Dental instrument
By designing the maxillary and mandibular shell-shaped dental instruments and jaw position adjustment parts of dental instruments, the problems of focus and design limitations when adjusting the mandible position are solved, achieving greater force jaw adjustment and better treatment effects.
Patent Information
- Application Number
- CN202421703108.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2034-07-17
AI Technical Summary
When adjusting the jaw position, the force is concentrated on the teeth that fix the corrector, which may cause the teeth to move, and the design limits the amount of force applied, affecting the treatment effect.
A dental instrument is designed, including maxillary and mandibular shell-shaped dental instruments and jaw position adjustment members. Through the coordination of the sliding rod and the barrier feature, the position of the jaw relative to the maxillary is adjusted to ensure the even distribution of torque.
It is achieved that while avoiding the teeth from undesiring to move, the jaw is applied to improve the treatment effect, and the impact on the patient's daily life is reduced.
Smart Images
Figure CN222899347U_ABST
Abstract
Description
Technical Field
[0001] The present 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] Currently, 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 mandibular development for early correction of mandibular retrusion. 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 cause unwanted movement of these teeth. On the other hand, to avoid the above situation, the magnitude of the force exerted by the appliance is limited 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 present 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 opposing dentition of the first dentition; and a jaw position adjusting member, one end of which forms a sliding rod, which is inserted into the through hole, and extends in the direction of the opposing jaw away from the free end of the sliding rod 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 sliding rod is provided with a limiting feature to block the further entry of the sliding rod into the through hole, so that the distance between the first and second blocking features in the horizontal direction is not less than the predetermined distance.
[0006] In some embodiments, the limiting feature is a sleeve, and its cross-sectional shape and / or size prevent it from entering the through hole.
[0007] In some embodiments, the sleeve can slide along the sliding rod.
[0008] In some embodiments, the angle between the extending direction of the through hole and the horizontal plane is less than 30 degrees.
[0009] In some embodiments, the cross-sectional shapes and dimensions 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.
[0010] In some embodiments, 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 the 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.
[0011] In some embodiments, the jaw position adjusting member is formed by bending a wire.
[0012] In some embodiments, the first blocking feature and the second blocking feature are respectively fixed to the first and second shell-shaped dental instruments by an adhesive means.
[0013] In some embodiments, the jaw position adjusting member is detachable relative to the first and second shell-shaped dental instruments.
[0014] 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
[0015] The above and other features of the present application will be further described below in conjunction with the drawings and their detailed descriptions. It should be understood that these drawings only show several exemplary embodiments of the present application and 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.
[0016] Figure 1A Schematically shows a dental instrument in an embodiment of the present application;
[0017] Figure 1B Schematically shows Figure 1A the assembly relationship between the components of the shown dental instrument;
[0018] Figure 2A Schematically shows a dental instrument in another embodiment of the present application; and
[0019] Figure 2B Schematically shows Figure 2A the assembly relationship between the components of the shown dental instrument. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] In the following detailed description, reference is made to the accompanying drawings which 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 scope of protection of this application. Under the inspiration of this 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 scope of protection of this application. It should be understood that the various aspects of this 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 scope of protection of this application.
[0021] 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 disposed on the side surfaces of the upper and lower shell-shaped dental instruments. Through such a setting, the force and reaction force for adjusting the lower jaw position in the front-rear direction are more evenly distributed to each lower jaw tooth and upper jaw 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 force.
[0022] Please refer Figure 1A - 1B , wherein, Figure 1A schematically shows the dental instrument 100 in an embodiment of this application, Figure 1B schematically shows Figure 1A the assembly relationship between the components of the shown dental instrument 100.
[0023] The dental instrument 100 is used to lead the lower jaw forward, and it includes an upper shell-shaped dental instrument 101, a lower shell-shaped dental instrument 103, and a jaw position adjustment member 105.
[0024] The upper shell-shaped dental instrument 101 is an integral shell, forming a cavity 1011 for accommodating the upper dental arch of the patient. The upper shell-shaped dental instrument 101 is fixedly provided with a protruding blocking feature 1013 on the buccal side of the posterior tooth area, and a through hole 1015 is formed thereon.
[0025] The lower shell-shaped dental instrument 103 is an integral shell, forming a cavity 1031 for accommodating the upper dental arch of the patient. The lower shell-shaped dental instrument 103 is fixedly provided with a protruding blocking feature 1033 on the buccal side of the posterior tooth area.
[0026] The first end of the jaw adjustment member 105 forms a sliding rod 1051, which is inserted into the through hole 1015. The second end of the jaw adjustment member 105 opposite to the first end extends toward the jaw to form a blocking portion 1053, which abuts against the side of the blocking feature 1033 close to the blocking feature 1013. The sliding rod 1051 is provided with a limiting feature 1055, which is located between the blocking feature 1013 and the blocking feature 1033, so that the sliding rod 1051 cannot be further inserted into the through hole 1015, thereby maintaining a predetermined distance between the blocking portion 1053 and the blocking feature 1013.
