Tumor excision device for oral and maxillofacial surgery

Abstract

The invention belongs to the technical field of medical instruments, and discloses an oral and maxillofacial surgery tumor resection device, a driving assembly comprises a screw rod rotationally connected with a base, the base is provided with a motor, the screw rod is in threaded connection with a pair of nuts with opposite rotating directions, the nuts are in sliding connection with the base, and a mouth distraction piece is connected with the nuts; the screw is connected with a straight gear, the base is connected with a first straight rack and a second straight rack, the first straight rack is connected with a traction piece, and the second straight rack is connected with an ejection piece. The ejection piece and the traction piece are driven by the nuts with opposite rotating directions to move in opposite directions, the mouth of a patient is opened, and the operation view is exposed; the gear and the rack are used for driving the traction piece and the ejection piece to inwards eject the cheeks of a patient and meanwhile, the mouth corners are pulled outwards, so that the visual field is fully exposed, support is provided for the cheeks, operation of a doctor is facilitated, crowding of people around an operating table is avoided, and the stable and clear operation visual field can be continuously provided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a tumor resection device for oral and maxillofacial surgery. BACKGROUND

[0002] In the field of oral and maxillofacial surgery, tumor resection surgery is the core means for treating various types of maxillofacial tumors. Oral and maxillofacial malignant tumors are mainly cancer, more than 80% of which are squamous cell carcinoma, followed by adenocarcinoma and other epithelial cancers. Although current treatment methods are showing a trend of diversification, including radiotherapy, chemotherapy, immunotherapy, etc., surgical resection is still the most direct and effective method to achieve tumor radicalization.

[0003] Oral and maxillofacial tumor resection surgery, especially for tumors occurring in soft tissues such as the cheek, tongue, and floor of the mouth, is an extremely delicate and complex surgical operation. The core is to follow the "no tumor principle", that is, through whole block resection, the tumor and a certain range of normal tissue (safety margin) around it are removed together to ensure complete removal of the lesion and reduce the risk of postoperative recurrence. The surgical procedure usually involves multiple precise steps such as mucosal incision, tissue separation, lesion resection, wound hemostasis, intraoperative frozen pathological examination (to ensure negative margins), and final defect reconstruction. During this process, various instruments such as surgical knives, electric knives, retractors, suction devices, and hemostatic forceps need to be used in coordination.

[0004] Current resection surgery relies heavily on the assistance of multiple assistants, for example, assistants need to hold retractors to expose the surgical field, hold suction devices to remove blood and smoke, and be responsible for irrigation and cooling. This not only leads to crowding around the operating table, but also makes it difficult to avoid slight shaking, fatigue, and coordination problems, making it difficult to continuously provide a stable and clear surgical field. In addition, when resecting tumors near the cheek (buccal region), since this area is composed of mucosa, buccal muscle, fat pad, and skin, lacking bony support, the tissue is soft and elastic, and when the surgical knife is cut, the soft tissue is easily moved and deformed, greatly increasing the difficulty of the operation and affecting the completeness of the resection. SUMMARY

[0005] The present application aims to provide a tumor resection device for oral and maxillofacial surgery, which uses nuts with opposite rotation to drive the ejector and the puller to move in opposite directions, to open the patient's mouth and expose the surgical field. The use of intermeshing gears and racks drives the puller and ejector to move in opposite directions, which not only exposes the surgical field by pulling the corners of the mouth outward while pushing the cheeks inward, but also provides support for the cheeks, making it easier for the doctor to operate. This avoids crowding around the operating table and can continuously provide a stable and clear surgical field. The problems in the background art are solved.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] The oral and maxillofacial surgery tumor resection device comprises a base, a driving assembly and a pair of mouth opening members connected to the base; the driving assembly comprises a screw rod rotationally connected to the base, a motor connected to the base to drive the screw rod to rotate, a pair of nuts with opposite rotation directions threadedly connected to the screw rod, and the nuts are slidably connected to the base along the axial direction of the screw rod, the screw rod rotates, and the two nuts move linearly along the axial direction of the screw rod in opposite directions; and the pair of mouth opening members are respectively connected to the two nuts; the screw rod is coaxially connected with a spur gear, the base is slidably connected with a first spur rack and a second spur rack, and the first spur rack and the second spur rack are both engaged with the spur gear, one end of the first spur rack close to the mouth opening member is connected with a pulling member, and one end of the second spur rack close to the mouth opening member is connected with an ejection member.

