阅读说明：本技术 可摘式牙齿矫正装置 (Removable orthodontic device ) 是由 洪澄祥 于 2019-06-21 设计创作，主要内容包括：本发明公开一种可摘式牙齿矫正装置,包括锚固牙套段部、移动牙套段部、一对弹簧元件以及引导线。锚固牙套段部以可摘方式配戴在牙弓的前牙上。移动牙套段部以可摘方式配戴在牙弓的一侧的至少一后牙上。弹簧元件设置在锚固牙套段部与移动牙套段部之间,用以产生弹性回弹力以相对于锚固牙套段部移动移动牙套段部。引导线具有U形部分及两个杆部分,其中U形部分嵌入于并且围绕移动牙套段部的三个侧壁设置,并且杆部分收容在形成于锚固牙套段部的颊侧及舌侧侧壁内的引导通道中以引导移动牙套段部的移动。(A removable orthodontic device includes an anchoring shell segment, a moving shell segment, a pair of spring elements, and a guide wire. The anchoring shell segment is removably worn over the anterior teeth of the dental arch. The movable shell segment is removably worn over at least one posterior tooth on one side of the dental arch. The spring element is disposed between the anchoring mouthpiece section and the moving mouthpiece section for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section. The guide wire has a U-shaped portion and two rod portions, wherein the U-shaped portion is embedded in and disposed around three side walls of the moving mouthpiece section, and the rod portions are received in guide channels formed in buccal and lingual side walls of the anchoring mouthpiece section to guide movement of the moving mouthpiece section.)

1. A removable orthodontic device, comprising:

an anchoring mouthpiece section removably worn over a plurality of anterior teeth of a dental arch of a patient;

a movable dental mouthpiece section removably worn over at least one posterior tooth on one side of the dental arch;

a pair of spring elements disposed between the anchoring mouthpiece section and the moving mouthpiece section on buccal and lingual sides of the side of the dental arch for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section; and

and a guide wire having a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, wherein the U-shaped portion is embedded in and disposed around a buccal side wall, a lingual side wall and a distal side wall of the mobile mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal side wall and the lingual side wall of the anchoring mouthpiece section to guide movement of the mobile mouthpiece section.

2. The removable orthodontic device of claim 1, wherein each of the plurality of guide channels extends in a proximal-distal direction.

3. The removable orthodontic device of claim 1, wherein each of the buccal, lingual and distal sidewalls of the mobile mouthpiece section has a thickness to accommodate the U-shaped portion of the guide wire, and each of the buccal and lingual sidewalls of the anchoring mouthpiece section has a thickness to accommodate a tubular guiding channel for accommodating one of the two stem portions of the guide wire.

4. The removable orthodontic device of claim 1, wherein each of the pair of spring elements is wrapped around the guide wire.

5. The removable orthodontic device of claim 1 wherein each of the pair of spring elements is a compression coil spring.

6. The removable orthodontic device of claim 1, wherein each of the pair of spring elements is an extension coil spring.

7. The removable orthodontic device of claim 1, wherein the guide line connected to the anchoring shell segment forms a vertical height difference with the guide line connected to the mobile shell segment.

8. A removable orthodontic device, comprising:

an anchoring mouthpiece section removably worn over a plurality of posterior teeth on one side of a dental arch of a patient;

a movable mouthpiece section removably worn over at least one anterior tooth on the side of the dental arch;

a pair of spring elements disposed between the movable mouthpiece section and the anchoring mouthpiece section on buccal and lingual sides of the side of the dental arch for generating an elastic resilient force to move the movable mouthpiece section relative to the anchoring mouthpiece section; and

and a guide wire having a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, wherein the U-shaped portion is embedded in and disposed around a buccal side wall, a lingual side wall and a proximal side wall of the moving mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal side wall and the lingual side wall of the anchoring mouthpiece section to guide movement of the moving mouthpiece section.

9. The removable orthodontic device of claim 8 wherein each of the plurality of guide channels extends in a proximal-distal direction.

10. The removable orthodontic device of claim 8, wherein each of the buccal, lingual and proximal sidewalls of the mobile mouthpiece section has a thickness to accommodate the U-shaped portion of the guide wire, and each of the buccal and lingual sidewalls of the anchoring mouthpiece section has a thickness to accommodate a tubular guide channel for receiving one of the two stem portions of the guide wire.

11. The removable orthodontic device of claim 8, wherein each of the pair of spring elements is directly connected to the anchoring shell segment portion and the moving shell segment portion without being connected to the guide wire.

