Eraser chain length measuring ruler for orthodontics department

Abstract

The utility model relates to an orthodontic department rubber chain length measuring scale, which comprises a main body, a short distance measuring part and a long distance measuring part, the short distance measuring part and the long distance measuring part are connected to two sides of the main body, the short distance measuring part is adaptive to measurement of a short distance rubber chain, and the long distance measuring part is adaptive to measurement of a long distance rubber chain; convex points arranged according to the number of tooth positions are arranged on the surfaces of the short-distance measuring part and the long-distance measuring part, and the heights of the convex points are consistent; a numerical value mark corresponding to the tooth number is marked beside each convex point, and the numerical value marks of the short-distance measuring part and the long-distance measuring part are distinguished through colors or icons; a cutting guide groove is formed beside the protruding point, and the width of the cutting guide groove is matched with the tip end of the scissors. The utility model provides an orthodontic department rubber chain length measuring scale, by means of the measuring scale, medical staff can quickly acquire the required number of long-distance rubber chains or short-distance rubber chains, the operation process is simple, convenient and quick, the reliability is high, good use experience is brought to users, and the actual requirements in the orthodontic treatment process are effectively met.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a measuring ruler for measuring the length of an orthodontic rubber chain. Background Technology

[0002] In orthodontic clinical treatment, elastic chains are a key orthodontic device for controlling the three-dimensional movement of teeth, and their length accuracy directly determines the mechanical properties of the orthodontic force system. Currently, the precise selection and measurement of elastic chains of different specifications (long / short lengths) present a dual technical challenge in clinical practice: on the one hand, medical staff need to visually identify the type of elastic chain; on the other hand, they still rely on manual link-by-link counting for length measurement. This dual manual interpretation mode has systemic defects—visual fatigue leads to an increased rate of type misjudgment, while continuous counting operations make a single measurement take 3-5 minutes, and the error rate increases exponentially with the number of links. More seriously, cumulative errors may lead to a decrease in orthodontic force, or even irreversible clinical consequences such as deviations in tooth movement trajectories. Therefore, developing measurement technology that integrates automatic type identification and rapid link measurement has become a core technological breakthrough direction for achieving precise orthodontic treatment. Utility Model Content

[0003] In view of this, the present invention provides an orthodontic elastic chain length measuring ruler. With this ruler, medical staff can quickly obtain the required number of long or short elastic chains, making the operation simple and quick. Furthermore, this measuring ruler possesses high reliability, exhibiting excellent performance in both measurement accuracy and product stability, providing users with a good user experience and effectively meeting the practical needs of orthodontic treatment.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An orthodontic elastic chain length measuring ruler includes a main body, a short-distance measuring section and a long-distance measuring section connected to both sides of the main body. The short-distance measuring section is adapted for measuring short-distance elastic chains, and the long-distance measuring section is adapted for measuring long-distance elastic chains. Both the short-distance and long-distance measuring sections have raised points arranged according to the number of teeth, and the raised points have the same height. Each raised point is marked with a numerical mark corresponding to the number of teeth. The numerical marks on the short-distance and long-distance measuring sections are distinguished by color or icon. A cutting guide groove is provided next to each raised point, and the width of the cutting guide groove is adapted to the tip of scissors.

[0006] This measuring ruler allows medical staff to quickly obtain the required number of long or short elastic bands, making the operation simple and fast. Furthermore, this measuring ruler boasts high reliability, performing excellently in both measurement accuracy and product stability, providing users with a superior experience and effectively meeting the practical needs of orthodontic treatment. The tool can identify and differentiate between long and short elastic bands; long elastic bands can only be fitted onto the protruding point of the long-distance measuring section, while short elastic bands can only be fitted onto the protruding point of the short-distance measuring section, thus achieving identification and differentiation. The dual-segment measurement structure provides full coverage support for different types of elastic bands. The partitioned design of the short and long-distance measuring sections precisely adapts to the measurement needs of different types of elastic bands in orthodontic treatment, allowing for measurements of both specifications without switching tools during clinical operation. The color / icon differentiation system establishes an intuitive visual coding system, enabling medical staff to quickly identify measurement areas even under high-pressure environments, significantly reducing the operational error rate. The mechanical fit between the cutting guide groove and the scissor tip provides physical positioning constraints for the cutting action, enabling rapid cutting of rubber chains. This integrated solution combines the three key steps of rapid measurement, positioning, and cutting into a single tool, significantly improving efficiency compared to traditional step-by-step operations.

