DE212023000199U1 - dental instrument and orthodontic system - Google Patents

Abstract

Dental instrument comprising: a first bowl-shaped body (10) configured to receive upper jaw teeth and a second bowl-shaped body (20) configured to receive lower jaw teeth,
wherein a buccal side surface or lingual side surface of a posterior region of the first shell-shaped body (10) is provided with a first type protrusion (11), a buccal side surface or lingual side surface of a posterior region of the second shell-shaped body (20) is provided with a position limiting portion (21) which cooperates with the first type protrusion (11), and the first type protrusion (11) and the position limiting portion (21) interact with each other to adjust a relative positional relationship between the upper and lower jaws; an occlusal surface of the posterior region of the first cup-shaped body (10) or the second cup-shaped body (20) is provided with a second type protrusion (12) protruding toward an opposite jaw, and a protrusion height of the second type protrusion (12) compensates for a jaw opening space formed by the interaction of the first type protrusion (11) and the position limiting portion (21) in the posterior region to stabilize an occlusal state.

Description

TECHNICAL FIELD

Embodiments of the present application belong to the field of orthodontic technology and relate in particular to the manufacturing technology of orthodontic devices, in particular to a dental instrument and an orthodontic system.

BACKGROUND

The term malocclusion deformity refers to a misalignment of the teeth, dental arches, jaw bones, and craniofacial positions and relationships. The most common symptoms include crowding, gaps, and crossbite. Most malocclusion deformities are abnormalities such as irregular tooth alignment, abnormal occlusal relationship between the upper and lower dental arches, abnormal jaw size and shape, and facial deformities caused by congenital genetic factors or acquired environmental factors such as diseases, unhealthy oral habits, and dental disorders during childhood growth and development or after growth and development due to trauma, periodontal disease, and other factors.

A cupped dental appliance is a device used to treat malocclusion deformities. It uses a safe, elastic, transparent polymer material so that the orthodontic process is almost unnoticeable to others. In protrusive deformities with sagittal jaw position factors, jaw reconstruction is required to correct the jaw position and achieve mandibular advancement. Depending on the indication, today's invisible orthodontic appliances for jaw reconstruction are divided into two types: Twin-Block (TB) and Herbst (HB). The main difference between the two types is whether the patient has a deep overbite. If the patient has a deep overbite, TB is used, while HB is used if the patient does not have a deep overbite but merely has arthrogenic mandibular retrognathia with deep overjet. However, in clinical practice, some patients with arthrogenic mandibular retrognathia may experience partial opening deformity of 1 to 4 mm on the posterior teeth due to curvature problems after advancement. In these cases, simply using the HB orthodontic appliance for advancement may result in insufficient contact area in the posterior region and instability of the jaw position, and may even affect the ability to eat while wearing the appliance due to the opening deformity of the posterior region.

SUMMARY

The technical problem to be solved by the embodiments of the present application is to overcome the deficiencies existing in the prior art and to provide a dental instrument and an orthodontic system that can not only normalize the positional relationship between the upper and lower jaws by the action of the dental instrument, but also increase the occlusal stability after wearing and improve the wearing comfort.

The technical solution provided by the embodiments of the present application includes at least one dental instrument including: a first cup-shaped body configured to receive maxillary teeth and a second cup-shaped body configured to receive mandibular teeth, wherein the buccal side surface or lingual side surface of the posterior region of the first cup-shaped body is provided with a first-type protrusion, the buccal side surface or lingual side surface of the posterior region of the second cup-shaped body is provided with a position limiting portion that cooperates with the first-type protrusion, and the first-type protrusion and the position limiting portion interact with each other to adjust the relative positional relationship between the upper and lower jaws; an occlusal surface of the posterior region of the first cup-shaped body or the second cup-shaped body is provided with a second type protrusion protruding toward an opposite jaw, and a protrusion height of the second type protrusion compensates for a jaw opening space formed by the interaction of the first type protrusion and the position limiting portion in the posterior region to stabilize an occlusal state.

The technical solution provided by the embodiments of the present application further includes at least: an orthodontic system including the above-mentioned multiple sets of dental instruments including at least one dental instrument as described above.

