CN102379735A

CN102379735A - Miniature condyle bone cutting device

Info

Publication number: CN102379735A
Application number: CN2010102677691A
Authority: CN
Inventors: 周袭明
Original assignee: Beijing Montagne Medical Device Co Ltd
Current assignee: Beijing Montagne Medical Device Co Ltd
Priority date: 2010-08-31
Filing date: 2010-08-31
Publication date: 2012-03-21
Anticipated expiration: 2030-08-31
Also published as: CN102379735B

Abstract

A miniature condyle bone cutting device comprises a driving shaft (2), a gearbox (3), a positioning rod (4), a front condyle bone cutting knife (5), two distal bone cutting knives (6 and 7) and two rear condyle bone cutting knives (8 and 9). The driving shaft (2) is a power input shaft, power is transmitted to the front condyle bone cutting knife (5) via the gearbox (3), the two distal bone cutting knives (6 and 7) and the two rear condyle bone cutting knives (8 and 9) via the gearbox (3), and the positioning rod (4) is located at the front end of the gearbox (3). The miniature condyle bone cutting device breaks through a traditional design concept of knee joint bone cutting, traditional five-surface bone cutting is omitted, surgical instruments for total knee joints and the design of a knee joint prosthesis are more adaptive small-incision minimally invasive replacement technology, vertical bone cutting can be carried out from a distal femur of a human body to a proximal femur of the human body, due to the vertical bone cutting, exposure area can be greatly reduced, a surgical incision is reduced, surgical time is shortened, and sufferings of patients are relieved.

Description

The deep device of little condyle

Technical field

The present invention relates to a kind of knee joint Minimally Invasive Surgery apparatus, particularly condyle of femur cutting apparatus.

Background technology

At present,, when perhaps prosthese being installed, must carry out the deep processing of shaping, make it have specific shape condyle of femur at the knee joint place if patient need replace knee joint, so as with the prosthese that will use cooperate installation.In the prior art; Usually need in operation, knee joint all be come out; Again to condyle of femur far-end, preartis, postartis, preceding tiltedly, five faces that retread cut respectively; Come out because these five faces are divided into five cuttings,, influence the operation quality and waste operating time so the relative positional accuracy of five faces is very difficult identical consistent with the prosthese size dimension that matches with it.For addressing this problem Chinese invention patent: title: femur formation and cutting device, the patent No.: 200510086667.9 and United States Patent (USP): title: femur formation and cutting center, the patent No.: five of can once accomplish condyle of femur of disclosed a kind of apparatus that femur is cut of being used in 7641662, this apparatus are deep; Improved deep precision, reduced operating time, though disclosed apparatus can once be accomplished condyle of femur in these two patents five are deep; But, deeply remain traditional five, because laterally walking about needing when deep; Therefore; Operation needs otch big, and knee joint exposes many, and the deep power that needs is also big.Since coming out from artificial full knee joint transposing technology, for condyle of femur deep be still so far five deep, therefore, the inboard design of knee-joint prosthesis is five faces always, causes the design of knee-joint prosthesis to be difficult to miniaturization.The little otch of complete knee joint Wicresoft replacement technique is the popular topic of comparison in recent years, has begun abroad to use.Little otch artificial full knee joint transposing technology has the minimizing soft-tissue trauma, reduces advantages such as hemorrhage, minimizing pain, quickening rehabilitation speed.Along with the raising of total knee replacement technology, the operating theater instruments of complete knee joint and the design of knee-joint prosthesis should adapt to the needs that little otch Wicresoft replacement technique develops.

Summary of the invention

For remedying the deficiency of five deep existence in the prior art; For misery and the operation risk that reduces the patient; The invention provides a kind of deep traditional design theory of knee joint of having broken, it is deep to avoid five of tradition, and the operating theater instruments that makes complete knee joint and knee-joint prosthesis design more adapt to the deep apparatus of femur of little otch Wicresoft replacement technique: the deep device of a kind of little condyle; Comprise driving shaft, gear-box, locating rod, the deep cutter of preartis, two deep cuttves of far-end and two deep cuttves of postartis; Said driving shaft is a power input shaft, and gives the deep cutter of said preartis through gear-box with transmission of power, two deep cuttves of far-end and two deep cuttves of postartis, and said locating rod is positioned at the front end of gear-box.

