Improved mandible navigation reference frame

Abstract

The invention discloses an improved mandible navigation reference frame, and relates to the technical field of medical instruments, the improved mandible navigation reference frame comprises a main shaft, the top of the main shaft is provided with a navigation reference piece used for navigation in a mandible operation, the bottom of the main shaft is provided with a fixing piece used for being fixed to the lower jaw of a patient, and the main shaft is provided with a mouth distraction assembly used for distraction of the mouth of the patient; the hollow cup motor drives the driving nut to rotate, then the driving screw pushes the telescopic part to extend under the action of threads, the mouth of a patient is opened through the opening part at the movable end of the telescopic part, the driving nut is locked through the self-adaptive locking component, the telescopic part stops extending, and the mandible is exposed to the outside. A traction screw is screwed into the fixing piece, and the navigation reference frame is fixed to the lower jaw of the patient so as to navigate the lower jaw operation; the device has the advantages of being convenient to operate, high in mounting efficiency, good in fixing effect and wide in application range.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to an improved mandibular navigation reference frame. Background Art

[0002] The mandible is a vital facial bone structure, and its function and morphology crucially influence chewing, speech, breathing, and facial aesthetics. Whether repairing a mandibular fracture caused by trauma, reconstructing the mandible after tumor resection, or improving facial morphology through orthognathic surgery, precise surgical techniques are required to ensure effective surgery. Currently, commonly used mandibular navigation reference frames were primarily designed for open maxillofacial surgery and are more suitable for precise positioning of maxillofacial bone flap repairs. With the continuous advancement of medical technology, computer-assisted navigation technology has been gradually applied to mandibular surgery. Navigation systems can help surgeons more accurately locate the surgical site during surgery, improving both accuracy and safety. However, existing navigation reference frames require the patient's mouth to be held open and secured with traction pins. This requires a large number of medical personnel to maintain the mouth open, which is labor-intensive and requires other surgical instruments to occupy the operating space in the patient's mouth, making the navigation reference frame inconvenient to install. This, in turn, reduces surgical efficiency and may even lead to surgical failure.

[0003] Existing positioning reference frame devices, such as a maxillary positioning reference frame for surgical navigation provided by publication number CN210384065 U, include a reference frame and a base, a reflective ball is provided on the reference frame, the lower end of the reference frame is connected to the first connecting column by a connecting rod, the first connecting column is fixed to the second connecting column, the second connecting column is connected to the transition connecting column away from the first threaded hole end, the transition connecting column is fixed to the longitudinal connecting column, the base is provided with a first bracket along the circumference, the first bracket is provided with three, the first bracket is provided with a pin downward away from the base end, the middle of the base is provided with a third through hole, the third through hole is sleeved on the outside of the titanium nail channel, the titanium nail channel is connected to the base through a first locking nut and the position is adjusted, and the longitudinal connecting column is connected to one of the first brackets; since the application does not take into account the situation where the patient's mouth needs to be opened in actual circumstances, it is inconvenient to fix the positioning reference frame during actual operation, which in turn reduces the efficiency of the operation. Summary of the Invention

[0004] In response to the above-mentioned problems, the present invention aims to provide an improved mandibular navigation reference frame. By designing a mouth opening component, the patient's mouth is opened by the opening part and adaptively fixed, and the opening part is locked or unlocked by the locking part so that the adjustment part can adjust the angle according to the different patient's mouth shapes. It has the advantages of easy operation, high installation efficiency, good fixation effect and wide range of applications.

[0005] The main idea of the technical scheme adopted by the application is: a mouth opening assembly is designed, the length of the telescopic piece is adjusted by the hollow cup motor in the opening part cooperating with the drive nut and the drive screw, so as to open the patient's mouth, and the opening part is locked by the self-adaptive locking member to maintain the opening size of the patient's mouth, so as to fix the navigation reference frame to the patient's lower jaw, and the rotation angle of the telescopic piece is locked or unlocked by the locking part, so as to adjust according to different situations or different patient's mouth shapes.