The embodiments of the present application have at least the following advantages and positive effects due to the use of the above-mentioned technical solutions: A protrusion of the first type is the buccal side surface or the lingual side surface of the posterior region of the first cup-shaped body of the corresponding upper jaw, and a position limiting portion that cooperates with the first-type protrusion is provided on the buccal side surface or the lingual side surface of the posterior region of the second cup-shaped body of the corresponding lower jaw. Through the interaction between the first-type protrusion and the position limiting portion, the relative positional relationship between the upper and lower jaws can be adjusted to gradually guide the jaw positions to achieve the proper occlusal relationship. In addition, a second-type protrusion is provided on the occlusal surface of the posterior region of the cup-shaped body to compensate for the jaw opening space that occurs during the relative position adjustment between the jaws in the posterior region. The second type of protrusion comes into contact with the opposing jaw and increases the contact area during occlusion in the posterior region, thereby increasing occlusal stability and improving the wearer's chewing experience.

In some embodiments, the first type protrusion extends along a gum-tooth direction toward the second cup-shaped body and at least partially covers the buccal side surface of the second cup-shaped body; the position limiting portion extends along the gum-tooth direction toward the first cup-shaped body and at least partially covers the buccal side surface of the first cup-shaped body; a mesial surface of the first type protrusion interacts with a distal surface of the position limiting portion to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction, or a distal surface of the first type protrusion interacts with a mesial surface of the position limiting portion to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction. The positions and structures of the first-type protrusion and the position limiting portion are clarified so that the first-type protrusion interacts with the position limiting portion to adjust the relative positional relationship between the maxilla and mandible in the sagittal direction.

In some embodiments, the second type protrusion covers at least one tooth on the cup-shaped body located in the jaw opening space. The second type protrusion covers at least one tooth to increase the contact area and ensure the stability of the occlusion.

In some embodiments, the jaw opening space includes a corresponding space of a second molar, and the second type protrusion covers at least one tooth other than the second molar on the cup-shaped body located in the jaw opening space. The second type protrusion does not cover the second molar. This is because the second molar is the last tooth. The second type protrusion not covering the second molar can prevent interference with the opening of the teeth and can also prevent the cup-shaped body from falling off when worn.

In some embodiments, a tooth position in which the second type of protrusion is disposed is different from a tooth position in which the first type of protrusion is disposed. Different protrusions are disposed in the different tooth positions to avoid excessive adhesions in the same tooth position, which is useful for maintaining the approximate uniformity of the device membrane.

In some embodiments, both the first type protrusion and the second type protrusion are arranged on the first cup-shaped body, and the tooth position where the second type protrusion is arranged is adjacent to the tooth position where the first type protrusion is arranged. The adjacent tooth positions of the first type protrusion and the second type protrusion cause the action positions for adjusting the intermaxillary relationship and stabilizing the occlusion to be adjacent to each other, which is more conducive to a stable occlusion.

In some embodiments, the second type of protrusion is arranged to correspond to the occlusal surface of the tooth in the corresponding position of the opposing jaw. Such an arrangement provides better support and a more stable occlusion.

In some embodiments, when the first cup-shaped body interacts with the second cup-shaped body, the occlusal surface of the second type protrusion is in offset engagement with the occlusal surface of the tooth in the corresponding position of the opposite jaw. The offset engagement of the occlusal surfaces further increases the contact area during occlusion and thereby stabilizes the occlusal state.

In some embodiments, the second type protrusion is provided with a reinforcing structure to increase the strength of the second type protrusion. The reinforcement structure of the second type protrusion can increase the strength and prevent damage to the second type protrusion.

In some embodiments, the reinforcing structure is configured as a reinforcing rib provided on the buccal side surface and/or the lingual side surface of the second type protrusion. The reinforcing rib serving as the reinforcing structure is preferred because the reinforcing rib can be formed in one step during processes such as foil molding. The design of the reinforcing ribs can reduce changes in processing steps and allow for adaptation to existing procedures.

In some embodiments, the second type protrusion has a hollow structure, and the reinforcing structure is a filler filled in the second type protrusion. The filler in the hollow structure can increase the strength of the second type protrusion, which is a simple and effective method.

In some embodiments, the elastic modulus of the material of the first type protrusion and/or the second type protrusion is greater than the elastic modulus of the material of the first shell-shaped body. The use of materials with different elastic moduli can increase the strength of the protrusions.

