A disposable bitewing device for taking bitewing radiographs using parallel projection technology

Abstract

The present invention belongs to the field of medical devices, and relates to a disposable bite wing device for taking bite wing films with parallel projection technology, which is provided with a fixed ring and a bite wing belt; the fixed ring is provided with a ring body and a positioning rod, the ring body is hollow inside, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, and the two ends of the positioning rod are laterally connected and fixed with the ring side, and the positioning rod is provided with N positioning holes, N ≥ 1; the bite wing belt is provided with an extension strip and an adhesive sheet, the center point of the extension strip is provided with an indentation, and the two ends of the extension strip are respectively provided with adhesive sheets, and the adhesive sheet is provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface, and the adhesive portion is connected to the occlusal portion through a hinge mechanism, and the adhesive portion and the occlusal portion are plane or vertical with the hinge mechanism as a fulcrum. The device of the present invention has strong stability in position and angle with the tooth film, ensures the relative position and angle of the tube, the tooth to be photographed and the film, reduces the difficulty of shooting and the risk of cross infection, improves the accuracy and readability of the tooth film image information, and reduces the cost of disinfection or consumables.

Description

Technical Field

[0001] The invention belongs to the field of medical devices, and in particular relates to a disposable bite wing device for taking bite wing films. Background Art

[0002] Bitewing radiographs are a commonly used imaging technique in oral diagnosis. They can simultaneously display the local crown lesions of the upper and lower jaw dentition and the alveolar crest. Bitewing radiographs are of great value in the diagnosis of interproximal caries, caries depth, pulp cavity morphology, and alveolar crest resorption. They also have the advantages of better shooting comfort, more teeth included, and lower radiation dose.

[0003] At present, the commonly used shooting methods are the simple wing film method or the bitewing film holder method. The simple wing film method uses a paper tape to wrap around the dental film, and sticks the two ends into wings on the photosensitive surface of the dental film. The wings are adjusted to be perpendicular to the photosensitive surface and on the central axis of the dental film; or a rubber band is put on the central axis of the dental film, and a cardboard is hooked around the rubber band and folded into wings, and the wings are adjusted to be perpendicular to the photosensitive surface. This inspection method is low-cost and can theoretically ensure that the bitewing and the dental film are perpendicular. However, in actual operation, due to the presence of saliva in the mouth, the paper material is easily deformed and damaged. At the same time, due to the presence of the hard palate and the tongue, the dental film will tilt when placed in the mouth, and the angle between the bitewing and the dental film is easy to change. When the patient's upper and lower teeth bite, it is technically difficult to confirm the position of the dental film and the projection angle, and it is easy to distort and deform. Another bitewing film holder method uses a rigid film holder to clamp the dental film, and a bitewing is provided on the film holder that is perpendicular to the dental film and fixedly connected. This method can reduce angle deformation, but is less comfortable to use and will significantly increase consumables and disinfection costs.

[0004] In the projection method of taking bitewing radiographs, the angle of the tube needs to be adjusted appropriately according to the position. At the same time, tongue movement may also cause the dental film to tilt. These factors will increase the difficulty of shooting technology. Some film holders have added a tube ring structure based on the principle of parallel projection to reduce the difficulty of shooting technology, but the production cost also increases. In addition, the tube ring of most parallel projection holders is in contact with the tube but not fixed, which is easy to move when the tube is placed, affecting the image quality. Due to the lack of the above methods, the promotion and application of bitewing radiographs is poor. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a disposable bitewing device for taking bitewing radiographs using parallel projection technology, which effectively reduces the technical difficulty of taking bitewing radiographs, improves the accuracy and readability of dental film image information, reduces the risk of cross-infection, and reduces the cost of disinfection or consumables. It has stable shooting and high image quality, and is a feasible device that benefits both doctors and patients.

