Improved orthodontic device suitable for bimaxillary prolapse

Abstract

The utility model belongs to an improved orthodontic device suitable for double-jaw prolapse. The utility model aims to solve the problems that the anchorage control difficulty is high in the process of correcting the double-jaw proprocess, the side effect of molar loss anchorage is large, the correction of a patient is uncomfortable, and the operation is tedious. According to the technical key points, upper and lower central incisor teeth, lateral incisor teeth, canine teeth and first permanent molar teeth are bonded with a common transmission appliance bracket; the upper jaw round wire main arch wire and the lower jaw round wire main arch wire are in an arc shape, are provided with two small circles and two rear bends and penetrate through a groove in a bracket of an ordinary transmission appliance, and the upper anterior tooth adduction leather ring is connected with the small circles on the upper jaw round wire main arch wire and anchorage molar teeth of the lower jaw. And the lower anterior tooth adduction leather collar is connected with the small loop on the round wire main arch wire of the lower jaw and the anchorage molar of the upper jaw. The device is suitable for orthodontic treatment of double-jaw prolapse cases.

Description

Technical Field

[0001] This utility model relates to an improved orthodontic device suitable for bimaxillary protrusion. Background Technology

[0002] Bimaxillary protrusion is a common malocclusion in clinical practice, mainly characterized by protrusion of the upper and lower jaws. In actual treatment, it is more common to see protrusion of both dental arches accompanied by abnormal positioning of the upper and lower jaws. The typical features of bimaxillary protrusion are relatively neat dentition and less crowding, but significant labial inclination of the upper and lower anterior teeth axes, resulting in open lips, chin retrusion, and a convex facial profile, leading to disharmony and poor aesthetics. For patients with bimaxillary protrusion but no severe jaw deformity who wish to improve their profile, orthodontic camouflage treatment is often used. This involves extracting premolars to create space, using the extraction space to retract the protruding upper and lower incisors, and improving the position of the upper and lower lips, thereby achieving a harmonious and aesthetically pleasing profile. The key to the success of this treatment lies in effective sagittal anchorage control; good anchorage control is crucial for achieving a satisfactory profile. Currently used anchorage control methods include implants, extraoral arches, and Nance arches. While these traditional anchorage devices are effective, they have certain limitations. Implant anchorage is an invasive treatment method, carrying the risk of root damage. Extraoral arches and Nance arches, due to their strong foreign body sensation, can easily cause patient discomfort. Therefore, in recent years, the orthodontic field has gradually explored simpler, more comfortable, and more effective anchorage control methods. These methods fully utilize the patient's own oral structure for biomechanical design without the use of external anchorage devices, thereby reducing discomfort and improving treatment acceptability. Light force orthodontic treatment refers to applying orthodontic forces between 50 and 100g. This force value effectively induces alveolar bone remodeling around the teeth while avoiding rapid bone destruction or inflammatory responses. It not only ensures that teeth move along the intended path but also reduces side effects such as root resorption and periodontal tissue damage caused by excessive force. In contrast, excessive orthodontic forces (>100g) may cause periodontal ligament blood flow obstruction, leading to latent resorption and thus delaying tooth movement. Furthermore, heavy force orthodontic treatment may lead to loss of posterior tooth anchorage and a significantly increased risk of root resorption, which is detrimental to the stability and safety of the treatment outcome. In the past, without external anchorage, orthodontists typically employed a "Z-shaped" traction strategy, applying mesiodistal closing forces within the upper and lower jaws, supplemented by Class II or Class III traction. However, this method has several drawbacks. In conventional orthodontic treatment, a single Class II or Class III traction band exerts approximately 60g of traction force. Using two bands attached to the abutment teeth can generate a total traction force of up to 150g. Mandibular movement during chewing or speaking further increases the traction force of the oblique bands, rising from 60g to 70-80g, thus bringing the total traction force to 150-220g. Excessive traction can cause posterior teeth to shift forward, leading to some degree of anchorage loss. Furthermore, patients need to change six bands daily, undoubtedly increasing the complexity of the treatment process and the burden on patient compliance.In conclusion, to further improve the effectiveness of bimaxillary protrusion correction, reduce the side effects of molar loss anchorage, and improve patient comfort, it is necessary to provide a simpler and more controllable bimaxillary protrusion correction device and method. Utility Model Content

