CN109394325A - A kind of adjustable intramedullary nail and medical embedded fixed system - Google Patents
A kind of adjustable intramedullary nail and medical embedded fixed system Download PDFInfo
- Publication number
- CN109394325A CN109394325A CN201811258654.9A CN201811258654A CN109394325A CN 109394325 A CN109394325 A CN 109394325A CN 201811258654 A CN201811258654 A CN 201811258654A CN 109394325 A CN109394325 A CN 109394325A
- Authority
- CN
- China
- Prior art keywords
- angle adjusting
- adjusting piece
- intramedullary nail
- lag screw
- fitting
- 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.)
- Pending
Links
- 210000000689 upper leg Anatomy 0.000 abstract description 11
- 230000001225 therapeutic effect Effects 0.000 abstract description 7
- 238000002513 implantation Methods 0.000 description 15
- 210000003739 neck Anatomy 0.000 description 14
- 239000000463 material Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 210000000988 bone and bone Anatomy 0.000 description 5
- 210000002436 femur neck Anatomy 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 4
- 206010070917 Eccentric fixation Diseases 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 239000002639 bone cement Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000020089 femoral neck fracture Diseases 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 208000010392 Bone Fractures Diseases 0.000 description 1
- 206010017076 Fracture Diseases 0.000 description 1
- 208000001132 Osteoporosis Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000037118 bone strength Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 230000035876 healing Effects 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 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
- A61B17/72—Intramedullary pins, nails or other devices
-
- 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
- A61B17/72—Intramedullary pins, nails or other devices
- A61B17/7233—Intramedullary pins, nails or other devices with special means of locking the nail to the bone
Landscapes
- 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 discloses a kind of adjustable intramedullary nail and medical embedded fixed system, the adjustable intramedullary nail, including main nail have and offer the first duct on the first cavity and wall surface；Lag screw passes through the first duct；Angle adjusting piece is socketed on lag screw and can rotate in the first duct, and angle adjusting piece is able to drive institute's lag screw and does close to or far from the main rotation for following closely proximal end；Retaining mechanism is fixedly connected with main nail, and can be connected on angle adjusting piece, to realize the locking to angle adjusting piece.Above-mentioned adjustable intramedullary nail and medical embedded fixed system, due to adding angle adjusting piece and retaining mechanism, the position of lag screw can be adjusted according to itself stock neck condition of patient, can be suitble to a variety of different neck of femur angles, biomechanical property can be met, therapeutic effect is good and treatment cycle is short.
Description
Technical field
The present invention relates to medical instruments field more particularly to a kind of adjustable intramedullary nails and medical embedded fixed system.
Background technique
The intramedullary nail of Intertrochanter fracture of femur at present comprising main nail and lag screw.Intramedullary nail on the market, only main nail
Angle between lag screw is 125 degree and 135 degree of two types, and the angle is also to immobilize after being implanted into intramedullary nail
's.However, the femur neck angle of usual human body is generally at 120 degree due to femur neck angle all some differences of different patients
It is not the angle of 125 degree and 135 degree or bigger with both angle differences for those femur neck angles between 140 degree
It spends (such as 140 degree or 120 degree), the intramedullary nail of two kinds of above-mentioned angles just seems not applicable.
If patient use by force with itself unmatched intramedullary nail in femur neck angle, can make lag screw that cannot occupy simultaneously
In squeeze into femoral head and neck of femur, sometimes for guaranteeing lag screw squeezing into femoral head between two parties, and will appear across neck of femur
Lag screw the case where keeping to the side very much neck of femur wall very close to neck of femur wall or lag screw, drawn in this way, can only pass through to sacrifice
The intermediate degree of power screw and femoral head is too close to improve lag screw and neck of femur wall.However, such lag screw with
In the case that femoral head is not placed in the middle, when femoral head stress when strength (stand, squat down), lag screw and femoral head are due to inclined
The heart is fixed, it may appear that certain torque, this torque magnitude can become larger with the bigger of eccentric degree and stress, and then can force
Femoral head and femur rod have the tendency that rotation, and pole is unfavorable for the quick healing of fracture of neck of femur, influences therapeutic effect.
A kind of Intramedullary nail and fixed system that the patient suitable for different femur necks angle uses is needed as a result,.
Summary of the invention
In order to solve the above-mentioned technical problem, the purpose of the present invention is to provide a kind of adjustable intramedullary nails and medical embedded solid
Determine system.
