CN109965964A - Expansible orthopaedics implant - Google Patents
Expansible orthopaedics implant Download PDFInfo
- Publication number
- CN109965964A CN109965964A CN201711468772.8A CN201711468772A CN109965964A CN 109965964 A CN109965964 A CN 109965964A CN 201711468772 A CN201711468772 A CN 201711468772A CN 109965964 A CN109965964 A CN 109965964A
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- China
- Prior art keywords
- expansible
- casing
- orthopaedics implant
- opening
- connecting rod
- Prior art date
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Classifications
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- 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
-
- 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
- A61B17/683—Internal fixation devices, including fasteners and spinal fixators, even if a part thereof projects from the skin comprising bone transfixation elements, e.g. bolt with a distal cooperating element such as a nut
-
- 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
- A61B17/686—Plugs, i.e. elements forming interface between bone hole and implant or fastener, e.g. screw
-
- 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
-
- 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
- A61B2017/8655—Pins or screws or threaded wires; nuts therefor with special features for locking in the bone
Abstract
The present invention discloses a kind of expansible orthopaedics implant comprising: a casing, a shaft, first expansion part and a first connecting rod.This casing has one first opening, second opening and across an axle center of the first opening and the second opening.Shaft one end is arranged among casing, the outside that there is the other end top to protrude from the first opening.First expansion part has a first end for being articulated in casing and a second end.One first distal end (distal end) that first connecting rod has first proximal end (proximal end) for being articulated in top and is articulated in second end.When top is open along an extending direction in axle center far from first, it will push first connecting rod and drive second end, along the first direction of vertical central far from axle center.
Description
Technical field
The present invention relates to a kind of implantable medical equipments.In particular to a kind of orthopaedics implant.
Background technique
It finds, is fixed during fractures using orthopaedics implant, but often because patient's from clinical observation
Bone density is insufficient, and bone is caused to cut effect (Superior cut-out) and fail.It is normal to be applied to treatment intertrochanteric fracture
Dynamic hip screw (Dynamic hip screw, DHS), character used in proper names and in rendering some foreign names Ma bone nail (Gamma nail) and the slidingtype screw bone plate seen
(sliding screw plate) ... for waiting internal fixation devices, if but patient bone density it is insufficient, be implanted into after hip screw,
It is easy to fall in femur bulb varus, and then screw is made to be pierced by femur bulb upwards, and cause implantation material that failure can occur, destroy
The problems such as with loosening.
Therefore, in need that a kind of advanced expansible orthopaedics implant is provided, to solve prior art problem encountered.
Summary of the invention
The present invention discloses a kind of expansible orthopaedics implant, comprising: a casing, a shaft, first expansion part
An and first connecting rod.This casing has one first opening and an axle center.Shaft is arranged among casing, and has one
A top is convexly equipped in the outside of the first opening.First expansion part has a first end for being articulated in casing and a second end.
First connecting rod has first proximal end (proximal end) for being articulated in top and is articulated in one first of second end
Distally (distal end).When top along the extending direction in axle center far from the first opening when, will push first connecting rod and drive the
Two ends, along the first direction of vertical central far from axle center.
According to above content, the present invention provides a kind of expansible orthopaedics implant, including be sheathed in a casing one
Branch shaft and an expansion part and a connecting rod.Wherein, one end of expansion part and connecting rod is frames rotatably mounted relative to one another, and the other end of the two
Then it is articulated on casing and connecting rod respectively.By pushing connecting rod that can drive the second end of expansion part, along the direction of vertical central
Far from axle center, a braking structure expanded outwardly by sleeve edge is formed, orthopaedics implant can be increased and connect with periphery cancellous bone
The area and stability of touching, prevent orthopaedics implant from further rotating in inside bone, it is prominent wear or loosen, bone can be greatly reduced and cut
The risk of effect.
