CN104546100B - Dynamic compression locking plate for treatment of femoral neck fracture - Google Patents
Dynamic compression locking plate for treatment of femoral neck fracture Download PDFInfo
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- CN104546100B CN104546100B CN201410458654.9A CN201410458654A CN104546100B CN 104546100 B CN104546100 B CN 104546100B CN 201410458654 A CN201410458654 A CN 201410458654A CN 104546100 B CN104546100 B CN 104546100B
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- screw hole
- pressurization
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- 208000020089 femoral neck fracture Diseases 0.000 title claims abstract description 16
- 230000006835 compression Effects 0.000 title abstract description 22
- 238000007906 compression Methods 0.000 title abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 70
- 239000010959 steel Substances 0.000 claims abstract description 70
- 210000000527 greater trochanter Anatomy 0.000 claims abstract description 7
- 210000001694 thigh bone Anatomy 0.000 abstract 1
- 208000010392 Bone Fractures Diseases 0.000 description 40
- 206010017076 Fracture Diseases 0.000 description 40
- 210000000689 upper leg Anatomy 0.000 description 28
- 210000003739 neck Anatomy 0.000 description 27
- 210000002436 femur neck Anatomy 0.000 description 12
- 210000000988 bone and bone Anatomy 0.000 description 10
- 238000010586 diagram Methods 0.000 description 8
- 230000035876 healing Effects 0.000 description 4
- 210000003484 anatomy Anatomy 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 208000007875 Femur Head Necrosis Diseases 0.000 description 2
- 208000031481 Pathologic Constriction Diseases 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 210000003141 lower extremity Anatomy 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 210000001215 vagina Anatomy 0.000 description 2
- 206010020649 Hyperkeratosis Diseases 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004520 agglutination Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037182 bone density Effects 0.000 description 1
- 230000001054 cortical effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000036244 malformation Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
- 230000011164 ossification Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/80—Cortical plates, i.e. bone plates; Instruments for holding or positioning cortical plates, or for compressing bones attached to cortical plates
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- 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, setting implements or the like
- A61B17/68—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin
- A61B17/84—Fasteners therefor or fasteners being internal fixation devices
- A61B17/86—Pins or screws or threaded wires; nuts therefor
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- Health & Medical Sciences (AREA)
- Orthopedic Medicine & Surgery (AREA)
- Surgery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Neurology (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
The invention provides a dynamic compression locking plate for treatment of femoral neck fracture. The dynamic compression locking plate comprises a locking steel plate, three screw holes formed in the locking steel plate, and screws, wherein the inner surface of the locking steel plate is in a bent shape matched with the shape of the lower part of the greater trochanter of the thigh bone; the three screw holes in the locking steel plate are compression locking screw holes; the three compression locking screw holes take a location point A in the middle of the locking steel plate as a reference and are distributed around the location point in a triangular manner; the axes of the three compression locking screw holes are parallel, the axial lines of the three compression locking screw holes are inclined upwards by taking a vertical line AO, where the location point A is located, of the locking steel plate as a reference, and the longitudinal included angle theta between the axial line of each compression locking screw hole and the vertical line AO is 5-35 degrees; each compression locking screw hole comprises a screw hole in the upper layer and a tapered hole or semispherical unthreaded hole in the lower layer; the corresponding screws are compression screws, each of which comprises a thread section in the front, a polished rod section in the middle and a tapered or semispherical unthreaded screw head in the head; the end surface of each unthreaded screw head is a plane and is provided with a screwdriver compression notch in the center; each screw also comprises a locking jackscrew corresponding to a threaded hole in the upper layer of each compression screw hole.
Description
Technical field
The present invention relates to a kind for the treatment of of femoral neck fracture dynamic pressurization lockplate, for treating fracture of femoral neck, belong to doctor
Use orthopedic instrument.
Background technology
The Therapeutic Method of fracture of femoral neck is divided into expectant treatment and operative treatment, for labile fracture of femoral neck,
Typically all adopt operative treatment, for the patient of less than 65 years old, how internal fixation treatment is added using operative reduction.Femoral neck bone at present
Adopting three pieces of hollow screw technique for fixing folding internal fixation treatment more.Inserting needle from femoral bone tuberosity, through femoral trochanteric, neck of femur
Portion, to femoral head, reaches fixing fracture site effect.The fixing fracture site although this technology can be pressurizeed, due to three
Piece hollow screw does not interrelate, and does not also have other to support and fixing, exists clearly disadvantageous: 1, stable type is poor, three pieces of skies
The anti-rotational force of heart screw and twisting resistance are poor, easily produce femoral head displacement, lead to neck of femur disunion or bone malformation healing；
2nd, generation femur head necrosiss ratio at a specified future date is higher；3rd, in the agglutination of neck of femur, easily produce the shortening of neck of femur, lead to
Fixing pin exits and shortens with lower limb, impact walking；4th, need lying up it is impossible to early loading is taken exercise of long period.