In some embodiments, the second type protrusions in at least two sets of the dental instruments have different heights along a longitudinal axis direction of the tooth. During orthodontic treatment, the height of the second type protrusion changes along the longitudinal axis of the tooth and adapts to the gradually changing height of the jaw opening space during the course of treatment.

BRIEF DESCRIPTION OF THE DRAWINGS

• 1 is a schematic representation of a first shell-shaped body in a dental instrument in an embodiment of the present application;
• 2 is a schematic representation of a second shell-shaped body in a dental instrument in an embodiment of the present application;
• 3 is a side view of the occlusion state of the first cup-shaped body and the second cup-shaped body of the dental instrument in an embodiment of the present application;
• 4 is a partially schematic diagram of the connecting portion between a first type protrusion and the first shell-shaped body in an embodiment of the present application;
• 5 is a side view of the occlusion state of the first cup-shaped body and the second cup-shaped body of the dental instrument in an embodiment of the present application;
• 6 is a schematic representation of a first shell-shaped body in a dental instrument in an embodiment of the present application;
• 7 is a schematic representation of a first shell-shaped body in a dental instrument in an embodiment of the present application;
• 8 is a side view of the occlusion state of the first cup-shaped body and the second cup-shaped body of the dental instrument in an embodiment of the present application;
• 9 is a schematic representation of the first cup-shaped body in a dental instrument in an embodiment of the present application;
• 10 is a schematic representation of the first cup-shaped body in a dental instrument in an embodiment of the present application;
• 11 is a schematic representation of the second shell-shaped body in a dental instrument in an embodiment of the present application; and
• 12 is a schematic representation of the second cup-shaped body in a dental instrument in an embodiment of the present application.

DETAILED DESCRIPTION OF THE EMBODIMENTS

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the specific implementations of the present application are explained below with reference to the accompanying drawings. It is obvious that the drawings described below are only some embodiments of the present application. Provided that no conflicts arise, the embodiments and technical features in the embodiments of the present application. Those skilled in the art can derive further drawings based on these drawings without inventive effort.

In order to keep the drawings clear, only the sections that relate to the present application are shown schematically in the drawings and do not represent the actual structure of the product. In addition, for the sake of clarity and comprehensibility of the drawings, in some figures only one of the components with the same structure or function is shown schematically or only one of them is identified. In this document, "one" does not mean "only one" but can also mean "more than one".

One embodiment of the present disclosure provides a dental instrument. As in 1 and 2 As shown, the dental instrument comprises: a first cup-shaped body 10 configured to receive maxillary teeth, and a second cup-shaped body 20 configured to receive mandibular teeth. The buccal side surface of the posterior region of the first cup-shaped body 10 is provided with a first-type protrusion 11. The buccal side surface of the posterior region of the second cup-shaped body 20 is provided with a position limiting portion 21 that cooperates with the first-type protrusion 11. The first-type protrusion 11 and the position limiting portion 21 interact with each other to adjust the relative positional relationship between the upper and lower jaws.

Below, the relevant terms mentioned herein are first explained. The “posterior region” is defined according to the tooth classification in the second edition of “Introduction to Oral Medicine” published by Peking University Medical Press, pages 36-38, and includes premolars and molars, which are indicated as teeth 4-8 using the FDI notation method, and the anterior region is indicated as teeth 1-3 using the FDI notation method. In addition, the mesial and distal surfaces are the two surfaces of the tooth crown that are adjacent to the neighboring teeth and are collectively called the neighboring surfaces. The surface closer to the facial midline is called the mesial surface, and the surface farther from the facial midline is called the distal surface. In addition, the sagittal plane is an anatomical term. The human body is divided into left and right halves, where the left and right subsections are sagittal planes, while the equal-sized left and right subsections are called the mid-sagittal plane. According to the medical imaging technology terminology published in 2020, the sagittal direction refers to a direction parallel to the sagittal plane in which the centerline of X-rays originates from the front or back of the subject's body.