[0003] The purpose of this invention is to propose an improved orthodontic appliance suitable for bimaxillary protrusion, addressing the problems of difficulty in anchorage control during bimaxillary protrusion correction, significant side effects from molar anchorage loss, patient discomfort, and cumbersome operation. The technical solution adopted to solve this problem is: an improved orthodontic appliance suitable for bimaxillary protrusion, characterized by: bonding ordinary transmission appliance brackets to the upper and lower central incisors, lateral incisors, canines, and first permanent molars; the maxillary archwire, including two small loops and two backward tilts, is arc-shaped, with the two small loops corresponding to the spaces between the maxillary lateral incisors and canines on the left and right sides, and the two backward tilts corresponding to the maxillary anchorage molars or mesial segments on both sides; including two small loops and two... The mandibular archwire with its backward tilt is also arc-shaped, with two small loops corresponding to the spaces between the left and right mandibular lateral incisors and canines, respectively. The two backward tilts correspond to the mesial positions of the bilateral mandibular anchorage molars or molar segments. The two mandibular archwires pass through the grooves on the brackets of the standard orthodontic appliance. An inward retraction loop connects the small loops on the mandibular archwire to the mandibular anchorage molars, and a similar loop connects the small loops on the mandibular archwire to the mandibular anchorage molars. The two backward tilts correspond to the mesial positions of the bilateral mandibular anchorage molars or molar segments, and are located 3 to 5 millimeters from the mesial position of the anchorage molars or molar segments. The canine bracket wings of the standard orthodontic appliance have an 18° chamfer to increase the clearance of the archwire in the grooves during treatment. The upper and lower anterior retraction bands are configured with force ranges based on the occlusal relationship and anchorage requirements of the first permanent molars. When the molars are in a neutral to mesial or mesial relationship, the upper anterior retraction band is configured with a force range of 50-60g, and the lower anterior retraction band is configured with a force range of 60-70g. When the molars are in a neutral to distal or distal relationship, the upper anterior retraction band is configured with a force range of 60-70g, and the lower anterior retraction band is configured with a force range of 50-60g.

[0004] The main bow wire is made of stainless steel or Australian wire to ensure sufficient elasticity and strength.

[0005] (In dentistry, the mesial side of a tooth crown is the side closer to the midline. The distal side of a tooth crown is the side farther from the midline.)

[0006] A method for correcting bimaxillary protrusion using an improved orthodontic appliance as described above, characterized by comprising the following steps:

[0007] Step A: Bracket bonding: Bond the upper and lower central incisors, lateral incisors, canines, and first permanent molars to the brackets of the standard drive-type orthodontic appliance;

[0008] Step B: Archwire bending: Use stainless steel or Australian wire to bend the main archwires of the maxilla and mandible. Both the main archwires of the maxilla and mandible include two small loops and two backward bends, and their bending positions can be adjusted as needed.

[0009] Step C: Elastic band installation: Select an elastic band with an appropriate force value according to the patient's occlusal relationship. The force value range for the upper anterior retraction band is 50~70g, and the force value range for the lower anterior retraction band is 50~70g. The specific force value can be adjusted according to the anchorage requirements.

[0010] Step D Orthodontic Process: The upper anterior teeth retraction band connects the small loops on the main archwire of the maxilla to the anchorage molars of the mandible, and the lower anterior teeth retraction band connects the small loops on the main archwire of the mandible to the anchorage molars of the maxilla, so as to achieve continuous and stable sagittal light force, gradually retracting the anterior teeth, adjusting the position of the upper and lower lips, and improving the facial profile.

[0011] Among them, 0.016-inch or 0.018-inch stainless steel or Australian wire is used to bend the upper and lower jaw round wire main archwire.

