CN100457056C - Detachable tractor for skull and jaw bone - Google Patents
Detachable tractor for skull and jaw bone Download PDFInfo
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- CN100457056C CN100457056C CNB2007100674574A CN200710067457A CN100457056C CN 100457056 C CN100457056 C CN 100457056C CN B2007100674574 A CNB2007100674574 A CN B2007100674574A CN 200710067457 A CN200710067457 A CN 200710067457A CN 100457056 C CN100457056 C CN 100457056C
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- sleeve pipe
- screw rod
- screwed pipe
- skull
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Abstract
The invention discloses a detachable skull-jaw tractor, which comprises the following parts: casing (1), screw rod (2), screwed pipe (3), mobile tract board (4) and fixed tract board (5), wherein the guide limit groove (41) is set on the end face of mobile tract board (4); one plug side (71) is set on the exterior of screwed pipe (3), which is inserted into guide limit groove (41) to slip corresponding guide limit groove (41); one baffle block (42) is set on the upper end face of mobile tract board (4); the screw of slipping seat (6) is connected on one end of casing (1); one guide limit groove (51) is set on the end face of fixed tract board (5); one plug side (61) is set on the slipping seat (6); one projected cup (11) is set on the casing (1), which mates flute (52); the projected cup (11) chucks in the flute (52); the tractor can be detached from mobile and fixed tract boards without operating, when rotating screw rod and casing.
Description
Technical field
The invention belongs to the technical field of medical that is used for skull, jawbone surgery and plastic surgery operations, relate in particular to a kind of detachable tractor for skull and jaw bone.
Background technology
Tractor for skull and jaw bone is to be widely used in oral and maxillofacial surgery or head surgery and the plastic surgery operations, the know-why of traction apparatus may be summarized to be: cut jawbone soft tissue on every side earlier, after mandibular bone blocked fully or not exclusively block, gradually bone stump is strutted to make with external force and form the gap, utilize pull strength to bring out the osteogenic ability of jawbone self and continue to form new bone and fill this gap, reach the purpose that prolongs mandibular bone.This technology is utilized the body tissue regeneration potential, can repair various congenital or bone defective or defective deformities that the day after tomorrow, reason caused.
The patent that relates to tractor for skull and jaw bone also has, if any a patent No. is that the Chinese utility model patent " jaw bone tractor " of ZL98225259.5 (notification number is CN2341572Y) has disclosed a kind of such structure, a kind of jaw bone tractor, include screwed pipe, screw rod, sleeve pipe and by screw bolt seat with constitute the screw rod rotation regulating mechanism with its adjusting rod that is connected by gimbal structure, screw rod is positioned at sleeve pipe, its end passes sleeve bottom and fixes with screw bolt seat, the screwed pipe plug is connected in sleeve pipe and with screw flight, its head is fixed with screw frame and thimble, and sleeve outer wall then is fixed with corresponding screw frame.This utility model convenient fixing, the length adjustment freedom has stable stretching resistance, thereby more helps the carrying out of performing the operation, thereby reaches effectively, therapy rehabilitation effect efficiently.Screw frame in this jaw bone tractor and thimble all are fixed together with screwed pipe, screw rod, sleeve pipe, for this reason after jawbone traction operation is finished, also must cut jawbone soft tissue on every side once more, take out jaw bone tractor more fully, just calculate and really finish operation, make the patient increase the misery of operation again like this, prolonged the medical time.
Also having a patent No. is that the Chinese utility model patent " oral cavity built-in inferior maxilla drawbar extension device " of ZL99234512.X (notification number is CN2378010Y) has disclosed a kind of like this oral cavity built-in inferior maxilla drawbar extension device, it is characterized in that: comprise pedestal, guide rod and screw rod, the base level wing is established the four prisms cylinder in six prismatic holes in being, vertical alar part is inverted T-shaped three hole fixing heads, the guide rod horizontal tail is the hexagonal prism in reverse thread hole in front end is provided with, the guide rod horizontal tail slidably is located in the base level wing six rib holes, screw rod is the cylinder that has the forward screw thread, screw rod is established in the dried guide rod horizontal tail, its screw thread coincide mutually, be provided with the positioning sleeve and the fairlead that limit both sides, screw rod head front and back in the pedestal, the screw rod end is provided with the collar that the lockmaking guide rod is deviate from.Though it is embedded in the oral cavity when using, and does not expose skin, because inverted T-shaped three hole fixing heads remain with pedestal and are fixed together, so after jawbone traction operation is finished, also must cut the soft tissue around the jawbone once more, take out jaw bone tractor fully after, the whole surgery process is finished.
