Dental instrument

Abstract

The utility model discloses dental instrument, including first shell body and convex setting in the first shell body rear tooth area side surface first protruding part, and second shell body and convex setting in the second shell body rear tooth area side surface second protruding part, first protruding part convex setting in the first shell body rear tooth area buccal side and / or lingual side, and first protruding part includes first bottom and the first occlusal surface of inclination setting, second protruding part convex setting in the second shell body rear tooth area buccal side and / or lingual side, and second protruding part includes second bottom and the second occlusal surface of inclination setting, when wearing dental instrument, the first occlusal surface and the second occlusal surface can occlusal contact and interact, and the second occlusal surface slides along the first occlusal surface, and the second shell body is moved in the shape of losing to the first shell body upwards, and when reaching the stable occlusion state, the relative position of the upper and lower jaw of patient is adjusted to the target position, and the first occlusal surface and the second occlusal surface are parallel to each other.

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 dental instrument that can adjust the relative positional relationship between the upper and lower jaws. 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. Malocclusions 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.

[0003] Shell-shaped orthodontic appliances are devices used to treat malocclusion. They are made of safe, elastic, and transparent polymer materials, allowing the treatment process to be completed almost imperceptibly to others. For malocclusion cases involving sagittal jaw position factors, jaw position reconstruction devices are needed to correct the jaw position, achieving mandibular anterior or posterior guidance.

[0004] Existing jaw alignment reconstruction devices include the HB (Handbone), which uses upper and lower protrusions on the buccal side of a shell-shaped orthodontic appliance to position the upper and lower jaws at a target position in the sagittal direction, thereby adjusting the relative position of the upper and lower jaws. In a dental instrument for adjusting the position of the upper and lower jaws provided in Chinese Patent No. CN201922484383.5, a protrusion protruding towards the opposing jaw is provided on the buccal side of the maxillary shell-shaped body, and a limiting part is provided on the buccal side of the mandibular shell-shaped body. During wear, the mesial surface of the protrusion and the distal surface of the limiting part interact to adjust the position of the upper and lower jaws. However, when wearing the appliance, the patient needs to guide the mandible forward or backward to the target position in the sagittal direction in one step so that the protrusion and limiting part can interact. This may cause discomfort to the patient, leading to decreased patient compliance and ultimately affecting the treatment effect and progress.

[0005] Therefore, it is of great significance to study a dental instrument that is simple in structure, comfortable to wear, and capable of adjusting the relative position of the upper and lower jaws. Utility Model Content

[0006] The technical problem solved by this invention is to overcome the defects of the existing technology and provide a dental instrument with a simple structure and comfortable wear that can adjust the relative position of the upper and lower jaws.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A dental instrument includes: a first shell-shaped body for receiving a patient's maxillary teeth and a first protrusion protruding from the posterior tooth region side of the first shell-shaped body; and a second shell-shaped body for receiving a patient's mandibular teeth and a second protrusion protruding from the posterior tooth region side of the second shell-shaped body.

[0009] The first protrusion protrudes from the lateral surface of the posterior tooth region of the first shell-shaped body. The first protrusion includes a first occlusal surface facing the opposing side and a first bottom surface away from the opposing side. The length direction of the first protrusion is arranged along the mesiodistal direction of the tooth covered by the first protrusion. The first protrusion protrudes from the buccal-lingual direction towards the distal tooth and from the gingival-occlusal direction towards the opposing tooth. The first bottom surface is set at a first height with the patient's occlusal plane in the gingival-occlusal direction. The first occlusal surface is an inclined plane that is inclined along the mesiodistal direction. The distal end of the first occlusal surface is set at a second height with the distal end of the first bottom surface in the gingival-occlusal direction. The mesial end of the first occlusal surface is set at a third height with the mesial end of the first bottom surface in the gingival-occlusal direction.

[0010] The second protrusion protrudes from the lateral surface of the second shell-shaped body in the posterior tooth region corresponding to the position of the first protrusion. The second protrusion includes a second occlusal surface facing the opposing side and a second bottom surface away from the opposing side. The length direction of the second protrusion is along the mesiodistal direction of the tooth covered by the second protrusion. The second protrusion protrudes in the buccal-lingual direction and distally, and in the gingival-occlusal direction and opposing direction. The second bottom surface is at a fourth height with the patient's occlusal plane in the gingival-occlusal direction. The second occlusal surface is an inclined plane inclined in the mesiodistal direction. The distal end of the second occlusal surface is at a fifth height with the distal end of the second bottom surface in the gingival-occlusal direction. The mesial end of the second occlusal surface is at a sixth height with the mesial end of the second bottom surface in the gingival-occlusal direction.

[0011] The effective height of the first protrusion and the second protrusion in the gingival-maxillary direction is the sum of the second height and the fifth height, or the sum of the third height and the sixth height; wherein,

[0012] The effective height of the first protrusion and the second protrusion in the gingival-maxillary direction is greater than or equal to the sum of the first height and the fourth height, so that when the dental instrument is worn, the first occlusal surface and the second occlusal surface can make occlusal contact and interact with each other, the second occlusal surface slides along the first occlusal surface, and the second shell-shaped body moves relative to the first shell-shaped body in an upward occlusal direction. When the occlusal state is stable, the relative position of the patient's upper and lower jaws is adjusted to the target position, and the first occlusal surface and the second occlusal surface are parallel to each other.

[0013] With this design, during the wearing process, the first and second occlusal surfaces can be gradually fitted into place in the mouth under the action of "chewing force". When the chewing force acts on the inclined first and second occlusal surfaces, it forms a sagittal component force. This component force can drive the mandible to move slowly in the sagittal direction during the slow biting process, gradually guiding the relative position of the upper and lower jaws to the target position. This allows the patient to have an adaptive process. Compared with the traditional HB appliance, which is a one-step snap-on fitting treatment, the patient is more likely to adapt and cooperate, which helps to improve patient compliance and treatment efficiency. Furthermore, by setting the effective height of the first and second protrusions in the gingival-maxillary direction to be greater than or equal to the sum of the first height and the fourth height, this application not only ensures that the first and second occlusal surfaces can make contact and interact during wear, but also caters to a wider range of clinical cases. It can meet the needs of cases where the bite needs to be opened to relieve occlusal interference during the adjustment of the upper and lower jaws, thus broadening its applicability. Moreover, the first and second occlusal surfaces are arranged in parallel, ensuring that they can make stable and reliable contact and interact during wear. During parallel sliding, the force on the first and second occlusal surfaces is relatively uniform, avoiding local stress concentration problems, thereby ensuring the reliability of the dental instrument and preventing local fractures caused by stress concentration.

[0014] Preferably, the third height is less than the second height, and the height of the first occlusal surface from the first base surface in the gingival-maxillary direction gradually increases from the mesial to the distal end; and the sixth height is less than the fifth height, and the height of the second occlusal surface from the second base surface in the gingival-maxillary direction gradually decreases from the mesial to the distal end; wherein, when the first occlusal surface and the second occlusal surface interact, the second shell-like body moves forward relative to the first shell-like body in the sagittal direction, guiding the patient's mandible to move forward in the sagittal direction to the target position.

[0015] Preferably, the third height is greater than the second height, and the height of the first occlusal surface from the first base surface in the gingival-maxillary direction gradually decreases from the mesial end to the distal end; and,

[0016] The sixth height is greater than the fifth height, and the height of the second occlusal surface from the second base surface in the gingival-maxillary direction gradually increases from the mesial end to the distal end; wherein...

[0017] When the first occlusal surface and the second occlusal surface interact, the second shell-like body moves backward in the sagittal direction relative to the first shell-like body, guiding the patient's mandible to move backward in the sagittal direction to the target position.

[0018] Preferably, when the effective height of the first and second protrusions in the gingival-maxillary direction is equal to the sum of the first height and the fourth height; the first occlusal surface is lower than the occlusal plane in the gingival-maxillary direction, and the second occlusal surface exceeds the occlusal plane in the gingival-maxillary direction; or, the first occlusal surface exceeds the occlusal plane in the gingival-maxillary direction, and the second occlusal surface is lower than the occlusal plane in the gingival-maxillary direction. This configuration provides greater comfort for the patient and is suitable for cases where the patient's mandible moves forward in the sagittal direction without interfering with the maxillary dentition, i.e., there is no need to open the bite or there is no occlusal interference.

[0019] Preferably, when the effective height of the first and second protrusions in the gingival-maxillary direction is greater than the sum of the first height and the fourth height, the patient's upper and lower jaws open to a predetermined height; the first occlusal surface and / or the second occlusal surface are positioned beyond the occlusal plane in the gingival-maxillary direction. This configuration allows the effective height of the first and second protrusions to be used to eliminate occlusal interference between the patient's upper and lower jaws. That is, at this effective height setting, there is no occlusal interference between the upper and lower jaws in the patient's mouth, providing the possibility for sagittal movement of the mandible to avoid immobility due to occlusal interference.

[0020] Preferably, the first shell-shaped body and / or the second shell-shaped body are provided with a stabilizing portion protruding in the direction of occlusion. During occlusion, the patient's upper and lower jaws occlude on the stabilizing portion, which is used to compensate for the open jaw gap formed between the patient's upper and lower jaws due to the predetermined height, so as to stabilize the occlusal state.

[0021] Preferably, the open bite gap is formed in the posterior tooth region of the patient, and the stabilizing portion is disposed on the occlusal surface of at least one tooth in the posterior tooth region of the first shell-shaped body and / or the second shell-shaped body. During occlusion, the surface of the stabilizing portion facing the opposing jaw and the corresponding occlusal surface of the opposing tooth make occlusal contact. The height of the stabilizing portion protruding from the occlusal surface of the posterior tooth region of the patient can compensate for the open bite gap in the posterior tooth region. By providing the stabilizing portion to compensate for the open bite gap caused by the effective height of the first and second protrusions, the occlusion of the upper and lower jaws is made more stable.

