A retractor for oral and maxillofacial surgery

Abstract

The present invention provides a retractor for oral and maxillofacial surgery, belonging to the technical field of retractors for opening surgical wounds. It includes a traction skeleton, on both sides of which traction hooks are installed. On both sides of the traction skeleton, second inserts are installed. At the top of the second insert, a connection block is fixedly connected, and at the top of the connection block, an end block is fixedly connected. A first recess is formed on the traction skeleton; a soft tissue traction assistance mechanism, which is used to assist in soft tissue surgical operations. By setting the soft tissue traction assistance mechanism and using the cooperation of the traction skeleton and the traction hooks, when the wound is opened, the patient's lips, upper jaw, and lower jaw can be well supported, and the force is relatively uniform, so that the patient will not have a strong sense of discomfort, and further enables the surgical wounds of maxillofacial fractures and soft tissue injuries to open better.

Description

Technical Field

[0001] The present invention relates to the technical field of retractors for opening surgical wounds, and particularly relates to a retractor for oral and maxillofacial surgery. Background Art

[0002] Oral and maxillofacial surgery is a discipline mainly focused on surgical treatment, with the prevention and treatment of diseases related to oral organs, facial soft tissues, maxillofacial bones, temporomandibular joints, salivary glands, and certain parts of the neck as its main content. As a medical specialty, it has dual attributes. It is not only an important part of stomatology but also an important branch of clinical medicine. Therefore, medical devices used in both stomatology and surgery are utilized in oral and maxillofacial surgery.

[0003] For the repair of maxillofacial fractures and soft tissue injuries, surgical instruments are required to expose the wound to increase the operable space for the surgery and facilitate the operation of medical staff. However, the existing instruments for opening the surgical wounds of maxillofacial fractures and soft tissue injuries generally use surgical retractors to open the incision. In general, surgical retractors can be used to expose the surgical field, fix soft tissues, reduce tissue damage, and assist in surgical operations. However, for the repair of maxillofacial fractures and soft tissue injuries, they have certain limitations. For example, when opening the patient's lip, since the retractor can only pull one side of the patient's upper lip or lower lip, the pulling force on the lip is concentrated at a point near the retractor, causing discomfort to the patient, and it is also difficult to fully expose the wound field, thus facilitating the repair of maxillofacial fractures and soft tissue injuries. Therefore, the present application provides a retractor for oral and maxillofacial surgery to meet the requirements. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a retractor for oral and maxillofacial surgery. By setting up a soft tissue traction assistance mechanism and using the cooperation of a traction skeleton and a traction retractor, when opening the wound, the patient's lips, upper jaw, and lower jaw can be well supported, and the force is relatively uniform, so that the patient will not have a strong sense of discomfort, and it also further enables the surgical wound of maxillofacial fractures and soft tissue injuries to open better. Through the above settings, the problems that the existing device cannot well expose the surgical field and cause a strong sense of discomfort to the patient when opening the wound can be solved.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A retractor for oral and maxillofacial surgery, comprising a traction framework, traction hooks are installed on both sides of the traction framework, second inserts are installed on both sides of the traction framework, a connection block is fixedly connected to the top of the second insert, an end block is fixedly connected to the top of the connection block, and a first recess is provided on the traction framework; a soft tissue traction assisting mechanism for assisting soft tissue surgical operations, and the soft tissue traction assisting mechanism is connected to the traction framework.

[0007] Optionally, second slots adapted to the second inserts are provided on both sides of the traction framework, first slots are provided at the top and bottom of the traction framework, and limiting slots adapted to the shape of the connection block are provided on both sides of the traction framework.

[0008] Optionally, a mounting groove is provided on the traction hook, the side of the mounting groove close to the end block is narrower, and the side of the mounting groove far from the end block is wider.

[0009] Optionally, a lightweight groove is provided on the traction hook, and a soft tissue pressing piece is fixedly connected to the side of the traction hook close to the end block.

[0010] Optionally, a third weakening part is provided on the soft tissue pressing piece, and a second recess is provided on the soft tissue pressing piece.

[0011] Optionally, the connection block, the end block and the second insert are integrally formed, and the connection block, the end block and the second insert are all made of plastic material.