Detailed description of the invention
More preferably understand in order to which the above-mentioned and other aspect to this specification has, special embodiment below, and appended by cooperation
Attached drawing detailed description are as follows:
Figure 1A is the structure sectional view before expansible orthopaedics implant expansion depicted in one embodiment of the invention；
Figure 1B is the partial structurtes cutaway view Amplified image that Figure 1A is painted before expansible orthopaedics implant expansion；
Fig. 1 C is the structural perspective after the expansible orthopaedics implant expansion that Figure 1A is painted；
Fig. 2A is the structure sectional view before expansible orthopaedics implant expansion depicted in another embodiment of the present invention；
Fig. 2 B is the structural perspective after the expansible orthopaedics implant expansion that Fig. 2A is painted；
Fig. 3 A is the structure sectional view before expansible orthopaedics implant expansion depicted in another embodiment of the present invention；
Fig. 3 B is the structural perspective after the expansible orthopaedics implant expansion that Fig. 3 A is painted；
Fig. 4 A is the structure sectional view before expansible orthopaedics implant expansion depicted in one more embodiment of the present invention；
Fig. 4 B is the partial structurtes cutaway view Amplified image that Fig. 4 A is painted before expansible orthopaedics implant expansion；
Fig. 4 C is the structural perspective after the expansible orthopaedics implant expansion that Fig. 4 A is painted；
Fig. 5 is the structural perspective after expansible orthopaedics implant expansion depicted in one embodiment of the invention；
Fig. 6 A is the structural perspective before expansible orthopaedics implant expansion depicted in one embodiment of the invention；
Fig. 6 B is the structural perspective after the expansible orthopaedics implant expansion that Fig. 6 A is painted；
Fig. 7 A to Fig. 7 E is respectively the structure top view that different embodiments of the invention are painted different expansible orthopaedics implants；
Fig. 8 is a kind of part-structure perspective view of expansible orthopaedics implant depicted in one embodiment of the invention；With
And
Fig. 9 is that will be implanted into patient's hipbone comprising the hip screw of expansible orthopaedics implant depicted in Fig. 6 A to Fig. 6 B
Structural schematic diagram afterwards.
Symbol description
100,200,300,400,500,600,700,700A, 700B, 700C, 700D, 800: expansion orthopaedics implant
101: casing 101a: the first is open
101b: the second opening 101c: axle center
101d: the tube wall of casing
101e, 102d, 401g: helical form protrusion
101f: the first link position 101g, 402d: spiral groove
101M: the first part 101N: the second part of casing of casing
102: shaft 102a: the top of shaft
102b: the 102c: the second link position of tail end of shaft
102e: long through-hole 102M: the Part III of shaft
102N: the Part IV of shaft
103, the 203,303,803a: the first expansion part
103a, 203a: first end
103b, 203b, 303b, 403b: second end
103c, 203c: first arm of force
104,204,304: first connecting rod
104a, 304a: the first proximal end
104b, 204b, 304b: the first distal end
104c, 304c: second arm of force
105: the first pivot, 106: the second pivot
108: anti-rotation designs 108a: protrusion trip
108b: stop platform 109: taper plug member
203P: the 203Q: the first bending section of body part
304P: the 304Q: the second bending section of rod body part
403, the 803b: the second expansion part 403a: third end
403b: the four end 404: second connecting rod
404b: the second distal end 603,803c: third expansion part
604: the 603a: the five end of third connecting rod
603b: the six end 614: through hole
R1, r2: the diameter that internal diameter R: the first of tube wall is open is covered
H1, H2: distance D: the extending direction in axle center
P: pre-determined distance L1: first direction
L2: second direction L3: third direction
K: the distance of the S: the first distal end of outer diameter of casing to casing axis
θ 1, θ 2, θ 5, θ 61, θ 62, θ 63: angle
Specific embodiment
The present invention provides a kind of expansible orthopaedics implant, can increase the area that orthopaedics implant is contacted with periphery cancellous bone
And stability, the risk that bone cuts effect is greatly reduced.In order to the above embodiment of the present invention and other objects, features and advantages
It can be clearer and more comprehensible, multiple embodiments be cited below particularly, and appended attached drawing is cooperated to elaborate.
But it must be noted that these specific case study on implementation and method, be not intended to limit the invention.The present invention still may be used
It is implemented using other features, element, method and parameter.The it is proposed of preferred embodiment, only to illustrate skill of the invention
Art feature, the claim being not intended to limit the invention.Have usually intellectual in the technical field, it can be according to following theory
The description of bright book is not departing from scope of the invention, makees impartial modification and variation.Different embodiments and attached drawing it
In, the same or similar element will be indicated with identical component symbol.
Figure 1A and Fig. 1 C is please referred to, Figure 1A is the expansible orthopaedics implant according to depicted in one embodiment of the invention
Structure sectional view before 100 expansions.Figure 1B is to be painted the partial structurtes before expansible orthopaedics implant 100 is expanded according to Figure 1A to cut open
Depending on enlarged drawing (for the sake of clear description, Figure 1B is not painted expansion part 103 and first connecting rod 104).Fig. 1 C is according to Figure 1A
Structural perspective after the expansion of expansible orthopaedics implant 100 being painted.Expansible orthopaedics implant 100 includes at least a set
The first expansion part 103 of the shaft 102, one of pipe 101, one and a first connecting rod 104.
Casing 101 can be a kind of tubular shell, and both ends are respectively provided with interconnected one first opening 101a and second
Open 101b and and one through this tubular shell first open 101a and second opening 101b axle center 101c.Of the invention one
In a little embodiments, 101 tube wall 101d of casing is located at the section on X-Y plane, can have a kind of polygon pattern, such as triangle
Shape, square, hexagon ... etc., round, ellipse, regular arc, irregular shape.In the present embodiment, casing 101 is located at X-
Section on Y plane can be circle.First, which opens 101a and second, opens the inner side edge that 101b then passes through 101 tube wall 101d of casing
Edge defines the circular open come.Axle center 101c is through the center of circle of the first opening 101a and the second opening 101b.
