[go: up one dir, main page]

WO2019047160A1 - Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire - Google Patents

Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire Download PDF

Info

Publication number
WO2019047160A1
WO2019047160A1 PCT/CN2017/101038 CN2017101038W WO2019047160A1 WO 2019047160 A1 WO2019047160 A1 WO 2019047160A1 CN 2017101038 W CN2017101038 W CN 2017101038W WO 2019047160 A1 WO2019047160 A1 WO 2019047160A1
Authority
WO
WIPO (PCT)
Prior art keywords
head
pedicle screw
connection adapter
connector
screw
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2017/101038
Other languages
English (en)
Chinese (zh)
Inventor
张巍
唐佩福
袁森
张�浩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/CN2017/101038 priority Critical patent/WO2019047160A1/fr
Publication of WO2019047160A1 publication Critical patent/WO2019047160A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B17/00—Surgical instruments, devices or methods
    • A61B17/56—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor
    • A61B17/58—Surgical instruments or methods for treatment of bones or joints; Devices specially adapted therefor for osteosynthesis, e.g. bone plates, screws or setting implements
    • A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
    • A61B17/70—Spinal positioners or stabilisers, e.g. stabilisers comprising fluid filler in an implant

Definitions

  • the present disclosure relates to the field of medical devices, and in particular to a connection adapter and a pedicle screw fixation system for a pedicle screw.
  • pedicle screws are widely used as a mature surgical device.
  • the rapid development of minimally invasive pedicle screw fixation in recent years has been widely used worldwide due to its small trauma and exact effect.
  • the main role of minimally invasive pedicle screw is to perform spinal reduction, stabilize the dynamic segment of the spine, promote the fusion of relevant segments, and also perform bone cement injection and fluid bone through pedicle screws. Bone grafting to achieve effective treatment of spinal injuries and fractures.
  • a plurality of universal pedicle screws can be disposed on the fixing rod of the anchor, and two fixing rods provided with pedicle screws are fixed by a transverse connector.
  • a minimally invasive bone grafting nail inserted into the vertebral body from the outside of the vertebral plate appears.
  • pedicle screw fixation generally needs to adapt to the human anatomy, while the structure of the traditional pedicle screw anchor is relatively fixed, resulting in its placement and placement.
  • the adjustment of the angle is relatively fixed, not flexible enough to adapt to different human anatomy, and thus may not achieve the best therapeutic effect.
  • connection adapter for attaching a pedicle screw to a conventional pedicle screw anchor.
  • connection adapter for connecting a pedicle screw to a connector, the connection adapter comprising:
  • An adapter body portion having a mating connection portion formed therein for engaging and connecting at least a portion of the connector
  • the mating connector includes a mating receptacle formed in the adapter body portion, the mating jack for mating and receiving at least a portion of the connector,
  • a plug receptacle for receiving the movable head is formed in the adapter body portion
  • the extending direction of the head insertion hole is perpendicular to the axial direction of the mating insertion hole.
  • the movable head includes a universal joint formed at an end of the movable head, the movable insertion hole including a first movable insertion hole portion, the universal joint portion being a ball head a shape in which a cross section of the first head insertion portion has a circular shape, and the first head insertion portion receives the universal joint portion.
  • the moving head includes a head body portion
  • the head insertion hole includes a second head insertion portion, a cross section of the head body portion and the second head insertion portion
  • the cross-sections each have an approximately racetrack shape, and the second head insertion portion receives the head body portion.
  • connection adapter includes a compression rod screw
  • mating connection portion includes a screw insertion hole formed in the adapter main body portion
  • the screw insertion hole extends in a direction perpendicular to an axial direction of the mating insertion hole, the screw insertion hole is in communication with the mating insertion hole, and an inner surface of the screw insertion hole is formed with a thread for Receiving the plunger rod.
  • the plunger screw includes a threaded end, the threaded end including at least one recess for engaging at least a portion of the connector.
  • connection adapter includes a lock nut, the movable head further including a locking thread formed on an outer surface of the head body portion, wherein the locking thread engages the lock nut .
  • the locking thread is formed on an end of the head body portion away from the universal joint.
  • the movable head further includes a through hole penetrating the living head along a length direction of the movable head, the through hole for fitting and connecting the pedicle screw.
  • connection adapter further includes a spacer having a through hole penetrating the thickness of the spacer, the through hole having a cross section in an approximately racetrack shape for receiving the head body unit.
  • a plurality of racks are formed on an upper surface of the head main body, and a plurality of mating racks are formed on at least a portion of a lower surface of the mat.
