Correcting appliance based on transverse palatal bar and extraoral traction

Abstract

The utility model relates to the technical field of tooth correction, and discloses an appliance based on a transpalatal bar and extraoral traction, which comprises a bracket appliance, the bracket appliance consists of two orthodontic bands, a plurality of bracket main bodies and orthodontic wires, the plurality of bracket main bodies are respectively fixed on a plurality of teeth, the two orthodontic bands are respectively sleeved on two molars, and the orthodontic wires are fixed on the bracket main bodies. A plurality of bracket bodies are connected with two orthodontic bands through orthodontic wires, the bracket comprises an extraoral traction device, the extraoral traction device is composed of a connecting bow, two external connecting steel wires and an external tractor, and the two ends of the connecting bow are fixedly connected with the outer sides of the two orthodontic bands respectively; on the basis of an original bracket appliance, the transverse palatal bar assembly is additionally arranged to be matched with an extraoral traction device in an auxiliary manner, so that the appliance can be used for correcting the symptoms of irregular tooth arrangement, large tooth space and the like, meanwhile, the condition of adduction of a dental arch in the correction process can be prevented, meanwhile, the orthodontic effect on the tooth prolapse symptom can be achieved, and the orthodontic effect is good. And compared with the traditional technology, the appliance has higher functionality.

Description

Technical Field

[0001] The utility model relates to the technical field of tooth correction, and more specifically to an appliance based on a transpalatal bar and extraoral traction. Background Art

[0002] The transpalatal bar is an auxiliary device of a fixed appliance widely used in orthodontic clinics. Different from traditional concepts, using the transpalatal bar alone cannot effectively strengthen the anchorage. Combining it with other traditional anchorage strengthening devices can provide sufficient anchorage in some cases. In recent years, the transpalatal bar is often combined with implant anchorage to intrude molars or move the upper dental arch mesially or distally as a whole. Future researchers can explore more combination schemes of the transpalatal bar with implant anchorage, maxillary skeletal expansion devices, etc. for orthodontic treatment. Extraoral traction is an orthodontic treatment method, mainly using a headgear device with the back, top or neck of the head as the corrective anti-basis, cooperating with an inner arch and various orthodontic accessories such as face bows or chins cups to correct malocclusions such as maxillary protrusion, mandibular protrusion, anterior open bite or mesial inclination of molars.

[0003] At present, the application of the transpalatal bar and extraoral traction in bracket correction has not achieved effective cooperation. Bracket correction, as a commonly used tooth correction method, is mainly used to solve problems such as uneven tooth arrangement and tooth gaps. However, it has certain limitations in preventing the dental arch from contracting inward (i.e., the teeth on both cheeks contracting inward) and tooth protrusion. Summary of the Utility Model

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides an appliance based on a transpalatal bar and extraoral traction to solve the problem that the traditional bracket appliance in the above-mentioned background art is difficult to prevent the dental arch from contracting inward and tooth protrusion when correcting uneven tooth arrangement and tooth gaps.

[0005] The utility model provides the following technical solution: An appliance based on a transpalatal bar and extraoral traction, including a bracket appliance. The bracket appliance is composed of two orthodontic bands, a plurality of bracket bodies, and orthodontic wires. The plurality of bracket bodies are respectively fixed on a plurality of teeth. The two orthodontic bands are respectively sleeved on two molars. The plurality of bracket bodies and the two orthodontic bands are connected by orthodontic wires. It includes an extraoral traction device, which is composed of a connecting arch, two outer connecting wires, and an external traction device. Both ends of the connecting arch are fixedly connected to the outside of the two orthodontic bands. The connecting arch is in a U shape and semi-surrounds a plurality of teeth. The two outer connecting wires are fixedly connected to the side wall of the connecting arch, and the two outer connecting wires are symmetric about the midpoint of the connecting arch. The other ends of the two outer connecting wires extend to the outside of the mouth. The external traction device surrounds the head and is docked with the outer ends of the two outer connecting wires outside the mouth. It includes a transpalatal bar assembly, which is fixedly connected between the two orthodontic bands.

[0006] Furthermore, the external tractor includes two ear hooks, which are respectively hung on the two ears. The back ends of the two external tractors are fixedly connected by elastic bands, and the front ends of the ear hooks are connected to connectors through connecting rods. The two connectors are respectively connected to two external steel wires.

[0007] Furthermore, the transverse palatal rod assembly includes a main transverse palatal rod, and both ends of the main transverse palatal rod are fixedly connected to two end rods through two telescopic parts, and the outer ends of the two end rods are fixedly connected to the inner sides of two orthodontic band rings.

