CN103431903B - A kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system - Google Patents
A kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system Download PDFInfo
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- CN103431903B CN103431903B CN201310393993.9A CN201310393993A CN103431903B CN 103431903 B CN103431903 B CN 103431903B CN 201310393993 A CN201310393993 A CN 201310393993A CN 103431903 B CN103431903 B CN 103431903B
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Abstract
The invention discloses a kind of locking plug screw, comprise cylindrical plug screw main body, the outer peripheral face of described plug screw main body is provided with external screw thread, the outer peripheral face of described plug screw main body is provided with cyclic spring deformation in described externally threaded below and stores power groove.The invention also discloses the spine nail bar fixing device and spine nail rod fixed system with above-mentioned locking plug screw.Storing power groove by processing a cyclic spring deformation in locking plug screw lower edge, producing enough large stress and elastic deformation to reach locking object when locking by plug screw main body.
Description
Technical field
The present invention relates to spinal implant field in medical skill, particularly relate to a kind of locking plug screw, spine nail bar fixing device and spine nail rod fixed system.
Background technology
The implant that spine nail rod technology uses, as shown in Figure 1-2, comprise pedicle nail 1 ', Orthopedic rod 2 ' and plug screw 3 ', pedicle nail 1 ' is provided with U-type groove.First pedicle nail 1 ' is implanted in vertebral body during operation, more suitable Orthopedic rod 2 ' is placed in the U-type groove of pedicle nail 1 ', screw in U-type groove, in order to tentatively to fix Orthopedic rod 2 ' with plug screw 3 '.After this by instruments such as curved rod device, dilators, Orthopedic rod 2 ' and pedicle nail 1 ' are adjusted, orthopedic reset is carried out to spinal column, finally with plug screw 3 ', Orthopedic rod 2 ' is locked in U-type groove, the pedicle nail 1 ' making Orthopedic rod 2 ' and be connected with Orthopedic rod 2 ' becomes one, to prevent Orthopedic rod 2 ' pedicle nail 1 ' motion relatively.
In the nail pedicle fix system of said structure, the lead angle be threaded between plug screw 3 ' with pedicle nail 1 ' must be less than the angle of friction of screw thread, namely by after plug screw 3 ' and pedicle nail 1 ' applying prefastening torque, maximum static friction force on thread contact face must be greater than the external force making thread looseness, and screw thread just can be made not loosen.But postoperative when patient moves, this follows closely the external force that excellent fixed system can be changed, namely the screw thread of plug screw 3 ' and pedicle nail 1 ' can produce vibration and impact external force, the now instantaneous frictional force be greater than between screw thread of external force possibility, such screw thread will loosen by trace, after trace loosens for the first time, pretightning force can significantly reduce, and after this under less vibration and impact external force, plug screw 3 ' will loosen, and then cause loosening of Orthopedic rod 2 ' and pedicle nail 1 ', implant was lost efficacy.
Summary of the invention
Goal of the invention of the present invention is to overcome defect of the prior art, provides a kind of and can tightly lock and the locking plug screw, spine nail bar fixing device and the spine nail that prevent from loosening rod fixed system.
Technical scheme of the present invention provides a kind of locking plug screw, comprises cylindrical plug screw main body, and the outer peripheral face of described plug screw main body is provided with external screw thread, the outer peripheral face of described plug screw main body is provided with cyclic spring deformation in described externally threaded below and stores power groove.
Further, this locking plug screw is formed by 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 hexagon cavity, is connected with circular cylindrical cavity below described hexagon cavity, the upper and lower surface of described hexagon cavity and the through described plug screw main body of described circular cylindrical cavity.
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, the pedicle nail bottom that described pedicle nail comprises pedicle nail top and is connected with described pedicle nail top, described pedicle nail top is provided with U-type groove, be provided with upper internal threaded in described U-type 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-type groove; Described locking plug screw comprises cylindrical plug screw main body, the outer peripheral face of described plug screw main body is provided with the external screw thread matched with described upper internal threaded, and described locking plug screw is threaded in described U-type groove; The outer peripheral face of described plug screw main body is provided with cyclic spring deformation in described externally threaded below and stores power groove; Described locking plug screw has the end that described cyclic spring deformation stores power groove to match with described Orthopedic rod, and described Orthopedic rod is locked in described U-type groove.