Further, the deep cutter direction of rotation of said two far-ends is opposite.

Further, the direction of rotation of said two deep cuttves of postartis is opposite.

Further, the front end of said driving shaft is positioned at said gear-box, and driving shaft is provided with driving gear; Also be provided with in the gear-box: use gear shaft for two first and use gear with two first that are provided with above that; Use gear shaft for two second and use gear with two second that are provided with above that; Use gear shaft for two the 3rd and use gear with two the 3rd that are provided with above that; The deep cutter shaft of preartis is taken turns with the deep cutter tooth of preartis that is provided with above that; The deep cutter tooth wheel of two postartis on the deep cutter tooth wheel of two far-ends on two deep cutter shafts of far-end, two deep cutter shafts of postartis; Above-mentioned each axle all is supported on the gear-box; The deep cutter shaft of said preartis, two deep cutter shafts of far-end and two deep cutter shafts of postartis stretch out by the front end of said gear-box; The deep cutter of preartis, two deep cuttves of far-end and two deep cuttves of postartis are separately positioned on the external part that the deep cutter shaft of preartis, two deep cutter shafts of far-end and two deep cutter shafts of postartis stretch out forward by gear-box.

Further, said driving gear is used gear and is meshed with two first, drives first and uses gear and rotate; First uses gear and second uses gear and is meshed, and drives second and uses gear and rotate; Second uses gear is meshed with the deep cutter tooth wheel of preartis, drives the rotation of the deep cutter shaft of preartis; Second uses gear, is meshed with the deep cutter tooth wheel of far-end, drives the deep cutter shaft of far-end and rotates; Another first is used the deep cutter tooth wheel of gear and another far-end and is meshed, and drives the deep cutter shaft of another far-end and rotates; The 3rd uses gear is meshed with the deep cutter tooth wheel of far-end; And be meshed with the deep cutter tooth wheel of postartis; And give the deep cutter shaft of postartis with the transmission of power of the deep cutter shaft of far-end; Another the 3rd is used the deep cutter tooth wheel of gear and another far-end and is meshed, and drives the rotation of the deep cutter shaft of another postartis through being meshed with the deep cutter tooth wheel of another postartis.

Further, said driving shaft rear end is a cross-axis head, and by stretching out backward in the said gear-box, and constitutes the power quick connector with the power sub that is arranged on said gear-box rear end; Realize with power input device between fast inserting be connected.

Further, also comprise in the gear-box the deep cutter shaft of another preartis and above that the deep cutter tooth wheel of another preartis is set, be used to be connected the deep cutter tooth wheel of preartis and second use the 4th of gear use gear shaft and be provided with above that the 4th use gear; Use gear through the said the 4th and use gear to the deep cutter transferring power of said preartis by second; The 4th uses gear shaft and the deep cutter shaft of preartis all is supported in the gear-box; The deep cutter of another preartis is arranged on the deep cutter shaft of preartis by external part in the gear-box, and the direction of rotation of two deep cuttves of preartis is opposite.

Further, said each deep cutter and deep cutter shaft thereof are structure as a whole.

Further, said each deep cutter is two-edged or multiple-cutting-edge circular knife.

Further, between said each deep cutter and the quantity of using gear that is provided with between each deep cutter and the driving shaft should according to each deep cutter direction of rotation and satisfy driving shaft and deep cutter between and set arbitrarily under the condition of distance between each deep cutter.

Use the deep device of little condyle that is provided among the present invention to break the deep traditional design theory of knee joint; Five cuttings of tradition have been avoided; Can be vertically deep near end of thighbone at the human femur under loading far-end, can significantly reduce exposure because employing is vertically deep, dwindle operative incision; Owing to be employed in the femur preartis and postartis is cut into half slot; Be cut into circular arc at DF; On circular arc, get out the Bao Youxiao again that design that the step blind hole can make the condyle of femur prosthese becomes, the operating theater instruments that makes complete knee joint and knee-joint prosthesis design more adapt to little otch Wicresoft replacement technique.In addition the deep device of little condyle among the present invention also has following advantage: the first, can reduce the deep amount of operation; The second, can under the condition that guarantees condyle of femur prosthese intensity, alleviate the weight (thickness) of condyle of femur prosthese; The 3rd, increased condyle of femur prosthese mounting stability; The 4th, the birth of the deep device of little condyle and application will change inboard five the planar design concepts of traditional condyle of femur prosthese, and the condyle of femur prosthese that will be born supporting with it simultaneously is a brand-new little condyle prosthese; The 5th, owing to broken the deep traditional design theory of knee joint, avoid five cuttings of tradition, therefore, cutting precision is high, and required deep power is little, and has shortened operating time, alleviates the patient suffering.

