A personalized mandibular forward pull device for mandibular retrognathia

Abstract

This invention provides a personalized mandibular anterior traction device for treating mandibular retrusion deformity in adolescents. The device includes a personalized mandibular traction titanium plate and a mandibular anterior traction bracket. The personalized traction titanium plate is fixed to the mandible with screws and connected to the mandibular anterior traction bracket via traction hooks to apply traction force. The titanium plate of this invention is precisely customized using 3D printing technology, perfectly adapting to the patient's bone morphology. It is small and lightweight, minimizing intraoperative trauma and improving surgical efficiency. The design of the titanium plate and traction hooks allows for precise adjustment of the direction and magnitude of the traction force, effectively promoting mandibular bone growth and inhibiting adverse dental effects. The device can be used in conjunction with orthodontic appliances to align teeth while tractioning the mandible, shortening the overall orthodontic treatment cycle. The device is easy to operate and can be adjusted according to the patient's individual needs, facilitating clinical application and promotion.

Description

Technical Field

[0001] This invention relates to the field of orthodontic technology, specifically to a personalized mandibular anterior traction device for mandibular retrusion. Background Technology

[0002] Class II skeletal malocclusion is mainly characterized by mandibular retrusion, with a high prevalence in my country, severely affecting facial aesthetics and oral function. Early clinical treatment often relies on functional appliances. However, existing appliances generally suffer from problems such as large size, strong foreign body sensation, poor retention, and dependence on patient cooperation, leading to poor comfort, unstable efficacy, and a tendency to cause dental noise such as compensatory labial tipping of the lower anterior teeth and mesial tilting of the lower posterior teeth. Therefore, there is an urgent need for a new type of anterior mandibular traction device that uses skeletal anchorage to efficiently guide the mandible forward, is comfortable to wear, and has stable retention, in order to improve patient compliance and treatment outcomes.

[0003] Since jawbone shapes vary from person to person, titanium plate design must be personalized. Current conventional titanium plate manufacturing technologies, such as traditional subtractive manufacturing techniques (CNC machining, etc.) or casting from molds, suffer from low precision, low efficiency, and low personalization. Digital modeling and modern additive manufacturing technology (3D printing) can achieve highly complex porous, hollow, and personalized structures. Personalized titanium plates can be designed and manufactured preoperatively based on the patient's CT data, achieving a perfect fit with the bone. Summary of the Invention

[0004] To address the problems existing in the background art, the present invention provides a personalized mandibular anterior traction device for mandibular retrusion. The present invention can avoid the dental compensatory tilting caused by traditional mandibular forward guiding functional appliances, and can also perform fixed orthodontics by setting orthodontic appliances to align teeth while performing anterior traction, thereby improving the orthodontic effect and efficiency.

[0005] The technical solution adopted in this invention is as follows: A personalized mandibular anterior traction device for mandibular retrusion includes: a personalized mandibular traction titanium plate and a mandibular anterior traction bracket. The personalized mandibular traction titanium plate includes: a titanium plate, screw holes, a traction hook, and a round hole. The titanium plate is designed using 3D printing technology. The screw holes are formed on the titanium plate, and the titanium plate is fixed to the mandible by screws passing through the screw holes. The round hole is formed at the front end of the titanium plate. The traction hook is set at the front of the titanium plate and is connected to the titanium plate through the round hole. The mandibular anterior traction bracket is set at the front of the mandible. The traction hook and the mandibular anterior traction bracket are connected to each other for traction of the mandible forward.

[0006] Furthermore, the mandibular anterior traction bracket includes a connecting rod, a slot rod, a forehead rest, a forehead rest position adjuster, and an elastic band. The upper and middle parts of the connecting rod are respectively provided with a forehead rest position adjuster and a slot rod that slide relative to the connecting rod. The forehead rest is connected to the forehead rest position adjuster and can be adjusted to fit the facial proportions of different patients by sliding up and down and locking. The slot rod can be adjusted to a suitable position and locked according to the facial shape of different patients by sliding up and down, adjusting the traction height and direction of the device. One end of the elastic band is fixed to the slot rod, and the other end is connected to the traction hook, realizing the connection between the personalized mandibular traction titanium plate and the mandibular anterior traction bracket.

[0007] Furthermore, the groove rod is provided with several grooves, which are used to adjust the traction force by inserting the rubber band into any groove.