[0008] Further, one side of the base close to the second spur rack is connected with a pump, the second spur rack is connected with a push plate, and the push plate is connected with a pump rod of the pump; one side of the ejection member away from the second spur rack is provided with a plurality of air bag protrusions, the ejection member is internally provided with a gas channel in communication with the air bag protrusions, and an air outlet end of the pump is in communication with the gas channel.

[0009] Further, the gas channel comprises a main flow channel and a plurality of branch flow channels, one end of the main flow channel is in communication with the plurality of branch flow channels respectively, the other end of the main flow channel is in communication with the air outlet end of the pump through a gas guide pipe, the branch flow channels correspond to the air bag protrusions one by one, and one end of the branch flow channel away from the main flow channel is in communication with the air bag protrusion.

[0010] Further, the base comprises a fixed plate, the fixed plate is connected with a height adjusting assembly, and a free end of the height adjusting assembly is connected with a mounting shell; the screw rod, the nuts, the first spur rack and the second spur rack are all arranged in the mounting shell.

[0011] Further, the height adjusting assembly comprises an internally threaded pipe, the two ends of the internally threaded pipe are threadedly connected with externally threaded rods with opposite rotation directions, one of the externally threaded rods is connected with the fixed plate, and the other externally threaded rod is connected with the mounting shell.

[0012] Further, the mounting shell is provided with a sliding groove along the length direction, the nut is connected with a sliding block, and the sliding block is slidably connected in the sliding groove; one side of the mounting shell is provided with a through groove extending along the length direction, the nut is connected with a connecting rod, a free end of the connecting rod passes through the through groove and is connected with the mouth opening member; the width of the through groove is matched with the diameter of the connecting rod.

[0013] Further, the mouth expander is an arc-shaped piece, and the mouth expander is provided with tooth grooves for supporting teeth; the inner wall of the tooth groove is connected with a flexible pad; and one side wall of the tooth groove is connected with a lip support plate.

[0014] Further, the second straight rack and the ejection piece are connected through a position adjusting assembly, the position adjusting assembly comprises a threaded sleeve and an adjusting threaded rod connected through threads, the free end of the adjusting threaded rod is connected with the second straight rack, the free end of the threaded sleeve is rotatably connected with a sleeve pipe, the threaded sleeve is provided with a limiting piece for limiting the rotation of the sleeve pipe, and the ejection piece is connected with the sleeve pipe.

[0015] Further, the pulling piece is a hook or a clamping piece made of elastic material.

[0016] Further, the base is further connected with a liquid suction pump, the suction end of the liquid suction pump is connected with a suction pipe, and the suction pipe is detachably connected with the pulling piece.

[0017] The principle and beneficial effects of the technical scheme are as follows:

