CN106618649B

CN106618649B - Craniomaxillary bone tractor

Info

Publication number: CN106618649B
Application number: CN201610997704.XA
Authority: CN
Inventors: 游远榕; 归来
Original assignee: Plastic Surgery Hospital of CAMS and PUMC
Current assignee: Plastic Surgery Hospital of CAMS and PUMC
Filing date: 2016-11-11
Publication date: 2024-07-16
Anticipated expiration: 2036-11-11

Abstract

The invention relates to a craniomaxillary bone tractor which comprises a main body sleeve, a main body screw rod, a fixed titanium plate, a universal joint and an extension rod assembly, wherein the threaded end of the main body screw rod is arranged in the main body sleeve, one end of the fixed titanium plate is screwed on the main body screw rod and is arranged in the main body sleeve, the other end of the fixed titanium plate is exposed out of the main body sleeve, one end of the universal joint is connected with the main body screw rod, the other end of the universal joint is detachably connected with the extension rod assembly, and the rotation of the extension rod assembly can drive the main body screw rod to rotate so as to drive the fixed titanium plate to move along the main body sleeve. The tractor is provided with the detachable extension rod, and the wound of a patient is not required to be cut when the extension rod is detached, so that the pain of the patient is greatly relieved.

Description

Craniomaxillary bone tractor

Technical Field

The invention belongs to the technical field of medical instruments for skull, jaw surgery and plastic surgery, and particularly relates to a craniomaxillary bone tractor.

Background

Craniomaxillofacial distractors have been widely used in oral maxillofacial or craniofacial surgery and in orthopedic surgery, and the principle of application of the distractors can be summarized as follows: firstly cutting soft tissues around the jawbone, after the jawbone is completely cut off or not completely cut off, gradually expanding the broken ends of the jawbone by using external force to form a gap, and continuously forming new bone to fill the gap by using traction force to induce the osteogenesis capability of the jawbone, thereby achieving the purpose of prolonging the jawbone. The technology can repair bone defects or defect deformities caused by various congenital or acquired reasons by utilizing the regeneration potential of organism tissues.

In the existing craniomaxillofacial tractor, the structure generally consists of an extension rod and a main body part, wherein the main body part is internally provided with a screw rod, and the end part of the screw rod is connected with the extension rod. In order to avoid the extension rod remaining in the mouth after the operation, prevent inconvenience and related complications in nursing and the like brought to the patient, the extension rod can be designed into a detachable form, and the extension rod is detached after the operation. However, in the existing detachable tractor, the part of the extension rod, which is separated from the main body, is positioned at one end of the main body, the part is embedded into the tissue after the operation, and when the extension rod is separated from the main body after the long-term bone extension is finished, the extension rod can be detached only by cutting a wound through an operation to expose a separation joint, so that great pain and inconvenience are brought to a patient.

Disclosure of Invention

The invention aims to solve the technical problem of providing a craniomaxillary bone tractor which is provided with a detachable extension rod, and the wound of a patient is not required to be cut when the extension rod is detached, so that the pain of the patient is greatly relieved.

The technical scheme for solving the technical problems is as follows: the utility model provides a craniomaxillary bone tractor, includes main part sleeve, main part screw rod and fixed titanium board, the screw thread end of main part screw rod is arranged in inside the main part sleeve, fixed titanium board one end spin in on the main part screw rod and arrange in inside the main part sleeve, the other end expose in the main part sleeve, unlike prior art, still include universal joint and extension rod subassembly, universal joint one end with the main part screw rod is connected, the other end with extension rod subassembly detachable is connected, rotates the extension rod subassembly accessible universal joint drives main part screw rod rotates, and then drives fixed titanium board is followed main part sleeve removes.

