CN1127325C - Compact external fixator - Google Patents
Compact external fixator Download PDFInfo
- Publication number
- CN1127325C CN1127325C CN 97111548 CN97111548A CN1127325C CN 1127325 C CN1127325 C CN 1127325C CN 97111548 CN97111548 CN 97111548 CN 97111548 A CN97111548 A CN 97111548A CN 1127325 C CN1127325 C CN 1127325C
- Authority
- CN
- China
- Prior art keywords
- mentioned
- external fixator
- fixator according
- scalable
- female part
- 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.)
- Expired - Lifetime
Links
- 210000000988 bone and bone Anatomy 0.000 claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 12
- 210000003793 centrosome Anatomy 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 230000013011 mating Effects 0.000 claims description 3
- 229920005992 thermoplastic resin Polymers 0.000 claims description 3
- 229910000838 Al alloy Inorganic materials 0.000 claims description 2
- 239000013078 crystal Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 229920006324 polyoxymethylene Polymers 0.000 claims description 2
- 230000000295 complement effect Effects 0.000 claims 1
- -1 polysulfonate Polymers 0.000 claims 1
- 208000010392 Bone Fractures Diseases 0.000 abstract description 27
- 206010017076 Fracture Diseases 0.000 description 23
- 238000000034 method Methods 0.000 description 4
- 230000012447 hatching Effects 0.000 description 3
- 210000000459 calcaneus Anatomy 0.000 description 2
- 210000003010 carpal bone Anatomy 0.000 description 2
- 210000003797 carpal joint Anatomy 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 206010048049 Wrist fracture Diseases 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 210000001906 first metatarsal bone Anatomy 0.000 description 1
- 239000007943 implant Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000001356 surgical procedure Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
Images
Abstract
A compact external fixation device for the treatment of small bone fractures of adult and bone fractures of children comprises a pair of clamps for bone screws connected by respective spherical joints (5, 6) and a central body formed by at least one male element (7) and one female element (8) which are telescopically coupled. The element (7) is made of a material of high radiotransparency and the other element (8) is made of a substantially radiopaque rigid material with walls of such minimum thickness as to be at least partially radiotransparent. Antirotation means are provided between the male telescopic element and the female telescopic element; transverse eccentric pins contained in each clamp act on respective slides for locking the ball of each joint. The fixation device permits complete radioscopy of the fracture even through the central body; the device is light in weight and of small dimensions, due to the provision of the means for locking the joints within the clamps.
Description
Technical field
The present invention is relevant with a kind of external fixator that can be used for the Orthopeadic Surgery field, especially for the outer reason of fracture of ossiculum, such as the fracture of first metatarsal bone, carpal bone, heel bone and child's general fracture.
Background technology
Known small-size shaft is to external fixator, to holder, in European patent No.11258 and United States Patent (USP) 4621627 detailed description all arranged as 30000 type external shafts of the applicant's production and selling.
These known holders generally have an elongated centrosome chuck then by can being connected on two vertical end at the pin or the bone bolt of the motionless spherojoint of certain orientation accordingly.
There is a spheroplast that becomes one with chuck or centrosome in each joint and is moved and this cam pin can rotate from the outside by a suitable tools by a locking sleeve that is promoted by cam pin.
Centrosome has two or more can moving mutually also can be fixed on the locational scalable component of wanting with suitable locking piece.
The form of said fixing device can produce various sizes, and one of them size is used for reducing and stable child's fracture and adult's the ossiculum fracture of carpal bone or heel bone for example.
But the shortcoming that this holder has some to generally acknowledge wherein should should be mentioned that the opacity of centrosome to X ray especially, and this shortcoming can hinder the X-ray procedure of the many sides outside the fracture in recovery or inspection afterwards.
Another shortcoming of known holder is that also its bulky because link stopper and Camlock device are placed between centrosome and the corresponding chuck, therefore increase the length of holder and the minimum range between the bone bolt, thereby just reduce the probability that centrosome is regulated.
