Background technology
The artificial joint replacement postoperative infection can cause complication, and treatment is difficulty very.Methods of treatment commonly used at present is to carry out second operation: artificial joint prosthesis is taken out in operation for the first time, and carries out debridement completely; Carry out second operation again after waiting for infection control then, implant new prosthese.After the debridement first time, the empty position that takes out prosthese should use other object occupy-places, otherwise periarticular soft tissues can contracture cause difficulty for the operation second time, also can influence the function in joint simultaneously.
Present occupying device adopts bone cement to make more, and this occupying device can provide the antibiotic of high concentration to the part.Make this occupying device and adopt the direct pressing mold of mould to produce more, concrete is exactly the die cavity of bone cement being put into counterdie, through the patrix bone cement in this die cavity that bears down on one, solidifies the back and forms occupying device again.For protecting from infection and reduce operating time, the making of occupying device need field fabrication in operating room, to keep gnotobasis.This just requires the making of occupying device to want convenient quick, in order to avoid delay operating time, increases patient's infection potential.But present occupying device mould is after taking off patrix, and occupying device is whole ccontaining and stick in the die cavity of counterdie, from die cavity, takes out very inconvenience of occupying device, has incured loss through delay operating time.In addition, in order to save time, the occupying device of being about to usually eager to excel in whatever one does takes out die cavity, and this just usually causes the occupying device surface to produce cut, and the occupying device surface scratch can influence the use of occupying device in human body, also possibly cause producing wound in the time of seriously, increases the weight of to infect.
Summary of the invention
To the problem that exists in the prior art, the object of the invention be provide a kind of simple in structure, to make and take out occupying device convenient and swift and can not influence the mould that is used to make the knee joint occupying device of occupying device surface quality.
For realizing above-mentioned purpose, technical scheme of the present invention is following:
A kind of mould that is used to make the knee joint occupying device; Comprise patrix and counterdie; Fasten between said patrix and the counterdie and form the closed cavity that conforms to the knee joint occupying device; Said counterdie comprises base and first die body that cooperatively interacts and second die body, and said second die body is fixedly installed on the said base, and said first die body is pivoted on the said base; Also pivot on the said base set lever is installed, said set lever includes said first die body is fixed the locking arm on said base.
Further, said set lever also includes the motion arm of the said locking arm of vertical connection.
Further, the cross section of said closed cavity is the U profile of asymmetric arc transition.
Further, the material of said patrix and counterdie is polytetrafluoroethylene (PTFE).
Further, the material of said patrix and counterdie is polyformaldehyde.
Beneficial effect of the present invention is; The present invention compared with prior art, first die body of counterdie is pivoted on the base among the present invention, first die body is pivoted to diverse location respectively when making the knee joint occupying device and taking out the knee joint occupying device; Both can close up and make the knee joint occupying device; Can open the preartis position that exposes the knee joint occupying device again, just can take out the knee joint occupying device easily, and adopt set lever to be rotated and to close up or to open first die body through this position that clamping exposes; Easy to operate, the doctor can operate in surgical procedure very easily.The present invention makes that not only knee joint occupying device knockout course is convenient and swift; Thereby also owing to when this position taking-up knee joint occupying device of clamping, can take safeguard measure can not scratch knee joint occupying device surface easily; Improve surface quality; Improve security and reliability that the knee joint occupying device uses in human body greatly, the occupying device mould that demould time of the present invention is compared present shortens to a great extent, thereby has shortened operating time effectively.
The specific embodiment
The exemplary embodiments that embodies characteristic of the present invention and advantage will be described in detail in following explanation.Be understood that the present invention can have various variations on various embodiment, its neither departing from the scope of the present invention, and explanation wherein and accompanying drawing be the usefulness of being used as explanation in itself, but not in order to restriction the present invention.
Like Fig. 1 and shown in Figure 2, the present invention includes patrix 1 and counterdie 2, patrix 1 can snap together with counterdie 2, forms a closed cavity jointly, and the geomery of this cavity conforms to knee joint occupying device 3.In this closed cavity, inject contain antibiotic bone cement and solidify after, promptly form knee joint occupying device 3.Knee joint occupying device 3 is made moulding under the gnotobasis in surgical procedure, and directly implants the position of taking out prosthese, takes out when treating second operation again.
Patrix 1 structure of the present invention is as shown in Figure 3; Integral body is the longitudinal extension structure; The straight-flanked ring 11 of cross section middle part for having arc transition, the limit on plane extends to form first flanging 12 to a side on this straight-flanked ring 11, and this straight-flanked ring 11 opposite sides middle part oppositely is extended with second flanging 13 with first flanging 12.The U profile of the asymmetric arc transition of the lower surface of straight-flanked ring 11 forms die pressing surface jointly between first flanging 12, second flanging 13 and first flanging 12 and second flanging 13; This die pressing surface forms airtight cavity with counterdie 2 die cavitys; And this die pressing surface is used for pressing the bone cement that places counterdie 2 die cavitys, so that compression moulding knee joint occupying device 3.The outside, second flanging, 13 two ends also is processed with the locating slot 14 of circular arc, so that patrix 1 carries out longitudinal register when fastening with counterdie 2.