The technical scheme has the advantages that one end of the universal joint is connected with the main body screw rod, the other end of the universal joint is detachably connected with the extension rod assembly, the extension rod can be screwed during operation and bone traction, the main body screw rod is driven to rotate by the driving of the universal joint, and then the fixed titanium plate is driven to move along the main body sleeve, so that traction operation is realized, when the extension rod is required to be detached after the operation and bone traction are finished, the extension rod is detached from one end of the universal joint, further, the wound can be prevented from being cut again, meanwhile, the extension rod assembly can be prevented from being exposed outside a patient for a long time in a stable period, postoperative care is facilitated, and the postoperative infection opportunity is reduced.

On the basis of the technical scheme, the invention can be improved as follows.

Further, the extension rod assembly comprises a screwing rod sleeve and a screwing rod, the screwing rod sleeve is of a hollow rod-shaped structure, and the screwing rod penetrates through the screwing rod sleeve and then is detachably connected with one end of the universal joint, and the screwing rod sleeve and the universal joint are fixed into a whole.

The technical scheme has the beneficial effects that the screw rod sleeve can be conveniently fixed at one end of the universal joint through the way that the screw rod penetrates through the screw rod sleeve and then is connected with the universal joint, so that the screw rod sleeve is convenient to detach.

Further, the universal joint is provided with a threaded hole at one end connected with the extension rod assembly, an external thread matched with the threaded hole is provided at one end of the screwing rod, and the screwing rod penetrates through the screwing rod sleeve and is in threaded connection with the universal joint.

The screw rod is inserted into the screw rod sleeve in the mounting process, and then screwed into the threaded hole of the universal joint, so that the screw rod is stable and reliable, convenient to mount and dismount, and convenient to operate by only screwing the screw rod at the end part, further away from the operation position of a patient, and convenient for a doctor to operate while relieving pain of the patient.

Further, the other end of the twisting rod is of a cap brim-shaped structure, and the end face of the twisting rod is provided with a straight-line groove or a cross-shaped groove.

The screw rod sleeve has the beneficial effects that the screw rod sleeve can be clamped by the cap brim-shaped structure to prevent loosening, and meanwhile, the screw rod sleeve can be conveniently installed and fixed by using a screwdriver or other tools by utilizing the linear groove or the cross-shaped groove.

Further, the screw rod sleeve and the universal joint are mutually matched, clamped and fixed, and relative rotation between the screw rod sleeve and the universal joint does not occur after clamping.

The technical scheme has the advantages that the screw rod sleeve and the universal joint are mutually matched and clamped and fixed, the screw rod sleeve and the universal joint are fixed into a whole after installation, and relative rotation between the screw rod sleeve and the universal joint is prevented when the screw rod sleeve is screwed, so that the accurate control of the traction distance during traction operation can be ensured.

Further, the outer side wall of one end of the screw rod sleeve, which is far away from the universal joint, is of a polygonal structure.

The polygonal structure can be fixed by tools such as a wrench when being installed or detached, and the screwing rod is screwed in or screwed out of the universal joint, so that the screwing rod sleeve can be better kept stable during operation, and greater pain to a patient is avoided.

Further, the craniomaxillary bone tractor further comprises a socket spanner, one end of the socket spanner is a handle, and the other end of the socket spanner is provided with a polygonal hole matched with the polygonal structure.

The technical scheme has the advantages that a doctor can hold the handle part of the wrench, sleeve the polygonal hole at the other end of the handle outside the polygonal structure at the end part of the screw rod sleeve, fix the screw rod sleeve and then operate the screw rod. Simple and convenient and easy to operate.

Further, the universal joint comprises a connecting joint and a cross joint, a pair of oppositely arranged lugs are respectively arranged at the non-threaded end of the main body screw rod and one end of the connecting joint, and the cross joint is respectively in one-to-one corresponding rotary connection with the two pairs of lugs; the other end of the connecting joint is detachably connected with the extension rod assembly.

The universal joint has the advantages that the universal joint formed by the cross joint and the connecting joint can realize the function of universal connection, and meanwhile, the universal joint is small in size, easy to process and manufacture and low in cost.

