Dental instrument
By designing dental devices including maxillary and mandibular shell-shaped dental instruments and jaw position adjustment parts, the problem of concentrated force application when adjusting the jaw position is solved, achieving greater force correction effect and more stable tooth position.
Patent Information
- Application Number
- CN202421688557.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-07-17
AI Technical Summary
When adjusting the jaw position, the force is applied to the teeth that fix the corrector, which may cause undesirable movement of the teeth. The force applied must be limited when designed, which will affect the treatment effect.
A dental instrument is designed, including maxillary and mandibular shell-shaped dental instruments and jaw position adjustment parts. Through the U-shaped structure and barrier characteristics of the jaw position adjustment parts, the position of the jaw position relative to the jaw is adjusted to avoid stress concentration.
It is achieved that greater force is applied to the jaw while avoiding the tooth's stress concentration, which improves the correction effect and reduces undesirable changes in the tooth position.
Smart Images
Figure CN222983185U_ABST
Abstract
Description
Technical Field
[0001] The utility model generally relates to a dental instrument, and more particularly to a dental instrument capable of adjusting the position of the mandible. Background Art
[0002] At present, for more than 80% of patients with skeletal class II malocclusion, the maxilla is normal and the mandible is retruded. Functional appliances are an important means to promote the development of the mandible and correct mandibular retrusion at an early stage. Although traditional MARA appliances and Herbst appliances have significant therapeutic effects in this regard, since they are directly fixed to single teeth, on the one hand, this causes the force exerted by the appliance to be concentrated on the teeth to which the fixed appliance is attached, which may lead to unwanted movement of these teeth. On the other hand, to avoid the above situation, the magnitude of the force exerted by the appliance is restricted during the design of the appliance, which will affect the therapeutic effect.
[0003] In view of the above, it is necessary to provide a new dental instrument capable of adjusting the position of the mandible. Summary of the Utility Model
[0004] One aspect of the utility model provides a dental instrument, which includes: a first shell-shaped dental instrument, which is an integral shell and forms a cavity for accommodating the first dentition of a patient. The first shell-shaped dental instrument is provided with a protruding first blocking feature on a first side wall, and a through hole is formed on the first blocking feature. Wherein, the first dentition is the maxillary dentition or the mandibular dentition, and the first side wall is the lingual side wall or the buccal side wall; a second shell-shaped dental instrument, which is an integral shell and forms a cavity for accommodating the second dentition of the patient. The second shell-shaped dental instrument is provided with a protruding second blocking feature on the side wall on the same side as the first side wall. Wherein, the second dentition is the antagonist dentition of the first dentition; and a jaw position adjusting member, which is generally U-shaped. One end thereof forms a sliding rod, which is inserted into the through hole, and the other end extends towards the antagonist direction to form a blocking portion, which abuts against the side of the second blocking feature close to the first blocking feature. The jaw position adjusting member makes the distance between the first and second blocking features in the horizontal direction not less than a predetermined distance to adjust the position of the patient's mandible relative to the maxilla in the anteroposterior direction.
[0005] In some embodiments, the predetermined distance is determined by the length of the bottom of the U-shape.
[0006] In some embodiments, the included angle between the extending direction of the through hole and the vertical direction is less than 30 degrees.
[0007] In some embodiments, the cross-sectional shapes and sizes of the through hole and the sliding rod are such that the rotation of the sliding rod relative to the through hole is restricted within a predetermined range to prevent the blocking portion from being misaligned with the second blocking feature.
[0008] In some embodiments, a hook portion is provided at a position of the jaw position adjusting member away from the free end of the sliding rod, and an elastic band is suspended between the hook portion and one end of the sliding rod extending out of the through hole to hold the jaw position adjusting member above the first shell-shaped dental instrument.
[0009] In some embodiments, the jaw position adjusting member is formed by bending a metal wire.
[0010] In some embodiments, the first and second blocking features are respectively fixed to the first and second shell-shaped dental instruments by bonding.
[0011] In some embodiments, the jaw position adjusting member is detachable relative to the first and second shell-shaped dental instruments.
