CN208838251U - A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner - Google Patents
A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner Download PDFInfo
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- CN208838251U CN208838251U CN201721407484.7U CN201721407484U CN208838251U CN 208838251 U CN208838251 U CN 208838251U CN 201721407484 U CN201721407484 U CN 201721407484U CN 208838251 U CN208838251 U CN 208838251U
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- acetabular bone
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Abstract
A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner, including acetabular bone liner, it is characterized in that, lining is equipped with semi-spherical grooves in the acetabular bone, and the edge one elongation moulding of semi-spherical grooves has super radius button side, and the inside of acetabular bone liner is equipped with femoral head prosthesis, the femoral head prosthesis is spherical in shape, the inner space of femoral head prosthesis and acetabular bone liner is in the same size, and the diameter of the opening on super radius button side is less than the diameter of femoral head prosthesis, and femoral head prosthesis is equipped with neck of femur prosthese.
Description
Technical field
The utility model relates to medical fields, and in particular to a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner.
Background technique
Artificial total hip arthroplasty be used as the old hip joint severe osteoarthritic for the treatment of, caput femoris necrosis advanced stage and
Fracture of neck of femur routine operation, operative effect have obtained clinical affirmative, have controlled from the earliest period hip replacement surgery sixties
Elderly patient severe osteoarthritic disease is treated, young patient restores hip joint good function by hip replacement till now, raw
The progress of object engineering science and materialogy undoubtedly plays very important effect, but there is also some concurrent for hip replacement
Disease, such as aseptic loosening, Periprosthetic infection and management of dislocation following total hip arthroplasty.Previously research report hip replacement
Prothesis dislocation incidence is 1%~3%, is only second to aseptic loosening, the hair of the artificial dislocation of hip joint after artificial semi-pelvis displacement technique
Raw rate is up to 8.3%, and the postoperative displacement rate of hip revision then may be up to 5%~20%, and furthermore document also reports that hip joint is set
It changes the probability that prothesis dislocation occurs again in postoperative first dislocation patient and is up to 55%.After Redislocation guard or revision procedure not only
Increase length of patient stay, influences postoperative function recovery, while also resulting in medical resource and additionally consuming.Previously research has defined
Point out the numerous influence factors, including patient's oneself factor, prosthetic designs and surgical technic etc. of management of dislocation following total hip arthroplasty.
Therefore we can prevent management of dislocation following total hip arthroplasty by improving prosthetic designs.From mechanics, the dislocation of hip joint is
Late-segmental collapse is first vertically parallel to the movement on acetabular bone surface again, is the knot for promoting and preventing two kinds of strength of dislocation from confronting with each other
Fruit, hip joint activity are more than the shock that a certain range just will appear lesser trochanter or femoral prosthesis and acetabular bone and its surrounding soft tissue,
If the strength of dislocation is prevented to be not enough to stop this tendency, will dislocate.
In addition the tension of the stabilization of hip joint and the containing in joint and surrounding soft tissue has relationship, if joint containment relationship
Bad such as acetabular bone or femoral stem lean forward or acetabular bone outreach position is placed bad acetabular bone and the femoral head of will lead to and is contained
Difference, hip joint scope of activities needed for daily routines this may result in hitting to dislocate.Furthermore soft group around hip joint
The tension knitted is the principal element of confrontation dislocation, if the reason of patient is because of in terms of neuromuscular leads to around hip joint soft group
Tension difference is knitted, then the stability of hip joint is with regard to poor, so as to cause dislocation.In addition, routine hip prosthesis uses acetabular bone at present
The design of liner minor radius, in order that femoral head in art is facilitated to squeeze into, but this design does not include anti-dislocation mechanism, only leans on acetabular bone
The containment relationship and surrounding soft tissue's tension of prosthese and femoral head are constrained, and this prosthetic designs undoubtedly will increase postoperative prosthese
Displacement rate.For this purpose, part of the manufacturer prevents the dislocation of hip joint by increasing femoral head diameter and increasing acetabular bone liner flash.Machine
Principle processed are as follows: 1. femorals head are bigger, and dislocation required jumping out occurs, and distance is bigger, and hip joint is more stable, but there is also disadvantages
End.Firstly, acetabular bone thickness of inner lining will certainly be reduced by increasing femoral head diameter, to influence the service life of acetabular bone liner.Furthermore previously
Research finds that the diameter for increasing femoral head will increase the abrasion between acetabular bone liner and femoral head, to influence the service life of prosthese.