[0027] In one embodiment, the stop feature 1055 can be a sleeve, whose outer dimension is larger than the inner dimension of the through hole 1015. The sleeve can slide on the sliding rod 1051, so that a sleeve of corresponding length can be selected according to specific needs, which significantly expands the application range and flexibility of the dental apparatus 100. In this embodiment, the mandibular advancement amount is determined by the length of the sleeve.
[0028] In another embodiment, the limiting feature 1055 may also be a fixed limiting feature formed at a predetermined position on the sliding rod 1051 to prevent the sliding rod 1051 from being further inserted into the through hole 1015, thereby maintaining the distance between the blocking feature 1013 and the blocking feature 1033 in the front-to-back direction at a predetermined distance. For example, the limiting feature 1055 may be a blocking block wrapping the sliding rod 1051, or a limiting feature formed by bending the sliding rod 1051, or a limiting feature formed by extending laterally from the sliding rod 1051, etc. In this case, the mandibular advancement amount is determined by the position of the limiting feature 1055 on the sliding rod 1051.
[0029] The jaw adjustment member 105 forms a hook portion 1057 at the free end away from the sliding rod 1051. The dental instrument 100 also includes a rubber band 1059, which is suspended on a section of the sliding rod 1051 extending out of the through hole 1015 and the hook portion 1057 to fix the jaw adjustment member 105 to the maxillary shell-shaped dental instrument 101, thereby preventing the jaw adjustment member 105 from falling off from the maxillary shell-shaped dental instrument 101 during the wearing and use of the dental instrument 100.
[0030] In one embodiment, the cross-sectional shapes and sizes of the through hole 1015 and the sliding rod 1051 limit the rotation of the sliding rod 1051 relative to the through hole 1015, that is, the angular range in which the sliding rod 1051 can rotate is small enough to prevent the blocking portion 1053 from being offset from the blocking feature 1033 due to the rotation of the sliding rod 1051 relative to the through hole 1015. For example, the cross-sectional shapes of the through hole 1015 and the sliding rod 1051 may be rectangular, triangular, elliptical, etc.
[0031] In the above embodiments, the jaw position adjusting member 105 is detachable, and the installation and disassembly of the dental instrument 100 are simple, facilitating the patient to use the dental instrument 100 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 105 and only wear the upper shell-shaped dental instrument 101 and the lower shell-shaped dental instrument 103. If both are shell-shaped tooth aligners, then, during wearing, they can still play a role in adjusting the positions and postures of the corresponding teeth. When the upper and lower jaws do not need to open and close during sleep, at this time, the complete dental instrument 100 can be worn to adjust the position of the lower jaw at the same time. In this way, the impact of the use of the dental instrument 100 on the patient's daily life is minimized to the greatest extent. This setting is particularly applicable to the situation where both the tooth position and posture need to be adjusted and the position of the lower jaw needs to be adjusted.
[0032] It can be understood that if the upper shell-shaped dental instrument 101 and the lower shell-shaped dental instrument 103 are shell-shaped tooth aligners, the geometric shapes of their tooth receiving cavities enable them to reposition the patient's upper dental arch and lower dental arch from the current tooth layout to the desired tooth layout by adjusting the positions and postures of the teeth.
[0033] In Figure 1A In the illustrated embodiment, the dental instrument 100 is for leading the lower jaw forward. Therefore, the blocking feature 1013 is located distally to the blocking feature 1033, or rather, the blocking feature 1013 is located behind the blocking feature 1033.
[0034] It can be understood that if it is for leading the lower jaw backward, then, the blocking feature 1013 should be located mesially to the blocking feature 1033, or rather, the blocking feature 1013 is located in front of the blocking feature 1033.
[0035] The through hole can also be formed on the blocking feature of the lower shell-shaped dental instrument. At this time, the sliding rod 1051 of the jaw position adjusting member 105 is inserted into the through hole of the blocking feature of the lower shell-shaped dental instrument, and the blocking portion 1053 abuts against the blocking feature of the upper shell-shaped dental instrument.
[0036] In Figure 1A - 1B In the illustrated embodiment, the through hole 1015 extends substantially in the horizontal direction. However, it can be understood that it can also form an angle with the horizontal direction, as long as it does not affect the disassembly and assembly of the jaw position adjusting member 105 and the function of the dental instrument 100 (leading the lower jaw forward). In one embodiment, the angle between the extending direction of the through hole 1015 and the horizontal direction is less than 30 degrees.
[0037] In one embodiment, the blocking feature 1013 and the blocking feature 1033 can be independently manufactured elements, and are respectively fixed to the upper shell-shaped dental instrument 101 and the lower shell-shaped dental instrument 103 by means of bonding, welding, fusing, etc.
[0038] In another embodiment, the blocking feature 1013 and the blocking feature 1033 may also be formed integrally with the maxillary shell-shaped dental appliance 101 and the mandibular shell-shaped dental appliance 103, respectively. For example, they may be formed integrally with the maxillary shell-shaped dental appliance 101 and the mandibular shell-shaped dental appliance 103 when they are manufactured using hot pressing film molding technology or 3D printing technology.