  • the mating rack is engaged with the rack to prevent the shim from sliding relative to the main body of the head.
  • a pedicle screw fixation system comprising: a holder, a connector, a connection adapter, and at least one first pedicle screw, wherein the connection adapter is for connecting the At least one first pedicle screw to the connector, the connector for connecting the connection adapter to the holder, the connection adapter being a connection adapter according to any of the above aspects or embodiments.
  • the fixture includes at least one second pedicle screw, the axis of the first pedicle screw forming a predetermined angle with the axis of the second pedicle screw.
  • connection adapter and the pedicle screw fixation system can be fixed to the connector through the connection adapter connection, thereby being fixed to the holder, and can be more compared with the conventional fixation system. Inserting the pedicle screw at a large angle or from the outside to accommodate different human anatomy Achieve better therapeutic results.
  • a connection adapter according to an embodiment of the present disclosure may be used to connect a support nail and a conventional pedicle screw system to form a space frame structure to enhance the surgical fixation effect.
  • FIG. 1 is a perspective view of a pedicle screw fixation system in accordance with an exemplary embodiment of the present disclosure
  • FIG. 2 is a front elevational view of a pedicle screw fixation system in accordance with an exemplary embodiment of the present disclosure
  • FIG. 3 is a perspective view of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 4 is a cross-sectional view of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 5 is a front elevational view of a first connection block of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 6 is a top plan view of a first connection block of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 7 is a partial cross-sectional view of a second connection block of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 8 is a top plan view of a second connection block of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 9 is a top plan view of a connecting rod of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure.
  • FIG. 10 is a front elevational view of a connecting rod of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 11 is a side view of a connecting rod of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 12 is a front elevational view of a locking screw of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 13 is a top plan view of a locking screw of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 14 is a top plan view of a tablet of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 15 is a front elevational view of a tablet of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 16 is a top plan view of a shim of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • 17 is a front elevational view of a shim of a pedicle screw connector, in accordance with an exemplary embodiment of the present disclosure
  • connection adapter 18 is a perspective view of a connection adapter in accordance with an exemplary embodiment of the present disclosure, schematically showing the connection of the connection adapter to a pedicle screw;
  • connection adapter 19 is a plan view of a connection adapter, schematically showing the connection of the connection adapter to a pedicle screw, in accordance with an exemplary embodiment of the present disclosure
  • 20 is a bottom view of an adapter body portion of a connection adapter, in accordance with an exemplary embodiment of the present disclosure
  • 21 is a front elevational view of an adapter body portion of a connection adapter, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 22 is a top plan view of an adapter body portion of a connection adapter, in accordance with an exemplary embodiment of the present disclosure
  • Figure 23 is a cross-sectional view of the adapter body portion taken along line B-B shown in Figure 22;
  • Figure 24 is a cross-sectional view of the adapter body portion taken along line A-A shown in Figure 21;
  • Figure 25 is a cross-sectional view of the adapter body portion taken along line C-C shown in Figure 23;
  • Figure 26 is an enlarged view of a portion I of Figure 24;
  • FIG. 27 is a front elevational view of a pressure bar screw connecting an adapter, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 28 is a front elevational view of a head of a connection adapter in accordance with an exemplary embodiment of the present disclosure
  • Figure 29 is a cross-sectional view of the movable head taken along line A-A shown in Figure 28;
  • FIG. 30 is a front elevational view of a lock nut of a connection adapter, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 31 is a front elevational view of a gasket connecting an adapter, in accordance with an exemplary embodiment of the present disclosure
  • FIG. 32 is a top plan view of a gasket connecting an adapter, in accordance with an exemplary embodiment of the present disclosure
  • Figure 33 is an enlarged view of a portion I in Figure 31.
  • FIG. 34 is a schematic illustration of a pedicle screw, in accordance with an exemplary embodiment of the present disclosure.
  • first the terms “first”, “second”, etc. may be used herein to describe various components, components, elements, regions, layers, and/or portions, but these components, components, components, regions, layers And/or parts should not be limited by these terms. Instead, these terms are used to distinguish one component, component, component, region, layer and/or portion from another.