Further, described cyclic spring deformation stores power groove and comprises and store power groove lower wall, the described power of storing groove lower wall is engaged on the end of described Orthopedic rod, described locking plug screw rotates and moves down and be arranged in described U-type groove, the described power of storing groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body with from the axially stress vertically downward of described upper internal threaded along described plug screw main body, the described power of storing groove lower wall generation elastic deformation, and the end of described Orthopedic rod is locked in described U-type groove.
Further, described pedicle nail, Orthopedic rod and locking plug screw form by titanium alloy material manufacture, the tensile strength of described pedicle nail, Orthopedic rod and locking plug screw is all greater than 900MPa, and the Proof strength of non-proportional of described pedicle nail, Orthopedic rod and locking plug screw is all greater than 800MPa.
Further, the inside of described plug screw main body is provided with hexagon cavity, is connected with circular cylindrical cavity below described hexagon cavity, the upper and lower surface of described hexagon cavity and the through described plug screw main body of described circular cylindrical cavity.
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, the pedicle nail bottom that pedicle nail described in every root includes pedicle nail top and is connected with described pedicle nail top, described pedicle nail top is provided with U-type groove, be provided with upper internal threaded in described U-type 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-type groove of a described pedicle nail, and another end of described Orthopedic rod is connected to the bottom of the described U-type groove of pedicle nail described in another root; Described locking plug screw comprises cylindrical plug screw main body, the outer peripheral face of described plug screw main body is provided with the external screw thread matched with described upper internal threaded, and be all threaded in the described U-type groove of pedicle nail described in every root a described locking plug screw; The outer peripheral face of each described plug screw main body is provided with cyclic spring deformation in described externally threaded below and stores power groove; Two described locking plug screws have end that described cyclic spring deformation stores power groove respectively with two matching ends of described Orthopedic rod, and two of described Orthopedic rod ends to be locked in two described U-type groove respectively.
Further, each described cyclic spring deformation stores power groove and comprises and store power groove lower wall, storing power groove lower wall described in two is engaged on two ends of described Orthopedic rod respectively, two described locking plug screws rotate respectively and move down and be arranged in two described U-type groove, store described in each power groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body with from the axially stress vertically downward of described upper internal threaded along described plug screw main body, store power groove lower wall described in two and respectively elastic deformation occurs, and two of described Orthopedic rod ends are locked in two described U-type groove respectively.
Further, many described pedicle nails and the multiple described locking plug screw to the described many corresponding cooperations of described pedicle nail is included in this spine nail rod fixed system, all be connected with a described locking plug screw in the described U-type groove of pedicle nail described in every root, described many pedicle nails are corresponding to be engaged on described Orthopedic rod.
Adopt technique scheme, there is following beneficial effect:
Store power groove by being provided with cyclic spring deformation in described externally threaded below on the outer peripheral face of locking plug screw, cyclic spring deformation stores power groove when being subject to external force, elastic deformation can occur, thus reaches locking object.Time in the U-lag on locking plug screw screw-in pedicle nail top, pedicle nail upper internal threaded can produce downward stress, correction stick can produce stress upwards, along with the increase of turning moment in locking process, cyclic spring deformation bottom locking plug screw stores the power that the stores groove lower wall place of power groove, due to the effect of internal stress, this can be made to store power groove lower wall and to produce elastic deformation.After removing moment of torsion, this elastically-deformable existence makes locking plug screw bear axial pressure, namely adds the frictional force between the upper internal threaded of pedicle nail and the external screw thread of plug screw, too increases the frictional force between locking plug screw and Orthopedic rod.When the vibration that top screw thread is continued with when impacting external force, external force loosens although instantaneously may be greater than frictional force between screw thread, produce trace, but due to the existence of the elastically-deformable power of storing groove lower wall, pretightning force can not significantly reduce, but the trace making up locking plug screw by the insubstantial loss of elastic deformation and internal stress loosens, thus the pretightning force maintained between locking plug screw and pedicle nail, and then maintain the frictional force between screw thread, effectively prevent loosening of locking plug screw.