[0022] Preferably, the open bite gap is formed in the anterior region of the patient, and the stabilizing portion is disposed on the labial or lingual surface of at least one tooth in the anterior region of the first shell-shaped body and / or the second shell-shaped body. The stabilizing portion includes a stabilizing surface that contacts the incisal edge of the opposing anterior tooth, wherein the labial or lingual width of the stabilizing surface satisfies the following: the incisal edge of the opposing tooth can occlude on the stabilizing surface, and the height of the stabilizing portion protruding from the incisal edge of the anterior tooth can compensate for the open bite gap in the anterior region.

[0023] Preferably, the end of the first protrusion is provided with a limiting portion toward the opposing jaw. When the patient wears the dental instrument to a stable occlusal state, the limiting portion restricts the second occlusal surface from continuing to move along the first occlusal surface in the sagittal direction. By providing the limiting portion, the sliding of the second occlusal surface after reaching the target position can be restricted. On the one hand, this avoids the mandible being excessively guided forward or backward; on the other hand, it allows the second occlusal surface to remain stable in the target position after reaching it, which is beneficial for achieving the orthodontic goal.

[0024] Preferably, the limiting portion extends from the end of the first occlusal surface on the first protrusion, where the height from the occlusal plane upwards is smaller, toward the opposing jaw. The limiting portion has a limiting surface on the side facing the opposing jaw. The angle between the limiting surface and the first occlusal surface is greater than or equal to the angle between the second occlusal surface and the side of the second protrusion at the end with the greater height from the occlusal plane upwards, and is less than 180°. By setting this range of angles, the angle between the limiting surface and the first occlusal surface can be specifically selected according to the patient's specific situation, thus allowing for selection of the limiting portion's configuration and providing multiple options for clinical selection.

[0025] Preferably, the first occlusal surface and the first base surface are set at an angle of 15°-55°, and the second occlusal surface and the second base surface are set at an angle of 15°-55°. This range of angle settings allows for the selection of the angles of the first and second occlusal surfaces according to the patient's specific condition, providing multiple options suitable for widespread application.

[0026] Preferably, the first protrusion and the second protrusion cover the side of at least one tooth in their corresponding posterior region in a mesiodistal orientation.

[0027] Preferably, the width of both the first and second occlusal surfaces along the buccal-lingual direction is 3mm-8mm. This range of buccal-lingual width ensures sufficient contact area between the first and second occlusal surfaces without causing a significant foreign body sensation. This symmetrical arrangement about the dental midline allows for a more balanced force distribution on both sides of the patient, providing comfort and further ensuring stability during occlusal contact between the first and second occlusal surfaces, preventing misalignment.

[0028] Preferably, there are two first protrusions, symmetrically arranged about the tooth midline on the buccal surfaces of the left and right sides of the posterior tooth region of the first shell-shaped body; there are two second protrusions, each protruding from the buccal surface of the posterior tooth region of the second shell-shaped body at the position corresponding to the first protrusion; and / or,

[0029] There are two first protrusions, which are symmetrically arranged on the lingual surfaces of the left and right sides of the posterior tooth region of the first shell-shaped body about the tooth midline; there are two second protrusions, which are respectively protruding and arranged on the lingual surfaces of the posterior tooth region of the second shell-shaped body at the positions corresponding to the first protrusions.

[0030] Preferably, when the first protrusion and the second protrusion are respectively disposed on the tongue side of the first shell-shaped body and the second shell-shaped body, the surface of the first protrusion and / or the second protrusion near the tongue body is provided with a concave structure to avoid the tongue body. The concave structure is formed by the surface of the first protrusion and / or the second protrusion near the tongue body concave inward to the side away from the tongue body. The concave structure encloses and forms a tongue body accommodating space. The tongue body accommodating space penetrates the proximal and distal surfaces of the first protrusion and / or the second protrusion.

[0031] Preferably, the concave surface of the concave structure at least covers the surface of the first protrusion near the tongue or the second protrusion near the tongue corresponding to the position of the patient's tongue.

[0032] Preferably, the surface of the concave structure is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction; and / or, the surface of the first protrusion and / or the second protrusion near the tongue body, excluding the concave structure, is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction.

[0033] Preferably, at least one side surface of the first protrusion and / or the second protrusion is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction. By providing reinforcing ridges, the deformation resistance of the first and second protrusions can be ensured, and deformation (such as being crushed) can be avoided during occlusal contact, thereby ensuring the therapeutic effect of the dental instrument.

[0034] Preferably, when the first protrusion and the second protrusion are respectively disposed on the cheek side of the first shell-shaped body and the second shell-shaped body, the surface of the first protrusion and the second protrusion on the cheek side is configured as a smooth arc shape that conforms to the shape of the patient's cheek muscle. This configuration allows the shape of the cheek side surface of the first protrusion and the second protrusion to well conform to the patient's cheek muscle, enhancing comfort, increasing willingness to wear, and facilitating the achievement of corrective effects.

[0035] Preferably, the first protrusion and the first shell-shaped body are separate components. The side of the posterior tooth region of the first shell-shaped body protrudes distally to form a first mounting platform. The surface of the first mounting platform facing the opposing jaw protrudes toward the opposing jaw or is recessed toward the jaw to form a first positioning structure. The first bottom surface of the first protrusion forms a second positioning structure that matches the first positioning structure. The first protrusion is positioned and bonded to the first mounting platform by matching the first positioning structure and the second positioning structure. Alternatively, the second protrusion and the second shell-shaped body are separate components. The side of the posterior tooth region of the second shell-shaped body protrudes distally to form a second mounting platform. The surface of the second mounting platform facing the opposing jaw protrudes toward the opposing jaw or is recessed toward the jaw to form a third positioning structure. The second bottom surface of the second protrusion forms a fourth positioning structure that matches the third positioning structure. The second protrusion is positioned and bonded to the second mounting platform by matching the third positioning structure and the fourth positioning structure. This split structure provides greater flexibility in material selection for the first and second protrusions; moreover, the split structure does not damage the structure of the first and second shell-like bodies, thus not affecting their wrapping force and ultimately not affecting the orthodontic effect.

[0036] Preferably, the cross-section of the first positioning structure has a non-axisymmetric geometry, so that the first positioning structure and the second positioning structure can be positioned in a uniquely predetermined manner; the cross-section of the third positioning structure has a non-axisymmetric geometry, so that the third positioning structure and the fourth positioning structure can be positioned in a uniquely predetermined manner; or,

[0037] The system comprises multiple first positioning structures, which together form a non-axisymmetric geometric structure, enabling the first and second positioning structures to mate and position themselves in a uniquely predetermined manner. Similarly, the system comprises multiple third positioning structures, which together form a non-axisymmetric geometric structure, enabling the third and fourth positioning structures to mate and position themselves in a uniquely predetermined manner. This uniquely predetermined positioning method allows for rapid positioning and installation.

[0038] Preferably, the material stiffness of the first protrusion and the second protrusion is greater than that of the first shell-shaped body and the second shell-shaped body. This stiffness setting increases the stability and reliability of the first protrusion and the second protrusion during occlusion, making them less prone to deformation and thus not affecting the orthodontic process.

[0039] Preferably, the first protrusion and / or the second protrusion are prefabricated parts made of ceramic or metal. This ensures rigidity, and the smooth surface of the ceramic or metal material prevents scratching of the cheek muscles or tongue when placed in the mouth, providing reliability and comfort. Attached Figure Description

[0040] 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.

[0041] Figure 1 This is a schematic diagram of the structure of a dental orthodontic instrument according to Embodiment 1 of this utility model;

[0042] Figure 2 for Figure 1 A magnified view of a portion of region A in the middle;

[0043] Figure 3 This is a partial structural schematic diagram of a dental instrument according to Embodiment 1 of this utility model;

[0044] Figure 4 This is a partial structural schematic diagram of another dental instrument in Embodiment 1 of this utility model;

[0045] Figure 5 This is a partial structural schematic diagram of another dental instrument in Embodiment 1 of this utility model;

[0046] Figure 6 for Figure 1 A magnified view of a portion of region A in the middle;

[0047] Figure 7 This is a schematic diagram of another dental orthodontic instrument in Embodiment 1 of this utility model;

[0048] Figure 8 This is a schematic diagram of the structure of another dental orthodontic instrument in Embodiment 1 of this utility model;

[0049] Figure 9 This is a schematic diagram of the structure of a dental instrument with a reinforcing ridge according to Embodiment 1 of this utility model;

[0050] Figure 10 This is a schematic diagram of another dental instrument with a reinforcing ridge in Embodiment 1 of this utility model;

[0051] Figure 11 This is a schematic diagram of the structure of a dental instrument in Embodiment 2 of this utility model;

[0052] Figure 12This is a schematic diagram of the structure of a dental instrument in Embodiment 3 of this utility model, in which the first occlusal surface extends beyond the occlusal plane;

[0053] Figure 13 This is a schematic diagram of the structure of a dental instrument in Embodiment 3 of this utility model, in which the second occlusal surface extends beyond the occlusal plane;

[0054] Figure 14 This is a schematic diagram of the structure of a dental instrument according to Embodiment 3 of this utility model;

[0055] Figure 15 This is a cross-sectional view along the sagittal plane of a dental instrument with a stabilizing part in the anterior tooth region according to Embodiment 3 of this utility model;

[0056] Figure 16 This is a cross-sectional schematic diagram along the sagittal plane of another dental instrument with a stabilizing part in the anterior tooth region, according to Embodiment 3 of this utility model.