As in 3 As shown, in some embodiments, the first type protrusion 11 extends along a gum-tooth direction toward the second cup-shaped body 20 and at least partially covers the buccal side surface of the second cup-shaped body 20. The position limiting portion 21 extends along the gum-tooth direction toward the first cup-shaped body 10 and at least partially covers the buccal side surface of the first cup-shaped body 10. The gum-tooth direction refers to a direction from the gum to the top of the tooth on the gum. A mesial surface 112 of the first type protrusion 11 interacts with a distal surface 211 of the position limiting portion 21 to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction. It can be seen that the first type protrusion 11 and the cooperating position limiting portion 21 can be arranged on the two buccal side surfaces, respectively, so that the jaws can be guided from both sides and the occlusal state can be stabilized by the combined action of both sides.

In some embodiments, the first type protrusion 11 and the position limiting portion 21 have the shape of fangs. The portion near the connection with the cup-shaped body may be referred to as the root, and the portion away from the root may be referred to as the tip. In practical applications, the root of each first type protrusion 11 and the position limiting portion 21 gradually tapers toward the tip. In some embodiments, the gingival end of the first type protrusion 11 may be flush with the gingival margin line with the tip pointing toward the opposite jaw tooth, and the gingival end of the position limiting portion 21 may be flush with the gingival margin line with the tip pointing toward the opposite jaw tooth. The long axis directions of the first type protrusion 11 and the position limiting portion 21 are parallel to each other. It is worth noting that the engagement portion between the first type protrusion 11/position limiting portion 21 and the cup-shaped body in which they are arranged is not higher than the occlusal surface surface (also known as maxillofacial surface), as shown by the dotted circle A in 4 The first type protrusion 11 and the position limiting portion 21, which extend from the upper and lower jaws, respectively, can interact with each other during the wearer's biting. The first type protrusion 11 of the first cup-shaped body 10 applies a sagittal upward and forward force to the position limiting portion 21 of the second cup-shaped body 20, and the position limiting portion 21 of the second cup-shaped body 20 applies a sagittal upward and backward force to the first type protrusion 11. These forces tend to restore the correct position of the tooth and jaw area, thus achieving the purpose of treating malocclusion deformities.

It is worth mentioning that in the design, the inner side of the extended section does not collide with the teeth of the opposite jaw, and the extended section does not collide with the tip of the teeth of the opposite jaw. At the same time, the tips of the extended sections of the upper and lower jaws do not collide, so the occlusion process is not hindered.

In some embodiments, such as in 5 As shown, the first type protrusion 11 on the first cup-shaped body 10 and the position limiting portion 21 on the second cup-shaped body 20 may each be provided with a reinforcing rib 111 having an uneven structure on the buccal side surface. The reinforcing rib 111 is arranged along the longitudinal axis direction of the teeth to increase the strength of the first type protrusion 11 and the position limiting portion 21 to prevent damage during occlusion or interaction.

Furthermore, in some embodiments, an occlusal surface of the posterior region of the first cup-shaped body 10 is provided with a second-type protrusion 12 protruding toward an opposing jaw, and a protrusion height of the second-type protrusion 12 compensates for a jaw opening space formed by the interaction of the first-type protrusion 11 and the position limiting portion 21 in the posterior region to stabilize an occlusal state. In some embodiments, the second-type protrusion 12 covers a tooth on the cup-shaped body (i.e., the first cup-shaped body 10) located in the jaw opening space, and its maximum height may be less than or equal to 4 mm. Although the height is limited to less than or equal to 4 mm in this embodiment, it may be, for example, 2 mm, 1.5 mm, etc. In some embodiments, the height may also be designed to other values, for example 6 mm, which can be designed according to the actual requirements of the physician and is not limited here.

In an embodiment, a tooth position in which the first type protrusion 11 is disposed may be different from a tooth position in which the second type protrusion 12 is disposed. In some embodiments, when the first type protrusion 11 and the second type protrusion 12 are disposed on the same shell-shaped body (e.g., the first shell-shaped body 10), the tooth position in which the second type protrusion 12 is disposed is adjacent to the tooth position in which the first type protrusion 11 is disposed. As in 3 As shown, the first type protrusion 11 is located in tooth position 5 and the second type protrusion 12 is located in tooth position 4. In some embodiments, the first type protrusion 11 may be located in tooth position 4 while the second type protrusion 12 may be located in tooth position 5. The tooth positions of these protrusions may be determined depending on the actual need as well as the height and position of the jaw opening space.

In one embodiment, the tooth position in which the protrusion 11 of the first type is arranged can be the same as the tooth position in which the protrusion 12 of the second type is arranged. For example, both the protrusion 11 of the first type and the protrusion 12 of the second type are arranged in tooth position 4. In practical applications, an arrangement in tooth position 5 can also occur, but these are not listed here.