[0006] The present invention solves the above technical problems and is a disposable bite wing device for taking bite wing films by parallel projection technology, characterized in that: a fixed ring and a bite wing belt are provided; the fixed ring is provided with a ring body and a positioning rod, the ring body is hollow, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, and both ends of the positioning rod are laterally connected and fixed to the ring side, and the positioning rod is provided with N positioning holes, N≥1; the bite wing belt is provided with an extension strip and an adhesive sheet, a pressure mark is provided at the center point of the extension strip, and adhesive sheets are provided at both ends of the extension strip, respectively, and the adhesive sheet is provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface, the adhesive portion is connected to the occlusal portion through a hinge mechanism, and the adhesive portion and the occlusal portion are in a plane or perpendicular to each other with the hinge mechanism as a fulcrum; when in use, the extension strip is folded inward at the pressure mark, the lower surfaces of the two adhesive sheets overlap each other, and the two adhesive portions are folded outward into a plane with the hinge mechanism as a fulcrum, and are perpendicular to the occlusal portion, so as to bond the film photosensitive sheet; the pressure mark end of the extension strip is inserted into the positioning hole and connected to the positioning hole as a whole, which plays a positioning role.

[0007] The ring body is a dental X-ray tube fixing ring. X-ray is an electromagnetic wave with a very short wavelength, a photon, and the wavelength of X-ray used in diagnosis is 0.08-0.31 angstroms (1 angstrom = 0.1 nanometers = 10-10 meters), which is used as one of the auxiliary examination methods in medicine.

[0008] The X-ray tube fixing ring is in a circular shape, with an inner diameter of 68-84 mm, a thickness of ≥3 mm, and a width of 10-20 mm; in the optimized solution, the inner diameter of the ring is 68 mm, the thickness of the ring is 3 mm, and the width of the ring is 15 mm.

[0009] The inner surface of the circular ring is provided with a soft lining, the size of which matches the outer diameter of the dental X-ray tube, so that it is fixed on the outer edge of the tube. The size of the inner diameter of the fixing ring is important, and the appropriate size makes the shooting angle consistent, thereby improving the accuracy.

[0010] The soft lining is made of loose and elastic plastic, sponge or other similar materials, and its function is to increase the stability of the fit between the tube ring and the X-ray tube.

[0011] The geometric center of the positioning rod coincides with the center of the fixed ring. The geometric center is located on the center line of the short side of the positioning rod. When in use, the disposable bite wing paper tape extension strip is embedded in the positioning hole to relatively fix the position angle between the two. The positioning rod and the ring body can be made as one piece, completely fixed and cannot move; or they can be bolted and installed and adjusted.

[0012] The length of the positioning rod is consistent with the inner diameter of the ring body, with a length of 68-84mm, a width of 10-20mm and a thickness of ≥3mm; in the optimized solution, the length of the positioning rod is 68mm, the width is 10mm and the thickness is 3mm.

[0013] Said N=3, that is, the positioning rod is provided with 3 positioning holes, one of which is located at the geometric center of the positioning rod, and the other two positioning holes are symmetrically distributed on both sides, and the distance from the two short sides of the positioning rod is greater than 15mm; in the optimization scheme, the two positioning holes are 20mm away from the shorter side of the two short sides of the positioning rod.

[0014] The positioning hole is rectangular, with a length of 3-8 mm and a width of 3-8 mm. In the optimized solution, the positioning hole is 5 mm long and 5 mm wide.

[0015] The bite wing tape is a disposable bite wing paper tape.

[0016] The hinge mechanism is a folding line.

[0017] The tube fixing ring of the present invention is a fixing device, which does not contact the human body and can be used repeatedly. The disposable bite wing paper tape enters the oral cavity and is a disposable device, single use, disposable consumables, and one person changes it. The device of the present invention not only meets the requirements of hospital infection control, but also saves consumables and disinfection costs.

[0018] The extension strip is connected to the adhesive sheet by bonding. The extension strip is pasted on the lower surface of the adhesive sheet, the lower surface of the adhesive sheet is adhesive, and the extension strip runs through the entire length of the adhesive sheet.

[0019] The extension strip is a long rectangular parallelepiped with a size of 100-200mm in length, 3-10mm in width, and 0.3-2mm in height; in the optimized solution, it is 120mm in length, 5mm in width, and 0.5mm in height. When in use, the extension strip is folded along the impression, and the part exposed outside the mouth is inserted into the positioning hole to play a positioning role.

[0020] The extension strip is made of highly plastic plastic. The highly plastic plastic material (such as PE) has a low cost of use, and after being folded as required, it acts as a bracket in the adhesive sheet to stabilize and reinforce the vertical relationship between the adhesive part (tooth piece) and the occlusal part; and the narrow structure and good elasticity of the plastic can adapt to the specificity of various oral structures and reduce discomfort during use.