Acetabular bone liner is formed into super radius 2. increasing acetabular bone liner part flash, acetabular bone liner can be increased in this way to the packet of femoral head
Hold, but acetabular bone liner and femoral head are separately manufacturings at present, it is contemplated that femoral head is squeezed into art, and acetabular bone liner flash is set
In respect of limit, result is also that can only reduce dislocation to a certain degree.In conclusion the anti-dislocation skill of current hip replacement
Art effect is limited, and there are drawbacks.
In addition, hip or near end of thighbone tumor patient hip joint surrounding soft tissue function are very poor, lead to postoperative dislocation rate
It is apparently higher than common hip replacement.Acetabular bone and femoral head prosthesis are seperated forging, and hip prosthesis is super radial design, institute
Super radial design is called, i.e. hip joint liner has been more than hemispherical, and certain coating is formd to femoral head, and hip joint liner is outside
Extension is more than that the radian of radius is known as super radius arcuate.However on the one hand its locking mechanism is mechanicalness locking, by acetabular bone
The super radius flash of liner constrains femoral head, in order to can guarantee the merging of femoral head in art, the super radius model of acetabular bone liner
It is with limit, furthermore femoral head needs external force to squeeze by force in art, and this implantation mode can damage its locking mechanism, in clinical observation
The postoperative dislocation of hip joint still has generation.And it be easy to cause hip joint recurrent to dislocate after first dislocation.
2012 Britain famous magazine " economist " deliver special report, it is indicated that global industry is undergoing third time work
Industry revolution, wherein 3D printing is most representative.3D printing technique is academicly also known as " addition manufacture " technology, also referred to as increasing material
Manufacture or increment manufacture.American Society Testing and Materials (ASTM) define 3D printing technique be based on three-dimensional CAD model data,
By way of increasing material and successively manufacturing.3D printing has following advantage and characteristic: 1. numerical DC speeds: will by CAD software
Product structure digitlization, driving machinery equipment fabricate device.2. Layered manufacturing: three-dimensional structure object is first resolved into two dimension
Structure, it is successively cumulative to form three-dimensional article.Therefore, 3D printing technique can produce the structure of any complexity in principle.3. heap
Product manufacture: the accumulation mode of " from below to up " is for realizing non-even cause material, functionally gradient device advantageously.3D printing at present
Technology can print the thing that conventional fabrication process can not manufacture, therefore we may be implemented completely using the technology
The acetabular bone liner for the anti-dislocation that we want is printed on femoral head.
Secure lock between acetabular bone liner and femoral head is realized by increasing acetabular bone liner flash, to effectively prevent
Femoral head abjection.It is not good enough and seriously soft group of hip tumor post-operation that this design is specially adapted to hip joint surrounding soft tissue tension
The patient of defect is knitted, it can promote the rehabilitation of hip replacement patient's early stage progress function, to improve surgical effect.
Utility model content
The purpose of this utility model is exactly to utilize 3D printing technique, acetabular bone liner is directly printed upon on femoral head, entirely
Hip joint is an entirety.And the super radius bound edge of acetabular bone liner substantially increases, and realizes between acetabular bone liner and femoral head securely
Locking, to effectively prevent femoral head from deviating from.
The utility model is achieved by the following technical solution:
A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner, including femoral head prosthesis, on the femoral head prosthesis
It is cased with 3D printing acetabular bone liner, 3D printing acetabular bone liner includes semi-spherical grooves, and the edge one elongation moulding of semi-spherical grooves has super
Radius button side, the inner space of femoral head prosthesis and 3D printing acetabular bone liner is in the same size, the diameter of the opening on super radius button side
Less than the diameter of femoral head prosthesis, femoral head prosthesis is equipped with neck of femur prosthese.
