Orthodontic operation occlusion guide plate based on invisible orthodontic device

Abstract

The utility model relates to an orthodontic operation occlusion guide plate based on an invisible orthodontic device, which comprises a middle occlusion guide plate and a terminal occlusion guide plate, the middle occlusion guide plate is used for determining the middle occlusion relationship between an upper jaw tooth bone section and a lower jaw tooth bone section at an initial position, and the terminal occlusion guide plate is used for determining the terminal occlusion relationship between the upper jaw tooth bone section and the lower jaw tooth bone section. The middle occlusion guide plate is integrally formed by a first upper contact surface, a first lower contact surface and a connecting part, a first upper tooth occlusion position is arranged on the first upper contact surface, a first lower tooth occlusion position is arranged on the first lower contact surface, and the end occlusion guide plate is integrally formed by combining a second upper contact surface and a second lower contact surface; a second upper tooth occlusion position is arranged on the second upper contact surface, and a second lower tooth occlusion position is arranged on the second lower contact surface. According to the utility model, the anterior tooth area is not fully covered, the resistance and difficulty during dislocation and in-position are reduced, the operation time is saved, the observation window is arranged, the situation that the dentition is not in place is avoided, and the operation precision is ensured.

Description

Technical Field

[0001] The utility model relates to an orthognathic surgery occlusal guide plate based on an invisible orthodontic device. Background Art

[0002] Severe dentofacial deformities often lead to malocclusion, disordered occlusion, masticatory dysfunction, and unsightly facial shape. It is difficult to achieve ideal treatment results for such deformities through orthodontic means alone, and often requires combined orthodontic and orthognathic treatment. Preoperative orthodontic treatment removes tooth compensation, orthognathic surgery moves the jaw bone to correct jaw deformity, and postoperative orthodontic treatment finely adjusts the occlusion. Traditional fixed appliances are increasingly unable to meet the needs of patients due to their shortcomings such as lack of beauty, poor comfort, and difficulty in maintaining oral hygiene.

[0003] Bracketless invisible orthodontic technology, also often referred to as invisible correction technology, is a method of correcting tooth alignment using transparent, removable plastic appliances. Compared with traditional metal brackets or ceramic brackets, bracketless invisible orthodontic appliances have the advantages of being beautiful, comfortable, easy to maintain oral hygiene, and predictable efficacy. At the same time, bracketless invisible orthodontic appliances are customized based on the three-dimensional scanning data of the patient's mouth, and can gradually guide the teeth to move to the desired position. During the entire digital treatment process, orthodontists can have a more comprehensive grasp of the movement of teeth, and patients can also have a certain understanding and knowledge of the entire treatment process through simulated animations. Therefore, more and more patients undergoing orthodontic and orthognathic combined treatment require the use of bracketless invisible orthodontics. Correspondingly, the application of bracketless invisible orthodontics in orthodontic and orthognathic combined treatment is becoming more and more extensive.

[0004] Although bracketless invisible technology has brought a technological revolution to preoperative orthodontic treatment, this change has also brought some clinical problems to maxillofacial surgeons: For patients using traditional fixed orthodontic devices, in the traditional method, we can use stainless steel wire for intermaxillary fixation between the maxillary and mandibular orthodontic archwires during surgery, and use the traditional non-dental covering intermediate occlusal guide and terminal occlusal guide to fix the maxillary and mandibular dental bone segments at the target position. Patients with bracketless invisible orthodontics do not have orthodontic archwires in their mouths. How to perform intermaxillary fixation during surgery to fix the maxillary and mandibular dental bone segments? Currently, the commonly used methods in clinical practice are mainly dental arch splints and intermaxillary traction pins, but both methods have certain disadvantages.

[0005] Dental arch splint: The dental arch splint is ligated to the dentition with stainless steel wire. During the operation, a stainless steel wire loop is used to ligate between the traction hooks of the dental arch splint to complete the intermaxillary fixation, and then the position of the maxillary and mandibular dental bone segments is fixed with the help of a traditional occlusal guide. The disadvantage is that the dental arch splint needs to be fixed with stainless steel ligature wire on each tooth of the entire dentition, which causes great damage to the periodontal tissue, takes a long time during the operation, and the operating doctor is at risk of needle stick injury. It is also not conducive to the patient's maintenance of oral hygiene after the operation, and it is easy to cause adverse consequences such as gingival swelling and necrosis.