[0012] Optionally, a buffer cavity is provided in the end block, and a second weakening part is provided on the second insert.

[0013] Optionally, the soft tissue traction assisting mechanism includes a first insert installed on the traction framework, a connection piece is fixedly connected to one side of the first insert, and a limiting piece is fixedly connected to the side of the connection piece far from the first insert.

[0014] Optionally, the shape of the first insert is adapted to the shape of the first slot, and the structure formed by the first insert, the connection piece and the limiting piece is concave.

[0015] Optionally, a fourth weakening part is provided on the connection piece, and the outer wall edges of the first insert, the connection piece and the limiting piece are all arc-shaped.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above solution, by setting up a soft tissue traction assisting mechanism, not only can the traction framework be unfolded when pulling the traction hook, so that the upper and lower lips, the upper jaw and the lower jaw of the patient are opened, thus well exposing the soft tissue surgical opening, but also when using the traction framework in cooperation with the traction hook to open the wound, the lips, the upper jaw and the lower jaw of the patient are well supported and the force is relatively uniform, so that the patient will not have a strong sense of discomfort. And during the surgical operation, by using the soft tissue traction assisting mechanism in cooperation with other structures in the device, the surgical wound of maxillofacial fracture and soft tissue injury can be better opened and kept in a stable open state during the operation, thus facilitating the operation and use of this surgical treatment. Moreover, the structure of this device is simple and convenient to use.

[0018] By providing a second slot and a limiting slot in the device, not only can the second insert be easily installed in the second slot, so that the connecting block at the top of the second insert is quickly connected to the traction framework, but also the bottom of the connecting block can be easily clamped in the limiting slot opened, thus further increasing the connection stability between the traction framework and the connecting block. And the cooperation between the structures effectively makes the use effect of the device better, and the structure is simple and convenient to use.

[0019] By providing a mounting groove and a lightweight groove in the device, not only can the connecting block be installed in the mounting groove so that the connecting block and the traction hook are used together, but also one side of the mounting groove close to the end block is narrower and the other side away from the end block is wider, which further facilitates the installation of the connecting block. And a lightweight groove is provided on the traction hook to reduce the mass of the traction hook, and it is convenient to fix the side of the traction hook away from the traction framework on the frame of the operating table. Moreover, the opening of the lightweight groove also increases the anti-slip property of the outer wall of the traction hook, thus facilitating the operation by medical staff. And the cooperation between the structures effectively makes the use effect of the device better, and the structure is simple and convenient to use.

[0020] By providing a first insert, a connecting piece and a limiting piece in the soft tissue traction assisting mechanism, not only can the first insert be installed in the first slot, so that the first insert, the connecting piece and the limiting piece on it can be quickly installed on the traction framework for use, but also the integrated structure formed by the first insert, the connecting piece and the limiting piece is arranged at the upper jaw and the lower jaw of the patient, making the teeth and oral mucosa contact with the connecting piece. Thus, when the traction framework expands, the cooperation between the above structures can better expose the soft tissue surgical wound of the patient, thus facilitating the surgical operation. And the first insert, the connecting piece and the limiting piece are of an integrated structure, and the stability of the integrated structure is good. The cooperation between the structures effectively makes the use effect of the soft tissue traction assisting mechanism better, and the structure is simple and convenient to use.

[0021] By providing a fourth weakening portion within the soft tissue traction assisting mechanism, not only can the deformation ability of the connecting piece be enhanced, enabling the connecting piece to deform first from the fourth weakening portion under the action of an external force, so that the first insertion piece, the connecting piece, and the limiting piece can better fit the soft tissue of the patient's oral cavity, but also the cooperation between the structures effectively improves the use effect of the soft tissue traction assisting mechanism, and the structure is simple and convenient to use.

[0022] In summary, when the device is used in cooperation with the soft tissue traction assisting mechanism and each component within the device, the device can quickly and stably open the soft tissue wound, and while opening the surgical wound, the force on the patient's lips, upper jaw, and lower jaw is relatively uniform, reducing the discomfort of the patient during the operation. Moreover, the structure of the device is simple, convenient and fast to use, the production cost of the device is low, and the practicability is good, which is convenient for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present invention and, together with the specification, are further used to explain the principles of the present invention and enable those skilled in the relevant art to implement and use the present invention.