The present invention is achieved through the following technical solutions:
On the one hand, a kind of adjustable intramedullary nail is provided, comprising:
Main nail, the main nail proximal end, which has, offers the first duct on the first cavity and wall surface；
Lag screw passes through first duct；
Angle adjusting piece is socketed on the lag screw and can rotate in first duct, the angle tune
Section part is able to drive institute's lag screw and does close to or far from the main rotation for following closely proximal end；
Retaining mechanism is at least partially disposed in first cavity, is fixedly connected with the main nail, and can be connected to institute
It states on angle adjusting piece, to realize the locking to the angle adjusting piece.
In the embodiment of the present invention, the retaining mechanism includes:
First fitting has the first bar portion and first end, and first end can be threadedly coupled with the main nail, and first
Bar portion can be connected on the angle adjusting piece, to realize the locking to the angle adjusting piece.
In the embodiment of the present invention, the retaining mechanism further include:
Locking member can be fixedly connected with the main nail；
Second fitting, between the locking member and angle adjusting piece, one end is connect with the locking member, the other end
It is connected on the angle adjusting piece.
In the embodiment of the present invention, the end on second fitting close to the angle adjusting piece opens up jagged, institute
Notch is stated for preventing interference angle adjusting piece rotation.
In the embodiment of the present invention, offered respectively on the locking member and second fitting for first fitting
The first through hole sequentially passed through and the second through-hole；
Be optionally provided with boss and groove on second fitting and the locking member, the two by the boss and
Groove is engaged by clamping.
In the embodiment of the present invention, second fitting is equipped with anti-rotating part, and the inner wall of the main nail is equipped with to be prevented with described
The matched anti-spin slot of rotating part.
In the embodiment of the present invention, at least one hollow slots, the length of the hollow slots are offered on the angle adjusting piece
Direction is not parallel to the direction for the abutting force that the angle adjusting piece is born.
In the embodiment of the present invention, the angle adjusting piece has the continuing surface accepting the retaining mechanism and abutting, Yi Jiyu
The loading end that the continuing surface is oppositely arranged and is in contact with first duct, the shape of the continuing surface are arcwall face, institute
It states loading end shape and the shape of first matching part in first duct matches.
In the embodiment of the present invention, the notch for abutting the lag screw is offered on the end face of the angle adjusting piece
Slot, the angle adjusting piece are the tube-in-tube structure that middle part is in waist-drum-shaped.
In the embodiment of the present invention, under the action of the angle adjusting piece, the axis and the pulling force of the main nail proximal end
The axis of screw distal end has angle theta, and the adjustable extent of the angle theta is 90 °~140 °.
On the other hand, a kind of medical embedded fixed system is provided, intramedullary nail and setting including any description above exist
The main nail distal end and the fastening screw for fixing the main nail.
Adjustable intramedullary nail and medical embedded fixed system of the invention, has the following beneficial effects:
1) due to adding angle adjusting piece and retaining mechanism, by angle adjusting piece be able to drive lag screw do it is close or
Rotation far from the main nail proximal end, the position of lag screw can be so adjusted according to itself stock neck condition of patient, is made
Obtaining lag screw or main nail can either squeeze between two parties, and can avoid lag screw and femoral head bring due to eccentric fixation occur
Problem.
2) the adjustable intramedullary nail and medical embedded fixed system can be by adjusting angle to be suitble to a variety of different femurs
Neck angle can meet biomechanical property, and therapeutic effect is good, and treatment cycle is short；Simultaneously without producing a plurality of different neck angles
Intramedullary nail, can greatly reduce inventory and the management of curable product, and general applicability is strong.
Detailed description of the invention
It, below will be to required in embodiment or description of the prior art in order to illustrate more clearly of technical solution of the present invention
The attached drawing used is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, right
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is the structural schematic diagram of adjustable intramedullary nail of the invention.
Fig. 2 is the configuration schematic diagram of adjustable intramedullary nail of the invention.
Fig. 3 is the cross-sectional view of the part-structure of adjustable intramedullary nail of the invention.
Fig. 4 is the partial internal structure schematic diagram of adjustable intramedullary nail of the invention.
Fig. 5 a and 5b are the structural schematic diagrams of the second locking member of the invention.
Fig. 6 a and 6b are the structural schematic diagrams of angle adjusting piece of the invention.