[0021] The adhesive sheet is an adhesive sticker with a certain strength, the upper surface of the adhesive sticker is non-sticky, and the lower surface is sticky. The adhesive lower surface of the sticker is bonded to the extension strip, and the non-stick upper surface of the sticker has good hydrophobicity and is not easy to deform when in contact with saliva for a short time. When in use, the adhesive part and the occlusal part are folded at an angle of 90° along the folding line, the occlusal parts on both sides are bonded to each other, and the adhesive parts on both sides are combined into a plane and bonded to the photosensitive surface of the tooth piece.

[0022] The adhesive sheet is rectangular, 20-35 mm long and 15-30 mm wide; in the optimized solution, it is 30 mm long and 20 mm wide.

[0023] The sticking part is located at the end of the adhesive sheet away from the extension strip, and the ratio of the sticking part to the bite part is 1:2. The bite part is located at the side of the adhesive sheet close to the extension strip, and the size varies according to the sticking part.

[0024] The adhesive portion is in the shape of a scissors, 15-30 mm long and ≤10 mm wide; in the optimized solution, the adhesive portion is 20 mm long and 10 mm wide; the bite portion is 20 mm long and 20 mm wide.

[0025] The device of the present invention has a delicate and flexible structure, small deformation, and complies with the principle of parallel projection technology. Plastic and paper materials are selected as materials, and X-rays can penetrate completely without generating artifacts or affecting the quality of photos. The bite wing paper tape that contacts the patient's mouth is disposable, one person at a time, hygienic and safe, and meets the requirements of hospital infection control. When in use, the tube fixing ring is mounted on the front end of the tube of the dental film machine from the rear end face, and at the same time, the extension strip is folded inward according to the pressure mark of the midpoint, and the adhesive strips on both sides are folded outward along the folding line. The occlusal parts of the adhesive strips on both sides are pasted to each other, and the adhesive parts of the adhesive strips on both sides are connected and pasted to the center of the long axis of the photosensitive surface of the dental film. The patient is asked to bite the occlusal part tightly, and the extension strip extending out of the mouth is inserted into the positioning hole to take dental films.

[0026] The present invention has strong stability in the position angle of the disposable bitewing paper tape and the dental film when taking bitewing films, and uses parallel projection technology to ensure the relative position and angle of the tube, the teeth being photographed and the film. It reduces the difficulty of shooting, improves the accuracy and readability of dental film image information; reduces the risk of cross infection, and reduces the cost of disinfection or consumables. Controlling costs also improves the structural stability of the disposable bitewing device. On the other hand, the tube ring is fixed, and the parallel projection technology is applied to make shooting more stable, the image quality higher, and it does not need to be replaced frequently, reducing the cost of consumables. It is a feasible way to benefit both doctors and patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0028] Figure 1 A front view of the ball tube fixing ring of the present invention

[0029] Figure 2 A side view of the ball tube fixing ring in the present invention

[0030] Figure 3 A top view of the ball tube fixing ring in the present invention

[0031] Figure 4 The three-dimensional model diagram of the ball tube fixing ring in the present invention

[0032] Figure 5 The front view of the disposable bite wing paper tape of the present invention

[0033] Figure 6 The back view of the disposable bite wing paper tape of the present invention

[0034] Figure 7 A side view of the disposable bite wing paper tape of the present invention

[0035] Figure 8 A three-dimensional diagram of the disposable bite wing paper tape of the present invention

[0036] Fig. 9 A front view of the disposable bite wing paper tape of the present invention in a folded and used state

[0037] Fig.10 A side view of the disposable bite wing paper tape of the present invention in a folded state.

[0038] Fig.11 A top view of the disposable bite wing paper tape of the present invention in a folded and applied state

[0039] Fig.12 A three-dimensional diagram of the disposable bite wing paper tape folding and using state in the present invention

[0040] Fig.13 Take a three-dimensional model of the posterior bitewing film for the present invention

[0041] Fig.14 Take a 3D model of the anterior teeth bite wing for the present invention

[0042] Among them, the specific symbols in the figure are:

[0043] 1. Ball tube fixing ring, 2. Positioning rod, 3. Positioning hole, 4. Extension strip, 5. Extension strip pressure mark, 6. Adhesive sheet (6-1 adhesive sheet has adhesive surface; 6-2 adhesive sheet has no adhesive surface), 7. Occlusal part, 8. Adhesive part, 9. Folding line, 10. Ball tube, 11. Posterior teeth, 12. Anterior teeth, 13. Tooth sheet DETAILED DESCRIPTION