[0006] In order to achieve the above purpose, the technical scheme adopted by the application is as follows: An improved mandibular navigation reference frame, comprising a main shaft, a navigation reference piece for navigation in mandibular surgery is arranged at the top of the main shaft, a fixing piece for fixing to the patient's lower jaw is arranged at the bottom of the main shaft, and a mouth opening assembly for opening the patient's mouth is arranged on the main shaft.

[0007] The mouth opening assembly comprises an opening part for opening the patient's mouth, the opening part comprises a plurality of telescopic pieces rotatably arranged on the main shaft, the end of the telescopic piece away from the main shaft is further provided with an opening piece, and the telescopic piece is provided with a drive member capable of adjusting the length of the telescopic piece.

[0008] Based on the above technical scheme, further, the drive member comprises a hollow cup motor fixedly arranged in the fixed end of the telescopic piece, the power output end of the hollow cup motor is fixed with a drive nut, the drive nut is provided with a drive screw, and the drive screw is rotatably arranged in the movable end of the telescopic piece; when the hollow cup motor drives the drive nut to rotate, since the drive screw is fixed relative to the movable end of the telescopic piece, the drive nut can drive the movable end of the telescopic piece to move outward or inward relative to the fixed end through the thread cooperation with the drive screw, that is, the length of the telescopic piece is adjusted.

[0009] Based on the above technical solution, further, the stretching member includes a mounting frame fixedly connected to the movable end of the telescopic member, a support plate slidably arranged in the mounting frame, one side of the support plate is fixedly connected to a silicone support ring through a transversely arranged rod, and a support plate reset member is provided in the mounting frame, and a silicone support block is provided on the mounting frame and below the silicone support ring, and an adjusting lever is provided inside the mounting frame that can be squeezed by the support plate toward the main axis direction, and a pushing member is provided on the adjusting lever away from the contact with the support plate to push the bottom end of the silicone support block toward the mounting frame; when the telescopic member is extended to drive the mounting frame to move, the silicone support ring contacts the patient's mouth and squeezes the support plate in the mounting frame through the reaction force generated, and the support plate then squeezes the adjusting lever and pushes the bottom of the silicone support block outward through the pushing member at the bottom, so as to support the patient's lip part through the silicone support ring, and support the inner wall of the patient's oral cavity through the silicone support block, so as to stably stretch the patient's mouth.

[0010] Based on the above technical solution, further, an adaptive locking component for locking the driving component is provided in the telescopic component, and the adaptive locking component includes a pair of locking blocks that can be sleeved onto the outside of the driving nut, and a limit block that can make the locking block open or close is slidingly provided in the telescopic component, and the limit block is fixedly connected to the support plate through a connecting rod; when the support plate is squeezed, the limit block is driven by the connecting rod to slide along the inside of the locking block to close the locking block, and the driving nut and the hollow cup motor are locked by friction, that is, the telescopic component is adaptively stopped from extending to maintain the open and fixed state of the patient's mouth.

[0011] The mouth opening assembly also includes a locking part, which includes a plurality of fixed rings sleeved and fixed on the main shaft, and a plurality of sliding rings sleeved on the main shaft are slidably arranged in the fixed ring. The top of the sliding ring passes through the top of the fixed ring and is fixedly connected to the fixed end of the telescopic part.

[0012] Based on the above technical solution, further, mutually cooperating limiting teeth and grooves are provided below the top of the fixed ring and above the bottom of the sliding ring, and a sliding ring reset member capable of resetting the sliding ring is also provided in the fixed ring; by pressing the telescopic member and the sliding ring downward relative to the fixed ring, the limiting teeth and grooves on the sliding ring and the fixed ring are unlocked, so that the telescopic member can be rotated and adjusted relative to the main shaft. After the adjustment is completed, the telescopic member is reset by the sliding ring reset member, and the fixed ring and the sliding ring are locked again by the cooperation of the limiting teeth and grooves.