[0018] 1. The oral and maxillofacial surgery tumor resection device provided by the application comprises a pair of mouth opening members in the shape of a mouth, which are used to open the mouth of a patient to facilitate the operation of medical staff; an ejection member is used to eject the cheeks of the patient towards the middle of the oral cavity, increase the support force at the tumor site, and maximize the exposure of the tumor to increase the surgical field and facilitate the operation of the doctor; a base is rotationally connected with a screw rod, and a motor for driving the rotation of the screw rod is further arranged, the screw rod is threadedly connected with a pair of nuts with opposite rotation directions, and the nuts are axially slidably connected with the base along the screw rod; the motor drives the rotation of the screw rod, and under the limiting action of the base and the thread, the two nuts move linearly in opposite directions along the axial direction of the screw rod; and the two mouth opening members are connected with the nuts, that is, the rotation of the screw rod can open the mouth of the patient to increase the surgical field; in addition, the screw rod is coaxially connected with a spur gear, the base is slidably connected with a first and a second straight toothed rack engaged with the spur gear, the first straight toothed rack is connected with a pulling member, and the second straight toothed rack is connected with the ejection member; the rotation of the screw rod drives the rotation of the spur gear, the spur gear drives the first and second straight toothed racks to move in opposite directions, the second straight toothed rack drives the ejection member to eject the cheeks of the patient towards the middle of the oral cavity, at the same time, the first straight toothed rack drives the pulling member to pull the corners of the patient's mouth outward, further increasing the surgical field in the oral cavity and facilitating the operation of medical staff; therefore, the device of the application can open the mouth of the patient while ejecting the cheeks towards the middle of the oral cavity and pulling the corners of the mouth outward, without relying on the assistance of multiple assistants, avoiding the crowding of people around the operating table, and continuously providing a stable and clear surgical field; in addition, the ejection member can also provide support at the cheeks, avoiding the deformation of soft tissues during incision with a surgical knife, reducing the difficulty of the operation, making the tumor resection more complete, and increasing the efficiency and avoiding the delay of the disease.

[0019] 2. The oral and maxillofacial surgery tumor resection device provided by the present application, in order to increase the friction between the ejection element and the cheek and reduce the damage to the patient's cheek, a pump is connected to the side of the base close to the second straight rack, the second straight rack is connected to a push plate connected to the pump rod, and the side of the ejection element away from the second straight rack is provided with a plurality of air bag protrusions, and the inside of the ejection element is provided with a gas passage communicating the pump and the air bag protrusions, that is, the rotation of the screw rod drives the rotation of the straight gear, the straight gear drives the second straight rack to move towards the direction close to the patient's cheek, at the same time, the push plate of the second straight rack pushes the pump rod, so that the gas in the pump flows to the air bag protrusions through the gas flow passage, thereby causing the air bag protrusions to expand, the plurality of air bag protrusions abut against the patient's cheek, which can increase the friction and avoid secondary damage to the patient caused by the sliding of the ejection element during the operation. In addition, the flexible nature of the air bag can also reduce the pressure on the patient's cheek and avoid damaging the patient's cheek. In order to increase the uniformity of the air bag inflation, the gas passage is provided with a main flow channel and a plurality of branch flow channels in communication with each other, one end of the main flow channel away from the branch flow channel is in communication with the gas outlet end of the pump, and the other end of the branch flow channel away from the main flow channel is in communication with the air bag protrusion, so that the gas in the pump can flow uniformly to each branch flow channel through the main flow channel, so that each air bag protrusion can be inflated and expanded, avoiding local stress on the cheek.

[0020] 3. The oral and maxillofacial surgery tumor resection device provided by the present application, in order to increase the stability of the device, the fixing plate of the base is connected to the support member such as bed plate, table plate, operating table, etc. through connecting members such as bolts, pins, etc., which can fix the whole device; the fixing plate is connected with the mounting shell through the height adjusting assembly, the screw rod, the nut, the first straight rack and the second straight rack are all arranged in the mounting shell, which can avoid the damage to medical staff or patients; wherein the height adjusting assembly comprises an internally threaded pipe, the two ends of the internally threaded pipe are connected with externally threaded rods with opposite thread directions, one externally threaded rod is connected with the fixing plate, and the other externally threaded rod is connected with the mounting shell, by rotating the internally threaded pipe, the height of the mounting shell can be adjusted to adapt to patients of different body types, and the applicability is wide. In addition, the mounting shell is provided with a sliding groove along the length direction, the nut is connected with the sliding block slidingly connected in the sliding groove, which ensures the uniformity and stability of relative motion and improves the functionality and adjustment accuracy of the whole device; and a through groove extending along the length direction is formed in one side of the mounting shell, the connecting rod connected with the nut passes through the through groove and is connected with the mouth opening element, and the width of the through groove is matched with the diameter of the connecting rod, the through groove can limit the connecting rod to avoid shaking, which increases the uniformity and stability of relative motion.