[0044] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings to make its technical content clearer and easier to understand. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Example 1

[0046] A disposable bitewing device for taking bitewing films with parallel projection technology is provided with a fixing ring and a bitewing band; the fixing ring is provided with a ring body and a positioning rod, the ring body is a dental X-ray tube annular ring, the inside of the ring is hollow, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, the two ends of the positioning rod are laterally connected and fixed to the ring side, and the positioning rod is provided with N positioning holes, N≥ 1. The bite wing belt is provided with an extension strip and an adhesive sheet. The center point of the extension strip is provided with an indentation. Adhesive sheets are provided at both ends of the extension strip respectively. The adhesive sheets are provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface. The adhesive portion is connected to the occlusal portion through a hinge mechanism. The adhesive portion and the occlusal portion are in a plane or perpendicular to each other with the hinge mechanism as a fulcrum. When in use, the extension strip is folded inward at the indentation, the lower surfaces of the two adhesive sheets overlap each other, and the two adhesive portions are folded outward into a plane with the hinge mechanism as a fulcrum, and are perpendicular to the occlusal portion, so as to bond the film photosensitive sheet. The indentation end of the extension strip is inserted into the positioning hole and connected to the positioning hole as a whole, which plays a positioning role and relatively fixes the position angle between the two.

[0047] The inner diameter of the ring is 68mm, the thickness of the ring is ≥3mm, and the width of the ring is 10mm. A soft lining is provided on the inner surface of the ring, the size of which matches the outer diameter of the dental X-ray tube, so that it is fixed on the outer edge of the tube. The soft lining is a loose and elastic sponge, which serves to increase the stability of the tube ring and the X-ray tube.

[0048] The geometric center of the positioning rod coincides with the center of the fixed ring. The geometric center is located on the center line of the short side of the positioning rod. When in use, the disposable bite wing paper tape extension strip is embedded in the positioning hole to relatively fix the position angle between the two. The positioning rod and the ring body are made as one piece and are completely fixed and cannot move. The length of the positioning rod is consistent with the inner diameter of the ring body, with a length of 68mm, a width of 10mm and a thickness of ≥3mm.

[0049] The positioning rod is provided with 3 positioning holes, one of which is located at the geometric center of the positioning rod, and the other two positioning holes are symmetrically distributed on both sides, with a distance of more than 15mm from the two short sides of the positioning rod. The positioning hole is rectangular, with a length of 8mm and a width of 3mm.

[0050] The location of the positioning holes is related to the oral anatomical structure. The center positioning hole is used to take bitewing films of the anterior teeth, the right positioning hole is used to take bitewing films of the right posterior teeth, and the left positioning hole is used to take bitewing films of the left posterior teeth. Fig.13 and Fig.14 .

[0051] The bite wing strip is a disposable bite wing paper strip, and the hinge mechanism is a folding line. The extension strip is connected to the adhesive sheet by bonding, the extension strip is attached to the lower surface of the adhesive sheet, the lower surface of the adhesive sheet is adhesive, and the extension strip runs through the entire length of the adhesive sheet.

[0052] The extension strip is a long rectangular parallelepiped with a size of 100 mm in length, 3 mm in width and 0.3 mm in height. When in use, the extension strip is folded along the pressure mark, and the part exposed outside the mouth is inserted into the positioning hole to play a positioning role.

[0053] The extension strip is made of highly plastic plastic, such as PE, with low cost of use. After folding as required, it acts as a bracket in the adhesive sheet, stabilizing and reinforcing the vertical relationship between the adhesive part (tooth piece) and the occlusal part. The narrow structure and good elasticity of the plastic can adapt to the specificity of various oral structures and reduce discomfort during use.

[0054] The adhesive sheet is an adhesive sticker with a certain strength. The upper surface of the adhesive sticker is non-sticky, and the lower surface is sticky. The lower surface of the sticker with stickiness is bonded to the extension strip, and the upper surface of the sticker without stickiness has good hydrophobicity and is not easy to deform when in contact with saliva for a short time. When using, fold the adhesive part and the occlusal part along the folding line to a 90° angle, and the occlusal parts on both sides are bonded to each other. The adhesive parts on both sides are combined into a plane and pasted on the photosensitive surface of the tooth piece. The adhesive sheet is rectangular, 20mm long and 15mm wide.