It is worth noting that in some embodiments, the second type protrusion 12 is arranged to correspond to the occlusal surface of the tooth in the corresponding position of the opposite jaw. In one embodiment, there is no deviation between the upper and lower jaws. Then, when the jaws of the wearer of the dental device in this embodiment of the present application are in occlusion, the positions of the dental arches in the posterior regions of the upper and lower jaws are substantially aligned. As in 1 As shown, the protrusion 12 of the second type can protrude from the center of its tooth position, with the dental arch lines distributed approximately symmetrically on the occlusal surface. In another embodiment, there is a deviation between the upper and lower jaw. In occlusion, a misalignment and misalignment of the Dental arches in the posterior region of the upper and lower jaw. As in 6 As shown, the protruding position of the second type protrusion 121 may be shifted towards the buccal side. Or, as in 7 As shown, the protruding position of the second type protrusion 122 may be displaced toward the lingual side. The protruding position depends on the direction of the deviation. When the maxilla is displaced to the right relative to the mandible, the left second type buccal protrusion is displaced toward the lingual side, and the right second type buccal protrusion is displaced toward the buccal side.

In some embodiments, the second type protrusion 12 is provided with a reinforcing structure to increase the strength of the second type protrusion 12. As in 3 As shown, the reinforcing structure in this embodiment is configured as a reinforcing rib 131 provided on the buccal and/or lingual side of the second type protrusion 124. That is, the reinforcing rib 131 on the second type protrusion 124 may be arranged on both the lingual and buccal sides, or only on the lingual side, or only on the buccal side (not shown in the figure). The reinforcing rib may be uneven and arranged along the long axis direction of the tooth, which can increase the resistance to deformation in the long axis direction and reduce the risk of damage to the second type protrusion 124 by biting.

It should be further noted that in some embodiments, when the first cup-shaped body 10 interacts with the second cup-shaped body 20, the occlusal surface of the second type protrusion 12 is in offset engagement with the occlusal surface of the tooth in the corresponding position of the opposite jaw. The offset engagement between the occlusal surfaces further increases the contact area during occlusion, which is similar to the anatomical design of the occlusal surface of the second type protrusion 12. Such an arrangement increases the contact area between the upper and lower jaws during occlusion and effectively improves the stability of the occlusal state.

In some embodiments, the second type protrusion 12 is integrated into the cup-shaped body on which it is located. In practical applications, the integrated structure can be achieved by the foil hot-pressing technology. The specific foil hot-pressing process generally includes: based on the corresponding digital dental model and a series of digital interdental models, a physical dental model is manufactured by 3D printing. Then, a membrane is hot-pressed onto the model to obtain a cup-shaped dental appliance to enclose the shape of the teeth. The cup-shaped dental appliance enclosing the shape of the teeth is then cut along the gingival line or adjacent to the gingival line to obtain a cup-shaped orthodontic appliance that can accommodate teeth.

It can be seen that by adopting the above technical solution, a first type protrusion 11 is provided on the buccal side surface or lingual side surface of the posterior region of the first cup-shaped body 10 of the corresponding upper jaw, and a position limiting portion 21 cooperating with the first type protrusion 11 is provided on the buccal side surface or lingual side surface of the posterior region of the second cup-shaped body 20 of the corresponding lower jaw. Through the interaction between the first type protrusion 11 and the position limiting portion 21, the relative positional relationship between the upper and lower jaws can be adjusted to gradually guide the jaw positions to achieve the correct occlusal relationship. In some embodiments, a second type protrusion 12 is provided on the occlusal surface of the posterior region of the cup-shaped body to compensate for the jaw opening space that occurs during the relative position adjustment between the jaws in the posterior region. The second type protrusion 12 contacts the opposite jaw and increases the contact area during occlusion in the posterior region, thereby increasing occlusal stability and improving the wearer's chewing experience. In addition, the positions and structures of the first type protrusion 11 and the position limiting portion 21 are clarified so that the first type protrusion 11 interacts with the position limiting portion 21, thereby adjusting the relative positional relationship between the upper and lower jaws in the sagittal direction. In some embodiments, such an arrangement provides better support force and a more stable occlusion. In addition, in some embodiments, different protrusions are arranged in different tooth positions to avoid excessive adhesions in the same tooth position, which is convenient for maintaining the approximate uniformity of the device membrane. In some embodiments, the adjacent tooth positions of the first type protrusion and the second type protrusion cause the action positions for adjusting the intermaxillary relationship and stabilizing the occlusion to be adjacent to each other, which is more conducive to a stable occlusion.