[0021] 4. The oral and maxillofacial surgical tumor resection device provided by this invention includes a pair of arc-shaped mouth opening components, which are ergonomically designed to increase comfort. The mouth opening components have alveoli for supporting the teeth, which are placed within the alveoli to prevent movement during surgery and ensure surgical safety. To reduce pressure on the patient's teeth, flexible pads are connected to the inner walls of the alveoli. Furthermore, a lip support plate is connected to one side wall of the alveoli to support the patient's upper and lower lips, preventing the lips from interfering with the surgeon's field of vision. The traction component is a hook that can hook onto the corner of the patient's mouth to prevent slippage during traction. Alternatively, the traction component can be a clamping component made of elastic material, which can hold the corner of the patient's mouth to further prevent slippage and ensure operational safety. In addition, the base is equipped with a suction pump, and the suction end of the suction pump is connected to a suction tube. During the operation, the suction port of the suction tube is placed at the incision site to promptly suction out the oozing blood. The suction tube is detachably connected to the traction device, which can fix the suction tube at the corner of the mouth without the need for medical assistants to hold it. It can stably suction out oozing blood, which can avoid crowding around the operating table and provide a stable and clear surgical field of vision.

[0022] 5. The present invention provides an oral and maxillofacial surgical tumor resection device, wherein the second straight rack and the ejector are connected by a position adjustment assembly. The position adjustment assembly includes an internally threaded sleeve and an adjusting threaded rod connected by threads, which can adjust the distance of the ejector to adapt to tumors at different oral cavity depths; the internally threaded sleeve is rotatably connected to a sleeve, and the ejector is connected to the sleeve, which can adjust the angle of the ejector to adapt to different cheek curvatures, so that the ejector fits the face better and increases the contact area. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an oral and maxillofacial surgical tumor resection device according to the present invention;

[0024] Figure 2 This is a top view of an oral and maxillofacial surgical tumor resection device according to the present invention;

[0025] Figure 3 for Figure 2 Sectional view of AA;

[0026] Figure 4 for Figure 2 Sectional view of BB;

[0027] Figure 5 This is a side view of an oral and maxillofacial surgical tumor resection device according to the present invention.

[0028] The names of the corresponding labels in the attached diagram are:

[0029] 1, fixed plate; 2, outer threaded rod; 3, inner threaded tube; 4, mounting shell; 5, screw rod; 6, nut; 7, sliding groove; 8, sliding block; 9, mouth prop; 10, flexible pad; 11, lip support plate; 12, motor; 13, straight gear; 14, first straight rack; 15, second straight rack; 16, slide; 17, slide rail; 18, puller; 19, adjusting threaded rod; 20, inner threaded sleeve; 21, sleeve; 22, limiting piece; 23, ejector; 24, air bag protrusion; 25, air pump; 26, pumping rod; 27, air guide pipe; 28, main runner; 29, branch runner; 30, push plate; 31, strip-shaped opening; 32, liquid suction pump; 33, suction pipe; 34, connecting rod; 35, through slot. DETAILED DESCRIPTION

[0030] The application will be further described in conjunction with the drawings and embodiments:

[0031] As shown in the drawings, Figures 1 to 5 A device for tumor resection in oral and maxillofacial surgery, comprising a base, the base comprising a fixed plate 1, the fixed plate 1 being connected with a height adjusting assembly, the free end of the height adjusting assembly being connected with a mounting shell 4; in this embodiment, the height adjusting assembly comprises an inner threaded tube 3, the two ends of the inner threaded tube 3 being connected with outer threaded rods 2 of opposite screw directions through threaded connection, one outer threaded rod 2 being connected with the fixed plate 1 and the other outer threaded rod 2 being connected with the mounting shell 4;