[0006] Intermaxillary traction pins: This method is to implant a total of 8-10 titanium self-tapping intermaxillary traction pins in the upper and lower jaws. The implantation site is usually between the lateral incisors and canines and between the first premolars or between the second premolars and first molars in each area. Stainless steel wire loops are used to tie between the upper and lower traction pins to complete intermaxillary fixation, and then the position of the maxillary and mandibular bone segments is fixed with the help of traditional bite guides. Compared with dental arch splints, this method can effectively improve oral hygiene and shorten the operation time, but this method has the possibility of damaging the tooth roots. At the same time, the traction pins may become loose and broken. After surgery, there may also be disadvantages such as pain in the patient due to the traction pins and traction leather rings being wrapped by soft tissue. Utility Model Content

[0007] The utility model provides an orthognathic surgery occlusal guide based on an invisible orthodontic device. The utility model is compatible with the invisible orthodontic device, and there is no need to grind off the invisible orthodontic accessories before the operation, thereby reducing the operation steps and reducing the pain of the patient. The occlusal guide of the utility model can embed the upper and lower teeth into the occlusal guide during the operation, providing a stable inter-maxillary fixation, and there is no need to use devices such as dental arch splints and inter-maxillary traction pins to fix the positions of the maxillary and mandibular tooth bone segments. The occlusal guide of the utility model does not fully cover the anterior tooth area, thereby reducing the resistance and difficulty during dislocation and positioning, saving the operation time, and the observation window is provided to avoid the situation where the teeth are not in place due to interference points in the processing and manufacturing process, thereby ensuring the accuracy of the operation.

[0008] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0009] An orthognathic surgery occlusal guide based on an invisible orthodontic device, characterized in that it comprises an intermediate occlusal guide and a terminal occlusal guide, wherein the intermediate occlusal guide is designed based on an intermediate occlusal relationship formed by a maxillary tooth bone segment and a mandibular tooth bone segment in an initial position, and is used to determine a target position of the maxillary tooth bone segment during orthognathic surgery, and the terminal occlusal guide is designed based on a terminal occlusal relationship formed by determining a maxillary tooth bone segment and a mandibular tooth bone segment, and is used to determine a target position of the mandibular tooth bone segment during orthognathic surgery;

[0010] The intermediate occlusal guide is integrally formed by a first upper contact surface, a first lower contact surface and a connecting portion, wherein the connecting portion is located between the first upper contact surface and the first lower contact surface, a first upper tooth occlusal position is arranged on the first upper contact surface, the first upper tooth occlusal position is for the upper teeth to be embedded in place, three first upper observation windows are arranged on the first upper contact surface, a first lower tooth occlusal position is arranged on the first lower contact surface, the first lower tooth occlusal position is for the lower teeth to be embedded in place, and three first lower observation windows are arranged on the first lower contact surface;

[0011] The terminal occlusal guide plate is integrally formed with a second upper contact surface and a second lower contact surface, a second upper tooth occlusal position is arranged on the second upper contact surface, and the second upper tooth occlusal position is for the maxillary teeth to be inserted into place, a second lower tooth occlusal position is arranged on the second lower contact surface, and the second lower tooth occlusal position is for the mandibular teeth to be inserted into place, and three second observation windows are arranged between the second upper contact surface and the second lower contact surface, so that the positioning of the maxillary and mandibular teeth can be observed at the same time.

[0012] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the three first upper observation windows are respectively located in the anterior tooth area and the bilateral posterior tooth area of ​​the first upper contact surface, and the positioning of the maxillary teeth can be confirmed through the first upper observation windows; the three first lower observation windows are respectively located in the anterior tooth area and the bilateral posterior tooth area of ​​the first lower contact surface, and the positioning of the mandibular teeth can be confirmed through the first lower observation windows.