Description of drawings

Fig. 1 is the deep device assembling of a little condyle sketch map;

Fig. 2 is the deep device gear drive of a little condyle sketch map among the embodiment 1;

Fig. 3 is the deep device gear drive of a little condyle sketch map among the embodiment 2.

The specific embodiment

Like Fig. 1, shown in 2, the deep device of little condyle among the present invention comprises power sub 1, driving shaft 2, gear-box 3, locating rod 4, the deep cutter 8,9 of 6,7 and two postartis of the deep cutter of 5, two far-ends of the deep cutter of preartis.Setting power sub 1 part is the rear end of the deep device of little condyle.Driving shaft 2 is a power input shaft; The front end of driving shaft 2 and the driving gear 21 that is arranged on its front end thereof are arranged in the gear-box 3; Its rear end is that cross-axis head 26 is stretched out by gear-box backward, is positioned to be arranged on gear-box 3 rear end power subs 1, constitutes the power quick connector with power sub 1.Realize with power input device between fast inserting be connected.In the gear-box 3 except the front end that is provided with driving shaft 2 be provided with the driving gear 21 on it; Also be provided with: use gear shaft and two of being separately positioned on it use

gear

22a, 22b for two first, use gear shaft for two second and use

gear

23a, 23b on it with being separately positioned on; A deep cutter shaft 510 of preartis and the deep cutter tooth of preartis that is provided with above that take turns 51; Two deep cutter shafts 610,710 of far-end and the deep cutter tooth of two far-ends that is separately positioned on it take

turns

61,71; Use gear shaft and two the 3rd of being separately positioned on it use

gear

24a, 24b for two the 3rd, two deep cutter shafts 810,910 of postartis and be separately positioned on the deep

cutter tooth wheel

81,91 of two postartis on it.Above-mentioned each axle all is supported on the gear-box.

Driving gear 21 is used gear 22a with two first, 22b is meshed, and drives two first and uses

gear

22a, 22b rotation; First uses that gear 22a uses gear 23a with two second, 23b is meshed, and drives two

second gear

23a, 23b rotates; Second uses gear 23a is meshed with the deep gear 51 of preartis, drives the rotation of the deep axle 510 of preartis.Second uses gear 23b, is meshed with the deep cutter tooth wheel 61 of far-end, drives the deep cutter shaft 610 of far-end and rotates.Another first is used the deep cutter tooth wheel 71 of gear 22b and another far-end and is meshed, and drives the deep cutter shaft 710 of another far-end and rotates.The 3rd uses gear 24a is meshed with deep cutter tooth wheel 61 of far-end and the deep cutter tooth wheel 81 of postartis; Give the deep cutter shaft 810 of postartis with the transmission of power of the deep cutter shaft 610 of far-end; Another the 3rd is used the deep cutter tooth wheel 62 of gear 24b and another far-end and is meshed with the deep cutter tooth wheel 91 of another postartis, and gives the deep cutter shaft 910 of postartis with the transmission of power of the deep cutter tooth wheel 620 of far-end.

The deep cutter shaft of the deep cutter shaft of preartis 510, two 610,710 and two postartis of the deep cutter shaft of far-end 810,910 stretches out by the gear-box front end.The deep cutter of preartis 5, two deep cuttves 8,9 of 6,7 and two postartis of the deep cutter of far-end are separately positioned on the external part that the deep cutter shaft of preartis 510, two deep cutter shafts 810,910 of 610,710 and two postartis of the deep cutter shaft of far-end stretch out forward by gear-box.

Locating rod 4 is arranged on the front end of gear-box, and stretches out forward.It act as and inserts location in the preceding hole 12 of marrow.