[0032] The mounting shell 4 is connected with a driving assembly and a pair of mouth props 9; the mouth props 9 are arc-shaped pieces, and the pair of arc-shaped pieces enclose a mouth-shaped piece, and the mouth props 9 are provided with tooth grooves for supporting teeth, the inner walls of the tooth grooves being connected with flexible pads 10; one side wall of the tooth groove is connected with a lip support plate 11;

[0033] The driving assembly comprises a screw rod 5 rotatably connected with the mounting shell 4, the mounting shell 4 being provided with a motor 12 for driving the rotation of the screw rod 5, the screw rod 5 being connected with a pair of nuts 6 of opposite screw directions through threaded connection, and the nuts 6 being connected with the mounting shell 4 along the axial direction of the screw rod 5, wherein the mounting shell 4 is provided with a sliding groove 7 along the length direction, the nut 6 is connected with a sliding block 8, the sliding block 8 is slidably connected in the sliding groove 7, the screw rod 5 rotates, and the two nuts 6 move linearly along the axial direction of the screw rod 5 in opposite directions; and the mounting shell 4 is provided with a through slot 35 extending along the length direction on one side, the nut 6 is connected with a connecting rod 34, the free end of the connecting rod 34 passes through the through slot 35 and is connected with the mouth prop 9, and the width of the through slot 35 is matched with the diameter of the connecting rod 34; in addition, the screw rod 5 is coaxially connected with a straight gear 13, and the mounting shell 4 is slidably connected with a first straight rack 14 and a second straight rack 15, i.e., the mounting shell 4 is provided with slide ways 16 on two opposite sides, the first straight rack 14 and the second straight rack 15 are connected with slide rails 17, and the slide rails 17 are slidably connected in the slide ways 16; and the first straight rack 14 and the second straight rack 15 are engaged with the straight gear 13.

[0034] The first straight rack 14 is connected with a pulling member 18 near one end of the mouth expander 9, the pulling member 18 is a hook or a clamping member made of elastic material; the mounting shell 4 is further provided with a liquid suction pump 32, the suction end of the liquid suction pump 32 is connected with a suction pipe 33, the suction pipe 33 is detachably connected with the pulling member 18;

[0035] The second straight rack 15 is connected with an ejection member 23 near one end of the mouth expander 9, in this embodiment, the second straight rack 15 is connected with the ejection member 23 through a position adjusting assembly, the position adjusting assembly comprises a threaded sleeve 20 and an adjusting threaded rod 19 which are connected through threads, the free end of the adjusting threaded rod 19 is connected with the second straight rack 15, the free end of the threaded sleeve 20 is rotatably connected with a sleeve pipe 21, the threaded sleeve 20 is provided with a limiting member 22 which limits the rotation of the sleeve pipe 21, the limiting member 22 is a pressing bolt, the ejection member 23 is connected with the sleeve pipe 21. Wherein, the screw rod 5, the nut 6, the first straight rack 14 and the second straight rack 15 are all arranged in the mounting shell 4; the mounting shell 4 is connected with a pump 25 near one side of the second straight rack 15, the second straight rack 15 is connected with a push plate 30, the push plate 30 is connected with a pumping rod 26 of the pump 25, specifically, the side wall of the mounting shell 4 is provided with a strip-shaped opening 31, one end of the push plate 30 is connected with the second straight rack 15, the other end of the push plate 30 passes through the strip-shaped opening 31 and is connected with the pumping rod 26, that is, the push plate 30 can slide along the length direction of the strip-shaped opening 31, so as to push the pumping rod 26 to realize the inflation of the air bag protrusions 24; the side of the ejection member 23 away from the second straight rack 15 is provided with a plurality of air bag protrusions 24, the ejection member 23 is internally provided with a gas passage which is in communication with the air bag protrusions 24, the gas outlet end of the pump 25 is in communication with the gas passage. In this embodiment, the gas passage comprises a main flow channel 28 and a plurality of branch flow channels 29, one end of the main flow channel 28 is in communication with the plurality of branch flow channels 29 respectively, the other end of the main flow channel 28 is in communication with the gas outlet end of the pump 25 through a gas guide pipe 27, the branch flow channels 29 correspond to the air bag protrusions 24 one by one, and one end of the branch flow channels 29 away from the main flow channel 28 is in communication with the air bag protrusions 24.