  • a first component, a first component, a first component, a first region, a first layer, and/or a first portion discussed below may be referred to as a second component, a second component, a second component, a second region The second layer and/or the second portion, without departing from the teachings of the present disclosure.
  • FIG. 1 shows a schematic structural view of a pedicle screw fixation system according to an exemplary embodiment of the present disclosure.
  • the pedicle screw fixation system includes a fixture 2, a pedicle screw connector 4, a connection adapter 6, at least one first pedicle screw 8, and at least one second pedicle screw 24 .
  • the fixture 2 includes a fixation rod 21, a transverse connector 22 and a second pedicle screw 24.
  • the crossbar 22 includes a crossbar rod 221 and a cross connector joint 222.
  • the second pedicle screw 24 is fixedly attached to the fixed rod 21 by a locking screw 26.
  • the holder 2 includes two fixed rods 21.
  • the two fixed rods 21 are arranged in parallel and connected together by a transverse connector 22.
  • the cross connector 22 includes two transverse connector joints 222, two transverse connector joints 222 are respectively connected to the two fixed rods 21, and the transverse link rod 221 connects the two transverse connector joints 222 together.
  • the two fixing bars 21 are connected together.
  • the fixture 2 can include a plurality of second pedicle screws 24 disposed on the fixation rod 21.
  • four second pedicle screws 24 are provided on the fixed rod 21.
  • the present disclosure does not limit the number of pedicle screws 24, for example, in other embodiments, fewer (e.g., 2, 3) or more (e.g., 5, 6) may be placed on the fixed rod 21.
  • One or more) second pedicle screws 24 are fixedly attached to the fixed rod 21 by a respective locking screw 26.
  • the second pedicle screw 24 can be a U-shaped pedicle screw.
  • the second pedicle screw 24 can also be other types of screws, such as a straight pedicle screw.
  • the anchor can be selected from pedicle screw anchors or fixtures conventional in the art, for a more detailed configuration of the anchor, reference can be made to pedicles conventional in the art. The specific structure of the screw holder or the fixing device will not be described herein.
  • a fixation system according to an embodiment of the present disclosure further includes a connector 4 for additionally fastening the first pedicle screw 8 to the holder 2 , specifically, the attachment is fixed to the holder 2 .
  • the fixing rod 21 is on.
  • a predetermined angle a is formed between the axis of the first pedicle screw 8 and the axis of the second pedicle screw 24.
  • the predetermined angle ⁇ may range from 10° to 50°, and more specifically, in some examples, the predetermined angle ⁇ may be 15°, 20° or 30°.
  • a pedicle screw in a pedicle screw fixation system according to an embodiment of the present disclosure, can be fixed to a fixture by a connector connection, which can be placed at a larger angle or from a more outer side than a conventional fixation system.
  • the pedicle screw is described to adapt to different human anatomy, so that a better therapeutic effect can be achieved.
  • FIG. 3 is a perspective view of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 4 is a cross-sectional view of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure.
  • the connector 4 may include a first connecting portion 41 for releasably clamping on the pedicle screw holder 2, a connecting rod 42, the connecting rod 42 including the first first An end portion 421 and a second end portion 422 (shown in FIG. 10); and a second connecting portion 43 for detachably connecting to the first pedicle screw 8.
  • the first connecting portion 41 is detachably connected to the first end portion 421 of the connecting rod 42
  • the second connecting portion 43 is disposed at least at the second end of the connecting rod 42 On section 422.
  • the connector can be flexibly mounted on the pedicle screw holder.
  • the second connecting portion may be disposed at the second end of the connecting rod such that the first pedicle screw can be placed from a position relatively far from the holder so as to be able to be placed from the outer side
  • the pedicle screw is inserted to better adapt to different human anatomy, so that better therapeutic effect can be achieved.
  • the second attachment portion 43 includes vertical teeth 432 formed on an outer surface at at least a second end 422 of the connecting rod 42.
  • the direction in which the vertical teeth 432 extend is parallel to the axial direction A1 of the connecting rod 42 (as shown in FIG. 4).
  • the structure of the vertical teeth will be described in further detail below.
  • the first connecting portion 41 includes a first connecting block 411 and a second connecting block 412, and the first connecting block 411 and the second connecting block 412 are relatively movable to clamp or release the vertebral arch Root screw holder 2.
  • the connector 4 may further include a driving part 45 for driving the relative movement of the first connecting block 411 and the second connecting block 412.
  • the first connecting block 411 and the second connecting block 412 can clamp the fixing rod 21 of the pedicle screw holder 2;
  • the driving member 45 drives the first connecting block 411 and/or the second connecting block 412 to move away from each other, the first connecting block 411 and the second connecting block 412 can release the fixing rod 21 of the pedicle screw holder 2, thereby realizing the first A connecting portion 41 is releasably clamped to the fixing rod 21 of the pedicle screw holder 2.