Fig. 7 is the structural schematic diagram of the lag screw of an embodiment of the present invention.
Appended drawing reference in figure:
The main nail of 100-, the first cavity of 110-, the first duct 120-, the anti-spin slot of 130-, the first matching part 140-, 150- second
Matching part；
200- lag screw, the first head 210-, the first tail portion 220-, the first screw thread of 230-, the first grooving of 240-；
300- angle adjusting piece, 310- hollow slots, 320- gap slot, 330- continuing surface, 340- loading end, 350- truncation
Face；
400- retaining mechanism, the first fitting of 410-, the first bar portion of 411-, 412- first end, 420- locking member, 421-
Boss, the second fitting of 430-, 431- groove, 432- notch, the anti-rotating part of 433-, 434- bearing surface.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, carries out to the technical solution in inventive embodiments clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, those of ordinary skill in the art's every other reality obtained without making creative work
Example is applied, shall fall within the protection scope of the present invention.
Shown in reference book attached drawing 1-4, a kind of adjustable intramedullary nail comprising main nail 100, lag screw 200, angle
Regulating part 300 and retaining mechanism 400.
Main nail 100 has proximally and distally, and 100 proximal ends of main nail, which have, offers the first hole on the first cavity 110 and wall surface
Road 120.
Lag screw 200 passes through the first duct 120, is used cooperatively with main nail 100, treats bone by being implanted into the patient
Folding.In present embodiment, the intramedullary nail constituted is preferably used in treatment fracture of neck of femur.
Angle adjusting piece 300 is socketed on lag screw 200 and can rotate in the first duct 120, angle adjusting piece
300, which are able to drive lag screw 200, does close to or far from the main rotation for following closely proximal end.
For retaining mechanism 400 for locking the angle adjusting piece 300, which is at least partially disposed in the first sky
It in chamber 110, is fixedly connected with main nail 100, and can be connected on angle adjusting piece 300, to realize to angle adjusting piece 300
Locking.
Above-mentioned adjustable intramedullary nail passes through angle adjusting piece 300 due to adding angle adjusting piece 300 and retaining mechanism 400
Lag screw 200 is able to drive to do close to or far from the main rotation for following closely proximal end, it so can be according to itself stock neck of patient
Condition adjusts the position of lag screw 200, so that lag screw 200 or main nail 100 can either be squeezed between two parties, and can avoid
The problem of existing lag screw 200 and femoral head are brought because of eccentric fixation.In addition, the adjustable intramedullary nail can be by adjusting angle
To be suitble to a variety of different neck of femur angles, biomechanical property can be met, therapeutic effect is good, and treatment cycle is short；Simultaneously without life
The intramedullary nail for producing a plurality of different neck angles, can greatly reduce inventory and the management of curable product, general applicability is strong.
In one embodiment, under the action of angle adjusting piece 300, the axis and lag screw 200 of main nail proximal end are remote
The axis at end has angle theta, and the adjustable extent of the angle theta is 90 °~140 °.Preferably, which can
For the arbitrary value in 120~140 °.Certainly, which can do corresponding adjusting according to practical application request.
In one embodiment, referring to fig. 2 shown in -4, retaining mechanism 400 may include the first fitting 410.First abuts
Part 410 has the first bar portion 411 and first end 412, and first end 412 can be threadedly coupled with main nail 100, the first bar portion
411 may be provided in the first cavity 110 and can be connected on angle adjusting piece 300.First fitting 410 can be connected to
On angle adjusting piece 300, to realize the locking to angle adjusting piece 300, to avoid angle adjusting piece 300 after the position is determined
Do unnecessary rotation.
The elastic slot of engagement tool screw-in can be offered in the tail end of first end 412.In this way, can be convenient by elastic slot
The first fitting 410 is screwed in or takes out, it is easy to use.Elastic slot can be flute profile of various shapes, may be, for example, inner polygon, interior
Circle etc. can match the common groove profile of existing tool.
In one embodiment, referring to fig. 2 and shown in 3, retaining mechanism 400 may also include locking member 420 and second and abut
Part 430.Locking member 420 may be provided in the first cavity 110, and can be fixedly connected with main nail 100.Second fitting 430 can
Between locking member 420 and angle adjusting piece 300, one end is connect with locking member 420, and the other end is connected to angle adjusting piece
On 300.