[0013] A method for installing an improved mandibular navigation reference frame comprises the following steps: S1. Press the telescopic member downward along the axis of the main shaft to separate the two limiting tooth grooves so that the two telescopic members can be rotated and adjusted according to the different shapes of the patient's mouth; S2. Place the navigation reference frame at the patient's mouth. At this point, the two telescopic members are not in contact with the sides of the patient's mouth. Start the hollow cup motor, drive the drive screw to rotate through the drive nut, and extend the telescopic member by moving the drive screw laterally. S3. When the telescopic part extends and opens the patient's mouth, the silicone support ring squeezes the support plate and the connecting rod, so that the limit block drives the locking block to close to stop the lateral movement of the drive screw, that is, the telescopic part stops extending. At the same time, the bottom of the silicone support block is pushed out under the action of the adjusting lever to open the patient's mouth and initially fix the navigation reference frame. Then, the traction screw is screwed into the fixing piece at the bottom of the main shaft to fix the navigation reference frame to the patient's mandible.

[0014] The beneficial effects of the present invention are: 1. By designing a mouth opening component, the hollow cup motor drives the drive nut to rotate, and then the drive screw is moved laterally through the thread action to drive the telescopic part to adjust the length, and the silicone support ring and silicone support block at the far end of the telescopic part are used to open the patient's mouth so that the navigation reference frame can be fixed to the patient's lower jaw. Compared with the existing technology that requires multiple medical staff to open the patient's mouth and install the navigation reference frame, the present invention only requires one medical staff to complete the operation of opening the patient's mouth and installing the navigation reference frame, which makes the present invention easy to operate and thus improves the installation efficiency of the navigation reference frame.

[0015] 2. By designing a mouth opening component, the patient's mouth is opened by a telescopic part, and the length of the telescopic part is automatically locked by an adaptive locking component. At the same time, the two sides of the mouth and the inner wall of the oral cavity are supported by a silicone support ring and a silicone support block, so that the navigation reference frame can be initially and stably fixed to the patient's mouth while the patient's mouth is opened, so that the navigation reference frame can be fixed to the patient's lower jaw by screwing in the traction screw, which makes the present invention have the advantage of good fixation effect.

[0016] 3. By designing a locking part, by arranging a fixed ring and a sliding ring on the main shaft, and arranging mutually engaging limiting teeth and grooves on the fixed ring and the sliding ring, when it is necessary to adjust the rotation angle of the two telescopic parts, the locking state of the limiting teeth and grooves can be released by pressing the telescopic parts downward, and the locking of the telescopic parts can be automatically restored after the adjustment is completed, so that the present invention can be adjusted according to the mouth shapes of different patients, and has the advantage of a wide range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 A front view of the present invention Figure 3 A top view of the present invention; Figure 4 A schematic diagram of the three-dimensional structure of the mouth opening component; Figure 5 for Figure 4 Schematic diagram of the internal structure after cutting at A; Figure 6 A schematic diagram of the internal structure of the opening member for opening the two sides of the mouth in a normal state; Figure 7 A schematic diagram of the internal structure of the opening member for opening the two sides of the mouth in a squeezed state; Figure 8 Schematic diagram of the internal structure of the opening member used to open the lower part of the mouth Figure 9 is a schematic diagram of the three-dimensional structure when the adaptive locking component is unlocked; Figure 10 It is a schematic diagram of the three-dimensional structure when the adaptive locking component is locked; Figure 11 is an installation diagram of the adaptive locking component; Figure 12 Schematic diagram of the internal structure of the locking part; Figure 13 for Figure 12 A local detail view at point B; Figure 14 for Figure 13 A partial detail view of the locking portion shown in the unlocked state; Figure 15 This is a schematic diagram of the installation at the fixing parts.