The weight that to also have a shortcoming be conventional fixators is bigger than normal, especially wrist fractures treatment and child and old man's general fractures.
It is not fix as yet so that stump can be done limitedly when mobile when these retractable member that another shortcoming is arranged again, and the cylindrical shape retractable member may be reversed and quickens the new border of fracture and grow up around its longitudinal axis.
Summary of the invention
Main purpose of the present invention is from each viewpoint fracture to be carried out X-ray examination by a kind of permission, eliminates above-mentioned defective comprising passing the external fixator that holder carries out X-ray examination.
A further object of the invention is to provide a kind of vertically short and small especially so be suitable for treating adult's the fracture of ossiculum and the external fixator of the general fracture of child.
Another purpose is that a kind of characteristics will be provided is the quite little holder of weight.
Another purpose provides a kind of holder, and this holder fixedly has a reliable performance with regard to the torsion rigidity in joint and orientation.
For achieving the above object, by the invention provides a kind of so small-sized external fixator, be suitable for treatment adult fracture of ossiculum and child's fracture, it has a pair of chuck that is used for the bone bolt, these two chucks are linked on the length-adjustable centrosome by motionless spherojoint, this centrosome has a male part and a female part, and male part is connected with the female part telescopically, it is characterized in that: above-mentioned male part is by the material of X ray highly transparent is made; And above-mentioned female part is by basically the opaque material of X ray being constituted, and the sidewall wall thickness that this female part had is reduced to, and makes the sidewall can be at least to the X ray partially transparent.
So just can check fracture with X ray, comprise that the centrosome that passes holder checks, hinder or restriction so holder no longer constitutes the inspection of fracture from all points of observation.
The detailed description of external fixator more excellent rather than exclusive embodiment according to the present invention, more in conjunction with the accompanying drawings by the explanation of limiting examples, characteristics of the present invention and advantage can be more obvious.
Description of drawings
Fig. 1 illustrates the perspective view that is contained near the external fixator of the present invention of carpal joint;
The side view of holder in Fig. 2 presentation graphs 1 when complete retracted position;
The side view of holder in Fig. 3 presentation graphs 1 when complete extended position;
Fig. 4 represents the side view of first details in the above-mentioned figure of an axis vertical partly cut-away;
Fig. 5 represents the side view of second details in the above-mentioned figure of an axis vertical partly cut-away;
The transverse sectional view that detail section is got along the plane of VI-VI hatching in Fig. 6 presentation graphs 4;
Detail section in Fig. 7 presentation graphs 5, the transverse sectional view of getting along the plane of VII-VII hatching;
Detail section in Fig. 8 presentation graphs 5, the transverse sectional view of getting along the plane of VIII-VIII hatching;
The perspective view of chuck joint in Figure 10 presentation graphs 9;
Figure 11 represents the side view with the paired Fig. 1 holder of a tensioner;
Figure 12 represents the side view of independent tensioner among Figure 11;
Figure 13 represents the front view of tensioner among Figure 12;
The specific embodiment
With reference to above-mentioned accompanying drawing, an external shaft of the present invention is briefly represented with label 1 to holder, it has a pair of chuck 2,3 to be used for fastening quilt to expect that outward the doctor at first implants bolt or the pin V in for example carpal stump of fracture, and links on the center slender bodies 4 by corresponding end section header 5,6.
By roughly cylindrical and have a male part 7 and a female part 8 of circular cross section to constitute, male part 7 and female part 8 telescopicallies are cooperating centrosome respectively, thereby they can relatively slide along a common longitudinal axis L mutually and change the total length of centrosome 4.
Chuck 2,3 is preferably made by the corresponding principal part 9,10 that roughly is prism or parallelepiped shape, links on the corresponding plate 11,12 by spiral shell complete 13,14 fastening bone pin V.
According to the present invention, scalable component 7,8 sees outside the fracture the local transparent so that people of X ray at least, even sees through centrosome 4 and see fracture.
