CBCT (cone beam computed tomography) imaging equipment for oral examination and use method

Abstract

The invention relates to the technical field of oral cavity examination, in particular to a CBCT image device for oral cavity examination and a using method.The CBCT image device for oral cavity examination comprises a lift provided with a CBCT bulb tube head and a sensor, and the lift is provided with a chin supporting table fixedly installed in the middle of the lift, and the sensor rotates by 360 degrees in an oral cavity through a steering end; four wireless image pick-up devices are uniformly distributed on the steering end head, and a movable spray head which is used for spraying a contrast agent and an auxiliary agent into the oral cavity to be matched with the CBCT bulb tube head for use is movably mounted in the steering end head. The chin supporting table is arranged on the elevator, the display and the sensor are arranged through the extension frame and the embedded pipeline in the chin supporting table respectively, the sensor is held in the mouth through the embedded pipeline, and a marking auxiliary agent which is specifically bromocresol green is adopted, so that a contrast agent can display color change; and a CBCT bulb tube head is combined to observe a mixture prepared from a contrast agent and an auxiliary agent, so that a visual and accurate judgment basis is provided for diagnosis and treatment analysis.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of oral examination, in particular to a CBCT image equipment for oral examination and a use method thereof. BACKGROUND

[0002] The precise diagnosis of oral medicine cannot be separated from advanced imaging technology, among which cone beam computed tomography (CBCT) is a revolutionary breakthrough in the field of oral imaging in the past decade. CBCT can provide three-dimensional images with millimeter-level precision, clearly showing the spatial relationship of anatomical structures such as teeth, alveolar bone, nerve canal, maxillary sinus, etc., and providing key decision-making basis for implant restoration, orthodontic correction, impacted tooth extraction and other treatments.

[0003] The existing CBCT image equipment such as the CBCT equipment with intraoral digital X-ray image proposed in application No. CN202010274823.9 increases an electric motor capable of adjusting the angle of the CBCT ball tube head in the middle of the CBCT ball tube head, and presets different positions, different angles, patients of different ages and different exposure conditions. The positioning mechanism for the oral CBCT device and the oral CBCT device proposed in application No. CN201910790481.3 are provided with a shaft hole in the front end face of the shell, a through hole penetrating the front end face and the rear end face of the connecting seat, a rotating shaft installed in the shaft hole through the through hole, and the rotating shaft and the through hole are rotatably connected. The plunger can be a ball head plunger, and the ball head plunger is elastically pressed against the rear end face of the connecting seat to rotate. However, the oral tissue structure is complex, simple angle adjustment is difficult to observe the oral cavity in all directions, and even the adjustment range is limited due to the narrow space, which seriously affects the comprehensiveness and integrity of information collection. Although the technology of using contrast agent to improve the checking accuracy is adopted, such as the method for making contrast agent penetrate into the crack under the assistance of vacuum for the in-vitro cracked tooth proposed in application No. CN202010146957.2, the flowability and X-ray resistance of iodine pholoxine are used to penetrate into the structural crack of the tooth under the condition of vacuum, and the detection rate of CBCT for the fine crack of the tooth is increased. However, the non-ionic iodine contrast agent of this type has the characteristics of strong flowability, and it is difficult to accurately observe it by the CBCT image equipment if the flow of the contrast agent cannot be inhibited or effectively controlled. The normal dentin is covered by enamel or cementum, the contrast agent cannot be combined with it, if there is a hidden leak in the mucosa around the implant, such as submucosal fistula, there is no obvious pus on the surface, the contrast agent may not be accurately positioned, and even repeated scanning by the CBCT image equipment is required. Moreover, the common contrast agent cannot show the time sequence of the penetration of the contrast agent, it is difficult to judge whether the leak is active or not, and if it is active, it is also difficult to distinguish whether the fistula is old and closed or still leaking. During the whole examination process, a certain time is required, if the examination needs to be performed with the aid of the contrast agent, repeated injection is required, which not only wastes time and effort, but also is easy to cause errors due to the front and rear operations at different time points, affects the judgment and treatment effect, and is easy to cause secondary harm to the patient. SUMMARY

[0004] The purpose of the present application is to solve the problem of lack of accuracy caused by inconvenient operation of traditional CBCT image equipment in collecting oral tissue structure information in the prior art, and to propose a CBCT image equipment for oral examination and a use method.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme:

[0006] A CBCT image equipment for oral examination, comprising an elevator provided with a CBCT ball tube head and a sensor, the elevator is provided with:

[0007] A chin support table is fixedly installed at a middle position of the lifting machine, and a display connected with the sensor electric signal is arranged on the lifting machine;

[0008] The sensor enters the oral cavity through the chin support table entrance, and the sensor comprises:

[0009] A fixed pile is fixedly embedded in the chin support table;

[0010] A steering end seat is movably connected to the fixed pile, and the sensor deflects up and down and left and right in the oral cavity through the steering end seat;

[0011] A steering end head is rotatably connected to the steering end seat, and the sensor rotates 360° in the oral cavity through the steering end head, four wireless cameras are uniformly distributed on the steering end head, and a movable nozzle for injecting contrast medium and auxiliary agent into the oral cavity to cooperate with the CBCT ball tube head is movably installed in the steering end head.