So existing jaw bone tractor also can improve further.
Summary of the invention
Technical problem to be solved by this invention is that a kind of tractor for skull and jaw bone that can be conveniently the traction apparatus mobile jib be disassembled from movable towing plate and fixed traction plate is provided at above-mentioned prior art present situation, and it also has the advantage of reasonable in design, easy accessibility.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: a kind of detachable tractor for skull and jaw bone includes sleeve pipe, screw rod, screwed pipe, movable towing plate, fixed traction plate; Screw rod plugs and is spacing in sleeve pipe, and sleeve pipe is exposed in the lower end of screw rod, and the activity from top to down of screwed pipe inner end is plugged in the sleeve pipe and with screw flight and is connected, and movable towing plate links to each other with the screwed pipe outer end, and the fixed traction plate links to each other with sleeve pipe; It is characterized in that: the structure that movable towing plate links to each other with the screwed pipe outer end is, one first guide and limit groove is set on the end face of movable towing plate, be provided with one first insert edge in the outer end of screwed pipe, the first insert edge wedge inserts in the first guide and limit groove and can the relative first guide and limit groove slippage, also is provided with one and the screwed pipe block that offsets and join on the upper surface of movable towing plate; The structure that the fixed traction plate links to each other with sleeve pipe is, be connected with a sliding seat at the sleeve pipe threaded one end, have between screwed pipe and the sliding seat and prevent the position limiting structure that relatively rotates with respect to each other, one second guide and limit groove is set on the end face of fixed traction plate, on sliding seat, be provided with one second insert edge, the second insert edge wedge inserts in the second guide and limit groove and can the relative second guide and limit groove slippage, on sleeve pipe, also has a bulge loop, be provided with the groove that matches with bulge loop on the end face of fixed traction plate, described bulge loop is in limited impression.
Above-mentioned screwed pipe and the position limiting structure between the sliding seat are: its length direction is provided with a gathering sill in screwed pipe outer peripheral face upper edge, is provided with one and the raised line that matches of gathering sill on the inwall of sliding seat.This position limiting structure is the simplest, and the number of gathering sill and raised line can be a plurality of certainly, also can adopt existing other anti-rotation position limiting structure certainly.
For ease of assembling, above-mentioned screwed pipe outer end is fixed with a union joint, and described first insert edge is arranged on the union joint.Certainly also direct molding one insert edge on screwed pipe.
Turn screw rod or sleeve pipe for ease of the instrument that uses similar spanner, above-mentioned screw rod exposes telescopic lower end and has the little outer-hexagonal swivel head that makes things convenient for us to turn, and described sleeve pipe lower end is fixed with the big outer-hexagonal swivel head that makes things convenient for revoling tube.
Above-mentioned screw rod one end has a convex shoulder, has one and the interior omoplate that matches of convex shoulder in the sleeve pipe, is embedded with a positioning block in sleeve pipe, and locating piece is set in outside the screw rod, and locating piece and convex shoulder gear cooperate.The above-mentioned upper end at screw rod is fixed with a fixed block, and having one in the inner end of screwed pipe can keep off the interior omoplate of establishing mutually with fixed block.These two kinds of structures are the most conventional position limiting structure, also can adopt other existing various position limiting structures certainly.
The first guide and limit groove on the above-mentioned movable towing plate is a T-slot, runs through before and after this T-slot; The second guide and limit groove on the described fixed traction plate is a T-slot, runs through before and after this T-slot.T-slot is guiding and spacing the most stable groove structure, and processing is also convenient, also can adopt dovetail groove certainly, and just its processing is complicated, and it is big to occupy the space.
For convenient fixing head and movable fixing head are fixed on the jawbone, have a plurality of installing holes on the above-mentioned movable towing plate, also have a plurality of installing holes on the described fixed traction plate.