[0055] The adhesive part is located at the end of the adhesive sheet away from the extension strip, and the ratio of the adhesive part to the bite part is 1:2. The bite part is located on the side of the adhesive sheet close to the extension strip, and the size varies according to the adhesive part. The adhesive part is a distance shape, 15mm long and ≤10mm wide.

[0056] Example 2

[0057] A disposable bitewing device for taking bitewing films with parallel projection technology is provided with a fixing ring and a bitewing band; the fixing ring is provided with a ring body and a positioning rod, the ring body is a dental X-ray tube annular ring, the inside of the ring is hollow, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, the two ends of the positioning rod are laterally connected and fixed to the ring side, and the positioning rod is provided with N positioning holes, N≥ 1. The bite wing belt is provided with an extension strip and an adhesive sheet. The center point of the extension strip is provided with an indentation. Adhesive sheets are provided at both ends of the extension strip respectively. The adhesive sheets are provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface. The adhesive portion is connected to the occlusal portion through a hinge mechanism. The adhesive portion and the occlusal portion are in a plane or perpendicular to each other with the hinge mechanism as a fulcrum. When in use, the extension strip is folded inward at the indentation, the lower surfaces of the two adhesive sheets overlap each other, and the two adhesive portions are folded outward into a plane with the hinge mechanism as a fulcrum, and are perpendicular to the occlusal portion, so as to bond the film photosensitive sheet. The indentation end of the extension strip is inserted into the positioning hole and connected to the positioning hole as a whole, which plays a positioning role and relatively fixes the position angle between the two.

[0058] The inner diameter of the ring is 84mm, the thickness of the ring is ≥3mm, and the width of the ring is 20mm. A soft lining is provided on the inner surface of the ring, the size of which matches the outer diameter of the dental X-ray tube so that it can be fixed on the outer edge of the tube. The geometric center of the positioning rod coincides with the center of the fixed ring, and the positioning rod and the ring body are bolted and movable. The length of the positioning rod is consistent with the inner diameter of the ring body, with a length of 84mm, a width of 20mm and a thickness of ≥3mm. The positioning rod is provided with 4 positioning holes, which are rectangular, with a length of 3mm and a width of 8mm. The soft lining is a loose and elastic plastic.

[0059] The bite wing strip is a disposable bite wing paper strip, and the hinge mechanism is a folding line. The extension strip is connected to the adhesive sheet by bonding, the extension strip is attached to the lower surface of the adhesive sheet, the lower surface of the adhesive sheet is adhesive, and the extension strip runs through the entire length of the adhesive sheet.

[0060] The extension strip is a long rectangular parallelepiped, with dimensions of 200mm in length, 10mm in width, and 2mm in height. The extension strip is a plastic with strong plasticity, such as PE. The adhesive sheet is an adhesive sticker with a certain strength. The upper surface of the adhesive sticker is non-sticky, and the lower surface is sticky. The lower surface of the sticker is bonded to the extension strip, and the upper surface of the sticker is non-sticky. It is not easy to deform when it comes into contact with saliva for a short time. When in use, fold the adhesive part and the occlusal part at a 90° angle along the folding line, and the occlusal parts on both sides are bonded to each other. The adhesive parts on both sides are combined into a plane and pasted on the photosensitive surface of the tooth film. The adhesive sheet is rectangular, 35mm long and 30mm wide.

[0061] The adhesive part is located at the end of the adhesive sheet away from the extension strip, and the ratio of the adhesive part to the bite part is 1:2. The bite part is located on the side of the adhesive sheet close to the extension strip, and the size varies according to the adhesive part. The adhesive part is a distance-shaped part, 30mm long and ≤10mm wide.

[0062] Example 3

[0063] A disposable bitewing device for taking bitewing films using parallel projection technology is provided with a fixing ring and a bitewing belt; the fixing ring is provided with a ring body and a positioning rod, the ring body is a dental X-ray tube annular shape, the inside of the ring is hollow, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, the two ends of the positioning rod are laterally connected and fixed to the ring side, and the positioning rod is provided with N positioning holes, N ≥ 1; the bitewing belt is provided with an extension strip and an adhesive sheet, a pressure mark is provided at the center point of the extension strip, and adhesive sheets are provided at both ends of the extension strip, respectively, the adhesive sheet is provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface, the adhesive portion is connected to the occlusal portion through a hinge mechanism, and the adhesive portion and the occlusal portion are in a plane or perpendicular to each other with the hinge mechanism as a fulcrum; when in use, the extension strip is folded inwardly at the pressure mark, the lower surfaces of the two adhesive sheets overlap each other, and the two adhesive portions are folded outwardly into a plane with the hinge mechanism as a fulcrum, and are perpendicular to the occlusal portion, for bonding film photosensitive sheets; the pressure mark end of the extension strip is inserted into the positioning hole and connected to the positioning hole as a whole, which plays a positioning role. The disposable bite wing paper tape extension strip is embedded in the positioning hole to relatively fix the position angle between the two.