[0057] Figure 17 This is a schematic diagram of the structure of another dental instrument in Embodiment 3 of this utility model;

[0058] Figure 18 This is a schematic diagram of the structure of another dental instrument in Embodiment 3 of this utility model;

[0059] Figure 19 This is a schematic diagram of the structure of a dental instrument in Embodiment 4 of this utility model;

[0060] Figure 20 This is a schematic diagram of the structure of another dental instrument in Embodiment 4 of this utility model;

[0061] Figure 21 This is a schematic diagram of the structure of another dental instrument in Embodiment 4 of this utility model;

[0062] Figure 22 This is a schematic diagram of the structure of another dental instrument in Embodiment 4 of this utility model;

[0063] Figure 23 This is a schematic diagram of the structure of a dental instrument in Embodiment 5 of this utility model;

[0064] Figure 24 This is a schematic diagram of the structure of a dental instrument in Embodiment Six of this utility model;

[0065] Figure 25 for Figure 24 A magnified view of a portion of region B in the middle;

[0066] Figure 26 for Figure 24 A magnified view of a portion of region C in the middle;

[0067] Figure 27 This is a cross-sectional schematic diagram of a third positioning structure in Embodiment Six of this utility model;

[0068] Figure 28 This is a cross-sectional schematic diagram of another third positioning structure in Embodiment Six of this utility model. Detailed Implementation

[0069] 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.

[0070] 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.

[0071] 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.

[0072] The following will provide a detailed explanation in conjunction with the illustrations.

[0073] Example 1

[0074] Please refer to Figure 1 and Figure 2 As shown in the illustrations of the dental instrument 100 of this application, the gap between the first occlusal surface 111 and the second occlusal surface 211 is for better illustrating the complete structure of the first protrusion 11 and the second protrusion 21, and does not indicate that the two are not in contact when worn. In fact, when wearing the dental instrument 100 of this application, there is no gap between the first occlusal surface 111 and the second occlusal surface 211, and they are in contact with each other, which will be explained in detail below.

[0075] The dental instrument 100 provided in this application includes a first shell-shaped body 1 for accommodating the patient's maxillary teeth and a first protrusion 11 protruding from the side of the posterior tooth region of the first shell-shaped body 1, and a second shell-shaped body 2 for accommodating the patient's mandibular teeth and a second protrusion 21 protruding from the side of the posterior tooth region of the second shell-shaped body 2.

[0076] The first protrusion 11 protrudes from the buccal side surface of the posterior tooth region of the first shell-shaped body 1. The first protrusion 11 includes a first occlusal surface 111 facing the opposing side and a first bottom surface 112 away from the opposing side. The length direction of the first protrusion 11 is arranged along the mesiodistal direction of the tooth covered by the first protrusion 11. The first protrusion 11 protrudes in the buccal-lingual direction and distally, and in the gingival-occlusal direction and opposing direction. The first bottom surface 112 is arranged at a first height h1 with the patient's occlusal plane in the gingival-occlusal direction. 1 is an inclined plane that is inclined along the mesial-distal direction. The distal end of the first occlusal surface 111 is set at a second height h2 with the distal end of the first bottom surface 112 in the gingival-occlusal direction. The mesial end of the first occlusal surface 111 is set at a third height h3 with the mesial end of the first bottom surface 112 in the gingival-occlusal direction. It should be noted that the occlusal plane S is a reference plane and also an imaginary plane. It refers to the imaginary plane formed by the mesial contact point of the maxillary central incisor to the mesial buccal apex of the bilateral first molars. This occlusal plane is parallel to the nasal alar-tragus line and basically bisects the intermaxillary distance.

[0077] The second protrusion 21 protrudes from the buccal side surface of the posterior tooth region of the second shell-shaped body 2. The second protrusion 21 includes a second occlusal surface 211 facing the opposing side and a second bottom surface 212 away from the opposing side. The length direction of the second protrusion 21 is arranged along the mesiodistal direction of the tooth covered by the second protrusion 21. The second protrusion 21 protrudes from the buccal-lingual direction and distally, and from the gingival-occlusal direction and opposing side. The second bottom surface 212 is arranged at a fourth height h4 with the patient's occlusal plane in the gingival-occlusal direction. The second occlusal surface 211 is a mesiodistal... The second occlusal surface 211 is inclined to an inclined plane, with its distal end at a fifth height h5 in the gingival-occlusal direction and its distal end at the second bottom surface 212, and its proximal end at a sixth height h6 in the gingival-occlusal direction and its proximal end at the second bottom surface 212; the effective height of the first protrusion 11 and the second protrusion 21 in the gingival-occlusal direction is the sum of the protrusion heights of the first protrusion 11 and the second protrusion 21 in the gingival-occlusal direction, that is, the sum of the second height h2 and the fifth height h5 or the sum of the third height h3 and the sixth height h6.

[0078] In this embodiment, the effective height of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction is equal to the sum of the first height h1 and the fourth height h4. This ensures that when the dental instrument 100 is worn, the first occlusal surface 111 and the second occlusal surface 211 can make occlusal contact and interact. The second occlusal surface 211 slides along the first occlusal surface 111, and the second shell-shaped body 2 slides relative to the first shell-shaped body 1 in the occlusal direction. When the sliding reaches a stable occlusal state, the relative position of the patient's upper and lower jaws is adjusted to the target position, and the first occlusal surface 111... The first occlusal surface 111 and the second occlusal surface 211 are parallel to each other. The parallel first occlusal surface 111 and the second occlusal surface 211 not only make the contact between the two more stable at the target position, but also ensure that the first occlusal surface 111 does not hinder the sliding of the second occlusal surface 211 during the sliding process. They can make stable and reliable occlusal contact and interact with each other. During the parallel sliding process, the force on the first occlusal surface 111 and the second occlusal surface 211 is more uniform, avoiding the problem of local stress concentration. This ensures the reliability of the dental instrument 100 and avoids the problem of local fracture caused by stress concentration.

[0079] Additionally, it should be noted that the target position can be a phased target position in a current orthodontic stage, or it can be the final target position in the patient's orthodontic cycle. For example, the target position is usually set to guide the incisal edge of the patient's mandibular anterior teeth to a position opposite to the incisal edge of the maxillary anterior teeth.

[0080] It should be noted that the first occlusal surface 111 and the second occlusal surface 211 in this application are preferably arranged as inclined planes. It can be understood that due to process reasons or a slight arc surface within a certain range of curvature variation, the inventive purpose of this application can also be achieved and is within the protection scope of this application.

[0081] In this embodiment, the third height h3 is less than the second height h2, and the height of the first occlusal surface 111 from the first bottom surface 112 in the gingival-occlusal direction gradually increases from the mesial end to the distal end, that is, the first occlusal surface 111 is inclined upward from the distal end to the mesial end; and the sixth height h6 is less than the fifth height h5, and the height of the second occlusal surface 211 from the second bottom surface 212 in the gingival-occlusal direction gradually decreases from the mesial end to the distal end, that is, the second occlusal surface 211 is inclined downward from the distal end to the mesial end. When worn, the mesial end of the second occlusal surface 211 first contacts the distal end of the first occlusal surface 111. Guided by the inclined plane of the first occlusal surface 111, the second occlusal surface 211 gradually occludes along the first occlusal surface 111 to the target position, causing the second shell-shaped body 2 to move forward relative to the first shell-shaped body 1 in the sagittal direction, thereby moving the patient's mandible forward in the sagittal direction to the target position, which is beneficial for the correction of Class II malocclusion. With this design, during the wearing process, the first and second occlusal surfaces can be gradually fitted into place in the mouth under the action of "chewing force". When the chewing force acts on the inclined first and second occlusal surfaces, it forms a sagittal component force. This component force can drive the mandible to move slowly in the sagittal direction during the slow biting process, gradually guiding the relative position of the upper and lower jaws to the target position. This provides the patient with an adaptive process. Compared with the traditional HB appliance, which is a one-step snap-on fitting method, this dental instrument can improve the discomfort caused by the one-step fitting of the traditional HB appliance, making wearing more interesting and easier to control. The patient's initiative and compliance are improved, which is conducive to achieving the orthodontic effect.

[0082] To further explain, the effective height of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction is equal to the sum of the first height h1 and the fourth height h4. In this embodiment, the first occlusal surface 111 is lower than the occlusal plane in the gingival-maxillary direction, and the second occlusal surface 211 is higher than the occlusal plane in the gingival-maxillary direction. At this time, when the patient wears the dental instrument 100, the patient's upper and lower jaws are not designed to open, and the upper and lower jaws can still bite together normally. This is suitable for cases where the patient's mandible moves forward in the sagittal direction without interfering with the maxillary dentition, that is, there is no need to open the bite and there is no occlusal interference.

[0083] Please refer to the following: Figures 3 to 5As shown, when the second occlusal surface 211 slides forward along the first occlusal surface 111 in the sagittal direction, after the bite is in place, in order to limit the second occlusal surface 211 from continuing to slide, for example, when sliding upward in the sagittal direction to the target position, if the second occlusal surface 211 continues to slide, it will cause the mandible to be excessively protruded, resulting in a reverse bite; this application provides a limiting part 14 extending towards the opposing jaw at the end of the first protrusion 11. When the patient wears the dental instrument 100 to a stable occlusal state, the limiting part 14 can limit the second occlusal surface 211 from continuing to move in the sagittal direction along the first occlusal surface 111. It should be noted that the end of the first protrusion 11 refers to the end corresponding to the second occlusal surface 211 when it slides along the first occlusal surface 111 to the target position. In this embodiment, the second occlusal surface 211 contacts the first occlusal surface 111 from the distal end of the first protrusion 11 and slides along the first occlusal surface 111 to the proximal end of the first protrusion 11. That is, the end of the first protrusion 11 refers to the proximal end of the first protrusion 11.