[0036] The specific implementation process is as follows:

[0037] When the present resection device is used, first, the patient is laid on the operating table, the fixing plate 1 is fixed on the fixed support such as the operating bed, the table plate, etc., the inner threaded pipe 3 is adjusted according to the head shape and face shape of the patient, so as to adjust the height of the installation shell 4, the inner threaded sleeve 20 is rotated according to the position of the tumor, and the sleeve pipe 21 is fixed by the limiting piece 22; the upper and lower dental beds of the patient are placed in the alveolus, the motor 12 is started, the motor 12 drives the screw rod 5 to rotate, the screw rod 5 drives the nut 6 to slide along the axial direction of the screw rod 5, so as to drive a pair of mouth opening pieces 9 to move away from each other, and the mouth of the patient is opened; at the same time, the screw rod 5 also drives the spur gear 13 to rotate, the spur gear 13 drives the first straight rack 14 and the second straight rack 15 to move towards the opposite directions, so that the ejection piece 23 ejects the cheek of the patient towards the middle part of the oral cavity, and at the same time, the traction piece 18 pulls the corners of the mouth of the patient outward, so as to fully expose the surgical field of view; and in the process that the second straight rack 15 moves towards the cheek of the patient, the push plate 30 also pushes the inflating rod 26, so that the gas of the inflator 25 flows to the air bag protrusion 24 through the main flow channel 28 and the branch flow channel 29, so as to increase the friction and improve the comfort; the suction end of the suction pipe 33 is placed at the tumor, the liquid suction pump 32 is started, and the doctor uses the scalpel or the electric knife to perform mucosa incision, tissue separation, and lesion resection, and in the process, the suction pump 32 can suck out the bleeding, so as to further fully expose the surgical field of view.

[0038] The pair of mouth opening pieces 9 are in the shape of a mouth, which is used to open the mouth of the patient, so as to facilitate the operation of the medical staff; the ejection piece 23 is used to eject the cheek of the patient towards the middle part of the oral cavity, increase the supporting force at the tumor, and maximally expose the tumor, increase the surgical field of view, and facilitate the operation of the doctor; the motor 12 drives the screw rod 5 to rotate and drive a pair of mouth opening pieces 9 to separate, so as to open the mouth of the patient and increase the surgical field of view; in addition, the rotation of the screw rod 5 drives the spur gear 13 to rotate, the spur gear 13 drives the first straight rack 14 and the second straight rack 15 to move towards the opposite directions, the second straight rack 15 drives the ejection piece 23 to eject the cheek of the patient towards the middle part of the oral cavity, and at the same time, the first straight rack 14 drives the traction piece 18 to pull the corners of the mouth of the patient outward, further increase the surgical field of view in the oral cavity, and facilitate the operation of the medical staff; therefore, by using the device, the mouth of the patient can be opened, the cheek can be ejected towards the middle part of the oral cavity, and the corners of the mouth can be pulled outward, without the assistance of multiple assistants, the crowding of the people around the operating table is avoided, and a stable and clear surgical field of view can be continuously provided; in addition, the ejection piece 23 can also provide support at the cheek, avoid the soft tissue from moving and deforming when the scalpel is cut, reduce the operation difficulty, make the tumor resection more thorough, increase the efficiency, and avoid the delay of the illness.