The internal diameter of 101 tube wall 101d of casing can have at least two sizes.For example, in the present embodiment, casing 101 wraps
Include first part 101M and second part 101N.First part 101M is started by the first opening 101a, extends a distance into H1, and one
Until the first link position 101f；The internal diameter r1 of the tube wall 101d of casing 101, the diameter R of the substantially equal to first opening 101a.
Second part 101N is started by the first link position 101f to the second opening 101b；The internal diameter r2 of 101 tube wall 101d of casing, essence
The upper diameter R for being greater than the first opening 101a.
In addition, can also include in some embodiments of the invention, on the outside of the tube wall 101d of casing 101 around axle center
The helical form protrusion 101e of 101c, to promote casing 101 and be implanted the periphery sclerotin at position or the frictional force of tissue.Set
101 tube wall 101d of pipe is started by the first opening 101a to the inside of the first link position 101f, can also include a helical form
Groove 101g, the recessed inside in 101 tube wall 101d of casing.
Shaft 102 is arranged among casing 101, and has the 102a and tail end 102b in a top.Of the invention
In some embodiments, shaft 102 is a solid stripe stock, and tail end 102b passes through the first opening 101a of casing 101, is arranged
Among casing 101.Top 102a is then exposed to the outside of the first opening 101a.In the present embodiment, shaft 102 is a cylinder
Shape stock, top 102a are a solid cylindrical propeller boss (hub), and the diameter of cylindrical propeller boss (top 102a) is substantially greater than
The diameter of cylindrical posts (shaft 102).It is worth noting that, in order to which the connection of clear description shaft 102 and other assemblies is closed
System, is not painted the complete structure of propeller boss in Figure 1A to Fig. 1 C.Any pivot joint knot that can be used for shaft 102 Yu other assemblies
Structure, all without departing from the scope of propeller boss described herein.
The size of shaft 102 can cooperate the internal diameter r1 and r2 of 101 tube wall 101d of casing and be varied.Such as in this reality
It applies in example, shaft 102 includes an a Part III 102M and Part IV 102N.Part III 102M is by the 102a of top
It calculates, extends a distance into H2, until the second link position 102c；Its diameter r3, which is essentially less than, is equal to 101 tube wall 101d of casing
Internal diameter r1.Part IV 102N extends to tail end 102b by the second link position 102c, and diameter r4, which is essentially less than, is equal to set
The internal diameter r2 of 101 tube wall 101d of pipe, and it is substantially greater than the internal diameter r1 equal to 101 tube wall 101d of casing.Distance H2 is substantially greater than
Distance H1.
In some embodiments of the invention, the surface of the Part III 102M of shaft 102 can also include a spiral
Spiral groove 101g on the inside of shape protrusion 102d, with the tube wall 101d of 101 first part 101M of casing is mutually screwed togather.Work as axis
The helical form protrusion 102d of bar 102 is forward rotated relative to the spiral groove 101g of casing 101, can drive shaft 102
Top 102a along axle center 101c extending direction D far from first opening 101a.As the helical form protrusion 102d of shaft 102
Spiral groove 101g relative to casing 101 is rotated backward, and the top 102a of shaft 102 can be driven along axle center 101c's
Extending direction D is close to the first opening 101a.
It in some embodiments of the invention, can further include primary antibody Rotation Design 108, positioned at the 4th of shaft 102
Divide between 102N and the second part 101N of casing 101.Wherein, anti-rotation design 108 can be a kind of 101 tube wall of cooperation casing
The internal diameter of 101d changes, and is formed by trip design.For example, in the present embodiment, the top of actuarial shaft 102 can be passed through
The preset maximum extension distance P of 102a, and then it is arranged one on the second link position 102c of the Part IV 102N of shaft 102
Protrude trip 108a；And the first link position 101f of the second part 101N by the way that casing 101 is arranged in, a stopping is set
Platform 108b.In other words, 102a preset maximum extension distance P in top is substantially equal to difference (the i.e. P between distance H2 and distance H1
=H2-H1).
When shaft 102 top 102a far from first opening 101a distance substantially beyond a pre-determined distance P (i.e. shaft
The distance between 102 top 102a and protrusion trip 108a) when, the stopping positioned at 101 first link position 101f of casing is flat
Platform 108b, and be mutually clamped positioned at the protrusion trip 108a of 102 second link position 102c of shaft, to prevent shaft 102 because suitable
To rotation, make top 102a further away from the first opening 101a.Wherein, the second part 101N of casing 101 and shaft 102
Negative common difference range (draft angular region (draft angle)) between Part IV 102N, essence is between 0.1 degree to 2 degree.