[0012] Preferably, the chin support table comprises:

[0013] An extension frame is fixedly installed at a middle position of the lifting machine, and the display is fixedly installed on the extension frame;

[0014] An embedded pipeline is fixedly installed on the extension frame, and the embedded pipeline is open at the top end, and the fixed pile is horizontally embedded in the embedded pipeline.

[0015] Preferably, a first universal adjuster is arranged between the fixed pile and the steering end seat.

[0016] Preferably, the first universal adjuster comprises:

[0017] A ball groove is formed in the front end of the fixed pile;

[0018] A steering ball is movably sleeved in the ball groove, and the steering ball is fixedly connected with the steering end seat.

[0019] Preferably, a second universal adjuster is arranged between the steering end seat and the steering end head.

[0020] Preferably, the second universal adjuster comprises a limiting inner flange integrally connected to an opening position of the steering end seat, and an opening position of the steering end head is integrally connected with a limiting outer flange movably sleeved on the limiting inner flange.

[0021] Preferably, the sensor is provided with a supply agent part in the steering end seat and the steering end head for driving the movable nozzle to cooperate with the CBCT ball tube head to adjust the extension and rotation.

[0022] Preferably, the supply agent part comprises:

[0023] a first hose, the first hose being movably penetrated through the steering end base and extending into the steering end head, and the first hose being used for supplying contrast agent for the mobile spray head;

[0024] a second hose, the second hose being movably penetrated through the steering end base and extending into the steering end head, and the second hose being used for supplying auxiliary agent for the mobile spray head;

[0025] a mixing barrel, the mixing barrel being movably installed in the steering end head, one end of the mixing barrel being connected with the first hose and the second hose, and the other end of the mixing barrel being connected with the mobile spray head.

[0026] Preferably, the contrast agent refers to iohexol, and the auxiliary agent refers to modified chitosan and bromocresol green.

[0027] The use method of the CBCT image equipment for oral examination, the use method comprises the following steps:

[0028] Step S1, the sensor is fixed on the embedded pipeline through the fixing pile, the patient assumes an end base posture and holds the sensor in the mouth, and the steering end head, the steering end base and the front end of the fixing pile are all included;

[0029] Step S2, the first universal adjuster is controlled to operate, so that the steering end base is deflected with the fixing pile as the fulcrum, the second universal adjuster is controlled to operate, so that the steering end head is rotated with the steering end base as the fulcrum, the wireless camera is used to obtain image information in the oral cavity, the first hose is controlled to provide contrast agent and the second hose is controlled to provide auxiliary agent through the CBCT ball tube head, so that the contrast agent and the auxiliary agent are mixed in the mixing barrel to form a mixed agent;

[0030] Step S3, the mixing barrel is controlled to be telescoped in the steering end head, the mixed agent is injected into a designated position in the oral cavity through the mobile spray head, and the distribution of the mixed agent in the oral cavity is observed through the CBCT ball tube head after the first and second uses.

[0031] Compared with the prior art, the present application has the following advantages:

[0032] 1、The chin support table is arranged on the elevator, the display and the sensor are arranged in the extension frame and the embedded pipeline respectively, the sensor is held in the mouth through the embedded pipeline, and information collection operation of the sensor in the oral cavity is facilitated.

[0033] 2、The sensor main body is composed of the fixing pile, the steering end base and the steering end head provided with the wireless camera, the first universal adjuster is used for realizing step-by-step deflection adjustment of the steering end base, and the second universal adjuster is used for realizing 360° rotation adjustment of the steering end head, so that the wireless camera can perform multidirectional and angular information collection operation in the oral cavity.

[0034] 3、The first hose and the second hose for conveying the contrast agent and the auxiliary agent are arranged, and the contrast agent and the auxiliary agent are mixed by using the mixing barrel, wherein the retention auxiliary agent, specifically modified chitosan, is used, so that the contrast agent can be combined with the damaged tissue in the oral cavity, the marking auxiliary agent, specifically bromocresol green, is used, so that the contrast agent at different stages can show color change, the change of the oral cavity in a specific time period is judged, the mixed agent made of the contrast agent and the auxiliary agent is observed by using the CBCT ball tube head, and the intuitive and accurate judgment basis is provided for diagnosis and treatment analysis. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 A structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0036] Figure 2 A bottom view of a CBCT image equipment for oral examination is provided for the present application.