Accompanying drawing explanation
Fig. 1 is the sectional view of nail bar fixing device of the prior art;
Fig. 2 is for the nail bar fixing device shown in Fig. 1 is from the sectional view of another angle;
Fig. 3 is the structural representation of a kind of locking plug screw provided by the invention;
Fig. 4 is the phantom of the locking plug screw shown in Fig. 3;
The cyclic spring deformation that Fig. 5 is the locking plug screw shown in Fig. 3 stores power groove and elastically-deformable schematic diagram occurs;
The cyclic spring deformation that Fig. 6 is the locking plug screw shown in Fig. 3 stores power groove and another angle schematic diagram elastically-deformable occurs;
The cyclic spring deformation that Fig. 7 is the locking plug screw shown in Fig. 3 stores the generation deformation of power groove and stressed schematic diagram;
Fig. 8 is the structural representation of a kind of spine nail bar fixing device provided by the invention;
The schematic diagram that Fig. 9 is combined together for pedicle nail and locking plug screw, Orthopedic rod in the spine nail bar fixing device shown in Fig. 8;
The partial sectional view that Figure 10 is combined together for pedicle nail and locking plug screw, Orthopedic rod in the spine nail bar fixing device shown in Fig. 8;
Figure 11 is the schematic diagram that locking plug screw screws in the U-lag of 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;
Figure 13 is the structural representation of a kind of spine nail rod fixed system provided by the invention.
Reference numeral synopsis:
Detailed description of the invention
The specific embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
As shown in fig. 3 to 7, the locking plug screw 1 of one provided by the invention, comprises cylindrical plug screw main body 11, the outer peripheral face of plug screw main body 11 is provided with external screw thread 12, the outer peripheral face of plug screw main body 12 is provided with cyclic spring deformation in the below of external screw thread 12 and stores power groove 13.
This locking plug screw 1 is mainly used in the implant of spine nail rod technology use, and by following closely, rod is built-in to be fixed in spinal column, to treat 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.The outer peripheral face of plug screw main body 11 is provided with external screw thread 12, for coordinating fixing Orthopedic rod with pedicle nail.In order to prevent when being subject to external force, produce between this locking plug screw 1 and pedicle nail and loosen, the outer peripheral face of plug screw main body 11 is provided with cyclic spring deformation and stores power groove 13, this cyclic spring deformation stores the below that power groove 13 is positioned at external screw thread 12.Plug screw main body 11 having the end that cyclic spring deformation stores power groove 13 supports on Orthopedic rod, as illustrated in figs. 5-7, when cyclic spring deformation store power groove 13 be subject to from the downward power F of pedicle nail and be subject to from Orthopedic rod power M upwards time, the power that the stores groove lower wall 14 that this cyclic spring deformation stores power groove 13 can produce elastic deformation, thus Orthopedic rod is locked in the U-lag of pedicle nail, play locking effect.
Above-mentioned locking plug screw 1 is formed by 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 nonproportional cyclic straining refers generally to sample in drawing process, and after removal pulling force, stress corresponding when reaching 0.2% of former gauge length is measured in permanent elongation distortion (plastic deformation) of sample marking distance part.
As in Figure 3-5, the inside of above-mentioned plug screw main body 11 is provided with hexagon cavity 15, is connected with circular cylindrical cavity 16 below hexagon cavity 15, the upper and lower surface of hexagon cavity 15 and the through plug screw main body 11 of circular cylindrical cavity 16.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, the weight of structure can be alleviated further, reduce the weight of implant entirety.
