An electronic facial arch mandibular sensor structure

Abstract

An electronic facial bow mandibular sensor structure includes a mandibular fork and a sensor disposed on the mandibular fork. The mandibular fork includes a first structure and a second structure connected to the first structure. The first structure is fixed to the teeth, and the sensor is disposed on the second structure. The second structure has several positioning holes for positioning the sensor. The sensor has a magnet that is magnetically connected to the second structure, and the sensor has several positioning pins that cooperate with the positioning holes. Compared with the prior art, the sensor is directly integrated into the mandibular fork, which can be fixed to the teeth, through magnetic attraction and positioning pin structure, eliminating the need for a bulky external support, greatly shortening the distance between the sensor and the mandibular motion center, effectively reducing the leverage amplification effect and error in the measurement process, and enabling more realistic and accurate capture of the three-dimensional motion trajectory of the mandible.

Description

Technical Field

[0001] This utility model relates to the field of oral medical and dental measurement equipment technology, specifically to an electronic facial arch mandibular sensor structure. Background Technology

[0002] A facebow is a crucial dental instrument used to precisely record the spatial relationship between a patient's maxillary teeth and the temporomandibular joint, and then transfer this relationship to the dental articulator. The electronic facebow, by inducing repeated opening and closing movements of the patient, uses sensors to precisely track and calculate the personalized hinge axis position, achieving a level of accuracy far exceeding traditional estimation methods. The electronic facebow can record the three-dimensional trajectory of the mandible during various functional movements, including protrusion, lateralization, and mouth opening and closing. This dynamic data, containing the patient's personalized movement characteristics, is crucial for the design of prostheses.

[0003] The electronic facebow mandibular sensor is a core component for achieving precise jaw relationship transfer and dynamic functional analysis. Its successful application will greatly promote the digitalization of oral restoration, implantology, orthodontics, and temporomandibular joint disorder diagnosis and treatment, providing patients with more predictable, comfortable, and superior personalized restorative solutions with better occlusal function.

[0004] Chinese Patent Application No. 202023126253.3 discloses a mandibular position motion recording device and a mandibular position motion recording system. The disclosed mandibular position motion recording device includes a head support, a mandibular support, an electromagnetic generator, and an electromagnetic sensor. The head support includes: a head support body; a head fixing member connected to the head support body; an electromagnetic generator base fixed to the head support body and located outside the subject's oral cavity, with the electromagnetic generator located on the electromagnetic generator base; and multiple head support radiation marker components disposed on the electromagnetic generator base. The mandibular support includes: a mandibular fixing member; an electromagnetic sensor base connected to the mandibular fixing member and located outside the subject's oral cavity, with the electromagnetic sensor fixedly located on the electromagnetic sensor base; and multiple mandibular support radiation marker components made of radiation-shielding material disposed on the electromagnetic sensor base. German patent application DE202023000465U1 discloses an accessory for connecting a motion sensor. This accessory primarily includes: a dental fixing component with a lateral extension formed by printing or milling; a sensor support component; and a slider with a flat, clamp-like extension. The position / motion sensor is detachably fixed to the slider by a magnetic element. The entire slider is made of ferromagnetic material, while the position / motion sensor contains a corresponding magnet.

[0005] In the aforementioned prior art, sensors are typically fixed to the outside of the oral cavity via a complex support system. This external fixation method increases the lever distance and relative displacement between the sensor and the actual center of mandibular movement, introducing measurement errors. Furthermore, the bulky external support structure severely affects patient comfort and natural movement, making it difficult to capture the true mandibular movement trajectory. In addition, the sensor fixation structure lacks an effective mechanical positioning mechanism, relying solely on magnetic adsorption or simple insertion, which is prone to micro-movements or displacements during oral movement, affecting the accuracy of the movement trajectory data. Utility Model Content

[0006] The present invention aims to overcome the defects in the prior art and provide an electronic facial arch mandibular sensor structure that is simple in structure, ensures that the sensor can be quickly and repeatedly installed and removed, and maintains extremely high positioning accuracy at all times.

[0007] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: an electronic facial bow mandibular sensor structure, including a mandibular fork and a sensor disposed on the mandibular fork, the mandibular fork including a first structure and a second structure connected to the first structure, the first structure being fixed to the teeth, the sensor being disposed on the second structure, the second structure being provided with a plurality of positioning holes for positioning the sensor; the sensor being provided with a magnet magnetically connected to the second structure, and the sensor being provided with a plurality of positioning pins cooperating with the positioning holes.

[0008] As a preferred embodiment of this utility model, the sensor is provided with a plurality of reflective points, which are evenly distributed on the upper surface of the sensor.