[0024] Figure 1 Schematic perspective structure diagram of a retractor for oral and maxillofacial surgery;

[0025] Figure 2 Schematic perspective sectional structure diagram of a traction framework;

[0026] Figure 3 For Figure 2 Enlarged structure diagram at position A in

[0027] Figure 4 Schematic perspective sectional structure diagram of the cooperation between an end block and a connecting block;

[0028] Figure 5 Schematic perspective structure diagram of a traction hook;

[0029] Figure 6 Schematic first perspective structure diagram of a traction hook;

[0030] Figure 7 Schematic first perspective structure diagram of a retractor for oral and maxillofacial surgery;

[0031] Figure 8 Schematic second perspective structure diagram of a traction hook;

[0032] Figure 9 For Figure 8 Enlarged structure diagram at position B in

[0033] Figure 10Schematic diagram of the second perspective structure of the retractor for oral and maxillofacial surgery;

[0034] Figure 11 It is Figure 10 The enlarged structure diagram at position C in

[0035] Figure 12 Schematic diagram of the three-dimensional unfolded structure of the traction skeleton and the first insert;

[0036] Figure 13 It is Figure 12 The enlarged structure diagram at position D in

[0037] Figure 14 Schematic diagram of the three-dimensional structure of the cooperation between the first insert and the limit piece.

[0038] Reference numerals:

[0039] 1. Traction skeleton; 2. Connecting block; 3. End block; 4. Traction hook; 5. First insert; 6. Connecting piece; 7. Limit piece; 8. First concave part; 9. First slot; 10. Second slot; 11. First weakening part; 12. Buffer cavity; 13. Second insert; 14. Second weakening part; 15. Soft tissue pressing piece; 16. Installation groove; 17. Lightweight groove; 18. Third weakening part; 19. Second concave part; 20. Fourth weakening part; 21. Limit groove; 22. Fifth weakening part.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0041] The following describes in detail a retractor for oral and maxillofacial surgery provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also adopt other alternative methods for implementation; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0042] It should be pointed out that in the specification, it is mentioned that "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. indicate that the described embodiments may include specific features, structures or characteristics, but not necessarily every embodiment includes this specific feature, structure or characteristic. In addition, when combining embodiments to describe specific features, structures or characteristics, it should be within the knowledge range of those skilled in the relevant art whether other embodiments are explicitly described to achieve such features, structures or characteristics.

[0043] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for the presence of other factors that are not necessarily expressly described.

[0044] It will be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0045] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience in description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted accordingly.

[0046] Such as Figures 1 to 3 and Figure 7As shown, an embodiment of the present invention provides a retractor for oral and maxillofacial surgery, which includes a traction framework 1. Traction hooks 4 are installed on both sides of the traction framework 1. Second inserts 13 are installed on both sides of the traction framework 1. A connection block 2 is fixedly connected to the top of the second insert 13, and an end block 3 is fixedly connected to the top of the connection block 2; a soft tissue traction assistance mechanism, which is used to assist in soft tissue surgical operations. The soft tissue traction assistance mechanism is connected to the traction framework 1. The shape of the traction framework 1 is adapted to the shape of the patient's lips and can be well used to open the patient's upper lip and lower lip. The traction framework 1 presents a semi-open state without external force. At this time, the opening size is adapted to the natural opening size and shape of the patient's upper and lower lips. After the patient's mouth is slightly opened, the traction framework 1 is placed in the patient's mouth, and then the traction hook 4 is pulled to expand the traction framework 1, so as to open the patient's upper and lower lips, as well as the upper jaw and lower jaw, thus well exposing the soft tissue surgical opening. And when using the traction framework 1 in cooperation with the traction hook 4 to open the wound, the patient's lips, upper jaw and lower jaw are well supported and the force is relatively uniform, so that the patient will not have a strong sense of discomfort.