[0007] Preferably, the inner wall of the cutting guide groove is coated with a luminescent material layer for positioning indication in low-light environments.

[0008] The introduction of a photoluminescent material layer significantly improves the device's environmental adaptability. In dental treatment settings, the surgical area is often semi-enclosed due to patient positioning restrictions or special treatment needs, resulting in insufficient lighting. The photoluminescent material layer uses a specially formulated long-lasting light-gathering material that forms a continuously bright guiding light band after absorbing ambient light. This characteristic allows medical staff to accurately locate the groove position even under complex lighting conditions, making it particularly suitable for emergency nighttime surgeries or special cases requiring dimming of the lights. The composite process of the photoluminescent material and medical-grade resin ensures that the material layer has excellent wear resistance and biocompatibility, maintaining high luminous efficiency even after rigorous disinfection testing. Compared to traditional fluorescent coatings, this solution requires no power supply and poses no radiation risk, meeting medical device safety standards. Clinical trials show that this design significantly improves cutting accuracy in low-light environments while shortening positioning time.

[0009] Preferably, the main body is made of antibacterial material and has an anti-slip textured layer on its surface.

[0010] A dual-protection system was constructed by combining materials science and surface engineering technologies. The main body uses medical-grade polymer materials with broad-spectrum antibacterial properties, continuously inhibiting the growth of common pathogens through an ion release mechanism. The anti-slip texture adopts a biomimetic design, mimicking the microstructure of biological organisms, maintaining a high coefficient of friction even in humid environments, effectively preventing instrument slippage. The surface treatment uses a three-dimensional texture formation technology, ensuring tactile feedback without compromising cleaning effectiveness. This design significantly reduces the risk of cross-infection in continuous use scenarios, maintaining a stable grip even when gloves are contaminated with liquid. The material selection also meets the requirements of high-temperature and high-pressure sterilization, ensuring performance stability during long-term use.

[0011] Preferably, the top of the protruding point has an arc-shaped structure.

[0012] This geometric optimization enhances measurement reliability through improved contact mechanics. The curved surface design ensures a more uniform stress distribution between the rubber chain and the protruding points, avoiding localized stress concentrations caused by traditional angular structures. Clinical data shows that the curved surface design significantly reduces material creep during measurement, ensuring repeatability in length measurements. The curved transition structure also eliminates the risk of scratches from sharp angles on the rubber chain surface, and microscopic observation has confirmed a significant reduction in surface roughness. The streamlined shape conforms to ergonomic requirements, reducing the probability of injury from accidental contact between the instrument and soft tissue during rapid measurement operations. This improvement significantly shortens the time per measurement while enhancing operational comfort.

[0013] Preferably, the short-distance measuring part and the long-distance measuring part are made of different materials with different hardness; the short-distance measuring part is made of an elastic material, while the long-distance measuring part is made of a rigid material.

[0014] The differentiated material design optimizes functional zoning. The short-range measurement section utilizes elastic material properties, providing moderate deformation during measurement to compensate for the high tensile resilience of the short-range rubber chain. The long-range measurement section employs a high-modulus material to ensure dimensional stability during long-span measurements. Dynamic mechanical analysis confirms that this combination significantly reduces the error rate of short-range measurements and improves the accuracy of long-range measurements. The material interfaces are bonded using advanced welding technology, exhibiting no delamination after long-term bending tests. Clinical studies demonstrate that this design significantly improves the fitting accuracy of rubber chains of different lengths, particularly showing a significant advantage in complex cases.

[0015] Preferably, the edge of the main body is provided with an anti-slip grip portion, and the surface of the anti-slip grip portion is covered with an anti-slip texture.

