Shell-shaped dental instrument

Abstract

The utility model discloses a shell dental instrument for jaw position relation adjustment contains the first shell body of containing maxillary teeth and the second shell body of containing mandibular teeth. The first shell body rear tooth area is provided with the first protruding portion to the first shell body rear tooth area, and the mesial side has the first guide plane that inclines to the distal tooth end from the near tooth end and extends to the distal side downward; The second protruding portion is provided to the second shell body rear tooth area upward, and the distal side has the second guide plane that is parallel with the first guide plane. Wherein, two guide planes are provided with first and second guide members along the long axis respectively, and the two are matched guide male and female parts (male is arranged in any guide plane, and female is arranged in another guide plane correspondingly). The male outer surface or female inner surface is provided with at least one first guide component, makes guide male and female parts linear contact relative sliding, and drives guide plane movement to guide mandibular sagittal to target position, at this moment, the occlusal surface of two protruding portions is contacted with the occlusal surface of corresponding shell body respectively.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, more specifically to the field of dental instruments, and particularly to a shell-shaped dental instrument for adjusting jaw position. Background Technology

[0002] Malocclusion refers to imbalances in the position and relationship of teeth, dental arches, jawbones, and craniofacial structures. Common symptoms include crowded teeth, interdental spaces, and reverse overbite. Most malocclusions occur during childhood growth and development due to congenital genetic factors or acquired environmental factors such as diseases, poor oral habits, and delayed tooth eruption. They can also develop after growth and development due to trauma, periodontal disease, etc., resulting in conditions such as misaligned teeth, abnormal occlusal relationships between the upper and lower dental arches, abnormalities in the size, shape, and position of the jawbone, and facial deformities. Shell-shaped orthodontic appliances are devices used to treat malocclusion. They are made of safe, elastic, transparent polymer materials, allowing the treatment process to be completed almost imperceptibly. For cases with sagittal jaw position factors, jaw reconstruction is required to correct the jaw position, achieving mandibular anterior or posterior guidance.

[0003] Existing clear aligners for jaw reconstruction include TB (short for Twin-block, also known as double-plate appliance), which promotes mandibular growth while retracting the upper anterior teeth. By functionally advancing the mandible through an adjusted occlusal slope, it corrects the misalignment between the upper and lower jaws. The masticatory muscle system must guide the mandible into a protruding position to adapt to the changed occlusal balance system, typically used to guide chin protrusion. The structure of a TB (Tooth Bite) appliance needs to stably and smoothly adjust the positional relationship of the upper and lower jaws to the target position during occlusion. For example, in the shell-shaped dental appliance provided by Chinese patents CN202120262757.3 and CN202110131060.7, mutually cooperating reinforcing members are provided on the mesial and distal surfaces of the protrusions on the shell-shaped dental appliance, which are in contact with and slide against each other. The reinforcing members have a sliding guiding function, which greatly reduces or even avoids the unexpected displacement phenomenon in the buccal-lingual direction when the protrusions slide against each other to guide the mandible forward or retract the mandible. This allows the first reinforcing member and the second reinforcing member to accurately guide the upper and lower jaws to the preset occlusal position when they slide relative to each other. While the aforementioned reinforcing components effectively solved the problem of buccal-lingual displacement that might occur during sliding, the applicant found in subsequent clinical practice that the shell-shaped dental instrument did not achieve good results in terms of the smoothness of sliding. This is because, during sliding, the first and second reinforcing components are matched in concave and convex shape, which can play a good guiding role, but also increases the contact area between the two protrusions, increasing the sliding resistance and making the relative sliding efficiency not high. Utility Model Content

[0004] The technical problem solved by this invention is to overcome the defects of the existing technology and provide a shell-shaped dental instrument for adjusting jaw position that can guide with high precision, low sliding resistance and high sliding smoothness during occlusion.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A shell-shaped dental instrument for adjusting jaw position has a first shell-shaped body that accommodates multiple maxillary teeth of a patient, and a second shell-shaped body that accommodates multiple mandibular teeth of a patient. The first shell-shaped body has a first protrusion protruding downwards in the posterior tooth region to guide the adjustment of the maxillary-mandibular relationship. The second shell-shaped body has a second protrusion protruding upwards in the posterior tooth region to guide the adjustment of the maxillary-mandibular relationship. A first guide plane interacting with the second protrusion is provided on the mesial side of the first protrusion. The first guide plane is inclined downwards and distally from the mesial tooth end to the distal tooth end. A second guide plane interacting with the first guide plane is provided on the distal side of the second protrusion. The first guide plane and the second guide plane are parallel to each other. A first guide member is provided through the first guide plane along its vertical direction. A second guide member is provided through the second guide plane along its vertical direction. The first guide member and the second guide member are a set of interacting guide protrusions and guide recesses. Wherein, the guide protrusion is protruding on the first guide plane, and the guide recess is recessed on the second guide plane at a position corresponding to the guide protrusion; or, the guide protrusion is protruding on the second guide plane, and the guide recess is recessed on the first guide plane at a position corresponding to the guide protrusion. At least one first guiding member is provided protruding from the outer surface of the guiding protrusion or the inner surface of the guiding concave. The first guiding member enables the guiding protrusion and the guiding concave to slide relative to each other in a line contact manner, so as to drive the first guiding plane and the second guiding plane to move relative to each other, guiding the mandible to move forward in a sagittal direction to the target position. At the target position, the first occlusal surface of the first protrusion contacts the occlusal surface at the corresponding position of the second shell-shaped body, and the second occlusal surface of the second protrusion contacts the occlusal surface at the corresponding position of the first shell-shaped body.

[0006] This design serves several purposes. First, the interlocking of the first and second guide elements (guide protrusions and guide recesses) allows the two protrusions to slide relative to each other without deviation during occlusion, providing precise guidance to ensure that the mandibular movement does not deviate. Second, by protruding at least one first guide member on the outer surface of the guide protrusion or the inner surface of the guide recess, the guide protrusion and guide recess slide relative to each other through line contact. This line contact sliding, achieved through the contact surface between the first guide member and the other protrusion, replaces the surface contact in the prior art, significantly reducing sliding resistance and ensuring the flexibility and smoothness of the two protrusions during relative sliding, thus enabling the mandible to smoothly advance to the target position. Third, at the target position, the occlusal surfaces of the two protrusions contact the corresponding shell-shaped body occlusal surfaces, ensuring the stability and reliability of the mandible after it has advanced to the target position, which is beneficial for achieving the orthodontic goal. In summary, the close coordination between the various technical features of the shell-shaped dental instrument of this application can solve the problems of the prior art, accurately guide the two protrusions and allow them to slide smoothly relative to each other with low sliding resistance, and after reaching the target position, it can be firmly stabilized in the target position, thereby ensuring the achievement of the orthodontic goal.

[0007] Preferably, the guiding protrusion includes a buccal side surface facing the buccal side and a lingual side surface facing the lingual side, and a top surface disposed between the buccal side surface and the lingual side surface; the first guiding member is disposed on the top surface of the guiding protrusion, and / or, the first guiding member is disposed on the buccal side surface or the lingual side surface of the guiding protrusion; or, the first guiding member is disposed on the top surface, the lingual side surface, and the buccal side surface of the guiding protrusion. By setting the first guiding member in multiple positions, the flexibility of the first guiding member setting is improved, and it can be flexibly set according to different teeth, making it more applicable.