As illustrated in figs. 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, the pedicle nail bottom 22 that this pedicle nail 2 comprises pedicle nail top 21 and is connected with pedicle nail top 21, pedicle nail top 21 is provided with U-type groove 23, be provided with upper internal threaded 25 in this U-type groove 23, pedicle nail bottom 22 is provided with lower external thread 24; Orthopedic rod 3 is in cylindrical, and the end of Orthopedic rod 2 is connected to the bottom of U-type groove 23; Shown in composition graphs 3-7, this locking plug screw 1 comprises cylindrical plug screw main body 11, the outer peripheral face of plug screw main body 11 is provided with the external screw thread 12 matched with upper internal threaded 25, and locking plug screw 1 is threaded in U-type groove 23; The outer peripheral face of plug screw main body 11 is provided with cyclic spring deformation in the below of external screw thread 12 and stores power groove 13; Locking plug screw 1 has the end that cyclic spring deformation stores power groove 13 to match with Orthopedic rod 3, and Orthopedic rod 3 is locked in U-type groove 23.
This spine nail bar fixing device is mainly used in the implant of spine nail rod technology use, and by following closely, rod is built-in to be fixed in spinal column, to treat vertebrae disease.This spine nail bar fixing device comprises pedicle nail 2, Orthopedic rod 3 and locking plug screw 1.Pedicle nail 2 is for being connected with vertebra, and play fixing conjunction supporting role, Orthopedic rod 3 is corrected for treating therapentic part, and locking plug screw 1, for being locked in the U-type groove 23 of pedicle nail 2 by Orthopedic rod 3, plays locking action.
This pedicle nail 2 above-mentioned comprises pedicle nail top 21 and pedicle nail bottom 22, and pedicle nail top 21 is provided with U-type groove 23, and be provided with upper internal threaded 25 in this U-type groove 23, pedicle nail bottom 22 is provided with lower external thread 24.Pedicle nail top 21 is coordinated by the external screw thread 12 of the upper internal threaded 25 in U-type groove 23 with locking plug screw 1, and locking plug screw 1 is threaded in the U-type groove 23 on this pedicle nail top 21.Pedicle nail bottom 22 is accessed in vertebra by lower external thread 24, plays fixing conjunction supporting role.
Above-mentioned Orthopedic rod 3 is in cylindrical, and the end of Orthopedic rod 2 is connected to the bottom of U-type groove 23, carries out corrective therapy for treating therapentic part.
As mentioned above, this locking plug screw 1 comprises plug screw main body 11, and this plug screw main body 11 is cylindrical.The outer peripheral face of plug screw main body 11 is provided with external screw thread 12, for coordinating with the upper internal threaded 25 in the U-type groove 23 of pedicle nail 2, with fixing Orthopedic rod 3.In order to prevent when being subject to external force, produce between this locking plug screw 1 and pedicle nail and loosen, the outer peripheral face of plug screw main body 11 is provided with cyclic spring deformation and stores power groove 13, this cyclic spring deformation stores the below that power groove 13 is positioned at external screw thread 12.Plug screw main body 11 has end that cyclic spring deformation stores power groove 13 and to support on Orthopedic rod 3, as illustrated in figs. 5-7, when cyclic spring deformation store power groove 13 be subject to from pedicle nail 2 along the downward power F of plug screw main body 11 axis and to be subject to from Orthopedic rod 3 along plug screw main body 11 axis power M upwards time, this cyclic spring deformation stores power groove 13 can produce elastic deformation, thus Orthopedic rod 3 is locked in the U-lag 23 of pedicle nail 2, play locking effect.
As shown in Fig. 3-7 and Fig. 9-12, above-mentioned cyclic spring deformation stores power groove 13 and comprises and store power groove lower wall 14, this stores power groove lower wall 14 and is engaged on the end of Orthopedic rod 3, locking plug screw 1 rotates and moves down and be arranged in U-type groove 23, this store 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 with from the axially stress F vertically downward of upper internal threaded 25 along plug screw main body 11, store power groove lower wall 14 and elastic deformation occurs, and the end of Orthopedic rod 3 is locked in U-type groove 23.
