 1 and hold the end of power groove 13 and match with two ends of Orthopedic rod 3 respectively, and two ends of Orthopedic rod 3 are locked in respectively in two U-shaped grooves 23.
That is, this follows closely excellent fixed system, comprises two pedicle nails 2, Orthopedic rod 3 and two locking plug screws 1.The interior locking plug screw 1 that all has been threaded of the U-lag 23 of every pedicle nail 2, two ends of Orthopedic rod 3 are connected in two U-lags 23, and by two locking plug screws 1, two ends of Orthopedic rod 3 are locked in two U-lags 23 respectively.
As shown in Fig. 3-7 and Fig. 9-12, each cyclic spring deformation is held power groove 13 and is comprised and hold power groove lower wall 14, two are held power groove lower wall 14 and are engaged in respectively on two ends of Orthopedic rod 3, two locking plug screws 1 rotate respectively and move down and be arranged in two U-shaped grooves 23, each hold power groove lower wall 14 be subject to from Orthopedic rod 3 along the axially stress M vertically upward of plug screw main body 11 and from upper internal threaded 25 the axially stress F vertically downward along plug screw main body 11, two are held power groove lower wall 14 elastic deformation occur respectively, and two ends of Orthopedic rod 3 are locked in respectively in two U-shaped grooves 23.
As mentioned above, when the U-lag 23 on locking plug screw 1 screw-in pedicle nail top 21 is interior, the female thread 25 on pedicle nail top 23 can produce downward stress F, correction stick 3 can produce stress M upwards, along with turning moment T(in the locking process is about 10Nm) increase, the power of holding groove lower wall 14 places of power groove 13 are held in the cyclic spring deformation of locking plug screw 1 bottom, due to the effect of internal stress, can make this hold power groove lower wall 14 and produce strain.After removing torque T, this elastically-deformable existence makes locking plug screw 1 bear axial pressure, increase the frictional force between the external screw thread 12 of the upper internal threaded 23 of pedicle nail 2 and locking plug screw 1, also increased the frictional force between locking plug screw 1 and Orthopedic rod 3.The vibration continued when the top screw thread and while impacting external force, although frictional force, generation trace that external force may instantaneously be greater than between screw thread are loosening, but the existence due to the elastically-deformable power of holding groove lower wall 14, pretightning force can significantly not reduce, but it is loosening to make up the trace of locking plug screw 1 by the trace loss of strain and internal stress, thereby kept the pretightning force between locking plug screw 1 and pedicle nail 2, and then kept the frictional force between screw thread, effectively prevented the loosening of locking plug screw 1.
As in Figure 3-5, the inside of above-mentioned plug screw main body 11 is provided with hexagon cavity 15, and hexagon cavity 15 belows are connected with circular cylindrical cavity 16, and hexagon cavity 15 and circular cylindrical cavity 16 connect the upper and lower surface of plug screw main body 11.Above-mentioned pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 form by the titanium alloy material manufacture, the tensile strength of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 all is greater than 900MPa, and the Proof strength of non-proportional of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 all is greater than 800MPa.Above-mentioned hexagon cavity 15 makes plug screw main body 11 have interior hexagonal structure, for coordinating with inner hexagon spanner, locking plug screw 1 is screwed in the U-lag 23 of pedicle nail 2, and this hexagon cavity 15 and circular cylindrical cavity 16 are hollow structure, can further alleviate the weight of structure, reduce the weight of implant integral body.
Preferably, include many pedicle nails 2 and a plurality of locking plug screw 1 that coordinate corresponding to many pedicle nails 2 in this spine nail rod fixed system, the described U-shaped groove 23 of every pedicle nail 2 is interior all is connected with a locking plug screw 1, and above-mentioned many pedicle nails 2 are corresponding to be engaged on Orthopedic rod 3.It is the number of locking plug screw 1 and corresponding the equating of number of pedicle nail 2, at the interior locking plug screw 1 that all has been threaded of the U-shaped groove 23 of every pedicle nail 2, many pedicle nails 2 are engaged on Orthopedic rod 3 side by side, can with vertebra, be connected by multiple spot in use, play and fixedly close supporting role, improved the stability that system connects.
This spine nail rod fixed system can two be used side by side, makes two Orthopedic rods 3 arrange side by side, to have improved overall construction intensity.