Further to improve, the inner space of the 3D printing acetabular bone liner is segment-shaped, and the super radius button side surpasses
Radius arcuate is 15 ° ~ 45 °.
Further to improve, the super radius arcuate on the super radius button side is 20 °.
Further to improve, the super radius button side includes the first low spot arranged in the direction of the clock, the first high point, the
Two low spots and the second high point, adjacent point-to-point transmission are smooth curve connection between quadrant and adjacent two o'clock；Super half
Diameter button side not super radius at the first low spot and the second low spot, super radius button side at the first high point super radius arcuate be 10 °-
40 °, super radius button side super radius arcuate at the second high point is 5 ° -25 °.
Further to improve, the sum of super radius arcuate at the first high point and the second high point is less than 45 °.
Further to improve, the 3D printing acetabular bone liner is made of high cross-linking polyethylene materials.
Further to improve, the femoral head prosthesis is made of ceramic material or metal material.
A kind of manufacturing method of the anti-dislocation hip prosthesis of 3D printing acetabular bone liner, includes the following steps:
Step 1) femoral head prosthesis produced according to specification；
Step 2) three-dimensional model that 3D printing acetabular bone liner is designed according to the size of femoral head prosthesis, by femoral head vacation
Body is put into 3D printer, prints 3D printing acetabular bone liner in the outside of femoral head prosthesis using high crosslinked polyethylene；
Step 3) in femoral head prosthesis over-assemble neck of femur prosthese.
Compared with prior art, the utility model has the advantage that
The design forges manufacturing process by changing the past acetabular bone liner and femoral head fission, by 3D printing technique by hip
Mortar liner is directly printed upon on femoral head, and product is integrally formed, and is placed in technology without the concern for femoral head, can be closed guaranteeing hip
Under the premise of saving mobility, increase the flash and super radius readings of liner to the greatest extent, it in this way can significantly more efficient increase hip
Constraint between mortar liner and femoral head prevents the generation of dislocation.
Detailed description of the invention
Fig. 1 is 1 schematic diagram of embodiment；
Fig. 2 is 1 longitudal section schematic diagram of embodiment；
Fig. 3 is 2 schematic diagram of embodiment；
Fig. 4 is 2 longitudal section schematic diagram of embodiment；
Fig. 5 is 2 longitudinally-moving range schematic diagram of embodiment；
Fig. 6 is the laterally movable range schematic diagram of embodiment 2.
Specific embodiment
Embodiment 1
Hip prosthesis as depicted in figs. 1 and 2, including acetabular bone liner, including femoral head prosthesis 3, the femoral head are false
3D printing acetabular bone liner is cased on body, 3D printing acetabular bone liner includes semi-spherical grooves 1, and the edge of semi-spherical grooves 1 integrally extends into
Type has super radius to buckle side 2, and femoral head prosthesis 3 and the inner space of 3D printing acetabular bone liner 1 are in the same size, super radius button side 2
The diameter of opening is less than the diameter of femoral head prosthesis 3, and femoral head prosthesis 3 is equipped with neck of femur prosthese.(in sectional view in femoral head
Between square groove be install neck of femur position).3D printing acetabular bone liner 1 is made of high cross-linking polyethylene materials, femoral head
Prosthese is made of metal material.
The manufacturing method of the prosthese includes the following steps:
Step 1) femoral head prosthesis produced according to specification；
Step 2) three-dimensional model that 3D printing acetabular bone liner is designed according to the size of femoral head prosthesis, by femoral head vacation
Body is put into 3D printer, prints 3D printing acetabular bone liner in the outside of femoral head prosthesis using high crosslinked polyethylene；
Step 3) in femoral head prosthesis over-assemble neck of femur prosthese.
In this embodiment, the internal space design that lining is used to be placed in femoral head prosthesis in acetabular bone is a segment-shaped,
The radius of bone prosthese and the radius of the segment are essentially identical, and the super radius arcuate on super radius button side is 20 °, i.e. super radius button side
Integrally extend 20 ° of radian outward by semi-spherical grooves to be formed, this super radial design is far longer than current split-type design
Hip prosthesis, therefore femoral head prosthesis can be firmly buckled in inside acetabular bone liner by super radius button side, do not fallen out.Super radius
Radian may range from 15 ° ~ 45 °, and anti-dislocation effect is poor if too small, will affect the flexibility ratio in joint if too big.