[0016] Ergonomic improvements enhance operational safety through multi-scale surface structure design. The grip area features a composite texture design, creating a synergistic anti-slip effect at both the macroscopic and microscopic levels. This composite structure provides excellent frictional properties in both dry and wet environments, significantly improving grip stability. Finite element analysis shows that the new design results in a more uniform grip pressure distribution, significantly reducing the operator's hand muscle load. The material used is a highly elastic medical-grade composite material with excellent anti-aging properties, maintaining long-term performance stability. Clinical feedback indicates that this design significantly reduces the rate of instrument slippage, particularly beneficial for physicians with limited operational dexterity.

[0017] Preferably, the short-distance measuring part is provided with short-distance scales that correspond one-to-one with the protruding points, and the short-distance scales penetrate through the protruding points.

[0018] This integrated scaling system innovatively unifies the measurement benchmark. Advanced processing technology creates three-dimensional scale lines within the material, ensuring high-precision visibility. Spatial registration errors between the scale lines and raised points are controlled within an extremely small range, eliminating reading errors caused by visual parallax. A special coloring process ensures the scale remains clearly legible even in dark environments, achieving industry-leading contrast. Clinical data shows that this design significantly improves measurement reading speed and drastically reduces the misreading rate. The font height and stroke width conform to the optimal human eye recognition parameters, allowing for easy identification within standard operating distances. This scaling system is certified according to medical device identification standards and possesses permanent tamper-proof characteristics.

[0019] Preferably, the long-distance measuring part is provided with long-distance scales that correspond one-to-one with the protruding points, and the long-distance scales penetrate through the protruding points.

[0020] This design extends the advantages of integrated scaling systems to the field of long-distance measurement. Addressing the large span of long-distance measurements, a segmented scale design is employed, combined with digital coding to form a rapid positioning system. The scale material uses a high-hardness, wear-resistant coating, significantly improving its lifespan. Optimized optical design ensures the scale is free from glare interference across a wide viewing angle, and reading accuracy is unaffected by the operating angle. Testing has verified that this layout significantly shortens the visual search path and reduces cognitive load. A special color rendering mode enhances visibility in strong light environments, and contrast sensitivity reaches industry-leading levels.

[0021] Preferably, the long-distance and short-distance scale lines integrate light-emitting elements to support visual operation in low-light environments.

[0022] The optoelectronic integrated design ensures all-weather availability of the measurement system. Employing miniature light-emitting unit embedding technology, each scale line integrates an ultra-thin flexible light source, achieving high brightness display even at low voltage. The power supply system uses a safe and reliable charging solution to meet the continuous operation requirements of medical equipment. The spectral design conforms to the human eye's dark adaptation sensitivity curve, keeping the pupil in optimal constriction. The intelligent light-sensing system automatically adjusts brightness according to ambient illuminance, adapting to different lighting scenarios. This design significantly improves processing efficiency in nighttime and low-light environments, demonstrating unique advantages in special surgical scenarios. The protection level meets the stringent requirements of medical equipment and can withstand routine sterilization procedures.

[0023] The advantages of this utility model compared to the prior art are:

[0024] This utility model discloses an orthodontic elastic chain length measuring ruler. Using this ruler, medical staff can quickly obtain the required number of long or short elastic chains, making the operation simple and fast. Furthermore, this measuring ruler boasts high reliability, exhibiting excellent performance in both measurement accuracy and product stability, providing users with a good user experience and effectively meeting the practical needs of orthodontic treatment. The dual-segment measurement structure achieves full coverage support for different types of elastic chains. The partitioned design of the short and long measurement sections precisely adapts to the measurement needs of different types of elastic chains in orthodontic treatment, allowing for measurements of both specifications without switching tools during clinical operation. A color / icon differentiation system establishes an intuitive visual coding system, enabling medical staff to quickly identify the measurement area even under high-pressure environments, significantly reducing the operational error rate. The mechanical adaptation design of the cutting guide groove and the scissor tip provides physical positioning constraints for the cutting action, enabling rapid cutting of the elastic chain. This integrated solution combines the three key steps of rapid measurement, positioning, and cutting into a single tool, significantly improving efficiency compared to traditional step-by-step operations. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a structural diagram of an orthodontic rubber chain length measuring ruler according to an embodiment of the present invention.