[0012] In some embodiments, the first shell-shaped dental instrument and / or the second shell-shaped dental instrument is a shell-shaped tooth aligner capable of repositioning the first dental arch and / or the second dental arch from the current tooth layout to a desired tooth layout. Brief Description of the Drawings
[0013] The above and other features of the present application will be further described below in conjunction with the accompanying drawings and their detailed descriptions. It should be understood that these drawings only show several exemplary embodiments according to the present application, and thus should not be regarded as limiting the protection scope of the present application. Unless otherwise specified, the drawings do not have to be to scale, and like reference numerals represent like components.
[0014] Figure 1A Schematically shows a dental instrument in an embodiment of the present application; and
[0015] Figure 1B Schematically shows Figure 1A the assembly relationship between the components of the shown dental instrument. Detailed Description of the Embodiments
[0016] The following detailed description refers to the accompanying drawings that form a part of this specification. The illustrative embodiments mentioned in the specification and the drawings are for illustrative purposes only and are not intended to limit the protection scope of the present application. Under the inspiration of the present application, those skilled in the art can understand that many other embodiments can be adopted, and various changes can be made to the described embodiments without departing from the gist and protection scope of the present application. It should be understood that the various aspects of the present application described and illustrated herein can be arranged, replaced, combined, separated, and designed in many different configurations, and these different configurations are all within the protection scope of the present application.
[0017] One aspect of the present utility model provides a dental instrument, which includes an upper shell-shaped dental instrument, a lower shell-shaped dental instrument, and a lower jaw position adjustment mechanism. The lower jaw position adjustment mechanism is arranged on the sides of the upper and lower shell-shaped dental instruments. Through such an arrangement, the forces and reaction forces for adjusting the position of the lower jaw in the front-rear direction are more evenly distributed to each lower tooth and upper tooth through the upper and lower shell-shaped dental instruments. This enables a greater force to be applied to the lower jaw on the premise of avoiding unwanted movement of the teeth under stress.
[0018] Please refer Figure 1A-1B , wherein, Figure 1A schematically shows a dental instrument 200 in an embodiment of the present application, Figure 1B schematically shows Figure 1A the assembly relationship between the components of the shown dental instrument 200.
[0019] The dental instrument 200 is used for leading the lower jaw forward, and it includes an upper shell-shaped dental instrument 201, a lower shell-shaped dental instrument 203, and a jaw position adjustment member 205.
[0020] The upper shell-shaped dental instrument 201 is an integral shell, forming a cavity 2011 for accommodating the upper dental arch of the patient. The upper shell-shaped dental instrument 201 is fixedly provided with a protruding blocking feature 2013 on the buccal side of the posterior tooth area, and a through hole 2015 is formed thereon.
[0021] The lower shell-shaped dental instrument 203 is an integral shell, forming a cavity 2031 for accommodating the upper dental arch of the patient. The lower shell-shaped dental instrument 203 is fixedly provided with a protruding blocking feature 2033 on the buccal side of the posterior tooth area.
[0022] The jaw position adjustment member 205 is generally U-shaped. Its first end forms a sliding rod 2051, which is inserted into the through hole 2015. The second end of the jaw position adjustment member 205 is a blocking portion 2053, which abuts against one side of the blocking feature 2033 close to the blocking feature 2013. The dental instrument 200 positions the lower jaw at a predetermined position by limiting the sliding rod 2051 in the horizontal direction through the through hole 2015 and blocking the blocking portion 2053 by the blocking feature 2033. The amount of forward guidance of the lower jaw by the dental instrument 200 is determined by the length of the bottom of the U-shape of the jaw position adjustment member 205 or the distance between the two ends of the U-shape.
[0023] In Figure 1A-1B the shown embodiment, the through hole 2015 extends substantially in the vertical direction, but it can be understood that it can also form an angle with the vertical direction, as long as it does not affect the disassembly and assembly of the jaw position adjustment member 205 and the function of the dental instrument 200 (leading the lower jaw forward). In one embodiment, the angle between the extending direction of the through hole 2015 and the vertical direction is less than 30 degrees.