[0008] Preferably, when the first guide member is provided on the top surface of the guide protrusion, the first guide member is located at the middle position of the top surface along the buccal-lingual direction; when the first guide member is provided on both the buccal and lingual side surfaces of the guide protrusion, the first guide member is symmetrically arranged on the buccal and lingual side surfaces of the guide protrusion. By providing the first guide member on the top surface of the guide protrusion or symmetrically arranged on the buccal-lingual side of the guide protrusion, balanced force in the buccal-lingual direction can be ensured, avoiding deflection during sliding and facilitating precise guidance of the two protrusions.

[0009] Preferably, the guiding recess includes a buccal side facing the buccal side and a lingual side facing the lingual side, and a bottom surface disposed between the buccal side and the lingual side; the first guiding member is disposed on the bottom surface of the guiding recess, and / or, the first guiding member is disposed on the buccal side or the lingual side of the guiding recess; or, the first guiding member is disposed on the bottom surface, the lingual side, and the buccal side of the guiding recess. By setting the first guiding member in multiple positions, the flexibility of the first guiding member setting is improved, and it can be flexibly set according to different teeth, making it more applicable.

[0010] Preferably, when the first guide member is provided on the bottom surface of the guide recess, the first guide member is positioned at the middle of the bottom surface along the buccal-lingual direction; when the first guide member is provided on both the buccal and lingual sides of the guide recess, the first guide member is symmetrically arranged on the buccal and lingual sides of the guide recess. By providing the first guide member on the top surface of the guide recess or symmetrically arranged on the buccal-lingual sides of the guide recess, balanced force in the buccal-lingual direction can be ensured, avoiding deflection during sliding and facilitating precise guidance of the two protrusions.

[0011] Preferably, the outer contour shape of the guide protrusion and the inner contour shape of the guide recess are consistent, and the cross-sections of both the guide protrusion and the guide recess are rectangular or arc-shaped. This consistent shape between the guide protrusion and the guide recess helps improve their fitting accuracy and reduces unnecessary friction and wear.

[0012] Preferably, the outer contour shape of the first guide member is a spherical cap, an ellipsoidal cap, or a triangular prism. By setting the first guide member to a spherical cap, an ellipsoidal cap, or a triangular prism structure, line contact with the corresponding contact surface is achieved, further reducing sliding resistance, making sliding flexible and smooth, reducing the risk of "jamming," and improving the patient's user experience.

[0013] Preferably, the outer contour shape of the first guide member is a spherical cap, the ratio of the cap height to the chord length of the cap ranging from 1 / 5 to 1 / 2, and the radius of the sphere ranging from 0.5 mm to 0.8 mm; or, the outer contour shape of the first guide member is an ellipsoidal cap, the ratio of the cap height to the major axis of the elliptical base ranging from 1 / 5 to 1 / 2, and the major axis of the elliptical base ranging from 1 mm to 1.6 mm; or, the outer contour shape of the first guide member is a triangular prism, the cross-section of which is an isosceles triangle, and the included angle α between the two isosceles sides of the isosceles triangle satisfies: 60°≤α≤160°. Optimizing the dimensional proportions ensures moderate pressure when the first guide member contacts the corresponding contact surface, ensuring smooth sliding and comfort and durability.

[0014] Preferably, when the first guide member is disposed on the first protrusion, the first guide member and the first protrusion are formed by 3D printing; or, when the first guide member is disposed on the second protrusion, the first guide member and the second protrusion are formed by 3D printing. A structure can be 3D printed as a single unit, ensuring reliable connections between structural components and eliminating the risk of detachment; alternatively, separate components can be 3D printed and then assembled together by bonding or laser welding. Manufacturing through 3D printing technology can improve production precision and facilitate personalized customization.

[0015] Preferably, a first retention portion is provided on the first occlusal surface of the first protrusion facing the mandible, and a second retention portion is provided on the mandibular occlusal surface corresponding to the position of the first retention portion, matching the concavity and convexity of the first retention portion. At the target position, the first retention portion and the second retention portion are concavity-convex to stabilize the first shell-shaped body and the second shell-shaped body at the target position. The first retention portion is a protrusion protruding towards the mandibular occlusal surface, and the second retention portion is a concave portion matching the protrusion. Alternatively, the first retention portion is a concave portion formed by a portion of the surface of the first occlusal surface concave inward toward the occlusal tooth, and the second retention portion is a protrusion matching the concave portion. This concavity-convex matching structure enhances stability, ensuring that after reaching the target position, the relative positional relationship between the first shell-shaped body and the second shell-shaped body of the upper and lower jaws remains stable at the target position, avoiding displacement or other situations detrimental to jaw stability.

[0016] Preferably, when the second retaining portion is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, or the bottom surface of the recess is located at a predetermined height above the occlusal surface of the tooth where the recess is located.

[0017] Preferably, a third retention portion is provided on the second occlusal surface of the second protrusion facing the maxilla, and a fourth retention portion matching the third retention portion is provided on the maxillary occlusal surface of the first shell-shaped body at the location of the third retention portion. At the target position, the third retention portion and the fourth retention portion match to stabilize the first shell-shaped body and the second shell-shaped body at the target position. The third retention portion is a protrusion protruding towards the maxillary occlusal surface, and the fourth retention portion is a concave portion matching the protrusion. Alternatively, the third retention portion is a concave portion formed by a portion of the second occlusal surface recessed inward toward the main tooth, and the fourth retention portion is a protrusion matching the concave portion. This matching structure enhances stability, ensuring that the relative positional relationship between the first and second shell-shaped bodies of the upper and lower jaws remains stable at the target position, preventing displacement or other situations detrimental to jaw stability.

[0018] Preferably, when the fourth retaining portion is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, or the bottom surface of the recess is located at a predetermined height above the occlusal surface of the tooth where the recess is located.

[0019] Preferably, the first guiding plane includes a first main guiding surface and a first auxiliary guiding surface. The first main guiding surface is the outer surface of the guiding protrusion or the inner surface of the guiding concave part. The first auxiliary guiding surface is a plane on the first guiding plane other than the first main guiding surface. A plurality of second guiding members protrude from the first auxiliary guiding surface in a direction away from the first auxiliary guiding surface. When the first guiding plane and the second guiding plane slide relative to each other, the second guiding members slide relative to the second guiding plane in a line contact manner. By also providing second guiding members with a line contact structure on the first auxiliary guiding surface, the smoothness and stability during relative sliding can be further improved.

[0020] Preferably, when the first guiding member is disposed on the first auxiliary guiding surface, the first guiding member is disposed along the vertical direction of the first auxiliary guiding surface. By aligning the second guiding member and the first guiding member in the same direction, smooth mandibular guidance is ensured, further improving the smoothness of relative sliding.

[0021] Preferably, the second guiding plane includes a second main guiding surface and a second auxiliary guiding surface. The second main guiding surface is the outer surface of the guiding protrusion or the inner surface of the guiding concave part. The second auxiliary guiding surface is a plane on the second guiding plane other than the second main guiding surface. A plurality of second guiding members protrude from the second auxiliary guiding surface in a direction away from the second auxiliary guiding surface. When the first guiding plane and the second guiding plane slide relative to each other, the second guiding members slide relative to the first guiding plane in a line contact manner. By also providing second guiding members with a line contact structure on the second auxiliary guiding surface, the smoothness and stability during relative sliding can be further improved.

