CN110192936A - Ankle prosthesis - Google Patents
Ankle prosthesis Download PDFInfo
- Publication number
- CN110192936A CN110192936A CN201910459580.3A CN201910459580A CN110192936A CN 110192936 A CN110192936 A CN 110192936A CN 201910459580 A CN201910459580 A CN 201910459580A CN 110192936 A CN110192936 A CN 110192936A
- Authority
- CN
- China
- Prior art keywords
- prosthese
- porous structure
- dimensional porous
- structure sheaf
- linkage section
- 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
- 210000003423 ankle Anatomy 0.000 title claims abstract description 52
- 210000004233 talus Anatomy 0.000 claims abstract description 81
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 62
- 241001061264 Astragalus Species 0.000 claims abstract description 54
- 235000006533 astragalus Nutrition 0.000 claims abstract description 54
- 108010048734 sclerotin Proteins 0.000 claims abstract description 14
- 210000002303 tibia Anatomy 0.000 claims description 27
- 239000011148 porous material Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims 1
- 238000003780 insertion Methods 0.000 claims 1
- 238000006073 displacement reaction Methods 0.000 abstract description 7
- 238000010586 diagram Methods 0.000 description 9
- 210000000544 articulatio talocruralis Anatomy 0.000 description 8
- 230000006378 damage Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 7
- 206010017076 Fracture Diseases 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 230000036541 health Effects 0.000 description 5
- 208000010392 Bone Fractures Diseases 0.000 description 4
- 230000004069 differentiation Effects 0.000 description 4
- 230000002980 postoperative effect Effects 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229910001069 Ti alloy Inorganic materials 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 3
- 230000004927 fusion Effects 0.000 description 3
- 208000014674 injury Diseases 0.000 description 3
- 210000000281 joint capsule Anatomy 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 238000010079 rubber tapping Methods 0.000 description 3
- 210000004872 soft tissue Anatomy 0.000 description 3
- 208000024779 Comminuted Fractures Diseases 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000006056 electrooxidation reaction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 210000000963 osteoblast Anatomy 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000001356 surgical procedure Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229910000883 Ti6Al4V Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000009958 sewing Methods 0.000 description 1
- 210000000130 stem cell Anatomy 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30721—Accessories
- A61F2/30749—Fixation appliances for connecting prostheses to the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/30767—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth
- A61F2/30771—Special external or bone-contacting surface, e.g. coating for improving bone ingrowth applied in original prostheses, e.g. holes or grooves
- A61F2002/30772—Apertures or holes, e.g. of circular cross section
- A61F2002/3079—Stepped or enlarged apertures, e.g. having discrete diameter changes
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
- A61F2002/4205—Tibial components
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
- A61F2/02—Prostheses implantable into the body
- A61F2/30—Joints
- A61F2/42—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes
- A61F2/4202—Joints for wrists or ankles; for hands, e.g. fingers; for feet, e.g. toes for ankles
- A61F2002/4207—Talar components
Abstract
The present invention relates to medical prosthesis technical fields, disclose a kind of ankle prosthesis.The ankle prosthesis includes: tibial prosthesis, and tibial prosthesis includes first end and the second end, and anti-back screw assembly is formed on the periphery wall of the second end；Or astragalus prosthese, astragalus prosthese include that astragalus pad prosthese and one end are fixedly connected with astragalus pad prosthese, the other end is used for the body of talus prosthese connecting with root bone fixation, is formed with anti-back screw assembly on body of talus prosthese.Wherein, anti-back screw assembly includes the screw with the integrally formed nut of corresponding prosthese and for cooperating with nut, screw includes for passing through nut and corresponding prosthese to enter the first linkage section of sclerotin, the second linkage section for being coaxially connected with the first linkage section and being used to be connected with nut, the diameter of second linkage section is greater than the diameter of the first linkage section, and three-dimensional porous structure sheaf is at least formed on the outer surface of the second linkage section.It is more stable after ankle prosthesis displacement of the invention.
Description
Technical field
The present invention relates to medical prosthesis technical field more particularly to a kind of ankle prosthesis.
Background technique
Ankle prosthesis is to be used to plant instead of the surgery at human body sufferer ankle-joint position applied in ankle-joint displacement technique
Enter object.When the ankle-joint of human body needs to repair because of sufferer, or when meeting with tumour or comminuted fracture, tend to make
At the severe bone of the distal end of the shin bone of ankle-joint, serious bone defect not only enables the carrying of the power of the osteotomy site of shin bone
Power is deteriorated, and is also easy to that the attachment point defect of the muscle of ankle or joint capsule is led to problems such as to damage, needs to select to fit at this time
The ankle prosthesis of conjunction replaces the ankle-joint of sufferer.