It in some embodiments of the invention, can also include a bottom anti-rotation design, positioned at the tail end of shaft 102
102b.For example, in the present embodiment, anti-rotation design in bottom can be a kind of taper plug member 109.By 109 embolism of taper plug member
Among the second part 101N of casing 101, and it is resisted against the tail end 102b of shaft 102.By the design of negative common difference, make taper
Urgent fixation is generated between the side wall of plug member 109 and the second part 101N of casing 101.Can further prevent shaft 102 because
It rotates backward and shrinks back backward.
In some embodiments of the invention, shaft 102 can also be a kind of hollow tubular structure.For example, in this reality
It applies in example, shaft 102 has a long through-hole 102e across top 102a to tail end 102b.When expansible orthopaedics implant
100 are implanted affected part, such as femur bulb, can be by the injectable filler with biocompatibility, such as bone cement when middle
(cement) or other suitable substances are filled into femur bulb via long through-hole 102e, to promote inostosis.
First expansion part 103 has an a first end 103a and second end 103b.First end 103a passes through the first pivot
Axis 105 is articulated on casing 101；Second end 103b is articulated on first connecting rod 104.In some embodiments of the invention,
One expansion part 103 can be any combination of a kind of plate structure, rod-like structure, vertebra shape structure or above structure.For example, at this
In embodiment, the first expansion part 103 can be a kind of rod-like structure.And the ontology of rod-like structure has vertical first pivot 105
The first arm of force 103c.Angle theta 1 between first arm of force 103c and the axle center 101c of casing 101, can be with the first expansion part
103 degree rotated around the first pivot 105, and be varied.In the present embodiment, angle theta 1 size essence between 0 ° extremely
Between 70 °.
First connecting rod 104 has an a first proximal end 104a and first distal end 104b.First proximal end 104a passes through
One second pivot 106 is articulated in the top 102a of shaft 102；First connecting rod 104 has one second power of vertical second pivot 106
Arm 104c；And first the second end 103b and the first distal end 104b of first connecting rod 104 of expansion part 103 be then articulated in first arm of force
On the crosspoint 107 of 103c and the second arm of force 104c.Angle theta between shaft 102 and the second arm of force 104c of first connecting rod 104
2, the degree that can be rotated with first connecting rod 104 around the second pivot 106, and be varied.In the present embodiment, angle theta 2
Size essence is between 175 ° to 90 °.
When forward rotating shaft rod 102, make the top 102a of shaft 102 along the extending direction D of axle center 101c far from first
When opening 101a, the second end 103b that first connecting rod 104 drives the first expansion part 103 will push, along vertical central 101c's
Axle center 101c of the first direction L1 far from casing 101.At this point, the second end 103b and first connecting rod 104 of first expansion part 103
First distal end 104b, can be centered on the axle center 101c of casing 101, radial outward dilations.Relatively, when rotating backward shaft
102, when making the top 102a of shaft 102 along the extending direction D of axle center 101c close to the first opening 101a, it will pull the first company
Bar 104 drives the second end 103b of the first expansion part 103, along the first direction L1 of vertical central 101c reversely close to casing
101 axle center 101c.It, can be at this point, the second end 103b of the first expansion part 103 and the first distal end 104b of first connecting rod 104
Centered on the axle center 101c of casing 101, radially-inwardly collapse.
In some embodiments of the invention, when the first expansion part 103 and first connecting rod 10 collapse completely, the first expansion
Part 103 and first connecting rod 104 can be fully located within the scope of the outer diameter K of casing 101.When the first expansion part 103 and first connecting rod
104 when expanding outward to maximum, and the second end 103b of the first expansion part 103 (is articulated in the first distal end of first connecting rod 104
104b) except can be beyond the outer diameter K range of casing 101.In some embodiments of the invention, the second of the first expansion part 103
End 103b (, it is articulated in the first distal end 104b of first connecting rod 104) and to the distance S of 101 axle center 101c of casing, with casing 101
Outer diameter K ratio (S/K), substantially between 0.1 to 3.5.
Such as in the present embodiment, when the first expansion part 103 and first connecting rod 102 collapse completely, the first expansion part 103
Second end 103b to 101 axle center 101c of casing distance S, can be 0.6 times of 101 outer diameter K of casing.When the first expansion part
103 and first connecting rod 104 when expanding outward to maximum, the second end 103b of the first expansion part 103 is to 101 axle center 101c's of casing
Distance S can be 3 times of 101 outer diameter K of casing.In other embodiments, the degrees of expansion of the first expansion part 103, can be according to
The angle that is pivotally connected between one expansion part 103 and the length and the two and casing 101 and shaft 102 of first connecting rod 104 is subject to
Adjustment.