[0084] Further explanation: The limiting part 14 extends from the end of the first occlusal surface 111 on the first protrusion 11, which is at a smaller height from the occlusal plane in the gingival direction, toward the opposing jaw. In this embodiment, this is the proximal end of the first protrusion 11. The limiting part 14 has a limiting surface 141 on the side facing the opposing jaw. In order for the limiting part 14 to restrict the transitional sliding of the second occlusal surface 211 without affecting the sliding of the second occlusal surface 211 to the target position, the limiting surface 141 in this application is configured such that the angle α between the limiting surface 141 and the first occlusal surface 111 needs to be greater than or equal to the angle between the second occlusal surface 211 and the second occlusal surface 211. The angle between the side of the second occlusal surface 211 on the protrusion 21 at the end with a greater height from the occlusal plane in the gingival direction is less than 180°. In this embodiment, the end of the second occlusal surface 211 at the greater height from the occlusal plane in the gingival direction is the mesial end of the second protrusion 21. Therefore, "the side of the second occlusal surface 211 on the second protrusion 21 at the end with a greater height from the occlusal plane in the gingival direction" is the side of the mesial end of the second protrusion 21. That is, the angle α between the limiting surface 141 and the first occlusal surface 111 needs to be greater than or equal to the angle between the second occlusal surface 211 and the side of the mesial end of the second protrusion 21. It is understandable that if the angle α between the limiting surface 141 and the first occlusal surface 111 is less than the angle between the second occlusal surface 211 and the side of the mesial end of the second protrusion 21, the second occlusal surface 211 will contact the end of the limiting surface 141 away from the maxilla before it slides to the target position. This prevents the patient's mandible from moving sagittally forward to the predetermined target position, affecting the treatment effect and duration. It is also understandable that if the angle α between the limiting surface 141 and the first occlusal surface 111 is 180°, the limiting surface 141 overlaps with the extension surface of the first occlusal surface 111. In this case, the second occlusal surface 211 may continue to slide forward along the extension surface of the first occlusal surface 111, potentially causing the patient's mandible to be excessively protruded. Therefore, the angle α between the limiting surface 141 and the first occlusal surface 111 can be as follows: Figure 3 As shown, the included angles with the second occlusal surface 211 and the side surface of the second protrusion 21 at one proximal end are equal; it can also be as follows: Figure 4 As shown, the first occlusal surface 111 can be set parallel to the first bottom surface 112. In this case, the angle α between the limiting surface 141 and the first occlusal surface 111 is an obtuse angle; it can also be as follows: Figure 5As shown, the included angle α between the limiting surface 141 and the first occlusal surface 111 can be set to any angle between the included angle between the side surface of the second occlusal surface 211 and the side surface of the second protrusion 21 at the proximal end and 180°.

[0085] For further explanation, please refer to [link / reference]. Figure 6 As shown, the angle β between the first occlusal surface 111 and the first bottom surface 112 can range from 15° to 55°, and the angle γ between the second occlusal surface 211 and the second bottom surface 212 can also range from 15° to 55°. Preferably, to ensure that the first occlusal surface 111 and the second occlusal surface 211 are parallel to each other in a stable occlusal state, the angle β between the first occlusal surface 111 and the first bottom surface 112 and the angle γ between the second occlusal surface 211 and the second bottom surface 212 are equal. It can be understood that the difference between these two angles is kept within a certain angle threshold. For example, the difference between these two angles is acceptable if it is within 5°. Such a difference may be caused by the precision of the manufacturing process or it may be due to artificial design. Specifically, in one embodiment, the angle β between the first occlusal surface 111 and the first bottom surface 112 and the angle γ between the second occlusal surface 211 and the second bottom surface 212 are both 15°, and such patients require a smaller amount of mandibular advance. In other embodiments, the angle β between the first occlusal surface 111 and the first bottom surface 112 and the angle γ between the second occlusal surface 211 and the second bottom surface 212 are both 55°, and such patients usually require a larger amount of mandibular advance. Of course, in yet another embodiment, the angle β between the first occlusal surface 111 and the first bottom surface 112 and the angle γ between the second occlusal surface 211 and the second bottom surface 212 can also be 25°, 30°, 45°, etc., and can be selected according to the specific situation of the patient. By setting these two angles, this application provides a variety of options for the dental instrument 100 of this application. According to the inventor's clinical data, these two angles in the range of 15°-55° can be applied to most Class II malocclusion patients.

[0086] As for the arrangement of the first bottom surface 112 and the second bottom surface 212, in order to facilitate the design by medical design engineers, the first bottom surface 112 and the second bottom surface 212 can preferably be arranged parallel to the occlusal plane.

[0087] For further explanation, please refer to [link / reference]. Figure 7 As shown, the first protrusion 11 and the second protrusion 21 cover at least the buccal lateral surface of one tooth in their corresponding posterior region in the mesiodistal direction; specifically, they may cover the length of tooth number 6 in the posterior region, respectively; or they may be as follows: Figure 1As shown, the first protrusion 11 and the second protrusion 21 respectively cover the portions of two adjacent teeth in the posterior region in the mesiodistal direction; specifically, they may cover half the length of the 5th and 6th teeth in the posterior region, respectively. Figure 11 As shown, the first protrusion 11 and the second protrusion 21 cover a length exceeding that of a single tooth in the mesiodistal direction. For example, they can cover half the length of the 6th and 5th teeth in the posterior region. It is understood that the first protrusion 11 and the second protrusion 21 can also cover the length of more teeth in the mesiodistal direction, such as 3 or 4 teeth. The specific arrangement depends on the orthodontic needs and individual case, and will not be elaborated upon here.

[0088] For further explanation, please refer to [link / reference]. Figure 8 As shown, the width L along the buccal-lingual direction of both the first occlusal surface 111 and the second occlusal surface 211 is 3mm-8mm. This buccal-lingual width L ensures that the first occlusal surface 111 and the second occlusal surface 211 have sufficient contact area for stable occlusion during biting contact, without causing the patient significant foreign body sensation. Preferably, the widths of the first occlusal surface 111 and the second occlusal surface 211 along the buccal-lingual direction are equal. Thus, when the first occlusal surface 111 and the second occlusal surface 211 are in contact during biting contact, the contact area is consistent, resulting in a more stable occlusion. It is understood that the difference between the widths of the first occlusal surface 111 and the second occlusal surface 211 along the buccal-lingual direction is kept within a certain width threshold. For example, a difference of less than 1mm is acceptable. Such a difference may be due to manufacturing precision or it may be intentionally designed. Specifically, in one embodiment, the width L of the first occlusal surface 111 and the second occlusal surface 211 along the buccal-lingual direction is 3mm, 5mm, 8mm, etc., which can be selected according to the specific situation of the patient, providing multiple options for clinical practice.

[0089] For further explanation, please refer to [link / reference]. Figure 8As shown, there are two first protrusions 11, symmetrically arranged about the Z-line of the teeth on the buccal surfaces of the left and right sides of the posterior tooth region of the first shell-shaped body 1; there are two second protrusions 21, protruding from the buccal surfaces of the posterior tooth region of the second shell-shaped body 2 corresponding to the positions of the first protrusions 11. This symmetrical arrangement about the Z-line of the teeth ensures a more balanced force distribution on both sides of the patient, providing comfort and further guaranteeing the stability of the first occlusal surface 111 and the second occlusal surface 211 during occlusal contact, preventing misalignment. It is understood that there can also be four first protrusions 11, with two spaced apart in the left posterior tooth region and two spaced apart in the right posterior tooth region, symmetrically arranged about the Z-line of the teeth on both sides; similarly, there can also be four second protrusions 21, with two spaced apart in the left posterior tooth region and two spaced apart in the right posterior tooth region, symmetrically arranged about the Z-line of the teeth on both sides.

[0090] For further explanation, please refer to [link / reference]. Figure 9 and Figure 10 As shown, at least one side surface of the first protrusion 11 and / or the second protrusion 21 is provided with a plurality of concave or convex reinforcing ridges 5 along the gingival-maxillary direction. This can be achieved as follows: Figure 9 As shown, the first protrusion 11 has three reinforcing ridges 5 protruding outwards towards the mesial end on its mesial side. These reinforcing ridges 5 extend from the first bottom surface 112 to the first occlusal surface 111 along the gingival-maxillary direction. This enhances the first protrusion 11's resistance to deformation in the gingival-maxillary direction. Similarly, the second protrusion 21 has three reinforcing ridges 5 protruding outwards towards the mesial end on its mesial side. These reinforcing ridges 5 extend from the second bottom surface 212 to the second occlusal surface 211 along the gingival-maxillary direction. This enhances the second protrusion 21's resistance to deformation in the gingival-maxillary direction, preventing deformation (such as being crushed) when it comes into contact with the first occlusal surface 111. The enhanced resistance to deformation of the first protrusion 11 and the second protrusion 21 prevents deformation (such as being crushed) during occlusal contact, thus ensuring the therapeutic effect of the dental instrument 100.

[0091] It can also be like Figure 10As shown, the first protrusion 11 has two outwardly protruding reinforcing ridges 5 on its mesial and distal sides, as well as on its buccal and lingual sides. These reinforcing ridges 5 extend from the first bottom surface 112 to the first occlusal surface 111 along the gingival-maxillary direction. This enhances the first protrusion 11's resistance to deformation in the gingival-maxillary direction. Similarly, the second protrusion 21 has two outwardly protruding reinforcing ridges 5 on its mesial and distal sides, as well as on its buccal and lingual sides. These reinforcing ridges 5 extend from the second bottom surface 212 to the second occlusal surface 211 along the gingival-maxillary direction. This enhances the second protrusion 21's resistance to deformation in the gingival-maxillary direction, preventing deformation (such as being crushed) when it comes into contact with the first occlusal surface 111. With their enhanced resistance to deformation, the first occlusal surface 111 and the second occlusal surface 211 can avoid deformation (such as being crushed) during occlusal contact, thus ensuring the therapeutic effect of the dental instrument 100.