Current existing ankle prosthesis is mainly made of tibial plate, astragalus support and polyethylene liner three parts, wherein shin
Bone plate is connected with the shin bone of human body, and astragalus support is connected with the astragalus of human body, and polyethylene liner can be relative to tibial plate and astragalus support
Movable function free to slide to realize ankle prosthesis.However, ankle prosthesis in the prior art is often because of the sclerotin of patient
It is poor and it is caused to be not fixed firmly, so that ankle prosthesis is easy to loosen, to give the initial stage Bone Ingrowth band of ankle prosthesis
Difficulty is carried out, and then has been easy to influence the medium-term and long-term stability of ankle prosthesis.
In view of the deficiencies of the prior art, those skilled in the art is badly in need of seeking a kind of ankle pass more stable after displacement
Prosthese is saved, to make up the deficiencies in the prior art.
Summary of the invention
The invention proposes a kind of ankle prosthesis, keep it more stable after displacement.
Ankle prosthesis according to the present invention includes: tibial prosthesis, and tibial prosthesis includes first for being connected with shin bone
End, and the second end for being slidably connected with astragalus are formed with anti-back screw assembly on the periphery wall of the second end；Or away from
Bone prosthese, astragalus prosthese include that astragalus pad prosthese for being slidably connected with shin bone and one end and astragalus pad prosthese and be fixedly connected,
The other end is used for the body of talus prosthese connecting with root bone fixation, is formed with anti-back screw assembly on body of talus prosthese.Wherein, anti-back
Screw assembly include with the integrally formed nut of corresponding prosthese, and the screw for cooperating with nut, screw includes for wearing
Nut and corresponding prosthese are crossed to enter the first linkage section of sclerotin, and is coaxially connected and is used for and nut phase with the first linkage section
The second linkage section even, the diameter of the second linkage section are greater than the diameter of the first linkage section, and at least in the appearance of the second linkage section
Three-dimensional porous structure sheaf is formed on face.
Further, three-dimensional porous structure sheaf is also formed on the inner surface of nut matched with the second linkage section.
Further, three-dimensional porous structure sheaf is also formed on the outer surface of the first linkage section and/or the outer surface of nut.
Further, the thickness for being formed in the three-dimensional porous structure sheaf of the outer surface of the second linkage section is less than or equal to be formed in
The thickness of the three-dimensional porous structure sheaf of the outer surface of first linkage section, the thickness for being formed in the three-dimensional porous structure sheaf on nut are big
In the thickness of the three-dimensional porous structure sheaf for the outer surface for being formed in the first linkage section.
Further, the internal diameter of nut is the 90% to 95% of the size of the outer diameter of the second linkage section.
Further, three-dimensional porous structure is formed on the first end of tibial prosthesis and/or the periphery wall of the second end
Three-dimensional porous structure sheaf is formed on the outer surface of layer or body of talus prosthese.
Further, three-dimensional porous structure sheaf include a plurality of string diameter and be crossed-over by a plurality of string diameter formed it is multiple
Hole, each hole are interconnected, wherein are formed in the diameter of each hole in the three-dimensional porous structure sheaf on anti-back screw assembly
Range is 200 μm to 800 μm, and the range of the porosity of three-dimensional porous structure sheaf is 30% to 80%；It is formed in tibial prosthesis
First end and/or the second end periphery wall on, or the three-dimensional porous structure being formed on the outer surface of body of talus prosthese
Layer in each hole diameter range be 100 μm to 600 μm, and the range of the porosity of three-dimensional porous structure sheaf be 50% to
90%.
Further, first end includes inserting paragraph for being inserted into the pulp cavity of shin bone and is connected with inserting paragraph and is used for
The connecting section abutted with the end face of shin bone, be formed in each hole in the three-dimensional porous structure sheaf in inserting paragraph diameter be greater than etc.
The diameter of each hole in the three-dimensional porous structure sheaf being formed on connecting section, the three-dimensional porous structure being formed on connecting section
The diameter of the diameter of each hole in layer and each hole in the three-dimensional porous structure sheaf being formed on the periphery wall of the second end
It is equal.
Further, be formed in the three-dimensional porous structure sheaf on the outer surface of body of talus prosthese thickness range be 2mm extremely
4mm。
Further, on the periphery wall of the second end, on the side wall of astragalus pad prosthese and body of talus prosthese is respectively formed on
Have through multiple suture holes of corresponding prosthese.
Compared with prior art, ankle prosthesis of the invention has the advantage that
1) tibial prosthesis or astragalus prosthese that ankle prosthesis of the invention includes can be used for replacing patient, and there are bone defects
Shin bone or astragalus, without by patient health bone portion replace simultaneously, so as to avoid full ankle in the prior art
The displacement of articular prosthesis and patient health bone caused by unnecessary injury the problem of.