It is worth noting that, although the above embodiment shows a configuration in which a mesial surface of the first-type protrusion 11 interacts with a distal surface of the position limiting portion 21 to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction, in practical applications, a distal surface 211 of the first-type protrusion 11 may interact with a mesial surface 112 of the position limiting portion 21 to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction. That is, in some embodiments, the first-type protrusion 11 is located on the distal side of the position limiting portion 21, but in practical applications, the position limiting portion 21 may be located on the distal side of the first-type protrusion 11 as needed. It is apparent that the direction of the corrective force to be applied can be determined according to different malocclusion relationships so as to design different positional relationships between the first type protrusion 11 and the position limiting portion 21.

It should be noted that in some embodiments, the first type protrusion 11 and the position limiting portion 21 are arranged on the buccal side of the posterior region. However, in practical applications, the first type protrusion 11 and the position limiting portion 21 may also be arranged on the lingual side of the posterior region, as shown in 11 and 12 The principle of their interaction is similar and will not be explained in detail here.

In some embodiments, the second type protrusion 12 is arranged on the first cup-shaped body 10. However, in practical applications, the second type protrusion 12 may also be arranged on the second cup-shaped body 20 and have a similar structure, which is not further described here. In some embodiments, it is arranged on the first cup-shaped body 10, which promotes force stabilization and additionally stabilizes the occlusion state.

An embodiment of the present application further provides a dental instrument. This embodiment is different from the previous embodiment in that in the previous embodiment, the second type protrusion 12 covers one tooth, while in this embodiment, the second type protrusion 12 covers two teeth. By covering multiple teeth, the contact area during occlusion can be further increased, thus effectively improving the stability of occlusion.

In some embodiments, such as in 8 As shown, the second type protrusion 125 specifically covers the first premolar 13 and the second premolar 14 in the posterior region. In some embodiments, when opening deformations are present on both sides of the dental jaw, the second type protrusions 12 are provided on both sides of the dental instrument. The maximum height of the second type protrusions 12 on both sides in the vertical direction can be adjusted according to the opening deformations and can be different.

In some embodiments, when the jaw opening space includes a corresponding second molar space, the second type protrusion 12 covers at least one tooth other than the second molar on the cup-shaped body located in the jaw opening space. That is, even if an opening deformation exists in the space corresponding to the second molar, the second type protrusion 12 is designed not to cover the second molar.

It should also be noted that in some embodiments, the first type protrusion 11 may be located on either side of the mesial buccal side of the first molar. Other structural definitions are similar to those described in the previous embodiment and are not repeated here.

It is worth noting that, as in 9 As shown, the second type protrusion 123 may in some embodiments cover more teeth, such as specifically the first premolar 13, the second premolar 14 and the first molar 15 in the posterior region. There are other forms of coverage that are not listed here. In some embodiments, the second type protrusion 126 may be provided with reinforcing ribs 132 on the buccal and lingual sides, as shown in 10 The specific structure is not described in detail here.

It is apparent that in some embodiments, the second type protrusion 12 covering multiple teeth can further increase the occlusal area of the posterior region and stabilize the occlusal state. In some embodiments, the second type protrusion 12 does not cover the second molar. This is because the second molar is the last tooth. The second type protrusion 12 not covering the second molar can prevent interference with the opening of the teeth and can also prevent the cup-shaped body from falling off when worn.

It should be noted that the “Protrusion 121 of the second type”, the “Protrusion 122 of the second type”, the “second type protrusion 123”, the “second type protrusion 124”, the “second type protrusion 125” and the “second type protrusion 126” in the above embodiments are other terms for the “second type protrusion 12” in corresponding embodiments.

An embodiment of the present application further provides a dental instrument. This embodiment is different from the previous embodiment in that in the previous embodiment, the reinforcing rib 111 is used as the reinforcing structure of the second type protrusion 12, while in this embodiment, a filler filled in the second type protrusion 12 is used as the reinforcing structure.