[0008] Furthermore, the transverse palate rod assembly includes an end block and a sleeve, the end block is fixedly connected to the side wall of the sleeve by two arc-shaped connecting plates, and a turntable is arranged between the end block and the sleeve, a polygonal sliding column is slidably sleeved in the inner cavity of the sleeve, the shape of the polygonal sliding column is adapted to the shape inside the sleeve, a threaded rotating rod is fixedly connected to one side of the turntable, the threaded rotating rod penetrates into the inner cavity of the sleeve, and the polygonal sliding column is threadedly sleeved on the side wall of the threaded rotating rod, the end block is fixedly connected to the end rod, and one end of the polygonal sliding column is fixedly connected to the main transverse palate rod.

[0009] Furthermore, the connector includes an outer shell, a winding reel is movably sleeved on the inner cavity of the outer shell, a through slot connected to the inner cavity of the winding reel is opened on one side of the winding reel, a rope is wound around the side wall of the winding reel, one end of the rope passes through the through slot to the outside of the outer shell and connects with an external steel wire, and a knob assembly connected to the winding reel is arranged on the front side of the outer shell.

[0010] Furthermore, the butt end of the rope and the external connecting steel wire is provided with a through hole, and the outer end of the hole of the external connecting steel wire is arranged in a hook shape.

[0011] Furthermore, the knob assembly includes a main rotating column and a polygonal ring. The back end of the main rotating column passes through the outer shell and is connected to the winding disk. A polygonal axial hole is opened at the back end of the main rotating column. A polygonal rod is slidably sleeved in the polygonal axial hole. A cylindrical button is fixedly connected to the front end of the polygonal rod. The polygonal ring is fixedly connected to the front side of the outer shell, and the inner cavity shape of the cylindrical button is adapted to the polygonal ring.

[0012] Furthermore, a tension spring is arranged in the polygonal shaft hole of the main rotating column, and the back end of the polygonal rod is transmission-connected to the inner wall of the main rotating column through the tension spring.

[0013] Technical effects and advantages of the utility model:

[0014] On the basis of the original bracket appliance, the utility model adds a transpalatal arch component and an extraoral traction device for auxiliary cooperation, so that while the appliance can correct symptoms such as uneven tooth arrangement and large tooth gaps, it can also prevent the dental arch from retracting inward (the teeth on both cheeks retract inward) during orthodontics, and at the same time can also achieve the orthodontic effect on the symptom of tooth protrusion, making the appliance more functional than the traditional technology;

[0015] In addition, the structure of the transpalatal arch component and the external traction device of the extraoral traction device is improved, so that the length of the transpalatal arch component can be appropriately adjusted according to the size of the orthodontic personnel's oral cavity, making the appliance more adaptable after installation, and the traction force of the extraoral traction device on the teeth can be adjusted through the structure of the external traction device, avoiding the situation of poor orthodontic effect or excessive orthodontics due to improper traction force. Brief Description of the Drawings

[0016] Figure 1 is the overall structural schematic diagram of the utility model;

[0017] Figure 2 is the structural schematic diagram of the external traction device of the extraoral traction device of the utility model;

[0018] Figure 3 is the utility model Figure 1 is the structural schematic diagram of the transpalatal arch component in;

[0019] Figure 4 is the utility model Figure 3 is the structural schematic diagram of the telescopic member in;

[0020] Figure 5 is the utility model Figure 2 is the sectional structural schematic diagram of the connector in;

[0021] Figure 6 is the utility model Figure 5 is the exploded structural schematic diagram of the knob assembly in.

[0022] The reference numerals are: 1, orthodontic band; 2, bracket body; 3, orthodontic wire; 4, transpalatal arch component; 5, connecting arch; 6, external connecting wire; 7, external traction device; 71, ear hanging ring; 72, connector; 73, elastic band; 41, main body transpalatal arch; 42, telescopic member; 43, end rod; 421, end block; 422, barrel sleeve; 423, arc-shaped connecting plate; 424, rotating disk; 425, threaded rotating rod; 426, polygonal sliding column; 721, outer shell; 722, winding disk; 723, rope belt; 724, knob assembly; 725, main body rotating column; 726, cylindrical button; 727, polygonal rod; 728, polygonal ring. Detailed Description of the Invention

[0023] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings.