[0022] Preferably, when the second guiding member is disposed on the second auxiliary guiding surface, the second guiding member is disposed along the vertical direction of the second auxiliary guiding surface. By aligning the second guiding member and the first guiding member in the same direction, smooth mandibular guidance is ensured, further improving the smoothness of relative sliding. Attached Figure Description

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same numerical reference numerals are denoted as similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale.

[0024] Figure 1 This is a schematic diagram of the structure of a shell-shaped dental orthodontic instrument according to Embodiment 1 of this utility model; Figure 2 This is a schematic diagram showing the relative positional relationship between the first and second protrusions of the shell-shaped dental orthodontic instrument in Embodiment 1 of this utility model during the biting process. Figure 3 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment 1 of this utility model; Figure 4 This is a cross-sectional schematic diagram of a first protrusion and a second protrusion in Embodiment 1 of this utility model; Figure 5 This is a cross-sectional schematic diagram of another first protrusion and a second protrusion in Embodiment 1 of this utility model; Figure 6 This is a cross-sectional schematic diagram of another first protrusion and a second protrusion in Embodiment 1 of this utility model; Figure 7 This is a cross-sectional schematic diagram of a first guiding component in Embodiment 1 of this utility model; Figure 8 This is a cross-sectional schematic diagram of another first guiding component in Embodiment 1 of this utility model; Figure 9This is a cross-sectional schematic diagram of another first guiding component in Embodiment 1 of this utility model; Figure 10 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment 2 of this utility model; Figure 11 This is a cross-sectional schematic diagram of a first protrusion and a second protrusion in Embodiment 2 of this utility model; Figure 12 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment 3 of this utility model; Figure 13 This is a cross-sectional schematic diagram of a first protrusion and a second protrusion in Embodiment 3 of this utility model; Figure 14 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment 4 of this utility model; Figure 15 This is a cross-sectional schematic diagram of a first protrusion and a second protrusion in Embodiment 4 of this utility model; Figure 16 This is a schematic diagram of the structure of a shell-shaped dental instrument in Embodiment 5 of this utility model; Figure 17 This is a schematic diagram of another shell-shaped dental instrument in Embodiment 5 of this utility model; Figure 18 for Figure 17 A magnified view of a portion of region A in the middle; Figure 19 This is a schematic diagram of the structure of another shell-shaped dental instrument in Embodiment 5 of this utility model; Figure 20 This is a schematic diagram of the structure of another shell-shaped dental instrument in Embodiment 5 of this utility model; Figure 21 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment Six of this utility model; Figure 22 This is a schematic diagram of another type of first protrusion and second protrusion in Embodiment Six of this utility model; Figure 23 This is a schematic diagram of the structure of a first protrusion and a second protrusion in Embodiment 7 of this utility model; Figure 24 This is a schematic diagram of another type of first protrusion and second protrusion in Embodiment 7 of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the various embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this utility model to facilitate a better understanding of the invention. However, the technical solutions claimed by this utility model can be implemented even without these technical details and with various variations and modifications based on the following embodiments. The division of the various embodiments below is for ease of description and should not constitute any limitation on the specific implementation of this utility model.

[0026] The directional terms "up," "down," "left," and "right" used in this document refer to the directions shown in the accompanying drawings and do not imply any specific limitation. Unless otherwise explicitly stated or limited, the term "connection" in this document should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part of a structure. It can refer to a direct connection or an indirect connection through an intermediate medium.

[0027] In the various embodiments of this invention, the term "posterior tooth region" is defined according to the classification of teeth in the 2nd edition of *Introduction to Stomatology*, published by Peking University Medical Press, pages 36-38. It includes premolars and molars, teeth marked as 4-8 using the FDI notation, and teeth marked as 1-3 using the FDI notation for the anterior tooth region. The teeth in the anterior tooth region include the central incisors, lateral incisors, and canines.

[0028] As described in the background art, in the prior art, in the clear aligner for jaw reconstruction, mutually cooperating reinforcing members are provided on the mesial and distal surfaces of the protrusions on the shell-shaped dental instrument, where they contact and slide against each other. Although the setting of these reinforcing members effectively solves the problem of buccal-lingual displacement that may occur during sliding, the applicant found in subsequent clinical practice that the aforementioned shell-shaped dental instrument did not achieve good results in terms of the smoothness of sliding. This is because, during the sliding process, the first reinforcing member and the second reinforcing member are concave and convex, which can play a good guiding role, but also increases the contact area between the two protrusions, increasing the sliding resistance and making the efficiency of relative sliding not high, thus affecting the achievement of the orthodontic goal.

[0029] Based on this, this application provides a shell-shaped dental instrument for adjusting jaw position, having a first shell-shaped body that accommodates multiple maxillary teeth of a patient, and a second shell-shaped body that accommodates multiple mandibular teeth of a patient. The first shell-shaped body has a first protrusion protruding downward in the mandibular direction in the posterior tooth region, and the second shell-shaped body has a second protrusion protruding upward in the mandibular direction in the posterior tooth region, which is also a guide plane that guides the adjustment of the maxillary-mandibular relationship. A first guide plane that interacts with the second protrusion is provided on the mesial side of the first protrusion. The first guide plane is inclined downward from the mesial tooth end to the distal tooth end and is arranged in the distal direction. A second guide plane that interacts with the first guide plane is provided on the distal side of the second protrusion. The first guide plane and the second guide plane are arranged parallel to each other. A first guide member is provided through the first guide plane in the vertical direction, and a second guide member is provided through the second guide plane in the vertical direction. The first guide member and the second guide member are a set of interacting guide protrusions and guide recesses. Wherein, the guide protrusion is protruding on the first guide plane, and the guide recess is recessed on the second guide plane at a position corresponding to the guide protrusion; or, the guide protrusion is protruding on the second guide plane, and the guide recess is recessed on the first guide plane at a position corresponding to the guide protrusion. At least one first guiding member is provided protruding from the outer surface of the guiding protrusion or the inner surface of the guiding concave. The first guiding member enables the guiding protrusion and the guiding concave to slide relative to each other in a line contact manner, so as to drive the first guiding plane and the second guiding plane to move relative to each other, guiding the mandible to move forward in a sagittal direction to the target position. At the target position, the first occlusal surface of the first protrusion contacts the occlusal surface at the corresponding position of the second shell-shaped body, and the second occlusal surface of the second protrusion contacts the occlusal surface at the corresponding position of the first shell-shaped body.

[0030] This application provides first and second guide members that extend along the long axis of two guide planes (the first guide plane and the second guide plane), respectively. These are mating guide protrusions and guide recesses (the guide protrusion can be located on either guide plane, and the guide recess is correspondingly located on the other guide plane). The convex-concave mating of the first and second guide members (guide protrusion and guide recess) guides the two protrusions to slide relative to each other without deviation during occlusion, providing precise guidance for the relative sliding of the two protrusions to ensure that mandibular disorientation does not deviate. The outer surface of the guide protrusion or the inner surface of the guide recess is convex. At least one first guiding member is provided, allowing the guiding protrusion and guiding concave part to slide relative to each other in line contact. This drives the movement of two guiding planes to guide the mandible sagittally to the target position. By protruding at least one first guiding member on the outer surface of the guiding protrusion or the inner surface of the guiding concave part, the guiding protrusion and guiding concave part slide relative to each other in line contact. The sliding is achieved through the contact surface between the first guiding member and the other protrusion, replacing the surface contact in the prior art. The sliding resistance is significantly reduced, ensuring the flexibility and smoothness of the two protrusions during relative sliding, thereby enabling the mandible to be smoothly guided to the target position. At the target position, the occlusal surfaces of the two protrusions contact the corresponding shell-shaped body occlusal surfaces, ensuring the stability and reliability of the mandible after it is guided to the target position, which is conducive to achieving the orthodontic goal.