[0009] In a preferred embodiment of this invention, the magnet and several positioning pins are disposed on the lower surface of the sensor.

[0010] As a preferred embodiment of the present invention, the first structure includes a connecting part and a fixing part disposed at both ends of the connecting part. The fixing part is bent and connected to the opposite ends of the connecting part, and a fixing space is formed between the two fixing parts.

[0011] As a preferred embodiment of this utility model, the fixing part is provided with a plurality of glue leakage holes, which are equidistantly distributed along the length direction of the fixing part, and the glue leakage holes are configured as elliptical structures with their major axis parallel to the length direction of the fixing part.

[0012] As a preferred embodiment of the present invention, the fixing part is provided with a plurality of bending grooves on both sides, the plurality of bending grooves are provided on the two sides of the fixing part, the plurality of bending grooves are provided along the length direction of the fixing part, and the plurality of bending grooves are configured as an arc-shaped structure.

[0013] As a preferred embodiment of this utility model, the bending grooves and the adhesive leakage holes are distributed at intervals.

[0014] As a preferred embodiment of this utility model, the two ends of the connecting part are provided with connecting grooves that connect to the sides of the fixing part, and the connecting grooves are arc-shaped.

[0015] As a preferred embodiment of this utility model, the connecting part is provided with a mounting groove for connecting the second structure, and the second structure is inserted into the mounting groove.

[0016] As a preferred embodiment of the present invention, the second structure includes a connector and a mounting part, the connector being inserted into the mounting groove, and a plurality of positioning holes being provided at the corners of the mounting part.

[0017] Compared with the prior art, the beneficial effects of this utility model are: 1. The sensor is directly integrated into the mandibular fork, which can be fixed to the teeth, through a magnetic attraction and positioning pin structure. This eliminates the need for a bulky external support and greatly shortens the distance between the sensor and the center of mandibular movement. This effectively reduces the leverage amplification effect and errors during the measurement process, enabling more realistic and accurate capture of the three-dimensional movement trajectory of the mandible. Furthermore, the composite connection design of magnetic attraction and positioning pin and positioning hole enables rapid alignment and installation of the sensor. The magnet provides the main attraction force, enabling rapid pre-positioning and convenient disassembly. The precise fit between the positioning pin and the positioning hole ensures absolute accuracy in the circumferential and angular positioning of the sensor, effectively preventing minor rotations and offsets, and ensuring consistent position height for each installation, greatly improving the repeatability and reliability of the measurement data. 2. Furthermore, multiple reflective points are evenly distributed on the upper surface of the sensor, which can efficiently reflect the incident light back to the direction of the light source along the original path, significantly improving the signal-to-noise ratio and data capture accuracy of the optical tracking system; 3. Furthermore, the bending groove design on the first structure of the mandibular fork allows doctors to easily bend it manually according to the patient's dental arch shape, enabling the entire device to achieve personalized adaptation and ensuring a tight and stable fit with the teeth. This not only improves the fixation stability and avoids shaking during the measurement process, but also greatly increases the patient's wearing comfort, allowing them to complete the motion trajectory recording in a natural state and obtain more accurate data. 4. Furthermore, the design of the adhesive leakage hole on the fixing part allows the adhesive to penetrate through it, forming a strong mechanical lock after curing. This allows the mandibular fork to be directly and firmly fixed to the teeth without relying on any external auxiliary devices, simplifying the operation steps and providing a retention effect far exceeding that of planar bonding. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the sensor of this utility model; Figure 3 This is a schematic diagram of the mandibular fork structure of this utility model; Figure 4 This is a structural diagram of the first structure; Figure 5 This is a schematic diagram of the second structure. Reference numerals: First structure 1, connecting part 101, mounting groove 1011, connecting groove 1012, fixing part 102, glue leakage hole 1021, bending groove 1022, fixing space 103; Second structure 2, connecting piece 201, mounting part 202, positioning hole 2021, chin fork 3, sensor 4, magnet 401, positioning pin 402, reflective point 403. Detailed Implementation

[0019] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0020] like Figures 1-5 As shown, an electronic facial bow mandibular sensor structure includes a mandibular fork 3 and a sensor 4 disposed on the mandibular fork 3. The mandibular fork 3 includes a first structure 1 and a second structure 2 connected to the first structure 1. The first structure 1 is fixed to the teeth, and the sensor 4 is disposed on the second structure 2. The second structure 2 is provided with a plurality of positioning holes 2021 for positioning the sensor 4. The sensor 4 is provided with a magnet 401 that is magnetically connected to the second structure 2, and the sensor 4 is provided with a plurality of positioning pins 402 that cooperate with the positioning holes 2021.