[0018] : Among them: 1. Main shaft; 2. Navigation reference part; 3. Fixing part; 4. Mouth opening assembly; 5. Opening part; 501. Telescopic part; 502. Opening part; 5021. Mounting frame; 5022. Silicone support ring; 5023. Support plate; 5024. Support plate reset part; 5025. Silicone support block; 5026. Adjustment lever; 5027. Pushing part; 5028. Limiting plate; 503. Driving component; 5031. Hollow cup motor; 5032. Driving nut; 5033. Driving screw; 5034. Sleeve; 504. Adaptive locking component; 5041. Locking block; 5042. Limiting block; 5043. Connecting rod; 5044. Fixed block; 6. Locking part; 601. Fixed ring; 602. Sliding ring; 603 Limiting tooth groove; 604. Sliding ring reset part. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] The inventors' research found that the currently commonly used mandibular navigation reference frame was originally designed for maxillofacial open incision surgery and is more suitable for cases such as precise positioning of maxillofacial bone tissue flap repair. With the continuous development of medical technology, computer-assisted navigation technology has gradually been applied to mandibular surgery. The navigation system can help doctors locate the surgical site more accurately during the operation, thereby improving the accuracy and safety of the operation. However, when using the existing navigation reference frame device, since the patient's mouth needs to be held open and fixed with traction pins, a large number of medical staff are required to hold the patient's mouth open together. While wasting manpower, other surgical instruments will also occupy the operating space of the patient's mouth, making the navigation reference frame inconvenient to install, thereby reducing the efficiency of the operation and may even lead to the failure of the operation.

[0021] Based on the above findings, the present application proposes an improved mandibular navigation reference frame, which designs a mouth opening component and adjusts the length of the telescopic part through the hollow cup motor in the opening part in conjunction with the drive nut and the drive screw to open the patient's mouth, and locks the opening part in combination with an adaptive locking component to maintain the opening size of the patient's mouth, so that the navigation reference frame can be fixed to the patient's mandible, and the rotation angle of the telescopic part can be locked or unlocked in combination with the locking part so that it can be adjusted according to different situations or different patient mouth shapes; it has the advantages of easy operation, high installation efficiency, good fixation effect and a wide range of applications.

[0022] See Figures 1-3 The present application discloses an improved mandibular navigation reference frame, comprising a main shaft 1, the top of which is connected to a navigation reference component 2 used for navigation in mandibular surgery by a connecting rod structure with adjustable angle. The navigation reference component 2 can refer to an existing navigation reference positioning device and realize three-dimensional spatial positioning by tracking the movement of an infrared reflective ball array located at the top in the field of view space through an infrared tracking positioning device.

[0023] See Figure 15A fixing part 3 for fixing the navigation reference frame as a whole to the patient's mandible is provided at the bottom of the main shaft 1. A plurality of positioning pins are provided below the bottom of the fixing part 3. At the same time, a mounting threaded hole structure for screwing in a traction screw is provided in the middle of the fixing frame 3, or a mounting hole is provided in the middle of the fixing frame 3 and a self-tapping screw is screwed in to fix the navigation reference frame to the mandible of the patient undergoing surgery in a minimally invasive manner.

[0024] See Figure 4 A mouth opening component 4 for opening the patient's mouth is provided on the axis of the main shaft 1 so that the navigation reference frame can be fixed using the fixing part 3. The mouth opening component 4 can be roughly divided into an opening part 5 and a locking part 6. The opening part 5 can drive the telescopic part 501 to extend through the driving member 503, and then push the opening part 502 to open the two sides of the patient's mouth, and lock the driving member 503 through the adaptive locking member 504, thereby adaptively maintaining the patient's mouth in the opened state. The locking part 6 can lock or unlock the rotation adjustment of the telescopic part 501 in the opening part 5 along the main shaft 1.

[0025] The expansion part 5 includes a plurality of telescopic parts 501 rotatably arranged on the main shaft 1. In one embodiment of the present invention, the telescopic part 501 includes a fixed end and a movable end. The movable end can be extended or retracted from the fixed end. The telescopic part 501 is a flat rectangular structure as a whole, and the number of telescopic parts 501 is three, two of which are located roughly on the same straight line and are used to cooperate with the expansion part 502 to expand the two sides of the patient's mouth, and the other telescopic part 501 is used to expand the patient's mouth near the lower jaw. A driving component 503 is provided in each of the telescopic parts 501.