2) anti-back screw assembly, spiral shell therein are formed on the tibial prosthesis of ankle prosthesis of the invention or astragalus prosthese
The first linkage section with diameter segment of nail can quickly go deep into the sclerotin of human body fixing with the sclerotin of human body, have larger
Second linkage section of diameter segment can be firmly secured at together by the three-dimensional porous structure sheaf of its outer surface with nut, the setting
The fixed effect between screw and nut is not only increased, the bone tissue of the second linkage section and human body is also enabled preferably to melt
It closes, to effectively raise the stability of the fixation of corresponding prosthese, ensure that the initial stage Bone Ingrowth of prosthese and medium-term and long-term
Stability；
3) present invention is by the way that nut to be integrally formed with corresponding prosthese, and screw with nut cooperates second connect
Section, even if patient can send out in active procedure because of the double action of shearing force and the intracorporal electrochemical corrosion of people that screw is subject to
Life fractures, i.e., fractures in the junction of the first linkage section and the second linkage section, the second linkage section of screw can still consolidate
Ground is connected in nut, to not only further ensure that the stability of the fixation of corresponding prosthese, will not also make to fracture
Second linkage section is formed as metallic foreign body, and causes to damage to patient.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.In all the appended drawings, similar element
Or part is generally identified by similar appended drawing reference.In attached drawing, each element or part might not be drawn according to actual ratio.
Fig. 1 is the structural schematic diagram of ankle prosthesis according to the present invention, and the shin of tibial prosthesis and human body is shown
The connection schematic diagram of bone and astragalus；
Fig. 2 is the structural schematic diagram of ankle prosthesis according to the present invention, and the shin of astragalus prosthese and human body is shown
The connection schematic diagram of bone and root bone；
Fig. 3 is that the enlarged drawing at A shown in Fig. 2, wherein nut and body of talus prosthese are integrally formed；
Fig. 4 is the structural schematic diagram of Fig. 1 and anti-back screw assembly shown in Fig. 2；
Fig. 5 is the structural schematic diagram of screw shown in Fig. 4.
Specific embodiment
It is described in detail below in conjunction with embodiment of the attached drawing to technical solution of the present invention.Following embodiment is only used for
Clearly illustrate technical solution of the present invention, therefore be only used as example, and cannot be used as a limitation and limit protection model of the invention
It encloses.
Fig. 1 shows the structural schematic diagram of ankle prosthesis 100 according to the present invention, be shown tibial prosthesis 1 with
The shin bone 11 of human body and the connection schematic diagram of astragalus 13, Fig. 2 shows the structures of ankle prosthesis 100 according to the present invention to show
It is intended to, the shin bone 21 of astragalus prosthese 2 and human body and the connection schematic diagram of root bone 23 is shown.Referring to figs. 1 and 2,
Ankle prosthesis 100 of the invention includes: tibial prosthesis 1, as shown in Figure 1, tibial prosthesis 1 includes for being connected with shin bone 11
First end 12, and the second end 14 for being slidably connected with astragalus 13 are formed with anti-back on the periphery wall of the second end 14
Screw assembly 3；Or astragalus prosthese 2, as shown in Fig. 2, astragalus prosthese 2 includes the astragalus pad prosthese for being slidably connected with shin bone 21
22 and one end and astragalus pad prosthese 22 be fixedly connected, the other end is used for the body of talus prosthese 24 being fixedly connected with root bone 23, astragalus
Anti-back screw assembly 3 is formed on body prosthese 24.In conjunction with shown in Fig. 3 to Fig. 5, anti-back screw assembly 3 includes and corresponding prosthese
(such as tibial prosthesis shown in FIG. 11 or astragalus prosthese 2 shown in Fig. 2) integrally formed nut 31, and for matching with nut 31
The screw 32 of conjunction, as shown in figure 5, screw 32 includes the first connection for passing through nut 31 and corresponding prosthese to enter sclerotin
Section 321, and with coaxial the second linkage section 322 being connected and be used to be connected with nut 31 of the first linkage section 321, the second linkage section
322 diameter is greater than the diameter of the first linkage section 321, and it is more to be at least formed with solid on the outer surface of the second linkage section 322
Pore structure layer 4.