12. The removable orthodontic device of claim 8 wherein each of the pair of spring elements is an extension coil spring.

13. The removable orthodontic device of claim 8 further comprising:

a plurality of anchoring shell segments removably worn over a plurality of posterior teeth on either side of the dental arch, respectively;

a plurality of movable dental mouthpiece segment sections removably worn on at least one anterior tooth on the two sides of the dental arch, respectively;

a plurality of pairs of spring elements, wherein each pair of spring elements is disposed between the anchoring mouthpiece section and the moving mouthpiece section on buccal and lingual sides of one side of the dental arch for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section; and

a plurality of guide wires each having a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, wherein the U-shaped portion is embedded in and disposed around the buccal side wall, the lingual side wall and the proximal side wall of the moving mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal side wall and the lingual side wall of the anchoring mouthpiece section to guide movement of the moving mouthpiece section.

14. The removable orthodontic device of claim 13, further comprising a cross bar connecting the anchor shell segments and having a shape conforming to the top or bottom of the patient's mouth.

15. The removable orthodontic device of claim 8, wherein the anchoring shell segment further comprises a vertical extension extending from the buccal sidewall of the anchoring shell segment and a first connector formed on the vertical extension, the mobile shell segment further comprises a second connector formed on the buccal sidewall of the mobile shell segment, and the removable orthodontic device further comprises a resilient member connecting the second connector to the first connector for exerting a resilient traction force having horizontal and vertical components on the mobile shell segment.

16. A removable orthodontic device, comprising:

an anchoring mouthpiece section removably worn over a plurality of first teeth on one side of a dental arch of a patient;

a movable shell segment portion removably worn over a second tooth on the side of the dental arch;

the thread structure is provided with a U-shaped part, two rod parts and two annular spring parts arranged between two ends of the U-shaped part and the two rod parts, wherein the U-shaped part is embedded in and surrounds the buccal side wall and the lingual side wall of the movable mouthpiece section and the interproximal side wall between the buccal side wall and the lingual side wall, the two rod parts are embedded in the buccal side wall and the lingual side wall of the anchoring mouthpiece section, and the two annular spring parts are arranged between the movable mouthpiece section and the anchoring mouthpiece section to generate elastic resilience force to move the movable mouthpiece section relative to the anchoring mouthpiece section.

17. The removable orthodontic device of claim 16, wherein each of the buccal, lingual and interproximal side walls of the mobile mouthpiece section has a thickness to accommodate the U-shaped portion of the wireform and each of the buccal and lingual side walls of the anchoring mouthpiece section has a thickness to accommodate one of the two stem portions of the wireform.

Technical Field

The present invention relates to a technique for straightening teeth; and more particularly, to a removable orthodontic device that can correct crowding (spacing), rotation (rotation), and/or spacing of teeth, etc., while improving stability of tooth movement during orthodontic treatment.

Background

Misaligned teeth (misalified teeth) may affect a person's teeth aesthetics, function, and health. The goal of orthodontics is to properly align teeth through the use of appliances that apply mechanical forces to move teeth into positions or orientations that improve the function and aesthetics of the teeth.

Conventional archwire appliances (brases) use archwires (archwires) as the force applying appliances. The archwire may be pre-shaped and attached to the teeth by brackets (braskets) that are fixed to the tooth surface. When initially installed, the archwire will elastically deform to accommodate (accmodate) the misaligned tooth. The archwire is flexible and can exert forces on the teeth through the bracket to align the teeth with the pre-shaped shape of the archwire. The archwire exerts a continuous force on the teeth to urge them to the desired positions.

Another type of conventional bracket-less invisible appliances (clear aligners) has been widely used for orthodontic appliances, which have the advantages of less visible appearance and removable (compared to fixed archwire appliances). The principle of operation of the invisible appliance is also to utilize the elastic properties of the appliance itself, such that when the invisible appliance is worn over an irregular tooth, the body or shell is flexible to accommodate the irregular tooth and when it attempts to return to its original shape (i.e., deform), an elastic corrective force is created.

While existing removable orthodontic devices have been adequate for their intended purposes, such as correcting crowding, spacing and/or rotation problems, they have not been satisfactory in every respect.

Disclosure of Invention

According to some embodiments, a removable orthodontic device is provided that includes an anchoring shell segment (anchoring cap segment), a moving shell segment (moving cap segment), a pair of spring elements, and a guide wire. The anchoring shell segment portion is removably worn over a plurality of anterior teeth of an arch of a patient. The movable shell segment portion is removably worn over at least one posterior tooth on one side of the dental arch. The pair of spring elements are disposed between the anchoring mouthpiece section and the moving mouthpiece section on buccal and lingual sides of the dental arch for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section. The guide wire has a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, wherein the U-shaped portion is embedded in and disposed around a buccal side wall, a lingual side wall and a distal end (digital) side wall of the mobile mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal side wall and the lingual side wall of the anchor mouthpiece section to guide movement of the mobile mouthpiece section.