[0037] Figure 3 A pipe embedding structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0038] Figure 4 A display screen and sensor structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0039] Figure 5 A sensor structure upper section schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0040] Figure 6 A sensor structure side section schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0041] Figure 7 A first universal adjuster structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0042] Figure 8 A second universal adjuster structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0043] Figure 9 A supply agent part structure schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0044] Figure 10 An A part structure enlarged schematic view of a CBCT image equipment for oral examination is provided for the present application.

[0045] In the drawings:

[0046] 1, elevator; 2, U-shaped load carrier; 3, CBCT tube head; 4, display;

[0047] 5, chin support table; 51, extension frame; 52, embedded pipe;

[0048] 6, sensor;

[0049] 61, fixed pile; 62, steering end seat; 63, steering end head;

[0050] 64, first universal adjuster; 641, first rotating shaft; 642, second rotating shaft; 643, first gear; 644, driven gear column; 645, traction slider; 646, H-shaped pulley disc; 647, strong suction cup; 648, steering ball;

[0051] 65, second universal adjuster; 651, limiting support; 652, third rotating shaft; 653, second gear; 654, driven gear;

[0052] 66, agent supply part; 661, first hose; 662, second hose; 663, driver; 664, booster disc; 665, moving slider; 666, elastic telescopic rod; 667, mixing cylinder; 668, moving spray head; 669, heater. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0054] Reference Figures 1-10 A CBCT image device for oral examination, comprising an elevator 1 provided with a CBCT tube head 3 and a sensor 6. It should be noted that the elevator 1 is fixedly arranged on the ground or a base provided with a locking wheel. A seat is arranged on the ground or the base to provide a sitting position for the patient. A limiter for abutting against the forehead of the patient is arranged on the elevator 1. A pupil level calibrator is also arranged to correct the sitting posture of the patient. The patient can look straight ahead, and the CBCT tube head 3 can be provided with a position coordinate. The CBCT tube head 3 can establish a coordinate system for the oral tissue structure of the patient.

[0055] The elevator 1 is provided with a U-shaped load carrier 2 and a chin support table 5.

[0056] The D-shaped load carrier 2 is fixedly installed on the elevator 1, and the CBCT ball tube head 3 is fixedly installed on one side of the D-shaped load carrier 2. It should be noted that the D-shaped load carrier 2 is vertically lifted under the driving action of the elevator 1, so as to be adjusted according to the patient, and a driving motor adapted to the CBCT ball tube head 3 is further arranged on the D-shaped load carrier 2, so that the CBCT ball tube head 3 can be bidirectionally deflected and adjusted on the D-shaped load carrier 2. The CBCT ball tube head 3 is provided with a radiation window ball tube support, and the radiation window ball tube support is provided with a shooting support for carrying the sensor 6 in an idle state. This is a prior art in the technical field to which the present technology belongs, and therefore will not be described in detail.

[0057] The chin support table 5 is fixedly installed at the middle position of the elevator 1, and the display 4 electrically connected with the sensor 6 is arranged on the elevator 1. The two are connected by wires to ensure the stability of signal output. The chin support table 5 includes an extension frame 51 and an embedded pipe 52.

[0058] The extension frame 51 is fixedly installed at the middle position of the elevator 1, and the display 4 is fixedly installed on the extension frame 51. The extension frame 51 is synchronously adjusted by the driving action of the elevator 1.

[0059] The embedded pipe 52 is fixedly installed on the extension frame 51, and the top end of the embedded pipe 52 is open. It should be noted that the embedded pipe 52 is made of food hygiene grade polyurethane material to ensure the cleanliness of oral hygiene and has plasticity to clamp the sensor 6 in work.

[0060] The sensor 6 enters the oral cavity through the chin support table 5, and the sensor 6 includes a fixed stake 61, a steering end seat 62, and a steering end head 63.

[0061] The fixed stake 61 is fixedly embedded in the embedded pipe 52 of the chin support table 5. The patient holds the sensor 6 and part of the embedded pipe 52 by mouth to check the oral cavity by using the sensor 6.

[0062] The steering end seat 62 is movably connected to the fixed stake 61, and the sensor 6 is deflected up and down and left and right in the oral cavity through the steering end seat 62. A first universal adjuster 64 is arranged between the fixed stake 61 and the steering end seat 62. The first universal adjuster 64 includes a first rotating shaft 641, a second rotating shaft 642, a traction sliding block 645, an H-shaped pulley disc 646, a strong suction cup 647, a ball groove, and a steering ball 648.