Ankle prosthesis 100 of the invention is when in use comprising tibial prosthesis 1 or astragalus prosthese 2 can be used for replacing
There are the shin bone of bone defect or astragalus by patient, for example, by taking Fig. 1 as an example, when there is a large amount of bone defect in the shin bone 11 of patient,
Can the tibial prosthesis 1 of ankle prosthesis 100 through the invention replaced, without by the astragalus 13 of the health of patient simultaneously
Displacement, causes unnecessary injury to avoid to patient；By taking Fig. 2 as an example, when the astragalus of patient needs to replace, and can be by this hair
The astragalus prosthese 2 of bright ankle prosthesis 100 only replaces the part of astragalus.Therefore, ankle prosthesis 100 of the invention
It can be realized the shin bone of patient or the aliquot replacement of astragalus.And ankle prosthesis 100 of the invention is in its tibial prosthesis 1 or astragalus
It is formed with anti-back screw assembly 3 on prosthese 2, also makes the fixation of ankle prosthesis 100 of the invention more firm, specifically,
When in use, the first linkage section 321 can be first passed through to nut 31 and corresponding prosthese (such as tibial prosthesis 1 or astragalus prosthese
2) it is connected to after in the sclerotin of human body, the second linkage section 322 is threadedly coupled with nut 31 further to fix corresponding prosthese
In affected part, by the three-dimensional porous structure sheaf 4 formed on the outer surface of the second linkage section 322, so that the second linkage section 322
Outer surface is formed similarly to the trabecular bone structure of human body, on the one hand which can increase the outer surface of the second linkage section 322
Frictional force, so that screw 32 is made to be difficult to deviate from again after cooperating with nut 31, and then can be improved the fixation of corresponding prosthese
Stablizing effect；On the other hand also there is positive effect to the regeneration of the differentiation of stem cell, soft tissue, and production can be induced well
Raw dystopy bone, improves the adherency, increment, differentiation capability of osteoblast, so that the surface of the second linkage section 322 can obtain
The ability that better Bone Ingrowth and bone are creeped, so that bone tissue can quickly be grown into the three-dimensional porous structure sheaf 4.
Since bone tissue is easier to grow into the three-dimensional porous structure sheaf 4, bone tissue is allowed to provide screw 32 additional fixed work
With this just further enhances the fixed effect of screw 32, to further improve the stability of corresponding prosthese.
It should be noted that the size of the first linkage section 321 and the diameter of the second linkage section 322 should understand that in the present invention
Being includes the thickness value for forming three-dimensional porous structure sheaf 4 on its outer surface.
Compared with prior art, ankle prosthesis 100 of the invention has the advantage that
1) tibial prosthesis 1 or astragalus prosthese 2 that ankle prosthesis 100 of the invention includes can be used for replacing patient, and there are bones
The shin bone or astragalus of defect, without by patient health bone portion replace simultaneously, so as to avoid in the prior art because
The displacement of full ankle prosthesis and the problem of the unnecessary injury caused by the bone of the health of patient.
2) it is formed with anti-back screw assembly 3 on the tibial prosthesis 1 or astragalus prosthese 2 of ankle prosthesis 100 of the invention,
In screw 32 the first linkage section 321 with diameter segment can quickly go deep into it is solid with the sclerotin of human body in the sclerotin of human body
Fixed, the second linkage section 322 with larger-diameter section can be by the three-dimensional porous structure sheaf 4 and nut 31 of its outer surface steadily
Be fixed together, which not only increases the fixed effect between screw 32 and nut 31, also make the second linkage section 322 with
The bone tissue of human body can be merged preferably, to effectively raise the stability of the fixation of corresponding prosthese, ensure that vacation
The initial stage Bone Ingrowth of body and medium-term and long-term stability；
3) present invention is by the way that nut 31 and corresponding prosthese to be integrally formed, and screw 32 is with the cooperated with nut 31
Two linkage sections 322, even if shearing force that patient can be subject to by screw 32 in active procedure and the intracorporal electrochemical corrosion of people
Double action and fracture, i.e., fracture in the junction of the first linkage section 321 and the second linkage section 322, screw 32
Second linkage section 322 can be still us shown firmly attached in nut 31, to not only further ensure that consolidating for corresponding prosthese
Fixed stability will not also make the second linkage section 322 to fracture be formed as metallic foreign body, and cause to damage to patient.At one
It is preferably carried out in mode, it as shown in connection with fig. 3, can also shape on the inner surface 311 of nut 31 matched with the second linkage section 322
At there is three-dimensional porous structure sheaf 4.Pass through the setting, on the one hand, can be conducive to increase the table that nut 31 is matched with screw 32
The frictional force in face, so as to effectively improve the bonding strength of nut 31 Yu screw 32, to avoid the abjection of screw 32；It is another
Aspect, the three-dimensional porous structure sheaf 4 being formed on the internal perisporium of nut 31 can also make after connecting with the second linkage section 322
Bone tissue realizes differentiation, regeneration by the hole of the three-dimensional porous structure sheaf 4 of junction, to make the company of nut 31 and screw 32
Meeting place can merge with bone tissue, and then the bonding strength that both can preferably improve, and greatly reduce between the two micro-
It is dynamic, be conducive to the fixed stability of prosthese.