Further, two fixed titanium plates are arranged, one section of the main body screw is provided with a forward thread, the other section of the main body screw is provided with a reverse thread, and the two fixed titanium plates are respectively screwed on the two sections of threads.

The beneficial effects of adopting above-mentioned further scheme are, utilize positive and negative two to the screw thread to drive a fixed titanium board respectively, can realize that two fixed titanium boards are close to simultaneously or keep away from simultaneously, set up two fixed titanium boards in the both sides at main part screw rod middle part, just so can reduce the whole length of tractor, and then can be convenient for operation, furthest's reduction is to the wound that the patient caused, simultaneously, because the length is less, also is applicable to children patient more.

Further, the fixed titanium plate is of an integrally formed structure or an assembled structure.

The technical scheme has the beneficial effects that the integrated structure is easy to process and manufacture, low in cost and high in replaceability of the assembled structure, and can be assembled in different specifications, or in different shapes and sizes. On the other hand, when adopting assembled structure, because the fixed plate can freely dismantle, just can be with main part screw rod and fixed titanium board whole be fixed in the bone department of the craniomaxillary bone that needs the operation in the operation, dismantle main part screw rod subassembly from the fixed plate before cutting the bone, cut the bone in two fixed plate space departments again, be fixed in two fixed plates with main part screw rod and extension rod after cutting the bone again after accomplishing, can guarantee the accuracy of bone traction direction like this, avoid cutting bone both ends and take place rotary displacement and separate each other.

Drawings

FIG. 1 is a schematic view of the overall structure of one embodiment of a craniomaxillary retractor provided by the present invention;

FIG. 2 is a schematic exploded view of the embodiment of FIG. 1;

FIG. 3 is a schematic view of a partial assembly of the embodiment of FIG. 1;

FIG. 4 is a schematic illustration of the embodiment of FIG. 1 with portions broken away;

FIG. 5 is a schematic view of the universal joint partially disassembled;

FIG. 6 is a schematic view showing the overall structure of another embodiment of a craniomaxillary retractor according to the present invention;

FIG. 7 is a schematic view of the structure of the fixed titanium plate in the embodiment shown in FIG. 6.

Wherein, the part number in the figure is expressed as:

1. The main body sleeve, 2, a main body screw rod, 3, a fixed titanium plate, 4, a universal joint, 5, an extension rod assembly, 6, a polygonal structure, 7, a socket wrench, 8, an ear seat, 21, forward threads, 22, reverse threads, 31, a screwing part, 32, a screw, 33, a traction part, 41, a connecting joint, 42, a cross joint, 51, a screwing rod sleeve, 52, a screwing rod, 521, a cross groove, 71, a handle, 72 and a polygonal hole.

Detailed Description

The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.

Embodiment 1 referring to fig. 1 to 5, fig. 1 is a schematic overall structure of a craniomaxillary retractor according to an embodiment of the present invention; FIG. 2 is a schematic exploded view of the embodiment of FIG. 1; FIG. 3 is a schematic view of a partial assembly of the embodiment of FIG. 1; FIG. 4 is a schematic illustration of the embodiment of FIG. 1 with portions broken away; fig. 5 is a partially disassembled view of the universal joint.

The craniomaxillary bone tractor provided by the embodiment comprises a main body sleeve 1, a main body screw rod 2 and two fixed titanium plates 3, wherein one section of the main body screw rod 2 is provided with forward threads 21, the other section of the main body screw rod 2 is provided with reverse threads 22, and the two fixed titanium plates 3 are respectively screwed on the two sections of threads.

The screw thread end of the main body screw rod 2 is arranged in the main body sleeve 1, one side of the main body sleeve 1 is provided with a slit, one end of the fixed titanium plate 3 is screwed on the main body screw rod 2 and is arranged in the main body sleeve 1, the other end of the fixed titanium plate is penetrated out of the slit of the main body sleeve 1 and exposed out of the main body sleeve 1, and the fixed titanium plate can move along the slit of the main body sleeve 1 under the driving of the main body screw rod 2 to realize the traction of the craniomaxillary bone of a patient.

