Adjustable molar retention device and movable appliance using same
By designing an adjustable molar retention device, the combined structure of the gap snap ring and the limiting member is used to solve the problem of insufficient retention force caused by the small crown shape, the three-dimensional retention effect is achieved, and the stability and correction effect of the corrector are improved.
Patent Information
- Application Number
- CN202421159246.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-24
- Publication Date
- 2025-03-07
- Estimated Expiration
- 2034-05-24
AI Technical Summary
The existing movable orthodontic retention devices in the deciduous orthodontic retention device are poor in the retention force during the deciduous or the replacing period due to the small crown morphology or the insufficient crown height, which affects the correction effect.
An adjustable molar retention device is designed, and a combination structure of a gap snap ring, a connecting arm and a limiting member is used to adjust the depth of the retention arm and limiting member of the gap snap ring entering the teeth, and the size of the retention force is adjusted to achieve the three-dimensional retention effect.
This device can effectively overcome the problem of insufficient retention force of traditional retention structures, provide stronger retention effect, improve the stability and correction effect of the correction device, and reduce the correction cycle.
Smart Images
Figure CN222565981U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of oral orthodontic correction, in particular to an adjustable molar retention device and a movable corrector using the same. Background Art
[0002] Malocclusion in the primary dentition and replacement dentition periods accounts for a large proportion of orthodontic clinical work. Children with this type of disease often need two-stage or even multiple-stage treatments to achieve a more ideal treatment effect. Removable appliances are one of the most widely used and effective treatment methods in early treatment. They can stimulate teeth and alveolar bones through appropriate oral and maxillary muscle strength to achieve the treatment goal of promoting maxillary development and craniofacial bone growth. Removable appliances are mainly retained by primary molars, and effective support from anchor teeth is required to provide correction force to the teeth being corrected, thereby achieving the correction goal.
[0003] However, the main retention structures of existing removable orthodontic appliances include single-arm clasps, arrowhead clasps, and compression film retention structures. The above retention structures are difficult to obtain effective retention effects for teeth with short crown shapes. For example, the retention force of the single-arm clasp can only be at the end of the retention arm on the gingival side of the high point of the outer shape of the retaining tooth, which is a point-like retention, lacks the retention effect in the three-dimensional direction, is easy to slide, and has a poor retention effect; the arrowhead clasp is currently the most widely used in clinical practice, but the conventional bent arrowhead clasp has a large error for deciduous molars with short crowns, and it is difficult to bend the steel wire into an arrowhead clasp that fits the crown accurately, which easily leads to the problem of insufficient retention force; the compression film retention structure has weak retention force for teeth with short crowns or poor shapes that lack retention concave, and the material is prone to aging during long-term use, resulting in the braces not fitting, thereby affecting the retention effect. In addition, especially for children in the deciduous dentition period, it is also easy to be affected by the anatomical morphology of the deciduous molars and it is difficult to produce a good retention effect, which makes it difficult for children to cooperate, thereby affecting the correction effect and prolonging the correction period. Utility Model Content
[0004] The utility model aims to provide an adjustable molar retention device and a removable orthodontic appliance using the same, aiming to solve the technical problem that the existing removable orthodontic appliance retention device is prone to poor retention of anchor teeth due to small crown shape or insufficient crown height during the deciduous dentition period and the replacement dentition period.
[0005] To achieve the above-mentioned purpose, the utility model provides an adjustable molar retention device, including a gap clamp ring, which is used to clamp into the gingival side of the high point of the mesiodistal axis angle shape, and at least two gap clamp rings are provided and are spaced apart from each other;
[0006] A connecting arm, through which two adjacent gap clamping rings are connected.
[0007] A limiting member is arranged at the end of the outer side of the gap clamping ring.
[0008] Preferably, the limiting member is spherical.
[0009] Preferably, the gap retaining ring comprises a first retaining arm, a second retaining arm and a third retaining arm, the top ends of the first retaining arm and the third retaining arm are connected through the second retaining arm, and the connecting arm is arranged on the third retaining arm.
[0010] Preferably, the third retaining arm is equally divided into a first section, a second section and a third section connected in sequence according to its length, and the connection point between the connecting arm and the third retaining arm is located on the second section.
[0011] Preferably, the outer wall of the limiting member is also sleeved with a ball cap for increasing the retaining force.
[0012] Preferably, the diameter of the ball cap is 3-5 mm.
[0013] Preferably, the gap clamp, the limiting member and the connecting arm are made of elastic metal material.
[0014] Preferably, the ball cap is made of plastic.
[0015] Preferably, the adjustable molar retention device is arranged at the first (baby) molars and / or the second (baby) molars on both sides of the dental arch.