During use; Locating rod 4 is inserted in the preceding hole of marrow; Confirm the deep device of little condyle and the relative position between the bone that will cut; Power input device is the deep device input of a little condyle power through the quick connector that is arranged on the deep device of little condyle rear end; Driving driving shaft 2 rotates; Driving shaft 2 through be provided with above that driving shaft gear 21 drive two

first use gear

22a, 22b rotates, and uses the engagement that

gear

22a, 22b and second use the deep

cutter tooth wheel

61,71 of

gear

23a, 23b and far-end through first and drives the deep cutter 5 of preartis and two deep cuttves 6,7 rotations of far-end, two

deep gears

61,71 of far-end drive two the 3rd respectively and use

gear

24a, 24b rotation; And drive respectively and rotate, and then drive two deep cutter shafts 810,910 of postartis and the deep cutter 8,9 of two postartis that is provided with above that rotates with two the 3rd deep

cutters tooth wheels

81,91 of two postartis of using

gear

24a, 24b engagement.So after power was input to the deep device of little condyle by driving shaft 2, five rotated deep cutter simultaneously, simultaneously condyle of femur are cut.For counter balance torque, the rotation direction of two deep cuttves 6,7 of far-end is opposite among the present invention, and the rotation direction of two deep cuttves 8,9 of postartis also is opposite.The moment of torsion that such design can make deep cutter in rotary course, produced is cancelled out each other, and has alleviated operator's manipulation force, makes to operate portable and stable more, reduces the injury to bone simultaneously.

Embodiment 2

As shown in Figure 3, the difference between the structure of the deep device of little condyle among the embodiment 2 and the deep device structure of the little condyle in embodiment 1 is: increased a deep cutter 10 of preartis on the deep device architecture basics of the little condyle in embodiment 1.And in gear-box 3 corresponding deep cutter shaft 110 of preartis and the deep cutter tooth wheel 11 of preartis that is provided with above that of having increased; Be used to be connected the deep cutter tooth wheel 11 and second of preartis use gear 23a the 4th use gear 25 and gear shaft thereof: the 4th uses gear shaft.The deep cutter 10 of preartis is arranged on the deep cutter shaft 110 of preartis by the front end that stretches out in the gear-box 3.The deep cutter tooth wheel 11 and the 4th of preartis is used gear 25 and is meshed, and the 4th uses gear shaft is supported in the gear-box 3.The 4th uses gear 25 also uses gear 22b and is meshed with second.Second use gear 22b rotation drive the 4th and use gear 25 and rotate, and then drive the deep cutter 10 of preartis and rotate.The direction of rotation of two deep cuttves 5,10 of preartis also is opposite.

The opposite design of each deep cutter direction of rotation among above-mentioned two embodiment, the moment of torsion that deep cutter is produced in rotary course is cancelled out each other, and has alleviated operator's manipulation force, makes to operate portable and stable more, reduces the injury to bone simultaneously.

Deep cutter and deep cutter shaft thereof among above-mentioned two embodiment can be made of one or divide body structure, and two deep cuttves of far-end can be selected staircase structural model or wheel chair access other structures, and all deep cuttves all can be selected two-edged or multiple-cutting-edge circular knife for use.

What particularly point out in addition is that each effect of using gear is between direction of rotation, adjustment driving shaft and each the deep cutter of adjusting each deep cutter and the distance between each deep cutter among above-mentioned two embodiment.The quantity of using gear of using between gear quantity and the deep cutter between driving shaft and the deep cutter can increase or reduce according to actual needs, make between direction of rotation and the deep cutter of each deep cutter apart from practical requirement.

Protection scope of the present invention is not limited to the above embodiments.According to any distortion that the specific embodiment of the present invention is made, all do not break away from the scope of spirit of the present invention and claim record.

Claims

1. the deep device of little condyle is characterized by: comprise driving shaft (2), gear-box (3), locating rod (4), a deep cutter of preartis (5), two deep cuttves of far-end (6,7) and two deep cuttves of postartis (8,9); Said driving shaft (2) is a power input shaft, and gives the deep cutter of said preartis (5) through gear-box (3) with transmission of power, two deep cuttves of far-end (6,7) and two deep cuttves of postartis (8,9), and said locating rod (4) is positioned at the front end of gear-box (3).

2. according to the deep device of the said little condyle of claim 1, it is characterized by: said two deep cuttves of far-end (6,7) direction of rotation is opposite.

3. according to claim 1 or the deep device of 2 said little condyles, it is characterized by: the direction of rotation of said two deep cuttves of postartis (8,9) is also opposite.