The tractor in this embodiment further includes universal joint 4 and extension rod subassembly 5, universal joint 4 one end with main part screw rod 2 is connected, the other end with extension rod subassembly 5 detachable is connected, rotates extension rod subassembly 5 can drive main part screw rod 2 rotates, and then drives fixed titanium board 3 is followed main part sleeve 1 removes.

The extension rod assembly 5 includes a screw rod sleeve 51 and a screw rod 52, the screw rod sleeve 51 is of a hollow rod structure, the screw rod 52 passes through the screw rod sleeve 51 and is detachably connected with one end of the universal joint 4, the connection mode can be clamped, and the connection can also be performed by using a threaded connection mode as shown in the figure, so that the screw rod sleeve 51 and the universal joint 4 are fixed into a whole.

In the drawings, a threaded hole is formed in one end, connected with the extension rod assembly 5, of the universal joint 4, an external thread matched with the threaded hole is formed in one end of the screwing rod 52, and the screwing rod 52 is in threaded connection with the universal joint 4. The other end of the screw rod 52 is of a cap-shaped structure, and the end surface of the screw rod is provided with a cross-shaped groove 521, and the screw rod can also be a straight-shaped groove, so that an operator can conveniently use a screwdriver to operate.

The universal joint 4 comprises a connecting joint 41 and a cross joint 42, one end of the main body screw rod 2 and one end of the connecting joint 41 are respectively provided with a pair of oppositely arranged lugs 8, and the cross joint 42 is respectively in one-to-one corresponding rotary connection with the two pairs of lugs 8. One end of the screw sleeve 51 is engaged with the end of the connection adapter 41 to ensure that no relative rotation occurs between the screw sleeve 51 and the connection adapter 41. The clamping mode can be that two parts are provided with grooves and protrusions which are arranged in a staggered mode, concave-convex parts between the grooves and the protrusions are inserted in a staggered mode and are mutually meshed, and clamping is achieved. In order to ensure that no relative displacement occurs, the dimensions of the recesses and projections of the screw sleeve 51 and the connection fitting 41 need to be fitted with a certain tolerance.

In order to facilitate the assembly and disassembly of the screw rod assembly, the craniomaxillary bone tractor further comprises a socket wrench 7, wherein one end of the socket wrench 7 is provided with a handle 71, and the other end of the socket wrench is provided with a polygonal hole 72. The outer side wall of one end of the screw rod sleeve 51 far away from the universal joint 4 is of a polygonal structure 6, the polygonal hole 72 is matched with the polygonal structure 6, the screw rod sleeve can be just sleeved outside the polygonal structure 6, the number of sides of the polygonal hole 72 and the polygonal structure 6 is preferably six, and therefore the screw rod sleeve can be suitable for various common internal hexagonal wrenches.

The fixed titanium plate in this embodiment 1 is an assembled structure, that is, the assembled structure comprises a screwing part 31 and a traction part 33, the screwing part 31 is screwed on the main screw 2, the traction part 33 is provided with a fixing hole for fixing bones needing traction in operation, the screwing part 31 and the traction part 33 are fixed into a whole through a screw 32, thus the traction part can be made into various specifications, shapes and sizes, and a proper traction part can be selected according to the condition of a patient to be mounted on the screwing part. On the other hand, when adopting assembled structure, because the fixed plate can freely dismantle, just can be with main part screw rod and fixed titanium board whole be fixed in the bone department of the craniomaxillary bone that needs the operation in the operation, dismantle main part screw rod subassembly from the fixed plate before cutting the bone, cut the bone in two fixed plate space departments again, be fixed in two fixed plates with main part screw rod and extension rod after cutting the bone again after accomplishing, can guarantee the accuracy of bone traction direction like this, avoid cutting bone both ends and take place rotary displacement and separate each other.