[0047] Moreover, by using the connection block 2, the end block 3 and the second insert 13, the traction framework 1 and the traction hook 4 can be quickly connected and used together, so as to completely open the surgical wounds of maxillofacial fractures and soft tissue injuries by using the cooperation of the traction framework 1 and the traction hook 4, thus facilitating the surgical operation of the surgery. And during the surgical operation, by using the cooperation of the soft tissue traction assistance mechanism and other structures in the device, the surgical wounds of maxillofacial fractures and soft tissue injuries can be better opened and maintained in a stable open state during the surgery, which is conducive to the operation and use of this surgical treatment. And the structure of this device is simple, easy to use, and the production cost of the device is relatively low, which is convenient for popularization and use.

[0048] Furthermore, second slots 10 adapted to the second inserts 13 are provided on both sides of the traction frame 1. First slots 9 are provided at the top and bottom of the traction frame 1. Limiting slots 21 adapted to the shape of the connecting blocks 2 are provided on both sides of the traction frame 1. The openings of the first slots 9 face the outside of the traction frame 1, and the openings of the second slots 10 and the limiting slots 21 face the inside of the traction frame 1. The first slots 9, the second slots 10, and the limiting slots 21 are all non-through. The opening of the second slot 10 facilitates the installation of the second insert 13 therein, so that the connecting block 2 at the top of the second insert 13 can be quickly connected to the traction frame 1. The provided limiting slots 21 facilitate the bottom of the connecting block 2 to be clamped therein, thereby further increasing the connection stability between the traction frame 1 and the connecting block 2. The provided first slots 9 facilitate the installation of other auxiliary structures in the device. A first recess 8 is provided on the traction frame 1, which can form a semi-wrap around the patient's lips when the traction frame 1 is in use, thereby making the use comfort of the device better. The above structure is relatively simple, and the cooperation between the structures further makes the use effect of the device better and the practicability of the device better. First weakening portions 11 are provided on both sides of the traction frame 1, and fifth weakening portions 22 are provided at the top and bottom of the traction frame 1. The setting of the first weakening portions 11 and the fifth weakening portions 22 can make the traction frame 1 have better deformation ability, so that the traction frame 1 can deform first from the first weakening portions 11 and the fifth weakening portions 22 under the action of external force.

[0049] As Figure 1 and Figures 4 to 11 shown, an installation slot 16 is provided on the traction hook 4 for installing the connecting block 2 in the installation slot 16, so that the connecting block 2 and the traction hook 4 are used together. One side of the installation slot 16 close to the end block 3 is narrower, and the side of the installation slot 16 away from the end block 3 is wider, which further facilitates the installation of the connecting block 2. During installation, insert the end block 3 from the wider side of the installation slot 16, and then move the connecting block 2 and the end block 3 towards the narrower side of the installation slot 16. A lightweight slot 17 is provided on the traction hook 4, which reduces the mass of the traction hook 4, and facilitates fixing the side of the traction hook 4 away from the traction frame 1 on the frame of the operating table. The opening of the lightweight slot 17 also increases the anti-slip property of the outer wall of the traction hook 4, thereby facilitating the operation by medical staff.

[0050] One side of the traction hook 4 close to the end block 3 is fixedly connected with a soft tissue pressing piece 15, which is convenient for the one side end of the traction hook 4 to hook the soft tissue of the patient. The soft tissue pressing piece 15 is provided with a third weakening part 18, so that the connection part between the traction hook 4 and the soft tissue pressing piece 15 has a certain deformation ability, so as to better use the soft tissue pressing piece 15 to limit the soft tissue of the patient. The soft tissue pressing piece 15 is provided with a second concave part 19. Through the setting of the second concave part 19, the side of the soft tissue pressing piece 15 close to the patient's soft tissue is arc-shaped, thus preventing the patient from feeling uncomfortable when the edge of the soft tissue pressing piece 15 directly contacts the soft tissue when contacting the patient. And the setting of the second concave part 19 can make the outer wall of the side of the soft tissue pressing piece 15 close to the patient's soft tissue better fit the soft tissue part of the patient. And the above structure is relatively simple, and it is also more convenient to use and operate. The combined use of the structures further makes the use effect of the device better.