4. according to the deep device of the said little condyle of claim 1, it is characterized by: the front end of said driving shaft (2) is positioned at said gear-box (3), and driving shaft (2) is provided with driving gear (21); Gear-box also is provided with in (3): use gear shaft for two first and use gear (22a, 22b) with two first that are separately positioned on it; Use gear shaft for two second and use gear (23a, 23b) with two second that are separately positioned on it; Use gear shaft for two the 3rd and use gear (24a, 24b) with two the 3rd that are separately positioned on it; A deep cutter shaft of preartis (510) and the deep cutter tooth of preartis that is provided with are above that taken turns (51); The deep cutter tooth wheels of two far-ends on two deep cutter shafts of far-end (610,710) (61,71), the deep cutter tooth wheels of two postartis on two deep cutter shafts of postartis (810,910) (81,91); Above-mentioned each axle all is supported on the gear-box (3); The deep cutter shaft of said preartis (510), two deep cutter shafts of far-end (610,710) and two deep cutter shafts of postartis (810,910) stretch out by the front end of said gear-box (3); The deep cutter of preartis (5), two deep cuttves of far-end (6,7) and two deep cuttves of postartis (8,9) are separately positioned on the external part that the deep cutter shaft of preartis (510), two deep cutter shafts of far-end (610,710) and two deep cutter shafts of postartis (810,910) stretch out forward by gear-box (3).

5. according to the deep device of the said little condyle of claim 4, it is characterized by: said driving gear (21) is used gear (22a, 22b) and is meshed with two first, drives first and uses gear and rotate; First uses gear (22a) and second uses gear (23a, 23b) and is meshed, and drives second gear and rotates; Second uses gear (23a) is meshed with the deep cutter tooth wheel of preartis (51), drives the rotation of the deep cutter shaft of preartis (510); Second uses gear (23b), is meshed with the deep cutter tooth wheel of far-end (61), drives the deep cutter shaft of far-end (610) and rotates; Another first is used the deep cutter tooth wheel of gear (22b) and another far-end (71) and is meshed, and drives the deep cutter shaft of another far-end (710) and rotates; The 3rd uses gear (24a) is meshed with the deep cutter tooth wheel of far-end (61); And be meshed with the deep cutter tooth wheel of postartis (81); And give the deep cutter shaft of postartis (810) with the transmission of power of the deep cutter shaft of far-end; Another the 3rd is used the deep cutter tooth wheel of gear (24b) and another far-end (62) and is meshed, and with drive the rotation of the deep cutter shaft of another postartis (910) through being meshed with the deep cutter tooth wheel of another postartis (91).

6. according to the deep device of little condyle described in the claim 1, it is characterized by: said driving shaft (2) rear end is a cross-axis head, and by stretching out backward in the said gear-box (3), and constitutes the power quick connector with the power sub (1) that is arranged on said gear-box (3) rear end; Realize with power input device between fast inserting be connected.

7. according to the deep device of little condyle described in the claim 1, it is characterized by: also comprise the deep cutter shaft of another preartis (110) in the gear-box (3) and above that the deep cutter tooth wheel of another preartis (11) is set, be used to be connected the deep cutter tooth wheel of preartis (11) and second use the 4th of gear use gear shaft and setting above that the 4th use gear (25); Use gear (25) through the said the 4th and use gear (23a) to the deep cutter of said preartis (11) transferring power by second; The 4th uses gear shaft and the deep cutter shaft of preartis (110) all is supported in the gear-box (3); The deep cutter of another preartis (10) is arranged on the deep cutter shaft of preartis (110) by external part in the gear-box (3), and the direction of rotation of said two deep cuttves of preartis (5,10) is opposite.

8. according to the deep device of little condyle described in above-mentioned arbitrary claim, it is characterized by: said each deep cutter and deep cutter shaft thereof are structure as a whole.

9. the deep device of little condyle described in claim 1, it is characterized by: said each deep cutter is two-edged or multiple-cutting-edge circular knife.

10. according to claim 4,5, the deep device of little condyle described in 7, it is characterized by: the quantity of using gear that is provided with between said each deep cutter and between each deep cutter and the driving shaft (2) should according to each deep cutter direction of rotation with satisfy between driving shaft (2) and the deep cutter and setting arbitrarily under the condition of distance between each deep cutter.