It in a preferred embodiment, can also on the outer surface of the first linkage section 321 and/or the outer surface of nut 31
It is formed with three-dimensional porous structure sheaf 4.In conjunction with shown in Fig. 3 and Fig. 5, can the first linkage section 321 outer surface and nut 31 it is outer
Peripheral wall has been respectively formed on three-dimensional porous structure sheaf 4.By the setting, outer surface and the nut 31 of the first linkage section 321 can be made
Periphery wall has been provided with the ability that better Bone Ingrowth and bone are creeped, i.e. the first linkage section 321 has after extending in sclerotin
The contact area bigger with body bone tissue, enables bone tissue quickly to grow into porous structure.In this way it can be ensured that the
The bonding strength of one linkage section 321 and sclerotin.And the three-dimensional porous structure sheaf 4 formed on the periphery wall of nut 31 can make bone group
The surface of nut 31 can be completely covered in the outside for being woven in corresponding prosthese so that nut 31 also can preferably with human body
Bone tissue fusion further increase the fixed stabilization of prosthese to further increase the strength and stability of the fixation of nut 31
Property.
In a preferred embodiment, it is formed in the three-dimensional porous structure sheaf 4 of the outer surface of the second linkage section 322
Thickness is smaller than the thickness for being equal to the three-dimensional porous structure sheaf 4 for the outer surface for being formed in the first linkage section 321, is formed in nut 31
On the thickness of three-dimensional porous structure sheaf 4 can be greater than the three-dimensional porous structure sheaf 4 for being formed in the outer surface of first linkage section 321
Thickness.By the setting, the ability that the bone of the outer surface of anti-back screw assembly 3 can be made to creep is successively from the second linkage section 322
The outer surface of outer surface, the outer surface of the first linkage section 321 and nut 31 gradually increases, so that the equal energy in the surface of three
Enough with the covering of better bone tissue, to enhance the strength and stability of its fixed fae body.
Preferably, the thickness range for being formed in the three-dimensional porous structure sheaf 4 of the outer surface of the first linkage section 321 can be 1mm
To 2mm；The thickness range for being formed in the three-dimensional porous structure sheaf 4 of the outer surface of the second linkage section 322 is 0.5mm to 1mm；It is formed
The thickness range of three-dimensional porous structure sheaf 4 on nut 31 is 4mm to 10mm.
In a preferred embodiment, the internal diameter of nut 31 can be the size of the outer diameter of the second linkage section 322
90% to 95%.By the setting, so that the second linkage section 322 of screw 32 during screwing in nut 31, passes through
Three-dimensional porous structure sheaf 4 on the outer surface of two linkage sections 322 and/or the three-dimensional porous structure sheaf 4 on the inner surface of nut 31
Abrasion, the cooperation that both can make is closer, to improve the bonding strength of screw 32 Yu nut 31.
Preferably, nut 31 processing when can first by the hole processing in it be through-hole 312 (as shown in Figure 4) again into
Row tapping process.Wherein, the diameter range of through-hole 312 may be configured as 3.3mm to 6.2mm, and preferably 3.3~3.7mm, 4.3~
4.7mm, 5~5.4mm, 5.8~6.2mm.Through-hole 312 after processing is completed, carries out 1~6 time to it using mach screw and attacks
The specific number of silk, tapping can screw out torque according to the cooperation of specific Floor screw 32 and nut 31 to determine.Pass through the setting, energy
Guarantee the intensity of the threaded connection of nut 31 and screw 32 and the back-out torque of screw 32, enough so as to effectively improve two
The stability of person's connection, and then improve the fixed effect of corresponding prosthese.
Preferably, the processing method of nut 31 may be, for example: when the diameter of the through-hole 312 of nut 31 is 5.1mm, axial length
For 10mm, the porosity of the three-dimensional porous structure sheaf 4 on the surface of nut 31 is 70%, when pore diameter is 300 μm, using machine plus
The 1-6 times back-out torque when the screw of work carries out tapping to the through-hole of nut 31 may respectively be 2.17N.m, 1.7N.m,
1.16N.m、0.77N.m、0.6N.m、0.58N.m。
In preferred embodiment as shown in Figure 5, the second linkage section 322 may include being connected with the first linkage section 321
Thread segment 323 and the head of a nail section 324 being coaxially connected with thread segment 323.Wherein, nut 31 is threadedly coupled with thread segment 323, and spiral shell
Three-dimensional porous structure sheaf 4 is formed on the surface opposite with head of a nail section 324 of mother 31.By the setting, revolved completely in screw 32
Enter to after in sclerotin with the corresponding prosthese of fixation, the surface opposite with head of a nail section 324 of nut 31 and the bottom surface of head of a nail section 324
325 fit together (as shown in connection with fig. 5), and the setting of the three-dimensional porous structure sheaf 4 on the surface is capable of increasing nut 31 and nail
Frictional force between cap section 324 so as to effectively hinder screw 32 to reversely rotate, and then avoids the de- of screw 32
Out.