[0064] The inner diameter of the ring is 68mm, the thickness of the ring is 3mm, and the width of the ring is 15mm. A soft lining is provided on the inner surface of the ring, the size of which matches the outer diameter of the dental X-ray tube, so that it is fixed on the outer edge of the tube. The geometric center of the positioning rod coincides with the center of the fixed ring. The positioning rod and the ring body are made as one body, completely fixed and cannot move. The length of the positioning rod is consistent with the inner diameter of the ring body. The length of the positioning rod is 68mm, the width is 10mm and the thickness is 3mm. The soft lining is a loose and elastic plastic.

[0065] The positioning rod is provided with 3 positioning holes, one of which is located at the geometric center of the positioning rod, and the other two positioning holes are symmetrically distributed on both sides, 20mm away from the shorter side of the two short sides of the positioning rod. The positioning hole is rectangular, with a length of 5mm and a width of 5mm.

[0066] The bite wing strip is a disposable bite wing paper strip, and the hinge mechanism is a folding line. The extension strip is connected to the adhesive sheet by bonding, the extension strip is attached to the lower surface of the adhesive sheet, the lower surface of the adhesive sheet is adhesive, and the extension strip runs through the entire length of the adhesive sheet.

[0067] The extension strip is a long rectangular parallelepiped with a size of 120mm long, 5mm wide and 0.5mm high. When in use, fold the extension strip along the impression and insert the part exposed outside the mouth into the positioning hole to play a positioning role. The extension strip is made of highly plastic plastic, such as PE

[0068] The adhesive sheet is an adhesive sticker with a certain strength. The upper surface of the adhesive sticker is non-sticky, and the lower surface is sticky. The lower surface of the sticker with stickiness is bonded to the extension strip, and the upper surface of the sticker without stickiness has good hydrophobicity and is not easy to deform when in contact with saliva for a short time. When using, fold the adhesive part and the occlusal part along the folding line at an angle of 90°, and the occlusal parts on both sides are bonded to each other. The adhesive parts on both sides are combined into a plane and pasted on the photosensitive surface of the tooth piece. The adhesive sheet is rectangular, 30mm long and 20mm wide.

[0069] The adhesive part is located at the end of the adhesive sheet away from the extension strip, and the ratio of the adhesive part to the bite part is 1:2. The bite part is located on the side of the adhesive sheet close to the extension strip, and the size varies according to the adhesive part. The adhesive part is a distance shape, with an adhesive length of 20mm and a width of 10mm; the bite length is 20mm and a width of 20mm.

[0070] Test 1

[0071] As described in Example 1, the posterior teeth bitewing radiographs of patients with interproximal caries were taken using the device of the present invention as the experimental group.

[0072] After the filming is completed, a simple paper tape method is used to take a bitewing film of the posterior teeth. A rubber band is put on the central axis of the tooth film, and a cardboard is hooked around the rubber band and folded into a wing. The wing is adjusted to be perpendicular to the photosensitive surface. The tooth film is placed in the patient's mouth, and the patient is asked to bite the paper and take the film as the control group.

[0073] The two sets of images were compared to observe the elongation or compression of the posterior tooth crowns, the overlap of the posterior tooth interproximal surfaces, and the appearance of interproximal caries. The details are shown in Table 1 below:

[0074] Table 1. Comparison of bitewing images taken by the device of the present invention and the simple paper tape method

[0075]

[0076] As can be seen from the above table, the results show that the bitewing images obtained using the device of the present invention have no deformation or distortion of the posterior teeth, no overlap of adjacent teeth, and the location and range of interproximal caries are easy to observe; the bitewing images obtained by the simple paper tape method appear partially elongated or compressed, and the adjacent surfaces of some images overlap, affecting the diagnosis of interproximal caries.