  • the drive member includes a locking screw 45 that includes a threaded bore 4122 that can be threadedly engaged with the locking screw 45. In this manner, when the locking screw 45 moves in the threaded hole 4122, the second connecting block 412 can be driven to move toward or away from the first connecting block 411.
  • FIG. 5 is a front view of a first connection block of a pedicle screw connector according to an exemplary embodiment of the present disclosure
  • FIG. 6 is a first connection block of a pedicle screw connector according to an exemplary embodiment of the present disclosure.
  • Top view. 5 and 6, the first connecting block 411 includes an opposite first side 4111 and a second side 4112, the first side 4111 being closer to the connecting rod 42 than the second side 4112.
  • the first side surface 4111 is the right side surface of the first connection block 411
  • the second side surface 4112 is the left side surface of the first connection block 411.
  • the first connection block 411 may further include an engagement hole 4115 formed through the first side surface 4111 for receiving the first end portion 421 of the connecting rod 42.
  • the connector may further include a pressing piece 46 for pressing the first end portion 421 of the connecting rod 42 onto the first connecting block 411.
  • the first connection block 411 may further include an opposite first surface 4113 and a second surface 4114, which is closer to the second connection block 412 than the first surface 4113.
  • the first surface 4113 is the upper surface of the first connection block 411
  • the second surface 4114 is the lower surface of the second connection block 411.
  • the first connection block 411 further includes a tablet receiving portion 4116 formed in the first surface 4113, and the tablet receiving portion 4116 is for accommodating the pressing piece 46.
  • the cross-section of the tablet receiving portion 4116 may be in the shape of a dovetail, as shown in FIG.
  • FIG. 9 is a top plan view of a connecting rod of a pedicle screw connector according to an exemplary embodiment of the present disclosure
  • FIG. 10 is a front view of a connecting rod of a pedicle screw connector according to an exemplary embodiment of the present disclosure
  • 11 is a side view of a connecting rod of a pedicle screw connector according to an exemplary embodiment of the present disclosure.
  • the connecting rod 42 includes opposing first and second ends 421, 422.
  • the first connecting block 411 may further include a first through hole 4117 penetrating the connecting block 411 in an axial direction perpendicular to the connecting rod (ie, the A2 direction in FIG. 5).
  • FIG. 10 is a front view of a connecting rod of a pedicle screw connector according to an exemplary embodiment of the present disclosure
  • 11 is a side view of a connecting rod of a pedicle screw connector according to an exemplary embodiment of the present disclosure.
  • the connecting rod 42 includes opposing first and second ends 421, 422.
  • the connecting rod 42 includes a second through hole 423 formed at the first end portion 421 of the connecting rod 42, and the second through hole 423 penetrates the connecting rod 42 in a direction perpendicular to the axial direction of the connecting rod.
  • the first connecting block 411 and the connecting rod 42 are connected, the first through hole 4117 and the second through hole 423 are aligned, that is, the axis of the first through hole 4117 is aligned with the axis of the second through hole 423, and the locking screw 45 passes through.
  • the aligned first through hole 4117 and the second through hole 423 are then threadedly engaged with the threaded hole 4122 of the second connecting block 412, thereby achieving detachable connection of the connecting rod 42 with the first connecting portion 41.
  • FIG. 7 is a partial cross-sectional view of a second connection block of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 8 is a second connection block of a pedicle screw connector according to an exemplary embodiment of the present disclosure.
  • the second connecting block 412 includes a second connecting block main body portion in which a threaded hole 4122 and a through hole 4124 are formed, an axis of the threaded hole 4122 and a through hole 4124 The axes are aligned with each other.
  • the diameter of the through hole 4124 may be slightly larger than the diameter of the threaded hole 4122 to facilitate movement of the locking screw 45.
  • the first connection block 411 may include a first contact portion 4118 for contacting the fixing rod 21 of the pedicle screw holder 2, as shown in FIG. 5, the first contact portion 4118 is curved.
  • the second connection block 412 can include a second contact portion 4128 for contacting the fixation rod 21 of the pedicle screw fixture 2, as shown in Figure 7, the second contact portion 4128 being curved.
  • the arcuate first contact portion 4118 and the second contact portion 4128 cooperate to form a contact pedicle screw.
  • the connecting rod 42 includes a first end 421 and a second end 422.
  • a second through hole 423 into which the locking screw 45 is inserted is formed, and the second through hole 423 penetrates the connecting rod 42 in a direction perpendicular to the axial direction of the connecting rod.
  • a second connecting portion 43 is integrally formed.
  • the second connecting portion 43 is formed on the outer surface of the connecting rod 42.
