CN215606174U

CN215606174U - Jaw traction fixing system

Info

Publication number: CN215606174U
Application number: CN202121055518.7U
Authority: CN
Inventors: 黎凡; 陈晋伟; 张煜; 章懋妤; 张敏; 邓盛榜; 陈常权
Original assignee: Shenzhen World Surgery Medical Device Technology Co ltd
Current assignee: Shenzhen World Surgery Medical Device Technology Co ltd
Priority date: 2021-05-11
Filing date: 2021-05-17
Publication date: 2022-01-25
Anticipated expiration: 2031-05-17

Abstract

The utility model relates to a jaw traction fixing system, which comprises a jaw traction apparatus and an extension handle, wherein the jaw traction apparatus comprises a traction frame, a screw, a fixed bone fracture plate and a movable bone fracture plate, a cavity is arranged in the traction frame along the length direction of the traction frame, a guide groove is arranged on the outer wall of the traction frame, the screw is arranged in the cavity, the fixed bone fracture plate is fixedly arranged on the traction frame, the movable bone fracture plate is provided with a guide part extending into the cavity from the guide groove, and the guide part is arranged on the screw in a penetrating manner, so that the movable bone fracture plate can be driven to move along the guide groove by the rotation of the screw around a shaft, and the distance between the fixed bone fracture plate and the movable bone fracture plate is further adjusted; the extension handle can be dismantled with the screw rod and be connected the setting, just the extension handle can drive the coaxial rotation of screw rod to solve the long-term infection that leads to of exposing of extension pole, the tractor circles round, not hard up scheduling problem.

Description

Jaw traction fixing system

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a jaw bone traction and fixation system.

Background

The elevated mandible and short body, temporomandibular joint hypoplasia and even the absence caused by mandibular hypoplasia are the most important factors for facial asymmetry. Distraction osteogenesis has been widely used in the treatment of asymmetric facial deformities in neonatal patients with cutaneous syndrome and children with hemifacial short deformities (HFMs) since McCarthy et al 1992 first successfully applied distraction to extend the mandible. The principle of the distraction osteogenesis is that after the bone is cut, a special distraction device is applied to slowly pull, so that new bone is formed in the osteotomy gap, and the purpose of bone extension is achieved.

Currently, some common mandible extenders have an extension rod for extending to the outside of the body surface, and a screwdriver is connected for rotating and expanding the retractor. The technical method has the following defects:

1. because the extension rod needs to penetrate the skin and is exposed for a long time, the infection probability is high;

2. the extension rod is easy to be collided by accident after long-term exposure, so that the tractor turns round and falls off, and the normal life and the treatment effect of a patient are influenced;

3. penetrate two sets of gram formula needles or screws of mandible through skin at facial buccal side to an helical structure is installed to between two sets of nails, drives ke shi needle or screw through wrench movement screw rod then and removes to opposite direction, and the installation of two sets of four nails is parallel to each other, is difficult to install screw means, and the operation degree of difficulty is big.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a jaw traction fixing system to solve the problems of infection, traction device convolution, looseness and the like caused by long-term exposure of an extension rod.

The specific scheme is as follows:

a jaw traction fixing system comprises a jaw traction device and an extension handle, wherein the jaw traction device comprises a traction frame, a screw, a fixed bone fracture plate and a movable bone fracture plate, a cavity is formed in the traction frame along the length direction of the traction frame, a guide groove which is formed in the outer wall of the traction frame along the length direction of the traction frame and communicated with the cavity is formed in the outer wall of the traction frame, the screw is installed in the cavity and extends along the length direction of the traction frame, the fixed bone fracture plate is fixedly installed on the traction frame, the movable bone fracture plate is provided with a guide part which extends into the cavity from the guide groove, the guide part is arranged on the screw in a penetrating mode and matched with the screw, so that the movable bone fracture plate can be driven to move along the guide groove by the rotation of the screw around a shaft, and the distance between the fixed bone fracture plate and the movable bone fracture plate is adjusted; the extension handle can be dismantled with the screw rod and be connected the setting, just the extension handle can the coaxial rotation of driving screw rod.

Furthermore, the screw rod is kept away from and still fixedly connected with a connecting piece on the end of fixed coaptation board, the connecting piece sets up with the screw rod is coaxial, the connecting piece has the connecting portion that sets up with extension handle phase-match on the other end of keeping away from the screw rod towards the one end and the screw rod fixed connection of screw rod, the extension handle with connecting portion can dismantle the connection setting.

Furthermore, the connecting part of the connecting piece and the end part of the extension handle facing the connecting piece are respectively provided with one of an inner hexagonal groove and an outer hexagonal lug which are matched with each other.