[0026] See Figure 5 , the driving component 503 includes a hollow cup motor 5031, and the hollow cup motor 5031 is fixed to the fixed end of the telescopic member 501. Specifically, a slender hollow cylindrical sleeve 5034 is fixed at the inner center of the fixed end of the telescopic member 501, and the hollow cup motor 5031 is fixed in the inner wall of the sleeve 5034 near the connection between the fixed end and the movable end of the telescopic member 501. The hollow cup motor 5031 can drive the annular structure to rotate, and a through hole is provided in the middle thereof to allow the cylindrical shaft to pass through. The hollow cup motor 5031 can refer to the "JT-4CL hollow cup motor" product produced by Shenzhen Juteng Motor Co., Ltd. The outer diameter of the micro hollow cup motor is 4mm and the length is 8mm. It is arranged in the sleeve 5034 of the telescopic member 501 by means of clamping or bolting; A driving nut 5032 is fixed to the power output end of the coreless motor 5031. A driving screw 5033 is provided in the driving nut 5032 by a threaded connection. The driving screw is rotatably provided in the movable end of the telescopic member 501 at one end away from the fixed end of the telescopic member 501. Figure 8 During installation, a circular clamping ring structure can be set at the movable end of the telescopic part, and one end of the driving screw 5033 can be clamped into the clamping ring. Then, when the driving nut 5032 rotates under the drive of the hollow cup motor 5031, it can drive the driving screw 5033 to rotate. Since the driving screw 5033 is limited by the movable end of the telescopic part 501, the driving screw 5033 can then move axially relative to the driving nut 5032, thereby driving the telescopic part 501 to extend or shorten.

[0027] See Figures 6-8 The support member 502 includes a mounting frame 5021, which is fixed to the farthest end of the movable end of the telescopic member 501. At the same time, since the multiple telescopic members 501 are arranged on the main shaft 1 with a certain height difference, the mounting frame 5021 can be fixed to the telescopic member 501 by using different heights of its frame as connection points, so that the mounting frame 5021 is roughly at the same height. In addition, a limiting plate 5028 is further provided on the side of the mounting frame 5021 away from the telescopic member 501. A silicone support ring 5022 that fits the shape of the human mouth is provided on the mounting frame 5021 and on the side away from the telescopic member 501. Specifically, a transverse connecting rod is fixed on the side of the silicone support ring 5022 that does not contact the mouth. The connecting rod penetrates into the interior of the mounting frame 5021, and a support plate 5023 fixedly connected to the connecting rod is also fixed at one end located inside the mounting frame 5021. The support plate 5023 is slidably provided in the mounting frame 5021, and the support plate 5023 is fixed to the mounting frame 5021. The lower half of the support plate 5023 can be locked and limited by the limit plate 5028. A plurality of support plate reset members 5024 are provided in the mounting frame 5021 to reset the support plate 5023. The support plate reset members 5024 can be made of micro springs. When the telescopic member 501 is extended, the silicone support ring 5022 contacts the patient's mouth and is subjected to a reaction force generated by the mouth. The connecting rod can push the support plate 5023 and squeeze the support plate reset members 5024. A silicone support block 5025 is provided at the lower part of the limiting plate 5028 and on one side close to the position of the silicone support ring 5022. It is located at the lower part of the mounting frame 5021 and is rotatably installed with an adjustment lever 5026 by means of a rotating shaft. When the support plate 5023 is pushed, its bottom can contact the top of the adjustment lever 5026 to push the top of the adjustment lever 5026 away from the patient's mouth, that is, the bottom of the adjustment lever 5026 will rotate toward the patient's mouth. A pushing member 5027 with a curved surface structure is provided at the bottom of the mounting frame 5021 and is slidably provided between the adjustment lever 5026 and the silicone support block 5025. The pushing member 5027 passes through the bottom of the limiting plate 5028. When the bottom of the adjustment lever 2026 moves toward the patient's mouth, it can push the pushing member 5027, thereby pushing the bottom of the silicone support block 5025 to bend and deform, so as to cooperate with the silicone support ring 5022 to support and fix the patient's mouth.