  • the second connection portion 43 is formed at least on the outer surface of the second end portion 422 of the connecting rod 42.
  • the length of the connecting rod 42 is designed to be within a reasonable range.
  • the length of the connecting rod 42 is in the range of 20 mm to 100 mm.
  • the length of the connecting rod 42 is about 30 mm.
  • the connecting rod 42 is in a "three-stage" configuration, ie, as shown in FIG. 10, the connecting rod 42 includes a first stem portion 424, a second stem portion 425, and a third stem portion 426.
  • the first stem portion 424 includes the first end portion 421 described above, and the third stem portion 426 includes the second end portion 422 formed therebetween, and the second stem portion 425 is formed between the first stem portion 424 and the third stem portion 426.
  • the second through hole 423 is formed in the first rod portion 424.
  • the second connecting portion 43 is formed on the third rod portion 426, and a step portion 427 is formed between the second rod portion 425 and the third rod portion 426.
  • the second rod portion 425 and the third rod portion 426 each have a cylindrical shape, and the second rod portion 425 has a circular cross section of about 4 mm in diameter, and the third rod portion 426 has a cross section of about the diameter. 6mm round.
  • the second connecting portion 43 may include vertical teeth 432 formed on the outer surface of the connecting rod 42.
  • the extending direction of the vertical teeth 432 is parallel to the axial direction A1 of the connecting rod 42.
  • 30 vertical teeth 432 are evenly arranged along the circumferential direction thereof, that is, on the entire circumference of the outer surface of the connecting rod 42, uniformly distributed
  • Thirty vertical teeth 432, i.e., each adjacent two vertical teeth 432 are spaced apart by 12°.
  • the angle between the adjacent two tooth surfaces of each adjacent two vertical teeth 432 is about 60°, as shown in FIG. With such a vertical tooth design, the connection between the second connecting portion and other components can be made stronger.
  • the length of the second connecting portion 43 extending in a direction parallel to the axial direction A1 of the connecting rod 42 is equal to or greater than one-half of the length of the connecting rod 42.
  • the length of the connecting rod 42 is about 30 mm
  • the length of the second connecting portion 43 extends is about 20 mm.
  • the total length of the connecting rod 42 is about 30 mm
  • the length of the third rod portion 426 is about 20 mm
  • the length of the vertical teeth 432 extends is about 20 mm, that is, the vertical teeth 432 are on the outer surface of the entire third rod portion 426. Extend.
  • a connecting portion for connecting the first pedicle screw is formed on a majority of the length of the connecting rod, so that when the first pedicle screw is connected and fixed, it can be targeted to different human bodies.
  • the anatomical structure adjusts the placement of the first pedicle screw to better accommodate different human anatomy.
  • FIG. 12 is a front view of a locking screw of a pedicle screw connector according to an exemplary embodiment of the present disclosure
  • FIG. 13 is a top view of a locking screw of a pedicle screw connector according to an exemplary embodiment of the present disclosure.
  • the locking screw 45 can be a M4 x 0.5 type locking screw and is an inner six "petal" type screw.
  • the length of the locking screw 45 may range from 10 mm to 30 mm, for example, may be about 11 mm.
  • FIG. 14 is a top plan view of a tablet of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 15 is a front view of a tablet of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure.
  • the tab 46 can include a first side 461, a second side 462, a first surface 463, and a second surface 464.
  • the first side surface 461 and the first surface 463 of the pressing piece 46 are respectively connected to the first side surface 411 and the first surface 4113 of the first connecting block 411.
  • the second side 462 and the second surface 464 of the tablet 46 contact the sides and surfaces of the tablet receiving portion 4116, respectively.
  • the tab 46 may also include an engagement aperture 465 formed through the first side 461 of the tab for receiving the first end 421 of the connecting rod 42.
  • the pressing piece 46 may further include a through hole 467 penetrating the pressing piece 46 in the thickness direction of the pressing piece 46 (i.e., the direction A3 in Fig. 15).
  • the engagement hole 4115, the sheet receiving portion 4116, and the first through hole 4117 are in communication with each other.
  • the engaging hole 465 of the pressing piece 46 cooperates with the engaging hole 4115 of the first connecting block 411 to form a complete engaging hole to receive the connection.
  • the first end portion 421 of the rod 42; and the through hole 467 of the pressing piece 46 is engaged with the first through hole 4117 of the first connecting block 411 to form a complete through hole for the locking screw 45 to be inserted.
  • the cross-section of the tablet 46 may be in the shape of a dovetail. Accordingly, the cross section of the tablet receiving portion 4116 may be a dovetail shape as shown in FIG. With such a design, it is possible to ensure that the pressure piece is accurately positioned in the tablet receiving portion.
  • FIG. 16 is a top plan view of a shim of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure
  • FIG. 17 is a front view of a shim of a pedicle screw connector in accordance with an exemplary embodiment of the present disclosure.
  • the connector can also include a spacer 44 that can include a spacer through hole 442 for insertion of the locking screw 45. As shown in Figure 17, the spacer 44 can protrude upward.
  • the tablet 46 can also include a gasket receiving portion 466 for receiving the gasket 44.
  • a gasket receiving portion 466 for receiving the gasket 44.
  • the thickness of the tab 46 can be much greater than the thickness of the spacer 44.
  • the thickness of the tab 46 can be greater than at least twice the thickness of the spacer 44.
  • the thickness of the tab 46 can be about 2.5. Mm
  • the thickness of the spacer 44 may be about 0.3 mm.
  • connection adapter 6 for connecting the first pedicle screw 8 and the connector 4 .
  • connection adapter 6 may include an adapter body portion 61, a plunger screw 63, a movable head 64, a lock nut 65, and a spacer 66.
  • connection adapter 6 includes an adapter body portion 61 in which a fitting connection portion 62 is formed for fitting and connecting the second connection portion 43 of the connector 4.
  • the mating connection portion 62 includes a mating receptacle 621 formed in the adapter body portion 61 for receiving a second connection portion 43 formed on the connecting rod 42, for example, a vertical tooth 432 . That is, when the connecting rod 42 of the connector 4 is inserted into the mating jack 621, the axial direction of the mating jack 621 is parallel to the axial direction A1 of the connecting rod, and the vertical teeth 432 are inserted into the mating jack 621. The connector 4 and the connection adapter 6 can be engaged by the cooperation of the vertical teeth 432 and the mating jacks 621.
  • FIG. 27 is a front view of a plunger rod of a connection adapter according to an exemplary embodiment of the present disclosure.
  • the mating connecting portion 62 may further include a screw insertion hole 622 formed in the adapter main body portion 61.
  • the extending direction of the screw insertion hole 622 is perpendicular to the axial direction of the mating insertion hole 621, and the screw insertion hole 622 is
  • the mating jack 621 is in communication, and the inner surface of the screw jack 622 is formed with a thread for receiving the bar screw 63.
  • the second connecting portion 43 is inserted into the mating insertion hole 621, and the plunger screw 63 is screwed into the screw insertion hole 622 until the end portion of the plunger rod 63 contacts the second connecting portion 43 in this manner.
  • the connector 4 is connected to the connection adapter 6.
  • the plunger screw 63 includes a threaded end 631 that includes at least one recess 6312 for engaging the vertical tooth 432.
  • the recess 6312 receives the raised vertical teeth 432.
  • the plunger screw 63 can firmly press the connector 4 into the mating jack 621.
  • the threaded end 631 can include at least two recesses 6312 for engaging the vertical teeth 432, each recess 6312 receiving a raised vertical tooth 432, respectively.
  • the angle ⁇ between the opposing two surfaces of the recess 6312 can be about 120°, as shown in FIG.
  • the inner surface of the mating insertion hole 621 may be formed with a matching vertical tooth, the extending direction of the matching vertical tooth being parallel to the axial direction A1 of the connecting rod, the engaging vertical tooth engaging the vertical tooth 432 to make the connection
  • the connector 4 is better joined to the connection adapter 6.
  • connection adapter 6 includes a movable head 64.
  • the adapter main body portion 61 is formed with a movable insertion hole 611 for receiving the movable head 64.
  • the extension direction of the movable insertion hole 611 is perpendicular to the engagement insertion hole.
  • the movable head 64 includes a universal joint portion 641 formed at the end of the movable head.
  • the head jack 611 includes a first head jack portion 6111.
  • the universal joint portion 641 has a spherical head shape
  • the first movable head insertion portion 6111 has a circular cross section, and the first movable end insertion portion 6111 receives the universal joint portion 641.
  • the movable head 64 can be rotated in the adapter main body portion 61 at a wide range of angles.
  • the head 64 can also include a head body portion 642. Accordingly, the head jack 611 includes a second head jack portion 6112. In one example, the cross section of the head body portion 642 and the cross section of the second head insertion portion 6112 are both approximately racetrack-shaped, as shown in FIG. 29, the second head insertion portion 6112 receives the head body. Part 642.
  • the movable head 64 may further include a third through hole 644 that penetrates the universal joint portion 641 and the movable head main portion 642 along the longitudinal direction of the movable head 64.
  • the third through hole 644 receives the first pedicle screw 8, that is, the third through hole 644 is mated with the first pedicle screw 8 to connect the first pedicle screw 8 to the connection adapter 6.
  • the head 64 can also include a locking thread 6422 formed on the outer surface of the head body portion 642, as shown in FIG. A locking thread 6422 is used to engage the lock nut 65.
  • the locking thread 28 can be formed in the head body portion 642 It is away from one end of the universal joint portion 641.
  • the length of the locking thread 28 in the axial direction of the third through hole 644 may be in the range of 3 mm to 6 mm, for example, about 4.7 mm.