Preferably one of them extensible member, particularly male part 7 are to be made by X ray very material transparent.
The high transparent material of X ray can be to be selected from polyethers, polysulfonate, the thermoplastic resin of the noncrystal or semi-crystal structure of polyformaldehyde or polyetheramine ester.
Best, scalable female part be by roughly to the opaque material of X ray, aluminium alloy for example constitutes and sidewall has less thickness so that at least to the X ray partially transparent.
From calculating and test can find out that centrosome just has enough transparencys to X ray as a complete unit so if scalable female part 8 is no more than 1 millimeter sidewall by thickness S to be constituted.
In order to prevent relatively rotating of scalable component 7,8, therefore, when allowing holder to move, suitable anti-rotation device need be set also just in order to prevent relatively rotating of bone folder 2,3.
Particularly scalable male part 7 is close on whole length at it and is extending a facet 15 and staying next distal process 16.
With the reverse chuck 3 of free end on, be provided with the pleurapophysis 17 of partial screw threads hole in the female part 8 to hold horizontal screw 18, the fore-and-aft plane 15 1 of its smooth and male part 7 works to prevent that male part 7 from rotating around longitudinal axis L.
The main prismatic parts 9,10 that is noted that this two chuck 2,3 is provided with axially extending bore 20,21, and and spherojoint 24,25 interactional corresponding ball limiters 22,23, spherojoint is fixed on the corresponding scalable component 7,8 by lock screw 26,27.
Locking cylindrical block 28,29 places in the through hole 20,21 and has the hemisphere seat 30,31 of the joint 24,25 of firmly trapping the ball and have towards outer cylindrical radial seat 32,33 at the other end at the one end.
Laterally cam pin 34,35 be supported in rotationally chuck 2,3 principal part 9,10 far-end in case with corresponding locking cylindrical block 28,29 mating reactions on their radial seat 32,33.By the rotation of cam pin 34,35, the hemisphere seat 30,31 on the locking cylindrical block 28,29 just is pressed on the opposed spherojoint 24,25, so just can be spherojoint 24,25 fixed desired directions.
Arrange by this cam pin on chuck, particularly on the outer end of chuck, utilize the structure of chuck self, just can shorten the whole length of holder and shorten towards its outer end, so the ultimate range between ultimate range between two chucks and the bone bolt V is littler than the holder in past distance, thereby can use best on the holder that carpal joint and the general fracture of ossiculum of child are used.
For fracture not being pulled or compressing, this holder is provided with one to be 36 the banded device of tensioner with label and clearly to be shown in Figure 11 in Figure 13.
The sleeve 37 that it is M that tensioner 36 has a longitudinal axis, this sleeve have one form on its outer surface be essentially columniform packing 38 and many vertical clamping slots 39, and have one and be used for the centre bore 40 of latch shape instrument so that make sleeve 37 rotations. Telescopic end 41,42 is provided with female thread so that be used for admitting respective threads bar 43,44, and this two threaded rod is loaded with clamp device 45,46 at its opposite end and links securely with holder 1 so that be used for. Clamp device 45,46 is to be made of approximate prismatic support 47,48 basically, leaving axis M from its center of prism support extending is equidistant hook portion 49,50, hook portion 49,50 can be inserted in the cylindrical groove 51,52 that is located at scalable component 7,8 outer ends on the centrosome 4 easily, and the axis M of tensioner roughly parallels with the axis L of holder like this.Clamp device 45,65 is attached firmly on the holder 1 by the respective screws 53,54 of passing prismatic support 47,48 transverse holes.And the transverse holes of this support 47,48 has the axis that points to support hook portion 49,50 centers.
According to narration above, show and the using method of visible said fixing device.
After in bone bolt V has packed the fracture stump into, bone bolt 13 in the chuck, 14 and cam pin 34,35 all released with the intravital stall screw 18 in center, the length of harmonizing holder then, bolt V is inserted between the plate 11,12 and principal part 9,10 of chuck, then, thus bone bolt 13,14 and cam pin 34,35 are screwed into the directed of fixed chuck and bolt 18 are screwed into the length that fixes centrosome.