[0039] The jaw adjustment member 105 can be made of metal, polymer or composite material. In one embodiment, the jaw adjustment member 105 can be made by bending a metal wire (e.g., an arch wire commonly used in the dental field). In another embodiment, the jaw adjustment member 105 can also be formed by stamping a metal material.
[0040] Please refer to Figure 2A - 2B ,in, Figure 2A The dental apparatus 200 in another embodiment of the present application is schematically shown. Figure 2B Schematically shows Figure 2A The assembly relationship between the various components of the dental apparatus 200 is shown.
[0041] The dental appliance 200 is also used for advancing the mandible, and comprises an upper shell-shaped dental appliance 201 , a lower shell-shaped dental appliance 203 , and a jaw position adjusting member 205 .
[0042] The maxillary shell-shaped dental appliance 201 is an integral shell, forming a cavity 2011 for accommodating the maxillary dentition of the patient. The maxillary shell-shaped dental appliance 201 is fixedly provided with a protruding blocking feature 2013 on the buccal side of the posterior teeth area, and a through hole 2015 is formed thereon.
[0043] The mandibular shell-shaped dental appliance 203 is an integral shell, forming a cavity 2031 for accommodating the patient's maxillary dentition. The mandibular shell-shaped dental appliance 203 is fixedly provided with a protruding blocking feature 2033 on the buccal side of the posterior tooth area.
[0044] The jaw adjustment member 205 is roughly U-shaped, and the first end thereof forms a sliding rod 2051, which is inserted into the through hole 2015. The second end of the jaw adjustment member 205 is a blocking portion 2053, which abuts against the side of the blocking feature 2033 close to the blocking feature 2013. The dental instrument 200 keeps 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 leading amount of the lower jaw by the dental instrument 200 is determined by the length of the U-shaped bottom of the jaw adjustment member 205 or the distance between the two ends of the U-shaped.
[0045] exist Figure 2A - 2BIn the illustrated embodiment, the through-hole 2015 extends substantially in the vertical direction. However, it can be understood that it may also form an angle with the vertical direction, as long as it does not affect the disassembly and assembly of the jaw position adjusting member 205 and the function of the dental instrument 200 (leading the mandible). In one embodiment, the angle between the extending direction of the through-hole 2015 and the vertical direction is less than 30 degrees.
[0046] The jaw position adjusting member 205 forms a hook portion 2057 at a position away from the free end of the sliding rod 2051. 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 jaw shell-shaped dental instrument 201, thereby preventing the jaw position adjusting member 205 from falling off the upper jaw shell-shaped dental instrument 201 during the wearing and use of the dental instrument 200.
[0047] 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.
[0048] Although, in the above illustrative embodiments, the blocking feature and the jaw position adjusting member are provided on the buccal side of the upper and lower jaw shell-shaped dental instruments, it can be understood that they can also be provided on the lingual side of the upper and lower jaw shell-shaped dental instruments.
[0049] Although, in the above illustrative embodiments, only the blocking feature and the jaw position adjusting member on one side are shown, it can be understood that a more preferred embodiment is to provide the blocking feature and the jaw position adjusting member on both the left and right sides of the upper and lower jaw shell-shaped dental instruments.
[0050] 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. The various aspects and embodiments disclosed herein are 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.
[0051] Similarly, the various diagrams may illustrate exemplary architectures or other configurations of the disclosed methods and systems, which facilitate understanding of the features and functions that may be included in the disclosed methods and systems. The claimed subject matter is not limited to the illustrated exemplary architectures or configurations, and the desired features may be implemented with a variety of alternative architectures and configurations. In addition, for flowcharts, functional descriptions, and method claims, the order of the blocks given herein should not be limited to the various embodiments implementing the functions in the same order, unless explicitly stated otherwise in the context.
[0052] Unless otherwise expressly indicated, the terms and phrases used herein and their variants shall be construed as open-ended rather than 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 indicating a narrowing intention or requirement in examples 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 has a sliding rod formed at one end and inserted into the through hole, and extends toward the opposite jaw away from the free end of the sliding rod 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: A limiting feature is provided on the sliding rod to prevent the sliding rod from further entering the through hole, so that the distance between the first and second blocking features in the horizontal direction is not less than the predetermined distance.
3. The dental apparatus according to claim 2, wherein: The stop feature is a sleeve whose cross-sectional shape and / or size prevents it from entering the through hole.
4. The dental apparatus according to claim 3, wherein: The sleeve is slidable along the sliding rod.
5. The dental apparatus according to claim 2, wherein: The angle between the extending direction of the through hole and the horizontal plane is less than 30 degrees.
6. 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.
7. 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.
8. The dental apparatus according to claim 1, wherein: The jaw position adjusting member is formed by bending a metal wire.
9. The dental apparatus according to claim 1, wherein: The first blocking feature and the second blocking feature are respectively fixed to the first and second shell-shaped dental appliances in an adhesive manner.
10. 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.
11. 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.