Be specially, when in the U-lag 23 that locking plug screw 1 screws in pedicle nail top 21, the female thread 25 on pedicle nail top 23 can produce downward stress F, correction stick 3 can produce stress M upwards, along with in locking process, turning moment T(is about 10Nm) increase, cyclic spring deformation bottom locking plug screw 1 stores the power that stores groove lower wall 14 place of power groove 13, due to the effect of internal stress, this can be made to store power groove lower wall 14 and produce elastic deformation.After removing torque T, this elastically-deformable existence makes locking plug screw 1 bear axial pressure, namely add the frictional force between the upper internal threaded 23 of pedicle nail 2 and the external screw thread 12 of locking plug screw 1, too increase the frictional force between locking plug screw 1 and Orthopedic rod 3.When the vibration that top screw thread is continued with when impacting external force, external force loosens although instantaneously may be greater than frictional force between screw thread, produce trace, but due to the existence of the elastically-deformable power of storing groove lower wall 14, pretightning force can not significantly reduce, but the trace making up locking plug screw 1 by the insubstantial loss of elastic deformation and internal stress loosens, thus the pretightning force maintained between locking plug screw 1 and pedicle nail 2, and then maintain the frictional force between screw thread, effectively prevent loosening of locking plug screw 1.
Above-mentioned pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 form by titanium alloy material manufacture, the tensile strength of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 is all greater than 900MPa, and the Proof strength of non-proportional of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 is all greater than 800MPa.
As in Figure 3-5, the inside of above-mentioned plug screw main body 11 is provided with hexagon cavity 15, is connected with circular cylindrical cavity 16 below hexagon cavity 15, the upper and lower surface of hexagon cavity 15 and the through plug screw main body 11 of circular cylindrical cavity 16.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, the weight of structure can be alleviated further, reduce the weight of implant entirety.
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 composition graphs 8-12, the pedicle nail bottom 22 that every root pedicle nail 2 includes pedicle nail top 21 and is connected with pedicle nail top 21, pedicle nail top 21 is provided with U-type groove 23, is provided with upper internal threaded 25 in U-type groove 23, and pedicle nail bottom 22 is provided with lower external thread 24; Orthopedic rod 3 is in cylindrical, and an end of Orthopedic rod 3 is connected to the bottom of the U-type groove 23 of a pedicle nail 2, and another end of this Orthopedic rod 3 is connected to the bottom of the U-type groove 23 of another root pedicle nail 2; Shown in composition graphs 3-7, above-mentioned locking plug screw 1 comprises cylindrical plug screw main body 11, the outer peripheral face of plug screw main body 11 is provided with the external screw thread 12 matched with upper internal threaded 25, and in the U-type groove of every root pedicle nail 2,23 have all been threaded a locking plug screw 1; The outer peripheral face of each plug screw main body 11 is provided with cyclic spring deformation in the below of external screw thread 12 and stores power groove 13; Two locking plug screws 1 have end that cyclic spring deformation stores power groove 13 respectively with two matching ends of Orthopedic rod 3, and two of Orthopedic rod 3 ends to be locked in two U-type groove 23 respectively.
That is, this nail rod fixed system, comprises two pedicle nails, 2, Orthopedic rod 3 and two locking plug screws 1.All be threaded in the U-lag 23 of every root pedicle nail 2 a locking plug screw 1, and two ends of Orthopedic rod 3 are connected in two U-lags 23, and be locked in two U-lags 23 two of Orthopedic rod 3 ends respectively by two locking plug screws 1.
As shown in Fig. 3-7 and Fig. 9-12, each cyclic spring deformation stores power groove 13 and comprises and store power groove lower wall 14, two store power groove lower wall 14 and are engaged on two ends of Orthopedic rod 3 respectively, two locking plug screws 1 rotate respectively and move down and be arranged in two U-type groove 23, the each power of storing groove lower wall 14 be subject to from Orthopedic rod 3 along the axially stress M vertically upward of plug screw main body 11 with from the axially stress F vertically downward of upper internal threaded 25 along plug screw main body 11, two store power groove lower wall 14 and respectively elastic deformation occur, and two of Orthopedic rod 3 ends are locked in two U-type groove 23 respectively.