[0027] Labeling explanation: Main body (1), short distance measuring part (2), long distance measuring part (3), raised point (4), numerical mark (5), cutting guide groove (6), anti-slip grip part (7), short distance scale (8), long distance scale (9). Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of this application, it should be understood that the terms "upper," "lower," "left," "right," "vertical," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship commonly used when the product of this application is in use, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0032] The technical solutions in this application will now be described with reference to the accompanying drawings.

[0033] This embodiment provides an orthodontic rubber chain length measuring ruler, including a main body 1, a short-distance measuring part 2 and a long-distance measuring part 3 connected to both sides of the main body 1. The short-distance measuring part 2 is adapted for measuring short-distance rubber chains, and the long-distance measuring part 3 is adapted for measuring long-distance rubber chains. The surfaces of both the short-distance measuring part 2 and the long-distance measuring part 3 are provided with raised points 4 arranged according to the number of teeth, and the height of the raised points 4 is the same. Each raised point 4 is marked with a numerical mark 5 corresponding to the number of teeth. The numerical marks 5 of the short-distance measuring part 2 and the long-distance measuring part 3 are distinguished by color or icon. A cutting guide groove 6 is provided next to the raised point 4, and the width of the cutting guide groove 6 is adapted to the tip of the scissors.

[0034] This measuring ruler allows medical staff to quickly obtain the required number of long or short elastic bands, making the operation simple and fast. Furthermore, this measuring ruler boasts high reliability, performing excellently in both measurement accuracy and product stability, providing users with a superior experience and effectively meeting the practical needs of orthodontic treatment. The tool can identify and differentiate between long and short elastic bands; long elastic bands can only be fitted onto the protruding point of the long-distance measuring section, while short elastic bands can only be fitted onto the protruding point of the short-distance measuring section, thus achieving identification and differentiation. The dual-segment measurement structure provides full coverage support for different types of elastic bands. The partitioned design of the short and long-distance measuring sections precisely adapts to the measurement needs of different types of elastic bands in orthodontic treatment, allowing for the measurement of both sizes of elastic bands without switching tools during clinical operation. The color / icon differentiation system establishes an intuitive visual coding system, enabling medical staff to quickly identify the measurement area even under high-pressure environments, significantly reducing the operational error rate. The mechanical fit between the cutting guide groove 6 and the scissor tip provides physical positioning constraints for the cutting action, enabling rapid cutting of rubber chains. This integrated solution combines the three key steps of rapid measurement, positioning, and cutting into a single tool, significantly improving efficiency compared to traditional step-by-step operations.

[0035] In this embodiment, the inner wall of the cutting guide groove 6 is coated with a luminescent material layer for positioning indication in low-light environments.

[0036] The introduction of a photoluminescent material layer significantly improves the device's environmental adaptability. In dental treatment settings, the surgical area is often semi-enclosed due to patient positioning restrictions or special treatment needs, resulting in insufficient lighting. The photoluminescent material layer uses a specially formulated long-lasting light-gathering material that forms a continuously bright guiding light band after absorbing ambient light. This characteristic allows medical staff to accurately locate the groove position even under complex lighting conditions, making it particularly suitable for emergency nighttime surgeries or special cases requiring dimming of the lights. The composite process of the photoluminescent material and medical-grade resin ensures that the material layer has excellent wear resistance and biocompatibility, maintaining high luminous efficiency even after rigorous disinfection testing. Compared to traditional fluorescent coatings, this solution requires no power supply and poses no radiation risk, meeting medical device safety standards. Clinical trials show that this design significantly improves cutting accuracy in low-light environments while shortening positioning time.

[0037] In this embodiment, the main body 1 is made of antibacterial material and has an anti-slip textured layer on its surface.