For this reason, occurring in that the treatment of femoral neck fracture locking steel plate in four or five holes, such as Application No.
201110282480.1 treatment of femoral neck fracture locking steel plate.The support section of this locking steel plate has one to two piece of screw and bone
Folding far-end (be centrifuged dirty remote one end, i.e. tuberosity part one end) skeletal fixation, make fracture near-end (near the near fracture end of heart,
I.e. femoral head end), far-end, locking steel plate and lock screw be integrally formed, be a stable fixation, but this fixation be to fracture
The broken ends of fractured bone does not pressurize fixation, and fracture site is a kind of static fixing, blocks the conduction of power, is unfavorable for the thorn of fracture site power
Swash and callus growth, fracture site easily produces the absorption of bone and causes bone does not connect.
Content of the invention
The purpose of the present invention is to design a kind for the treatment of of femoral neck fracture dynamic pressurization lockplate, makes the fracture of femoral neck broken ends of fractured bone be
Energy pressurization, and can axial lock support, it is that a kind of power is fixed simultaneously again, fixing stable type and reliability in raising neck of femur
While property, adapt to the dynamic pressurization feature of osteogenesis again, be more beneficial for the healing of fracture site.
Technical scheme: the treatment of femoral neck fracture dynamic pressurization lockplate of the present invention includes locking steel plate, lock
Determine three screw holes, screws on steel plate, locking steel plate inner surface is in the curved shape mating with femoral greater trochanter lower shape,
Three screw holes on its locking steel plate are locking and pressurizing screw hole, the first locking and pressurizing screw hole, the second locking and pressurizing screw
Hole, the position of the 3rd pressurization screw hole are on the basis of an anchor point a in the middle part of locking steel plate, and around anchor point a, the
One locking and pressurizing screw hole, the second locking and pressurizing screw hole, the 3rd pressurization screw hole are triangular in shape point on locking steel plate
Cloth, the axle of three locking and pressurizing screw holes is parallel, on the basis of the vertical line ao of locking steel plate at anchor point a place, three pressurizations
The axis inclined upwards of screw hole, longitudinal angle θ=5～35 ° with vertical line ao；Three locking and pressurizing screw holes include
Lower two-layer, upper strata is screw, and lower floor is taper or hemispherical unthreaded hole；Corresponding screw is forcing screw, including anterior screw
The taper of section, the light bar segment at middle part and head or hemispherical non-threaded ailhead, non-threaded ailhead end face is in plane, and there is screw in central authorities
Knife pressurization recess；Also have the screw corresponding locking jackscrew with forcing screw hole upper strata, around locking jackscrew be and lock screw
The screw thread of the screw coupling on hole upper strata, there is screwdriver locking recess locking jackscrew upper end, and lower end is plane.
Described anchor point a is located at centered on locking steel plate geometric center, diameter is in the range of 2mm.
The first described locking and pressurizing screw hole in the lower section of anchor point a, with anchor point a apart from r1=7～12mm；With
The line of anchor point a and the first locking and pressurizing screw hole is lockplate datum line b-b, and the second locking and pressurizing screw hole is in anchor point
Angle α=60～90 ° of a back upper place, the second locking and pressurizing screw hole and lockplate datum line b-b, the second locking and pressurizing screw
Hole and anchor point a are apart from r2=4～8mm；3rd pressurization screw hole is in anchor point a front upper place, the 3rd locking and pressurizing spiral shell
Angle β=10～40 ° of nail and lockplate datum line b-b, the 3rd screw hole and anchor point a apart from r3=7～
12mm.
Length l1=32 of described locking steel plate～40mm；Width l2=22～28mm.
Described three screw hole centers and locking steel plate face antermarginal apart from l3=7～12mm, locking steel plate three
The outer periphery of screw hole is arc-shaped, is interior camber line nature easement curve between the arc-shaped of three screw holes.