[0028] In one embodiment, a telescopic member 501 is further included for stretching the patient's mouth near the lower jaw. The difference between the telescopic member 501 and the stretching member 502 including the silicone support ring 5022 is that the stretching member 502 on the telescopic member 501 only includes a vertically arranged silicone support block 5025. When the upper part of the silicone support block 5025 at this location contacts the lower jaw of the patient's mouth, it can also squeeze the support plate 5023, thereby causing the adjustment lever 5026 to push the push rod 5027 to push the bottom of the silicone support block 5025 outward to form a triangular positioning for the patient's mouth, thereby improving the stability of the stretching part 5 when it is fixed relative to the patient's mouth.

[0029] See Figures 9-11The inside of the telescopic member 501 is also provided with an adaptive locking member 504 for locking the driving member 503 to stop the telescopic member 501 from extending, which comprises a pair of locking blocks 5041. In an embodiment, a fixed block 5044 is vertically arranged inside the telescopic member 501, one end of the fixed block 5044 is fixed to the outside of the sleeve 5034 by means of bolt connection, and a sliding groove capable of making the pair of locking blocks 5041 vertically slide away from the horizontal center line is arranged on the surface of the fixed block 5044. That is, the two locking blocks 5041 are symmetrically arranged along the horizontal center line of the fixed block 5044, and a slanting T-shaped sliding groove structure is arranged on the locking block 5041 close to the horizontal center line. Meanwhile, a horizontally arranged connecting rod 5043 is fixed on the support plate 5023, one end of the connecting rod 5043 away from the support plate 5023 penetrates into the telescopic member 501, and a limiting block 5042 is fixed on the end inside the telescopic member 501, which is a wedge block with a cross section close to isosceles trapezoid, and T-shaped sliding blocks are arranged on the two inclined surfaces of the limiting block 5042 to cooperate with the T-shaped sliding groove structure on the locking block 5041. When the connecting rod 5043 is pushed by the support plate 5023, the limiting block 5042 can move laterally, and through the cooperation of the T-shaped sliding groove and the T-shaped sliding block, the two locking blocks 5041 are driven to move along the horizontal center line of the fixed block 5044. When the two locking blocks 5041 contact the outside of the driving nut 5032, the driving nut 5032 can be stopped from rotating by friction, so that the length of the telescopic member 501 is locked to maintain the opening state of the patient's mouth, and then the navigation reference frame can be fixed to the patient's lower jaw using the fixing member 3.

[0030] Referring to Figures 12-14The locking portion 6 includes a fixing ring 601 sleeved on the main shaft 1. The number of fixing rings 601 is the same as the number of telescopic members 501, and the fixing ring 601 can be fixed to the main shaft 1 by setting a boss structure. A sliding ring 602 with the same number as the fixing ring 601 is slidingly sleeved on the main shaft 1. The top of the sliding ring 602 can pass through the top of the fixing ring 601, and the top of the sliding ring 602 is fixed to the fixed end of the telescopic member 501 by a card connection or a bolt connection, that is, the telescopic member 501 can drive the sliding ring 602 to rotate along the main shaft 1 for rotation adjustment; mutually cooperating limiting tooth grooves 603 are provided above the bottom of the sliding ring 602 and below the top of the fixing ring 601. At the same time, a tooth groove 603 that can make The sliding ring reset member 604 resets the sliding ring 602 upward. When the telescopic member 501 needs to be rotated, the telescopic member 501 is pressed down to move the sliding ring 602 downward along the main shaft 1, that is, the sliding ring 602 moves toward the inside of the fixed ring 601. At this time, the limiting tooth groove 603 is disengaged, and the bottom of the sliding ring 602 compresses the sliding ring reset member 604 downward, so that the telescopic member 501 can be rotated and adjusted. When the adjustment is completed, the telescopic member 501 is released, and the sliding ring reset member 604 can be used to reset the sliding ring 602 upward, and the two limiting tooth grooves 603 are engaged again to lock the rotation of the telescopic member 501. When using the mouth opening component 4 to open the patient's mouth, the relative position of the telescopic member 501 can be pre-adjusted according to the shape of the patient's mouth to improve the effect of opening the patient's mouth.