[0024] Reference Figure 1 and Figure 2 The utility model provides an orthodontic appliance based on a transverse palatal bar and extraoral traction, including a bracket appliance, the bracket appliance is composed of two orthodontic band rings 1, a plurality of bracket bodies 2, and an orthodontic wire 3, the plurality of bracket bodies 2 are respectively fixed on a plurality of teeth, the two orthodontic band rings 1 are respectively sleeved on two molars, the plurality of bracket bodies 2 are connected with the two orthodontic band rings 1 through the orthodontic wire 3, including an extraoral traction device, the extraoral traction device is composed of a connecting arch 5, two external connecting steel wires 6, and an external traction device 7, the two ends of the connecting arch 5 are respectively fixedly connected to the outsides of the two orthodontic band rings 1, the connecting arch 5 is U-shaped and semi-encloses a plurality of teeth, the two external connecting steel wires 6 are fixedly connected to the side walls of the connecting arch 5, and the two external connecting steel wires 6 are symmetrical along the midpoint of the connecting arch 5, the other ends of the two external connecting steel wires 6 extend to the outside of the mouth, and the external traction device 7 surrounds the head and docks with the outer ends of the two external connecting steel wires 6; including a transverse palatal bar assembly 4, the transverse palatal bar assembly 4 is fixedly connected between the two orthodontic band rings 1.

[0025] Reference Figure 2 The external tractor 7 includes two ear hooks 71, which are respectively hung on the two ears. The back ends of the two external tractors 7 are fixedly connected by elastic bands 73. The front ends of the ear hooks 71 are connected to connectors 72 through connecting rods. The two connectors 72 are respectively connected to the two external connecting steel wires 6. When the two external connecting steel wires 6 are pulled by the external tractor 7 and a backward pulling force is applied to them, in order to prevent the external tractor 7 from falling off or deviating and affecting the force applied to the external connecting steel wires 6, the positioning effect can be achieved by arranging the two ear hooks 71 to be hung at the position of the two ears, thereby preventing the external tractor 7 from falling off or deviating. At this time, through the elastic force of the elastic band 73 and the support of the elastic band 73 by the head, the external tractor 7 can exert a pulling force on the external connecting steel wires 6.

[0026] Reference Figure 3 The transverse palatal rod assembly 4 includes a main transverse palatal rod 41, and both ends of the main transverse palatal rod 41 are fixedly connected to two end rods 43 through two telescopic parts 42, and the outer ends of the two end rods 43 are fixedly connected to the inner sides of the two orthodontic band rings 1. Due to the differences in the sizes of people's oral cavity, when the transverse palatal rod assembly 4 applies a supporting force to the two orthodontic band rings 1, the length of the transverse palatal rod assembly 4 may be adapted to the size of the oral cavity, resulting in the transverse palatal rod assembly 4 failing to achieve an appropriate external supporting effect. In order to avoid this situation, the structure of the traditional transverse palatal rod assembly 4 is improved, and two telescopic parts 42 are added. The overall length of the transverse palatal rod assembly 4 can be adjusted by telescoping the two telescopic parts 42, so that the transverse palatal rod assembly 4 can achieve the best adaptation effect after installation.

[0027] ReferenceFigure 4 The transverse palatal rod assembly 4 includes an end block 421 and a sleeve 422. The end block 421 and the side wall of the sleeve 422 are fixedly connected by two arc-shaped connecting plates 423, and a rotary disk 424 is arranged between the end block 421 and the sleeve 422. A polygonal sliding column 426 is slidably sleeved in the inner cavity of the sleeve 422. The shape of the polygonal sliding column 426 matches the shape of the inner shape of the sleeve 422. A threaded rotating rod 425 is fixedly connected to one side of the rotary disk 424. The threaded rotating rod 425 penetrates into the inner cavity of the sleeve 422, and the polygonal sliding column 426 is threadedly sleeved on the side wall of the threaded rotating rod 425. The end block 421 is fixedly connected to the end rod 43, and the polygonal sliding column 42 One end of the telescopic member 42 is fixedly connected to the main transverse palatal rod 41, and the threaded rotary rod 425 is driven to rotate by rotating the rotary disk 424. Under the influence of the threaded structure, the polygonal slide column 426 slides to achieve the overall telescopic effect of the telescopic member 42. Through the connection method of the end block 421, the sleeve 422, and the arc-shaped connecting plate 423 and the shape characteristics of the polygonal slide column 426, the telescopic member 42 will not cause the end rod 43 and the main transverse palatal rod 41 to rotate during and after operation, and at the same time, the overall stability of the transverse palatal rod assembly 4 can be ensured, and the self-rotation between the components such as the main transverse palatal rod 41 and the end rod 43 of the telescopic member 42 can be avoided.