Depth h2=2.0～the 4.5mm of the upper strata screw of three described locking and pressurizing screw holes, lower floor is taper or half
Depth h1=3 of spherical unthreaded hole～4.5mm；Thickness h=2.5～the 3.5mm of corresponding locking jackscrew.
Length s1=16～the 20mm of the anterior screw section of three described screws, length s2=50 of the light bar segment at middle part
～100mm, the height s3=3～4.5mm of taper or hemispherical non-threaded ailhead.
Advantages of the present invention: one, the present invention is by three pieces of capital forcing screws of connection of locking and pressurizing screw hole
Position is the anatomical structure and biomechanical principle design according to neck of femur, three screw fixed positions after preferably,
There is preferable fixing intensity to fracture of femoral neck；2nd, the present invention adopts cannulated compression screw, locking steel plate main body and locking nail
Silk, three becomes an entirety after tightening, fracture of femoral neck is had stable pressurization support fixation；3rd, the three pieces of skies adopting
Heart forcing screw is half tooth screw, does not have screw thread and skeleton to tighten fixation in the far-end of fracture, three pieces of screws are parallel, make bone
The fixation at end of fractureing is that a kind of power is fixed, and is conducive to the compression of fracture site to heal, can lower nonunion rate and femur
Head necrosis rate；The displacement of neck of femur and the malunion of lower limb can also be reduced；Fracture can be accelerated with early functional exercise simultaneously
Healing.
1 and the comparison of the three pieces of Treatment of Femoral Neck Fractures with Cannulated Screw Fixations commonly used at present, the present invention three connect capital plus
The position of pressure screw hole is the anatomical structure and biomechanical principle design according to neck of femur, and one piece of forcing screw is located at
The lower section stress side of neck of femur, one piece of front upper place tension side being located at neck of femur, one piece of rear being located at neck of femur is slightly elevated, plus
The position that pressure screw is fixed is all neck of femur bone density highest and time high-order bit；Three pieces of forcing screw institute's shapes in neck of femur
The length of side of the triangle becoming can be larger；Forcing screw and locking steel plate pass through the locking of locking nail silk and form an entirety, make pressurization
The anti-rotational force of lock screw and twisting resistance greatly enhance.The three pieces of skies commonly used more at present using fixed fracture of femoral neck of the present invention
Heart screw resected femur neck is more stable, and using three pieces of hollow nail resected femur necks, the active force of screw is scattered, hollow screw
Position and direction randomness larger, the anti-rotational force of three pieces of hollow screws and twisting resistance poor, easily produce fractured bones and fracture
End is unstable and shifts, and affects union of fracture.
2 compared with having the fixing lockplate of screw at femoral shaft position, and the present invention uses to the proximal femoral head of fracture
Three pieces of cannulated compression screw are fixed, and three pieces of cannulated compression screw are half dental structures, and cannulated compression screw has spiral shell in the near-end of fracture
Stricture of vagina tightens fixation, and the far-end in fracture and skeleton are not screwed, but completes after pressurization with locking through locking steel plate
Jackscrew completes after tightening to lock fixation together with locking steel plate.Three pieces of screws are parallel, the axial direction of its axial direction and neck of femur
Close to consistent, fracture site can in the axial direction of screw sliding compression, the fixation making fracture site is that a kind of power is solid
Fixed, there is no stress shielding, be conducive to fracture growth of spur and healing.In addition, with four pieces or five pieces of lock screw locking steel plates
Relatively, because the length of this neck of femur power locking steel plate is shorter less, thus wound can be less, damages also little.
3rd, the present invention is that locking and pressurizing steel plate is placed in greater trochanter external lower margin, by the locking steel being placed on locking and pressurizing hole
Plate guider, three pieces of Kirschner wires are squeezed into the position being pre-designed in neck of femur, the length of the required fixing screws of pressurizeing of measurement, will
Three pieces of pressurization fixing screws are screwed in femoral head neck by locking and pressurizing steel plate nail, and so that fracture site is pressurizeed, then three
Piece locking jackscrew be screwed in locking and pressurizing hole, make forcing screw and locking and pressurizing steel plate locking formed an entirety, reach pressurization
Lock support acts on.
4th, the position of three pieces of lock screw of locking steel plate of the present invention and direction are designed according to the anatomical structure of neck of femur,
As long as the position of one piece of screw is correct, in addition the position specified just easily squeezed into by two pieces of screws, easy and simple to handle.