Counterdie 2 structures of the present invention such as Fig. 4-shown in Figure 6 comprise first die body 21, second die body 22 and base 23.Wherein, first die body, 21 corresponding knee joint occupying devices, 3 preartis positions, second die body, 22 corresponding knee joint occupying devices, 3 other positions, base 23 is a supportive body.Second die body 22 is integrally formed with base 23, and base 23 bottom surfaces are the plane.First die body 21, second die body 22 and base 23 all adopt with the NA material of bone cement and make, and material wherein commonly used comprises polytetrafluoroethylene (PTFE) and polyformaldehyde, selects for use according to actual needs.First die body 21 is pivoted on the base 23 through rotating shaft.First die body 21 and second die body, 22 intrados all are processed with die cavity 24, the first die bodys 21 that are interconnected and the joint face between second die body 22 is the inclined-plane.The die cavity 24 and knee joint occupying device 3 physical dimensions that are communicated with match, and cooperate the airtight cavity that forms processing knee joint occupying device 3 with patrix 1.
First die body 21 is with after second die body 22 is connected, and the inboard is an asymmetrical U type structure, and the asymmetric U profile of the lower surface of the straight-flanked ring 11 between first flanging 12 and second flanging 13 matches.First die body 21 is a high side, and second die body 22 is a low side and bottom surface, arc transition between both sides and the bottom surface.Second die body, 22 1 sides are for connecting the inclined-plane of first die body 21, and two ends, opposite side upper surface are equipped with two reference columns 25, and this reference column 25 cooperates the location with locating slot 14 on the patrix 1.
First die body 21 is a high side in the asymmetric U type structure, corresponding knee joint occupying device 3 preartis positions.Through rotating shaft 263 pivots set lever 26 is installed near first die body, 21 bottom positions on the base 23,263 rotations around the shaft of this set lever 26, structure is as shown in Figure 7.First die body, 21 bottoms form rectangular channels 211 near side of set lever 26 and base 23, through 263 rotational lock handles 26 around the shaft, set lever 26 is got into or leave rectangular channel 211, thereby reach restriction or allow the purpose of first die body, 21 rotations.First die body, 21 bottoms are stretched into away from a side of set lever 26 to pivot in the space of base 23 and with base 23 and are connected, first die body 21 through this rotating shaft around base 23 rotations.
Set lever 26 is a L type structure; Comprise locking arm 261 and motion arm 262; Vertical each other between locking arm 261 and the motion arm 262; But in the rectangular channel 211 of locking arm 261 jam-packs between first die body 21 and base 23, thereby first die body 21 is fixed on the operating position of base 23 with second die body 22.Open first die body 21 if desired, through rotating operation arm 262, rectangular channel 211, the first die bodys 21 that make locking arm 261 produce between first die body 21 and the base 23 unclamp, and can easily outwards rotate, and open in 22 minutes with second die body.The height of set lever 26 makes first die body 21 and second die body 22 fit tightly along its joint face according to the height design of rectangular channel 211.This set lever 26 also can adopt the structure of pull to form; In base 23 respective side chute is set; Locking arm 261 is pressed into locking first die body 21 in the rectangular channel 211 along this chute, also can locking arm 261 be pulled out rectangular channel 211 through motion arm 262, thereby open first die body 21 easily.
When use is of the present invention; At first rotate first die body 21; Win die body 21 and second die body 22 are combined together; This moment, the rotation lock handle 26, locking arm 261 is filled in the rectangular channel 211 between first die body 21 and the base 23, thereby with second die body 22 with first die body, 21 positioning and lockings.In first die body 21 and groove 24 that second die body 22 is communicated with, inject then and contain antibiotic bone cement, the knee joint occupying device 3 that the dosage of bone cement is made according to need is confirmed.At last patrix 1 is fastened on the counterdie 2, reference column 25 and cooperating of locating slot 14 limiting the position, and apply certain pressure.After treating that bone cement solidifies, upwards mention patrix 1 earlier, the rotational lock handle 26 then; Locking arm 261 is produced the rectangular channel 211 between first die body 21 and the base 23; Outwards rotate first die body 21 again, the die body 21 of winning is launched, easily 3 demouldings of knee joint occupying device are taken out at last.
Beneficial effect of the present invention is; The present invention compared with prior art; First die body 21 of counterdie 2 is pivoted on the base 23 among the present invention, and first die body 21 is pivoted to diverse location respectively when making knee joint occupying device 3 and taking out knee joint occupying device 3, both can close up and make knee joint occupying device 3; Can open the preartis position that exposes knee joint occupying device 3 again; Knee joint occupying device 3 just can be taken out easily in this position through clamping exposes, and the present invention makes that not only knee joint occupying device 3 knockout courses are convenient and swift, thereby also owing to when this position taking-up knee joint occupying device 3 of clamping, can take safeguard measure can not scratch knee joint occupying device 3 surfaces easily; Improve surface quality, improve security and reliability that knee joint occupying device 3 uses greatly in human body.
Adopt set lever to make first die body 21 remain on matched moulds position or expanded position, simple to operate, the clamping systems such as adopting the screw connection of comparing, time saving and energy saving, and reliable.
The knee joint occupying device 3 that the present invention produces is as shown in Figure 8 with being used of human femur under loading 4; A is different osteotomy surface among the figure; Because knee joint occupying device 3 inboard asymmetric U type structures for the circular arc connection of the present invention can adapt to femur 4 instructions for uses of different osteotomy surfaces.When reality is used, knee joint occupying device 3 is installed in the DF of different osteotomy surfaces, fill bone cement in the gap between occupying device 3 and osteotomy surface again, just can realize abundant applying.This knee joint occupying device 3 can significantly reduce occupying device specification, model, only needs to make large, medium and small three kinds of products and just can satisfy the different human body demand, reduces cost of manufacture, improves make efficiency.
Technical scheme of the present invention is disclosed as above by preferred embodiment.Those skilled in the art should recognize change and the retouching of under the situation that does not break away from appended scope of the present invention that claim disclosed of the present invention and spirit, being done, and all belong within the protection domain of claim of the present invention.