[0028] Reference Figure 5 The connector 72 includes a shell 721, and a winding disk 722 is movably connected to the inner cavity of the shell 721. A groove communicating with the inner cavity of the winding disk 722 is opened on one side of the winding disk 722. A rope 723 is wound on the side wall of the winding disk 722. One end of the rope 723 passes through the groove to the outside of the shell 721 and connects with the external connecting wire 6. A knob assembly 724 connected to the winding disk 722 is provided on the front of the shell 721. When the external traction device 7 applies tension to the external connecting wire 6, the winding disk 722 is controlled to rotate by the knob assembly 724, so that the rope 723 is wound or unwound on the side wall of the winding disk 722, thereby adjusting the tension applied by the shell 721 to the external connecting wire 6, so that the extraoral traction device can appropriately adjust the traction force of the teeth according to the patient's own condition.

[0029] Reference Figure 1 , 5 The butt end of the rope 723 and the external connecting steel wire 6 is provided with a through hole, and the outer end of the hole of the external connecting steel wire 6 is set to a hook shape. Through this structural setting, when the external connecting steel wire 6 and the external traction device 7 are connected, the hook-shaped part of the external connecting steel wire 6 can be hooked into the through hole of the rope 723, thereby realizing the connection between the external connecting steel wire 6 and the external traction device 7, making the operation simple and quick.

[0030] Reference Figure 6The knob assembly 724 includes a main rotating column 725 and a polygonal ring 728. The back end of the main rotating column 725 passes through the shell 721 and is connected to the winding disk 722. A polygonal axial hole is opened at the back end of the main rotating column 725, and a polygonal rod 727 is slidably sleeved in the polygonal axial hole. The front end of the polygonal rod 727 is fixedly connected to a cylindrical button 726. The polygonal ring 728 is fixedly connected to the front of the shell 721. The inner cavity shape of the cylindrical button 726 is adapted to the polygonal ring 728. When the cylindrical button 726 is in a sleeved state on the side wall of the polygonal ring 728, the cylindrical button 726 cannot rotate according to the shape characteristics of the polygonal ring 728. At this time, under the cooperation of the polygonal rod 727 and the main rotating column 725, the main rotating column 725 cannot rotate. Therefore, the knob assembly 724 can lock the winding disk 722. When the winding disk 722 needs to be controlled to rotate, the cylindrical button 726 is pulled to separate the cylindrical button 726 from the polygonal ring 728. At this time, the cylindrical button 726 loses the positioning effect of the polygonal ring 728, so that the cylindrical button 726 can rotate. Therefore, by rotating the cylindrical button 726 and the connection effect of the main rotating column 725 and the polygonal rod 727, the rotation of the winding disk 722 can be controlled.

[0031] Reference Figure 6 A tension spring is arranged in the polygonal shaft hole of the main rotating column 725, and the back end of the polygonal rod 727 is transmission-connected to the inner wall of the main rotating column 725 through the tension spring. By arranging the tension spring, the polygonal rod 727 can be prevented from falling off from the polygonal shaft hole of the main rotating column 725.

[0032] The working principle of the utility model is as follows: first, the bracket appliance is fixed to the teeth under the action of the bracket bodies 2 and the two orthodontic band rings 1, and the orthodontic wire 3 is connected with the bracket bodies 2 and the two orthodontic band rings 1 to apply tension to the teeth, so as to correct the uneven arrangement of teeth and the excessive gap between teeth. In this process, since the orthodontic wire 3 is in a U-shape and surrounds the teeth to apply force, it is very easy to cause the cheek teeth to shrink inwards. By setting the transverse palatal rod assembly 4, support can be formed between the two orthodontic band rings 1. Under the action of the transverse palatal rod assembly 4, the force of the cheek teeth shrinking inwards can be offset, thereby avoiding the condition of dental arch retraction.

[0033] On this basis, since the bracket appliance cannot apply backward pulling force to the teeth, that is, it cannot correct the condition of tooth protrusion, the two orthodontic band rings 1 are connected by the connecting arch 5 of the extraoral traction device, and the two external connecting steel wires 6 are pulled outside the mouth to apply force backwards by the external traction device 7. Since the two external connecting steel wires 6 are connected to the connecting arch 5, the connecting arch 5 applies backward pulling force to the two orthodontic band rings 1, so that the bracket appliance as a whole has a backward force, thereby achieving the correction effect of tooth protrusion.