In some embodiments, each guide channel extends in a proximal-distal direction (medial-distal).

In some embodiments, each of the buccal, lingual and distal sidewalls of the mobile mouthpiece section has a thickness to accommodate the U-shaped portion of the guide wire, and each of the buccal and lingual sidewalls of the anchor mouthpiece section has a thickness to accommodate a tubular guide channel for receiving one of the two stem portions of the guide wire.

In some embodiments, each of the pair of spring elements is wound on a guide wire.

In some embodiments, each of the pair of spring elements compresses a coil spring.

In some embodiments, each of the pair of spring elements stretches a coil spring.

In some embodiments, a vertical height difference is formed between the guide wire connected to the anchoring mouthpiece section and the guide wire connected to the moving mouthpiece section.

According to some embodiments, there is also provided a removable orthodontic device including an anchoring shell segment, a moving shell segment, a pair of spring elements, and a guide wire. The anchoring mouthpiece section is removably worn over posterior teeth on one side of an arch of a patient. The mobile shell segment portion is removably worn over at least one anterior tooth on the same side of the dental arch. The pair of spring elements are disposed between the anchoring mouthpiece section and the moving mouthpiece section on buccal and lingual sides of the dental arch for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section. The guide wire has a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, wherein the U-shaped portion is embedded in and disposed around a buccal-side sidewall, a lingual-side sidewall, and a proximal end (medial) sidewall of the moving mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal-side sidewall and the lingual-side sidewall of the anchoring mouthpiece section to guide movement of the moving mouthpiece section.

In some embodiments, each of the buccal, lingual and proximal sidewalls of the mobile mouthpiece section has a thickness to accommodate a U-shaped portion of the guide wire, and each of the buccal and lingual sidewalls of the anchoring mouthpiece section has a thickness to accommodate a tubular guide channel for receiving one of the two stem portions of the guide wire.

In some embodiments, each of the pair of spring elements is directly connected to the anchoring and moving shell segment portions without being connected to the guide wire.

In some embodiments, the removable orthodontic device further comprises a plurality of anchoring shell segments, a plurality of moving shell segments, a plurality of pairs of spring elements, and a plurality of guide wires. The anchoring mouthpiece section is removably worn on a plurality of posterior teeth on both sides of the dental arch, respectively. The movable shell segment portion is removably worn over at least one anterior tooth on each of the two sides of the dental arch. Each pair of spring elements is disposed between the anchoring mouthpiece section and the moving mouthpiece section on the buccal and lingual sides of one side of the dental arch for generating an elastic resilient force to move the moving mouthpiece section relative to the anchoring mouthpiece section. The guide wires have a U-shaped portion and two rod portions extending from both ends of the U-shaped portion, respectively, wherein the U-shaped portion is embedded in and disposed around a buccal side wall, a lingual side wall and a proximal side wall of the moving mouthpiece section, and a plurality of guide channels for receiving the two rod portions are formed in the buccal side wall and the lingual side wall of the anchoring mouthpiece section to guide movement of the moving mouthpiece section.

In some embodiments, the removable orthodontic device further comprises a transverse bar. A cross-bar connects the anchoring mouthpiece sections and has a shape that conforms to the top (palate) or bottom (floor) of the patient's mouth.

In some embodiments, the anchoring shell segment further comprises a vertical extension extending from a buccal sidewall of the anchoring shell segment and a first connection member formed on the vertical extension, the mobile shell segment further comprises a second connection member formed on the buccal sidewall of the mobile shell segment, and the removable orthodontic device further comprises an elastic member connecting the second connection member to the first connection member for exerting an elastic traction force having horizontal and vertical components on the mobile shell segment.

According to some embodiments, there is also provided a removable orthodontic device including an anchoring shell segment, a mobile shell segment, and a wire construct. The anchoring mouthpiece section is removably worn over a first plurality of teeth on one side of an arch of a patient. The mobile shell segment portion is removably worn on a second tooth on the same side of the dental arch. The wireform has a U-shaped portion, two rod portions and two annular spring portions disposed between two ends of the U-shaped portion and the two rod portions, wherein the U-shaped portion is embedded in and disposed around a buccal side wall, a lingual side wall and an interproximal (interproximal) side wall between the buccal side wall and the lingual side wall of the mobile mouthpiece section, the two rod portions are embedded in the buccal side wall and the lingual side wall of the anchor mouthpiece section, and the two annular spring portions are disposed between the mobile mouthpiece section and the anchor mouthpiece section for generating an elastic resilient force to move the mobile mouthpiece section relative to the anchor mouthpiece section.