Furthermore, the connecting part of the connecting piece and the end part of the extension handle facing the connecting piece are respectively provided with one of a screw hole and a screw rod which are matched with each other.

Furthermore, a through hole penetrating through the body along the radial direction is formed in the tail part, far away from the screw rod, of the extension handle.

Further, the extension handle has a flat position thereon.

Furthermore, the fixed bone fracture plate and the movable bone fracture plate are arranged in a mirror image mode, three screw holes are formed in the fixed bone fracture plate and the movable bone fracture plate respectively, and the three screw holes in the fixed bone fracture plate and the three screw holes in the movable bone fracture plate are arranged in an equilateral triangle mode.

Compared with the prior art, the jaw traction fixing system provided by the utility model has the following advantages: the extension handle of the jaw traction fixing system and the jaw traction apparatus provided by the utility model adopt a detachable connection mode, and can be detached after the traction apparatus is extended for a desired distance, so that adverse events such as infection, traction apparatus convolution, looseness and the like caused by exposure of the extension rod during long-term fixing are avoided.

Drawings

Fig. 1 shows a schematic view of a jaw traction fixation system in one view.

Fig. 2 shows a schematic representation of the jaw traction fixing system in another view direction.

Fig. 3 shows a schematic cross-sectional view at a-a in fig. 2.

Fig. 4 shows an enlarged view at B in fig. 3.

Detailed Description

To further illustrate the various embodiments, the utility model provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the utility model and, together with the description, serve to explain the principles of the embodiments. Those skilled in the art will appreciate still other possible embodiments and advantages of the present invention with reference to these figures. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.

The utility model will now be further described with reference to the accompanying drawings and detailed description.

As shown in fig. 1 to 4, the present embodiment provides a jaw bone traction-fixing system including a jaw bone traction apparatus 1 and an extension handle 2.

Specifically, the jaw bone tractor 1 comprises a traction frame 10, a screw 11, a fixed bone fracture plate 12 and a movable bone fracture plate 13, wherein a cavity 100 arranged along the length direction of the traction frame 10 is arranged in the traction frame, and a guide groove 101 which is arranged along the length direction of the traction frame and is communicated with the cavity 100 is arranged on the outer wall of the traction frame; the screw 11 is installed in the cavity 100 and extends along the length direction of the traction frame 10, the fixed bone plate 12 is fixedly installed on the traction frame 10, the movable bone plate 13 is provided with a guide portion 130 extending into the cavity 100 from the guide groove 101, the guide portion 130 penetrates through the screw 11 and is matched with the screw 11, so that the movable bone plate 13 can be driven to move along the guide groove 101 by the rotation of the screw 11 around the shaft, and the distance between the fixed bone plate 12 and the movable bone plate 13 can be adjusted.

The extension handle 2 comprises a handle body 20 and an inner core 21 positioned in the handle body 20, the inner core 21 and the screw rod 11 are coaxially arranged, and the inner core 21 or the handle body and the screw rod 11 are detachably connected to enable the extension handle 2 to drive the screw rod 11 to coaxially rotate, so that the distance between the fixed bone plate 12 and the movable bone plate 13 is adjusted to achieve traction of the lower jaw, the extension handle can be detached after the tractor is spread for a desired distance, and adverse events such as infection, traction turning, loosening and the like caused by exposure of the extension handle 2 in long-term fixation are avoided.

In this embodiment, a connecting member 3 is further fixedly connected to the end of the screw 11 far from the fixed bone plate 12, the connecting member 3 is coaxially disposed with the screw 11, one end of the connecting member 3 facing the screw 11 is fixedly connected to the screw 11 through a pin 31, the other end far from the screw 11 is provided with a connecting portion 30 disposed to match with the inner core of the extension handle 2, the inner core 21 is detachably connected to the connecting portion 30, so that the extension handle 2 can drive the screw 11 to coaxially rotate, and further the distance between the fixed bone plate 12 and the movable bone plate 13 is adjusted to achieve traction of the lower jaw, and the lower jaw can be removed after the tractor is spread by a desired distance.

In this embodiment, the connecting portion 30 of the connecting member 3 may be an inner hexagonal groove, the head of the inner core 21 may be an outer hexagonal projection matched with the inner hexagonal groove, the outer hexagonal projection extends into the inner hexagonal groove to drive the connecting member 3 to rotate, and then the driving screw 11 rotates to drive the movable bone fracture plate 13 to move to adjust the distance between the fixed bone fracture plate 12 and the movable bone fracture plate 13, so as to achieve traction of the lower jaw.