[0013] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the anterior tooth area of ​​the first upper contact surface wraps around 1 / 2 of the crown of the maxillary incisor, and the anterior tooth area of ​​the first lower contact surface wraps around 1 / 2 of the crown of the mandibular incisor.

[0014] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the edge of the first upper contact surface is 1-2 mm away from the maxillary gum, and the edge of the first lower contact surface is 1-2 mm away from the mandibular gum.

[0015] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the three second upper observation windows are respectively located in the anterior tooth area and the bilateral posterior tooth areas between the second upper contact surface and the second lower contact surface, and the positioning of the maxillary and mandibular teeth can be simultaneously confirmed through the second upper observation windows, the anterior tooth area of ​​the second upper contact surface covers 1 / 2 of the maxillary incisor crown, and the anterior tooth area of ​​the second lower contact surface covers 1 / 2 of the mandibular incisor crown.

[0016] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the edge of the second upper contact surface is 1-2 mm away from the maxillary gum, and the edge of the second lower contact surface is 1-2 mm away from the mandibular gum.

[0017] The orthognathic surgery occlusal guide based on the invisible orthodontic device, wherein: the material of the intermediate occlusal guide and the terminal occlusal guide is nylon material.

[0018] Beneficial effects of the utility model:

[0019] 1. Compatible with invisible orthodontic devices. There is no need to grind off the invisible orthodontic accessories before orthognathic surgery, and the invisible orthodontic accessories can be used for retention. There is no need to remove the accessories bonded to the tooth surface before surgery. The guide plate and the teeth, as well as the fit between the guide plate and the invisible orthodontic accessories are used for positioning. No additional auxiliary methods are required, thus avoiding the possibility of damage to the gums and tooth roots.

[0020] 2. The intermediate and terminal occlusal guides are not fully covered in the anterior area, and the posterior area is designed with dentition coverage, which reduces the resistance and

[0021] It reduces the difficulty and saves operation time.

[0022] 3. The designed observation window can avoid the improper positioning of the teeth due to interference points during the processing and manufacturing process.

[0023] If the jaws are in place, stable intermaxillary fixation can be provided during orthognathic surgery without the need for other auxiliary means, thus ensuring surgical accuracy.

[0024] 4. Use nylon 3D printing material, which has excellent elasticity and toughness and is not easy to produce debris.

[0025] It is convenient for intraoperative operation, and at the same time ensures the strength of inter-maxillary fixation, secure positioning and easy removal and wearing.

[0026] 5. It can provide stable intermaxillary fixation during surgery without the need for auxiliary methods such as traditional fixed orthodontic devices, dental arch splints or intermaxillary traction pins, with almost no risk of skin puncture and the risk of blood-borne viruses or pathogens transmission, thus improving the safety of application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 This is the structural diagram of the middle occlusal guide.

[0028] Figure 2 This is the front structural diagram of the middle occlusal guide.

[0029] Figure 3 This is a side view of the middle occlusal guide.

[0030] Figure 4 This is the structural diagram of the final occlusal guide.

[0031] Figure 5 This is the front structural diagram of the final occlusal guide.

[0032] Figure 6 This is a side view of the final occlusal guide.

[0033] Explanation of the accompanying drawings: 1-middle occlusal guide; 11-first upper contact surface; 12-first lower contact surface; 13-connecting portion; 14-first upper tooth occlusal position; 15-first upper observation window; 16-first lower tooth occlusal position; 17-first lower observation window; 2-terminal occlusal guide; 21-second upper contact surface; 22-second lower contact surface; 23-second upper tooth occlusal position; 24-second lower tooth occlusal position; 25-second upper observation window. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] like Figures 1 to 6 As shown, an orthognathic surgery occlusal guide based on an invisible orthodontic device is characterized in that it includes an intermediate occlusal guide 1 and a terminal occlusal guide 2, wherein the intermediate occlusal guide 1 is designed based on the intermediate occlusal relationship formed by the maxillary dental bone segment and the mandibular dental bone segment in the initial position, and is used to determine the target position of the maxillary dental bone segment during orthognathic surgery, and the terminal occlusal guide 2 is designed based on the terminal occlusal relationship formed by the maxillary dental bone segment and the mandibular dental bone segment, and is used to determine the target position of the mandibular dental bone segment during orthognathic surgery, and the material of the intermediate occlusal guide 1 and the terminal occlusal guide 2 is nylon material.