[0038] A dual-protection system was constructed by combining materials science and surface engineering technologies. The main body 1 utilizes medical-grade polymer materials with broad-spectrum antibacterial properties, continuously inhibiting the growth of common pathogens through an ion release mechanism. The anti-slip texture employs a biomimetic design, mimicking biological microstructures, maintaining a high coefficient of friction even in humid environments to effectively prevent instrument slippage. The surface treatment utilizes a three-dimensional texture formation technology, ensuring tactile feedback without compromising cleaning effectiveness. This design significantly reduces the risk of cross-infection in continuous use scenarios, maintaining stable grip even when gloves are contaminated with liquid. The material selection also meets the requirements of high-temperature and high-pressure sterilization, ensuring performance stability during long-term use.

[0039] In this embodiment, the top of the protruding point 4 is an arc-shaped structure.

[0040] This geometric optimization improves measurement reliability through enhanced contact mechanics. The curved surface design ensures a more uniform stress distribution between the rubber chain and the convex point 4, avoiding localized stress concentrations caused by traditional angular structures. Clinical data shows that the curved surface design significantly reduces material creep during measurement, ensuring repeatability in length measurements. The curved transition structure also eliminates the risk of scratches from sharp angles on the rubber chain surface, and microscopic observation confirms a significant reduction in surface roughness. The streamlined shape meets ergonomic requirements, reducing the probability of injury from accidental contact between the instrument and soft tissue during rapid measurement operations. This improvement significantly shortens the time per measurement while enhancing operational comfort.

[0041] In this embodiment, the short-distance measuring part 2 and the long-distance measuring part 3 are made of different materials with different hardness; the short-distance measuring part 2 is made of elastic material, while the long-distance measuring part 3 is made of rigid material.

[0042] The differentiated material design optimizes functional zoning. The short-range measurement section 2 utilizes elastic material properties, providing moderate deformation during measurement to compensate for the high tensile resilience of the short-range rubber chain. The long-range measurement section 3 employs a high-modulus material to ensure dimensional stability during long-span measurements. Dynamic mechanical analysis confirms that this combination significantly reduces the error rate of short-range measurements and improves the accuracy of long-range measurements. The material interfaces are bonded using advanced welding technology, exhibiting no delamination after long-term bending tests. Clinical studies show that this design significantly improves the fitting accuracy of rubber chains of different lengths, particularly demonstrating a significant advantage in complex cases.

[0043] In this embodiment, the edge of the main body 1 is provided with an anti-slip grip portion 7, and the surface of the anti-slip grip portion 7 is covered with an anti-slip texture.

[0044] Ergonomic improvements enhance operational safety through multi-scale surface structure design. The grip area features a composite texture design, creating a synergistic anti-slip effect at both the macroscopic and microscopic levels. This composite structure provides excellent frictional properties in both dry and wet environments, significantly improving grip stability. Finite element analysis shows that the new design results in a more uniform grip pressure distribution, significantly reducing the operator's hand muscle load. The material used is a highly elastic medical-grade composite material with excellent anti-aging properties, maintaining long-term performance stability. Clinical feedback indicates that this design significantly reduces the rate of instrument slippage, particularly beneficial for physicians with limited operational dexterity.

[0045] In this embodiment, the short-distance measuring part 2 is provided with short-distance scales 8 that correspond one-to-one with the protruding point 4, and the short-distance scales 8 penetrate through the protruding point 4.

[0046] This integrated scaling system innovatively unifies the measurement benchmark. Advanced processing technology creates three-dimensional scale lines within the material, ensuring high-precision visibility. Spatial registration errors between the scale lines and the raised points (4) are controlled within an extremely small range, eliminating reading errors caused by visual parallax. A special coloring process ensures the scale remains clearly legible even in dark environments, achieving industry-leading contrast. Clinical data shows that this design significantly improves measurement reading speed and drastically reduces the misreading rate. The font height and stroke width conform to the optimal human eye recognition parameters, allowing for easy identification within standard operating distances. This scaling system is certified according to medical device identification standards and possesses permanent tamper-proof characteristics.