Fig. 1 and Fig. 2 are returned to, in preferred embodiment as shown in the figure, the first end 12 of tibial prosthesis 1 and/or
Can be formed on the periphery wall of two ends 14 on the outer surface of three-dimensional porous structure sheaf 4 or body of talus prosthese 24 can be formed with it is vertical
Body porous structure layer 4.By the setting, usually when replacing corresponding prosthese, there are a large amount of bones to lack after the processing of patient's osteotomy
Damage, the present invention is formed with three-dimensional porous structure sheaf 4 by the outer surface in prosthese, so that the outer surface of prosthese is formed as porous knot
Structure, so which give the abilities that better Bone Ingrowth and bone are creeped, to improve the fixed stabilization of ankle prosthesis 100
Property.In addition, the weight of ankle prosthesis 100 can be effectively reduced in the setting of three-dimensional porous structure sheaf 4, soft group of reconstruction is additionally aided
The attachment point with muscle is knitted, so as to which patient's postoperative recovery time is effectively reduced, and it is postoperative to significantly improve patient
Recovery effects.
According to the present invention, three-dimensional porous structure sheaf 4 may include that a plurality of string diameter and being crossed-over by a plurality of string diameter is formed
Multiple holes, each hole can be interconnected, wherein be formed in each hole on anti-back screw assembly 3 three-dimensional porous structure sheaf 4
The range of the diameter of gap can be 200 μm to 800 μm, and the range of the porosity of three-dimensional porous structure sheaf 4 can be 30% to 80%；
It is formed on the first end 12 of tibial prosthesis 1 and/or the periphery wall of the second end 14, or is formed in the outer of body of talus prosthese 24
The range of the diameter of each hole can be 100 μm to 600 μm in three-dimensional porous structure sheaf 4 on surface, and three-dimensional porous structure sheaf 4
Porosity range can be 50% to 90%.
It is interconnected by the way that each hole formed will be crossed-over by string diameter, and the diameter of each hole is constructed
It is inconsistent, and the range of the diameter and porosity to the hole of three-dimensional porous structure 4 is specifically arranged, so that three-dimensional porous knot
The structure of structure layer 4 and the trabecular bone structure of human body more closely, porosity with higher and connectivity three-dimensional porous structure
Layer 4 can be good at inducing Bone Ingrowth, and the sclerotin of such human body can grow into rapid and natural the hole of three-dimensional porous structure sheaf 4
In, to improve the ability of the adherency of osteoblast, increment, differentiation, growing into and creeping for bone tissue is effectively promoted, into
And be conducive to ankle prosthesis 100 after surgery with the bone tissue rapid fusion of human body and fixation, therefore effectively improve patient
Postoperative recovery effects.
In preferred embodiment as shown in Figure 1, first end 12 may include for being inserted into the pulp cavity 111 of shin bone 11
Inserting paragraph 121 and be connected with inserting paragraph 121 and for the connecting section 122 that is abutted with the end face of shin bone 11, be formed in inserting paragraph
The diameter of each hole in three-dimensional porous structure sheaf 4 on 121 can be more than or equal to the three-dimensional porous knot being formed on connecting section 122
The diameter of each hole in structure layer 4, the diameter for being formed in each hole in the three-dimensional porous structure sheaf 4 on connecting section 122 can be with
The diameter for being formed in each hole in the three-dimensional porous structure sheaf 4 on the periphery wall of the second end 14 is equal.By the setting, insert
Entering section 121 may extend into the pulp cavity 111 of shin bone 11 so as to its subsequent rapid fusion with the bone tissue in pulp cavity 111, lead to
The end face for crossing connecting section 122 and shin bone 11 abuts against the stability that can effectively ensure that first end 12 and shin bone 11 are fixed.And by
Smaller in the diameter of the hole of three-dimensional porous structure sheaf 4, the ability that the bone on surface is creeped is stronger；The diameter of hole is bigger, table
The ability of the Bone Ingrowth in face is stronger.Pass through the setting as a result, additionally it is possible to so that inserting paragraph 121 has compared with connecting section 122
There is the ability of better Bone Ingrowth, while connecting section 122 being made compared with inserting paragraph 121 to there is better bone to creep ability, from
And bone tissue can be accelerated in the growth on the surface of first end 12, and then promote the faster rehabilitation of patient.
Preferably, the range of the diameter for each hole in three-dimensional porous structure sheaf 4 being formed in inserting paragraph 121 can be
200 μm to 400 μm, the range for being formed in the diameter of each hole in the three-dimensional porous structure sheaf 4 on connecting section 122 can be 100 μ
M to 200 μm.