Embodiment 2 referring to fig. 6 and 7, fig. 6 is a schematic overall structure of another embodiment of a craniomaxillary retractor according to the present invention; FIG. 7 is a schematic view of the structure of the fixed titanium plate in the embodiment shown in FIG. 6.

In this embodiment, the difference from embodiment 1 is that the fixed titanium plate is an integrally formed structure, and the rest of the structures are the same. The titanium plate is not detachable as in embodiment 1, but is easy to manufacture and has lower cost.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc. indicate orientations or positional relationships based on the one shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. The utility model provides a craniomaxillary bone tractor, includes main part sleeve (1), main part screw rod (2) and fixed titanium board (3), the screw thread end of main part screw rod (2) is arranged in inside main part sleeve (1), fixed titanium board (3) one end spin in main part screw rod (2) are arranged in inside main part sleeve (1), the other end expose in main part sleeve (1), characterized by still includes universal joint (4) and extension rod subassembly (5), universal joint (4) one end with main part screw rod (2) are connected, the other end with extension rod subassembly (5) detachable connection, rotate extension rod subassembly (5) accessible universal joint (4) drive main part screw rod (2) rotate, and then drive fixed titanium board (3) are followed main part sleeve (1) removes;

The threaded end of the main body screw rod (2) is arranged in the main body sleeve (1), one side of the main body sleeve (1) is provided with a slit, one end of the fixed titanium plate (3) is screwed on the main body screw rod (2) and is arranged in the main body sleeve (1), and the other end of the fixed titanium plate penetrates out of the slit of the main body sleeve (1) and is exposed out of the main body sleeve (1) and can move along the slit of the main body sleeve (1) under the drive of the main body screw rod (2);

the fixing titanium plate is of an assembled structure and comprises a screwing part (31) and a traction part (33), the screwing part (31) is screwed on the main screw (2), a fixing hole is formed in the traction part (33) and used for fixing bones needing traction in operation, and the screwing part (31) and the traction part (33) are fixed into a whole through a screw (32);

The extension rod assembly (5) comprises a screw rod sleeve (51) and a screw rod (52), the screw rod sleeve (51) is of a hollow rod-shaped structure, the screw rod (52) penetrates through the screw rod sleeve (51) and then is detachably connected with one end of the universal joint (4), and the screw rod sleeve (51) and the universal joint (4) are fixed into a whole; a threaded hole is formed in one end, connected with the extension rod assembly (5), of the universal joint (4), an external thread matched with the threaded hole is formed in one end of the screwing rod (52), and the screwing rod (52) is in threaded connection with the universal joint (4); the other end of the screw rod (52) is of a hat-shaped structure, and the end surface of the screw rod is provided with a straight-line groove or a cross-shaped groove (521).

2. The craniomaxillary retractor according to claim 1 wherein the screw sleeve (51) is fixed to the universal joint (4) by means of a snap fit, and no relative rotation occurs between the screw sleeve and the universal joint after the snap fit.

3. A craniomaxillary retractor according to claim 1 wherein the outer side wall of the end of the screw sleeve (51) remote from the universal joint (4) is of polygonal configuration (6).

4. A craniomaxillary retractor according to claim 3 further comprising a socket wrench (7), said socket wrench (7) being provided at one end with a handle (71) and at the other end with a polygonal hole (72) adapted to said polygonal structure (6).

5. The craniomaxillary retractor according to claim 1, wherein the universal joint (4) comprises a connecting joint (41) and a cross joint (42), the non-threaded end of the main screw (2) and one end of the connecting joint (41) are respectively provided with a pair of oppositely arranged ear seats (8), and the cross joint (42) is respectively in one-to-one corresponding rotary connection with the two pairs of ear seats (8); the other end of the connecting joint is detachably connected with the extension rod assembly (5).

6. The craniomaxillary retractor according to any one of claims 1 to 5 wherein there are two fixed titanium plates (3), one section of the main screw (2) is provided with a forward thread (21) and the other section is provided with a reverse thread (22), and the two fixed titanium plates (3) are screwed on the two sections of threads respectively.