[0021] Furthermore, the second structure 2 is used to install the measuring marker and is positioned through the positioning holes 2021, thereby achieving precise fixation of the marker and improving measurement accuracy. The first structure 1 is fixed to the tooth, and the fixing part 102 is fixed to the tooth by adhesive materials such as resin or silicone rubber. The sensor 4 is magnetically attracted to the second structure 2 by the magnet 401, and the second structure 2 is provided with several positioning holes 2021. The sensor 4 is provided with positioning pins 402 that cooperate with the positioning holes 2021. Through the composite connection design of the magnet 401 adsorption and the positioning pins 402 cooperating with the positioning holes 2021, the sensor 4 can be quickly aligned and installed. The magnet 401 provides the main adsorption force to achieve quick pre-positioning and convenient disassembly. The precise cooperation between the positioning pins 402 and the positioning holes 2021 ensures the absolute precision positioning of the sensor 4 in the circumferential and angular directions, effectively preventing minor rotation and offset, ensuring consistent position height for each installation, and greatly improving the repeatability and reliability of the measurement data.

[0022] The sensor 4 is provided with a number of reflective points 403, which are evenly distributed on the upper surface of the sensor 4. Furthermore, the reflective points 403 are coated with a reflective coating. The reflective coating of the reflective points 403 can efficiently reflect the incident light back to the direction of the light source along the original path, which can significantly improve the signal-to-noise ratio and data capture accuracy of the optical tracking system.

[0023] A magnet 401 and several positioning pins 402 are disposed on the lower surface of the sensor 4. Furthermore, the magnet 401 is disposed in the middle of the lower surface of the sensor 4, the position of the positioning pins 402 corresponds to the position of the positioning hole 2021, and several positioning pins 402 are disposed around the magnet 401.

[0024] The first structure 1 includes a connecting part 101 and fixing parts 102 disposed at both ends of the connecting part 101. The fixing parts 102 are bent and connected to the opposite ends of the connecting part 101. A fixing space 103 is formed between the two fixing parts 102. Furthermore, an angle is formed between the fixing parts 102 and the connecting part 101, which is greater than 90 degrees. The fixing space 103 formed between the two fixing parts 102 is adapted to the shape of the entire tooth, thereby making it easier for the fixing parts 102 to fit on the tooth.

[0025] The fixing part 102 is provided with a plurality of glue leakage holes 1021, which are equidistantly distributed along the length direction of the fixing part 102. Each glue leakage hole 1021 is elliptical in shape, with its major axis parallel to the length direction of the fixing part 102. Furthermore, the glue leakage holes 1021 are located in the middle of the fixing part 102, and the plurality of glue leakage holes 1021 are equidistantly and evenly distributed along the length direction of the fixing part 102. The glue leakage holes 1021 are elliptical in shape, with their major axes aligned with the length direction of the fixing part 102, such that the length of each glue leakage hole 1021 is parallel to the length direction of the fixing part 102. The length of part 102 is parallel, and the glue leakage hole 1021 is elliptical with its major axis arranged along the length of part 102. This provides maximum adhesive retention force while ensuring structural strength. Excess glue overflows through the glue leakage hole 1021 and flows to the outer wall of part 102, where it cures in the glue leakage hole 1021 and on the outer wall of part 102. After curing, a strong mechanical locking effect is formed, which firmly and directly bonds the mandibular fork to the patient's teeth without the need for auxiliary structures.

[0026] The fixing part 102 has several bending grooves 1022 on both sides. The bending grooves 1022 are located on the two sides of the fixing part 102 and are arranged along the length of the fixing part 102. The bending grooves 1022 are arc-shaped. Furthermore, the bending grooves 1022 and the glue leakage holes 1021 are distributed alternately. The bending grooves 1022 adopt an arc design and are distributed alternately with the glue leakage holes 1021, which makes the bending operation smoother and easier to control the bending point and bending angle. At the same time, it avoids the concentration of structural weak points caused by grooving, ensuring that the fixing part 102 bends more smoothly and extends the service life of the product. By setting the bending grooves 1022 on both sides of the fixing part 102, it is convenient to bend the fixing part 102, thereby making the fixing part 102 more adaptable to the shape of the teeth and ensuring that the fixing part 102 can be firmly fixed to the teeth.