[0039] The second straight rack 15 moves to push the push plate 30, so that the gas in the inflator 25 flows to the air bag protrusions 24 through the gas flow channel, so that the air bag protrusions 24 are inflated, and the air bag protrusions 24 are in contact with the cheeks of the patient, which can increase the friction force, avoid the top piece 23 from sliding during the operation to cause secondary injury to the patient, and in addition, the flexible nature of the air bag can also reduce the pressure on the patient's cheeks, avoid damaging the patient's cheeks. The gas passage is provided with a main flow channel 28 and a plurality of branch flow channels 29 which are connected with each other, so that the gas in the inflator 25 can flow uniformly to each branch flow channel 29 through the main flow channel 28, so that each air bag protrusion 24 can be inflated to avoid local stress on the cheeks.

[0040] The fixed plate 1 of the base is connected to the bed plate, table plate, operating table and other supporting members by bolts, pins and other connecting members, and can fix the entire device; the fixed plate 1 is connected with the mounting shell 4 through the height adjusting assembly, the screw rod 5, the nut 6, the first straight rack 14 and the second straight rack 15 are all arranged in the mounting shell 4, which can avoid that the parts damage the medical staff or the patient; wherein the height adjusting assembly is an inner threaded pipe 3 and two outer threaded rods 2 with opposite screw directions, by rotating the inner threaded pipe 3, the height of the mounting shell 4 can be adjusted to adapt to patients of different body types, and the applicability is wide. In addition, the mounting shell 4 and the nut 6 are connected through the sliding groove 7 and the sliding block 8, which ensures the uniformity and stability of relative motion, improves the functionality and accuracy of the entire device; and one side of the mounting shell 4 is provided with a through groove 35 extending along the length direction, the connecting rod 34 connected with the wire seat passes through the through groove 35 and is connected with the mouth prop 9, and the width of the through groove 35 is matched with the diameter of the connecting rod 34, the through groove 35 can limit the connecting rod 34 to avoid shaking, and the uniformity and stability of relative motion are improved.

[0041] The mouth prop 9 is provided with a tooth groove for supporting the teeth, and the teeth are placed in the pressure groove to avoid shaking during the operation and ensure the safety of the operation; in order to reduce the pressure on the patient's teeth, the inner wall of the tooth groove is connected with a flexible pad 10; in addition, one side wall of the tooth groove is connected with a lip support plate 11, which can support the upper and lower lips of the patient to avoid the lips interfering with the operation field of the doctor. The pulling member 18 is a drag hook which can hook the corners of the patient's mouth to avoid slipping during pulling; the pulling member 18 can also be a clamping member made of elastic material, which can clamp the corners of the patient's mouth to further avoid the pulling member 18 from slipping and ensure the safety of the operation. In addition, the base is also provided with a liquid suction pump 32, and the suction end of the liquid suction pump 32 is connected with a suction pipe 33, which is placed at the cutting position during the operation to suck out the exuded blood in time, and the suction pipe 33 is detachably connected with the pulling member 18, which can fix the suction pipe 33 at the corner of the mouth, and the medical assistant does not need to hold it, which can stably suck the exuded blood, can avoid the crowding of people around the operating table, and can continuously provide a stable and clear operation field.

[0042] The second straight rack 15 is connected with the ejector 23 through the internally threaded sleeve 20 and the adjusting threaded rod 19, the distance of the ejector 23 can be adjusted, and it is adapted to the tumor in different oral cavity depths; the internally threaded sleeve 20 is rotationally connected with the sleeve pipe 21, the ejector 23 is connected with the sleeve pipe 21, the angle of the ejector 23 can be adjusted, so as to adapt to different cheek radii, so that the ejector 23 is more fitted to the face, and the contact area is increased.