[0012] The beneficial effects of this invention compared to existing technologies are as follows: Firstly, it optimizes anchorage control: through the mechanical combination design of the elastic bands, there is no need for additional micro-implants or extraoral anchorage devices, reducing patient discomfort. Secondly, it allows for personalized adjustment: the force value of the elastic bands can be flexibly adjusted according to the patient's occlusal relationship, ensuring efficiency and precision during treatment. Thirdly, it improves comfort: the orthodontic device has a simple design, is easy to operate, and has high patient compliance, effectively reducing treatment side effects. This invention provides an innovative and effective solution for orthodontic treatment of bimaxillary protrusion, with good application prospects and clinical value. Further analysis reveals the following specific advantages: 1. Molars withstand 60g of force, with both horizontal and vertical forces less than 60g, better protecting posterior tooth anchorage. 2. It provides a vertical elongation component force to the anterior teeth, helping to establish occlusion in cases of open bite due to protrusion. 3. Cross-traction can be flexibly adjusted according to intraoral conditions. 4. For short posterior tooth crowns, this traction method can elongate the posterior teeth and open the bite. 5. Light force correction does not cause the back teeth to move forward. 6. Two elastic bands are crossed, resulting in combined force. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of the utility model in use. Detailed Implementation

[0014] Example: Reference Figure 1 An improved orthodontic appliance suitable for bimaxillary protrusion is characterized by: a standard transmission appliance bracket 1 bonded to the upper and lower central incisors, lateral incisors, canines, and first permanent molars; a maxillary round wire archwire 2, comprising two small loops 3 and two backward tilts 4, is arc-shaped, with the two small loops 3 corresponding to the spaces between the maxillary lateral incisors and canines on the left and right sides, respectively, and the two backward tilts 4 corresponding to the mesial segments of the maxillary anchorage molars or molar segments on both sides; a mandibular round wire archwire 2, also comprising two small loops 3 and two backward tilts 4, is similarly arc-shaped, with the two small loops 3 corresponding to the spaces between the mandibular lateral incisors and canines on the left and right sides, respectively, and the two backward tilts 4 corresponding to the spaces between the mandibular anchorage molars or molar segments on both sides. The molars or molar segments are mesial; two round wire archwires 2 of the upper and lower jaws pass through the grooves on the brackets 1 of the standard transmission orthodontic appliance; the upper anterior retraction loop 5 connects the small loop 3 on the round wire archwire 2 of the upper jaw to the anchorage molars of the lower jaw, and the lower anterior retraction loop 6 connects the small loop 3 on the round wire archwire 2 of the lower jaw to the anchorage molars of the upper jaw; the two posterior tilts 4 correspond to the mesial of the bilateral mandibular anchorage molars or molar segments, respectively, and are 3 mm to 5 mm away from the mesial of the anchorage molars or molar segments; the canine bracket wings of the standard transmission orthodontic appliance 1 are provided with an 18° chamfer to increase the clearance of the round wire archwire 2 in the grooves during the orthodontic process; the upper anterior retraction loop 5 The force range of the upper anterior retraction band 5 and the lower anterior retraction band 6 is set according to the occlusal relationship and anchorage requirements of the first permanent molar. When the molar is in a neutral to mesial relationship or a mesial relationship, the force range of the upper anterior retraction band 5 is 50~60g, and the force range of the lower anterior retraction band 6 is 60~70g; when the molar is in a neutral to distal relationship or a distal relationship, the force range of the upper anterior retraction band 5 is 60~70g, and the force range of the lower anterior retraction band 6 is 50~60g. The round wire archwire 2 is made of stainless steel or Australian wire to ensure sufficient elasticity and strength.

[0015] A method for correcting bimaxillary protrusion using an improved orthodontic appliance as described above, characterized by comprising the following steps:

[0016] Step A: Bracket bonding: Bond the upper and lower central incisors, lateral incisors, canines, and first permanent molars to the standard drive-type orthodontic bracket 1;

[0017] Step B: Archwire bending: Use stainless steel or Australian wire to bend the maxillary and mandibular round wire main archwires 2. Both the maxillary and mandibular round wire main archwires 2 include two small loops 3 and two backward tilting bends 4, and adjust their bending positions as needed.

[0018] Step C: Elastic band installation: Select an elastic band with an appropriate force value according to the patient's occlusal relationship. Set the force value range of the upper anterior retraction band 5 to 50~70g, and the force value range of the lower anterior retraction band 6 to 50~70g. Adjust the force value according to the anchorage requirements.