[0092] It is understood that the reinforcing ridge 5 on the first protrusion 11 can also be formed by recessing any side of the first protrusion 11, and the reinforcing ridge 5 on the second protrusion 21 can also be formed by recessing any side of the second protrusion 21. Alternatively, the reinforcing ridge 5 can be provided only on the first protrusion 11; or only on the second protrusion 21.

[0093] It is also understood that the reinforcing ridge 5 is not limited to completely penetrating upwards in the gingival region as described above, but can also be a discrete distribution of several protrusions or several groove structures.

[0094] Please refer to it again. Figure 9 and Figure 10 As shown, when the first protrusion 11 and the second protrusion 21 are respectively disposed on the buccal side of the first shell-shaped body 1 and the second shell-shaped body 2, the first protrusion 11 and the second protrusion 21 can be directly protruded almost perpendicularly towards the buccal side and towards the occlusal surface (e.g. Figure 9 (As shown). It can also be as follows: Figure 10 The protrusions, extending towards the cheek and the occlusal surface, are preferably arranged in a curved shape. Preferably, the surfaces of the first protrusion 11 and the second protrusion 21 near the cheek are rounded and curved to conform to the shape of the patient's cheek muscles. This arrangement allows the cheek-side surfaces of the first protrusion 11 and the second protrusion 21 to well adapt to the patient's cheek muscles, enhancing comfort, increasing willingness to wear the device, and facilitating the achievement of corrective effects.

[0095] In this embodiment, the first protrusion 11 and the first shell-shaped body 1 are integral structures, and the second protrusion 21 and the second shell-shaped body 2 are integral structures. This configuration simplifies the manufacturing process, for example, by integral molding through hot pressing or additive manufacturing. It also improves the connection strength of each structural component and eliminates the risk of parts falling off.

[0096] Example 2

[0097] To achieve the purpose of this invention, this application also provides a dental instrument 100, please refer to the following: Figure 11 The only difference between this embodiment and Embodiment 1 is that the effective height of the first protrusion 11 and the second protrusion 21 in the gingival-occlusal direction, that is, the total protrusion height of the first protrusion 11 and the second protrusion 21 in the gingival-occlusal direction, is equal to the sum of the first height h1 and the fourth height h4, which is achieved by the following: the first occlusal surface 111 extends beyond the occlusal plane in the gingival-occlusal direction, and the second occlusal surface 211 is lower than the occlusal plane in the gingival-occlusal direction. Since the human maxilla is fixed to the skull and its position is relatively constant, it is known that the relative movement of the maxilla and mandible in the sagittal direction is caused by the movement of the mandible in the sagittal direction. In this embodiment, guiding the mandible forward is achieved by guiding the mandible forward. With this configuration in this embodiment, the first protrusion 11 has a larger protrusion height and volume in the gingival-maxillary direction, and the first protrusion 11 is located on the first shell-shaped body 1 that accommodates the maxillary teeth and remains relatively stationary; the second protrusion 21 has a smaller protrusion height in the gingival-maxillary direction, and the second protrusion 21 is located on the second shell-shaped body 2 that accommodates the mandibular teeth and has a smaller volume; that is, with this configuration, the foreign body sensation is reduced during movement, and the patient's comfort is improved.

[0098] Both this and the setting method in Embodiment 1 can achieve an effective height of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction equal to the sum of the first height h1 and the fourth height h4; both are applicable to cases where the maxillary and mandibular sagittal adjustment can be performed without opening the bite to relieve occlusal interference. Clinically, the setting can be selected according to the patient's wishes, which is convenient and flexible.

[0099] The other technical solutions in this embodiment are the same as those in Embodiment 1. They can be used in conjunction with the technical solutions in this embodiment if they do not conflict with this embodiment. They will not be described again here.

[0100] Example 3

[0101] To achieve the purpose of this invention, this application also provides a dental instrument 100, please refer to the following: Figures 12 to 14As shown. The difference between this embodiment and Embodiment 1 is that the effective height of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction, that is, the total protrusion height of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction, is greater than the sum of the first height h1 and the fourth height h4, opening the patient's upper and lower jaws to a predetermined height; the first occlusal surface 111 and / or the second occlusal surface 211 are set beyond the occlusal plane in the gingival-maxillary direction. At this time, when the patient wears the dental instrument 100, the patient's upper and lower jaws have an open jaw gap in the gingival-maxillary direction. The height of the open jaw gap can be designed based on the orthodontic purpose. For example, when adjusting the positional relationship of the upper and lower jaws, specifically, when performing sagittal adjustment such as guiding the mandible forward as in this embodiment, if there is occlusal interference from individual or many teeth, making it impossible to adjust the upper and lower jaws, then the open jaw gap needs to be designed to be able to contact the above-mentioned occlusal interference; so that the upper and lower jaws can guide the mandible forward to the target position.

[0102] To further explain, such as Figure 12 As shown, the first occlusal surface 111 extends beyond the occlusal plane in the gingival-occlusal direction, meaning the protrusion height of the first protrusion 11 in the gingival-occlusal direction is greater than the height of the first bottom surface 112 from the occlusal plane. For example... Figure 13 As shown, the second occlusal surface 211 is positioned above the occlusal plane in the gingival-occlusal direction, that is, the protrusion height of the second protrusion 21 in the gingival-occlusal direction is greater than the height of the second bottom surface 212 from the occlusal plane. In this figure, the positions of the first shell-shaped body 1 and the occlusal plane are indicated by dashed lines, which is intended to show the structure of the second occlusal surface 211 extending above the occlusal plane.

[0103] In one implementation, such as Figure 14 As shown, the first occlusal surface 111 and the second occlusal surface 211 are both set beyond the occlusal plane in the gingival-maxillary direction. There is an open bite gap between the patient's upper and lower jaws, either in the posterior tooth region or in the anterior tooth region; or there is an open bite gap in both the posterior and anterior tooth regions at the same time. The height of the open bite gap is sufficient to eliminate the occlusal interference between the upper and lower jaws during the adjustment of the relationship between the upper and lower jaws, thereby ensuring that the jaw position adjustment of the upper and lower jaws can be achieved.

[0104] The corrective effect to be achieved in this embodiment is to create an open jaw gap in the gingival-maxillary direction for the patient's upper and lower jaws. It is understood that, in addition to... Figure 14In addition to the embodiments shown, the first occlusal surface 111 is provided to extend beyond the occlusal plane in the gingival-maxillary direction. As long as the protrusion height of the first protrusion 11 in the gingival-maxillary direction is sufficient to meet the required opening gap of the upper and lower jaws when adjusting their jaw positions, thus eliminating occlusal interference between the upper and lower jaws, it is acceptable. It can also be understood that the second occlusal surface 211 is provided to extend beyond the occlusal plane in the gingival-maxillary direction. As long as the protrusion height of the second protrusion 21 in the gingival-maxillary direction is sufficient to meet the required opening gap of the upper and lower jaws when adjusting their jaw positions, thus eliminating occlusal interference between the upper and lower jaws, it is acceptable. These embodiments are all within the scope of protection of this application.

[0105] When there is an open bite gap between the upper and lower jaws, please refer to the following to ensure stable occlusion during orthodontic treatment: Figures 14 to 18 As shown, in this embodiment, the first shell-shaped body 1 and / or the second shell-shaped body 2 are provided with stabilizing portions (31, 32) protruding in the direction of occlusion. During occlusion, the patient's upper and lower jaws occlude on the stabilizing portions (31, 32). The stabilizing portions (31, 32) are used to compensate for the open jaw gap formed between the patient's upper and lower jaws caused by the predetermined height in order to stabilize the occlusion state.

[0106] To further explain, such as Figure 14 As shown, the stabilizing elements (31, 32) are respectively provided in the posterior and anterior regions to compensate for the open bite gap formed by the patient's posterior and anterior regions. It is understood that it is also possible to provide the stabilizing elements (31, 32) in only one of the posterior and anterior regions.

[0107] The locations of the posterior and anterior tooth regions in the stabilizing section (31,32) will be explained separately below.

[0108] In the posterior tooth region, the stabilizing part 31 protrudes from the occlusal surface of the first shell-shaped body 1 corresponding to teeth 5-7 in the posterior tooth region. It should be noted that "occlusal surface corresponding to teeth" here refers to the occlusal surface of the first shell-shaped body 1 covering the corresponding teeth in the maxilla when the first shell-shaped body 1 is worn, facing the opposing jaw. The height of the stabilizing part 31 protruding from the occlusal surface of the posterior teeth in the posterior tooth region compensates for the open bite gap in the posterior tooth region, allowing the surface of the stabilizing part facing the opposing jaw to make contact with the corresponding occlusal surface of the opposing teeth when the patient wears the dental instrument 100 and bites. It should be noted that "making contact with the corresponding occlusal surface of the opposing teeth" refers to the occlusal surface of the second shell-shaped body 2 covering the corresponding teeth in the mandible when the second shell-shaped body 2 is worn. It is understood that the stabilizing part 31 is mainly provided to compensate for the instability of occlusion that may occur due to open bite. The location of the stabilizing part 31 in the posterior tooth area is not limited to teeth 5-7. Therefore, when the stabilizing part 31 is provided in the posterior tooth area, it can also be provided on the occlusal surface of any one of teeth 4-7 in the posterior tooth area, or any two adjacent teeth, or any three or four adjacent teeth.

[0109] It is understandable that, such as Figure 17 As shown, the stabilizing part 31 can also be disposed on the occlusal surface of at least one tooth in the posterior tooth region of the second shell-shaped body 2, and can be disposed on the occlusal surface corresponding to any one or any two or three or four adjacent teeth in the posterior tooth region of the second shell-shaped body 2.