[0034] The basic principles, main features and advantages of the present utility model have been shown and described above. The present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, there will be various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An appliance based on a transverse palatal rod and extraoral traction, comprising a bracket appliance, the bracket appliance comprising two orthodontic bands (1), a plurality of bracket bodies (2), and an orthodontic wire (3), the plurality of bracket bodies (2) being fixed on a plurality of teeth respectively, the two orthodontic bands (1) being respectively sleeved on two molars, the plurality of bracket bodies (2) being connected to the two orthodontic bands (1) via an orthodontic wire (3), characterized in that: The invention comprises an extraoral traction device, the extraoral traction device is composed of a connecting arch (5), two external connecting steel wires (6), and an external traction device (7), the two ends of the connecting arch (5) are respectively fixedly connected to the outside of two orthodontic band rings (1), the connecting arch (5) is U-shaped and half-surrounds a plurality of teeth, the two external connecting steel wires (6) are fixedly connected to the side wall of the connecting arch (5), and the two external connecting steel wires (6) are symmetrical along the midpoint of the connecting arch (5), the other ends of the two external connecting steel wires (6) extend outside the mouth, and the external traction device (7) surrounds the head and docks with the extraoral ends of the two external connecting steel wires (6); It comprises a transverse palatal rod assembly (4), wherein the transverse palatal rod assembly (4) is fixedly connected between two orthodontic band rings (1).

2. The appliance based on transverse palatal rod and extraoral traction according to claim 1, characterized in that: The external tractor (7) comprises two ear hooks (71), the two ear hooks (71) are respectively hung on the two ears, the back ends of the two external tractors (7) are fixedly connected via an elastic band (73), the front ends of the ear hooks (71) are connected to a connector (72) via a connecting rod, and the two connectors (72) are respectively connected to two external steel wires (6).

3. The appliance based on transverse palatal rod and extraoral traction according to claim 1, characterized in that: The transverse palatal rod assembly (4) comprises a main transverse palatal rod (41), the two ends of the main transverse palatal rod (41) being fixedly connected to two end rods (43) via two telescopic members (42), and the outer ends of the two end rods (43) are fixedly connected to the inner side surfaces of two orthodontic band rings (1).

4. The appliance based on transverse palatal bar and extraoral traction according to claim 3, characterized in that: The transverse palatal rod assembly (4) comprises an end block (421) and a sleeve (422). The end block (421) and the side wall of the sleeve (422) are fixedly connected via two arc-shaped connecting plates (423). A rotary disk (424) is provided between the end block (421) and the sleeve (422). A polygonal sliding column (426) is slidably sleeved in the inner cavity of the sleeve (422). The shape of the polygonal sliding column (426) matches the shape of the inner cavity of the sleeve (422). A threaded rotating rod (425) is fixedly connected to one side of the rotary disk (424). The threaded rotating rod (425) penetrates into the inner cavity of the sleeve (422). The polygonal sliding column (426) is threadedly sleeved on the side wall of the threaded rotating rod (425). The end block (421) is fixedly connected to the end rod (43). One end of the polygonal sliding column (426) is fixedly connected to the main transverse palatal rod (41).

5. The appliance based on transverse palatal rod and extraoral traction according to claim 2, characterized in that: The connector (72) comprises a shell (721), the inner cavity of the shell (721) being movably sleeved with a winding reel (722), one side of the winding reel (722) being provided with a through slot communicating with the inner cavity of the winding reel (722), a rope (723) being wound around the side wall of the winding reel (722), one end of the rope (723) passing through the through slot to the outside of the shell (721) and docking with the external connecting steel wire (6), and the front side of the shell (721) being provided with a knob assembly (724) connected to the winding reel (722).

6. The appliance based on transverse palatal bar and extraoral traction according to claim 5, characterized in that: The butt end of the rope (723) and the external connecting steel wire (6) is provided with a through hole, and the outer end of the through hole of the external connecting steel wire (6) is arranged in a hook shape.

7. The appliance based on transverse palatal bar and extraoral traction according to claim 5, characterized in that: The knob assembly (724) comprises a main rotating column (725) and a polygonal ring (728). The back end of the main rotating column (725) passes through the housing (721) and is connected to the winding disk (722). The back end of the main rotating column (725) is provided with a polygonal shaft hole, in which a polygonal rod (727) is slidably sleeved. The front end of the polygonal rod (727) is fixedly connected to a cylindrical button (726). The polygonal ring (728) is fixedly connected to the front of the housing (721). The inner cavity shape of the cylindrical button (726) is adapted to the polygonal ring (728).

8. The appliance based on transverse palatal bar and extraoral traction according to claim 7, characterized in that: A tension spring is arranged in the polygonal shaft hole of the main body rotating column (725), and the back end of the polygonal rod (727) is transmission-connected to the inner wall of the main body rotating column (725) via the tension spring.

Images