In a specific embodiment, the outer wall of locking member 420 can be equipped with external screw thread, and the inner wall of the first cavity 110 can be set
Have with the matched internal screw thread of the external screw thread be threadedly coupled so that locking member 420 and the first cavity 110 are realized.In this embodiment party
In formula, which can be locking nut.
In a specific embodiment, referring to shown in Fig. 5 a and 5b, selectivity on the second fitting 430 and locking member 420
Ground is equipped with boss and groove, and the two is engaged by clamping by boss and groove.In the present embodiment, it is set on the second fitting 430
Fluted 431, which can be T-type groove 431；Locking member 420 is equipped with boss 421, and the shape of the boss 421 can be with T
Type groove 431 matches, and by being connected in the T-type groove 431, realizes that the clamping of the second fitting 430 and locking member 420 is matched
It closes, the second fitting 430 is avoided to move up and down along the first cavity 110.In other embodiments, the second fitting 430 and lock
Tight part 420 can be cooperatively connected by other equivalent ways.Certainly, the second fitting 430 can also match with main 100 fixation of nail
It closes.
In this way, being convenient for the first fitting 410 and the second fitting by adding the second fitting 430 and locking member 420
430 are connected to angle adjusting piece 300 jointly, to enhance coupling mechanism force, further increase the locking effect to angle adjusting piece 300.
In one embodiment, it can offer respectively on locking member 420 and the second fitting 430 for the first fitting 410
The first through hole sequentially passed through and the second through-hole.The position of the first through hole can preferably be provided with the middle part of locking member 420, and
The center of circle of first through hole may be provided on the axis of the first cavity 110.First fitting 410 can pass through first through hole and abut
On angle adjusting piece 300, to realize the accurate locking to angle adjusting piece 300, to avoid angle adjusting piece 300 in position
Unnecessary rotation is done after determination.In this way, since the first fitting 410 sequentially passes through on locking member 420 and the second fitting 430
The through-hole opened up is connected on angle adjusting piece 300, can both fix the first fitting 410, it is avoided to shift, can also make
Obtain the more compact structure of entire intramedullary nail.
In one embodiment, with continued reference to shown in Fig. 5 a and 5b, the global shape of the second fitting 430 can be approximately round
Cylindricality, can be divided into for locking member 420 be clasped first and with angle adjusting piece 300 cooperate second.
Wherein, the groove cooperated with locking member 420 is offered on this first, the cross sectional shape of the groove can be T-type.?
In one embodiment, in order to reinforce the stability of the second fitting 430, its turn is avoided, it can in first outside wall surface
Equipped with anti-rotating part 433, at the same time, the inner wall of main nail 100 is equipped with and the anti-matched anti-spin slot 130 of rotating part 433.In this reality
It applies in mode, which can be the raised line in the outside wall surface for be symmetricly set on first, and the inner wall of main nail 100 is equipped with
The anti-spin slot of concave of the raised line is matched, the direction of the anti-spin slot 130 can be consistent with the axis direction of main nail.Second fitting at this time
First on raised line be fastened in the anti-spin slot, can avoid the second fitting rotated relative to main nail, improve the whole of intramedullary nail
Body stability.
Wherein, the end on jagged namely the second fitting 430 close to angle adjusting piece 300 is opened up on this second
Open up jagged 432.Further specifically, which can be at least 1/4 end face notch 432.In other embodiments
In, the shape of the notch 432 can match with angle adjusting piece.Notch 432 is used to avoid when angle adjusting piece 300 rotates
It opens, the rotation of angle adjusting piece 300 is interfered with reducing, enable 300 smooth rotation of angle adjusting piece.Second fitting
430 end for opening up notch 432 constitutes the bearing surface 434 of abutment angle regulating part 300.In the present embodiment, the abutting
Face is plane.In other embodiments, which can be the cambered surface of the shape of matching angle adjusting piece 300.In this way,
Compared with the first bar portion 411 of the first fitting 410 is connected on angle adjusting piece 300, the bearing surface 434 and angle adjusting piece
300 mating surface is bigger, in this way, further increasing locking effect, angle adjusting piece 300 is avoided to do unnecessary rotation.