In case work as bone fracture restoration, just can concentrate compression by tensioner 36.Specific practice is, hook portion 49,50 is inserted in the cylindrical groove 51,52 of scalable component 7,8, can also can come rotational sleeve 37 by the hook on the packing 38 then by the pin shape instrument in the centre bore, make threaded rod 43,45 more close on demand or more away from.
Because centrosome has transparency to X ray, therefore can carry out the whole operations that make bone fracture restoration, with the x-ray bombardment fracture even from the side-irradiation of holder position, this just convenient greatly fracture processing is minimizing irradiation time also.
Tensioner can be attached to as easy as rolling off a log mode on the holder, because the hook portion hatch frame of clamp device, even also can conveniently use said apparatus in a narrower space.
Holder of the present invention is applicable to many modification and modification in this claim protection domain, as long as within scope of the present invention, and the size of said fixing device, shape and used material all can change.
Claims (16)
1. small-sized external fixator, be suitable for treatment adult fracture of ossiculum and child's fracture, it has a pair of chuck (2 that is used for bone bolt (V), 3), these two chucks are linked on the length-adjustable centrosome (4) by motionless spherojoint (5,6), and this centrosome has a male part (7) and a female part (8), male part (7) is connected with female part (8) telescopically, it is characterized in that: above-mentioned male part (7) is by the material of X ray highly transparent is made; And above-mentioned female part (8) is by basically the opaque material of X ray being constituted, and the sidewall wall thickness (S) that this female part (8) is had is reduced to and makes the sidewall can be at least to the X ray partially transparent.
2. external fixator according to claim 1 is characterized in that, above-mentioned material to the X ray highly transparent is a kind of thermoplastic resin noncrystal or the semi-crystal structure that has.
3. external fixator according to claim 2 is characterized in that, above-mentioned thermoplastic resin is selected from polyethers, polysulfonate, polyformaldehyde or polyetheramine ester.
4. external fixator according to claim 1 is characterized in that, above-mentioned is a kind of aluminium alloy to the opaque material of X ray basically.
5. external fixator according to claim 4 is characterized in that, above-mentioned have by the female part that the X ray opaque material is made (8) be approximately 1 millimeter maximum ga(u)ge.
6. external fixator according to claim 1 is characterized in that, it comprises the fixture that is used for fixing the rotation between scalable male part (7) and the scalable female part (8).
7. external fixator according to claim 6 is characterized in that, the fixture of above-mentioned rotation has a fore-and-aft plane (15) that is located on the scalable male part (7) with circle cross-section.
8. external fixator according to claim 7, it is characterized in that, the fixture of above-mentioned rotation has a pleurapophysis with respect to corresponding chuck (17) that forms in the end of scalable female part (8) and is provided with a hole that can hold crosswise fixed screw (18), fore-and-aft plane (15) mating reaction of this crosswise fixed screw and scalable male part (7) can prevent that so just scalable male part (7) from rotating around the longitudinal axis (L) of centrosome.
9. external fixator according to claim 8, it is characterized in that, above-mentioned pleurapophysis (17) has a longitudinal center portion (19), make on the termination of formed scalable female part (8) and have radial elastic, and above-mentioned termination can be flexibly closed by means of above-mentioned crosswise fixed screw (18), accomplishes to fix selectively above-mentioned scalable male part (7).
10. external fixator according to claim 1, it is characterized in that, each chuck (2,3) has the master prismatic portion (9,10) of a tape spool to through hole (20,21), places a spherojoint (24,25) of linking a corresponding described scalable male part (7) and female part (8) in the axially extending bore.
11. external fixator according to claim 10, it is characterized in that, a block (28,29) inserts a corresponding axially extending bore (20,21) in, above-mentioned block (28,29) is vertically held one an energy and the interactional proximate hemisphere seat of a corresponding spherojoint (24,25) (30,31), at the block other end a radially cylindrical seat (32,33) is arranged.