A kind of locking plug screw provided by the invention, spine nail bar fixing device and spine nail rod fixed system, its locking principle is to process a cyclic spring deformation in locking plug screw lower edge to hold the power groove, in when locking, by the plug screw main body, produces enough large stress and strain to reach locking purpose.In the present invention, cyclic spring deformation is held the size shape of power groove and is designed according to size, shape and the material of locking plug screw; The screw thread of locking plug screw and pedicle nail can be designed to rectangle, triangle, rectangle, zigzag etc. as required.
Above-described is only principle of the present invention and preferred embodiment.It should be pointed out that for the person of ordinary skill of the art, on the basis of the principle of the invention, can also make some other modification, also should be considered as protection scope of the present invention.
Claims (10)
1. a locking plug screw, comprise cylindrical plug screw main body, on the outer peripheral face of described plug screw main body, is provided with external screw thread,
It is characterized in that, on the outer peripheral face of described plug screw main body, described, be provided with cyclic spring deformation below externally threaded and hold the power groove.
2. a kind of locking plug screw according to claim 1, is characterized in that, this locking plug screw is formed by the titanium alloy material manufacture, and the tensile strength of described locking plug screw is greater than 900MPa, and the Proof strength of non-proportional of described locking plug screw is greater than 800MPa.
3. a kind of locking plug screw according to claim 1, it is characterized in that, the inside of described plug screw main body is provided with the hexagon cavity, and described hexagon cavity below is connected with circular cylindrical cavity, and described hexagon cavity and described circular cylindrical cavity connect the upper and lower surface of described plug screw main body.
4. a spine nail bar fixing device, comprise pedicle nail, Orthopedic rod and locking plug screw,
Described pedicle nail comprises pedicle nail top and the pedicle nail bottom be connected with described pedicle nail top, and described pedicle nail top is provided with U-shaped groove, in described U-shaped groove, is provided with upper internal threaded, and described pedicle nail bottom is provided with lower external thread;
Described Orthopedic rod is cylindrical, and the end of described Orthopedic rod is connected to the bottom of described U-shaped groove;
Described locking plug screw comprises cylindrical plug screw main body, is provided with the external screw thread matched with described upper internal threaded on the outer peripheral face of described plug screw main body, and described locking plug screw is threaded in described U-shaped groove;
It is characterized in that, on the outer peripheral face of described plug screw main body, described, be provided with cyclic spring deformation below externally threaded and hold the power groove;
There is described cyclic spring deformation on described locking plug screw and hold the end of power groove and match with described Orthopedic rod, and described Orthopedic rod is locked in described U-shaped groove.
5. a kind of spine nail bar fixing device according to claim 4, is characterized in that, described cyclic spring deformation is held the power groove and comprised and hold power groove lower wall, and the described power of holding groove lower wall is engaged on the end of described Orthopedic rod,
Described locking plug screw rotation moves down and is arranged in described U-shaped groove, the described power of holding groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body and from described upper internal threaded the axially stress vertically downward along described plug screw main body, the described power of holding groove lower wall generation elastic deformation, and the end of described Orthopedic rod is locked in described U-shaped groove.
6. a kind of spine nail bar fixing device according to claim 5, it is characterized in that, described pedicle nail, Orthopedic rod and locking plug screw form by the titanium alloy material manufacture, the tensile strength of described pedicle nail, Orthopedic rod and locking plug screw all is greater than 900MPa, and the Proof strength of non-proportional of described pedicle nail, Orthopedic rod and locking plug screw all is greater than 800MPa.
7. a kind of spine nail bar fixing device according to claim 5, it is characterized in that, the inside of described plug screw main body is provided with the hexagon cavity, described hexagon cavity below is connected with circular cylindrical cavity, and described hexagon cavity and described circular cylindrical cavity connect the upper and lower surface of described plug screw main body.