[0024] The jaw position adjusting member 205 forms a hook portion 2057 at a position on the sliding rod 2051 away from the free end. The dental instrument 200 further includes an elastic band 2059, which is suspended between a section of the sliding rod 2051 extending out of the through hole 2015 and the hook portion 2057 to fix the jaw position adjusting member 205 to the upper shell-shaped dental instrument 201, thereby preventing the jaw position adjusting member 205 from falling off the upper shell-shaped dental instrument 201 during the wearing and use of the dental instrument 200.
[0025] In one embodiment, the cross-sectional shapes and sizes of the through hole 2015 and the sliding rod 2051 are such that the rotation of the sliding rod 2051 relative to the through hole 2015 is restricted, that is, the angular range within which the sliding rod 2051 can rotate is small enough to prevent the blocking portion 2053 from being misaligned with the blocking feature 2033 due to the rotation of the sliding rod 2051 relative to the through hole 2015. For example, the cross-sectional shapes of the through hole 2015 and the sliding rod 2051 can be rectangular, triangular, elliptical, etc.
[0026] In the above embodiments, the jaw position adjusting member 205 is detachable, and the dental instrument 200 is easy to install and disassemble, facilitating the patient to use the dental instrument 200 in different modes according to needs. For example, in order not to affect the opening and closing of the upper and lower jaws, the patient can remove the jaw position adjusting member 205 and only wear the upper shell-shaped dental instrument 201 and the lower shell-shaped dental instrument 203. If both are shell-shaped tooth aligners, they can still play a role in adjusting the pose of the corresponding teeth during wearing. When the upper and lower jaws do not need to open and close during sleep, the complete dental instrument 200 can be worn at this time to adjust the lower jaw position simultaneously. In this way, the impact of the use of the dental instrument 200 on the patient's daily life is minimized to the greatest extent. This setting is particularly suitable for situations where both tooth pose adjustment and lower jaw position adjustment are required.
[0027] It can be understood that if the upper shell-shaped dental instrument 201 and the lower shell-shaped dental instrument 203 are shell-shaped tooth aligners, the geometric shapes of their tooth receiving cavities are such that they can reposition the patient's upper and lower dental arches from the current tooth layout to the desired tooth layout by adjusting the pose of the teeth.
[0028] In Figure 1A In the illustrated embodiment, the dental instrument 200 is for leading the lower jaw forward. Therefore, the blocking feature 2013 is located distally to the blocking feature 2033, or in other words, the blocking feature 2013 is located behind the blocking feature 2033.
[0029] It can be understood that if it is for guiding the lower jaw backward, then the blocking feature 2013 should be located mesially to the blocking feature 2033, or in other words, the blocking feature 2013 is located in front of the blocking feature 2033.
[0030] A through-hole may also be formed on the blocking feature of the lower jaw shell-shaped dental instrument. At this time, the sliding rod 2051 of the jaw position adjusting member 205 is inserted into the through-hole of the blocking feature of the lower jaw shell-shaped dental instrument, and the blocking portion 2053 abuts against the blocking feature of the upper jaw shell-shaped dental instrument.
[0031] In one embodiment, the blocking feature 2013 and the blocking feature 2033 may be separately manufactured elements, and are respectively fixed to the upper jaw shell-shaped dental instrument 201 and the lower jaw shell-shaped dental instrument 203 by means such as bonding, welding, and fusing.
[0032] In another embodiment, the blocking feature 2013 and the blocking feature 2033 may also be integrally formed with the upper jaw shell-shaped dental instrument 201 and the lower jaw shell-shaped dental instrument 203 respectively. For example, when manufacturing the upper jaw shell-shaped dental instrument 201 and the lower jaw shell-shaped dental instrument 203 using thermoforming film technology or 3D printing technology, they are integrally formed therewith.
[0033] The jaw position adjusting member 205 may be made of metal, polymer, or composite material. In one embodiment, the jaw position adjusting member 205 may be obtained by bending a metal wire (for example, an arch wire commonly used in the dental field). In another embodiment, the jaw position adjusting member 205 may also be formed by stamping a metal material.