In one embodiment, referring to fig. 2, shown in 6a and 6b, at least one hollow out can be offered on angle adjusting piece 300
Slot 310, the length direction of hollow slots 310 are not parallel to the direction for the abutting force that angle adjusting piece 300 is born.In this embodiment party
In formula, two hollow slots 310, and the direction of the hollow slots 310 and lag screw are opened up respectively at the both ends of angle adjusting piece 300
200 axis direction is parallel.In addition, the length of the length direction of hollow slots 310 can be not less than continuing surface on angle adjusting piece 300
In the length of the axis direction of lag screw 200.In this way, by adding hollow slots 310, convenient for being received in angle adjusting piece 300
After to the compressing of the first fitting 410,310 stress deformation of hollow slots, so that angle adjusting piece 300 deforms, the first fitting 410
By the deformation of abutment angle regulating part 300, abutting force is transmitted on lag screw 200, further increases lag screw 200
Coupling mechanism force avoids rotating.
Certainly, in other embodiments, angle adjusting piece 300 can be arranged to be fixedly connected with lag screw 200, example
It can such as be connected through a screw thread.In this way, after angle adjusting piece 300 is by abutting force, by the rotation of limited angular regulating part 300,
And then it is converted into the rotation of limitation lag screw 200.
In one embodiment, angle adjusting piece 300 has the continuing surface 330 accepting retaining mechanism 400 and abutting, Yi Jiyu
The loading end 340 that continuing surface 330 is oppositely arranged and is in contact with the first duct 120.The shape of the continuing surface 330 can be arc
Face, 340 shape of loading end can match with the shape of first matching part 140 in the first duct 120.In this way, can further improve
To the locking binding effect of angle adjusting piece 300.
In the present embodiment, with continued reference to shown in Fig. 2,6a and 6b, angle adjusting piece 300 can be middle part in waist-drum-shaped
Tube-in-tube structure.Angle adjusting piece 300 has middle part and both ends, and middle part is arc continuing surface, and both ends are smoothed from middle part
It crosses and gradually extends to respective both ends.By the way that angle adjusting piece 300 is arranged to what this middle part extended in waist-drum-shaped, to both ends
The tube-in-tube structure at both ends, so convenient for the horizontal span for improving angle adjusting piece 300, no need to increase the bump sizes at middle part
Under the premise of, it can be realized to the good support of angle adjusting piece 300.In one embodiment, the both ends of angle adjusting piece 300
Portion can be equipped with an at least side grain 350, and the first duct is equipped with the second matching part 150 matched with the side grain.In this reality
It applies in mode, the both ends of angle adjusting piece 300 can be oppositely arranged two respectively.In the present embodiment, the hollow slots 310 across
Middle part simultaneously extends on side grain 350.The strip that concretely both ends are wide, centre is narrow of hollow slots 310, and both ends may be provided at
On the side grain 350.Certainly, in other embodiments, which can meet the shape and setting of function for other.
In one embodiment, it with continued reference to shown in Fig. 2,6a and 6b, offers and is used on the end face of angle adjusting piece 300
Abut the gap slot 320 of lag screw 200.In the present embodiment, the number of the gap slot 320 can be two, as shown,
It can be oblique symmetrically arranged two gap slots 320.Preferably, gap slot 320 is U-shaped structure.Certainly, in other embodiments
In, gap slot 320 can be the other shapes of matching lag screw 200.In this way, by adding gap slot 320, in favor of pulling force spiral shell
Nail 200 is preferably connected on angle adjusting piece 300, and lag screw 200 is avoided to skid or shift.
The present invention also provides a kind of medical embedded fixed system, which includes any of the above-described intramedullary nail
And main nail distal end and the fastening screw (not shown) for fixing main nail 100 are set.
In addition, above-mentioned intramedullary nail may also include anti-rotation screw (not shown).The proximal end of main nail 100 is arranged in anti-rotation screw,
For preventing lag screw 200 from rotating.Correspondingly, angle adjusting piece can do corresponding adjusting according to anti-rotation screw is increased.In this way,
By setting fastening screw and/or anti-rotation screw, the fixed effect of intramedullary nail is further increased, improves wholistic therapy effect.
As an alternative, as shown in fig. 7, the lag screw 200 can have the first head 210 and the first tail portion
220.Wherein, the outside wall surface on the first head is equipped with the first screw thread 230 for implantation, and the first screw thread 230 has several reversed spiral shells
Tooth.On the direction from 210 to the first tail portion 220 of the first head, the outside wall surface on the top of reversed thread to the first head 210
Distance is sequentially reduced.Since under the action of reversed thread, its deeper fastening effect of reversed thread implantation is better, increases and hold
Power reduces the generation of " Z " effect.In addition, so guaranteeing good fastening effect by the setting gradually smaller reversed thread of size
While fruit, excessive injury is caused to patient bone after can avoid lag screw implantation.