In some embodiments, the second type protrusion 12 has a hollow structure, and the reinforcing structure is a filler filled in the second type protrusion 12. In some embodiments, the shape of the filler matches the inner diameter of the second type protrusion 12. The filler in the hollow structure can increase the strength of the second type protrusion 12, which is a simple and effective method.

In some embodiments, the material of the filling body is resin. In practical applications, the filling body and the dental instrument may be delivered to the user separately, and the user is instructed to put the filling body into the hollow part of the shell-shaped body before wearing the dental instrument, which is convenient and practical.

It can be seen that the dental instrument in the above embodiment provides a further implementation of the reinforcement structure, which expands the implementation of the reinforcement structure of the protrusion in practical applications, so that it is applicable to various application scenarios.

It is worth noting that in addition to using the reinforcing rib and the inner filler in the aforementioned embodiments to increase the strength of the second type protrusion 12, it is also possible to use materials having a higher elastic modulus to manufacture the second type protrusion 12, and the strength of the protrusion can be improved by selecting materials having other elastic moduli. Similarly, a similar design can also be adopted for the first type protrusion 11, but will not be described in detail here.

It should also be noted that the various forms of reinforcement structure mentioned in the above embodiments can be used individually or in combination to adapt to different application scenarios and design requirements and will not be further described here.

An embodiment of the present application further provides a dental instrument. This embodiment differs from the previous embodiment in that the dental instrument of the previous embodiment is manufactured using the sheet hot-pressing technology, while the dental instrument of this embodiment is manufactured using 3D printing.

In some embodiments, the specific manufacturing process is to 3D print and manufacture the designed digital model of the bowl-shaped dental device. In this method, the design of the digital model of the dental instrument only needs to design the required structure on the model and then print them together in one step during the printing phase without any other processes. The resulting dental instrument has good strength and durability. In some embodiments, the additive manufacturing process may be SLA (stereo lithography appearance) printing or DLP (digital light processing) printing or other 3D printing technologies not listed here.

In some embodiments, the second type protrusion 12 has a rigid structure. The rigid structure is advantageous for reducing the deformation of the dental instrument during occlusion and can increase the rigidity of the dental instrument.

It can be seen that the dental instrument manufactured by 3D printing has simple procedures and good rigidity, which are suitable for various application scenarios.

It is worth mentioning that in addition to integrated dental instruments, split dental instruments can also be used, i.e. the protrusion 12 of the second type is manufactured as a separate component and connected to the shell-shaped body by gluing, welding or clinching.

An embodiment of the present application also provides an orthodontic system including a plurality of sets of dental instruments comprising at least one dental instrument hold as described in one of the previous embodiments.

In some embodiments, multiple sets of dental instruments have a geometry that progressively repositions the teeth from an initial position to a target orthodontic position. In some embodiments, the protrusion height of the second type protrusions 12 protruding toward the opposing jaw on different sets of dental instruments for adjusting the positional relationship between the upper and lower jaws progressively decreases over the course of the orthodontic process. In some embodiments, tooth correction in three phases is used as an example, with different dental instruments being used to correct teeth in each phase. For example, the dental instrument used in the second phase is the dental instrument used after the first phase, and the dental instrument used in the third phase is the dental instrument used after the second phase. The difference between the dental instruments used in the three stages is that the protrusion height of the second type protrusions 12 protruding toward the opposite jaw on the dental instrument used in the second correction stage is lower than the protrusion height of the second type protrusion 12 protruding toward the opposite jaw on the dental instrument used in the first correction stage, and the protrusion height of the second type protrusion 12 protruding toward the opposite jaw on the dental instrument used in the third correction stage is lower than the protrusion height of the second type protrusion 12 protruding toward the opposite jaw on the dental instrument used in the second correction stage. It is worth noting that in orthodontic treatment, a patient needs to wear a series of cup-shaped dental instruments for correction, and the geometric shape rules of these cup-shaped dental instruments can be referred to the above examples. A cup-shaped dental appliance is worn for 7-14 days; and to achieve the desired orthodontic effect, patients are provided with several tray-shaped dental appliances depending on the case type and level of complexity.

The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes may be made to this application. If these changes fall within the scope of the claims and their equivalent technologies of the present application, they still fall within the scope of the present application.