[0051] Furthermore, the connecting block 2, the end block 3 and the second inserting piece 13 are integrally formed. The integral structure has better stability. The connecting block 2, the end block 3 and the second inserting piece 13 are all made of plastic material. The plastic material has good deformation ability, which is convenient for the device to expand elastically to a certain extent when it is unfolded and used. A buffer cavity 12 is opened in the end block 3. By using the opened buffer cavity 12, the end block 3 can have better deformation ability, so that the connecting block 2 and the end block 3 can be quickly installed in the installation groove 16. The second inserting piece 13 is provided with a second weakening part 14. Through the setting of the second weakening part 14, the deformation ability of the second inserting piece 13 can be better, so that the second inserting piece 13 deforms first from the second weakening part 14 under the action of external force. The combined use of the above structures further makes the use effect of the device better and increases the practicality of the device.

[0052] As Figure 1 、 Figure 2 、 Figure 7 and Figures 12 to 14 shown, the soft tissue traction assisting mechanism includes a first inserting piece 5 installed on the traction skeleton 1. One side of the first inserting piece 5 is fixedly connected with a connecting piece 6. The side of the connecting piece 6 far from the first inserting piece 5 is fixedly connected with a limiting piece 7. As Figure 14The cross-section of the shown first insert piece 5 is concave. The first insert piece 5, the connecting piece 6, and the limiting piece 7 are of an integral structure, and the stability of the integral structure is relatively good. By installing the first insert piece 5 in the first slot 9, the first insert piece 5 and the connecting piece 6 and the limiting piece 7 thereon can be quickly installed on the traction skeleton 1 for use. The integral structure formed by the first insert piece 5, the connecting piece 6, and the limiting piece 7 is arranged at the upper jaw and the lower jaw of the patient, and the teeth and the oral mucosa are in contact with the connecting piece 6. Thus, when the traction skeleton 1 expands, the cooperation between the above structures can better expose the soft tissue hand wound of the patient, thereby facilitating the surgical operation. Moreover, the structure is simple, and the cooperation between the structures further makes the use effect of the device better.

[0053] Furthermore, the shape of the first insert piece 5 is adapted to the shape of the first slot 9, which can make the first insert piece 5 more stably installed in the first slot 9. The structure formed by the first insert piece 5, the connecting piece 6, and the limiting piece 7 is concave, which can better adapt to the contours of the upper jaw and the lower jaw of the patient's mouth. A fourth weakening part 20 is provided on the connecting piece 6, which enhances the deformation ability of the connecting piece 6, so that the connecting piece 6 deforms first from the fourth weakening part 20 under the action of external force. Thus, the first insert piece 5, the connecting piece 6, and the limiting piece 7 can better fit the soft tissue of the patient's mouth. The outer wall edges of the first insert piece 5, the connecting piece 6, and the limiting piece 7 are all arc-shaped, and the arc has no obvious sharp corners, preventing the problem that the first insert piece 5, the connecting piece 6, and the limiting piece 7 accidentally scratch the patient during use. And the above structure is relatively simple, and the cooperation between the structures further makes the use effect of the soft tissue traction auxiliary mechanism better, thereby making the device more practical.

[0054] The working principle of the technical solution provided by the present invention is as follows:

[0055] First, insert the end block 3 from the wider side of the installation groove 16. By using the arc-shaped guiding on the outer wall of the end block 3 and the certain deformation generated when the buffer cavity 12 is squeezed, the end block 3 is quickly inserted into the installation groove 16, so that the connecting block 2 is inserted into the installation groove 16, and the end block 3 limits the end of the connecting block 2. Then move the connecting block 2 and the end block 3 to the narrower side of the installation groove 16 to further prevent the connecting block 2 from slipping out of the installation groove 16 during use. After connecting the connecting block 2 and the traction hook 4, insert the second insert piece 13 at the bottom of the connecting block 2 into the second slot 10, and make the bottom of the connecting block 2 be stuck in the limiting groove 21. Then insert the first insert piece 5 into the first slot 9. Among them, the traction hooks 4 can be two or four for combined use, and specifically, the corresponding number can be installed according to the on-site use situation to complete the installation connection between the structures.