5th, the anterior screw section of three pieces of screws of the present invention and the cooperation of non-threaded ailhead, to femoral neck bone during being screwed into
There is pressurization fixation at the end that fractures.The pressurized three pieces of screws fixing can be locked in locking steel plate by three pieces of locking jackscrews
On, make locking steel plate, screw, fracture site become an entirety, complete locking and pressurizing fixation, and this fixation and fracture
Far-end is not screwed, and hence without stress shielding, when bearing a heavy burden, fracture site can promote union of fracture with dynamic pressurization.
Brief description
Fig. 1 is the main structure diagram of the present invention.
Fig. 2 is the vertical structure schematic diagram of the present invention.
Fig. 3 is the structure enlarged diagram that three screw hole are taper.
Fig. 4 is three screw hole is hemispheric structure enlarged diagram.
Fig. 5 is jackscrew structural representation.
Fig. 6 is the overlooking the structure diagram of Fig. 5.
Fig. 7 is the present invention looks up structural representation of Fig. 5.
Fig. 8 is the lock screw structural representation that ailhead is taper.
Fig. 9 is ailhead is hemispheric lock screw structural representation.
Figure 10 is the use state cross-sectional schematic of the present invention.
Figure 11 is use state main structure diagram.
Specific embodiment
The explanation embodiment of the present invention below in conjunction with the accompanying drawings:
As shown in Figure 1, Figure 2: a kind for the treatment of of femoral neck fracture dynamic pressurization lockplate of the present invention includes locking steel plate 1, locking
Three screw holes on steel plate, screw 2 and jackscrew 3, locking steel plate 1 inner surface is in mate with femoral greater trochanter lower shape
Curved shape, three on locking steel plate 1 screw hole be locking and pressurizing screw hole: the first locking and pressurizing screw hole 1a, second plus
Pressure screw hole 1b, the position of the 3rd pressurization screw hole 1c are on the basis of an anchor point a in the middle part of locking steel plate, and
Around anchor point a, the first locking and pressurizing screw hole 1a, the second locking and pressurizing screw hole 1b, the 3rd pressurization screw hole 1c tri-
The distribution triangular in shape on locking steel plate 1 of individual locking and pressurizing screw hole, the axle of three locking and pressurizing screw holes is parallel, with anchor point
On the basis of the vertical line ao of locking steel plate 1 at a place, the axis inclined upwards of three locking and pressurizing screw holes, vertical with vertical line ao
To angle theta=5～35 °；Three locking and pressurizing screw holes include upper and lower two-layer, and upper strata is screw, and lower floor is taper or hemispherical
Unthreaded hole；Corresponding screw 2 is forcing screw, including anterior screw section 2a, light bar segment 2b at middle part and the taper of head or half
Spherical non-threaded ailhead 2c, non-threaded ailhead 2c end face is in plane, and there is screwdriver pressurization recess 2d in central authorities；Also have and forcing screw
The screw corresponding locking jackscrew 3 on hole upper strata, is the screw thread mating with the screw on screw hole upper strata around locking jackscrew 3
3a, there is screwdriver locking recess 3b locking jackscrew 3 upper end, and lower end is plane 3c.
Described anchor point a is located at centered on locking steel plate 1 geometric center, diameter is in the range of 2mm.
First locking and pressurizing screw hole 1a in the lower section of anchor point a, with anchor point a apart from r1=7～12mm；To position
The line of point a and the first locking and pressurizing screw hole 1a is lockplate datum line b-b, and the second locking and pressurizing screw hole 1b is in anchor point
Angle α=60～90 ° of a back upper place, the line of the second locking and pressurizing screw hole 1b and anchor point a and lockplate datum line b-b,
Second locking and pressurizing screw hole 1b and anchor point a apart from r2=4～8mm；3rd pressurization screw hole 1c is before anchor point a
Top, the line of the 3rd pressurization screw hole 1c and anchor point a and angle β=10～40 ° of lockplate datum line b-b, the
Three screw hole 1c and anchor point a are apart from r3=7～12mm.
Length l1=32 of locking steel plate 1～40mm；Width l2=22～28mm.
Three screw hole centers and locking steel plate 1 face antermarginal apart from l3=7～12mm, 1 three screws of locking steel plate
The outer periphery in hole is arc-shaped, is interior camber line nature easement curve between the arc-shaped of three screw holes.Locking steel plate main body
Locking steel plate 1, cannulated compression screw 2 and locking nail silk 3 mostly are steel plate or titanium alloy sheet.