Further, the longitudinal section on the first head 210 is trapezoidal, and the line on the top of each reversed thread and first
The central axes in portion are parallel.In this way, can be further reduced after lag screw implantation while avoiding occurring " Z " effect to trouble
The injury of person's bone.Certainly, in another embodiment, in the line on the top of each reversed thread and the first head 210
Axis can have inclination angle, and the line on the top of each reversed thread and the first tail portion may make up obtuse angle.
First tail portion 220 of lag screw is equipped with and matched several first groovings 240 of the screw thread of forcing screw.This
One grooving 240 can be longitudinal grooving, and grooving direction can be with the central axes direction near normal of lag screw.In this way, by setting
The first grooving 240 to match with the screw thread on forcing screw is set, lag screw 220 and forcing screw (not shown) can be reinforced
The fastness of connection is further reduced the generation of " Z " effect.
In order to improve the therapeutic effect of intramedullary nail, can be equipped at least between adjacent reversed thread on the first head 210
One implantation material injection hole (not shown).A settable implantation material injection hole, implantation material between the adjacent reversed thread in part
Injection hole is arranged in the outside wall surface on the first head 210 of lag screw, and at least the first head 210 of lag screw is hollow knot
Structure enters patient by the first the open-ended of head 210 convenient for implantation material after injecting in corresponding implantation material injection hole
In bone, to improve the bone strength of patient.Certainly, it can also be provided between adjacent reversed thread and multiple implantation materials be respectively set
Injection hole.Implantation material injection hole can arrange in a specific sequence, may be, for example, interval setting alternatively up and down or other sequences, when
So, implantation material injection hole can also random alignment.In one embodiment, the implantation material injection hole include but is not limited to be bone cement
Hole.It can also be other implantation material holes other than it can be bone cement hole, by being implanted into other implantable bones and bone can be enhanced
The implantation material of density and intensity reduces the problem bad due to osteoporosis bring therapeutic effect.
It should be noted that the particular content of intramedullary nail can be found in above description, details are not described herein.Fastening screw and anti-
Revolving screw can be structure snd size commonly used in the art, and in order to reduce length, details are not described herein.
Above-mentioned medical embedded fixed system passes through angular adjustment due to adding angle adjusting piece 300 and retaining mechanism 400
Part 300 is able to drive lag screw 200 and does close to or far from the main rotation for following closely proximal end, so can be according to itself stock of patient
Neck condition adjusts the position of lag screw 200, so that lag screw 200 or main nail 100 can either be squeezed between two parties, and can keep away
Exempt from the problem of lag screw 200 and femoral head are brought because of eccentric fixation occur.In addition, the adjustable intramedullary nail can pass through adjusting
Angle can meet biomechanical property, therapeutic effect is good, and treatment cycle is short to be suitble to a variety of different neck of femur angles；Nothing simultaneously
The intramedullary nail that a plurality of different neck angles need to be produced, can greatly reduce inventory and the management of curable product, general applicability is strong.
The preferred embodiment of the present invention has shown and described in above description, as previously described, it should be understood that the present invention is not office
Be limited to form disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations, modification and
Environment, and can be changed within that scope of the inventive concept describe herein by the above teachings or related fields of technology or knowledge
It is dynamic.And changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, then it all should be appended by the present invention
In scope of protection of the claims.
Claims (10)
1. a kind of adjustable intramedullary nail characterized by comprising
Main nail (100), main nail (100) proximal end, which has, offers the first duct (120) on the first cavity (110) and wall surface；
Lag screw (200) passes through first duct (120)；
Angle adjusting piece (300) is socketed on the lag screw (200) and can rotate in first duct (120),
The angle adjusting piece (300) is able to drive institute's lag screw (200) and does to be turned close to or far from described main nail (100) proximal end
It is dynamic；
Retaining mechanism (400) is at least partially disposed in first cavity (110), is fixedly connected with the main nail (100), and
It can be connected on the angle adjusting piece (300), to realize the locking to the angle adjusting piece (300).