[0056] Then, let the patient open their mouth slightly. Since the initial shape of the traction framework 1 is adapted to the slightly open shape of the patient's lips, place the traction framework 1 in the patient's mouth. The first recess 8 enables the traction framework 1 to semi-wrap the patient's lips. Then, pull the traction hook 4 to expand the traction framework 1. Subsequently, fix the side of the traction hook 4 away from the soft tissue pressing piece 15 on an existing clamping bracket or have a medical staff hold the traction hook 4 to maintain the expanded state of the traction framework 1. The clamping bracket is an existing mature technology, and its specific structure and working principle will not be elaborated here in detail. The fixing method of the traction hook 4 is not limited herein. Use the traction framework 1 and the traction hook 4 to open the upper and lower lips, as well as the upper jaw and lower jaw of the patient, so as to well expose the soft tissue surgical opening. When using the traction framework 1 in cooperation with the traction hook 4 to open the wound, arrange the integrated structure formed by the first insert piece 5, the connecting piece 6, and the limiting piece 7 at the upper jaw and lower jaw of the patient, and make the teeth and oral mucosa contact the connecting piece 6. The connecting piece 6 is provided with a fourth weakening portion 20, so that the connecting piece 6 deforms first from the fourth weakening portion 20 under the action of an external force, so that the first insert piece 5, the connecting piece 6, and the limiting piece 7 can better fit the soft tissue of the patient's mouth. Thus, when the device is used for the operation of opening the soft tissue surgical wound, the patient's lips, as well as the upper jaw and lower jaw, can be well supported and the force is relatively uniform, so that the patient will not have a strong sense of discomfort. Moreover, the structure of the device is relatively simple, and the cooperation between the structures further makes the use effect of the device better.

[0057] The present invention covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details are elaborated in the following preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention even without the description of these details. Additionally, well-known methods, processes, procedures, components, and circuits are not elaborated in detail to avoid unnecessary confusion to the essence of the present invention.

[0058] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A retractor for oral and maxillofacial surgery, characterized in that, It includes a traction skeleton, traction hooks are installed on both sides of the traction skeleton, second inserts are installed on both sides of the traction skeleton, a connection block is fixedly connected to the top of the second insert, an end block is fixedly connected to the top of the connection block, and a first recess is formed on the traction skeleton; A soft tissue traction assisting mechanism, which is used to assist soft tissue surgical operations and is connected to the traction skeleton; Wherein, second slots adapted to the second inserts are formed on both sides of the traction skeleton, first slots are formed on the top and bottom of the traction skeleton, and limiting slots adapted to the shape of the connection block are formed on both sides of the traction skeleton; An installation groove is formed on the traction hook, and the connection block can be installed in the installation groove to connect the traction hook and the connection block. A soft tissue pressing piece is fixedly connected to one side of the traction hook close to the end block; The soft tissue traction assisting mechanism includes a first insert installed on the traction skeleton, the shape of the first insert is adapted to the shape of the first slot, a connection piece is fixedly connected to one side of the first insert, and a limiting piece is fixedly connected to one side of the connection piece away from the first insert.

2. The retractor for oral and maxillofacial surgery according to claim 1, wherein, One side of the installation groove close to the end block is narrower, and the side of the installation groove away from the end block is wider.

3. The tractor for oral and maxillofacial surgery according to claim 1, wherein A lightweight groove is formed on the traction hook.

4. The tractor for oral and maxillofacial surgery according to claim 1, characterized in that A third weakening part is provided on the soft tissue pressing piece, and a second recess is provided on the soft tissue pressing piece.

5. The tractor for oral and maxillofacial surgery according to claim 1, wherein The connection block, the end block and the second insert are integrally formed, and the connection block, the end block and the second insert are all made of plastic materials.

6. The tractor for oral and maxillofacial surgery according to claim 1, wherein A buffer cavity is formed in the end block, and a second weakening part is formed on the second insert.

7. The tractor for oral and maxillofacial surgery according to claim 1, wherein, The structure formed by the first insert, the connection piece and the limiting piece is concave.

8. The retractor for oral and maxillofacial surgery according to claim 1, wherein, A fourth weakening part is formed on the connection piece, and the outer wall edges of the first insert, the connection piece and the limiting piece are all arc-shaped.

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