[0110] It is also understandable that, such as Figure 18 As shown, the stabilizing part 31 can also be simultaneously disposed on the occlusal surface of at least one tooth in the posterior tooth region of the first shell-shaped body 1 and the second shell-shaped body 2; at this time, the sum of the heights of the stabilizing parts 31 on the first shell-shaped body 1 and the second shell-shaped body 2 protruding towards the opposing jaw can compensate for the open jaw gap formed between the patient's upper and lower jaws caused by the predetermined height to stabilize the occlusal state.

[0111] In the anterior region, the stabilizing part 32 is disposed on the lingual surface of at least one tooth in the anterior region of the first shell-shaped body 1. Specifically, see [link to relevant documentation]. Figure 15 As shown, the stabilizing part 32 can be disposed on the lingual surface of the anterior teeth of the first shell-shaped body 11, and is formed by the lingual surface of the portion of the first shell-shaped body 1 that encloses the anterior teeth 101 protruding lingually and toward the opposing direction. For example, it is suitable for the target position of the maxillary and mandibular occlusal adjustment when the incisal edge of the anterior teeth of the maxillary and mandibular regions is in the orthodontic stage; see also Figure 16As shown, the stabilizing part 32 can also be arranged across the lingual to labial sides of the teeth in the anterior region. The stabilizing part 32 protrudes towards the corresponding position in the mandibular anterior region between the lingual and labial sides of the maxillary anterior region. For example, it is suitable for the correction stage where the target position for adjusting the maxillary and mandibular position is the lingual position of the incisal edge of the mandibular anterior teeth relative to the incisal edge of the maxillary anterior teeth. Specifically, the stabilizing surface of the stabilizing part 32, that is, the side surface of the stabilizing part 32 that contacts the part of the second shell-shaped body 2 covering the incisal edge of the opposing anterior teeth 102, needs to satisfy the following: the corresponding incisal edge of the opposing tooth can occlude on the stabilizing surface, and the height of the stabilizing part 32 protruding from the incisal edge of the mandibular anterior teeth can compensate for the open bite gap in the anterior region. Similarly, the "incisal edge of the tooth" here refers to the end of the part of the second shell-shaped body 2 covering the incisal edge of the tooth facing the opposing tooth.

[0112] Preferably, the stabilizing part 31 is further provided with a stabilizing recess 321, which is formed by the stabilizing surface concave inward toward the jaw, and can guide the corresponding anterior teeth of the mandible to be placed in the receiving space of the stabilizing recess 321. At the same time, the receiving space of the stabilizing recess 321 is larger than the outer contour shape of the tooth placed therein, so that the tooth can have a predetermined space for movement within it to increase comfort.

[0113] It is understandable that when the stabilizing part 32 is provided in the anterior tooth region, the stabilizing part 32 can also be provided on the second shell-shaped body 2. For example, it can be provided on the labial side of the teeth in the anterior tooth region of the second shell-shaped body 2, or it can be provided from the labial side to the lingual side. In short, as long as the following conditions are met: the stabilizing surface of the stabilizing part 32 after being provided can make occlusal contact with the incisal edge of the corresponding anterior tooth of the first shell-shaped body 1, and the height of the stabilizing part 32 protruding from the incisal edge of the anterior tooth region of the occlusion can compensate for the open bite gap in the anterior tooth region.

[0114] The other technical solutions in this embodiment are the same as those in Embodiment 1. They can be used in conjunction with the technical solutions in this embodiment if they do not conflict with this embodiment. They will not be described again here.

[0115] Example 4

[0116] To achieve the purpose of this invention, this application also provides a dental instrument 100, please refer to the following: Figures 19 to 21As shown. The difference between this embodiment and Embodiment 1 is that the first protrusion 11 and the second protrusion 21 are respectively disposed on the lingual surface of the first shell-shaped body 1 and the second shell-shaped body 2. There are two first protrusions 11, which are symmetrically disposed about the Z-line of the teeth on the lingual surface of the left and right sides of the posterior tooth region of the first shell-shaped body 1; there are two second protrusions 21, which are respectively protruding and disposed on the lingual surface of the posterior tooth region of the second shell-shaped body 2 at the positions corresponding to the first protrusions 11. The symmetrical arrangement about the Z-line of the teeth can make the force on the left and right sides of the patient more balanced, which can bring comfort to the patient and further ensure the stability of the first occlusal surface 111 and the second occlusal surface 211 during occlusal contact, preventing biting deviation. It is understandable that the first protrusion 11 can also be four in number, with two spaced apart in the left posterior tooth area and two spaced apart in the right posterior tooth area, symmetrically arranged about the tooth midline Z on both sides; at the same time, the second protrusion 21 can also be four in number, with two spaced apart in the left posterior tooth area and two spaced apart in the right posterior tooth area, symmetrically arranged about the tooth midline Z on both sides.

[0117] It is understood that, in other embodiments, the first protrusion 11 and the second protrusion 21 are respectively disposed on the cheek side and tongue side of the first shell-shaped body 1 and the second shell-shaped body 2. (See also...) Figure 22 As shown, the first shell-shaped body 1 has two first protrusions 11 arranged symmetrically about the tooth midline Z on its buccal side and two first protrusions 11 arranged symmetrically about the tooth midline Z on its lingual side; the second shell-shaped body 2 has two second protrusions 21 arranged symmetrically about the tooth midline Z on its buccal side and two second protrusions 21 arranged symmetrically about the tooth midline Z on its lingual side. It is understood that the first protrusion 11 on the buccal side and the first protrusion 11 on the lingual side of the first shell-shaped body 1 can correspond to the same tooth position, such as in this embodiment, both corresponding to tooth 5 and tooth 6; or they can be at least partially staggered on different tooth positions, for example, the first protrusion 11 on the buccal side of the left and right sides corresponds to tooth 4 and tooth 5, and the first protrusion 11 on the lingual side of the left and right sides corresponds to tooth 5 and tooth 6; the second protrusion 21 on the buccal side of the left and right sides corresponds to tooth 4 and tooth 5, and the second protrusion 21 on the lingual side of the left and right sides corresponds to tooth 5 and tooth 6; all of these are possible and not limited to this. Figure 22 The settings are shown below.

[0118] Furthermore, when the first protrusion 11 and the second protrusion 21 are respectively disposed on the tongue side of the first shell-shaped body 1 and the second shell-shaped body 2, the surface of the first protrusion 11 and / or the second protrusion 21 near the tongue is provided with a concave structure to avoid the tongue. The concave structure is formed by the surface of the first protrusion 11 and / or the second protrusion 21 near the tongue concave towards the side away from the tongue. The concave structure encloses and forms a tongue accommodating space 4. The tongue accommodating space 4 penetrates the proximal and distal surfaces of the first protrusion 11 and / or the second protrusion 21 to allow the tongue to pass through, thereby avoiding the tongue and preventing the first protrusion 11 and the second protrusion 21 disposed on the tongue side from interfering with the tongue and causing a foreign body sensation. Specifically, the concave structure that avoids the tongue can be provided only on the lingual side of the second protrusion 21, with the second protrusion 21 located in the posterior tooth region. The concave structure avoids the more posterior part of the tongue, which is the natural position of the tongue, providing greater comfort for the patient. Alternatively, the concave structure can be provided only on the lingual side of the first protrusion 11. In this case, the patient's tongue is slightly elevated, which is suitable for cases requiring tongue elevation and simultaneous tongue elevation treatment. Of course, it can also be suitable for cases where the tongue is already positioned relatively high. The application scenarios for this concave structure are not limited to the cases listed in this application. Furthermore, concave structures that avoid the tongue can be provided on both the lingual sides of the first protrusion 11 and the second protrusion 21. Specifically, the choice can be flexible and based on clinical needs.

[0119] Specifically, see Figure 20 As shown, the concave surface of the concave structure can cover the entire surface of the first protrusion 11 near the tongue or the second protrusion 21 near the tongue. That is, the concave structure is formed by the entire surface of the first protrusion 11 near the tongue or the second protrusion 21 near the tongue concave inward toward the cheek. The concave structure formed in this way has a larger space, which can avoid the tongue while also giving the tongue room to move upward toward the gum and jaw, further increasing comfort.

[0120] Understandably, see Figure 21 As shown, the concave surface of the concave structure may only cover the surface of the first protrusion 11 near the tongue or the second protrusion 21 near the tongue, corresponding to the position of the patient's tongue; the space of the concave structure should be able to avoid the tongue.

[0121] Furthermore, to enhance the mechanical strength of the first protrusion 11 and the second protrusion 21 in the gingival-maxillary direction, and to prevent deformation (such as collapse) of either the first protrusion 11 or the second protrusion 21 during biting, this application provides a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction on the surface of the concave structure; or, a plurality of concave or convex reinforcing ridges are provided along the gingival-maxillary direction on the surface of the first protrusion 11 and the second protrusion 21 near the tongue, excluding the concave structure. Specifically, the formation of the reinforcing ridges is consistent with the reinforcing ridges provided on the side surfaces of the first protrusion 11 and the second protrusion 21 in Embodiment 1, and will not be repeated here.

[0122] The other technical solutions in this embodiment are the same as those in Embodiment 1. They can be used in conjunction with the technical solutions in this embodiment if they do not conflict with this embodiment. They will not be described again here.

[0123] Example 5

[0124] To achieve the purpose of this invention, this application also provides a dental instrument 100, please refer to the following: Figure 23 As shown. The difference between this embodiment and Embodiment 1 is that, in this embodiment, the third height h3 is greater than the second height h2, and the height of the first occlusal surface 111 from the first bottom surface 112 in the gingival-occlusal direction gradually decreases from the mesial end to the distal end, that is, the first occlusal surface 111 is inclined downward from the distal end towards the mesial end; the sixth height h6 is greater than the fifth height h5, and the height of the second occlusal surface 211 from the second bottom surface 212 in the gingival-occlusal direction gradually increases from the mesial end to the distal end, that is, the second occlusal surface 211 is inclined upward from the distal end towards the mesial end. During wearing, the distal end of the second occlusal surface 211 first contacts the mesial end of the first occlusal surface 111. Guided by the inclined plane of the first occlusal surface 111, the second occlusal surface 211 gradually occludes along the first occlusal surface 111 to the target position, causing the second shell-shaped body 2 to move backward relative to the first shell-shaped body 1 in the sagittal direction. This moves the patient's mandible backward in the sagittal direction to the target position, which is beneficial for the correction of Class III malocclusion. In this way, the gradual occlusion of the first occlusal surface 111 and the second occlusal surface 211 to the target position avoids the discomfort caused by one-step wearing, making wearing more interesting and easier to control. The patient's initiative and compliance are improved, which is conducive to achieving the corrective effect.