[0063] The first rotating shaft 641 is rotatably installed in the fixed pile 61, the fixed pile 61 is fixedly provided with a first micro motor for driving the first rotating shaft 641 to rotate, the first rotating shaft 641 is key-connected with a first gear 643, the second rotating shaft 642 is rotatably installed in the fixed pile 61, and the second rotating shaft 642 is key-connected with a driven gear column 644 engaged with the first gear 643. It should be noted that the thickness value of the driven gear column 644 is three times the thickness value of the first gear 643, and during the movement of the second rotating shaft 642, the driven gear column 644 and the first gear 643 are always engaged.

[0064] The traction sliding block 645 is slidably installed in the fixed pile 61, the fixed pile 61 is provided with an automatic telescopic device for driving the traction sliding block 645 to move linearly, and is provided with a guide rail for slidably installing the traction sliding block 645.

[0065] The H-shaped pulley disc 646 is fixedly sleeved on the second rotating shaft 642, and the H-shaped pulley disc 646 is movably sleeved on the traction sliding block 645, by driving the traction sliding block 645 to move linearly, the second rotating shaft 642 is telescopic with the H-shaped pulley disc 646.

[0066] The strong suction cup 647 is fixedly connected to the second rotating shaft 642, the strong suction cup 647 telescopes with the second rotating shaft 642 to repeatedly contact the steering ball 648 in the ball groove, and after the contact, the state of the steering ball 648 in the ball groove is adjusted by deflection.

[0067] The ball groove is opened in the front end of the fixed pile 61, it should be noted that the ball groove is provided with an opening smaller than half of a spherical surface on one side, so as to connect the steering ball 648 with the steering end seat 62.

[0068] The steering ball 648 is movably sleeved in the ball groove, and the steering ball 648 corresponds to the strong suction cup 647, the steering ball 648 is fixedly connected with the steering end seat 62, by repeatedly switching the connection between the strong suction cup 647 and the steering ball 648 to drive the second rotating shaft 642 to deflect, the angle of the steering end seat 62 is adjusted, so that the steering end seat 62 is adjusted to deflect up and down and left and right in the oral cavity.

[0069] The steering end head 63 is rotatably connected to the steering end seat 62, and the sensor 6 rotates 360° within the oral cavity via the steering end head 63. Four wireless cameras are evenly distributed on the steering end head 63, and a movable nozzle 668 for spraying contrast agent and auxiliary agent into the oral cavity to cooperate with the CBCT tube head 3 is movably installed in the steering end head 63. A second universal adjuster 65 is provided between the steering end seat 62 and the steering end head 63. The second universal adjuster 65 includes a limiting inner flange integrally connected to the opening position of the steering end seat 62, and a limiting outer flange movably fitted onto the limiting inner flange integrally connected to the opening position of the steering end head 63. The second universal adjuster 65 also includes a limiting bracket 651, a third rotating shaft 652, and a driven gear 654.

[0070] The limit bracket 651 is fixedly installed inside the steering end seat 62;

[0071] The third rotating shaft 652 is rotatably mounted on the limiting bracket 651, and the third rotating shaft 652 is keyed to the second gear 653. The limiting bracket 651 is provided with a second micro motor for driving the third rotating shaft 652 to rotate.

[0072] The driven gear 654 is fixedly installed inside the steering end head 63, and the driven gear 654 is meshed with the second gear 653. The meshing transmission between the driven gear 654 and the second gear 653 causes the steering end head 63 to rotate around the steering end seat 62 as the fulcrum, which will further improve the structural flexibility of the sensor 6, allowing the wireless camera to observe the patient's oral tissue structure from a more suitable angle.

[0073] Both the first and second micro motors mentioned above are equipped with servo controllers to facilitate automated control.

[0074] Sensor 6 is provided with a supply section 66 within the steering end seat 62 and steering end head 63 for driving the movable nozzle 668 to cooperate with the CBCT tube head 3 for telescopic and rotational adjustment. The supply section 66 includes a first hose 661, a second hose 662, a driver 663, a pressure plate 664, a movable slider 665, an elastic telescopic rod 666, a mixing cylinder 667, and a heater 669.