Claims (17)

A dental instrument comprising: a first cup-shaped body (10) configured to receive maxillary teeth and a second cup-shaped body (20) configured to receive mandibular teeth, wherein a buccal side surface or lingual side surface of a posterior region of the first cup-shaped body (10) is provided with a first type protrusion (11), a buccal side surface or lingual side surface of a posterior region of the second cup-shaped body (20) is provided with a position limiting portion (21) that cooperates with the first type protrusion (11), and the first type protrusion (11) and the position limiting portion (21) interact with each other to adjust a relative positional relationship between the upper and lower jaws; an occlusal surface of the posterior region of the first cup-shaped body (10) or the second cup-shaped body (20) is provided with a second type protrusion (12) protruding toward an opposite jaw, and a protrusion height of the second type protrusion (12) compensates for a jaw opening space formed by the interaction of the first type protrusion (11) and the position limiting portion (21) in the posterior region to stabilize an occlusal state. Dental instrument after claim 1 , wherein the first type protrusion (11) extends along a gum-tooth direction toward the second cup-shaped body (20) and at least partially covers the buccal side surface of the second cup-shaped body (20); the position limiting portion (21) extends along the gum-tooth direction toward the first cup-shaped body and at least partially covers the buccal side surface of the first cup-shaped body, a mesial surface (112) of the first type protrusion (11) interacts with a distal surface (211) of the position limiting portion (21) to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction, or a distal surface (211) of the first type protrusion (11) interacts with a mesial surface (112) of the position limiting portion (21) to adjust the relative positional relationship between the upper and lower jaws in the sagittal direction. Dental instrument after claim 1 or 2 , wherein the protrusion of the second type (12) is at least at least one tooth on the cup-shaped body that is located in the jaw opening space. Dental instrument according to one of the Claims 1 until 3 wherein the jaw opening space includes a corresponding space of a second molar, and the second type protrusion (12) covers at least one tooth other than the second molar on the cup-shaped body located in the jaw opening space. Dental instrument according to one of the Claims 1 until 4 , wherein a maximum height of the protrusion of the second type (12) is less than or equal to 4 mm. Dental instrument according to one of the Claims 1 until 5 , wherein a tooth position in which the second type protrusion (12) is arranged is different from a tooth position in which the first type protrusion (11) is arranged. Dental instrument according to one of the Claims 1 until 6 , wherein both the first type protrusion (11) and the second type protrusion (12) are arranged on the first shell-shaped body (10), and the tooth position in which the second type protrusion (12) is arranged is located adjacent to the tooth position in which the first type protrusion (11) is arranged. Dental instrument according to one of the Claims 1 until 7 wherein, when the first cup-shaped body (10) interacts with the second cup-shaped body (20), the occlusal surface of the second type protrusion (12) is in offset engagement with the occlusal surface of the tooth in the corresponding position of the opposite jaw. Dental instrument according to one of the Claims 1 until 8 wherein the second type protrusion (12) is provided with a reinforcing structure to increase the strength of the second type protrusion (12). Dental instrument after claim 9 wherein the reinforcing structure is configured as a reinforcing rib provided on the buccal side surface and/or the lingual side surface of the second type protrusion (12). Dental instrument after claim 9 , wherein the second type protrusion (12) has a hollow structure and the reinforcing structure is a filler body filled into the second type protrusion (12). Dental instrument according to one of the Claims 1 until 11 , wherein the second type protrusion (12) is integrated into the shell-shaped body on which it is located. Dental instrument after claim 12 , wherein the integrated structure is obtained by 3D printing and the second type protrusion (12) is a solid structure. Dental instrument according to one of the Claims 1 until 13 , wherein the second type protrusion (12) is connected to the shell-shaped body by gluing, welding or clinching. An orthodontic system comprising a plurality of sets of dental instruments, wherein the plurality of sets of dental instruments comprise at least one dental instrument according to one of the Claims 1 until 14 include. Orthodontic system according to claim 15 , wherein the multiple sets of dental instruments have a geometry that gradually repositions the teeth from an initial position to an orthodontic target position. Orthodontic system according to claim 15 or 16 , wherein the protrusions of the second type (12) in at least two sets of the dental instruments have different heights along a longitudinal axis direction of the tooth.

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