[0125] Other technical solutions in this embodiment are the same as those in Embodiment 1. They can be used in conjunction with the technical solutions in this embodiment if they do not conflict with this embodiment. They will not be described again here.

[0126] Example 6

[0127] To achieve the purpose of this invention, this application also provides a dental instrument 100, please refer to the following: Figures 24 to 28 As shown. The difference between this embodiment and Embodiment 1 is that in this embodiment, the first protrusion 11 and the first shell-shaped body 1 are separately configured, and the second protrusion 21 and the second shell-shaped body 2 are separately configured. The advantage of the separate configuration is that when the separate structure is fixedly connected by a detachable connection, it provides a way to replace the first protrusion 11 and the second protrusion 21. When the first protrusion 11 or the second protrusion 21 needs to be adjusted according to the actual situation, only the first protrusion 11 or the second protrusion 21 needs to be replaced individually, without having to replace the first shell-shaped body 1 or the second shell-shaped body 2 together, thus saving costs. Even if it is not fixedly connected by a detachable connection, the separate structure can provide more flexibility in the selection of materials for the first protrusion 11 and the second protrusion 21; moreover, the separate structure will not damage the structure of the first shell-shaped body 1 and the second shell-shaped body 2, thereby not affecting the wrapping force of the first shell-shaped body 1 and the second shell-shaped body 2, and ultimately not affecting the orthodontic effect.

[0128] Specifically, a first mounting platform 10 is provided on the buccal side of the posterior tooth region of the first shell-shaped body 1, protruding towards the distal teeth. In this embodiment, the surface of the first mounting platform 10 on the first shell-shaped body 1 facing the opposing jaw is concave inward towards the occlusal direction to form a first positioning structure 12. The first bottom surface 112 of the first protrusion 11 protrudes outward to form a second positioning structure 13 that matches the first positioning structure 12. The first protrusion 11 is positioned and fixed on the first mounting platform 10 by matching the first positioning structure 12 and the second positioning structure 13. It can be understood that the first protrusion 11 is directly connected to the first mounting platform 10 after the concave-convex matching of the first positioning structure 12 and the second positioning structure 13, without the need for further bonding with adhesive.

[0129] It is understood that in some embodiments, the first positioning structure 12 may also be formed by the surface of the first mounting platform 10 facing the jaw protruding outward in the jaw direction.

[0130] The second shell-shaped body 2 has a second mounting platform 20 formed by protruding distally from the posterior tooth region of its lateral surface. The second mounting platform 20 located on the left posterior tooth region of the second shell-shaped body 2 has a third positioning structure 22 formed by its surface facing the opposing jaw and concave inwards towards the occlusal direction. The second bottom surface 212 of the second protrusion 21 protrudes outwards to form a fourth positioning structure 23 that matches the third positioning structure 22. Similarly, the second mounting platform 20 located on the right posterior tooth region of the second shell-shaped body 2 has a third positioning structure 22 formed by its surface facing the opposing jaw and concave inwards. The second bottom surface 212 of the second protrusion 21 also concave inwards to form a fourth positioning structure 23 that matches the third positioning structure 22. The second protrusion 21 is positioned and bonded to the second mounting platform 20 by the matching of the third positioning structure 22 and the fourth positioning structure 23. It is understood that the second protrusion 21 is directly connected to the second mounting platform 20 after the matching of the third positioning structure 22 and the fourth positioning structure 23, without the need for further bonding with adhesive. In clinical practice, the third positioning structure 22 can be flexibly selected either by the surface of the second mounting platform 20 facing the opposing jaw and being concave inward toward the jaw or convex outward toward the opposing jaw.

[0131] Furthermore, in this embodiment, the first positioning structure 12 and the third positioning structure 22 are protruding structures with a "T"-shaped longitudinal section, and the second positioning structure 13 and the fourth positioning structure 23 are "T"-shaped groove structures that match the "T"-shaped protruding structures. The advantage of this T-shaped matching is that, while positioning, it can also restrict the first protruding part 11 from vertically upwardly separating from the first shell-shaped body 1, and restrict the second protruding part 21 from vertically upwardly separating from the second shell-shaped body 2. During installation, when the first protruding part 11 and the second protruding part 21 are aligned with the "T"-shaped protruding structure and the "T"-shaped groove structure, they can be pushed forward from the proximal side to the distal side, or from the distal side to the proximal side, respectively, for installation. Of course, it is understood that the first positioning structure 12 and the third positioning structure 22, in addition to the "T"-shaped protrusion structure described in this embodiment, can also be any other protrusion structure or any combination of other protrusion structures. For example, the cross-section of the protrusion structure can be polygonal, elliptical or irregular. There is no limitation on the specific structure here. Any protrusion structure that can achieve positioning matching with the second positioning structure 13 and the fourth positioning structure 23 can be implemented.

[0132] Furthermore, the cross-sections of the first positioning structure 12 and the third positioning structure 22 are irregularly shaped. For example, if they have a non-axisymmetric geometry, the first positioning structure 12 and the second positioning structure 13 can be positioned in a uniquely predetermined manner. Similarly, please refer to [reference needed]. Figure 27As shown, taking the third positioning structure 22 as an example, the cross-section of the third positioning structure 22 can also have a non-axisymmetric geometric structure, so that the third positioning structure 22 and the fourth positioning structure 23 can be positioned in a unique predetermined manner.

[0133] Further explanation: There can be multiple first positioning structures 12, with the multiple first positioning structures 12 forming a non-axisymmetric geometric structure. This allows the first positioning structure 12 and the second positioning structure 13 to be positioned in a uniquely predetermined manner. Similarly, there can be multiple third positioning structures 22, with the multiple first positioning structures 12 forming a non-axisymmetric geometric structure, allowing the third positioning structure 22 and the fourth positioning structure 23 to be positioned in a uniquely predetermined manner. This uniquely predetermined positioning enables rapid positioning and installation. When multiple third positioning structures 22 are provided, the cross-sectional shapes of the multiple third positioning structures 22 can be different, such as... Figure 28 As shown, taking the third positioning structure 22 as an example, there are three third positioning structures 22 arranged in an asymmetrical triangular structure. Two of the third positioning structures 22 have the same cross-sectional shape (e.g., circular), while the other is an asymmetrical "D"-shaped structure. It can be understood that when the three third positioning structures 22 are arranged in an asymmetrical triangular structure, the cross-sections of the three third positioning structures 22 can also be the same, such as all being symmetrical circular structures or all being asymmetrical structures. When there are two third positioning structures 22, it is preferable that at least one of them has an asymmetrical structure, thereby achieving a uniquely predetermined installation.

[0134] To further explain, the material stiffness of the first protrusion 11 and the second protrusion 21 is greater than that of the first shell-shaped body 1 and the second shell-shaped body 2. This stiffness setting increases the stability and reliability of the first protrusion 11 and the second protrusion 21 during occlusion, making them less prone to deformation and thus not affecting the orthodontic process.

[0135] Furthermore, in some embodiments, the first protrusion 11 can be a preform made of ceramic or metal, which on the one hand ensures its rigidity, and on the other hand, the surface of the ceramic or metal material is smooth, so that when placed in the mouth, it will not scratch the cheek muscles or tongue even if it comes into contact with the patient's cheek muscles or tongue, making it reliable and comfortable.

[0136] 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.

[0137] 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.

[0138] 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 dental instrument, characterized in that, include: A first shell-shaped body for accommodating the patient's maxillary teeth and a first protrusion protruding from the side of the posterior tooth region of the first shell-shaped body; and a second shell-shaped body for accommodating the patient's mandibular teeth and a second protrusion protruding from the side of the posterior tooth region of the second shell-shaped body. The first protrusion protrudes from the lateral surface of the posterior tooth region of the first shell-shaped body. The first protrusion includes a first occlusal surface facing the opposing side and a first bottom surface away from the opposing side. The length direction of the first protrusion is arranged along the mesiodistal direction of the tooth covered by the first protrusion. The first protrusion protrudes from the buccal-lingual direction towards the distal tooth and from the gingival-occlusal direction towards the opposing tooth. The first bottom surface is set at a first height with the patient's occlusal plane in the gingival-occlusal direction. The first occlusal surface is an inclined plane that is inclined along the mesiodistal direction. The distal end of the first occlusal surface is set at a second height with the distal end of the first bottom surface in the gingival-occlusal direction. The mesial end of the first occlusal surface is set at a third height with the mesial end of the first bottom surface in the gingival-occlusal direction. The second protrusion protrudes from the lateral surface of the second shell-shaped body in the posterior tooth region corresponding to the position of the first protrusion. The second protrusion includes a second occlusal surface facing the opposing side and a second bottom surface away from the opposing side. The length direction of the second protrusion is along the mesiodistal direction of the tooth covered by the second protrusion. The second protrusion protrudes in the buccal-lingual direction and distally, and in the gingival-occlusal direction and opposing direction. The second bottom surface is at a fourth height with the patient's occlusal plane in the gingival-occlusal direction. The second occlusal surface is an inclined plane inclined in the mesiodistal direction. The distal end of the second occlusal surface is at a fifth height with the distal end of the second bottom surface in the gingival-occlusal direction. The mesial end of the second occlusal surface is at a sixth height with the mesial end of the second bottom surface in the gingival-occlusal direction. The effective height of the first protrusion and the second protrusion in the gingival-maxillary direction is the sum of the second height and the fifth height, or the sum of the third height and the sixth height; wherein, The effective height of the first protrusion and the second protrusion in the gingival-maxillary direction is greater than or equal to the sum of the first height and the fourth height, so that when the dental instrument is worn, the first occlusal surface and the second occlusal surface can make occlusal contact and interact with each other, the second occlusal surface slides along the first occlusal surface, and the second shell-shaped body moves relative to the first shell-shaped body in an upward occlusal direction. When the occlusal state is stable, the relative position of the patient's upper and lower jaws is adjusted to the target position, and the first occlusal surface and the second occlusal surface are parallel to each other.