[0027] The connecting part 101 has connecting grooves 1012 on both sides that connect to the sides of the fixing part 102. The connecting grooves 1012 are arc-shaped. Furthermore, the connecting grooves of the connecting part 101 are arc-shaped. Furthermore, the connecting part 101 and the fixing part 102 are integrally formed. The structure of the connecting grooves 1012 is the same as that of the bending grooves 1022. The connecting grooves 1012 are provided on the two sides of the connecting part 101 at opposite ends. The connecting grooves 1012 optimize the stress distribution at the connection between the fixing part 102 and the connecting part 101, making the bending smoother and preventing breakage between the fixing part 102 and the connecting part 101.

[0028] The connecting part 101 is provided with a mounting groove 1011 for connecting the second structure 2. The second structure 2 is inserted into the mounting groove 1011. Further, the mounting groove 1011 is a rectangular structure and is located in the middle of the connecting part 101. The second structure 2 includes a connector 201 and a mounting part 202. The connector 201 is inserted into the mounting groove 1011. A plurality of positioning holes 2021 are provided at the corners of the mounting part 202. The connector 201 is a plate-shaped structure and is inserted into the mounting groove 1011. In addition, the mounting part 202 is a triangular structure. One end of the connector 201 is connected to one corner of the mounting part 202. A plurality of positioning holes 2021 are provided at the corners of the mounting part 202, specifically at the three corners of the mounting part 202.

[0029] In addition, the ends of the mounting part 202 and the fixing part 102 are both designed with arc-shaped structures to avoid causing harm to the patient during use.

[0030] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0031] Although this document frequently uses reference numerals from the figures, such as first structure 1, connecting part 101, mounting groove 1011, connecting groove 1012, fixing part 102, glue leakage hole 1021, bending groove 1022, fixing space 103, second structure 2, connecting piece 201, mounting part 202, positioning hole 2021, chin fork 3, sensor 4, magnet 401, positioning pin 402, reflective point 403, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An electronic facial arch mandibular sensor structure, comprising a mandibular fork (3) and a sensor (4) disposed on the mandibular fork (3), characterized in that, The mandibular fork (3) includes a first structure (1) and a second structure (2) connected to the first structure (1). The first structure (1) is fixed to the teeth, and the sensor (4) is disposed on the second structure (2). The second structure (2) is provided with a plurality of positioning holes (2021) for positioning the sensor (4). The sensor (4) is provided with a magnet (401) that is magnetically connected to the second structure (2), and the sensor (4) is provided with a plurality of positioning pins (402) that cooperate with the positioning holes (2021).

2. The electronic facial arch mandibular sensor structure according to claim 1, characterized in that, The sensor (4) is provided with a number of reflective points (403), which are evenly distributed on the upper surface of the sensor (4).

3. The electronic facial arch mandibular sensor structure according to claim 1, characterized in that, The magnet (401) and several positioning pins (402) are disposed on the lower surface of the sensor (4).

4. The electronic facial arch mandibular sensor structure according to claim 1, characterized in that, The first structure (1) includes a connecting part (101) and a fixing part (102) disposed at both ends of the connecting part (101). The fixing part (102) is bent and connected to the opposite ends of the connecting part (101), and a fixing space (103) is formed between the two fixing parts (102).

5. The electronic facial arch mandibular sensor structure according to claim 4, characterized in that, The fixing part (102) is provided with a plurality of glue leakage holes (1021). The glue leakage holes (1021) are equidistantly distributed along the length direction of the fixing part (102). The glue leakage holes (1021) are configured as elliptical structures with their major axis parallel to the length direction of the fixing part (102).

6. The electronic facial arch mandibular sensor structure according to claim 5, characterized in that, The fixing part (102) has several bending grooves (1022) on both sides. The bending grooves (1022) are arranged on the two sides of the fixing part (102), and the bending grooves (1022) are arranged along the length direction of the fixing part (102). The bending grooves (1022) are arranged in an arc shape.

7. The electronic facial arch mandibular sensor structure according to claim 6, characterized in that, Several bending grooves (1022) and several glue leakage holes (1021) are distributed at intervals.

8. The electronic facial arch mandibular sensor structure according to claim 4, characterized in that, The connecting part (101) has connecting grooves (1012) on both sides that connect to the side of the fixing part (102), and the connecting grooves (1012) are arc-shaped.

9. The electronic facial arch mandibular sensor structure according to claim 4, characterized in that, The connecting part (101) is provided with a mounting groove (1011) for connecting the second structure (2), and the second structure (2) is inserted into the mounting groove (1011).

10. The electronic facial arch mandibular sensor structure according to claim 9, characterized in that, The second structure (2) includes a connector (201) and a mounting part (202). The connector (201) is inserted into the mounting groove (1011), and a plurality of positioning holes (2021) are provided at the corners of the mounting part (202).

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