In some embodiments, each of the buccal, lingual and intermediate sidewalls of the mobile mouthpiece section has a thickness to accommodate the U-shaped portion of the wireform and each of the buccal and lingual sidewalls of the anchoring mouthpiece section has a thickness to accommodate one of the two stem portions of the wireform.

Drawings

FIG. 1 is a schematic view of some embodiments of a removable orthodontic device worn on an arch of a patient's teeth, as viewed from the occlusal surface of the device;

FIG. 2 is a side view of the removable orthodontic device of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A' of FIG. 1;

FIG. 4 is a cross-sectional view taken along line B-B' of FIG. 1;

FIG. 5 is a side view of some embodiments of a removable orthodontic apparatus;

FIG. 6 is a side view of some embodiments of a removable orthodontic apparatus;

FIG. 7 is a schematic view of the removable orthodontic device of some embodiments worn on an arch of a patient's teeth, as viewed from the occlusal surface of the device;

FIG. 8 is a side view of the removable orthodontic device of FIG. 7;

FIG. 9 is a side view of some embodiments of a removable orthodontic apparatus;

FIG. 10 is a schematic view of the removable orthodontic device of some embodiments worn on an arch of a patient's teeth, as viewed from the occlusal surface of the device;

fig. 11 is a side view of the removable orthodontic device of fig. 10.

Description of the symbols

10. 10 ', 10 ", 20', 30-removable orthodontic devices;

11. 21-a first facing unit;

111. 211, 31-anchoring facing segment;

111A to a bottom wall;

111B, 211B, 31B to the (buccal) side wall;

111C, 211C, 31C to the (lingual) side wall;

212-cross rod;

211D-vertical extension;

2110 to the (first) connector;

12. 22-a second mouthpiece unit;

121. 221, 32-moving mouthpiece section part;

121A to a bottom wall;

121B, 221B, 32B to the (buccal) side wall;

121C, 221C, 32C to the (lingual) side wall;

32D-interproximal sidewalls;

121D-the distal sidewall;

221D to a proximal end side wall;

2210 to (second) connecting pieces;

13. 14, 23, 24-spring element;

15. 16, 25, 26-guide wire;

151. 161, 251, 261-U-shaped parts;

152. 162, 252, 262 to the stem portion;

27-an elastic element;

33-correcting the line structure;

331-U shaped portion;

332 to a rod portion;

333-annular spring part;

C. c' -a guide channel;

d, vertical height difference;

l-dotted line;

m-dental arch;

r-a tooth receiving chamber;

t-thickness;

OS-occlusal surface.

Detailed Description

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Spatially relative terms, such as "below," "lower," "above," "upper," and the like, may be used hereinafter with respect to elements or features in the figures to facilitate describing a relationship between one element or feature and another element(s) or feature(s) in the figures. These spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be oriented in different orientations (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Moreover, the same reference numbers and/or words may be repeated in the various embodiments below for simplicity and clarity and are not intended to limit the specific relationships between the various embodiments and/or structures discussed. In the drawings, the shape or thickness of the structures may be exaggerated to simplify or facilitate labeling.

The present invention provides various exemplary embodiments related to a removable orthodontic device that can correct various tooth problems such as crowding, spacing and/or rotation and improve stability of tooth movement during correction. Some variations of the embodiments are described below. Common elements are designated with the same reference numerals throughout the various views and illustrative embodiments.

Fig. 1 shows a schematic view of a removable orthodontic device 10 according to some embodiments worn on an arch of a patient, as viewed from the occlusal surface of the device. Fig. 2 shows a side view of the removable orthodontic device 10 of fig. 1. In some embodiments, as shown in fig. 1 and 2, the removable orthodontic device 10 includes a first shell unit 11 and a second shell unit 12. The second mouthpiece unit 12 is configured to be removably worn over a number of posterior teeth (posteroir teeth) of an arch M that are to be moved in a distal (i.e., posterior) direction, such as the first large molars depicted by dashed lines. The first mouthpiece unit 11 is configured to be removably worn over a number of anterior teeth (anterior) of the same dental arch M, such as a plurality of incisors, lateral incisors, canine teeth, first and second molars depicted by dashed lines, and to act as an anchor (anchorages) for a plurality of spring elements to exert an elastic corrective force on the posterior teeth engaged with the second mouthpiece unit 12 (as will be further described below). Prior to wearing the removable orthodontic device 10, the second molar tooth will be extracted to create space for the posterior distal movement (dislocation).