[0008] Furthermore, the screw hole has three holes, avoiding the tooth root and related soft tissue.

[0009] Furthermore, the titanium plate is made of Ti-6Al-4V alloy material.

[0010] Furthermore, the titanium plate is disposed on the patient's mandibular ramus or the external surface of the mandible.

[0011] The present invention has the following beneficial effects: This invention provides a personalized mandibular anterior traction device that induces new bone formation through stable and slow traction force, while simultaneously promoting adaptive expansion of surrounding soft tissues (muscles, blood vessels, nerves). During the peak growth and development period, it promotes efficient forward and upward growth of the mandible, resulting in an ideal facial shape and solving the problem of mandibular retrusion.

[0012] This invention provides a personalized mandibular anterior traction device that utilizes the growth potential of the mandible during its peak growth period, eliminating the need for implanting a large amount of artificial materials. Through personalized design and digital technology, it achieves precise treatment. The titanium plate is precisely customized using 3D printing technology, perfectly adapting to the patient's bone morphology. It is small and lightweight, resulting in minimal intraoperative trauma and improved surgical efficiency.

[0013] The design of the titanium plate and traction hook in this invention can precisely adjust the direction and magnitude of the traction force, effectively promoting mandibular bone growth and inhibiting adverse dental effects. The device of the present invention can be used in conjunction with orthodontic devices to align teeth while pulling the mandible, thus shortening the entire orthodontic treatment cycle. The device of this invention is easy to operate and can be adjusted according to the individual needs of patients, making it convenient for clinical application and promotion. Attached Figure Description

[0014] Figure 1 The present invention relates to a personalized anterior traction titanium plate for the mandible; Figure 2The present invention is a mandibular anterior traction bracket; Figure 3 This is a schematic diagram of the placement of the personalized traction titanium plate for the mandible according to the present invention.

[0015] In the diagram, 101 is a titanium plate; 102 is a screw hole; 103 is a traction hook; 104 is a round hole; 201 is a connecting rod; 202 is a slot rod; 203 is a forehead support; 204 is a forehead support position adjuster; and 205 is a rubber band. Detailed Implementation

[0016] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0017] The design of a personalized mandibular traction titanium plate includes the following steps: The first step is to obtain three-dimensional structural data of the patient's oral surface through an intraoral scanner, and to obtain three-dimensional data of the patient's jawbone and teeth through cone-beam computed tomography (CBCT). The second step is to import the three-dimensional structural data of the patient's oral surface obtained by the intraoral scanner and the three-dimensional data of the patient's jawbone and teeth obtained by cone-beam CT into the three-dimensional modeling software (Mimics) for data overlay and to reconstruct the three-dimensional model of the patient's jawbone and teeth. The third step involves designing the traction device in 3D using CAD modeling software, based on the patient's surface 3D structural features and the 3D anatomical features of the jawbone and teeth. Using the patient's jawbone 3D model, the position and length / width boundaries of the titanium plate 101 in the traction device are confirmed. The thickness of the titanium plate 101 is 2 mm, thus completing the 3D design of the titanium plate 101. Using the tooth 3D model, the position of the fixing screws in the traction device is confirmed. The screw holes 102 must avoid the tooth root and related soft tissues. Three screw holes 102 are designed, each with a diameter of 2 mm, thus generating screw holes 102 of corresponding size and orientation. Based on the patient's oral cavity surface 3D model and jawbone model, the thickness of the labial mucosa is confirmed, and the length of the straight portion of the traction hook 103 is designed, thus completing the 3D design of the traction hook 103. The two components are then assembled into a single unit, generating the final 3D design file for the traction device. The fourth step is to import the 3D design file of the traction device completed above into CAM software and use 3D printing equipment to manufacture it.