Compared with prior art, the invention has the advantages that: between movable towing plate and the screw rod, reach to be removably between fixed traction plate and the sleeve pipe and connect, and dismounting the time only needs rotating screw bolt and sleeve pipe, can be with screw rod, screwed pipe, sleeve pipe, the traction apparatus mobile jib that sliding seat is formed disassembles from movable towing plate and fixed traction plate, like this after this traction apparatus is finished the distraction osteogenesis operation, need not to perform an operation again, only need to cut the trail openning at corresponding soft tissue, rotating screwed pipe and sleeve pipe just can take off the traction apparatus mobile jib, and only movable towing plate and fixed traction plate are stayed in body, again because movable towing plate and fixed traction plate are very thin, it adopts titanium alloy to make again, so to almost not influence of human body.
Description of drawings
Fig. 1 is the partial sectional view of the embodiment of the invention;
Fig. 2 is that the A-A of Fig. 1 is to view;
Fig. 3 is that the B-B of Fig. 1 is to cutaway view;
Fig. 4 is the vertical view of movable towing plate in the embodiment of the invention;
Fig. 5 is the cutaway view of movable towing plate in the embodiment of the invention;
Fig. 6 is the vertical view of fixed traction plate in the embodiment of the invention;
Fig. 7 is the cutaway view of fixed traction plate in the embodiment of the invention;
Fig. 8 is the sketch map of sliding seat in the embodiment of the invention;
Fig. 9 is that the C-C of Fig. 8 is to cutaway view;
Figure 10 is the sketch map of union joint in the embodiment of the invention
Figure 11 is the cutaway view of embodiment of the invention middle sleeve;
Figure 12 is the cutaway view of screwed pipe in the embodiment of the invention;
Figure 13 is the sketch map of screwed pipe in the embodiment of the invention;
Figure 14 is the cutaway view of screw rod in the embodiment of the invention.
The specific embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.
A kind of detachable tractor for skull and jaw bone shown in Fig. 1～3 includes sleeve pipe 1, screw rod 2, screwed pipe 3, movable towing plate 4, fixed traction plate 5; The tail end circumference of sleeve pipe 1 is welded with one and makes things convenient for the telescopic big outer-hexagonal swivel head 12 of our turn, these big outer-hexagonal swivel head 12 hollows, screw rod 2 plugs and is spacing in sleeve pipe 1, screw rod 2 sleeve pipe 1 rotation relatively, sleeve pipe 1 and big outer-hexagonal swivel head 12 are exposed in the lower end of screw rod 2, the upper end of screw rod 2 and sleeve pipe 1 upper end almost flush, the lower end that screw rod 2 exposes sleeve pipe 1 has the little outer-hexagonal swivel head 21 that makes things convenient for us to turn, screw rod 2 one ends have a convex shoulder 22, have one and the interior omoplate 13 that matches of convex shoulder 22 in the sleeve pipe 1, in sleeve pipe 1, be embedded with a positioning block 8, this locating piece 8 just in time is positioned at the junction of sleeve pipe 1 and big outer-hexagonal swivel head 12, and locating piece 8 is set in outside the screw rod 2, and carries out gear with the convex shoulder 22 of screw rod 2 and cooperate.
Shown in Figure 12,13,14, screwed pipe 3 inner end activities are plugged in the sleeve pipe 1 and with screw rod 2 and are threaded, but and in the screwed pipe 3 retraction sleeve pipes 1, be fixed with a fixed block 9 in the upper end of screw rod 2, in the inner end of screwed pipe 3, have one and can keep off the interior omoplate of establishing 32 mutually with fixed block 9, gear by fixed block 9 and interior omoplate 32 cooperates, and can prevent effectively that screwed pipe 3 is completely pulled out of sleeve pipe 1.
Shown in Fig. 4,5, movable towing plate 4 links to each other with screwed pipe 3 outer ends, and fixed traction plate 4 links to each other with sleeve pipe 1, and wherein movable towing plate 4 and fixed traction plate 5 are roughly lamellar, all have a plurality of installing holes 43,53 at movable towing plate 4 and fixed traction plate 5.