As shown in fig. 1, the first mouthpiece unit 11 includes an anchoring mouthpiece section (anchor cap section) 111 shaped to surround and cover the anterior teeth. The anchoring shell segment portion 111 is structured to mainly include a bottom wall 111A and two opposite side walls 111B, 111C extending from the bottom wall 111A to form a plurality of tooth receiving chambers R for receiving the anterior teeth on the inner surface of the anchoring shell segment portion 111 (see fig. 3). The anchoring mouthpiece section 111 further includes an occlusal surface OS (see fig. 1 to 3) formed on the outer surface and opposed to the inner tooth receiving chamber R. As shown in fig. 1, the second shell unit 12 includes two moving cap segment portions (moving cap segments)121, each moving cap segment portion 121 being shaped to surround and cover the posterior teeth (hereinafter, also referred to as left or right posterior teeth) on the left or right side of the dental arch M. Similarly, the structure of the mobile shell segment 121 mainly includes a bottom wall 121A and two opposite side walls 121B, 121C extending from the bottom wall 121A to form a tooth receiving chamber R for receiving the left or right posterior teeth on the inner surface of the mobile shell segment 121 (see fig. 4). The mobile shell segment 121 further includes an occlusal surface OS (see fig. 1, 2 and 4) formed on the outer surface and opposite the inner tooth receiving cavity R.

In some embodiments, each of the anchoring shell segment 111 and the moving shell segment 121 is a rigid shell that does not deform or exert an elastic corrective force on the teeth when worn. In some embodiments, the anchoring mouthpiece section 111 and the moving mouthpiece section 121 may be made of a composite resin (orthodontic resin) or other materials known in the art to be suitable for use in the oral cavity.

As shown in fig. 1, the removable orthodontic device 10 further includes a pair of spring elements 13, 13 provided between the anchoring shell segment section 111 on the buccal and lingual sides of the left side of the arch M and the moving shell segment section 121 worn on the left posterior teeth. Furthermore, the removable orthodontic device 10 further comprises another pair of spring elements 14, 14 disposed between the buccal and lingual sides of the anchoring shell segment 111 on the buccal and lingual sides of the right side of the arch M and the moving shell segment 121 worn on the right posterior teeth. One end of each spring element 13/14 may be connected to (e.g., embedded in) anchoring mouthpiece section 111, while the other end may be connected to (e.g., embedded in) a corresponding moving mouthpiece section 121. In this example, each spring element 13/14 is a compression coil spring. Accordingly, when the spring elements 13 and 14 attempt to return to their original undeformed shape, the spring elements 13 and 14 may generate an elastic resilient force to move or push the mobile mouthpiece section 121 in a direction away from the anchoring mouthpiece section 111 (as indicated by the arrows in fig. 1 and 2), thereby causing the posterior teeth to move in a distal direction.

As shown in fig. 1, the removable orthodontic device 10 further includes a guide wire 15 for guiding the movement of the moving shell segment 121 worn on the left posterior teeth with respect to the anchoring shell segment 111, and another guide wire 16 for guiding the movement of the moving shell segment 121 worn on the right posterior teeth with respect to the anchoring shell segment 111. Each guide wire 15/16 may be made of metal or Shape Memory Alloy (SMA) and may have a U-shaped portion 151/161 and two rod portions 152, 152/162, 162 extending from opposite ends of the U-shaped portion 151/161.

As shown in FIG. 1, the U-shaped portion 151/161 fits within and around the buccal sidewall 121B, lingual sidewall 121C and distal sidewall 121D (which connects between the buccal and lingual sidewalls 121B and 121C and is located near the posterior side of the arch M) of the moving shell segment portion 121. More specifically, the side walls of the mobile mouthpiece section 121 each have a thickness T to accommodate a tubular passage C for receiving the U-shaped portion 151/161 of the guide wire 15/16 (see fig. 4). In this example, the mobile mouthpiece section 121 forms a continuous inner tubular channel C through the buccal sidewall 121B, lingual sidewall 121C and distal sidewall 121D. In addition, the cross-sectional dimension (i.e., diameter) of tubular passage C matches the cross-sectional dimension (i.e., diameter) of guide wire 15/16 such that U-shaped portion 151/161 can be fixedly inserted into mobile mouthpiece section 121. In some other embodiments, the U-shaped portion 151/161 of the guide wire 15/16 may be integrally (intugrally) formed in the side wall of the mobile mouthpiece section 121.