In a preferred embodiment, it is formed in the thickness of the three-dimensional porous structure sheaf 4 in inserting paragraph 121, formed
The thickness of three-dimensional porous structure sheaf 4 and the three-dimensional porous knot being formed on the periphery wall of the second end 14 on connecting section 122
The thickness of structure layer 4 can be identical, and thickness range can be 1mm to 3mm.Preferably 2mm.By being formed in inserting paragraph 121, connecting section
122 and the second end 14 surface same thickness three-dimensional porous structure sheaf 4, on the one hand make tibial prosthesis 1 have it is more sharp
In the outer surface that Bone Ingrowth and bone are creeped, on the other hand also make tibial prosthesis 1 that there is preferably carrying, conduction and dispersive stress
The ability of load, so that ankle prosthesis 100 of the invention be made to obtain more stable using effect.
Certainly, be formed in inserting paragraph 121, connecting section 122 and the second end 14 surface three-dimensional porous structure sheaf 4
Thickness can also be different, and the difference for the patient being applicable according to tibial prosthesis 1 can be designed specifically, such as work as patient body
When heavier, in order to guarantee the intensity of tibial prosthesis 1, the thickness of the three-dimensional porous structure sheaf 4 of the outer surface of connecting section 122 can be set
The three-dimensional porous structure sheaf 4 for the outer surface compared to inserting paragraph 121 set it is thinner, and when the bone of patient itself is creeped energy
When power is poor, in order to guarantee tibial prosthesis 1 fixation stability, can be by the three-dimensional porous structure of the outer surface of connecting section 122
The thickness of the three-dimensional porous structure sheaf 4 of the outer surface compared to inserting paragraph 121 of the thickness setting of layer 4 is thicker.
In a preferred embodiment, the three-dimensional porous structure sheaf 4 being formed on the outer surface of body of talus prosthese 24
Thickness range can be 1mm to 3mm.Preferably 2mm.By the setting, so that astragalus prosthese 2, which equally has, is more conducive to Bone Ingrowth
The outer surface creeped with bone, while also making the equally energy with preferably carrying, conduction and dispersive stress load of astragalus prosthese 2
Power, which is not described herein again.
In preferred embodiment as shown in Figure 2, astragalus pad prosthese 22 the surface opposite with body of talus prosthese 24 and
It may be provided with card slot (not shown) on one of both surfaces opposite with astragalus pad prosthese 22 of body of talus prosthese 24,
It may be provided with the card prominent 221 with card slot cooperation in another one.Since astragalus pad prosthese 22 is slidably connected with shin bone 21, so that astragalus
The material for padding prosthese 22 is different from the material of body of talus prosthese 24.It, can when installing astragalus pad prosthese 22 and body of talus prosthese 24
Card in prominent 221 push-in card slot, under the mated condition of card slot and card prominent 221, can be realized along the paper direction perpendicular to Fig. 2
Astragalus pad prosthese 22 is fixedly connected with body of talus prosthese 24.
In preferred embodiment as depicted in figs. 1 and 2, on the periphery wall of the second end 14, astragalus pad prosthese 22
Multiple suture holes 5 of corresponding prosthese can be formed through on side wall and on body of talus prosthese 24.When the ankle-joint of human body
Because sufferer needs to repair, or when experience tumour or comminuted fracture, tend to cause ankle-joint severe bone,
Serious bone defect is easy to cause the joint capsule of ankle to damage.By above-mentioned setting, soft tissue can be passed through multiple sutures
Hole 5 is sutured, to repair or rebuild damaged joint capsule, to be conducive to the post-operative recovery of patient.
Preferably, the diameter range in suture hole 5 can be 2.5mm to 4mm；Further, suture hole 5 is specially along corresponding
The through-hole of the axial bending in hole, it can be 25mm to 40mm that this, which has the axial length range of the through-hole of curved radian,.The tool
The length value of body can suture the diameter of looper according to used in sewing process and suture the curved radian determination of looper, with
It is preferably sutured convenient for the operation and soft tissue of operation.
Preferably, three-dimensional porous structure sheaf 4 can be used metal powder and print to be formed by 3D technology, which can be with
It is titanium alloy, pure titanium or tantalum metal etc..Preferably, three-dimensional porous structure sheaf 4 is made of titanium alloy material, preferably by Ti6Al4V
It is made.It is further preferred that tibial prosthesis 1 and body of talus prosthese 24 also can be made of titanium alloy material.So that three-dimensional
Porous structure layer 4 can be integrally formed with tibial prosthesis 1 and body of talus prosthese 24, which not only makes tibial prosthesis 1 and astragalus
The processing of body prosthese 24 is more convenient, while also reducing the interaction force between each component, to make ankle-joint of the invention
The overall structure of prosthese 100 is more stable, and mechanical strength is more preferable.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme should all cover within the scope of the claims and the description of the invention.Especially, as long as there is no knots
Structure conflict, items technical characteristic mentioned in the various embodiments can be combined in any way.The present invention does not limit to
In specific embodiment disclosed herein, but include all technical solutions falling within the scope of the claims.