However, in some embodiments of the invention, the mode of connection of first connecting rod 104 and the first expansion part 103, not
As limit.A and Fig. 2 B referring to figure 2..Fig. 2A is the expansible orthopaedics implantation according to depicted in another embodiment of the present invention
Structure sectional view before the expansion of object 200.Fig. 2 B is that the structure after the expansible orthopaedics implant 200 being painted according to Fig. 2A is expanded is saturating
View.Wherein, the structure of expansible orthopaedics implant 200 substantially with expansible orthopaedics implant depicted in Figure 1A to Fig. 1 C
100 is similar, and difference is only that 203 shape of the first expansion part of expansible orthopaedics implant 200 is different.
In the present embodiment, the first expansion part 203 includes a portion body part 203P interconnected and one first
Bending section 203Q.Body part 203P has first arm of force 203c vertical with the first pivot 105；First end 203a is located at body part
On 203P, and it is pivotally connected by the first pivot 105 with casing 101；And second end 203b is located on the second bending section 203Q, and separate
First arm of force 203c.Compared with expansible orthopaedics implant 100, when the first expansion part 203 and first connecting rod 204 are collapsing completely
When, the second end 203b of the first expansion part 203 and the first distal end 204b of first connecting rod 204 can be closer to 101 axle center of casing
101c.Therefore, radial area when expansible orthopaedics implant 200 collapses can be saved, in order to implantation of performing the operation.
It is worth noting that, the external form of the first bending section 203Q of the first expansion part 203 is not limited to arc.Any one
The bending structure that kind can make the second end 203b of the first expansion part 203 deviate the first arm of force 203c, all without departing from of the invention
Scope.
A and Fig. 3 B referring to figure 3..Fig. 3 A is the expansible orthopaedics implant according to depicted in another embodiment of the present invention
Structure sectional view before 300 expansions.Fig. 3 B is that the structure after the expansible orthopaedics implant 300 being painted according to Fig. 3 A is expanded is had an X-rayed
Figure.Wherein, the structure of expansible orthopaedics implant 300 substantially with expansible orthopaedics implant 100 depicted in Figure 1A to Fig. 1 C
Similar, difference is only that 304 shape of first connecting rod of expansible orthopaedics implant 300 is different.
In the present embodiment, first connecting rod 304 includes a rod body part 304P interconnected and one second bending
Portion 304Q.Rod body part 304P has the second arm of force 304c of vertical second pivot 106；First proximal end 304a is located at rod body part 304P
On, pass through the top 102a of the second pivot 106 and shaft 102；First distal end 304b is located on the second bending section 304Q, far from the
Two arm of force 304c, and be pivotally connected with the second end 303b of the first expansion part 303.Compared with expansible orthopaedics implant 100, when first
Expansion part 303 and first connecting rod 304 are when fully expanded, and the of the second end 303b of the first expansion part 303 and first connecting rod 304
One distal end 304b, can be further from 101 axle center 101c of casing.Therefore, when the top 102a of shaft 102 moves up same distance
When, it is possible to increase the radial dilatation area of the first expansion part 303 and first connecting rod 304.
It is worth noting that, the external form of the second bending section 304Q of first connecting rod 304 is not limited to arc.It is any
The first distal end 304b of first connecting rod 304 can be made to deviate the bending structure of the second arm of force 304c all without departing from spirit of the invention
Range.
A to Fig. 4 C referring to figure 4..Fig. 4 A is the expansible orthopaedics implant according to depicted in one more embodiment of the present invention
Structure sectional view before 400 expansions.Fig. 4 B is to be painted the partial structurtes before expansible orthopaedics implant 400 is expanded according to Fig. 4 A to cut open
Depending on enlarged drawing (for the sake of clear description, Fig. 4 B is not painted the second expansion part 403 and second connecting rod 404).According to Fig. 4 C
Structural perspective after the expansion of expansible orthopaedics implant 400 that Fig. 4 A is painted.
Wherein, the structure of expansible orthopaedics implant 400 is substantially implanted into expansible orthopaedics depicted in Figure 1A to Fig. 1 C
Object 100 is similar.The difference is that expansible orthopaedics implant 400 further includes second expansion part 403 and a second connecting rod
404.Wherein, the second expansion part 403 has a third end 403a and a 4th end 403b；Third end 403a is articulated in casing
101；Second connecting rod 404 has a second proximal end 404a for being articulated in 102 top 102a of shaft and is articulated in the 4th end
A second distal end 404b of 403a.
In addition, the surface of the Part III 102M of the shaft 102 of expansible orthopaedics implant 400, it may include a spiral
Helical form protrusion 401g on the inside of shape groove 402d, with the tube wall 101d of 101 first part 101M of casing is mutually screwed togather.When suitable
When making top 102a along the extending direction D of axle center 101c far from the first opening 101a to rotating shaft rod 102, the second company will push
Bar 404 drives the 4th end 403b of the second expansion part 403, along the second direction L2 of vertical central 101c far from casing 101
Axle center 101c.