As mentioned above, when in the U-lag 23 that locking plug screw 1 screws in pedicle nail top 21, the female thread 25 on pedicle nail top 23 can produce downward stress F, correction stick 3 can produce stress M upwards, along with in locking process, turning moment T(is about 10Nm) increase, cyclic spring deformation bottom locking plug screw 1 stores the power that stores groove lower wall 14 place of power groove 13, due to the effect of internal stress, this can be made to store power groove lower wall 14 and produce elastic deformation.After removing torque T, this elastically-deformable existence makes locking plug screw 1 bear axial pressure, namely add the frictional force between the upper internal threaded 23 of pedicle nail 2 and the external screw thread 12 of locking plug screw 1, too increase the frictional force between locking plug screw 1 and Orthopedic rod 3.When the vibration that top screw thread is continued with when impacting external force, external force loosens although instantaneously may be greater than frictional force between screw thread, produce trace, but due to the existence of the elastically-deformable power of storing groove lower wall 14, pretightning force can not significantly reduce, but the trace making up locking plug screw 1 by the insubstantial loss of elastic deformation and internal stress loosens, thus the pretightning force maintained between locking plug screw 1 and pedicle nail 2, and then maintain the frictional force between screw thread, effectively prevent 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, is connected with circular cylindrical cavity 16 below hexagon cavity 15, the upper and lower surface of hexagon cavity 15 and the through plug screw main body 11 of circular cylindrical cavity 16.Above-mentioned pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 form by titanium alloy material manufacture, the tensile strength of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 is all greater than 900MPa, and the Proof strength of non-proportional of pedicle nail 2, Orthopedic rod 3 and locking plug screw 1 is all 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, the weight of structure can be alleviated further, reduce the weight of implant entirety.
Preferably, the multiple locking plug screw 1 of many pedicle nails 2 and cooperation corresponding to many pedicle nails 2 is included in this spine nail rod fixed system, all be connected with a locking plug screw 1 in the described U-type groove 23 of every root pedicle nail 2, above-mentioned many pedicle nails 2 are corresponding to be engaged on Orthopedic rod 3.Namely the number of locking plug screw 1 is corresponding equal with the number of pedicle nail 2, all be threaded a locking plug screw 1 in the U-type groove 23 of every root pedicle nail 2, many pedicle nails 2 are engaged on Orthopedic rod 3 side by side, can be connected with vertebra by multiple spot in use, play fixing conjunction supporting role, improve the stability that system connects.
This spine nail rod fixed system can two use side by side, namely make two Orthopedic rod 3 arranged in parallel, to improve overall construction intensity.
The locking plug screw of one provided by the invention, spine nail bar fixing device and spine nail rod fixed system, its locking principle processes a cyclic spring deformation in locking plug screw lower edge to store power groove, produces enough large stress and elastic deformation to reach locking object when locking by plug screw main body.In the present invention, cyclic spring deformation stores the size of size shape according to locking plug screw of power groove, shape and material and designs; The screw thread of locking plug screw and pedicle nail can carry out being 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, other modification some can also be made, also should be considered as protection scope of the present invention.
Claims (9)
1. a locking plug screw, comprises cylindrical plug screw main body, and the outer peripheral face of described plug screw main body is provided with external screw thread,
It is characterized in that, the outer peripheral face of described plug screw main body is provided with a cyclic spring deformation in described externally threaded below and stores power groove.
2. the locking plug screw of one according to claim 1, is characterized in that, this locking plug screw is formed by 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. the locking plug screw of one according to claim 1, it is characterized in that, the inside of described plug screw main body is provided with hexagon cavity, is connected with circular cylindrical cavity below described hexagon cavity, the upper and lower surface of described hexagon cavity and the through described plug screw main body of described circular cylindrical cavity.