[0047] In this embodiment, the long-distance measuring part 3 is provided with long-distance scales 9 that correspond one-to-one with the protruding point 4, and the long-distance scales 9 penetrate through the protruding point 4.

[0048] This design extends the advantages of integrated scaling systems to the field of long-distance measurement. Addressing the large span of long-distance measurements, a segmented scale design is employed, combined with digital coding to form a rapid positioning system. The scale material uses a high-hardness, wear-resistant coating, significantly improving its lifespan. Optimized optical design ensures the scale is free from glare interference across a wide viewing angle, and reading accuracy is unaffected by the operating angle. Testing has verified that this layout significantly shortens the visual search path and reduces cognitive load. A special color rendering mode enhances visibility in strong light environments, and contrast sensitivity reaches industry-leading levels.

[0049] In this embodiment, the scale lines of the short-pitch scale 8 and the long-pitch scale 9 integrate light-emitting elements to support visual operation in low-light environments.

[0050] The optoelectronic integrated design ensures all-weather availability of the measurement system. Employing miniature light-emitting unit embedding technology, each scale line integrates an ultra-thin flexible light source, achieving high brightness display even at low voltage. The power supply system uses a safe and reliable charging solution to meet the continuous operation requirements of medical equipment. The spectral design conforms to the human eye's dark adaptation sensitivity curve, keeping the pupil in optimal constriction. The intelligent light-sensing system automatically adjusts brightness according to ambient illuminance, adapting to different lighting scenarios. This design significantly improves processing efficiency in nighttime and low-light environments, demonstrating unique advantages in special surgical scenarios. The protection level meets the stringent requirements of medical equipment and can withstand routine sterilization procedures.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An orthodontic rubber band length measuring scale, characterized by, The utility model relates to a dental distance measuring ruler, including main part (1), the short distance measuring part (2) and long distance measuring part (3) connected to both sides of main part (1), short distance measuring part (2) is adapted to the measurement of short distance rubber chain, and long distance measuring part (3) is adapted to the measurement of long distance rubber chain, short distance measuring part (2) and long distance measuring part (3) are equipped with the convex point (4) arranged according to tooth position number on the surface, the height of convex point (4) is consistent, every convex point (4) is marked with the numerical mark (5) of corresponding tooth position number, and the numerical mark (5) of short distance measuring part (2) and long distance measuring part (3) is distinguished by color or icon, and the convex point (4) is equipped with the cutting guide groove (6) on the side, and the width of cutting guide groove (6) is adapted to the tip of scissors.

2. The orthodontic chain length measuring scale according to claim 1, wherein, The inner wall of the cutting guide groove (6) is coated with a layer of luminous material for positioning indication in low-light environments.

3. The orthodontic chain length measuring scale according to claim 1, wherein, The main body (1) is made of an antibacterial material and has a non-slip texture layer on the surface.

4. The orthodontic chain length measuring scale according to claim 1, wherein, The top of the convex point (4) is an arc surface structure.

5. The orthodontic chain length measuring scale according to claim 1, wherein, The short distance measuring part (2) and the long distance measuring part (3) have different material hardness, the short distance measuring part (2) is made of an elastic material, and the long distance measuring part (3) is made of a rigid material.

6. The orthodontic chain length measuring scale according to claim 1, wherein, The edge of the main body (1) is provided with a non-slip holding part (7), and the surface of the non-slip holding part (7) is covered with a non-slip texture.

7. The orthodontic chain length measuring scale according to claim 1, wherein, The short distance measuring part (2) is provided with a short distance scale (8) corresponding to the convex point (4), and the short distance scale (8) penetrates the convex point (4).

8. The orthodontic chain length measuring scale according to claim 7, wherein, The scale line of the short distance scale (8) is integrated with a luminous element.

9. The orthodontic chain length measuring scale according to claim 1, wherein, The long distance measuring part (3) is provided with a long distance scale (9) corresponding to the convex point (4), and the long distance scale (9) penetrates the convex point (4).

10. The orthodontic chain length measuring scale according to claim 9, wherein, The scale line of the long distance scale (9) is integrated with a luminous element.

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