[0031] A method for using an improved mandibular navigation reference frame comprises the following steps: S1. Press the telescopic member 501 downward along the axial direction of the main shaft 1 to separate the two limiting tooth grooves 603 so as to rotate and adjust the two telescopic members 501 according to the different shapes of the patient's mouth; S2. Place the navigation reference mount at the patient's mouth. At this point, the two telescopic members 501 are not in contact with the sides of the patient's mouth. Start the coreless motor 5031, which drives the drive screw 5033 to rotate via the drive nut 5032. The drive screw 5033 then moves laterally, causing the two telescopic members 501 to extend. S3, when the telescopic part 501 is elongated and the patient's mouth is pried open by the prying part 502, the silica gel support ring 5022 extrudes the support plate 5023 and the connecting rod 5043, so that the limiting block 5042 drives the locking block 5041 to close, thereby locking the drive nut 5032 by friction, stopping the transverse movement of the drive screw 5033, and stopping the elongation of the telescopic part 501, while the bottom of the silica gel support block 5025 is pushed out under the action of the adjusting lever 5026 and the pushing part 5027, so as to pry open the patient's mouth and preliminarily fix the navigation reference frame, and then the traction screw is screwed into the threaded hole in the middle of the fixing part 3 at the bottom of the main shaft 1, so as to fix the navigation reference frame to the patient's mandible.

[0032] Clinical application cases 1, patient position: The patient lies on the operating bed, the patient's body surface is covered with sterile cloth, the mandibular surgical site is exposed to the outside, and the patient is anesthetized and other preliminary preparation work is performed according to the needs of the operation; 2, preparation work: The patient's mouth is pried open with a retractor and other instruments to observe the surgical site and the maximum opening area of the patient's mouth, and the telescopic part 501 of the navigation reference frame is adjusted in rotation according to the patient's mouth; 3, the patient's mouth is pried open: The navigation reference frame is placed along the patient's mouth, and when placed, the two silica gel support rings 5022 are ensured to be opposite the positions on both sides of the patient's mouth, then the driving member 503 is started to make the telescopic part 501 elongate, and the patient's mouth is pried open on both sides by the prying part 502, when the telescopic part 501 continues to elongate, the driving member 503 is locked by the self-adaptive locking member 504 to stop the telescopic part 501 from elongating, at this time the patient's mouth can be completely pried open by the telescopic frame 501 and the prying part 502; 4, fixation of the navigation reference frame: The traction screw is screwed into the mounting hole in the middle of the fixing part 3 until the traction screw pierces the plurality of positioning pins at the bottom of the fixing part 3 into the patient's mandible to fix the navigation reference frame, and then the operation on the patient's mandible can be performed.

[0033] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application, and various changes and improvements can be made without departing from the spirit and scope of the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An improved mandibular navigation reference frame, comprising a main shaft (1), wherein a navigation reference component (2) and a fixing component (3) are respectively provided at the top and bottom of the main shaft (1), characterized in that: Also includes: The mouth opening component (4) is arranged on the main shaft (1) and is used to open the patient's mouth to achieve fixation of the navigation reference frame.

2. The improved mandibular navigation reference frame according to claim 1, characterized in that: The mouth opening assembly (4) comprises: An opening portion (5) is rotatably mounted on the main shaft (1) and is used to open the patient's mouth; The locking portion (6) is provided at the connection between the opening portion (5) and the main shaft (1) and is used to lock or unlock the rotation adjustment of the opening portion (5).