2. adjustable intramedullary nail according to claim 1, which is characterized in that the retaining mechanism (400) includes:
First fitting (410), has the first bar portion (411) and first end (412), and the first end (412) can be with
The main nail (100) is threadedly coupled, and first bar portion (411) can be connected on the angle adjusting piece (300), to realize
Locking to the angle adjusting piece (300).
3. adjustable intramedullary nail according to claim 2, which is characterized in that the retaining mechanism (400) further include:
Locking member (420) can be fixedly connected with the main nail (100)；
Second fitting (430), between the locking member (420) and angle adjusting piece (300), one end and the locking member
(420) it connects, the other end is connected on the angle adjusting piece (300).
4. adjustable intramedullary nail according to claim 3, which is characterized in that close to institute on second fitting (430)
The end for stating angle adjusting piece (300) opens up jagged (432), and the notch (432) is for preventing interference angle adjusting piece
(300) it rotates.
5. adjustable intramedullary nail according to claim 3, which is characterized in that the locking member (420) and described second is supported
The first through hole sequentially passed through for first fitting (410) and the second through-hole are offered on fitting (430) respectively；
Boss and groove are optionally provided on second fitting (430) and locking member (420), the two passes through the boss
It is engaged by clamping with groove.
6. -5 any adjustable intramedullary nail according to claim 1, which is characterized in that on the angle adjusting piece (300)
At least one hollow slots (310) is offered, the length direction of the hollow slots (310) is not parallel to the angle adjusting piece
(300) direction for the abutting force born.
7. -5 any adjustable intramedullary nail according to claim 1, which is characterized in that angle adjusting piece (300) tool
Have accept continuing surface (330) that the retaining mechanism (400) abuts and be oppositely arranged with the continuing surface (330) and with institute
The loading end (340) that the first duct (120) is in contact is stated, the shape of the continuing surface (330) is arcwall face, the loading end
(340) shape and the shape of the first matching part (140) of first duct (120) match.
8. adjustable intramedullary nail according to claim 7, which is characterized in that the angle adjusting piece (300) is in for middle part
The tube-in-tube structure of waist-drum-shaped, and the gap slot (320) for abutting the lag screw (200) is offered on end face.
9. -5 any adjustable intramedullary nail according to claim 1, which is characterized in that in the angle adjusting piece (300)
Under the action of, the axis of described main nail (100) proximal end and the axis of the lag screw (200) distal end have angle theta, the folder
The adjustable extent of angle θ is 90 °~140 °.
10. a kind of medical embedded fixed system, which is characterized in that including any intramedullary nail of claim 1-9, Yi Jishe
It sets in main nail (100) distal end and for fixing the main fastening screw for following closely (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258654.9A CN109394325A (en) | 2018-10-26 | 2018-10-26 | A kind of adjustable intramedullary nail and medical embedded fixed system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811258654.9A CN109394325A (en) | 2018-10-26 | 2018-10-26 | A kind of adjustable intramedullary nail and medical embedded fixed system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109394325A true CN109394325A (en) | 2019-03-01 |
Family
ID=65469136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811258654.9A Pending CN109394325A (en) | 2018-10-26 | 2018-10-26 | A kind of adjustable intramedullary nail and medical embedded fixed system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109394325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780754A (en) * | 2021-01-20 | 2021-05-11 | 清华大学 | Rod-shaped device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8701164U1 (en) * | 1987-01-24 | 1987-06-04 | Howmedica Gmbh, 2314 Schoenkirchen, De | |
| JPH0966059A (en) * | 1995-08-31 | 1997-03-11 | Mizuho Ika Kogyo Kk | Intramedullary nail |
| US20070233103A1 (en) * | 2006-03-31 | 2007-10-04 | Metzinger Anthony J | Intramedullary nail, intramedullary nail assembly and method |