[0016] In addition, the utility model also provides a removable orthodontic appliance, comprising any of the above-mentioned adjustable molar retention devices.
[0017] The adjustable molar retention device and the movable orthodontic appliance disclosed in the utility model have the following beneficial effects:
[0018] 1. By setting a gap clasp with a limiter made of elastic metal material on the retaining tooth, it is convenient for clinicians to adjust the depth of the retaining arm and the limiter of the gap clasp into the gingival side of the high point of the mesiodistal axis angle of the support tooth, so as to adjust the size of the elastic and mechanical retention force, and it can produce three-dimensional retention force compared with the traditional single-arm clasp; the retention arm of the gap clasp is easy to bend and adjust, which can effectively overcome the shortcomings of the arrow-shaped retention clasp that cannot produce three-dimensional embracing retention force due to inaccurate bending. This adjustable molar retention device has strong operability and convenient adjustment, and effectively compensates for the defects of insufficient retention force and poor retention effect of using traditional metal retention clasps, as well as the risk of poor retention caused by material aging due to long-term use of compression film retention devices, thereby improving the correction effect.
[0019] 2. In addition, when the retaining force of the retaining limiter is still insufficient, a plastic ball cap can be put on the limiter made of elastic metal material to further increase the friction force and elastic clamping force. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0021] Figure 1 This is a schematic diagram of the structure of the adjustable molar retention device of the utility model being fixed on the teeth;
[0022] Figure 2 It is a schematic diagram of the structure of the adjustable molar retention device of the utility model fixed on the teeth at another angle;
[0023] Figure 3 This is a schematic diagram of the structure of the adjustable molar retention device of the utility model;
[0024] Figure 4 This is a schematic structural diagram of one embodiment of the removable orthodontic appliance of the utility model;
[0025] Figure 5 It is a structural schematic diagram of another embodiment of the removable orthodontic appliance of the present invention.
[0026] In the accompanying drawings: 1-gap clasp, 11-first retaining arm, 12-second retaining arm, 13-third retaining arm, 2-tooth, 21-first molar, 22-second deciduous molar, 3-connecting arm, 4-limiting member, 5-gum, 6-first base, 7-hyperbolic tongue reed, 8-second base, 9-spiral expander, 10-hyperbolic lip bow.
[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0029] It should be noted that if a directional indication is involved in the embodiments of the present invention, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0030] In addition, if there are descriptions involving the first, second, etc. in the embodiments of the utility model, the descriptions of the first, second, etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as the first and second may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.
[0031] like Figures 1 to 3 As shown, an adjustable molar retention device comprises a gap clasp 1, which is used to snap into the gingival side of the high point of the mesiodistal axis angle profile, and at least two gap clasps 1 are provided and spaced from each other;
[0032] A connecting arm 3, through which two adjacent gap clamp rings 1 are connected;
[0033] The limiting member 4 is arranged at the end of the outer side of the gap clamp ring 1 .
[0034] The present invention provides a novel adjustable molar retention device, which is mainly composed of a gap clasp 1 and a connecting arm 3. Generally, the adjustable molar retention device is composed of two (mesiodistal) gap clasps 1 and a connecting arm 3. The connecting arm 3 connects the two gap clasps 1 into a whole, and each gap clasp 1 is provided with a limiter 4 at the end close to the cheek side (i.e., the outer side of the gap clasp 1). The working principle of the adjustable molar retention device of the present invention is as follows: the gap clasp 1 with the limiter 4 is placed at the mesiodistal axis angle on the buccal side of the retaining tooth, and the limiter 4 is respectively clamped on the high point of the mesiodistal axis angle of the buccal side of the retaining tooth (gingiva 5) to play a restraining and retaining role, so that the retaining structure and the tooth 2 generate a clamping force. The above structure makes up for the defect of insufficient retention force of the supporting tooth caused by the small crown shape or insufficient crown height of the traditional removable orthodontic appliance retaining components such as single-arm clasp, arrowhead clasp and compression film type, so that the orthodontic appliance is not easy to loosen, and the clinical orthodontic treatment effect is improved.
[0035] The gap clamp 1 and the connecting arm 3 can be an integrated structure or a split fixed structure. The gap clamp 1 and the connecting arm 3 with the limiter 4 can be made using the following two processes: ① Traditional bending method combined with welding technology; ② Integrated production using metal 3D printing technology. The new adjustable molar retention device can be integrated and formed using metal 3D printing technology based on the patient's oral scan data, reducing the workload and error of the technician's bending.
[0036] Furthermore, the limiting member 4 is spherical. When the limiting member 4 is spherical, it can better hold the gingival side of the high point of the mesiodistal axis angle of the buccal side of the retaining tooth to prevent the adjustable molar retention device from falling out. The spherical limiting member 4 is also not easy to damage the gums 5.