Fig. 8 be the forcing screw structural representation, Fig. 9 that ailhead is taper be ailhead be that hemispheric forcing screw structure is shown
It is intended to:
Length s1=16～the 20mm of screw section 2a of three screw 2 front portions, length s2=50 of light bar segment 2b at middle part
～100mm.Taper or the height s3=3～4.5mm of hemispherical non-threaded ailhead 2c.Non-threaded ailhead 2c end face is in plane, in
There is screwdriver pressurization recess 2d centre.
Fig. 3 be three screw hole be the structure enlarged diagram of taper, Fig. 4 be three screw hole be hemispherical
Structure enlarged diagram:
Taking the first locking and pressurizing screw hole as a example, the depth h2=2.0～4.5mm of the upper strata screw 1a2 of screw hole,
Lower floor is the depth h1=3～4.5mm of taper or hemispherical unthreaded hole 1a1.
Fig. 5, Fig. 6, Fig. 7 are jackscrew structural representations: be the spiral shell mating with the screw on screw hole upper strata around jackscrew 3
Stricture of vagina 3a, there is Torx screwdriver locking recess 3b upper end, and lower end is plane 3c, the thickness h=2.5～3.5mm of jackscrew 3.
Embodiment: locking steel plate divides big trumpet.
1st, large size: l1=35～40mm；Width l2=24～28mm；R1=9～12mm；R2=5～8mm；R3=9～
12mm；
2nd, small size: l1=32～35mm；Width l2=22～24mm；R1=7～9mm；R2=4～5mm；R3=7～
9mm；
Anterior screw segment length l1 of screw, polished rod segment length l2 at middle part, the taper of screw or hemispherical non-threaded nail
The height of head 2c, depth h2 of upper strata screw 1a2 of screw hole, lower floor are taper or depth h1 of hemispherical unthreaded hole 1a1
And the size of jackscrew etc. is all matched with locking steel plate model.
Figure 10, Figure 11 are use state structural representation: during use, first under fluoroscopic machine, so that fracture site is resetted, including
Normotopia resets and side position resets, and installs guider, locking steel plate is placed on three locking and pressurizing screw holes of locking steel plate
In femoral greater trochanter 7 outer below, mutually docile with the lower outside cortical bone of greater trochanter 7, under fluoroscopic machine, according to being arranged on lock
Determine guider, the angle of splay according to neck of femur and the top rake in the 3rd pressurization screw hole 1c on steel plate, pierced with electric drill
Kirschner wire, points to upper knuckle portion before neck of femur 5, is allowed in neck of femur, away from neck of femur the top and each about 5mm in foremost, gram
Family name's needle tip 3-5mm under articular surface, positive side position perspective position accurately, then under the guide of two other guider, pierces another
To the rear knuckle of neck of femur and lower knuckle position, three pieces of Kirschner wires are parallel, and measurement determines the length of forcing screw for outer two pieces of Kirschner wires
Degree, takes off the guider on locking steel plate, three locking and pressurizings screw hole 1c, 1b, 1a are screwed into three pieces on locking steel plate respectively
Cannulated compression screw, femoral neck bone fracture is compressed, then is screwed into three on the upper strata of three locking and pressurizings screw hole 1c, 1b, 1a
Piece locking nail silk, makes cannulated compression screw and locking steel plate locking, forms an entirety, take off Kirschner wire, complete fixing operation.
In figure: 4 is femur cadre, and 6 is femoral head.
The anchor point of the present invention is that axially total sectional view is an irregular triangle knuckle to strict foundation neck of femur
Shape and determine, the plane graph that is, neck of femur has section be one has before upper knuckle, the shape of bottom knuckle and rear portion knuckle
Shape, three knuckle edges are circular arc type, the shape being connected with long arc shape between knuckle and knuckle.Three forcing screw holes of selection are
First locking and pressurizing screw hole 1a, the second locking and pressurizing screw hole 1b, the 3rd pressurization screw hole 1c position will be corresponding to three
Individual knuckle, the present invention, by the axis inclined upwards in forcing screw hole on locking steel plate 1, makes three pieces of forcing screws in the first pressurization lock
Determine screw hole 1a, the second locking and pressurizing screw hole 1b, the 3rd pressurization screw hole 1c guide effect under, through neck of femur three
The place section scope area of individual knuckle, three locking and pressurizing screw hole resected femur cervical regions after preferably can reach with head
To more Stabilization, the displacement of fracture site can be prevented.