[0036] Figures 1 to 3 As shown, the intermediate occlusal guide plate 1 is integrally formed by a first upper contact surface 11 , a first lower contact surface 12 and a connecting portion 13 , wherein the connecting portion 13 is located between the first upper contact surface 11 and the first lower contact surface 12 .

[0037] A first upper tooth occlusal position 14 is arranged on the first upper contact surface 11, and the first upper tooth occlusal position 14 is for the maxillary teeth to be inserted into position. Three first upper observation windows 15 are arranged on the first upper contact surface 11, and the three first upper observation windows 15 are respectively located in the anterior tooth area and bilateral posterior tooth areas of the first upper contact surface 11. The positioning of the maxillary teeth can be confirmed through the first upper observation windows 15. The anterior tooth area of ​​the first upper contact surface 11 wraps 1 / 2 of the crown of the maxillary incisor, and the edge of the first upper contact surface 11 is 1-2 mm away from the maxillary gums.

[0038] A first lower tooth occlusal position 16 is arranged on the first lower contact surface 12, and the first lower tooth occlusal position 16 is for the mandibular teeth to be inserted into position. Three first lower observation windows 17 are arranged on the first lower contact surface 12, and the three first upper observation windows 15 are respectively located in the anterior tooth area and the bilateral posterior tooth areas of the first upper contact surface 11, and the positioning of the maxillary teeth can be confirmed through the first upper observation window 15. The three first lower observation windows 17 are respectively located in the anterior tooth area and the bilateral posterior tooth areas of the first lower contact surface 12, and the positioning of the mandibular teeth can be confirmed through the first lower observation window 17. The anterior tooth area of ​​the first lower contact surface 12 wraps 1 / 2 of the crown of the mandibular incisor, and the edge of the first lower contact surface 12 is 1-2 mm away from the mandibular gums.

[0039] Figures 4 to 6 As shown, the terminal occlusal guide plate 2 has a second upper contact surface 21 and a second lower contact surface 22 formed as a whole, the second upper contact surface 21 is provided with a second upper tooth occlusal position 23, the second upper tooth occlusal position 23 is for the upper teeth to be embedded in place, the second lower contact surface 22 is provided with a second lower tooth occlusal position 24, the second lower tooth occlusal position 24 is for the lower teeth to be embedded in place, and three second observation windows 25 are provided between the second upper contact surface 21 and the second lower contact surface 22, the three second upper observation windows 25 The anterior tooth area and bilateral posterior tooth areas respectively located between the second upper contact surface 21 and the second lower contact surface 22 can simultaneously confirm the positioning of the maxillary and mandibular teeth through the second upper observation window 25. The anterior tooth area of ​​the second upper contact surface 21 covers 1 / 2 of the crown of the maxillary incisor, and the edge of the second upper contact surface 21 is 1-2mm away from the maxillary gum. The anterior tooth area of ​​the second lower contact surface 22 covers 1 / 2 of the crown of the mandibular incisor, and the edge of the second lower contact surface 22 is 1-2mm away from the mandibular gum.

[0040] A method for designing and manufacturing an orthognathic surgery occlusal guide based on an invisible orthodontic device, characterized in that it comprises the following steps:

[0041] Step 1: The patient undergoes maxillofacial spiral CT scan and a hard plaster tooth model is made before surgery;

[0042] Step 2: Scan the anhydrite tooth model using a 3D laser scanning device, save the acquired virtual dentition data in STL format, and replace the dentition data in the CT data to obtain higher dentition data accuracy;

[0043] Step 3: The patient's CT data is imported into the craniomaxillofacial surgery planning software in DICOM format to create a virtual three-dimensional craniomaxillary model;

[0044] Step 4: simulate the Le Fort I osteotomy of the maxilla and the sagittal splitting of the mandibular ramus on the established virtual three-dimensional craniomaxillary model, move the maxillary dental bone segment to the target position according to the surgical plan, and then determine the target position of the mandibular dental bone segment based on the terminal occlusal relationship;