As shown in fig. 1, the two rod portions 152, 152/162, 162 may be movably (movably) received in guide channels C formed in buccal side wall 111B and lingual side wall 111C of the anchoring mouthpiece section 111. More specifically, the side walls of the anchoring mouthpiece section 111 each have a thickness T to accommodate a tubular guide channel C' for receiving one of the two stem portions 152, 152/162, 162 of the guide wire 15/16 (see fig. 3). In addition, the cross-sectional dimension (i.e. diameter) of tubular guide channel C 'is slightly larger than the cross-sectional dimension (i.e. diameter) of guide wire 15/16 to allow said rod portion 152/162 to be movable in tubular guide channel C' (extending in the proximal-distal direction) when the mobile mouthpiece section 121 is pushed by spring elements 13 and 14. In some embodiments, each spring element 13/14 is wrapped around a guide wire 15/16, as shown in fig. 1 and 2.

With the above configuration, the guide wires 15 and 16 can provide stability and guidance during the movement of the moving shell segment 121, thereby improving the stability of the tooth movement during the straightening. In more detail, the anchoring mouthpiece section 111 engaged with a plurality of teeth may have a large contact area with the teeth to provide a strong anchoring, and the guide wire 15/16 may form a firm bond with three side walls of the moving mouthpiece section 121, and the guide channel C' may act on the guide wire 15/16 to better control the movement of the posterior teeth.

Fig. 5 illustrates a side view of another removable orthodontic device 10' according to some embodiments, wherein each spring element 13/14 uses a tension coil spring rather than a compression coil spring. In this example (for closing the space between the front and rear teeth), when the spring elements 13 and 14 try to return to their original undeformed shape, the spring elements 13 and 14 may generate an elastic return force to move or pull the moving shell segment 121 in a direction towards the anchoring shell segment 111 (as indicated by the arrows in fig. 1 and 2). The guide wires 15 and 16 of the removable orthodontic device 10' may have a similar configuration as the removable orthodontic device 10 described above, and thus may also provide stability and guidance during movement of the moving shell segment 121 and the teeth therein.

Fig. 6 shows a side schematic view of another removable orthodontic device 10 "according to some embodiments, wherein the guide line 15/16 connected to the anchoring shell segment 111 and the guide line 15/16 connected to the mobile shell segment 121 also form a vertical height difference D therebetween. In this example, the removable orthodontic device 10 ″ may not only drive the moving shell segment 121 and the teeth therein to move in a horizontal direction (e.g., away from or toward the anchoring shell segment 111) in a manner similar to the removable orthodontic device 10 or 10', but may also generate a vertical force through a guide wire 15/16 having a vertical step to effect an intrusion of the moving shell segment 121 and the teeth therein, as shown by the arrow in fig. 6, to correct overly erupting posterior teeth.

Fig. 7 is a schematic view of another removable orthodontic device 20 worn on an arch of a patient according to some embodiments, as viewed from the occlusal surface of the device. Fig. 8 shows a side view of the removable orthodontic device 20 of fig. 7. In some embodiments, as shown in fig. 7 and 8, the removable orthodontic device 20 includes a first shell unit 21 and a second shell unit 22. The second shell unit 22 is configured to be removably worn over a number of anterior teeth of an arch M that are about to recede (i.e., posteriorly), such as the first molars depicted by dashed lines. The first mouthpiece unit 21 is configured to be removably worn over a number of posterior teeth of the same dental arch M, such as a plurality of first and second large molars depicted by dashed lines, and to act as anchors (anchors) for a plurality of spring elements to exert a resilient corrective force on the anterior teeth engaged with the second mouthpiece unit 22 (as will be further described below). Prior to wearing the removable orthodontic device 20, the second premolar will be extracted to create space for the retraction (retraction) of the anterior teeth. In this example, the removable orthodontic device 20 is not worn on the incisors, lateral incisors, and canines of the dental arch M.

As shown in fig. 7, the first shell unit 21 includes two anchoring shell segment portions 211, each anchoring shell segment portion 211 being shaped to surround and cover the posterior teeth (hereinafter, also referred to as left posterior teeth or right posterior teeth) on the left or right side of the dental arch M, and the second shell unit 22 includes two moving shell segment portions 221, each moving shell segment portion 221 being shaped to surround and cover the anterior teeth (hereinafter, also referred to as left anterior teeth or right anterior teeth) on the left or right side of the dental arch M. The structure and materials of the anchoring shell segment portion 211 and the moving shell segment portion 221 may be similar to those of the anchoring shell segment portion 111 and the moving shell segment portion 121, and thus will not be described herein again.