[0034] Although, in the above schematic embodiments, the blocking feature and the jaw position adjusting member are provided on the buccal sides of the upper and lower jaw shell-shaped dental instruments, it can be understood that they can also be provided on the lingual sides of the upper and lower jaw shell-shaped dental instruments.
[0035] Although, in the above schematic embodiments, only the blocking features and the jaw position adjusting members on one side are shown, it can be understood that a more preferred implementation is to provide the blocking features and the jaw position adjusting members on both the left and right sides of the upper and lower jaw shell-shaped dental instruments.
[0036] Although multiple aspects and embodiments of the present application are disclosed herein, other aspects and embodiments of the present application will be obvious to those skilled in the art inspired by the present application. Each of the aspects and embodiments disclosed herein is for illustrative purposes only, not for limiting purposes. The scope of protection and the gist of the present application are determined only by the appended claims.
[0037] Similarly, each diagram may show an exemplary architecture or other configuration of the disclosed method and system, which helps to understand the features and functions that may be included in the disclosed method and system. The claimed subject matter is not limited to the shown exemplary architecture or configuration, and the desired features may be implemented with various alternative architectures and configurations. In addition, for flowcharts, functional descriptions, and method claims, the order of the boxes given here should not be limited to the order in which various embodiments are implemented to perform the functions, unless explicitly stated in the context.
[0038] Unless otherwise expressly indicated, the terms and phrases used herein and their variants shall be construed as open-ended and not limiting. In some instances, the presence of expansive words and phrases such as "one or more", "at least", "but not limited to" or other similar expressions should not be construed as intending or requiring a narrowing in instances where such expansive language may be absent.
Claims
1. A dental instrument, characterized in that: It includes: A first shell-shaped dental appliance, which is an integral shell and forms a cavity for accommodating a first dentition of a patient, wherein a first protruding blocking feature is provided on a first side wall of the first shell-shaped dental appliance, and a through hole is formed on the first blocking feature, wherein the first dentition is a maxillary dentition or a mandibular dentition, and the first side wall is a lingual wall or a buccal wall; a second shell-shaped dental appliance, which is an integral shell and forms a cavity for accommodating the second dentition of the patient, wherein the second shell-shaped dental appliance is provided with a protruding second blocking feature on a side wall on the same side as the first side wall, wherein the second dentition is the dentition opposing the first dentition; and The jaw position adjustment member is roughly U-shaped, with one end forming a sliding rod inserted into the through hole, and the other end extending toward the opposite jaw direction to form a blocking portion, which abuts against the side of the second blocking feature close to the first blocking feature. The jaw position adjustment member makes the horizontal distance between the first and second blocking features not less than a predetermined distance, so as to adjust the position of the patient's lower jaw relative to the upper jaw along the front-to-back direction.
2. The dental apparatus according to claim 1, wherein: The predetermined distance is determined by the length of the U-shaped bottom.
3. The dental apparatus according to claim 1, wherein: The angle between the extending direction of the through hole and the vertical direction is less than 30 degrees.
4. The dental apparatus according to claim 1, wherein: The cross-sectional shapes and sizes of the through hole and the sliding rod limit the rotation of the sliding rod relative to the through hole within a predetermined range, so as to prevent the blocking portion from being misaligned with the second blocking feature.
5. The dental apparatus according to claim 1, wherein: The jaw position adjusting member is provided with a hook portion at a position away from the free end of the sliding rod, and a rubber band is suspended between the hook portion and one end of the sliding rod extending out of the through hole to keep the jaw position adjusting member on the first shell-shaped dental appliance.
6. The dental apparatus according to claim 1, wherein: The jaw position adjusting member is formed by bending a metal wire.
7. The dental apparatus according to claim 1, wherein: The first and second blocking features are fixed to the first and second shell-shaped dental appliances, respectively, by bonding.
8. The dental apparatus according to claim 1, wherein: The jaw position adjusting member is detachable relative to the first and second shell-shaped dental appliances.
9. The dental apparatus according to claim 1, wherein: The first shell-shaped dental appliance and / or the second shell-shaped dental appliance is a shell-shaped dental appliance capable of repositioning the first dentition and / or the second dentition from a current tooth configuration to a desired tooth configuration.