Screw section 2a of three pieces of screws front portions of the present invention and rear portion non-threaded ailhead 2c, to neck of femur during being screwed into
Fracture site has pressurization fixation.Three pieces of locking jackscrews can be by the pressurized three pieces of cannulated compression screw lockings fixing
On locking steel plate, make locking steel plate, screw, fracture site become an entirety, complete locking and pressurizing fixation, and this
Fixing and fracture far-end is not screwed, and hence without stress shielding, when bearing a heavy burden, fracture site can be promoted with dynamic pressurization
Enter union of fracture.
Claims (6)
1. a kind for the treatment of of femoral neck fracture dynamic pressurization lockplate, including three screws on locking steel plate (1), locking steel plate
Hole, screw (2), locking steel plate (1) inner surface be in the curved shape that mates with femoral greater trochanter lower shape it is characterised in that:
Three screw holes on locking steel plate (1) are locking and pressurizing screw hole, the first locking and pressurizing screw hole (1a), the second locking and pressurizing
Screw hole (1b), the position of the 3rd pressurization screw hole (1c) they are on the basis of an anchor point a in the middle part of locking steel plate, and fixed
Around a of site, the first locking and pressurizing screw hole (1a), the second locking and pressurizing screw hole (1b), the 3rd pressurization screw hole
(1c) in the upper distribution triangular in shape of locking steel plate (1), the axle of three locking and pressurizing screw holes is parallel, to lock at anchor point a place
On the basis of determining the vertical line ao of steel plate (1), the axis inclined upwards of three locking and pressurizing screw holes, the longitudinal angle θ with vertical line ao
=5～35 °；Three locking and pressurizing screw holes include upper and lower two-layer, and upper strata is screw, and lower floor is taper or hemispherical unthreaded hole；Right
The screw (2) answered is forcing screw, including anterior screw section (2a), the light bar segment (2b) at middle part and the taper of head or hemisphere
Shape non-threaded ailhead (2c), non-threaded ailhead (2c) end face is in plane, and there is screwdriver pressurization recess (2d) in central authorities；Also have and pressurization
The screw corresponding locking jackscrew (3) on screw hole upper strata, is to mate with the screw on screw hole upper strata around locking jackscrew (3)
Screw thread (3a), locking jackscrew (3) upper end have screwdriver locking recess (3b), lower end be plane (3c)；Three described pressurizations
Depth h2=2.0～the 4.5mm of the upper strata screw of screw hole, lower floor be taper or hemispherical unthreaded hole depth h1=3～
4.5mm；Thickness h=2.5～the 3.5mm of corresponding locking jackscrew (3).
2. treatment of femoral neck fracture dynamic pressurization lockplate according to claim 1 it is characterised in that: described anchor point
A is located at centered on locking steel plate (1) geometric center, diameter is in the range of 2mm.
3. treatment of femoral neck fracture dynamic pressurization lockplate according to claim 1 and 2 it is characterised in that: first pressurization
Screw hole (1a) in the lower section of anchor point a, with anchor point a apart from r1=7～12mm；With anchor point a and first pressurization
The line b-b of screw hole (1a) be lockplate datum line, the second locking and pressurizing screw hole (1b) anchor point a back upper place,
The line of the second locking and pressurizing screw hole (1b) and anchor point a and angle α=60～90 ° of lockplate datum line b-b, second adds
Pressure screw hole (1b) and anchor point a are apart from r2=4～8mm；3rd pressurization screw hole (1c) before anchor point a on
Side, the line of the 3rd pressurization screw hole (1c) and anchor point a and angle β=10～40 ° of lockplate datum line b-b, the
Three screw hole (1c) and anchor point a are apart from r3=7～12mm.
4. treatment of femoral neck fracture dynamic pressurization lockplate according to claim 1 and 2 it is characterised in that: locking steel plate
(1) length l1=32～40mm；Width l2=22～28mm.
5. treatment of femoral neck fracture dynamic pressurization lockplate according to claim 1 and 2 it is characterised in that: three screws
Hole center and locking steel plate (1) face antermarginal apart from l3=7～12mm, the outer periphery of (1) three screw hole of locking steel plate
For arc-shaped, it is interior camber line nature easement curve between the arc-shaped of three screw holes.