As shown in fig. 7, the removable orthodontic device 20 further includes a pair of spring elements 23, 23 disposed between the anchoring shell segment section 211 worn on the left posterior teeth and the moving shell segment section 221 worn on the left anterior teeth on the buccal and lingual sides of the left side of the dental arch M. Furthermore, the removable orthodontic device 20 further comprises another pair of spring elements 24, 24 provided between the anchoring shell segment portion 211 worn on the right posterior teeth and the moving shell segment portion 221 worn on the right anterior teeth on the buccal and lingual sides of the right side of the dental arch M. One end of each spring element 23/24 may be connected to (e.g., embedded in) the respective anchoring mouthpiece section 211, while the other end may be connected to (e.g., embedded in) the respective moving mouthpiece section 221. In this example, each spring element 23/24 is an extension coil spring and may be directly connected to the anchoring mouthpiece section 211 and the moving mouthpiece section 222 without being connected to the guide wire 25/26 (see fig. 8). Accordingly, when the spring elements 23 and 24 attempt to return to their original undeformed shape, the spring elements 23 and 24 may generate an elastic return force to move or pull the moving shell segment portion 221 in a direction toward the anchoring shell segment portion 211 (as indicated by arrows in fig. 7 and 8), thereby enabling the withdrawal of the anterior teeth (i.e., closing the space between the anterior and posterior teeth).

It should be understood that in some other embodiments, each spring element 23/24 may also use a compression coil spring instead of a tension coil spring in order to generate an elastic return force to move or push the moving shell segment portion 221 in a direction away from the anchoring shell segment portion 211 (e.g., where it is desired to increase the space between the anterior and posterior teeth).

As shown in fig. 7, the removable orthodontic device 20 further includes a guide line 25 for guiding the movement of the moving shell segment portion 221 fitted to the left anterior tooth with respect to the anchoring shell segment portion 211 fitted to the left posterior tooth, and another guide line 26 for guiding the movement of the moving shell segment portion 221 fitted to the right anterior tooth with respect to the anchoring shell segment portion 211 fitted to the right posterior tooth. Each guide wire 25/26 may be made of metal or Shape Memory Alloy (SMA) and may have a U-shaped portion 251/261 and two rod portions 252, 252/262, 262 extending from either end of the U-shaped portion 251/261.

As shown in fig. 7, the U-shaped portion 251/261 is embedded in and disposed around the buccal sidewall 221B, the lingual sidewall 221C, and the proximal sidewall 221D (connected between the buccal and lingual sidewalls 221B and 221C and located near the anterior side of the dental arch M) of the moving shell segment portion 221. The manner in which U-shaped portion 251/261 is joined to mobile shell segment 221 is similar to the manner in which U-shaped portion 151/161 is joined to mobile shell segment 121 described above and therefore will not be described in detail herein. In addition, the two rod portions 252, 252/262, 262 may be movably received in guide channels C formed in the buccal side wall 211B and the lingual side wall 211C of the anchoring mouthpiece section 211. The construction of the anchoring socket segment 211 for receiving the two rod portions 252, 252/262, 262 (e.g. the tubular guide channels formed in the side walls) is similar to the construction of the anchoring socket segment 111 described above (see figure 3) and will not be described in detail here. With the above configuration, the guide wires 25 and 26 can provide stability and guidance during the movement of the moving shell segment portion 221, thereby improving the stability of the tooth movement during the straightening.

In some embodiments, the first mouthpiece unit 21 further includes a cross bar 212 connected to the anchoring mouthpiece section 211 and having a shape conforming to the top (palate) or bottom (floor) (not shown) of the patient's mouth. Thereby, the stability and holding force of the first mouthpiece unit 21 at the time of wearing can be improved.