[0037] Of course, in other embodiments, the shape of the limiting member 4 may also be other shapes without edges and corners.
[0038] Furthermore, the gap clasp 1 includes a first retaining arm 11, a second retaining arm 12 and a third retaining arm 13, the first retaining arm 11 and the third retaining arm 13 are respectively located on the inner and outer sides of the tooth 2, and the top ends of the first retaining arm 11 and the third retaining arm 13 are connected through the second retaining arm 12, the second retaining arm 12 is clamped in the gap between two adjacent teeth 2, and the connecting arm 3 is arranged on the third retaining arm 13.
[0039] The first retaining arm 11, the second retaining arm 12 and the third retaining arm 13 form a gap clasp 1, the first retaining arm 11 is located on the inner side of the tooth 2 (close to the tongue), the third retaining arm 13 is located on the outer side of the tooth 2 (close to the cheek), the first retaining arm 11 and the second retaining arm 12 are both inclined to the side close to the tooth 2 to better fit the gum 5, the second retaining arm 12 connects the first retaining arm 11 and the third retaining arm 13 to make the gap clasp 1 a whole, and the three are usually integrally formed. The second retaining arm 12 can be in a straight line shape, an arch shape or other shapes, and can be adaptively adjusted in different tooth 2 correction scenarios.
[0040] Of course, in other embodiments, the gap retaining ring 1 may not be the three-section structure consisting of the first retaining arm 11, the second retaining arm 12 and the third retaining arm 13, but may be other shapes.
[0041] like Figure 3 As shown, orthodontic fine wire pliers or needle holders can be used clinically to adjust the depth of the third retaining arm 13 and the limiting member 4 entering the undercut area to achieve the effect of adjusting the retaining force.
[0042] Furthermore, the third retaining arm 13 is divided into a first section, a second section and a third section which are connected in sequence according to its length, and the connection point between the connecting arm 3 and the third retaining arm 13 is located on the second section. Figure 1 or Figure 3 As shown, in this embodiment, the position of the connecting arm 3 is near the middle of the full length of the third retaining arm 13 of the gap retaining ring 1, or the position of the connecting arm 3 is between 1 / 2-1 / 3 of the full length of the third retaining arm 13, so that the connection between the first retaining arm 11 and the second retaining arm 12 is tighter and the restraint and retention effect is better.
[0043] Of course, in other embodiments, the connection arm 3 may be disposed further up or down as long as the restraining and retaining effect is achieved.
[0044] Furthermore, the outer wall of the stopper 4 is also sleeved with a ball cap (not shown in the figure) for increasing the retention force. When the retention force of the stopper 4 of the gap clasp 1 is insufficient, the ball cap can be sleeved on the outside of the stopper 4 to increase the friction force and elastic clamping force of the gap clasp 1. The ball cap can be sleeved on the end of the stopper 4 of the gap clasp 1 as an accessory so as not to compress the mesiodistal gingival papilla of the retaining tooth.
[0045] Furthermore, the diameter of the ball cap is 3-5 mm. The diameter of the ball cap attachment is 3-5 mm, so that it better fits the gap size on the buccal side of the retaining tooth and better increases the retention force.
[0046] Furthermore, the gap clasp 1, the stopper 4 and the connecting arm 3 are made of elastic metal. The gap clasp 1, the stopper 4 and the connecting arm 3 are all made of elastic metal materials, such as Fe-Ni-Cr series, Ni-Ct series, Ni-Cr-Nb series, Ni-Co-Cr series, Nb-Ti series, Fe-Ni-Co series elastic metals, so as to facilitate the adjustment of the depth of the retaining arm of the gap clasp 1 and the stopper 4 entering the gingival side of the high point of the mesiodistal axis angle of the anchoring tooth, so as to adjust the size of the elasticity and mechanical retention force.
[0047] Furthermore, the ball cap is made of plastic material. The plastic ball cap is sleeved on the metal stopper 4, which can increase the friction force and elastic embracing force, and better realize the restraint and retention.
[0048] Furthermore, the adjustable molar retention device is arranged at the first (milk) molar and / or the second (milk) molar on both sides of the dental arch. The adjustable molar retention device of this scheme is generally used on molars, and there are at least two retaining teeth, preferably the second milk molars or the first molars 21 on both sides. For children in the primary dentition period, the adjustable molar retention device is conventionally arranged at the second milk molars or the first milk molars on both sides; for children in the replacement dentition period, it can also be arranged at the first molar 21 or the second molar.
[0049] Of course, in some special cases, the adjustable molar retention device of this solution can also be set on other teeth 2, or on multiple teeth 2 at the same time.
[0050] In addition, the utility model also provides a removable orthodontic appliance, comprising any of the above-mentioned adjustable molar retention devices.