| US20070233104A1 (en) * | 2006-03-31 | 2007-10-04 | Metzinger Anthony J | Intramedullary nail implant assembly, kit and method |
| CN101754723A (en) * | 2007-06-22 | 2010-06-23 | 圣歌整形外科梵有限责任公司 | Intramedullary rod with pivotable fastener and method for using same |
| CN102986636A (en) * | 2012-12-25 | 2013-03-27 | 西北农林科技大学 | Air-assisted spraying test bed |
| US20140330274A1 (en) * | 2013-03-15 | 2014-11-06 | Epix Orthopaedics, Inc | Implantable device with pivotable fastener and self-adjusting set screw |
| CN204804597U (en) * | 2015-07-16 | 2015-11-25 | 北京格雷泰科建筑技术有限公司 | Automatic door slides |
| CN209499872U (en) * | 2018-10-26 | 2019-10-18 | 大博医疗科技股份有限公司 | A kind of adjustable intramedullary nail and medical embedded fixed system |
-
2018
- 2018-10-26 CN CN201811258654.9A patent/CN109394325A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE8701164U1 (en) * | 1987-01-24 | 1987-06-04 | Howmedica Gmbh, 2314 Schoenkirchen, De | |
| JPH0966059A (en) * | 1995-08-31 | 1997-03-11 | Mizuho Ika Kogyo Kk | Intramedullary nail |
| US20070233103A1 (en) * | 2006-03-31 | 2007-10-04 | Metzinger Anthony J | Intramedullary nail, intramedullary nail assembly and method |
| US20070233104A1 (en) * | 2006-03-31 | 2007-10-04 | Metzinger Anthony J | Intramedullary nail implant assembly, kit and method |
| CN101754723A (en) * | 2007-06-22 | 2010-06-23 | 圣歌整形外科梵有限责任公司 | Intramedullary rod with pivotable fastener and method for using same |
| CN102986636A (en) * | 2012-12-25 | 2013-03-27 | 西北农林科技大学 | Air-assisted spraying test bed |
| US20140330274A1 (en) * | 2013-03-15 | 2014-11-06 | Epix Orthopaedics, Inc | Implantable device with pivotable fastener and self-adjusting set screw |
| CN204804597U (en) * | 2015-07-16 | 2015-11-25 | 北京格雷泰科建筑技术有限公司 | Automatic door slides |
| CN209499872U (en) * | 2018-10-26 | 2019-10-18 | 大博医疗科技股份有限公司 | A kind of adjustable intramedullary nail and medical embedded fixed system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780754A (en) * | 2021-01-20 | 2021-05-11 | 清华大学 | Rod-shaped device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10271881B2 (en) | Bone fixation system | |
| US6562042B2 (en) | Orthopedic implant used to repair intertrochanteric fractures and a method for inserting the same | |
| US5300074A (en) | Two-part angle plate | |
| JP4398429B2 (en) | Bone plate | |
| US6719759B2 (en) | Bone plate | |
| US20050101959A1 (en) | Internal fixator of bones | |
| CN104487010B (en) | Elongated pin for an external modular fixation system for temporary and/or permanent fixation applications and external modular fixation system | |
| US20060100623A1 (en) | System for fixation of bone fractures | |
| JP2001238892A (en) | Device to insert into bone marrow for internal fixation for fracture of bone | |
| US11141203B2 (en) | Device for fixation of bone fragments | |
| CN201505174U (en) | Thighbone proximal hollow locking plate | |
| US8758345B2 (en) | Interlocking nail geometry and method of use | |
| CN209499872U (en) | A kind of adjustable intramedullary nail and medical embedded fixed system | |
| CN109394325A (en) | A kind of adjustable intramedullary nail and medical embedded fixed system | |
| EP3170465B1 (en) | Device for fixing proximal humerus | |
| CN208838131U (en) | Femur internal fixation system | |
| CN113925586B (en) | Proximal femur intramedullary nail system | |
| CN208404803U (en) | A kind of interlocking anti-settling proximal femoral nail | |
| CN101116635A (en) | Anti-rotating self-locking bone fracture internal fixing device | |
| CN107440778A (en) | One kind interlocking anti-settling PFN | |
| US11006986B2 (en) | Internal fixation device for the pediatric correction of severe bone malformations | |
| CN214632302U (en) | Improved tension trabecular bone reconstruction type proximal femoral intramedullary nail | |
| CN216985117U (en) | Bone fracture plate | |
| CN209059408U (en) | A kind of Medullary fixation device guide pin | |
| CN204364106U (en) | Femur and tibia humerus locking intramedullary needle |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20240603 Address after: Room 203, building 4, 590 Ruiqing Road, Pudong New Area, Shanghai, 200120 Applicant after: Shanghai Dabo Medical Technology Co.,Ltd. Country or region after: China Address before: No. 18 Shanbian Hongdong Road, Haicang District, Xiamen City, Fujian Province, 361000 Applicant before: DOUBLE MEDICAL TECHNOLOGY Inc. Country or region before: China |