Fig. 9 illustrates a side view of another removable orthodontic apparatus 20' according to some embodiments. In contrast to the above-described removable orthodontic device 20, each of the anchoring shell segment parts 211 of the removable orthodontic device 20' further has a vertical extension 211D extending from the buccal-side sidewall thereof (e.g., the portion of the anchoring shell segment part 211 below the dotted line L shown in fig. 9) and at least one (first) connection 2110 (e.g., a hook or a button) formed on the vertical extension 211D, and each of the moving shell segment parts 221 further has a (second) connection 2210 formed on the buccal-side sidewall thereof. In addition, the removable orthodontic device 20' further includes a plurality of elastic members 27 (e.g., elastic threads or rubber bands) that connect the connector 2110 on the first shell unit 21 to the connector 2220 on the second shell unit 22. Due to the vertical height difference between the connector 2110 and the connector 2220 (as shown in fig. 9), the elastic elements 27 may exert elastic traction forces with horizontal and vertical components on the moving mouthpiece section 221 (as shown by the horizontal and vertical arrows in fig. 9) to pull the moving mouthpiece section 221 and the front teeth simultaneously in the horizontal and vertical (or apical) directions. In this way, a bowing effect (i.e., the tendency of the moving anterior teeth to topple in the distal direction) of the tooth during retraction is prevented.

Fig. 10 is a schematic view of another removable orthodontic device 30 worn on an arch of a patient according to some embodiments, as viewed from the occlusal surface of the device. Fig. 11 shows a side view of the removable orthodontic device 30 of fig. 10. In some embodiments, as shown in fig. 10 and 11, the removable orthodontic device 30 includes an anchoring shell segment 31 and a moving shell segment 32. The moving mouthpiece section 32 is configured to be removably worn over a tooth (depicted by dashed lines) on one side of an arch M that is tipped (or rotated) in the proximal direction. The mobile mouthpiece section 32 may be shaped to encompass and cover the poured tooth (also referred to as the second tooth for purposes of illustration). The anchoring mouthpiece segment 31 is configured to be removably worn over a plurality of teeth (depicted by dashed lines, also referred to as first teeth for illustrative purposes) on the same side of the dental arch M and adjacent to the dumped (second) teeth, and to serve as an anchor for an orthodontic wire structure to apply an elastic corrective force on the dumped teeth inside the moving mouthpiece segment 32 (as will be further described below). The anchoring mouthpiece section 31 may be shaped to surround and cover the plurality of first teeth. The structure and materials of the anchoring shell segment portion 31 and the moving shell segment portion 32 may be similar to those of the anchoring shell segment portion 111 and the moving shell segment portion 121, and thus will not be described herein again.

As shown in fig. 10 and 11, the removable orthodontic device 30 further includes an orthodontic wire structure 33. The corrective wire structure 33 may be made of a Shape Memory Alloy (SMA) and may have a U-shaped portion 331, two rod portions 332, and two annular spring portions 333, 333 disposed between both ends of the U-shaped portion 331 and the two rod portions 332, 332.

The U-shaped portion 331 may be fixedly inserted into and disposed around the buccal side wall 32B, the lingual side wall 32C, and the interproximal side wall 32D (connected between the buccal and lingual side walls 32B and 32C and located near the anterior side of the dental arch M) of the mobile mouthpiece section 32. The manner in which the U-shaped portion 331 is coupled to the mobile shell segment 32 is similar to the manner in which the U-shaped portion 151/161 is coupled to the mobile shell segment 121, and therefore will not be described in detail herein. The two rod portions 332, 332 may be fixedly embedded in the clip-side wall 31B and the tongue-side wall 31C of the anchoring mouthpiece section part 31. The two rod portions 332, 332 are joined with the anchoring socket segment portion 31 in a manner similar to that described above for the rod portion 152/162 joined with the anchoring socket segment portion 111 (see fig. 3), but the cross-sectional dimension (i.e., diameter) of each channel formed in the anchoring socket segment portion 31 matches the cross-sectional dimension (i.e., diameter) of the rod portion 332 so that the two rod portions 332, 332 may be fixedly embedded in the anchoring socket segment portion 31. The two annular spring portions 333, 333 are arranged between the moving shell segment portion 32 and the anchoring shell segment portion 31 to generate an elastic return force (when they attempt to return to their original undeformed shape) to move the moving shell segment portion 32 relative to the anchoring shell segment portion 31, as indicated by the arrows in fig. 11. Hereby, the toppling (second) tooth can be centered.

It should be understood that many variations and modifications may be made to the various removable orthodontic devices described above. For example, the number and mounting positions of the anchoring socket segment, the moving socket segment, the spring element, the guide wire and/or the corrective wire structure may also be changed according to actual needs, and are not limited to the above illustrative embodiments.

Although the embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. As one of ordinary skill in the art will readily appreciate from the disclosure, processes, machines, manufacture, compositions of matter, means, methods, or steps, presently existing or later to be developed that perform substantially the same function or achieve substantially the same result as the corresponding embodiments described herein may be utilized according to the present disclosure. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods, or steps. Furthermore, each claim constitutes a separate embodiment, and combinations of different claims and embodiments are within the scope of the invention.