As Fig. 6, shown in 7, the structure that fixed traction plate 5 links to each other with sleeve pipe 1 is, comprise that one has the sliding seat 6 of tapped through hole 62, on the front end side face of sleeve pipe 1, be shaped on one section external screw thread 13, this sliding seat 6 is threaded on the external screw thread 13 of sleeve pipe 1, have between screwed pipe 3 and the sliding seat 6 and prevent the position limiting structure that relatively rotates with respect to each other, this position limiting structure is: be provided with a gathering sill 31 at screwed pipe 3 its length directions of outer peripheral face upper edge, on the inwall of sliding seat 6, be provided with one and the raised line 63 that matches of gathering sill 31, when sliding seat 6 was threaded on the sleeve pipe 1, described raised line 63 snapped in described gathering sill 31 to lead.As Fig. 8, shown in 9, one second guide and limit groove 51 is set on the end face of fixed traction plate 5, this second guide and limit groove 51 runs through for T-slot and front and back, on sliding seat 6, be provided with one second insert edge 61, second insert edge, 61 wedges insert in the second guide and limit groove 51 and can 51 slippages of the relative second guide and limit groove, on sleeve pipe 1, also has a bulge loop 11, as shown in figure 10, on the end face of fixed traction plate 5, be provided with the groove 52 that matches with bulge loop 11, described bulge loop 11 snaps in and is spacing in groove 52, but bulge loop 11 relative fixed towing plates 5 rotations like this, but can not move forward and backward by relative fixed towing plate 5.
Each parts involved in the present invention are good with the titanium alloy that adopts and the human body intermiscibility is fabulous.This tractor for skull and jaw bone not only can be used for jawbone traction operation, also can be applicable to the skull traction operation.
The installation of detachable tractor for skull and jaw bone involved in the present invention and traction method step are (is example with jawbone traction operation):
1., select model and definite traction apparatus installation site of suitable tractor for skull and jaw bone
On patient's skin, mark the apparent position of Mandible Osteotomy line, on skin, place tractor for skull and jaw bone, can help to determine the position of tractor for skull and jaw bone with respect to soft tissue along mandibular bone.Installation site in order to ensure tractor for skull and jaw bone is comfortable and come-at-able, and patient's head should be positioned at the centre position.It is external that the traction apparatus operating point is exposed.
2., installation activity towing plate
Remember at the mandibular bone subscript and osteotomy site.With hole of diameter 1.6mm bit drills, be used for fixing the titanium nail hole of movable towing plate 4, screw in the titanium nail, but do not fix movable towing plate 4 tight.
3., osteotomy
4., the tractor for skull and jaw bone mobile jib of being made up of sleeve pipe 1, screw rod 2, screwed pipe 3 etc. is installed
The fragment of the whole bones on the removing activity towing plate 4 in the first guide and limit groove 41, in the first guide and limit groove 41 with the 6 wedge insertion activity towing plates 4 of the sliding seat on the sleeve pipe 1, the titanium nail hole that is used for fixing fixed traction plate 5 with diameter 1.6mm bit drills, screw-in titanium nail, but fixing not tight fixed traction plate 5.Get out the other titanium nail hole that is used for fixing movable towing plate 4 with diameter 1.6mm drill bit simultaneously, screw in the titanium nail, also the titanium nail is not screwed.
5., finish osteotomy and fixing whole titanium nail
6., traction
After tractor for skull and jaw bone is fixing, should be no less than 7 days fixedly phase, just can go the distraction osteogenesis art.With the little outer-hexagonal swivel head 21 on the interior hexagonal insertion screw rod 2 of retractor handle, rotation traction traction device handle (press handle upward arrow indicate direction) in the direction of the clock, threaded adjusting principle by screw rod 2 and screwed pipe 3, screwed pipe 3 relative screw rod 2 reaches, it is 0.4mm that handle whenever revolves the hauling distance that turns around, be screw rod 2 relative screw rod reach 0.4mm, underlined on retractor handle, can determine hauling distance easily, jawbone fracture place this moment produces the gap, utilizes pull strength to bring out the osteogenic ability of jawbone self and continues to form new bone and fill this gap.After reaching clinical Expected Results, stop traction.