In the present embodiment, both first direction L1 and second direction L2 can be parallel to each other, but contrary.Change speech
It, both first direction L1 and second direction L2 press from both sides one substantially 180 ° of the straight angle.But in some embodiments of the present invention
The dimension of two expansion parts 403 and second connecting rod 404, can be according to implant site bone density and the need to be met with stresses
It asks, and first direction L1 and second direction L2 is made to press from both sides (the expansible orthopaedics shown as shown graphically in fig 5 of non-straight angle θ 5 less than 180 °
Implantation material 500).
Although in the embodiment of Fig. 4 A~Fig. 4 C and Fig. 5, the size of the first expansion part 103 (such as length and/or width
Degree) and the second expansion part 403 it is identical；The size and second connecting rod 404 of first connecting rod 104 are identical.But in other embodiments, may be used
To change the first expansion part 103, the second expansion part 403, first according to implant site bone density and the demand to be met with stresses
The size of connecting rod 104 and second connecting rod 404 keeps the size of the first expansion part 103 and the second expansion part 403 different, or makes first
The size and second connecting rod 404 of connecting rod 104 are different.
Please referring to Fig. 6 A and Fig. 6 B, Fig. 6 A is the expansible orthopaedics implant according to depicted in one embodiment of the invention
Structural perspective after 600 expansions.Fig. 6 B is that the structure after the expansible orthopaedics implant 600 being painted according to Fig. 6 A is expanded is had an X-rayed
Figure.The structure of expansible orthopaedics implant 600 is substantially similar to expansible orthopaedics implant 400 depicted in Fig. 4 C.Difference exists
In expansible orthopaedics implant 600 further includes a third expansion part 603 and a third connecting rod 604.
Wherein, third expansion part 603 has a 5th end 603a and a 6th end 603b.5th end 603a is articulated in
Casing 101；Third connecting rod 604a has the third proximal end 604a for the top 102a for being articulated in shaft 102 and is articulated in the
A third distal end 604b of six end 603b.When forward rotating shaft rod 102 makes top 102a along the extending direction D of axle center 101c
When far from the first opening 101a, the 6th end 603b that second connecting rod 604 drives the second expansion part 603 will push, along vertical axis
Axle center 101c of the third direction L3 of heart 101c far from casing 101.
In the present embodiment, first direction L1 and second direction L2 is formed by angle theta 61, second direction L2 and third party
Angle theta 62 and first direction L1 are formed by L3 and third direction L3 is formed by angle theta 63 and constitutes a circumference just
Angle (360 °).Wherein angle theta 61, θ 62 (being respectively 120 °) equal with 63 three of θ.But as previously mentioned, third expansion part 603
With the dimension of third connecting rod 604, angle theta can be made according to implant site bone density and the demand to be met with stresses
61, the size of θ 62 and θ 63 have different arrangements.For example, in other embodiments of the invention, angle theta 61, θ 62 and θ 63 3
Person can be unequal each other or only wherein the two is equal.
In addition, among the present embodiment, first expands in order to increase the stress bearing capacity of expansible orthopaedics implant 600
Opening part 103, the second expansion part 403 and third expansion part 603 can be a kind of plate structure of arc, can be real when collapsing
The tube wall 101d of the parallel casing 101 of matter.And first expansion part 103, the second expansion part 403 and third expansion part 603 are also distinguished
Including a helical form protrusion 613, it is convexly equipped in the first expansion part 103, the second expansion part 403 and third expansion part respectively
On surface of 603 expansion parts far from 101 axle center 101c of casing, and with the helical form protrusion on the outside of 101 tube wall 101d of casing
101e shares axle center 101c.
Among some embodiments of the present invention, expansible orthopaedics implant 600 can use bioerodible material, example
As used with magnesium, iron, manganese or above-mentioned alloy, it is the bioerodible composition of substrate, is made.In order to promote expansible bone
Decomposition rate of the surgical implant 600 in organism.It can be in casing 101, shaft 102, the expansion of the first expansion part 103, second
In 603 at least one of them of part 403 and third expansion part, at least one through hole 614 is formed.It, can among the present embodiment
To form multiple through holes 614 in casing 101, to promote the biological decomposition rate of this block.
It is worth noting that, the expansion part of expansible orthopaedics implant 600 and the number of connecting rod are not limited thereto.Holding
It receives within the scope of the license of space, may include more expansion parts and connecting rod.For example, please referring to Fig. 7 A to Fig. 7 E, Fig. 7 A is extremely
Fig. 7 E be respectively according to different embodiments of the invention, be painted different expansible orthopaedics implants 700,700A, 700B, 700C and
The structure top view of 700D.Wherein, the structure of expansible orthopaedics implant 700,700A, 700B, 700C and 700D, can distinguish
With four groups, five groups, six groups, the seven groups and eight groups clamping structures as composed by expansion part 703 and connecting rod 704.