[0077] The method for using the device of the present invention is as follows:

[0078] (1) The operator puts the tube fixing ring on the front end of the tube of the dental machine, and the positioning rod overlaps with the horizontal line of the tube;

[0079] (2) Fold the extension strip along the indentation so that the adhesive surfaces of the adhesive sheets on both sides face each other; then fold the adhesive sheets on both sides outward by 90° along the folding line, and adhere the two side bite parts to each other, so that the two side adhesive parts are combined into a large adhesive part;

[0080] (3) The adhesive part is attached to the photosensitive surface of the dental film. (When photographing the back teeth) ensure that the central connecting line of the adhesive part coincides with the center line of the short side of the dental film, and the outer edge line of one side of the adhesive part coincides with the short side of the dental film; (When photographing the front teeth) ensure that the central connecting line of the adhesive part coincides with the center line of the long side of the dental film, and the center of the adhesive part coincides with the geometric center of the dental film;

[0081] (4) The operator places the dental film and the device at the target tooth position in the patient's mouth, ensuring that the center of the dental film overlaps with the midline of the target tooth, the disposable bite wing paper tape is placed forward, and the extension strip is positioned away from the corners of the mouth, and the patient is instructed to align the upper and lower teeth and bite the occlusal part tightly;

[0082] (5) Adjust the angle of the tube position. (When photographing the right posterior teeth) insert the end of the extension strip outside the patient's mouth exactly into the right positioning hole at the front end of the tube; (When photographing the left posterior teeth) insert the end of the extension strip outside the patient's mouth exactly into the left positioning hole at the front end of the tube; (When photographing the front teeth) insert the end of the extension strip outside the patient's mouth exactly into the center positioning hole at the front end of the tube;

[0083] (6) Tube exposure to image the teeth on a dental film;

[0084] (7) After the filming, the patient is asked to open his mouth, remove the dental film and the device, scan the dental film and read the image, and discard the dental film protective cover and disposable bite wing device into the medical waste bin.

[0085] Specifically, when taking bitewing films of posterior teeth, the operator puts the tube fixing ring on the front end of the tube of the dental film machine, and the positioning rod overlaps with the horizontal line of the tube. Take out the disposable bitewing paper tape from the sterilized sealing bag, fold the extension strip along the pressure mark, so that the sticky surfaces of the two sticky sheets face each other; then fold the two sticky sheets 90° outward along the folding line, and stick the two occlusal parts to each other. The two sticky parts are combined into a large sticky part and stuck to the photosensitive surface of the dental film, ensuring that the central line of the sticky part coincides with the center line of the short side of the dental film, and at the same time, the outer edge line of one side of the sticky part coincides with the short side of the dental film. The operator places the dental film and the device on the target palate side of the patient's mouth, places the disposable bitewing paper tape forward, and avoids the corner of the mouth. The patient is asked to align the upper and lower teeth and bite the occlusal part tightly; adjust the angle of the tube position, and insert the end of the extension strip exposed outside the patient's mouth into the positioning hole at the front end of the tube. After the tube exposure and shooting is completed, the patient is asked to open his mouth, and the operator takes out the dental film and the device, scans and reads the dental film information, and discards the disposable bitewing device.

[0086] When shooting the front teeth bitewing film, the operator puts the tube fixing ring on the front end of the tube of the dental film machine, and the positioning rod overlaps with the horizontal line of the tube. Take out the disposable bitewing paper tape from the sterilized sealing bag, fold the extension strip along the pressure mark, so that the sticky surfaces of the two sticky sheets face each other; then fold the two sticky sheets 90° outward along the folding line, and stick the two occlusal parts to each other. The two sticky parts are combined into a large sticky part and stuck to the photosensitive surface of the dental film, ensuring that the central connecting line of the sticky part coincides with the center line of the long side of the dental film, and the center of the sticky part coincides with the geometric center of the dental film. The operator places the dental film and the device on the target tooth palate side in the patient's mouth, and asks the patient to align the upper and lower teeth and bite the occlusal part tightly; adjust the tube position angle, and insert the end of the extension strip exposed outside the patient's mouth into the center positioning hole of the tube. After the tube exposure and shooting is completed, ask the patient to open his mouth, and the operator takes out the dental film and the device, scans and reads the dental film information, and discards the disposable bitewing device.