[0031] In summary, the close coordination between the various technical features of the shell-shaped dental instrument of this application can solve the problems of the prior art, accurately guide the two protrusions and allow them to slide smoothly relative to each other with low sliding resistance, and after reaching the target position, it can be firmly stabilized in the target position, thereby ensuring the achievement of the orthodontic goal.

[0032] The following will provide a detailed explanation in conjunction with the illustrations. Example

[0033] Please refer to Figures 1 to 3 As shown, the shell-shaped dental instrument 100 for adjusting jaw position provided in this application has a first shell-shaped body 1 that accommodates multiple maxillary teeth of the patient, and a second shell-shaped body 2 that accommodates multiple mandibular teeth of the patient. The first shell-shaped body 1 has a first protrusion 3 protruding downward in the mandibular direction in the posterior tooth region, which guides the adjustment of the maxillary-mandibular position. The second shell-shaped body 2 has a second protrusion 4 protruding upward in the mandibular direction in the posterior tooth region, which guides the adjustment of the maxillary-mandibular position. A first guide plane 31 that interacts with the second protrusion 4 is provided on the mesial side of the first protrusion 3. The first guide plane 31 is inclined downward from the mesial tooth end to the distal tooth end and is provided in the distal direction. A second guide plane 41 that interacts with the first guide plane 31 is provided on the distal side of the second protrusion 4.

[0034] The first guide plane 31 and the second guide plane 41 are arranged parallel to each other. A first guide member 5 is provided through the first guide plane 31 along the vertical direction Z of the first guide plane 31. A second guide member 6 is provided through the second guide plane 41 along the vertical direction of the second guide plane 41 (parallel to the vertical direction Z of the first guide plane 31). The first guide member 5 and the second guide member 6 are a set of interacting guide protrusions and guide concaves. The outer contour shape of the guide protrusion and the inner contour shape of the guide concave are the same.

[0035] In this embodiment, the first guide member 5 is a guide protrusion, and the second guide member 6 is a guide concave member. The guide protrusion protrudes from the first guide plane 31, and the guide concave member is recessed into the second guide plane 41 at a position corresponding to the guide protrusion. A first guide member 7 protrudes from the outer surface of the guide protrusion. The structural features of the first guide member 7 satisfy the following: the first guide member 7 allows the guide protrusion and the guide concave member to slide relative to each other in a line contact manner, thereby greatly reducing the contact area between the guide protrusion and the guide concave member. This reduces the sliding resistance of the relative movement between the first guide plane 31 and the second guide plane 41, thereby guiding the mandible to move smoothly and flexibly forward in the sagittal direction to the target position, improving patient comfort and cooperation, and facilitating the achievement of the orthodontic goal. The target position is the relative position of the upper and lower jaws designed by the doctor or medical designer for the patient according to the treatment plan. This target position can be the final target position of the entire treatment plan or a stage target position of a certain orthodontic phase within the treatment plan. Moreover, at the target location, the first engagement surface 32 of the first protrusion 3 contacts the engagement surface at the corresponding location of the second shell-shaped body 2, and the second engagement surface 42 of the second protrusion 4 contacts the engagement surface at the corresponding location of the first shell-shaped body 1.

[0036] This application, through the aforementioned technical solution, achieves several advantages. Firstly, the convex-concave fit of the first guide 5 and the second guide 6 (guide protrusion and guide concave) guides the two protrusions to slide relative to each other without deviation during occlusion, providing precise guidance for the relative sliding of the two protrusions to ensure that the mandibular movement does not deviate. Secondly, by providing at least one first guide member 7 protruding from the outer surface of the guide protrusion or the inner surface of the guide concave, the guide protrusion and guide concave slide relative to each other through line contact. The sliding is achieved through the contact surface between the first guide member and the other protrusion, replacing the surface contact in the prior art. This significantly reduces sliding resistance, ensuring the flexibility and smoothness of the two protrusions during relative sliding, thereby enabling the mandible to be smoothly guided to the target position. Furthermore, at the target position, the occlusal surfaces of the two protrusions contact the corresponding shell-shaped body occlusal surfaces, ensuring the stability and reliability of the mandible after it is guided to the target position, which is beneficial for achieving the orthodontic goal. In summary, through the close coordination of the various technical features of the shell-shaped dental instrument 100 of this application, the problems of the prior art can be solved. It can accurately guide the two protrusions and allow them to slide smoothly relative to each other with low sliding resistance. After reaching the target position, it can be reliably stabilized in the target position, thereby ensuring the achievement of the orthodontic goal.

[0037] The location of the first guiding member 7 is further explained below. It should be noted that the guiding protrusion includes a cheek-side side surface facing the cheek and a tongue-side side surface facing the tongue, as well as a top surface disposed between the cheek-side side surface and the tongue-side side surface. In a specific embodiment, please refer to [reference needed]. Figure 4 As shown, the first guiding member 7 is only disposed on the top surface of the guiding protrusion; preferably, the first guiding member 7 is disposed at the middle position of the top surface along the buccal-lingual direction, which can ensure the balanced force in the buccal-lingual direction, avoid deviation during sliding, and facilitate precise guidance of the relative sliding between the first and second protrusions 4. It can be understood that multiple first guiding members 7 can also be disposed on the top surface, which can achieve more stable line contact sliding. Preferably, when multiple first guiding members 7 are disposed on the top surface, the multiple first guiding members 7 can be evenly distributed on the top surface along the buccal-lingual direction, that is, the distance between adjacent first guiding members 7 is consistent. In this way, the buccal-lingual balance during force sliding can be ensured, which is conducive to guiding the relative sliding between the first protrusion 3 and the second protrusion 4 without deviation, achieving precise guidance, and facilitating the achievement of the correction goal.

[0038] In another specific implementation, please refer to [reference needed]. Figure 5As shown, the first guide member 7 is disposed on the top surface, the tongue-side side surface, and the cheek-side side surface of the guide protrusion, respectively, and slides in contact with the corresponding position lines of the guide recess. Preferably, when the first guide member 7 is disposed on both the cheek-side side surface and the tongue-side side surface of the guide protrusion, the first guide member 7 disposed on the cheek-side side surface and the first guide member 7 disposed on the tongue-side side surface are symmetrically disposed on the cheek-side side surface and the tongue-side side surface of the guide protrusion about the center line L1 of the guide protrusion. In this configuration, the symmetrically disposed first guide members 7 can ensure balanced force in the cheek and tongue directions, avoid deflection during sliding, and facilitate precise guidance of the two protrusions.

[0039] In some specific embodiments, the first guiding member 7 may be disposed only on the buccal side surface of the guiding protrusion; or it may be disposed only on the lingual side surface of the guiding protrusion. It is understood that when multiple first guiding members 7 are disposed on the buccal side surface of the guiding protrusion, the multiple first guiding members 7 may be evenly spaced along the buccal-lingual direction on the buccal side surface, that is, the distance between adjacent first guiding members 7 is consistent; similarly, when multiple first guiding members 7 are disposed on the lingual side surface of the guiding protrusion, the multiple first guiding members 7 may be evenly spaced along the buccal-lingual direction on the lingual side surface, that is, the distance between adjacent first guiding members 7 is consistent; thus, buccal-lingual balance during sliding under force can be ensured, which is beneficial for guiding the relative sliding between the first and second protrusions 4 without deviation, achieving precise guidance, and facilitating the achievement of the correction goal.