Similarly, the connecting portion 30 of the connecting member 3 may also be an outer hexagonal protrusion, the handle 20 has an inner hexagonal recess matched with the outer hexagonal protrusion, the outer hexagonal protrusion extends into the inner hexagonal recess to drive the connecting member 3 to rotate, and then the driving screw 11 rotates to drive the movable bone plate 13 to move to adjust the distance between the fixed bone plate 12 and the movable bone plate 13, so as to achieve traction of the lower jaw.

In addition, the connection part 30 of the connection member 3 and the extension handle 2 can be detachably connected by screwing. For example, the connecting part 30 of the connecting member 3 is a screw hole or a screw rod arranged along the axis of the screw rod 11, the inner core of the extension handle 2 or the extension handle 2 is provided with a screw rod or a screw hole arranged corresponding to the screw rod, the screw rod is screwed on the screw hole, and then the screw rod 11 is driven to rotate to drive the movable bone fracture plate 13 to move to adjust the distance between the fixed bone fracture plate 12 and the movable bone fracture plate 13, so that the traction of the lower jaw is realized.

In this embodiment, the tail of the extension handle 2, which is far from the screw rod, is provided with a through hole 22 which radially penetrates through the handle body 20, and the through hole 22 can be used for temporary fixation to reduce the convolution of the tractor, so that the traction process is more accurate and effective.

In this embodiment, the shank 20 has a flattened portion 23 thereon, and the flattened portion 23 in this embodiment is formed by cutting the shank 20 from a generally cylindrical shape to facilitate confirmation of the distance of rotation during the procedure.

In this embodiment, fixed coaptation board 12 and the setting of 13 mirror images of activity coaptation board to all set up respectively on fixed coaptation board 12 and the activity coaptation board 13 by three screw holes, three screw holes on fixed coaptation board 12 and the activity coaptation board 13 are nearly equilateral triangle and arrange, in order to let fixed more stable.

While the utility model has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. A jaw traction fixation system characterized by: the jaw bone tractor comprises a jaw bone tractor and an extension handle, wherein the jaw bone tractor comprises a traction frame, a screw, a fixed bone fracture plate and a movable bone fracture plate, a cavity is formed in the traction frame along the length direction of the traction frame, a guide groove which is formed in the outer wall of the traction frame along the length direction of the traction frame and communicated with the cavity is formed in the outer wall of the traction frame, the screw is installed in the cavity and extends along the length direction of the traction frame, the fixed bone fracture plate is fixedly installed on the traction frame, the movable bone fracture plate is provided with a guide part which extends into the cavity from the guide groove, the guide part is arranged on the screw in a penetrating mode and is matched with the screw, so that the movable bone fracture plate can be driven to move along the guide groove by the rotation of the screw around a shaft, and then the distance between the fixed bone fracture plate and the movable bone fracture plate is adjusted; the extension handle can be dismantled with the screw rod and be connected the setting, just the extension handle can the coaxial rotation of driving screw rod.

2. A jaw traction fixation system as claimed in claim 1, wherein: the screw rod is kept away from and still fixedly connected with a connecting piece on the end of fixed coaptation board, the connecting piece sets up with the screw rod is coaxial, the connecting piece has the connecting portion that sets up with extension handle phase-match on the other end of keeping away from the screw rod towards the one end and the screw rod fixed connection of screw rod, the extension handle with connecting portion can dismantle the connection setting.

3. A jaw traction fixation system as claimed in claim 2, wherein: the connecting part of the connecting piece and the end part of the extension handle facing the connecting piece are respectively provided with one of an inner hexagonal groove and an outer hexagonal lug which are matched with each other.

4. A jaw traction fixation system as claimed in claim 2, wherein: the connecting part of the connecting piece and the end part of the extension handle facing the connecting piece are respectively provided with one of a screw hole and a screw rod which are matched with each other.

5. A jaw traction fixation system as claimed in claim 1, wherein: the tail part of the extension handle, which is far away from the screw rod, is provided with a through hole which radially penetrates through the body of the extension handle.

6. A jaw traction fixation system as claimed in claim 1, wherein: the extension handle has a flat position thereon.

7. A jaw traction fixation system as claimed in claim 1, wherein: the fixed bone fracture plate and the movable bone fracture plate are arranged in a mirror image mode, three screw holes are formed in the fixed bone fracture plate and the movable bone fracture plate respectively, and the three screw holes in the fixed bone fracture plate and the three screw holes in the movable bone fracture plate are arranged in an equilateral triangle mode.