[0087] One section of the device in the present invention is a tube ring device that does not contact the human body and is fixed to the outer edge of the tube. It does not need to be replaced frequently, which reduces the cost of consumables. At the same time, the connection method of fixing the tube and the tube ring makes parallel projection shooting more stable and the image quality is higher; the other section is a disposable bite wing paper tape that contacts the oral cavity. It uses a combination of paper and highly plastic plastic materials. On the basis of reducing the cost of use, it can also play a stabilizing and reinforcing role. Its special structural design and good plasticity also make the device adaptable to various oral structures and reduce discomfort during use. The device has achieved very good results. It is a key research and development project of Sichuan Province (2020YFS0045) funded by the "Sichuan Science and Technology Plan", an artificial intelligence-assisted diagnosis research and remote cloud imaging application demonstration based on oral and maxillofacial imaging big data.

[0088] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A disposable bitewing device for taking bitewing radiographs using parallel projection technology, characterized in that: A fixing ring and a bite wing belt are provided; the fixing ring is provided with a ring body and a positioning rod, the ring body is hollow, and is provided with a ring side, a front end and a rear end, the positioning rod is provided at the front end of the ring body, and both ends of the positioning rod are laterally connected and fixed to the ring side, and the positioning rod is provided with N positioning holes, N ≥ 1; the bite wing belt is provided with an extension strip and an adhesive sheet, a pressing mark is provided at the center point of the extension strip, and adhesive sheets are provided at both ends of the extension strip, respectively, and the adhesive sheet is provided with an adhesive portion, a hinge mechanism, an occlusal portion, an upper surface and a lower surface, the adhesive portion is connected to the occlusal portion through a hinge mechanism, and the adhesive portion and the occlusal portion are in a plane or perpendicular to each other with the hinge mechanism as a fulcrum; when in use, the extension strip is folded inward at the pressing mark, the lower surfaces of the two adhesive sheets overlap each other, and the two adhesive portions are folded outward into a plane with the hinge mechanism as a fulcrum, and are perpendicular to the occlusal portion, so as to bond the film photosensitive sheet; the pressing mark end of the extension strip is inserted into the positioning hole and connected to the positioning hole as a whole, which plays a positioning role; The ring body is a dental X-ray tube fixing ring; The X-ray tube fixing ring is in the shape of a ring, with an inner diameter of 68-84 mm, a thickness of ≥3 mm, and a width of 10-20 mm; a soft lining is provided on the inner surface of the ring, the size of which matches the outer diameter of the dental X-ray tube so that it is fixed on the outer edge of the tube; The hinge mechanism is a folding line.

2. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 1, characterized in that: The geometric center of the positioning rod coincides with the center of the fixed ring; the length of the positioning rod is consistent with the inner diameter of the ring body, with a length of 68-84mm, a width of 10-20mm and a thickness of ≥3mm.

3. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 1, characterized in that: Said N=3, that is, the positioning rod is provided with 3 positioning holes, wherein one positioning hole is located at the geometric center of the positioning rod, and the other two positioning holes are symmetrically distributed on both sides, and the distance from the two short sides of the positioning rod is greater than 15mm; the positioning holes are rectangular, and the rectangle is 3-8mm long and 3-8mm wide.

4. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 1, characterized in that: The bite wing tape is a disposable bite wing paper tape.

5. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 1, characterized in that: The extension strip is connected to the sticky sheet by bonding. The extension strip is pasted on the lower surface of the sticky sheet. The lower surface of the sticky sheet is sticky. The extension strip runs through the entire length of the sticky sheet. The long axis of the extension strip coincides with the center line of the short side of the sticky sheet. The extension strip is a long rectangular parallelepiped with dimensions of 100-200mm in length, 3-10mm in width, and 0.3-2mm in height.

6. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 5, characterized in that: The extension strip is made of plastic with strong plasticity; the adhesive sheet is an adhesive sticker with certain strength, the upper surface of the adhesive sticker is non-adhesive, and the lower surface is adhesive; the adhesive sheet is rectangular, 20-35mm long, and 15-30mm wide.

7. A disposable bitewing device for taking bitewing radiographs using parallel projection technology according to claim 1, characterized in that: The adhesive portion is located at the end of the adhesive sheet away from the extension strip, and the bite portion is located at the side of the adhesive sheet close to the extension strip. The size varies according to the adhesive portion; the adhesive portion is rectangular, 15-30mm long and ≤10mm wide.

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