[0075] The first hose 661 is movably arranged through the steering end base 62 and extends into the steering end head 63, and is used to supply contrast agent for the mobile spray head 668. The second hose 662 is movably arranged through the steering end base 62 and extends into the steering end head 63, and is used to supply auxiliary agent for the mobile spray head 668. It should be noted that the portions of the first hose 661 and the second hose 662 extending out of the steering end base 62 are embedded in the wall of the fixed pile 61, and the two are respectively connected with a contrast agent supplement tank and an auxiliary agent supplement tank, and the first hose 661 and the second hose 662 are respectively provided with electromagnetic valves to control the on-off of the contrast agent and the auxiliary agent.

[0076] The driver 663 is fixedly installed in the steering end head 63, and the driver 663 is provided with two or four to ensure symmetrical balanced traction.

[0077] The booster disc 664 is fixedly connected to the output end of the driver 663, and the booster disc 664 is moved in and out of the steering end head 63 under the traction of the driver 663.

[0078] The mobile slider 665 is slidingly installed in the steering end head 63, and the specific reference is made to the description of the drawing Figure 4 -attached Figure 6 The steering end head 63 is narrow in front and wide in back, which is convenient for the patient to hold in the mouth, and the internal cavity also adopts a structure of narrow in front and wide in back to ensure sufficient use space, so that the guide groove for slidingly installing the mobile slider 665 is inclined in the inner wall of the steering end head 63, and the number of the mobile slider 665 is two or four, which are symmetrically or circumferentially equidistantly distributed, so as to conveniently symmetrically support and install the mixing barrel 667.

[0079] The elastic telescopic rod 666 is movably sleeved in the mobile slider 665, and it should be noted that the elastic telescopic rod 666 is arranged to adapt to the space structure of the steering end head 63, so as to ensure that the mixing barrel 667 is always located at the center line position of the steering end head 63. It is worth noting that because the steering end head 63 can rotate 360° in the clockwise or counterclockwise direction, the first hose 661 and the second hose 662 have a structure that can meet the rotation requirement, or the first hose 661 and the second hose 662 are both rotationally connected with the mixing barrel 667, which can further improve the flexibility between the two, so that the steering end head 63 can be rotated and adjusted more than 360°.

[0080] The mixing cylinder 667 is movably installed in the steering end head 63, and the mixing cylinder 667 is fixedly connected with the elastic telescopic rod 666, one end of the mixing cylinder 667 is connected with the first hose 661 and the second hose 662, and the other end of the mixing cylinder 667 is connected with the movable spray head 668. The mixing cylinder 667 adopts a double-layer structure, so that the heater 669 can be built-in in the mixing cylinder 667, the contrast agent and the auxiliary agent are heated to 30-40 DEG C by the heater 669, the stimulation of the gum nerve caused by low temperature is avoided, and the use comfort of the contrast agent and the auxiliary agent is ensured.

[0081] The contrast agent is iohexol, and the auxiliary agent is modified chitosan and bromocresol green. On the basis of three-dimensional structure imaging, the tissue function information is synchronously acquired. After injection of a low-dose contrast agent, the blood perfusion of the periapical inflammatory area is analyzed by dynamic scanning of the CBCT tube head 3, and the inflammation activity is evaluated. The use of the contrast agent with bromocresol green is helpful to distinguish active inflammation from old lesions. The structure is upgraded to function, and reference is provided for clinical treatment plan.

[0082] Moreover, the use of the contrast agent makes the effect of the CBCT tube head 3 more intuitive and obvious, reduces useless scattered rays, improves photon capture efficiency, and obtains clearer images under the same dose or reduces the dose under the same clarity.

[0083] It is worth noting that the CBCT tube head 3 scanning can clearly see the point-like or linear high-density developing area, directly locate the specific position and aperture size of the lateral puncture, and the error can be reduced to within 0.1 mm. The modified chitosan is a natural biological material and has no cytotoxicity. After mixing with the non-ionic iodine contrast agent, no precipitate or sensitizing material is generated.

[0084] Accordingly, three groups of comparative tests are carried out.

[0085] I. Test group 1: Control test of whether to use a contrast agent

[0086] Experimental group 1A: Non-ionic iodine contrast agent (iohexol 300 mgI / mL) is used, and 5 min before examination, 1.5 mL / kg is injected through the elbow vein.

[0087] Experimental group 1B: No contrast agent is used (conventional CBCT examination process).

[0088] II. Test group 2: Control test of whether to use a modified chitosan auxiliary agent

[0089] Experimental group 2A: 0.5% modified chitosan solution (carboxymethyl chitosan) is used, and 10 min before examination, 5 mL is sprayed on the alveolar bone surface through oral spraying.

[0090] Experimental group 2B: No modified chitosan auxiliary agent is used (conventional CBCT examination process).