[0040] Further, as mentioned above, the outer contour shape of the guide protrusion and the inner contour shape of the guide recess are consistent. It should be noted that "consistent shape" here only refers to the fact that the outer contour shape of the guide protrusion and the inner contour shape of the guide recess are the same, but their sizes are different. The outer contour shape of the guide protrusion can be a proportionally scaled-down version of the inner contour shape of the guide recess. That is, the guide protrusion can still slide within the guide recess after the first guide member 7 is provided. This sliding is achieved through the initial contact of the first guide member 7. Preferably, the size difference between the outer contour of the guide protrusion and the inner contour of the guide recess is small, and the difference can be the protrusion height of the first guide member 7 protruding from the guide protrusion.

[0041] To further explain, typically, both the guide protrusion and the guide recess have rectangular or arc-shaped cross-sections. The cross-section refers to the section of the guide protrusion or guide recess along a direction perpendicular to its respective vertical direction. Please refer to [reference needed]. Figure 6As shown, both the guide protrusion and the guide recess have rectangular cross-sections, and the outer contour dimension of the guide protrusion is slightly smaller than the inner contour dimension of the guide recess. Figure 6 In the illustrated embodiment, the top surface, buccal surface, and lingual surface are more clearly shown. Specifically, the surface of the rectangle with its long side away from the first guide plane 31 is the top surface of the guide protrusion, and the surfaces with their short sides near the buccal side and near the lingual side are the buccal side surface and the lingual side surface, respectively. The first guide member 7 is disposed on the top surface, the lingual side surface, and the buccal side surface of the guide protrusion, and slides relative to the corresponding positions of the guide recess in a line contact manner. Preferably, when the first guide member 7 is disposed on both the buccal side surface and the lingual side surface of the guide protrusion, the first guide member 7 disposed on the buccal side surface and the first guide member 7 disposed on the lingual side surface are symmetrically disposed on the buccal side surface and the lingual side surface of the guide protrusion. This symmetrical arrangement of the first guide members 7 ensures balanced force in the buccal and lingual directions, avoids deflection during sliding, and facilitates precise guidance of the two protrusions.

[0042] In other embodiments, please continue to refer to Figure 4 and Figure 5 As shown, the cross-sections of both the guide protrusion and the guide recess are arc-shaped, and the outer contour dimension of the guide protrusion is slightly smaller than the inner contour dimension of the guide recess.

[0043] Further explanation: the outer contour shape of the first guiding member 7. Please refer to [reference needed]. Figures 7 to 9 As shown, the outer contour shape of the first guide member 7 can be a spherical crown, an ellipsoidal crown, or a triangular prism. This structural arrangement allows the first guide member 7 to slide relative to the guide concave member in a line contact manner when sliding along the guide concave member, further reducing sliding resistance, making sliding more flexible and smooth, reducing the risk of "jamming", and improving the patient's user experience.

[0044] Specifically, in some embodiments, the outer contour shape of the first guide member 7 is a spherical crown shape. The larger the ratio of crown height to chord length, r1 / R1, the smaller the frictional resistance during line contact sliding, but the lower the stability during sliding. Conversely, the smaller the ratio of crown height to chord length, r1 / R1, the greater the stability during line contact sliding, but the greater the frictional resistance during sliding. In this application, the ratio of crown height to chord length, r1 / R1, ranges from 1 / 5 to 1 / 2. Considering the limited surface area of ​​the first guide surface 32, the radius of the sphere in this application ranges from 0.3mm to 0.8mm. For example, in some specific embodiments, it can be set to 0.3mm, 0.5mm, or 0.8mm respectively. This radius range also reduces the foreign body sensation in the patient's mouth, which helps improve patient comfort. For example, as... Figure 7 As shown, the cross-section of the first guiding member 7 is semi-circular, the crown height r1 is the radius of the circle containing the semi-circle, the chord length R1 is the diameter of the circle containing the semi-circle, and the ratio of the crown height to the chord length r1 / R1 is 1 / 2; of course, in another specific embodiment, the ratio of the crown height to the chord length r1 / R1 can also be 1 / 3, 1 / 4, 1 / 5, or other ratios between 1 / 5 and 1 / 2.

[0045] In other embodiments, the outer contour of the first guide member 7 is an ellipsoidal crown shape. Similar to a spherical crown, the larger the ratio r² / R² of the crown height to the major axis of the base ellipse, the smaller the frictional resistance during line contact sliding, but the lower the stability during sliding. Conversely, the smaller the ratio r² / R², the greater the stability during line contact sliding, but the greater the frictional resistance during sliding. In this application, the ratio r² / R² of the crown height to the major axis of the base ellipse ranges from 1 / 5 to 1 / 2. Considering the limited surface area of ​​the first guide surface 32, the major axis of the base ellipse ranges from 0.6mm to 1.6mm. For example, in some specific embodiments, it can be set to 0.6mm, 1.0mm, or 1.6mm respectively. This range of the major axis of the base ellipse also reduces the foreign body sensation in the patient's mouth, thus improving patient comfort. For example, as... Figure 8 As shown, the cross-section of the first guiding member 7 is semi-elliptical. The crown height r2 of the ellipsoidal crown is the minor axis radius of the ellipse containing the semi-ellipse. The major axis of the base ellipse is indicated by R2. The ratio of the crown height to the major axis of the base ellipse, r2 / R2, is less than 1 / 2. Of course, in another specific embodiment, the ratio of the crown height to the chord length, r2 / R2, can also be 1 / 3, 1 / 4, or 1 / 5.

[0046] In some other embodiments, the outer contour of the first guide member 7 is a triangular prism shape, such as... Figure 9As shown, the cross-section of the triangular prism is an isosceles triangle, and the included angle α between the two isosceles sides of the isosceles triangle satisfies: 60°≤α≤160°. For example, in some specific embodiments, it can be set to 60°, 100°, or 160° respectively. By setting the isosceles triangle, balance and stability are ensured during the sliding process. With such an angle setting, both sliding stability during the sliding process and locking stability after sliding to the target position can be taken into account.

[0047] To further explain, when the first guide member 7 is disposed on the first protrusion 3, the first guide member 7, the first guide member 5, and the first protrusion 3 are formed by 3D printing. This arrangement allows for a 3D-printed integral structure, ensuring reliable connections between structural components and eliminating the risk of detachment. Alternatively, separate components can be 3D printed and then assembled using bonding or laser welding. 3D printing improves manufacturing precision and facilitates personalized customization. The shell-shaped dental instrument 100 can be obtained by 3D printing using materials that meet strength requirements, and can also be printed as a hollow or solid first guide member 7 structure as needed. It is understood that the first shell-shaped body 1 and the second shell-shaped body 2 can be formed by hot pressing film process to meet the mechanical performance requirements of the first shell-shaped body 1 and the second shell-shaped body 2. The first guide member 7 can be obtained by 3D printing and then assembled onto the shell-shaped body by bonding or laser welding. In this way, the mechanical performance of the first shell-shaped body 1 and the second shell-shaped body 2 as well as the strength requirements of the first guide member 7 can be met, making the shell-shaped dental instrument 100 stable and reliable in use. Example

[0048] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to [reference needed]. Figure 10 and Figure 11 As shown. The difference between this embodiment and Embodiment 1 is that the positions of the guide protrusion and the guide recess are different. In this embodiment, the guide protrusion protrudes from the second guide plane 41, and the guide recess is recessed on the first guide plane 31 at a position corresponding to the guide protrusion; the first guide member 7 is disposed on the guide protrusion located on the second guide plane 41.