Claims (10)
1. a kind of ankle prosthesis characterized by comprising
Tibial prosthesis, the tibial prosthesis include the first end for being connected with shin bone, and for being slidably connected with astragalus
The second end is formed with anti-back screw assembly on the periphery wall of the second end；Or
Astragalus prosthese, the astragalus prosthese include that the astragalus for being slidably connected with shin bone pads prosthese and one end and the astragalus
Pad prosthese is fixedly connected, and the other end is used for the body of talus prosthese connecting with root bone fixation, is formed on the body of talus prosthese anti-
Screw assembly is moved back,
Wherein, the anti-back screw assembly include with the integrally formed nut of corresponding prosthese, and be used for and the nut cooperate
Screw, the screw include for passing through the nut and corresponding prosthese to enter the first linkage section of sclerotin, and with institute
The second linkage section that the first linkage section is coaxially connected and is used to be connected with nut is stated, the diameter of second linkage section is greater than described
The diameter of first linkage section, and at least three-dimensional porous structure sheaf is formed on the outer surface of second linkage section.
2. ankle prosthesis according to claim 1, which is characterized in that the nut matches with second linkage section
The three-dimensional porous structure sheaf is also formed on the inner surface of conjunction.
3. ankle prosthesis according to claim 2, which is characterized in that the outer surface of first linkage section and/or institute
It states and is also formed with the three-dimensional porous structure sheaf on the outer surface of nut.
4. ankle prosthesis according to claim 3, which is characterized in that be formed in the outer surface of second linkage section
The thickness of three-dimensional porous structure sheaf is less than or equal to be formed in the thickness of the three-dimensional porous structure sheaf of the outer surface of first linkage section
Degree, the thickness for the three-dimensional porous structure sheaf being formed on the nut are greater than the vertical of the outer surface for being formed in first linkage section
The thickness of body porous structure layer.
5. ankle prosthesis according to claim 4, which is characterized in that the internal diameter of the nut is second company
Connect the 90% to 95% of the size of the outer diameter of section.
6. ankle prosthesis according to any one of claim 1 to 5, which is characterized in that the first of the tibial prosthesis
The outer of the three-dimensional porous structure sheaf or the body of talus prosthese is formed on the periphery wall of end and/or the second end
The three-dimensional porous structure sheaf is formed on surface.
7. ankle prosthesis according to claim 6, which is characterized in that the three-dimensional porous structure sheaf includes a plurality of string diameter
Be crossed-over the multiple holes formed by a plurality of string diameter, each hole is interconnected, wherein is formed in the anti-back
The range of the diameter of each hole is 200 μm to 800 μm in three-dimensional porous structure sheaf on screw assembly, and the solid is more
The range of the porosity of pore structure layer is 30% to 80%；It is formed in the first end and/or described second of the tibial prosthesis
On the periphery wall of end, or each hole in the three-dimensional porous structure sheaf that is formed on the outer surface of the body of talus prosthese
The range of diameter is 100 μm to 600 μm, and the range of the porosity of the three-dimensional porous structure sheaf is 50% to 90%.
8. ankle prosthesis according to claim 7, which is characterized in that the first end includes for being inserted into shin bone
Inserting paragraph and connecting section connected and for abutting with the end face of shin bone with the inserting paragraph in pulp cavity, are formed in the insertion
The diameter of each hole in three-dimensional porous structure sheaf in section is more than or equal to the three-dimensional porous structure being formed on the connecting section
Layer in each hole diameter, the diameter for each hole in three-dimensional porous structure sheaf being formed on the connecting section be formed in
The diameter of each hole in three-dimensional porous structure sheaf on the periphery wall of the second end is equal.
9. ankle prosthesis according to claim 7, which is characterized in that be formed on the outer surface of the body of talus prosthese
Three-dimensional porous structure sheaf thickness range be 2mm to 4mm.
10. ankle prosthesis according to claim 6, which is characterized in that on the periphery wall of the second end, it is described away from
On the side wall of bone pad prosthese and the body of talus prosthese is respectively formed on through multiple suture holes of corresponding prosthese.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459580.3A CN110192936A (en) | 2019-05-29 | 2019-05-29 | Ankle prosthesis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910459580.3A CN110192936A (en) | 2019-05-29 | 2019-05-29 | Ankle prosthesis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110192936A true CN110192936A (en) | 2019-09-03 |
Family
ID=67753324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910459580.3A Pending CN110192936A (en) | 2019-05-29 | 2019-05-29 | Ankle prosthesis |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111658237A (en) * | 2020-06-28 | 2020-09-15 | 中国人民解放军空军军医大学 | Titanium alloy half-pelvic prosthesis for 3D printing of individualized retained part acetabulum |
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