[0091] Three, test group 3: bromocresol green use or not control experiment

[0092] Experimental group 3A: use 0.1% bromocresol green solution, 5min before examination, smear on the adjacent surface of teeth and gingival groove, dose 2ml.

[0093] Experimental group 3B: no bromocresol green (routine CBCT examination process).

[0094] 1. Image quality core index comparison:

[0095] Evaluation index Experimental group 1A Experimental group 1B Experimental group 2A Experimental group 2B Experimental group 2A Experimental group 2B Soft tissue contrast 18.6±2.3 8.2±1.5 10.5±1.8 8.1±1.4 10.5±1.8 8.1±1.4 Bone density measurement error 2.1±0.5 2.3±0.6 1.8±0.4 2.3±0.6 1.8±0.4 2.2±0.5 Root canal display clarity 95.3 82.7 85.6 82.7 85.6 82.5 Artifact occurrence rate 12.5 8.3 6.7 8.3 6.7 8.5

[0096] It is known that:

[0097] Contrast agent group (1A): the contrast of soft tissue is significantly improved (P<0.05), especially in the differentiation degree of gingivitis area and normal tissue, but the incidence of artifacts is slightly higher (may be caused by uneven distribution of contrast agent in blood vessels). This is consistent with the mechanism of contrast agent enhanced blood vessel imaging in coronary CT, but the improvement of bone structure in oral CBCT is limited.

[0098] Modified chitosan group (2A): the error of bone density measurement is reduced by 18.2%, which may be due to the formation of coordination bond between the hydroxyl group of chitosan and bone mineral, which enhances the X-ray absorption difference of bone tissue, and does not increase the risk of artifacts.

[0099] Bromocresol green group (3A): there is no statistical difference between each index and the control group (P>0.05), which shows that it can only improve the visual identification as a colorant, but cannot improve the physical imaging quality of CBCT.

[0100] 2. Safety and operation efficiency index

[0101] Safety index Experimental group 1A Experimental group 1B Experimental group 2A Experimental group 2B Experimental group 2A Experimental group 2B Allergic reaction occurrence rate (%) 3.3 0 0 0 0 0 Mucous membrane irritation score (1-5 points) 2.1 1.2 1.3 1.3 1.2 1.5 Examination duration (min) 15.6 8.2 10.5 10.5 8.1 9.8

[0102] It is known that:

[0103] Contrast agent group (1A): 1 case of mild rash (consistent with the incidence of allergy of iodine contrast agent one ten thousandth to three ten thousandth), the examination time is increased by 90.2% (including injection and observation time), and the contraindicated population (such as patients with renal dysfunction) should be strictly controlled.

[0104] Modified chitosan group (2A): no adverse reaction, mucous membrane irritation score close to the control group, because the operation only adds a spraying step, the time is prolonged by 29.6%, the safety and practicability balance is good.

[0105] Bromocresol green group (3A): although there is no allergic reaction, the mucous membrane irritation score is slightly high (may be caused by acidic ingredients).

[0106] In summary:

[0107] Contrast agent: Only recommended for the diagnosis of oral soft tissue lesions (such as gingival tumor, mucosal cyst), which can increase the detection rate of lesions by 15%-20%, but the patient's allergic risk and renal function need to be strictly evaluated, and it is not necessary to use it in routine dental and implant surgery.

[0108] Modified chitosan adjuvant: It performs best in alveolar bone-related examinations (such as periodontal disease bone resorption measurement, implant site bone volume evaluation), which can improve the accuracy of bone density measurement by 18%, and has good biocompatibility, making it suitable as a regular adjuvant for further promotion of oral CBCT.

[0109] Bromocresol green: It has certain practical clinical value in CBCT examination and can provide intuitive observation effect through coloring effect within a short examination period.

[0110] Further explanation:

[0111] Modified chitosan can be replaced by a targeted adjuvant to allow the contrast agent to precisely adhere to the leak, avoiding the dispersion of the contrast agent from interfering with the perforation or leakage of the teeth or gums. This avoids the problem of blurred leak boundaries caused by the rapid dispersion of the contrast agent. Adding a targeted adjuvant allows the contrast agent to actively adhere to the leak tissue, clearly marking the location and range of the leak. When detecting dentin-related perforation, adding a dentin phosphoprotein antibody fragment can specifically bind to the exposed dentin phosphoprotein at the leak, causing the contrast agent to accumulate at the leak. When detecting gum leakage, adding a gum epithelial adhesion peptide, preferably an RGD peptide sequence, can bind to the integrin on the surface of the epithelial cells at the damaged gum, allowing the contrast agent to target and adhere.