The method for dismounting of detachable tractor for skull and jaw bone involved in the present invention
1., after traction finishes, need to remove the tractor for skull and jaw bone mobile jib.Cut soft tissue, with the little outer-hexagonal swivel head 21 on the interior hexagonal insertion screw rod 2 of retractor handle, by counter clockwise direction rotation traction traction device handle (pressing the opposite direction that the handle upward arrow indicates), rotation 10 circles, screwed pipe moves behind the screw rod 2 for 3 this moments relatively, because movable towing plate 4 is fixed, screwed pipe 3 also just moves behind the movable relatively towing plate 4, withdraw from the first guide and limit groove 41 on the movable towing plate 4 until being fixed on first insert edge 71 on screwed pipe 3 union joints 7, movable towing plate 4 and screwed pipe 3 are broken away from.
2., the interior hexagonal of tractor for skull and jaw bone being removed handle is inserted the big outer-hexagonal swivel head 12 on the retractor body, by counter clockwise direction rotation traction traction device handle (pressing the opposite direction that the handle upward arrow indicates), rotation 10 circles, make sliding seat 6 relative sleeve pipes 3 and 5 reaches of fixed traction plate, break away from sleeve pipe 3 and fixed traction plate 5 fully until sliding seat 6.
3., after screwed pipe 3 and sleeve pipe 1 break away from fully with movable towing plate 4 and fixed traction plate 5, lightly the traction apparatus mobile jib of being made up of sleeve pipe 1, screw rod 2, screwed pipe 3 etc. is mentioned from new surface of bone, make it district away from Xin Gu, take out external destruction then, in order to avoid reuse, movable towing plate 4 and fixed traction plate 5 then stay in body, and movable towing plate 4 and fixed traction plate 5 are very thin, it adopts titanium alloy to make again, so to almost not influence of human body.
Claims (8)
1, a kind of detachable tractor for skull and jaw bone includes sleeve pipe (1), screw rod (2), screwed pipe (3), movable towing plate (4), fixed traction plate (5); Screw rod (2) plugs and is spacing in sleeve pipe (1), sleeve pipe (1) is exposed in the lower end of screw rod (2), the activity from top to down of screwed pipe (3) inner end is plugged in the sleeve pipe (1) and with screw rod (2) and is threaded, movable towing plate (4) links to each other with screwed pipe (3) outer end, and fixed traction plate (5) links to each other with sleeve pipe (1); It is characterized in that:
Movable towing plate (4) with the structure that screwed pipe (3) outer end links to each other is, one first guide and limit groove (41) is set on the end face of movable towing plate (4), be provided with one first insert edge (71) in the outer end of screwed pipe (3), first insert edge (71) wedge inserts in the first guide and limit groove (41) and can relative first guide and limit groove (41) slippage, also is provided with one and screwed pipe (3) block (42) that offsets and join on the upper surface of movable towing plate (4);
Fixed traction plate (5) with the structure that sleeve pipe (1) links to each other is, be connected with a sliding seat (6) at sleeve pipe (1) threaded one end, have between screwed pipe (3) and the sliding seat (6) and prevent the position limiting structure that relatively rotates with respect to each other, one second guide and limit groove (51) is set on the end face of fixed traction plate (5), on sliding seat (6), be provided with one second insert edge (61), second insert edge (61) wedge inserts in the second guide and limit groove (51) and can relative second guide and limit groove (51) slippage, on sleeve pipe (1), also has a bulge loop (11), be provided with on the end face of fixed traction plate (5) and groove (52) that bulge loop (11) matches, described bulge loop (11) is spacing in groove (52).
2, detachable tractor for skull and jaw bone according to claim 1, it is characterized in that the position limiting structure between described screwed pipe (3) and the sliding seat (6) is: its length direction is provided with a gathering sill (31) in screwed pipe (3) outer peripheral face upper edge, is provided with one and the raised line (63) that matches of gathering sill (31) on the inwall of sliding seat (6).
3, detachable tractor for skull and jaw bone according to claim 1 is characterized in that described screwed pipe (3) outer end is fixed with a union joint (7), and described first insert edge (71) is arranged on the union joint (7).
4, detachable tractor for skull and jaw bone according to claim 1, it is characterized in that the lower end that described screw rod (2) exposes sleeve pipe (1) has the little outer-hexagonal swivel head (21) that makes things convenient for us to turn, described sleeve pipe (1) lower end is fixed with the big outer-hexagonal swivel head (12) that makes things convenient for revoling tube.