Embodiment 2
As shown in Figure 3 and Figure 4, the super radius button side of lining is undulated design in acetabular bone in this embodiment, including two
A high point and double bottom, adjacent point-to-point transmission are smooth curve connection between quadrant and adjacent two o'clock；Super half
Diameter button side not super radius at the first low spot and the second low spot, super radius button side at the first high point super radius arcuate be 10 °-
40 °, super radius button side super radius arcuate at the second high point is 5 ° -25 °.And the first super arc of radius at high point and the second high point
The sum of degree is less than 45 °.It is equivalent to and integrally extends two wavy super radius button sides in semi-spherical grooves upper and lower part, and
The junction of two waves forms the groove of left and right two, and (acetabular bone liner top waveform protrusion is the first high point, recess in Fig. 3
Minimum point is the second low spot, and lower wave shape protrusion is the second high point, and the first low dot location and the second low spot are symmetrical).Two waves
The super radius button side of wave-like can play the role of anti-dislocation, and two grooves of left and right increase the movable model of hip joint or so
It encloses.And after the completion of femoral head prosthesis printing, the operations such as polishing processing can be carried out by two grooves.
Fig. 5 and Fig. 6 illustrates the scope of activities of the hip prosthesis of embodiment 2, it is seen that super using the wave of embodiment 2
The design of radius button side, can realize the limit of femoral head under the premise of not influencing joint motion completely.
Claims (7)
1. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner, including femoral head prosthesis, which is characterized in that the femur
3D printing acetabular bone liner is cased on head prosthesis, 3D printing acetabular bone liner includes semi-spherical grooves, and the edge of semi-spherical grooves integrally extends
Super radius button side is formed, the inner space of femoral head prosthesis and 3D printing acetabular bone liner is in the same size, and super radius button side is opened
The diameter of mouth is less than the diameter of femoral head prosthesis, and femoral head prosthesis is equipped with neck of femur prosthese.
2. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as described in claim 1, which is characterized in that the 3D
The inner space for printing acetabular bone liner is segment-shaped, and the super radius arcuate on the super radius button side is 15 ° ~ 45 °.
3. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as claimed in claim 2, which is characterized in that described super
The super radius arcuate on radius button side is 20 °.
4. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as described in claim 1, which is characterized in that described super
Radius button side includes the first low spot arranged in the direction of the clock, the first high point, the second low spot and the second high point, adjacent point-to-point transmission
It is smooth curve connection between quadrant and adjacent two o'clock；Super radius button side is at the first low spot and the second low spot
Not super radius, super radius button side super radius arcuate at the first high point is 10 ° -40 °, and super radius button side surpasses half at the second high point
Diameter radian is 5 ° -25 °.
5. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as described in claim 1, which is characterized in that first is high
The sum of super radius arcuate at point and the second high point is less than 45 °.
6. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as described in claim 1, which is characterized in that the 3D
Printing acetabular bone liner is made of high cross-linking polyethylene materials.
7. a kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner as described in claim 1, which is characterized in that the stock
Bone prosthese is made of ceramic material or metal material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721407484.7U CN208838251U (en) | 2017-10-27 | 2017-10-27 | A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721407484.7U CN208838251U (en) | 2017-10-27 | 2017-10-27 | A kind of anti-dislocation hip prosthesis of 3D printing acetabular bone liner |
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| CN208838251U true CN208838251U (en) | 2019-05-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693164A (en) * | 2017-10-27 | 2018-02-16 | 北京大学国际医院 | The anti-dislocation hip prosthesis and its manufacture method of a kind of 3D printing acetabular bone liner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107693164A (en) * | 2017-10-27 | 2018-02-16 | 北京大学国际医院 | The anti-dislocation hip prosthesis and its manufacture method of a kind of 3D printing acetabular bone liner |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190510 Termination date: 20191027 |
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| CF01 | Termination of patent right due to non-payment of annual fee |