  • FIG. 30 is a front view of a lock nut of a connection adapter according to an exemplary embodiment of the present disclosure.
  • the lock nut 65 can be a hex nut.
  • the lock nut 65 can have an internal thread having a diameter of 8 mm to engage the locking threads 6422 formed on the outer surface of the head body portion 642.
  • the first pedicle screw 8 when the first pedicle screw 8 is inserted, the first pedicle screw 8 can be inserted into the third through hole 644, and then the movable head 64 can be rotated in the head main body portion 642 to be universally adjusted.
  • the lock nut 65 can be tightened on the locking thread 6422 to prevent the movable head 64 from rotating in the head main body portion 642, thereby fixing the first vertebra.
  • the "predetermined angle" herein may be a predetermined insertion angle designed according to different human anatomy.
  • FIG. 31 is a front view of a gasket of a connection adapter according to an exemplary embodiment of the present disclosure
  • FIG. 32 is a plan view of a gasket of the connection adapter according to an exemplary embodiment of the present disclosure
  • FIG. 33 is a portion of the portion I of FIG. Enlarged image.
  • the cross section of the spacer 66 has a shape similar to "raceway”.
  • the gasket 66 may have a through hole 662 extending through its thickness.
  • the cross section of the through hole 662 also has an approximate "racetrack" shape for receiving the head main body portion 642, that is, the shape and size of the through hole 662 are respectively associated with the movable head.
  • the shape and size of the main body portion 642 are matched.
  • a plurality of racks 6423 are formed on the upper surface of the head main body portion 642, and the extending direction of the racks 6423 is perpendicular to the axis of the head insertion hole 611.
  • a plurality of mating racks 663 are formed on at least a portion of the lower surface of the spacer 66, for example, the intermediate portion.
  • the rack 6423 has a rack parameter having a root radius R1 of about 6 mm, a addendum circle radius R2 of about 6.4 mm, and a tooth height H1 of about 0.4 mm between adjacent teeth.
  • the bottom width W1 of the recess is about 0.12 mm.
  • the mating rack 663 has the following rack parameters: the tip radius R1' is about 6 mm, the root radius R2' is about 6.4 mm, the tooth height H1' is about 0.4 mm, and the adjacent two teeth The bottom width W1' of the recess between them is about 0.12 mm.
  • the angle ⁇ 1 or ⁇ 1' between the opposing surfaces of the adjacent two teeth is about 60°, and the angle ⁇ 2 or ⁇ 2' between the adjacent two teeth is about 6°.
  • connection assembly which may include a connector 4 and a connection adapter 6.
  • the connector 4 may be a connector according to any one of the embodiments or examples described above.
  • the connection adapter 6 may be a connection adapter according to any of the above embodiments or examples.
  • the first pedicle screw 8 can be identical to the second pedicle screw 24. In certain embodiments, the first pedicle screw 8 can be different than the second pedicle screw 24.
  • FIG. 34 is a schematic illustration of a pedicle screw, in accordance with an exemplary embodiment of the present disclosure.
  • the first pedicle screw 8 can include a first threaded section 81, a second threaded section 83, a spacer section 82, a cylindrical section 84, and a staple tail 85.
  • the first pedicle screw 8 has a hollow hollow hollow cavity inside, the first thread segment 81 is located at the front end of the first pedicle screw 8, and the second thread segment 83 is located at the first pedicle screw 8 In the intermediate portion, the first thread segment 81 and the second thread segment 83 are spaced apart to form a non-threaded spacer segment 82.
  • the rear end of the second thread segment 83 is provided as a cylindrical section 84 and a nail tail 85 which are sequentially connected.
  • the first thread segment 81 has a conical shape, and the cross-sectional size of the first thread segment 81 gradually increases from front to back; the rear end of the first thread segment 81 smoothly transitions with the spacer segment 82,
  • the diameter of the second thread segment 83 is equal to the diameter of the rear end of the first thread segment 81.
  • Both the spacer 82 and the second thread segment 83 have a cylindrical configuration.
  • the taper ⁇ 3 of the cone of the first thread segment 81 is about 14°.
  • the rear end diameter of the first thread segment 81 and the major diameter of the second thread segment 83 are about 6 mm.
  • the pitch of the first thread segment 81 and the second thread segment 83 may be the same, for example both 2 mm. In another example, the pitch of the first thread segment 81 and the second thread segment 83 may be different.
  • the length of the first pedicle screw 8 (ie the length H2 in FIG. 34) may be 180 mm to 200 mm, for example 185 mm, 190 mm or 195 mm; the second thread segment 83 The distance from the rear end to the front end portion of the first pedicle screw 8 (i.e., the length L2 in Fig. 34) may be 35 mm to 55 mm, for example, 40 mm, 45 mm, 50 mm.
  • the direction of the insertion space can be conveniently adjusted at the time of nailing, and the holding force is provided by the second threaded section after the insertion, and the insertion is ensured.
  • the stability of the screw since the intermediate section is unthreaded, the direction of the insertion space can be conveniently adjusted at the time of nailing, and the holding force is provided by the second threaded section after the insertion, and the insertion is ensured.