[0043] The above is only the embodiment of the present application, and the specific technical solutions or common knowledge of the scheme are not described in detail. It should be pointed out that for those skilled in the art, without departing from the technical solutions of the present application, a number of modifications and improvements can be made, which should also be considered as the protection scope of the present application, and these will not affect the effect and practicality of the present application. The protection scope of the present application should be subject to the content of its claims, and the specific implementation mode and the like in the specification can be used to explain the content of the claims.

Claims

1. A device for resecting tumors in oral and maxillofacial surgery, characterized in that, The device includes a base, which is connected to a drive assembly and a pair of mouth-spreading members. The drive assembly includes a screw rotatably connected to the base, and the base is connected to a motor that drives the screw to rotate. The screw is threadedly connected to a pair of nuts with opposite directions of rotation, and the nuts are slidably connected to the base along the axial direction of the screw. When the screw rotates, the two nuts move linearly in opposite directions along the axial direction of the screw. A pair of mouth-opening components are respectively connected to two nuts; a spur gear is coaxially connected to the screw; a first spur rack and a second spur rack are slidably connected to the base and are arranged in opposite directions, and both the first spur rack and the second spur rack mesh with the spur gear; a pulling member is connected to the end of the first spur rack near the mouth-opening component; and an ejector is connected to the end of the second spur rack near the mouth-opening component.

2. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, An air pump is connected to the base near the second rack, and a push plate is connected to the second rack. The push plate is connected to the air pump rod. The ejector is provided with several airbag protrusions on the side opposite to the second rack. The ejector is provided with a gas channel communicating with the airbag protrusions. The air outlet of the air pump is connected to the gas channel.

3. The oral and maxillofacial surgical tumor resection device according to claim 2, characterized in that, The gas channel includes a main channel and several branch channels. One end of the main channel is connected to several of the branch channels, and the other end of the main channel is connected to the air outlet of the air pump through a guide pipe. Each branch channel corresponds to a protrusion of the air bag, and the end of the branch channel away from the main channel is connected to the protrusion of the air bag.

4. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, The base includes a fixing plate, the fixing plate is connected to a height adjustment component, and the free end of the height adjustment component is connected to a mounting shell; the screw, the nut, the first straight rack and the second straight rack are all located inside the mounting shell.

5. The oral and maxillofacial surgical tumor resection device according to claim 4, characterized in that, The height adjustment assembly includes an internally threaded tube, with externally threaded rods of opposite directions connected to both ends of the internally threaded tube via threads. One of the externally threaded rods is connected to the fixed plate, and the other externally threaded rod is connected to the mounting shell.

6. The oral and maxillofacial surgical tumor resection device according to claim 4, characterized in that, The mounting shell has a groove along its length, and the nut is connected to a slider, which is slidably connected within the groove. A through groove extending along its length is provided on one side of the mounting shell, and the nut is connected to a connecting rod. The free end of the connecting rod passes through the through groove and is connected to the mouth-opening member. The width of the through groove is adapted to the diameter of the connecting rod.

7. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, The mouth opening component is an arc-shaped component, and the mouth opening component has a tooth groove for supporting the teeth; the inner wall of the tooth groove is connected to a flexible pad; and a lip support plate is connected to one side wall of the tooth groove.

8. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, The second spur rack is connected to the ejector via a position adjustment assembly. The position adjustment assembly includes an internally threaded sleeve and an adjusting threaded rod connected by threads. The free end of the adjusting threaded rod is connected to the second spur rack. The free end of the internally threaded sleeve is rotatably connected to a sleeve. The internally threaded sleeve is provided with a limiting member that restricts the rotation of the sleeve. The ejector is connected to the sleeve.

9. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, The pulling element is a hook or a clamping element made of elastic material.

10. The oral and maxillofacial surgical tumor resection device according to claim 1, characterized in that, The base is also connected to a liquid suction pump, and the suction end of the liquid suction pump is connected to a suction tube, which is detachably connected to the pulling member.

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