8. a spine nail rod fixed system, comprise two pedicle nails, an Orthopedic rod and two locking plug screws,
Every described pedicle nail includes pedicle nail top and the pedicle nail bottom be connected with described pedicle nail top, described pedicle nail top is provided with U-shaped groove, be provided with upper internal threaded in described U-shaped groove, described pedicle nail bottom is provided with lower external thread;
Described Orthopedic rod is cylindrical, and an end of described Orthopedic rod is connected to the bottom of the described U-shaped groove of a described pedicle nail, and another end of described Orthopedic rod is connected to the bottom of the described U-shaped groove of the described pedicle nail of another root;
Described locking plug screw comprises cylindrical plug screw main body, is provided with the external screw thread matched with described upper internal threaded on the outer peripheral face of described plug screw main body, and a described locking plug screw all has been threaded in the described U-shaped groove of every described pedicle nail;
It is characterized in that, on the outer peripheral face of each described plug screw main body, described, be provided with cyclic spring deformation below externally threaded and hold the power groove;
There is described cyclic spring deformation on two described locking plug screws and hold the end of power groove and match with two ends of described Orthopedic rod respectively, and two ends of described Orthopedic rod are locked in respectively in two described U-shaped grooves.
9. a kind of spine nail rod fixed system according to claim 8, is characterized in that, each described cyclic spring deformation is held the power groove and comprised and hold power groove lower wall, and two the described power of holding groove lower walls are engaged in respectively on two ends of described Orthopedic rod,
Two described locking plug screws rotate respectively and move down and be arranged in two described U-shaped grooves, each the described power of holding groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body and from described upper internal threaded the axially stress vertically downward along described plug screw main body, elastic deformation occurs respectively in two the described power of holding groove lower walls, and two ends of described Orthopedic rod are locked in respectively in two described U-shaped grooves.
10. a kind of spine nail rod fixed system according to claim 9, it is characterized in that, include many described pedicle nails and a plurality of described locking plug screw that coordinate corresponding to described many described pedicle nails in this spine nail rod fixed system, all be connected with a described locking plug screw in the described U-shaped groove of every described pedicle nail, described many pedicle nails are corresponding to be engaged on described Orthopedic rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393993.9A CN103431903B (en) | 2013-09-03 | 2013-09-03 | A kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310393993.9A CN103431903B (en) | 2013-09-03 | 2013-09-03 | A kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system |
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| CN103431903A true CN103431903A (en) | 2013-12-11 |
| CN103431903B CN103431903B (en) | 2016-01-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109381251A (en) * | 2017-08-08 | 2019-02-26 | 比德尔曼技术有限责任两合公司 | Receiving part and instrument for keeping the receiving part |
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| CN201223436Y (en) * | 2008-05-22 | 2009-04-22 | 冠亚生技股份有限公司 | Nail and pole device for dynamically fixing vertebra |
| CN101677830A (en) * | 2008-02-27 | 2010-03-24 | 崔吉运 | Buffer type vertebral pedicle screw |
| CN102287439A (en) * | 2010-06-17 | 2011-12-21 | 北汽福田汽车股份有限公司 | lock nut |
| EP2468200A1 (en) * | 2010-12-21 | 2012-06-27 | Zimmer Spine | Orthopaedic device and methods for its pre-assembly and assembly |
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| EP0870474A1 (en) * | 1996-08-07 | 1998-10-14 | Bioprot, S.A. | Improvements to devices for fixing and correcting dorsal vertebrae |
| CN101677830A (en) * | 2008-02-27 | 2010-03-24 | 崔吉运 | Buffer type vertebral pedicle screw |
| CN201223436Y (en) * | 2008-05-22 | 2009-04-22 | 冠亚生技股份有限公司 | Nail and pole device for dynamically fixing vertebra |
| CN102287439A (en) * | 2010-06-17 | 2011-12-21 | 北汽福田汽车股份有限公司 | lock nut |
| EP2468200A1 (en) * | 2010-12-21 | 2012-06-27 | Zimmer Spine | Orthopaedic device and methods for its pre-assembly and assembly |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109381251A (en) * | 2017-08-08 | 2019-02-26 | 比德尔曼技术有限责任两合公司 | Receiving part and instrument for keeping the receiving part |
| CN109381251B (en) * | 2017-08-08 | 2021-08-24 | 比德尔曼技术有限责任两合公司 | Receiving part and instrument for holding the receiving part |
| US11197695B2 (en) | 2017-08-08 | 2021-12-14 | Biedermann Technologies Gmbh & Co. Kg | Receiving part and instrument for holding the receiving part |
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| Publication number | Publication date |
|---|---|
| CN103431903B (en) | 2016-01-20 |
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