[0112] Or after adding RGD peptide as an adjuvant, the contrast agent will adhere to the epithelial damage along the inner wall of the fistula, and through the three-dimensional reconstruction of CBCT, the running path of the fistula can be clearly displayed, avoiding missed diagnosis.

[0113] Modified chitosan can also be replaced by fluorescein sodium. Non-ionic iodine contrast agents represented by iohexol can only be developed by X-ray blocking, making it impossible to distinguish whether the accumulation area of the contrast agent is a leak. After adding fluorescein sodium with a concentration of 0.5%-1%, the contrast agent has dual characteristics of X-ray development and fluorescence development. Under X-ray, the approximate range of the leak can be located through iodine development, and under a specific wavelength light source, the contrast agent accumulated at the leak will emit specific fluorescence, which can be observed in real time through a fluorescence imaging instrument. Further explanation, because the fluorescence at the leak is strong and the fluorescence of normal gums is weak, fluorescence development can directly observe the leak position through an endoscope in the oral cavity by the difference in fluorescence intensity, without relying on the secondary scanning of the CBCT ball tube head 3, which helps to improve the detection efficiency, but the fluorescence marker needs to match the concentration of the non-ionic iodine contrast agent and avoid chemical reaction with the iodine contrast agent.

[0114] It is worth emphasizing that bromocresol green is yellow at pH 3.8-5.4 and blue at pH > 5.4, and after using bromocresol green with a concentration of 0.1%-0.3%, the penetration path can be tracked by color change. The pH value inside the tooth is about 7.0, and the contrast agent is initially blue. If there is a lateral leakage, the pH value of the inflammatory tissue metabolized lactic acid is about 5.0, which is acidic, and the contrast agent will gradually turn yellow when it penetrates into the interdental space. By observing the CBCT ball tube head 3, the penetration depth of the leakage can be determined. Moreover, after using bromocresol green, if the fistula has active leakage, the contrast agent will penetrate and change color with the exudate. Specifically, the contrast agent will change from blue to yellow within 5 minutes, and the doctor can determine the severity of the leakage by the speed of color change to decide whether immediate surgical intervention is needed.

[0115] It should be noted that the specific model specifications of the elevator 1, the CBCT ball tube head 3, the display 4 and the sensor 6 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method uses existing technology in the art, so it is not described in detail.

[0116] The function principle of the present application can be described as follows:

[0117] First, the sensor 6 is fixed on the embedded pipe 52 by the fixed pile 61, and the patient is in a seated position and holds the sensor 6 in the mouth, which includes the turning end head 63, the turning end seat 62 and the front end of the fixed pile 61.

[0118] Second, control the first universal adjuster 64 to operate, that is, control the traction sliding block 645 to move to drive the second rotating shaft 642 to move through the H-shaped pulley disc 646 to drive the strong suction cup 647 to move, the strong suction cup 647 extends into the ball groove to contact and fixedly connect the turning ball 648, control the first rotating shaft 641 to rotate, the first rotating shaft 641 drives the second rotating shaft 642 to deflect through the first gear 643 and the driven gear column 644, so that the strong suction cup 647 drives the turning ball 648 to deflect, and the turning end seat 62 deflects with the fixed pile 61 as the fulcrum, control the second universal adjuster 65 to operate, that is, control the third rotating shaft 652 to rotate, the third rotating shaft 652 drives the turning end head 63 to rotate through the second gear 653 and the driven gear 654, so that the turning end head 63 rotates with the turning end seat 62 as the fulcrum, and the wireless camera obtains the image information in the oral cavity, and the first hose 661 provides the contrast agent and the second hose 662 provides the auxiliary agent under the control of the CBCT ball tube head 3, so that the contrast agent and the auxiliary agent are mixed in the mixing barrel 667 to form a mixed agent.

[0119] Finally, the driver 663 drives the booster disc 664 to move and press the moving slider 665, the moving slider 665 slides along the inner wall of the steering tip 63 and presses the elastic telescopic rod 666, that is, controls the telescopic movement of the mixing cylinder 667 in the steering tip 63, uses the moving nozzle 668 to spray the mixed agent to the designated position in the oral cavity, and uses the two times of cooperation of the CBCT ball tube head 3 to observe the distribution of the mixed agent in the oral cavity, uses the modified chitosan to make the contrast agent form a weak gel suspension, the molecular chain is combined with the damaged tissue at the leak by hydrogen bond and electrostatic action, the local retention of the contrast agent at the leak is realized, and after the bromocresol green is used, if there is active leakage of the fistula, the contrast agent will penetrate and discolor with the auxiliary agent exudate, the severity of the leakage is judged by the speed of the color change, and it is determined whether the surgical intervention is needed.

[0120] The above merely describes the preferred specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered by the protection scope of the present application.