In addition, the expansion part and connecting rod of expansible orthopaedics implant 600, can also have other possible shapes.For example, asking
Referring to Fig. 8, Fig. 8 is that a kind of part-structure of expansible orthopaedics implant 800 according to depicted in one embodiment of the invention is saturating
View.Wherein, the structure of expansible orthopaedics implant 800 substantially with expansible orthopaedics implant depicted in Fig. 6 A and Fig. 6 B
600 is similar.The difference is that the first expansion part 803a of expansible orthopaedics implant 800, the second expansion part 803b and third expand
Opening part 803c is all slab construction.
Fig. 9 is please referred to, Fig. 9 is to be painted the hipbone comprising expansible orthopaedics implant 600 depicted in Fig. 6 A to Fig. 6 B
Screw, the structural schematic diagram after being implanted into patient's hipbone.It will include the hip screw implantation patient of expansible orthopaedics implant 600
, can be by adjusting fixture 91 after predetermined position after hipbone, forward rotating shaft rod 102 expands the first expansion part 103, second
Part 403 and third expansion part 603 are centered on the axle center 101c of casing 101, radial outward dilations, for increasing hip screw
The area and stability contacted with femur bulb periphery cancellous bone, prevent hip screw from further rotating inside femur bulb,
It is prominent to wear or loosen, it can be greatly reduced in the fixed surgical procedure of hip joint, the risk that bone cuts effect occurs.
However, the application range of expansible orthopaedics implant provided by the present invention, is not limited thereto.Above-described embodiment
Provided expansible orthopaedics implant, still can be applied among other bone surgeries, for affected part bone is fixed, even
Connect, fill, support, stretch or provide other possible physics or physiological function.For example, among the embodiment of the present invention, on
Stating expansible orthopaedics implant can be applied to distensible ligament bone nail, distensible vertebra centrum retaining frame (cage), expansible
Pedicle screw (pedicle screw) or other suitable orthopaedics implants.
According to above-described embodiment, the present invention is to provide a kind of expansible orthopaedics implant, including be sheathed on a casing
In a shaft and an expansion part and a connecting rod.Wherein, one end of expansion part and connecting rod is frames rotatably mounted relative to one another, and the two
The other end is then articulated on casing and connecting rod respectively.By pushing connecting rod that can drive the second end of expansion part, along vertical central
Direction far from axle center, form a braking structure expanded outwardly by sleeve edge, orthopaedics implant and periphery pine can be increased
The area and stability of matter bone contact, prevent orthopaedics implant from further rotating in inside bone, it is prominent wear or loosen, can substantially drop
Low bone cuts the risk of effect.
Although disclosing the present invention in conjunction with preferred embodiment above, it is not intended to limit the invention, any skill
Have usually intellectual in art field, without departing from the spirit and scope of the present invention, can make some changes and embellishment, therefore
Protection scope of the present invention should be subject to what the appended claims were defined.
Claims (20)
1. a kind of expansible orthopaedics implant characterized by comprising
Casing, with the first opening, the second opening and across the axle center of first opening and second opening；
Shaft, one end are arranged among the casing, the outside that there is the other end top to protrude from first opening；
First expansion part, has a first end and a second end, which is articulated in the casing；And
First connecting rod has and is articulated in the first proximal end (proximal end) at the top of this and is articulated in the first of the second end
Distally (distal end)；
When the top along the axle center an extending direction far from this first opening when, will push the first connecting rod drive this second
End, along a first direction in the vertical axle center far from the axle center.
2. expansible orthopaedics implant as described in claim 1, wherein the shaft and the first connecting rod are accompanied between 175 ° extremely
An angle between 90 °.
3. expansible orthopaedics implant as described in claim 1, wherein the first end passes through one first pivot and the casing pivot
It connects, which has one first arm of force of vertical first pivot, and the axle center and first arm of force are accompanied between 0 °
An angle between to 70 °.
4. expansible orthopaedics implant as claimed in claim 3, wherein the first connecting rod passes through one second pivot and the top
Pivot joint, the first connecting rod have second arm of force of vertical second pivot；And the second end and first distal end be articulated in this
One crosspoint of one arm of force and second arm of force.
5. expansible orthopaedics implant as described in claim 1, wherein first expansion part include ontology interconnected with
And first bending section；The first end is located on the body part, and is pivotally connected by one first pivot and the casing；The body part has
One first arm of force of vertical first pivot；And the second end is located on first bending section, and far from first arm of force.