3. The improved mandibular navigation reference frame according to claim 2, characterized in that: The expansion portion (5) comprises: A telescopic member (501) is rotatably mounted on the main shaft (1) and is used to push the opening member (502) to open the patient's mouth; An opening member (502) is provided at one end of the telescopic member (501) away from the main shaft (1), and is used to cooperate with the telescopic member (501) to open the patient's mouth; A driving member (503) is provided in the telescopic member (501) and is used to drive the telescopic member (501) to achieve length adjustment; The adaptive locking component (504) is arranged in the telescopic component (501) and is used to cooperate with the expansion component (502) to lock the driving component (503).

4. The improved mandibular navigation reference frame according to claim 3, characterized in that: The driving member (503) comprises: A coreless cup motor (5031) is disposed in the fixed end of the telescopic member (501) and is used to drive the driving nut (5032) to rotate, thereby providing power for adjusting the length of the telescopic member (501); The driving screw (5033) is threadedly connected to the driving nut (5032). One end of the driving screw (5033) is rotatably arranged in the movable end of the telescopic member (501). The driving screw (5033) is used to cooperate with the driving nut (5032) thread to drive the telescopic member (501) to adjust its length.

5. The improved mandibular navigation reference frame according to claim 4, characterized in that: The expansion member (502) comprises: A mounting frame (5021) is provided at the movable end of the telescopic member (501); A support plate (5023) is provided in the mounting frame (5021), and a support plate reset member (5024) is provided between the support plate (5023) and the inner wall of the mounting frame (5021), and a silicone support ring (5022) is provided at the movable end of the support plate (5023); An adjusting lever (5026) is rotatably disposed within the mounting frame (5021), with a portion of the adjusting lever (5026) being located between the support plate (5023) and the inner wall of the mounting frame (5021); A silicone support block (5025) is provided on the outer wall of the mounting frame (5021), and a pusher (5027) is provided between the silicone support block (5025) and the adjustment lever (5026), wherein the pusher (5027) crosses the side wall of the mounting frame (5021).

6. The improved mandibular navigation reference frame according to claim 5, characterized in that: When the silicone support ring (5022) is squeezed, the support plate (5023) moves inside the mounting frame (5021) toward the adjustment lever (5026), squeezing the adjustment lever (5026) to rotate, and squeezing (5027) pushes the silicone support block (5025) to deform.

7. The improved mandibular navigation reference frame according to claim 6, characterized in that: The adaptive locking member (504) comprises; a pair of locking blocks (5041) slidably disposed within the telescopic member (501) and configured to stop the driving nut (5032) from rotating by friction; A limit block (5042) is slidably disposed within the telescopic member (501). The limit block (5042) is connected to the support plate (5023) via a connecting rod (5043). When the limit block (5042) slides along the telescopic member (501), it drives a pair of locking blocks (5041) to fit onto the outside of the drive nut (5032) to stop the rotation of the drive nut (5032).

8. The improved mandibular navigation reference frame according to claim 7, characterized in that: When the support plate (5023) moves in the mounting frame (5021), the connecting rod (5043) drives the limit block (5042) to slide laterally along the center line of the pair of locking blocks (5041), and drives the pair of locking blocks (5041) to slide and fit to the upper and lower sides of the drive nut (5032) to lock the drive nut (5032).

9. The improved mandibular navigation reference frame according to claim 8, characterized in that: The locking portion (6) comprises: A fixed ring (601) is sleeved on the main shaft (1), wherein a sliding ring (602) sleeved on the main shaft (1) is elastically slidably provided in the fixed ring (601); The top of the sliding ring (602) passes through the fixing ring (601) and is connected to the fixed end of the telescopic member (501).

10. The improved mandibular navigation reference frame according to claim 9, characterized in that: The lower portion of the top of the fixed ring (601) and the upper portion of the bottom of the sliding ring (602) are respectively provided with mutually cooperating limiting tooth grooves (603); A sliding ring reset member (604) for resetting the sliding ring (602) is also provided in the fixed ring (601).

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