12. external fixator according to claim 11 is characterized in that, a horizontal cam pin (34,35) be supported on the outer end of each chuck (2,3) rotationally, with a corresponding locking cylindrical block in its radial seat (32,33) go up mating reaction with fixing above-mentioned spherojoint (24,25).
13. external fixator according to claim 10 is characterized in that, each chuck (2,3) plate (11,12) that can rest in the prismatic portion of above-mentioned master (9,10) is arranged in case with main prismatic portion (9,10) together, fixing one or more horizontal bone bolts (V),
14. external fixator according to claim 1 is characterized in that, above-mentioned centrosome (4) has the detachable lower device that links to each other with a tensioner (36), is used for compressing at fracture.
15. external fixator according to claim 14 is characterized in that, above-mentioned tensioner (36) has a pair of clamp device (45,46), links respective threaded bar (43, the 44) end that is screwed into a pivotable sleeve (37) end (41,42).
16. external fixator according to claim 15, it is characterized in that, above-mentioned clamp device (45,46) has hook portion (49,50), hook portion (49,50) insert be located at above-mentioned male part (7) and female part (8) mutual away from the end on the complementary grooving of hook portion (51,52) in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97111548 CN1127325C (en) | 1996-05-15 | 1997-05-14 | Compact external fixator |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT000044A/96 | 1996-05-15 | ||
| IT000044A/1996 | 1996-05-15 | ||
| CN 97111548 CN1127325C (en) | 1996-05-15 | 1997-05-14 | Compact external fixator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1169279A CN1169279A (en) | 1998-01-07 |
| CN1127325C true CN1127325C (en) | 2003-11-12 |
Family
ID=5171791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97111548 Expired - Lifetime CN1127325C (en) | 1996-05-15 | 1997-05-14 | Compact external fixator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1127325C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9924969B2 (en) | 2012-09-04 | 2018-03-27 | Zimmer, Inc. | External fixation |
| US9301782B2 (en) | 2012-09-04 | 2016-04-05 | Zimmer, Inc. | External fixation |
| ITVR20130013A1 (en) * | 2013-01-21 | 2014-07-22 | Tecres Spa | EXTERNAL FIXING DEVICE FOR THE TREATMENT OF BONE FRACTURES |
| US9962187B2 (en) | 2014-08-11 | 2018-05-08 | Zimmer, Inc. | External fixation |
| CN104257421A (en) * | 2014-10-22 | 2015-01-07 | 毕宏政 | External fixation clamp allowing multidirectional adjustment |
| CN104523349B (en) * | 2015-01-05 | 2017-09-22 | 山东中医药大学 | A kind of method for building up of the hypertrophy bone nonunion model of the dry cartilage connection of rat femur |
| CN107645936B (en) * | 2015-03-25 | 2021-06-08 | 捷迈有限公司 | Clamp assembly for external fixation system |
| US20160367291A1 (en) | 2015-06-17 | 2016-12-22 | Nathan Erickson | Ankle fixation system |
| CN106037903A (en) * | 2016-08-22 | 2016-10-26 | 苏州益诺斯医疗科技有限公司 | Ankle joint support |
| CN109674485A (en) * | 2019-01-31 | 2019-04-26 | 中南大学湘雅医院 | A kind of knee joint x-ray image detection device and its application method |
| CN112220541B (en) * | 2020-11-11 | 2021-07-23 | 佳木斯大学附属第一医院 | Wrist fracture first aid external fixation support |
-
1997
- 1997-05-14 CN CN 97111548 patent/CN1127325C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1169279A (en) | 1998-01-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20041119 Address after: Amsterdam Patentee after: Orthofix Internat B. V. Address before: Italy, Verona Patentee before: Orthofix Srl |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20061124 Address after: Italy Bussolengo Patentee after: Orthofix Srl Address before: Amsterdam Patentee before: Orthofix Internat B. V. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20031112 |