[0019] Step D: Orthodontic process: The upper anterior teeth retraction band 5 connects the small loop 3 on the main archwire 2 of the maxilla to the anchorage molar of the mandible. The lower anterior teeth retraction band 6 connects the small loop 3 on the main archwire 2 of the mandible to the anchorage molar of the maxilla, so as to achieve continuous and stable sagittal light force, gradually retract the anterior teeth, adjust the position of the upper and lower lips, and improve the facial profile.

[0020] Among them, 0.016-inch or 0.018-inch stainless steel or Australian wire is used to bend the upper and lower jaw round wire main archwire 2.

Claims

1. An improved orthodontic device suitable for bimaxillary protrusion, characterized in that: The upper and lower central incisors, lateral incisors, canines and first permanent molars are bonded with ordinary type transmission appliance brackets (1); the maxillary round wire main arch wire (2) including two small circle curves (3) and two backward bending (4) is in circular arc shape, the two small circle curves (3) correspond to the upper lateral incisors and canines on the left and right sides respectively, and the two backward bending (4) correspond to the bilateral upper molar or molar segment mesial; the mandibular round wire main arch wire (2) including two small circle curves (3) and two backward bending (4) is also in circular arc shape, the two small circle curves (3) correspond to the lower lateral incisors and canines on the left and right sides respectively, and the two backward bending (4) correspond to the bilateral lower molar or molar segment mesial; the upper and lower maxillary round wire main arch wire (2) passes through the slot of the ordinary type transmission appliance bracket (1); the upper anterior tooth retraction coil (5) is connected with the small circle curve (3) on the upper maxillary round wire main arch wire (2) and the lower molar support, and the lower anterior tooth retraction coil (6) is connected with the small circle curve (3) on the lower mandibular round wire main arch wire (2) and the upper molar support.

2. The improved orthodontic device for bimaxillary protrusion according to claim 1, wherein: The two backward bending (4) correspond to the bilateral lower molar or molar segment mesial, and the distance from the molar or molar segment mesial is 3-5 mm.

3. The improved orthodontic device for bimaxillary protrusion according to claim 1 or 2, wherein: The canine bracket wing of the ordinary type transmission appliance bracket (1) is provided with a 18° cutting angle to increase the clearance of the round wire main arch wire (2) in the slot during the treatment process.

4. The improved orthodontic device for bimaxillary protrusion according to claim 1 or 2, wherein: The upper anterior tooth retraction coil (5) and the lower anterior tooth retraction coil (6) set the force value range according to the occlusion relationship and support requirement of the first permanent molar, when the molar is in neutral or mesial relationship, the upper anterior tooth retraction coil (5) sets the force value range of 50-60 g, and the lower anterior tooth retraction coil (6) sets the force value range of 60-70 g; when the molar is in neutral or distal relationship, the upper anterior tooth retraction coil (5) sets the force value range of 60-70 g, and the lower anterior tooth retraction coil (6) sets the force value range of 50-60 g.

5. The improved orthodontic device for bimaxillary protrusion of claim 3, wherein: The upper anterior tooth retraction coil (5) and the lower anterior tooth retraction coil (6) set the force value range according to the occlusion relationship and support requirement of the first permanent molar, when the molar is in neutral or mesial relationship, the upper anterior tooth retraction coil (5) sets the force value range of 50-60 g, and the lower anterior tooth retraction coil (6) sets the force value range of 60-70 g; when the molar is in neutral or distal relationship, the upper anterior tooth retraction coil (5) sets the force value range of 60-70 g, and the lower anterior tooth retraction coil (6) sets the force value range of 50-60 g.

6. The improved orthodontic device for bimaxillary protrusion according to claim 1 or 2, wherein: The round wire main arch wire (2) is made of stainless steel or Australian wire to ensure sufficient elasticity and strength.

7. The improved orthodontic device for bimaxillary protrusion of claim 3, wherein: The round wire main arch wire (2) is made of stainless steel or Australian wire to ensure sufficient elasticity and strength.

8. The improved orthodontic device for bimaxillary protrusion of claim 4, wherein: The round wire main arch wire (2) is made of stainless steel or Australian wire to ensure sufficient elasticity and strength.

Images