2. The dental instrument according to claim 1, characterized in that, The third height is less than the second height, and the height of the first occlusal surface from the first base surface in the gingival-occlusal direction gradually increases from the mesial end to the distal end; and... The sixth height is less than the fifth height, and the height of the second occlusal surface from the second base surface in the gingival-maxillary direction gradually decreases from the mesial end to the distal end; wherein... When the first occlusal surface and the second occlusal surface interact, the second shell-like body moves forward relative to the first shell-like body in the sagittal direction, guiding the patient's mandible to move forward in the sagittal direction to the target position.

3. The dental instrument according to claim 1, characterized in that, The third height is greater than the second height, and the height of the first occlusal surface from the first base surface in the gingival-occlusal direction gradually decreases from the mesial to the distal end; and... The sixth height is greater than the fifth height, and the height of the second occlusal surface from the second base surface in the gingival-maxillary direction gradually increases from the mesial end to the distal end; wherein... When the first occlusal surface and the second occlusal surface interact, the second shell-like body moves backward in the sagittal direction relative to the first shell-like body, guiding the patient's mandible to move backward in the sagittal direction to the target position.

4. The dental instrument according to claim 1, characterized in that, When the effective height of the first protrusion and the second protrusion in the gingival direction is equal to the sum of the first height and the fourth height; the first occlusal surface is lower than the occlusal plane in the gingival direction, and the second occlusal surface exceeds the occlusal plane in the gingival direction; or, the first occlusal surface exceeds the occlusal plane in the gingival direction, and the second occlusal surface is lower than the occlusal plane in the gingival direction.

5. The dental instrument according to claim 1, characterized in that, When the effective height of the first protrusion and the second protrusion in the gingival-maxillary direction is greater than the sum of the first height and the fourth height, the patient's upper and lower jaws open to a predetermined height; The first occlusal surface and / or the second occlusal surface are positioned beyond the occlusal plane in the gingival-maxillary direction.

6. The dental instrument according to claim 5, characterized in that, The first shell-shaped body and / or the second shell-shaped body are provided with a stabilizing part that protrudes in the direction of the opposing jaw. When biting, the patient's upper and lower jaws bite on the stabilizing part. The stabilizing part is used to compensate for the open jaw gap formed between the patient's upper and lower jaws caused by the predetermined height in order to stabilize the biting state.

7. The dental instrument according to claim 6, characterized in that, The open bite gap is formed in the posterior tooth region of the patient. The stabilizing part is disposed on the occlusal surface of at least one tooth in the posterior tooth region of the first shell-shaped body and / or the second shell-shaped body. During occlusion, the surface of the stabilizing part facing the opposing tooth makes contact with the occlusal surface of the corresponding opposing tooth. The height of the stabilizing part protruding from the occlusal surface of the posterior tooth region of the patient can compensate for the open bite gap in the posterior tooth region.

8. The dental instrument according to claim 6 or 7, characterized in that, The open bite gap is formed in the anterior region of the patient. The stabilizing portion is disposed on the labial or lingual surface of at least one tooth in the anterior region of the first shell-shaped body and / or the second shell-shaped body. The stabilizing portion includes a stabilizing surface that contacts the incisal edge of the opposing anterior tooth. The labial or lingual width of the stabilizing surface satisfies the following: the incisal edge of the opposing tooth can occlude on the stabilizing surface. The height of the stabilizing portion protruding from the incisal edge of the anterior tooth can compensate for the open bite gap in the anterior region.

9. The dental instrument according to claim 1, characterized in that, The end of the first protrusion is provided with a limiting part toward the opposing jaw. When the patient wears the dental instrument to a stable occlusal state, the limiting part restricts the second occlusal surface from continuing to move along the first occlusal surface in the sagittal direction.

10. The dental instrument according to claim 9, characterized in that, The limiting part is provided by extending from the end of the first occlusal surface on the first protrusion where the height of the first occlusal surface is smaller in the gingival direction towards the opposing jaw. The limiting part has a limiting surface on the side facing the opposing jaw. The angle between the limiting surface and the first occlusal surface is greater than or equal to the angle between the second occlusal surface and the side of the second occlusal surface on the second protrusion where the height of the second occlusal surface is larger in the gingival direction towards the opposing jaw, and is less than 180°.

11. The dental instrument according to claim 1, characterized in that, The first occlusal surface is set at an angle of 15°-55° to the first bottom surface, and the second occlusal surface is set at an angle of 15°-55° to the second bottom surface.

12. The dental instrument according to claim 1, characterized in that, The first protrusion and the second protrusion cover the side of at least one tooth in their corresponding posterior region in a mesiodistal orientation.

13. The dental instrument according to claim 1, characterized in that, The width of both the first and second occlusal surfaces along the buccal-lingual direction is 3mm-8mm.

14. The dental instrument according to claim 1, characterized in that, There are two first protrusions, symmetrically arranged about the tooth midline on the buccal surfaces of the left and right sides of the posterior tooth region of the first shell-shaped body; there are two second protrusions, each protruding from the buccal surface of the posterior tooth region of the second shell-shaped body at the position corresponding to the first protrusion; and / or... There are two first protrusions, which are symmetrically arranged on the lingual surfaces of the left and right sides of the posterior tooth region of the first shell-shaped body about the tooth midline; there are two second protrusions, which are respectively protruding and arranged on the lingual surfaces of the posterior tooth region of the second shell-shaped body at the positions corresponding to the first protrusions.

15. The dental instrument according to claim 14, characterized in that, When the first protrusion and the second protrusion are respectively disposed on the tongue side of the first shell-shaped body and the second shell-shaped body, the surface of the first protrusion and / or the second protrusion near the tongue body is provided with a concave structure that avoids the tongue body. The concave structure is formed by the surface of the first protrusion and / or the second protrusion near the tongue body concave inward to the side away from the tongue body. The concave structure encloses and forms a tongue body accommodating space. The tongue body accommodating space penetrates the proximal and distal surfaces of the first protrusion and / or the second protrusion.

16. The dental instrument according to claim 15, characterized in that, The concave surface of the concave structure at least covers the surface of the first protrusion near the tongue or the second protrusion near the tongue corresponding to the position of the patient's tongue.

17. The dental instrument according to claim 15 or 16, characterized in that, The surface of the concave structure is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction; and / or, the surface of the first protrusion and / or the second protrusion near the tongue body, excluding the concave structure, is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction.

18. The dental instrument according to any one of claims 1, 2, 4-7, or 9-16, characterized in that, At least one side surface of the first protrusion and / or the second protrusion is provided with a plurality of concave or convex reinforcing ridges along the gingival-maxillary direction.

19. The dental instrument according to claim 14, characterized in that, When the first protrusion and the second protrusion are respectively disposed on the cheek side of the first shell-shaped body and the second shell-shaped body, the surface of the first protrusion and the second protrusion on the cheek side is configured as a smooth arc surface that matches the shape of the patient's cheek muscle.

20. The dental instrument according to any one of claims 1, 2, 4-7, or 9-16, characterized in that, The first protrusion and the first shell-shaped body are separate components. The side of the posterior tooth region of the first shell-shaped body protrudes distally to form a first mounting platform. The surface of the first mounting platform facing the opposing jaw protrudes toward the opposing jaw or is recessed toward the jaw to form a first positioning structure. The first bottom surface of the first protrusion forms a second positioning structure that matches the first positioning structure. The first protrusion is positioned and bonded to the first mounting platform by matching the first positioning structure and the second positioning structure. The second protrusion and the second shell-shaped body are separate components. The side of the posterior tooth region of the second shell-shaped body protrudes distally to form a second mounting platform. The surface of the second mounting platform facing the opposing jaw protrudes toward the opposing jaw or is recessed toward the jaw to form a third positioning structure. The second bottom surface of the second protrusion forms a fourth positioning structure that matches the third positioning structure. The second protrusion is positioned and bonded to the second mounting platform by matching the third positioning structure and the fourth positioning structure.

21. The dental instrument according to claim 20, characterized in that, The first positioning structure has a non-axisymmetric geometry in its cross-section, so that the first positioning structure and the second positioning structure can be positioned in a unique predetermined manner. The third positioning structure has a non-axisymmetric geometry in its cross-section, so that the third positioning structure and the fourth positioning structure can be positioned in a unique predetermined manner. or, There are multiple first positioning structures, and the multiple first positioning structures are enclosed to form a non-axisymmetric geometric structure so that the first positioning structure and the second positioning structure can be positioned in a unique predetermined manner. There are multiple third positioning structures, and the multiple first positioning structures are enclosed to form a non-axisymmetric geometric structure so that the third positioning structure and the fourth positioning structure can be positioned in a unique predetermined manner.

22. The dental instrument according to claim 20, characterized in that, The material stiffness of the first protrusion and the second protrusion is greater than that of the first shell-shaped body and the second shell-shaped body.

23. The dental instrument according to claim 22, characterized in that, The first protrusion and / or the second protrusion are preforms made of ceramic or metal.

Images