4. a spine nail bar fixing device, comprises pedicle nail, Orthopedic rod and locking plug screw,
The pedicle nail bottom that described pedicle nail comprises pedicle nail top and is connected with described pedicle nail top, described pedicle nail top is provided with U-type groove, is provided with upper internal threaded in described U-type groove, 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-type groove;
Described locking plug screw comprises cylindrical plug screw main body, the outer peripheral face of described plug screw main body is provided with the external screw thread matched with described upper internal threaded, and described locking plug screw is threaded in described U-type groove;
It is characterized in that, the outer peripheral face of described plug screw main body is provided with a cyclic spring deformation in described externally threaded below and stores power groove;
Described locking plug screw has the end that described cyclic spring deformation stores power groove to match with described Orthopedic rod, and described Orthopedic rod is locked in described U-type groove.
5. a kind of spine nail bar fixing device according to claim 4, is characterized in that, described cyclic spring deformation stores power groove and comprises and store power groove lower wall, described in store power groove lower wall and be engaged on the end of described Orthopedic rod,
Described locking plug screw rotates and moves down and be arranged in described U-type groove, the described power of storing groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body with from the axially stress vertically downward of described upper internal threaded along described plug screw main body, the described power of storing groove lower wall generation elastic deformation, and the end of described Orthopedic rod is locked in described U-type 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 titanium alloy material manufacture, the tensile strength of described pedicle nail, Orthopedic rod and locking plug screw is all greater than 900MPa, and the Proof strength of non-proportional of described pedicle nail, Orthopedic rod and locking plug screw is all 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 hexagon cavity, circular cylindrical cavity is connected with, the upper and lower surface of described hexagon cavity and the through described plug screw main body of described circular cylindrical cavity below described hexagon cavity.
8. a spine nail rod fixed system, comprises two pedicle nails, an Orthopedic rod and two locking plug screws,
The pedicle nail bottom that pedicle nail described in every root includes pedicle nail top and is connected with described pedicle nail top, described pedicle nail top is provided with U-type groove, be provided with upper internal threaded in described U-type 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-type groove of a described pedicle nail, and another end of described Orthopedic rod is connected to the bottom of the described U-type groove of pedicle nail described in another root;
Described locking plug screw comprises cylindrical plug screw main body, the outer peripheral face of described plug screw main body is provided with the external screw thread matched with described upper internal threaded, and be all threaded in the described U-type groove of pedicle nail described in every root a described locking plug screw;
It is characterized in that, the outer peripheral face of each described plug screw main body is provided with a cyclic spring deformation in described externally threaded below and stores power groove;
Two described locking plug screws have end that described cyclic spring deformation stores power groove respectively with two matching ends of described Orthopedic rod, and two of described Orthopedic rod ends to be locked in two described U-type groove respectively.
9. a kind of spine nail rod fixed system according to claim 8, is characterized in that, each described cyclic spring deformation stores power groove and comprises and store power groove lower wall, stores power groove lower wall and be engaged on two ends of described Orthopedic rod respectively described in two,
Two described locking plug screws rotate respectively and move down and be arranged in two described U-type groove, store described in each power groove lower wall be subject to from described Orthopedic rod along the axially stress vertically upward of described plug screw main body with from the axially stress vertically downward of described upper internal threaded along described plug screw main body, store power groove lower wall described in two and respectively elastic deformation occurs, and two of described Orthopedic rod ends are locked in two described U-type groove respectively.
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| 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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| 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 CN103431903A (en) | 2013-12-11 |
| CN103431903B true CN103431903B (en) | 2016-01-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| EP3441028B1 (en) | 2017-08-08 | 2021-10-06 | Biedermann Technologies GmbH & Co. KG | Receiving part and instrument for holding the receiving part |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0870474A1 (en) * | 1996-08-07 | 1998-10-14 | Bioprot, S.A. | Improvements to devices for fixing and correcting dorsal vertebrae |
| 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 |
-
2013
- 2013-09-03 CN CN201310393993.9A patent/CN103431903B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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|---|---|
| CN103431903A (en) | 2013-12-11 |
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Address after: 101407 Beijing city Huairou District Yanqi Economic Development Zone No. 3 South Street Patentee after: Stagecoach Satsuma medical equipment (Beijing) Co., Ltd. Address before: 101407 Beijing city Huairou District Yanqi Economic Development Zone No. 3 South Street Patentee before: Beijing Fito Lanvie Medical Co., Ltd. |
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