A modified Nance bow for pulling canines
By adding a transverse palate rod and traction hook to the Nance bow, the palatal movement of the canine is achieved by using traction force, which solves the problem that the Nance bow cannot actively move the canine in the prior art, and realizes the three-dimensional directional movement of the canine and the tooth support of the canine The resistance is enhanced, and the device is simple and easy to produce.
Patent Information
- Application Number
- CN202110202573.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2021-02-22
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2041-02-22
AI Technical Summary
The existing Nance arch needs to be used in conjunction with a fixed orthodontic device to achieve tooth movement. It cannot actively apply force and is only used to enhance the posterior tooth resistance and cannot achieve effective movement of the canine.
On the basis of the Nance bow, the horizontal palate rod and two rearward traction hooks are added. The traction force generated by the traction hook and the elastic chain rubber chain can realize the palatal movement of the canine, without the need to use the power of the fixed orthodontic device to form a triangular structure To enhance support and vertical control.
The three-dimensional movement of the canine teeth is beautiful and efficient, and the teeth can be arranged without using a fixed orthodontic device, which enhances the support force of the teeth, and the device is simple and easy to make, suitable for 3D printing technology production.
Smart Images
Figure CN112972022B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oral orthodontic research, in particular to an improved Nance arch for pulling canines. Background Art
[0002] The Nance bow is an intraoral auxiliary device for enhancing support, and is often used in conjunction with a fixed appliance. In the prior art, the existing Nance bow needs to be used in conjunction with a fixed appliance to achieve the movement of the target tooth, and cannot actively exert force, and can only be used to enhance the support of the posterior teeth. Summary of the invention
[0003] In order to solve the above problems, the present invention provides a modified Nance bow for pulling canines. The device adds a transverse palatal rod on the basis of the Nance bow for vertical control, and adds two backward pulling hooks on the transverse palatal rod to move the labially ectopic canines distally and palatally at the same time, without the need for the power of a labial fixed appliance, and is efficient and beautiful.
[0004] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical scheme: an improved Nance bow for pulling canines, comprising bilateral first permanent molar band rings, a Nance bow, and a plastic base, wherein one end of the Nance bow is connected to the first permanent molar band ring, and the other end is connected to the plastic base, and is characterized in that a transverse palatal rod is provided in the middle of the first permanent molar, and both ends of the transverse palatal rod are connected to the bilateral first permanent molar band rings, the plastic base, the Nance bow and the transverse palatal rod form a triangular structure, a U-shaped curve is provided in the middle of the transverse palatal rod, which is bent away from the labial direction, and a pulling hook is symmetrically provided on the left and right sides of the U-shaped curve, and the free end of the pulling hook faces the first permanent molar band ring, and the lingual buckle is symmetrically bonded to the lingual side of the maxillary canine that needs to be moved palatally, and there are two horizontal fixing hooks with wings on the front of the lingual buckle, and a pulling wire is provided between the fixing hook on the left and the pulling hook on the right, and a pulling wire is provided between the fixing hook on the right and the pulling hook on the left.
[0005] Furthermore, the arch wire of the Nance arch is made of stainless steel wire with a diameter of 0.9-1.0 mm.
[0006] Furthermore, the transverse palatal bar is 3-4 mm away from the palate, and a vertical force is applied to the transverse palatal bar through the upward force of the tongue on the transverse palatal bar when the mouth is closed.
[0007] Furthermore, the plastic base has a thickness of 3-4 mm and is made of a hard material, and the plastic base remains in close contact with the upper palate.
[0008] Furthermore, the transverse palatal rod is made of a bent stainless steel wire with a diameter of 0.9-1.0 mm.
[0009] Furthermore, the traction wire is an elastic chain-shaped rubber chain, which generates 60-100g elastic traction force after being stretched.
[0010] Furthermore, the tongue side buckle is circular with a diameter of 2 mm and is made of stainless steel.
[0011] The beneficial effects of the present invention are:
[0012] 1. Add a transverse palatal rod to enhance support and achieve vertical control.
[0013] 2. Before bonding the fixed appliance, the labial ectopic canine can be moved distally and palatally, aligning the teeth and making them more beautiful, thus achieving an "invisible" effect.
[0014] 3. While moving the labial ectopic canine distally, it also moves it palatally, without the need for fixed appliances, thus achieving three-dimensional movement of the teeth, which is more efficient.
[0015] 4. The device is simple and easy to make. It can be made by 3D printing technology with high efficiency and precision. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a main structural schematic diagram of the present invention.
[0017] Among them, 1-first permanent molar band, 2-Nance arch, 3-plastic base, 4-transverse palatal rod, 5-U-shaped curve, 6-traction hook, 7-lingual buckle, 8-fixation hook, 9-traction wire. DETAILED DESCRIPTION
[0018] The following is combined with Figure 1 The preferred embodiments of the present invention are described in detail so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.