[0018] This invention provides a personalized mandibular anterior traction device, comprising a personalized mandibular traction titanium plate and a mandibular anterior traction bracket. The personalized mandibular traction titanium plate includes a titanium plate 101, screw holes 102, and traction hooks 103. The titanium plate 101 is personalized using 3D printing technology and is used to fix it to the mandible. There are three screw holes 102 located on the titanium plate 101. The titanium plate 101 is connected to the mandible by screws to ensure the stability of the titanium plate 101 and prevent displacement during traction. The traction hooks 103 are located in front of the titanium plate 101 and are connected to the titanium plate 101 through round holes 104 for applying traction force. The traction hooks 103 can be stretched or relaxed according to the patient's treatment progress to control the magnitude and direction of the traction force. The mandibular anterior traction bracket includes a connecting rod 201, a slot rod 202, a forehead support 203, a forehead support position adjuster 204, and an elastic band 205. The upper and middle parts of the connecting rod 201 are respectively provided with the forehead support position adjuster 204 and the slot rod 202, which can slide relative to the connecting rod 201. The slot rod 202 can slide up and down and lock to adjust the traction height. The forehead support 203 is connected to the forehead support position adjuster 204, can slide up and down and lock to adapt to the facial proportions of different patients. The elastic band 205 can be fixed in the slot on the slot rod 202 and connected to the traction hook 103 to realize the connection between the personalized mandibular traction titanium plate and the mandibular anterior traction bracket.

[0019] In one specific embodiment of the present invention, the positioning of the personalized mandibular traction titanium plate is determined by the doctor and is surgically inserted into the patient's mandibular ramus or the external surface of the mandible.

[0020] As a specific embodiment of the present invention, the personalized traction titanium plate for the mandible is made of Ti-6Al-4V alloy material and is manufactured in one step using 3D printing equipment.

[0021] In one specific embodiment of the present invention, the mandibular anterior traction bracket is worn on the patient's face. The position of the forehead brace 203 is adjusted to fit the forehead and locked. The height of the slot rod 202 is adjusted to the target traction position and locked. The rubber band 205 is connected to the slot rod 202 and the traction hook 103. The stretching degree of the rubber band 205 is adjusted according to the treatment plan to apply appropriate traction force. During the treatment, the magnitude and direction of the traction force can be dynamically adjusted by adjusting the position of the slot rod 202, the stretching amount of the rubber band 205, or the state of the traction hook 103 until the traction correction of the mandible is completed.

[0022] In summary, the personalized mandibular anterior traction device of this invention, through personalized design and 3D printing technology, provides a personalized mandibular traction titanium plate that fits well with the patient's bone structure, minimizes intraoperative damage, shortens surgical time, and improves surgical efficiency.

[0023] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A personalized mandibular anterior traction device for mandibular retrusion, characterized in that, include: Personalized mandibular traction titanium plate and mandibular anterior traction brace; The personalized mandibular traction titanium plate includes: a titanium plate, screw holes, a traction hook, and a round hole. The titanium plate is designed using 3D printing technology. The screw holes are formed on the titanium plate, and screws pass through the screw holes to fix the titanium plate to the mandible. The round hole is formed at the front end of the titanium plate. The traction hook is located at the front of the titanium plate and is connected to the titanium plate through the round hole. The mandibular anterior traction bracket is located at the front of the mandible. The traction hook and the mandibular anterior traction bracket are connected to each other for tractioning the mandible forward.

2. A personalized mandibular anterior traction device for mandibular retrusion according to claim 1, characterized in that, The mandibular anterior traction bracket includes a connecting rod, a slotted rod, a forehead rest, a forehead rest position adjuster, and an elastic band. The upper and middle parts of the connecting rod are respectively provided with a forehead rest position adjuster and a slotted rod that slide relative to the connecting rod. The forehead rest is connected to the forehead rest position adjuster and can be adjusted and locked by sliding up and down to adapt to the facial proportions of different patients. The slotted rod can be adjusted to a suitable position and locked by sliding up and down according to different patients' facial shapes, adjusting the traction height and direction of the device. One end of the elastic band is fixed to the slotted rod, and the other end is connected to the traction hook, realizing the connection between the personalized mandibular traction titanium plate and the mandibular anterior traction bracket.

3. A personalized mandibular anterior traction device for mandibular retrusion according to claim 2, characterized in that, The groove rod is provided with several grooves, which are used to adjust the traction force by inserting the rubber band into any groove.

4. A personalized mandibular anterior traction device for mandibular retrusion according to claim 1, characterized in that, The screw hole has three openings, avoiding the tooth root and related soft tissue.

5. A personalized mandibular anterior traction device for mandibular retrusion according to claim 1, characterized in that, The titanium plate is made of Ti-6Al-4V alloy material.

6. A personalized mandibular anterior traction device for mandibular retrusion according to claim 1, characterized in that, The titanium plate is placed on the patient's mandibular ramus or the outer surface of the mandible.

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