5, detachable tractor for skull and jaw bone according to claim 1, it is characterized in that described screw rod (2) one ends have a convex shoulder (22), have one and the interior omoplate (13) that matches of convex shoulder (22) in the sleeve pipe (1), in sleeve pipe (1), be embedded with a positioning block (8), locating piece (8) is set in outside the screw rod (2), and locating piece (8) and the cooperation of convex shoulder (22) gear.
6, detachable tractor for skull and jaw bone according to claim 1 is characterized in that: be fixed with a fixed block (9) in the upper end of screw rod (2), having one in the inner end of screwed pipe (3) can keep off the interior omoplate of establishing (32) mutually with fixed block (9).
7, detachable tractor for skull and jaw bone according to claim 1 is characterized in that the first guide and limit groove (41) on the described movable towing plate (4) is a T-slot, runs through before and after this T-slot; The second guide and limit groove (51) on the described fixed traction plate (5) is a T-slot, runs through before and after this T-slot.
8, detachable tractor for skull and jaw bone according to claim 1 is characterized in that having a plurality of installing holes (43) on the described movable towing plate (4), also has a plurality of installing holes (53) on the described fixed traction plate (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100674574A CN100457056C (en) | 2007-03-13 | 2007-03-13 | Detachable tractor for skull and jaw bone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100674574A CN100457056C (en) | 2007-03-13 | 2007-03-13 | Detachable tractor for skull and jaw bone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101015469A CN101015469A (en) | 2007-08-15 |
| CN100457056C true CN100457056C (en) | 2009-02-04 |
Family
ID=38724802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100674574A Active CN100457056C (en) | 2007-03-13 | 2007-03-13 | Detachable tractor for skull and jaw bone |
Country Status (1)
| Country | Link |
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| CN (1) | CN100457056C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106618649A (en) * | 2016-11-11 | 2017-05-10 | 中国医学科学院整形外科医院（整形外科研究所） | Craniomaxilla retractor |
| CN107669357A (en) * | 2017-11-09 | 2018-02-09 | 南京医科大学附属口腔医院 | The horizontal Distraction Apparatus of alveoli dentales mandibulae bone |
| CN109567883A (en) * | 2018-05-25 | 2019-04-05 | 宁波慈北医疗器械有限公司 | A kind of jaw bone tractor of self-locking function |
| CN110292428A (en) * | 2019-07-31 | 2019-10-01 | 齐孝宇 | Bone stretcher |
| CN114469251A (en) * | 2021-12-17 | 2022-05-13 | 中国人民解放军总医院第四医学中心 | Tibia assembled type osteotomy guide plate for artificial knee joint replacement |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4931055A (en) * | 1986-05-30 | 1990-06-05 | John Bumpus | Distraction rods |
| US5364396A (en) * | 1993-03-29 | 1994-11-15 | Robinson Randolph C | Distraction method and apparatus |
| US5540687A (en) * | 1993-05-19 | 1996-07-30 | Fairley; Jeffrey D. | Device for the distraction of bones |
| US6113599A (en) * | 1997-06-04 | 2000-09-05 | Kalpa Engineering, Inc. | Apparatus for internal mandibular distraction |
| CN201026231Y (en) * | 2007-03-13 | 2008-02-27 | 沈国芳 | Dismountable harnpan jawbone traction device |
-
2007
- 2007-03-13 CN CNB2007100674574A patent/CN100457056C/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4931055A (en) * | 1986-05-30 | 1990-06-05 | John Bumpus | Distraction rods |
| US5364396A (en) * | 1993-03-29 | 1994-11-15 | Robinson Randolph C | Distraction method and apparatus |
| US5540687A (en) * | 1993-05-19 | 1996-07-30 | Fairley; Jeffrey D. | Device for the distraction of bones |
| US6113599A (en) * | 1997-06-04 | 2000-09-05 | Kalpa Engineering, Inc. | Apparatus for internal mandibular distraction |
| CN201026231Y (en) * | 2007-03-13 | 2008-02-27 | 沈国芳 | Dismountable harnpan jawbone traction device |
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| Publication number | Publication date |
|---|---|
| CN101015469A (en) | 2007-08-15 |
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