[0019] A modified Nance bow for pulling canines, comprising a first permanent molar band ring 1 on both sides, a Nance bow 2, and a plastic base 3, wherein one end of the Nance bow is connected to the first permanent molar band ring, and the other end is connected to the plastic base, and is characterized in that a transverse palatal rod 4 is provided in the middle of the first permanent molar, and both ends of the transverse palatal rod are connected to the first permanent molar band ring 1 on both sides, the plastic base, the Nance bow and the transverse palatal rod form a triangular structure, a U-shaped curve 5 is provided in the middle of the transverse palatal rod and is bent away from the labial direction, and a pulling hook 6 is symmetrically provided on the left and right sides of the U-shaped curve, and the free end of the pulling hook faces the first permanent molar band ring, and the lingual buckle 7 is symmetrically arranged on the lingual side of the maxillary anterior teeth that need to be moved toward the palate, and the lingual buckle is on A fixing hook 8 is provided, a traction wire 9 is provided between the fixing hook on the left and the traction hook on the right, and a traction wire is provided between the fixing hook on the right and the traction hook on the left. The arch wire of the Nance arch is made of stainless steel wire with a diameter of 0.9-1.0mm. The transverse palatal bar 4 is 3-4mm away from the palate. The tongue exerts a vertical force on the transverse palatal bar by pushing it upward when the mouth is closed. The thickness of the plastic base 3 is 3-4mm and it is a hard material. The plastic base remains tightly attached to the upper palate. The transverse palatal bar 4 is bent with a diameter of 0.9-1.0mm. The traction wire 9 is an elastic chain-shaped rubber chain, which generates an elastic traction force of 60-100g after stretching. The tongue side buckle 7 is a circle with a diameter of 2mm and is made of stainless steel.
[0020] This device can be made by first obtaining a tooth model, then making it on the model and then wearing it in the patient's mouth. It can also be made using 3D printing technology. First, directly scan the inside of the mouth to obtain the patient's teeth and oral soft tissue data, then use software to design a specific device, and finally directly 3D print the finished product. The plastic base of the palate can be directly made on the 3D printed metal bracket. The characteristic of 3D printing is that it can be personalized and accurately made according to different patients. It can be obtained directly next to the dental chair, which is fast and efficient. When installing this device, glass ion adhesive is applied to the inner side of the two first permanent molar band rings, and then it is placed on the molars for curing. At this time, the plastic base of the Nance arch is close to the palatal mucosa, and the transverse palatal rod is 3-4mm away from the palatal mucosa. Use adhesive to bond the lingual buckle to the lingual side of the canine. The U-shaped curve in the middle of the transverse palatal bar can better adjust the elasticity of the transverse palatal bar. The lingual buckle and the hook on the Nance arch are connected to each other by traction wire. The traction force of 60-100g is applied by the elastic force of the traction wire to move the labial ectopic canine distally to the palate. The fixed hook on the lingual buckle and the traction hook on the transverse palatal bar are used to facilitate the installation or removal of the traction wire, and to facilitate the replacement of the traction wire every month. The plastic base, Nance arch and transverse palatal bar form a triangular structure, which is firm and stable and convenient for applying correction torque. This device assists in adding the transverse palatal bar to enhance the support and realize vertical control. Before the fixed appliance is bonded, the distal palatal movement of the labial ectopic canine can be achieved, the teeth are aligned, and the effect of "invisibility" is achieved. While the labial ectopic canine is moved distally, it is moved palatally without the help of the power of the labial fixed appliance, and the three-dimensional movement of the teeth is achieved, which is more efficient. The device is simple and easy to make. It can be made by 3D printing technology, which is efficient and accurate.
[0021] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.
Claims
1. A modified Nance arch for pulling canines, comprising a first permanent molar band ring on both sides, a Nance arch, and a plastic base, wherein one end of the Nance arch is connected to the first permanent molar band ring, and the other end is connected to the plastic base, Features: A transverse palatal bar is provided in the middle of the first permanent molar, and the two ends of the transverse palatal bar are connected to the first permanent molar band rings on both sides. The plastic base, Nance arch and the transverse palatal bar form a triangular structure. The transverse palatal bar is 3-4mm away from the palate, and a vertical force is applied to the transverse palatal bar through the upward force of the tongue on the transverse palatal bar when the mouth is closed; a U-shaped curve is provided in the middle of the transverse palatal bar, which is bent away from the labial direction, and a traction hook is symmetrically provided on the left and right sides of the U-shaped curve, and the free end of the traction hook faces the first permanent molar band ring, and the lingual buckle is symmetrically bonded to the lingual side of the maxillary canine that needs to be moved toward the palate, and there are two horizontal fixing hooks with wings on the front of the lingual buckle, and a traction wire is provided between the fixing hook on the left and the traction hook on the right, and a traction wire is provided between the fixing hook on the right and the traction hook on the left; The traction wire is an elastic chain-shaped rubber chain, which generates an elastic traction force of 60-100g after being stretched.
2. A modified Nance arch for pulling canines according to claim 1, Features: The archwire of the Nance arch is made of stainless steel wire with a diameter of 0.9-1.0 mm.
3. The improved Nance arch for pulling canines according to claim 1, Features: The plastic base has a thickness of 3-4 mm and is made of a hard material. The plastic base is kept in close contact with the upper palate.
4. The improved Nance arch for pulling canines according to claim 1, Features: The transverse palatal rod is made of a stainless steel wire with a diameter of 0.9-1.0 mm.
5. The improved Nance arch for pulling canines according to claim 1, Features: The tongue side buckle is circular with a diameter of 2 mm and is made of stainless steel.