Claims

1. An oral examination CBCT imaging apparatus comprising an elevator (1) provided with a CBCT tube head (3) and a sensor (6), characterized in that, The elevator (1) is provided with: The chin support table (5) is fixedly installed at the middle position of the elevator (1), and the elevator (1) is provided with a display (4) electrically connected with the sensor (6); The sensor (6) enters the oral cavity through the chin support table (5), and the sensor (6) comprises: The fixed pile (61) is fixedly embedded in the chin support table (5); The steering end seat (62) is movably connected to the fixed pile (61), and the sensor (6) deflects up and down and left and right in the oral cavity through the steering end seat (62); The steering end head (63) is rotatably connected to the steering end seat (62), and the sensor (6) rotates 360° in the oral cavity through the steering end head (63), four wireless cameras are uniformly distributed on the steering end head (63), and a movable nozzle (668) for injecting contrast medium and auxiliary agent into the oral cavity is movably installed in the steering end head (63) to cooperate with the CBCT ball tube head (3).

2. The CBCT image apparatus for oral examination according to claim 1, wherein The chin support table (5) comprises: The extension frame (51) is fixedly installed at the middle position of the elevator (1), and the display (4) is fixedly installed on the extension frame (51); The embedded pipeline (52) is fixedly installed on the extension frame (51), and the embedded pipeline (52) is open at the top end, and the fixed pile (61) is horizontally embedded in the embedded pipeline (52).

3. The CBCT image apparatus for oral examination according to claim 2, wherein The first universal adjuster (64) is arranged between the fixed pile (61) and the steering end seat (62).

4. The CBCT image apparatus for oral examination according to claim 3, wherein The first universal adjuster (64) comprises: The ball groove is formed in the front end of the fixed pile (61); The steering ball (648) is movably sleeved in the ball groove, and the steering ball (648) is fixedly connected with the steering end seat (62).

5. The CBCT image apparatus for oral examination according to claim 4, wherein The second universal adjuster (65) is arranged between the steering end seat (62) and the steering end head (63).

6. The CBCT image apparatus for oral examination according to claim 5, wherein The second universal adjuster (65) comprises a limiting inner flange integrally connected to the opening position of the steering end seat (62), and the opening position of the steering end head (63) is integrally connected with a limiting outer flange movably sleeved on the limiting inner flange.

7. The CBCT image apparatus for oral examination according to claim 6, wherein The sensor (6) is provided with a reagent supply part (66) in the steering end seat (62) and the steering end head (63) for driving the movable nozzle (668) to cooperate with the CBCT ball tube head (3) to adjust the extension and rotation.

8. The CBCT image apparatus for oral examination according to claim 7, wherein The reagent supply part (66) comprises: The first hose (661) movably penetrates through the steering end seat (62) and extends into the steering end head (63), and the first hose (661) is used for supplying contrast medium for the movable nozzle (668); The second hose (662) movably penetrates through the steering end seat (62) and extends into the steering end head (63), and the second hose (662) is used for supplying auxiliary agent for the movable nozzle (668); A mixing barrel (667) is movably installed in the steering end head (63), one end of the mixing barrel (667) is connected with the first hose (661) and the second hose (662), and the other end of the mixing barrel (667) is connected with the mobile nozzle (668).

9. The CBCT image apparatus for oral examination according to claim 8, wherein The contrast agent is iohexol, and the auxiliary agent is modified chitosan and bromocresol green.

10. A method of using a CBCT imaging apparatus for oral examination according to claim 9, wherein, The use method comprises the following steps: Step S1, fixing the sensor (6) on the embedded pipeline (52) through the fixing pile (61), the patient assumes an end seat posture and holds the sensor (6) in the mouth, and the steering end head (63), the steering end seat (62) and the front end of the fixing pile (61) are all included; Step S2, controlling the first universal adjuster (64) to operate, so that the steering end seat (62) deflects with the fixing pile (61) as the fulcrum, controlling the second universal adjuster (65) to operate, so that the steering end head (63) rotates with the steering end seat (62) as the fulcrum, acquiring the image information in the oral cavity by using the wireless camera, and cooperating with the CBCT ball tube head (3) to control the first hose (661) to provide the contrast agent and the second hose (662) to provide the auxiliary agent, so that the contrast agent and the auxiliary agent are mixed in the mixing barrel (667) to form the mixed agent; Step S3, controlling the mixing barrel (667) to stretch and retract in the steering end head (63), and injecting the mixed agent into the specified position in the oral cavity by using the mobile nozzle (668), and observing the distribution of the mixed agent in the oral cavity by using the CBCT ball tube head (3) twice.

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