6. treatment of femoral neck fracture dynamic pressurization lockplate according to claim 1 and 2 it is characterised in that: described three
Length s1=16～the 20mm of the anterior screw section (2a) of individual screw (2), length s2=50 of the light bar segment (2b) at middle part～
100mm, the height s3=3～4.5mm of taper or hemispherical non-threaded ailhead (2c).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458654.9A CN104546100B (en) | 2013-09-13 | 2014-09-10 | Dynamic compression locking plate for treatment of femoral neck fracture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013104164913A CN103445849A (en) | 2013-09-13 | 2013-09-13 | Dynamic locking plate for treating fracture of neck of femur |
| CN201410458654.9A CN104546100B (en) | 2013-09-13 | 2014-09-10 | Dynamic compression locking plate for treatment of femoral neck fracture |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104546100A CN104546100A (en) | 2015-04-29 |
| CN104546100B true CN104546100B (en) | 2017-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013104164913A Pending CN103445849A (en) | 2013-09-13 | 2013-09-13 | Dynamic locking plate for treating fracture of neck of femur |
| CN201410458654.9A Active CN104546100B (en) | 2013-09-13 | 2014-09-10 | Dynamic compression locking plate for treatment of femoral neck fracture |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013104164913A Pending CN103445849A (en) | 2013-09-13 | 2013-09-13 | Dynamic locking plate for treating fracture of neck of femur |
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| CN (2) | CN103445849A (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103445849A (en) * | 2013-09-13 | 2013-12-18 | 勘武生 | Dynamic locking plate for treating fracture of neck of femur |
| CN106923899A (en) * | 2015-12-29 | 2017-07-07 | 肖珍云 | A kind of orthopaedics lock screw |
| CN105943147A (en) * | 2016-05-25 | 2016-09-21 | 广州中医药大学第附属医院 | A femoral neck fracture locking and fixing device and method |
| CN107789044A (en) * | 2016-09-05 | 2018-03-13 | 财团法人金属工业研究发展中心 | Bone is broken fixing device |
| CN107970063A (en) * | 2016-10-24 | 2018-05-01 | 李海洋 | A kind of multiple tooth bone plate |
| CN107411809B (en) * | 2017-05-18 | 2023-08-18 | 长春圣博玛生物材料有限公司 | Cross moment supports two nail devices |
| CN113893019A (en) * | 2021-10-20 | 2022-01-07 | 海南苏生生物科技有限公司 | Dynamic pressurizing device for bone wound repair |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1188086C (en) * | 2002-05-23 | 2005-02-09 | 霍新明 | Internal fixation steel plate for department of orthopedics |
| US7179260B2 (en) * | 2003-09-29 | 2007-02-20 | Smith & Nephew, Inc. | Bone plates and bone plate assemblies |
| CN2792426Y (en) * | 2005-04-21 | 2006-07-05 | 张荣魁 | Concentric hook-shaped fracture-setting plate |
| CN201022739Y (en) * | 2006-10-28 | 2008-02-20 | 创生医疗器械(江苏)有限公司 | Fracture setting board |
| CN201516082U (en) * | 2009-11-16 | 2010-06-30 | 陈唯宁 | Synchronous pressurizing lock plate |
| US20120191138A1 (en) * | 2011-01-21 | 2012-07-26 | Kiester P Douglas | Use of flexible bushings to promote healing and stable fracture compression in orthopedic trauma plates |
| CN103445849A (en) * | 2013-09-13 | 2013-12-18 | 勘武生 | Dynamic locking plate for treating fracture of neck of femur |
-
2013
- 2013-09-13 CN CN2013104164913A patent/CN103445849A/en active Pending
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- 2014-09-10 CN CN201410458654.9A patent/CN104546100B/en active Active
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| CN104546100A (en) | 2015-04-29 |
| CN103445849A (en) | 2013-12-18 |
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Address after: No. 288 Nanhai Avenue, National High tech Industrial Development Zone, Haikou City, Hainan Province, 570100 Patentee after: Hainan Jinyin Orthopedic Equipment Innovation Research Co.,Ltd. Address before: 570100 room a1-926, floor 5, building a, venture egg center, Haikou national high tech Zone, No. 266, Nanhai Avenue, Haikou City, Hainan Province Patentee before: Hainan Jinyin Orthopedic Instrument Co.,Ltd. |