Landscapes

  • Health & Medical Sciences (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Neurology (AREA)
  • Surgery (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Medical Informatics (AREA)
  • Molecular Biology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Surgical Instruments (AREA)

Abstract

La présente invention concerne un adaptateur de connexion (6), qui est utilisé pour connecter une vis pédiculaire (8) et un connecteur (4). L'adaptateur de connexion (6) comprend : une partie de corps principal d'adaptateur (61), une partie de mise en prise et de connexion (62) étant formée dans la partie de corps principal d'adaptateur (61) et étant utilisée pour mettre en prise et connecter au moins une partie du connecteur (4) ; et une tête mobile (64), la tête mobile (64) étant utilisée pour mettre en prise et relier la vis pédiculaire (8) ; la partie de mise en prise et de liaison (62) comprend un orifice d'insertion de mise en prise (621) qui est formée dans la partie de corps principal d'adaptateur (61), l'orifice d'insertion de mise en prise (621) étant utilisé pour mettre en prise et recevoir au moins une partie du connecteur (4) ; un orifice d'insertion de tête mobile (611) qui est utilisé pour recevoir la tête mobile (64) est formé dans la partie de corps principal d'adaptateur (61), et la direction d'extension de l'orifice d'insertion de tête mobile (611) est perpendiculaire à la direction axiale de l'orifice d'insertion de mise en prise (621). La présente invention concerne en outre un système de fixation à vis pédiculaire.
PCT/CN2017/101038 2017-09-08 2017-09-08 Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire Ceased WO2019047160A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/101038 WO2019047160A1 (fr) 2017-09-08 2017-09-08 Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2017/101038 WO2019047160A1 (fr) 2017-09-08 2017-09-08 Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire

Publications (1)

Publication Number Publication Date
WO2019047160A1 true WO2019047160A1 (fr) 2019-03-14

Family

ID=65634690

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2017/101038 Ceased WO2019047160A1 (fr) 2017-09-08 2017-09-08 Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire

Country Status (1)

Country Link
WO (1) WO2019047160A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0811356A2 (fr) * 1996-06-05 1997-12-10 Acromed Corporation Appareil de maintien rachidien
JPH11178838A (ja) * 1997-12-18 1999-07-06 Robert Reed Shokai:Kk 骨固定装置
US6685705B1 (en) * 2000-10-23 2004-02-03 Sdgi Holdings, Inc. Six-axis and seven-axis adjustable connector
CN202960732U (zh) * 2012-11-08 2013-06-05 天津正天医疗器械有限公司 椎弓根螺钉的内固定装置
CN106725821A (zh) * 2017-01-12 2017-05-31 福建省龙岩市第医院 正位x射线透视引导进钉的椎弓根螺钉导向器及导向方法
CN107518937A (zh) * 2017-09-08 2017-12-29 张巍 用于椎弓根螺钉的连接适配器和固定系统

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0811356A2 (fr) * 1996-06-05 1997-12-10 Acromed Corporation Appareil de maintien rachidien
JPH11178838A (ja) * 1997-12-18 1999-07-06 Robert Reed Shokai:Kk 骨固定装置
US6685705B1 (en) * 2000-10-23 2004-02-03 Sdgi Holdings, Inc. Six-axis and seven-axis adjustable connector
CN202960732U (zh) * 2012-11-08 2013-06-05 天津正天医疗器械有限公司 椎弓根螺钉的内固定装置
CN106725821A (zh) * 2017-01-12 2017-05-31 福建省龙岩市第医院 正位x射线透视引导进钉的椎弓根螺钉导向器及导向方法
CN107518937A (zh) * 2017-09-08 2017-12-29 张巍 用于椎弓根螺钉的连接适配器和固定系统

Similar Documents

Publication Publication Date Title
US12121274B2 (en) Bone fracture fixation clamp
JP4971195B2 (ja) 骨折治療用のプレート及びねじ
US8728080B2 (en) Spinal fixation plates and plate extensions
US8915944B2 (en) Rod and plate system for incremental reduction of the spine
EP1317215B1 (fr) Systeme de fixation posterieur
US5928233A (en) Spinal fixation device with laterally attachable connectors
US8262702B2 (en) Osteosynthetic clamp for attaching a bone anchor to a support rod
US20110282388A1 (en) Multi Axial Cross Link Connector System for Spinal Implants
JP2002527137A (ja) 安定性に優れた脊椎骨接合システム
US11406427B2 (en) Low profile connectors
WO2011004222A1 (fr) Système de vis pédiculaire
KR20090065528A (ko) 정형외과용 임플란트 어셈블리
CN106572870B (zh) 柔性上下颌骨固定装置
US8740947B2 (en) Multiple lead bone fixation apparatus
CN107582156B (zh) 用于椎弓根螺钉的连接器和固定系统
CN107518937A (zh) 用于椎弓根螺钉的连接适配器和固定系统
EP1919381B1 (fr) Appareil destiné à une fixation externe à l anneau pelvien
BG112250A (bg) Затягащи съединения за универсалнимодулнисистеми заостеосинтеза
US9763718B2 (en) Bone screw
US8672983B2 (en) Orthopedic plate system
WO2019047160A1 (fr) Adaptateur de connexion et système de fixation destiné à être utilisé avec une vis pédiculaire
CN209474772U (zh) 脊柱内固定系统
WO2019047158A1 (fr) Connecteur et système de fixation destinés à être utilisés avec une vis pédiculaire
CN105476704A (zh) 颈椎前路钢板固定系统
KR101166614B1 (ko) 정형외과용 플레이트 시스템

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17924258

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 17924258

Country of ref document: EP

Kind code of ref document: A1