[0051] Specific embodiment 1 of the movable appliance:
[0052] like Figure 4As shown, a tongue spring appliance with the above-mentioned adjustable molar retention device as a retention structure includes an adjustable molar retention device, a first base 6 and a hyperbolic tongue spring 7, two gap clasps 1 of the adjustable molar retention device are respectively arranged at the mesiodistal axis angle of the second deciduous molar, and the metal limiter 4 at the end of the third retention arm 13 is arranged at the concave part of the mesiodistal axis angle of the second deciduous molar, and the other end thereof is connected to the first base 6 to form a whole with the appliance; the hyperbolic tongue spring 7 is bent from a stainless steel wire with a diameter of 0.3-0.6 mm, the functional end of which contacts the inner side of the front teeth, and the other end of which is connected to the first base 6 to form a whole with the appliance; when the tongue spring appliance is placed in the dental arch, the adjustable molar retention devices on both sides of the dental arch are adjusted to tightly hold the second deciduous molar to play a retention and support role, and at the same time, the hyperbolic tongue spring 7 in the front teeth area is adjusted to a compressed state to produce deformation, thereby generating a correction force on the front teeth area and exerting the function of the tongue spring appliance.
[0053] In addition, most patients with anterior crossbite need to open their bite at the same time during correction. In this embodiment, a resin bite pad can be set on the patient's dental arch retaining teeth.
[0054] Specific embodiment 2 of the movable appliance:
[0055] like Figure 5 As shown, a maxillary active spiral expansion appliance with the above-mentioned adjustable molar retention device as a retention structure includes an adjustable molar retention device, a second base 8, a spiral expander 9 and a hyperbolic lip bow 10, two gap clasps 1 of the adjustable molar retention device are respectively arranged at the mesiodistal axis angle of the first molar 21, a metal stopper 4 at the end of the third retention arm 13 of the gap clasp 1 is arranged at the mesiodistal axis angle of the first permanent molar (first molar 21) The other end is connected to the second base 8 and connected to the appliance as a whole; the hyperbolic lip bow 10 is made of stainless steel wire with a diameter of 0.6-0.9mm and is arranged at Between the labial sides of the bilateral canines, the second base 8 is connected to the appliance as a whole; the spiral expander 9 is set in the center of the second base 8 on the palatal side, the midpoint of the line connecting the bilateral premolar areas; when the expansion appliance is placed in the dental arch, the adjustable molar retention devices on both sides of the dental arch are adjusted to tightly hold the first permanent molar, playing a role in retention and support, and at the same time, the central adjustment hole of the spiral expander 9 is rotated to apply force, and the force is transmitted to the jaw and teeth 2 through the second base 8, and the effect of expanding the arch is achieved by expanding the mid-palatal suture and buccal tilting of the posterior teeth; at the same time, the hyperbolic lip arch 10 set on the labial side of the anterior teeth area is adjusted to apply force and tighten, so as to retract the anterior teeth and close the anterior teeth gap.
[0056] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. An adjustable molar retention device, characterized in that: include: A gap snap ring (1) is used to snap into the gingival side of the high point of the mesiodistal axis angle profile, and at least two of the gap snap rings (1) are provided and are spaced apart from each other; A connecting arm (3), wherein two adjacent gap clamping rings (1) are connected via the connecting arm (3); A limiting member (4) is arranged at the end of the outer side of the gap clamp ring (1).
2. The adjustable molar retention device according to claim 1, characterized in that: The limiting member (4) is spherical.
3. The adjustable molar retention device according to claim 1, characterized in that: The gap snap ring (1) comprises a first retaining arm (11), a second retaining arm (12) and a third retaining arm (13); the top ends of the first retaining arm (11) and the third retaining arm (13) are connected via the second retaining arm (12); and the connecting arm (3) is arranged on the third retaining arm (13).
4. The adjustable molar retention device according to claim 3, characterized in that: The third retaining arm (13) is equally divided into a first section, a second section and a third section which are connected in sequence according to its length, and the connection point between the connecting arm (3) and the third retaining arm (13) is located on the second section.
5. The adjustable molar retention device according to claim 1, characterized in that: The outer wall of the limiting member (4) is also sleeved with a ball cap for increasing the retaining force.
6. The adjustable molar retention device according to claim 5, characterized in that: The diameter of the ball cap is 3-5 mm.
7. The adjustable molar retention device according to claim 1, characterized in that: The gap clamp ring (1), the limiting member (4) and the connecting arm (3) are made of elastic metal material.
8. The adjustable molar retention device according to claim 6, characterized in that: The ball cap is made of plastic.
9. A removable orthodontic appliance, characterized in that: The invention comprises the adjustable molar retention device according to any one of claims 1 to 8.