6. expansible orthopaedics implant as described in claim 1, wherein the first connecting rod include rod body part interconnected with
And second bending section, this first is proximally located in the rod body part, and by one second pivot and top pivot joint, and the rod body part
One second arm of force with vertical second pivot；First distal end is located on second bending section, and far from second arm of force.
7. expansible orthopaedics implant as described in claim 1, wherein the casing has multiple through holes, positioned at being used to define
On an at least tube wall for first opening and second opening.
8. expansible orthopaedics implant as described in claim 1, wherein first expansion part has curved plate-like structure, in parallel
The casing is used to define an at least tube wall for first opening and second opening.
9. expansible orthopaedics implant as claimed in claim 8, wherein first expansion part has the first helical form protrusion,
A surface positioned at first expansion part far from the axle center, and around the axle center.
10. expansible orthopaedics implant as claimed in claim 9, wherein the casing has the second helical form protrusion, is located at
The outside of the tube wall, and around the axle center.
11. expansible orthopaedics implant as described in claim 1, further includes:
Third helical form protrusion is convexly equipped in at least tube wall for being used to define first opening and second opening in the casing
Inside；And
First spiral groove, a recessed surface in the shaft, and mutually screwed togather with the third helical form protrusion.
12. expansible orthopaedics implant as described in claim 1, further includes:
Second spiral groove, the recessed at least tube wall for being used to define first opening and second opening in the casing
Inside；And
4th helical form protrusion is convexly equipped in a surface of the shaft, and this is mutually screwed togather with second spiral groove.
13. expansible orthopaedics implant as described in claim 1, wherein the shaft is a tubular structure, is had across the top
One long through-hole in portion.
14. expansible orthopaedics implant as described in claim 1, in which:
The casing includes first part interconnected and second part；The first part has the diameter with first opening
Identical first internal diameter；The second part has the second internal diameter greater than the diameter；
The shaft includes Part III and Part IV interconnected；The Part III, which has, is less than or equal to first internal diameter
First diameter, and be arranged among the first part；The Part IV has less than or equal to second internal diameter, and be greater than this first
The second diameter of internal diameter.
15. expansible orthopaedics implant as claimed in claim 14, wherein the casing, which has, stops platform, it is located at this first
Point and the first link position of the second part on；There is the shaft protrusion trip to be located at the Part III and the 4th
On the second partial link position.
16. expansible orthopaedics implant as described in claim 1 further includes bottom anti-rotation design, embolism is in the casing
Among, and contacted with a tail end of the shaft.
17. expansible orthopaedics implant as described in claim 1, further includes:
Second expansion part has third end and the 4th end, which is articulated in the casing；And
Second connecting rod has the second distal end for being articulated in the second proximal end at the top of this and being articulated in the 4th end；
When the top along the extending direction far from the opening when, will push the second connecting rod and drive the 4th end, along vertical
One second direction in the axle center is far from the casing.
18. expansible orthopaedics implant as claimed in claim 17, wherein the first direction and the second direction press from both sides a straight angle
Or the non-straight angle.
19. expansible orthopaedics implant as claimed in claim 17, further includes:
Third expansion part has the 5th end and the 6th end, and the 5th end is articulated in the casing；And
Third connecting rod has the third distal end for being articulated in the third proximal end at the top of this and being articulated in the 6th end；
When the top along the extending direction far from the opening when, will push the third connecting rod and drive the 6th end, along vertical
One third direction in the axle center is far from the casing.
20. expansible orthopaedics implant as claimed in claim 18, wherein the first direction and the second direction press from both sides one first
Angle；Two direction and the third direction press from both sides a third angle；And first angle is equal to or more than second angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711468772.8A CN109965964B (en) | 2017-12-28 | 2017-12-28 | Expandable orthopedic implant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711468772.8A CN109965964B (en) | 2017-12-28 | 2017-12-28 | Expandable orthopedic implant |
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| CN109965964A true CN109965964A (en) | 2019-07-05 |
| CN109965964B CN109965964B (en) | 2021-03-30 |
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| CN201711468772.8A Active CN109965964B (en) | 2017-12-28 | 2017-12-28 | Expandable orthopedic implant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112704557A (en) * | 2019-10-25 | 2021-04-27 | 可成生物科技股份有限公司 | Customized construction method and system for modular bone plate lamination |
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| US20080262497A1 (en) * | 2005-10-18 | 2008-10-23 | Baat Holding B.V. | Medical Device for Treating Broken Bones or Fixing Stabilising Elements to Bone Parts |
| US20090018590A1 (en) * | 2007-07-13 | 2009-01-15 | Stryker Trauma Gmbh | Device for fixation of bone fractures |
| CN102451034A (en) * | 2010-10-21 | 2012-05-16 | 林智一 | Skeleton fixing device |
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| Publication number | Publication date |
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| CN109965964B (en) | 2021-03-30 |
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