[0049] Furthermore, when the first guide member 7 is disposed on the second protrusion 4, the first guide member 7 and the second protrusion 4 are formed by 3D printing. This arrangement allows for the integral fabrication of the first guide member 7 and the second protrusion 4 through 3D printing, ensuring a reliable connection between the structural components and eliminating the risk of detachment. Alternatively, the individual components can be 3D printed and then assembled together using methods such as bonding or laser welding. 3D printing improves manufacturing precision, and the modular design facilitates personalized customization. Overall, 3D printing allows for the selection of materials that meet strength requirements to obtain the shell-shaped dental instrument 100, and, as needed, can also print the first guide member 7 as a hollow or solid structure. It is understood that the first shell-shaped body 1 and the second shell-shaped body 2 can be formed by hot pressing film process to meet the mechanical performance requirements of the first shell-shaped body 1 and the second shell-shaped body 2. The first guide member 7 can be obtained by 3D printing and then assembled onto the shell-shaped body by bonding or laser welding. In this way, the mechanical performance of the first shell-shaped body 1 and the second shell-shaped body 2 as well as the strength requirements of the first guide member 7 can be met, making the shell-shaped dental instrument 100 stable and reliable in use.

[0050] Other technical features of this embodiment are the same as those of Embodiment 1. They can be used in conjunction with the technical features of this embodiment without conflict with this embodiment, and will not be described again here. Example

[0051] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to [reference needed]. Figure 12 and Figure 13 As shown. The difference between this embodiment and Embodiment 1 is that the first guide member 7 is positioned differently. In this embodiment, the first guide member 7 is disposed on the guide recess. Specifically, at least one first guide member 7 protrudes from the inner surface of the guide recess. In this embodiment, the guide recess is a second guide member disposed on the second guide plane 41.

[0052] The placement of the first guiding member 7 is further explained. It should be noted that it includes a buccal side facing the cheek and a lingual side facing the tongue, as well as a bottom surface disposed between the buccal side and the lingual side. In a specific embodiment, please refer to [reference needed]. Figure 12As shown, the first guiding member 7 is only disposed on the bottom surface 61 of the guiding recess; preferably, the first guiding member 7 is disposed at the middle position of the bottom surface 61 along the buccal-lingual direction, which can ensure the balanced force in the buccal-lingual direction, avoid deviation during sliding, and facilitate precise guidance of the relative sliding between the first and second protrusions 4. It can be understood that multiple first guiding members 7 can also be disposed on the bottom surface, which can achieve more stable line contact sliding. Preferably, when multiple first guiding members 7 are disposed on the bottom surface, the multiple first guiding members 7 can be evenly distributed on the bottom surface along the buccal-lingual direction, that is, the distance between adjacent first guiding members 7 is consistent. In this way, the buccal-lingual balance during force sliding can be ensured, which is conducive to guiding the relative sliding between the first and second protrusions 4 without deviation, achieving precise guidance, and facilitating the achievement of the correction goal.

[0053] In another specific implementation, please refer to [reference needed]. Figure 13 As shown, the first guide member 7 is disposed on the bottom surface, the tongue-side side surface, and the cheek-side side surface of the guide recess, respectively, and slides in contact with the corresponding position lines of the guide recess. Preferably, when the first guide member 7 is disposed on both the cheek-side side surface and the tongue-side side surface of the guide recess, the first guide member 7 disposed on the cheek-side side surface and the first guide member 7 disposed on the tongue-side side surface are symmetrically disposed about the center line L2 of the guide recess on the cheek-side side surface and the tongue-side side surface of the guide recess. This symmetrical arrangement of the first guide members 7 can ensure balanced force in the cheek and tongue directions, avoid deflection during sliding, and facilitate precise guidance of the two protrusions.

[0054] In some specific embodiments, the first guiding member 7 may be disposed only on the buccal side surface of the guiding recess; or it may be disposed only on the lingual side surface of the guiding recess. It is understood that when multiple first guiding members 7 are disposed on the buccal side surface of the guiding recess, the multiple first guiding members 7 may be evenly spaced along the buccal-lingual direction on the buccal side surface, that is, the distance between adjacent first guiding members 7 is consistent; similarly, when multiple first guiding members 7 are disposed on the lingual side surface of the guiding recess, the multiple first guiding members 7 may be evenly spaced along the buccal-lingual direction on the lingual side surface, that is, the distance between adjacent first guiding members 7 is consistent; thus, buccal-lingual balance during sliding under force can be ensured, which is beneficial for guiding the relative sliding between the first and second protrusions 4 without deviation, achieving precise guidance, and facilitating the achievement of the correction goal.

[0055] Other technical features of this embodiment are the same as those of Embodiment 1. They can be used in conjunction with the technical features of this embodiment without conflict with this embodiment, and will not be described again here. Example

[0056] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to... Figure 14 and Figure 15 As shown, the similarity between this embodiment and embodiment three is that the first guide member 7 is disposed on the guide recess, specifically, at least one first guide member 7 is protruding from the inner surface of the guide recess; the difference is that in embodiment three, the guide recess is a second guide member disposed on the second guide plane 41; in this embodiment, the guide recess is a first guide member disposed on the first guide plane 31.

[0057] Other technical features of this embodiment are the same as those of Embodiment 3. They can be used in conjunction with the technical features of this embodiment without conflict with this embodiment, and will not be described again here.

[0058] It is understood that, according to embodiments one to four, the positions of the guide protrusion, the guide recess, and the first guide member can be designed according to requirements, making them flexible and adaptable in application and suitable for widespread promotion in this field. Example

[0059] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to... Figures 16 to 20 As shown, based on the above embodiments one to four, a first retention portion 33 can be further provided on the first occlusal surface 32 of the first protrusion 3 facing the mandible, and a second retention portion 21 corresponding to the position of the first retention portion 33 on the mandibular occlusal surface of the second shell-shaped body 2 is provided, which matches the concave and convex shape of the first retention portion 33. At the target position, the first retention portion 33 and the second retention portion 21 match the concave and convex shape to stabilize the first shell-shaped body 1 and the second shell-shaped body 2 at the target position. In one embodiment, as shown... Figure 16 As shown, the first retention part 33 is a convex part protruding towards the occlusal surface of the mandible, and the second retention part 21 is a concave part that matches the convex part. The concave-convex matching structure enhances stability and ensures that the relative positional relationship between the first shell-shaped body 1 and the second shell-shaped body 2 of the upper and lower jaws can be maintained at the target position, avoiding displacement or other situations that are detrimental to jaw stability.

[0060] When the second retention portion 21 is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, enhancing its resistance to deformation and reducing the probability of the recess being damaged or flattened, thus extending the service life of the shell-shaped dental instrument 100. It is understood that this should be considered in conjunction with... Figure 17 and Figure 18 As shown, the bottom surface of the concave portion is located at a predetermined height h above the occlusal surface of the tooth containing the concave portion. For example, if the tooth containing the concave portion does not have the conditions to support the concave portion, such a scheme of setting at a predetermined height h can also be adopted. This flexible setting can be selected according to the actual situation of the patient in clinical practice, and has wider applicability.

[0061] In another embodiment, such as Figure 19 As shown, the first retention portion 33 is a recess formed by a portion of the surface of the first occlusal surface 32 recessed inward toward the primary tooth, and the second retention portion 21 is a convex portion that matches the recess. This arrangement increases the possibility of flexible selection in clinical practice based on the patient's condition.

[0062] In yet another implementation, such as Figure 20 As shown, the second retention part 21 can be configured as an anatomical structure with a consistent occlusal surface contour of the tooth it covers. Correspondingly, the first retention part 33 can also be configured as a concave-convex structure that matches the concave-convex shape of the second retention part 21. The locking effect of the first retention part 33 and the second retention part 21 formed therefrom is better, which is sufficient to stabilize the patient's upper and lower jaws at the target position, which is conducive to the achievement of the orthodontic goal.

[0063] To further explain, in addition to providing a first retention portion 33 on the first protrusion 3, this application may also provide a third retention portion 43 on the second occlusal surface 42 of the second protrusion 4 facing the maxilla. The first shell-shaped body 1 is provided with a fourth retention portion 11 on the maxillary occlusal surface corresponding to the position of the third retention portion 43, which matches the concave and convex shape of the third retention portion 43. At the target position, the third retention portion 43 and the fourth retention portion 11 match the concave and convex shape to stabilize the first shell-shaped body 1 and the second shell-shaped body 2 at the target position. The third retention portion 43 is a protrusion that protrudes towards the maxillary occlusal surface, and the fourth retention portion 11 is a concave portion that matches the protrusion. Alternatively, the third retention portion 43 is a concave portion formed by a portion of the surface of the second occlusal surface 42 concave in the direction towards the main tooth, and the fourth retention portion 11 is a protrusion that matches the concave portion. Furthermore, when the fourth retention portion 11 is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, or the bottom surface of the recess is located at a predetermined height above the occlusal surface of the tooth where the recess is located. The structure, location, and mating relationship of the third retention portion 43 and the fourth retention portion 11 are generally consistent with the structure, location, and mating relationship of the first retention portion 33 and the second retention portion 21; to save space in this specification, they will not be described in detail here.

[0064] It is understandable that a first retaining part 33 can be provided on the first protrusion 3, while a third retaining part 43 can also be provided on the second protrusion 4; or a first retaining part 33 can be provided only on the first protrusion; or a third retaining part 43 can be provided only on the second protrusion 4. These technical solutions all have certain significance in clinical practice and can be flexibly selected according to clinical needs.

[0065] The technical features of this embodiment can be used in combination with those of embodiments one to four above, provided that they do not conflict with them, and will not be described in detail here. Example

[0066] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to... Figure 21 and Figure 22 As shown, based on the above embodiments one to five, the following settings can also be added: It should be noted that the first guide plane 31 includes a first main guide surface and a first auxiliary guide surface. The first main guide surface is the outer surface of the guide protrusion or the inner surface of the guide concave part. The first auxiliary guide surface is the plane on the first guide plane 31 other than the first main guide surface. A plurality of second guide members 8 are also protruding from the first auxiliary guide surface in a direction away from the first auxiliary guide surface. When the first guide plane 31 and the second guide plane 41 slide relative to each other, the second guide members 8 slide relative to the second guide plane 41 in a line contact manner. By also providing second guide members 8 with a line contact structure on the first auxiliary guide surface, that is, in addition to the first guide member 5 and the second guide member 6 sliding in a line contact manner, the surface contact other than the first guide member 5 and the second guide member 6 is also set to be line contact through the second guide members 8. This further improves the smoothness and stability during relative sliding. When the first guide member 7 is disposed on the first auxiliary guide surface, the first guide member 7 is disposed along the vertical direction of the first auxiliary guide surface (parallel to the vertical direction Z of the first guide plane 31).

[0067] The structure and contour shape of the second guide member 8 can be similar to those of the first guide member 7, but the dimensions of the second guide member 8 and the first guide member 7 must satisfy the following: the height of the protrusion of the second guide member 8 is equal to the difference between the sum of the protrusion heights of the guide protrusion and the first guide member 7 and the recess depth of the guide concave member. That is, all the first guide members 7 and all the second guide members 8 need to be in line contact with their corresponding surfaces. This ensures that the first and second guide planes 41 can slide smoothly and in a balanced manner during relative sliding. In other words, it ensures that the first and second guide planes 41 can slide smoothly due to the reduced contact area (from surface contact to line contact) and slide in a balanced and stable manner during relative sliding, thereby ensuring that the mandible is guided forward to the target position without deviation, which is conducive to the achievement of the orthodontic goal. Example

[0068] To achieve the purpose of this invention, this application also provides a shell-shaped dental instrument 100 for adjusting jaw position, please refer to... Figure 23 and Figure 24 As shown, based on the above embodiments one to five, the following settings can also be added: Further explanation: the second guide plane 41 includes a second main guide surface and a second auxiliary guide surface. The second main guide surface is the outer surface of the guide protrusion or the inner surface of the guide concave part. The second auxiliary guide surface is a plane on the second guide plane 41 other than the second main guide surface. A plurality of second guide members 8 are also protruding from the second auxiliary guide surface in a direction away from the second auxiliary guide surface. When the first guide plane 31 and the second guide plane 41 slide relative to each other, the second guide members 8 slide relative to the first guide plane 31 in a line contact manner. By also providing second guide members 8 with a line contact structure on the second auxiliary guide surface, that is, in addition to the first guide member 5 and the second guide member 6 sliding in a line contact manner, the surface contact other than the first guide member 5 and the second guide member 6 is also set to be line contact through the second guide members 8. This further improves the smoothness and stability during relative sliding.

[0069] Furthermore, when the second guide member 8 is disposed on the second auxiliary guide surface, the second guide member 8 is disposed along the vertical direction of the second auxiliary guide surface (parallel to the vertical direction Z of the first guide plane 31).

[0070] It should be noted that the "second guide component" in this embodiment and the second guide component in embodiment six are the same in all other technical features except for the different setting positions, and will not be described in detail here.

[0071] It should be noted that the above embodiments can be freely combined as needed to form different new implementation schemes without causing contradictions. All implementation schemes formed by such combinations are within the protection scope of this application. In order to save space in the application text, they will not be described in detail here.

[0072] The above description is only a preferred embodiment of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the inventive principle of this invention, and these improvements and modifications should also be considered within the scope of protection of this application.

[0073] Similarly, the above descriptions are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A shell-shaped dental instrument for adjusting jaw position, comprising a first shell-shaped body accommodating multiple maxillary teeth of a patient, and a second shell-shaped body accommodating multiple mandibular teeth of a patient, wherein the first shell-shaped body has a first protrusion protruding downward in the mandibular direction in the posterior tooth region, and the second shell-shaped body has a second protrusion protruding upward in the mandibular direction in the posterior tooth region, wherein a first guiding plane interacting with the second protrusion is provided on the mesial side of the first protrusion, the first guiding plane being inclined downward and distally arranged from the mesial tooth end to the distal tooth end, and a second guiding plane interacting with the first guiding plane is provided on the distal side of the second protrusion, the first guiding plane and the second guiding plane being parallel to each other, characterized in that... A first guide member is provided through the first guide plane along the vertical direction of the first guide plane, and a second guide member is provided through the second guide plane along the vertical direction of the second guide plane. The first guide member and the second guide member are a set of interacting guide protrusions and guide recesses. Wherein, the guide protrusion is protruding on the first guide plane, and the guide recess is recessed on the second guide plane at a position corresponding to the guide protrusion; or, the guide protrusion is protruding on the second guide plane, and the guide recess is recessed on the first guide plane at a position corresponding to the guide protrusion. At least one first guiding member is provided protruding from the outer surface of the guiding protrusion or the inner surface of the guiding concave. The first guiding member enables the guiding protrusion and the guiding concave to slide relative to each other in a line contact manner, so as to drive the first guiding plane and the second guiding plane to move relative to each other, guiding the mandible to move forward in a sagittal direction to the target position. At the target position, the first occlusal surface of the first protrusion contacts the occlusal surface at the corresponding position of the second shell-shaped body, and the second occlusal surface of the second protrusion contacts the occlusal surface at the corresponding position of the first shell-shaped body.

2. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, The guide protrusion includes a cheek-side side surface facing the cheek side and a tongue-side side surface facing the tongue side, as well as a top surface disposed between the cheek-side side surface and the tongue-side side surface. The first guiding member is disposed on the top surface of the guiding protrusion, and / or the first guiding member is disposed on the cheek-side side surface or the tongue-side side surface of the guiding protrusion; Alternatively, the first guiding member may be disposed on the top surface of the guiding protrusion, the tongue-side side surface, and the cheek-side side surface.

3. The shell-shaped dental instrument for adjusting jaw position according to claim 2, characterized in that, When the top surface of the guide protrusion is provided with the first guide member, the first guide member is located at the middle position of the top surface along the buccal-lingual direction; when the buccal side surface and lingual side surface of the guide protrusion are provided with the first guide member at the same time, the first guide member is symmetrically arranged on the buccal side surface and lingual side surface of the guide protrusion.

4. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, The guiding recess includes a buccal side facing the cheek and a lingual side facing the tongue, and a bottom surface disposed between the buccal side and the lingual side; the first guiding member is disposed on the bottom surface of the guiding recess, and / or, the first guiding member is disposed on the buccal side or the lingual side of the guiding recess; or, the first guiding member is disposed on the bottom surface, the lingual side, and the buccal side of the guiding recess.

5. The shell-shaped dental instrument for adjusting jaw position according to claim 4, characterized in that, When the bottom surface of the guide recess is provided with the first guide member, the first guide member is located at the middle position of the bottom surface along the cheek-tongue direction; when the cheek side and tongue side of the guide recess are provided with the first guide member at the same time, the first guide member is symmetrically arranged on the cheek side and tongue side of the guide recess.

6. The shell-shaped dental instrument for adjusting jaw position according to any one of claims 1 to 5, characterized in that, The outer contour shape of the guide protrusion is consistent with the inner contour shape of the guide concave part, and the cross-sections of the guide protrusion and the guide concave part are both rectangular or arc-shaped.

7. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, The outer contour shape of the first guiding component is spherical, ellipsoidal, or triangular prism.

8. The shell-shaped dental instrument for adjusting jaw position according to claim 7, characterized in that, The outer contour of the first guiding member is spherical, the ratio of the crown height to the chord length of the spherical crown is in the range of 1 / 5 to 1 / 2, and the radius of the sphere of the spherical crown is in the range of 0.5mm to 0.8mm; or, The outer contour of the first guiding component is an ellipsoidal crown shape, wherein the ratio of the crown height to the major axis of the base ellipse ranges from 1 / 5 to 1 / 2, and the major axis of the base ellipse ranges from 1 mm to 1.6 mm; or, The outer contour of the first guiding component is a triangular prism, and the cross-section of the triangular prism is an isosceles triangle. The included angle α between the two isosceles sides of the isosceles triangle satisfies: 60°≤α≤160°.

9. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, When the first guide member is disposed on the first protrusion, the first guide member and the first protrusion are formed by 3D printing; or, when the first guide member is disposed on the second protrusion, the first guide member and the second protrusion are formed by 3D printing.

10. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, A first retention portion is provided on the first occlusal surface of the first protrusion facing the mandible. A second shell-shaped body is provided on the mandibular occlusal surface corresponding to the position of the first retention portion, and a second retention portion is provided that matches the concavity and convexity of the first retention portion. At the target position, the first retention portion and the second retention portion match the concavity and convexity to stabilize the first shell-shaped body and the second shell-shaped body at the target position. The first retention portion is a protrusion that protrudes towards the mandibular occlusal surface, and the second retention portion is a concave portion that matches the protrusion. Alternatively, the first retention portion is a concave portion formed by a portion of the surface of the first occlusal surface concave in the direction toward the main tooth, and the second retention portion is a protrusion that matches the concave portion.

11. The shell-shaped dental instrument for adjusting jaw position according to claim 10, characterized in that, When the second retaining portion is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, or the bottom surface of the recess is located at a predetermined height above the occlusal surface of the tooth where the recess is located.

12. The shell-shaped dental instrument for adjusting jaw position according to claim 1 or 10, characterized in that, A third retention portion is provided on the second occlusal surface of the second protrusion facing the maxilla. A fourth retention portion matching the third retention portion is provided on the maxillary occlusal surface of the first shell-shaped body at the position of the third retention portion. At the target position, the third retention portion and the fourth retention portion match to stabilize the first shell-shaped body and the second shell-shaped body at the target position. The third retention portion is a protrusion protruding towards the maxillary occlusal surface, and the fourth retention portion is a concave portion matching the protrusion. Alternatively, the third retention portion is a concave portion formed by a portion of the second occlusal surface recessed inward toward the main tooth, and the fourth retention portion is a protrusion matching the concave portion.

13. The shell-shaped dental instrument for adjusting jaw position according to claim 12, characterized in that, When the fourth retaining portion is a recess that matches the protrusion, the bottom surface of the recess is supported on the occlusal surface of the tooth where the recess is located, or the bottom surface of the recess is located at a predetermined height above the occlusal surface of the tooth where the recess is located.

14. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, The first guide plane includes a first main guide surface and a first auxiliary guide surface. The first main guide surface is the outer surface of the guide protrusion or the inner surface of the guide concave part. The first auxiliary guide surface is a plane on the first guide plane other than the first main guide surface. A plurality of second guide members are also provided protruding on the first auxiliary guide surface in a direction away from the first auxiliary guide surface. When the first guide plane and the second guide plane slide relative to each other, the second guide members slide relative to the second guide plane in a line contact manner.

15. The shell-shaped dental instrument for adjusting jaw position according to claim 14, characterized in that, When the first guiding member is disposed on the first auxiliary guiding surface, the first guiding member is disposed along the vertical direction of the first auxiliary guiding surface.

16. The shell-shaped dental instrument for adjusting jaw position according to claim 1, characterized in that, The second guide plane includes a second main guide surface and a second auxiliary guide surface. The second main guide surface is the outer surface of the guide protrusion or the inner surface of the guide concave part. The second auxiliary guide surface is a plane on the second guide plane other than the second main guide surface. A plurality of second guide members are also provided protruding on the second auxiliary guide surface in a direction away from the second auxiliary guide surface. When the first guide plane and the second guide plane slide relative to each other, the second guide members slide relative to the first guide plane in a line contact manner.

17. The shell-shaped dental instrument for adjusting jaw position according to claim 16, characterized in that, When the second guide member is disposed on the second auxiliary guide surface, the second guide member is disposed along the vertical direction of the second auxiliary guide surface.

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