[0045] Step 5, import the dentition data into the three-dimensional design software in STL format, and design the intermediate occlusal guide plate 1 through the three-dimensional design software based on the intermediate occlusal relationship between the maxillary tooth bone segment at the target position and the mandibular tooth bone segment at the initial position. The intermediate occlusal guide plate 1 covers 1 / 2 of the crowns of the upper and lower incisors, and covers the crowns of the upper and lower canines, bicuspids, and the first and or second molars, wherein the edge of the guide plate is about 1-2 mm away from the gingival margin, and observation windows are set in the anterior tooth area and the bilateral posterior tooth area. Based on the terminal occlusal relationship between the maxillary tooth bone segment and the mandibular tooth bone segment at the target position, design the terminal occlusal guide plate 2 through the three-dimensional design software, and the terminal occlusal guide plate 2 is designed based on the terminal occlusal relationship determined by the maxillary tooth bone segment and the mandibular tooth bone segment at the target position, and the settings of the guide plate edge and the observation window are the same as those of the intermediate occlusal guide plate 1. The intermediate occlusal guide plate 1 and the terminal occlusal guide plate 2 are manufactured using the three-dimensional printing technology according to the data designed by the three-dimensional design software.

[0046] In the embodiment, after the patient undergoes Lefort I type osteotomy on the maxilla, the upper and lower dentitions are respectively positioned in the middle occlusal plate 1, and the tooth positioning is observed through the first upper observation window 15 and the first lower observation window 17. The middle occlusal plate 1 can provide firm intermaxillary fixation while the upper and lower dentitions are embedded in place. The patient's maxillary dental bone segment is moved to the target position designed in the surgical plan, and the micro-titanium plates are respectively fixed to the edges of the bilateral piriform foramina and the zygomatic alveolar ridge. After the fixation of the maxillary dental bone segment is completed, the middle occlusal plate 1 is removed, and the patient undergoes bilateral sagittal splitting of the mandibular ramus. The upper and lower dentitions are embedded in the terminal occlusal plate 2, and the target position of the mandibular dental bone segment is determined with reference to the fixed maxilla, and the tooth positioning is observed through the second upper observation window 25, and small titanium plates or titanium nails are fixed to the bilateral external oblique lines.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An orthognathic surgery occlusal guide based on an invisible orthodontic device, characterized in that: The invention comprises an intermediate occlusal guide plate (1) and a terminal occlusal guide plate (2), wherein the intermediate occlusal guide plate (1) is designed based on the intermediate occlusal relationship formed by the maxillary tooth bone segment and the mandibular tooth bone segment in the initial position, and is used to determine the target position of the maxillary tooth bone segment during orthognathic surgery; the terminal occlusal guide plate (2) is designed based on the terminal occlusal relationship formed by the maxillary tooth bone segment and the mandibular tooth bone segment, and is used to determine the target position of the mandibular tooth bone segment during orthognathic surgery; The intermediate occlusal guide plate (1) is integrally formed by a first upper contact surface (11), a first lower contact surface (12) and a connecting portion (13), wherein the connecting portion (13) is located between the first upper contact surface (11) and the first lower contact surface (12); a first upper tooth occlusal position (14) is provided on the first upper contact surface (11), and the first upper tooth occlusal position (14) is provided for the upper teeth to be embedded in place; three first upper observation windows (15) are provided on the first upper contact surface (11); a first lower tooth occlusal position (16) is provided on the first lower contact surface (12), and the first lower tooth occlusal position (16) is provided for the lower teeth to be embedded in place; and three first lower observation windows (17) are provided on the first lower contact surface (12); The terminal occlusal guide plate (2) comprises a second upper contact surface (21) and a second lower contact surface (22) which are formed integrally with each other; a second upper tooth occlusal position (23) is arranged on the second upper contact surface (21), and the second upper tooth occlusal position (23) is used for the maxillary teeth to be inserted into position; a second lower tooth occlusal position (24) is arranged on the second lower contact surface (22), and the second lower tooth occlusal position (24) is used for the mandibular teeth to be inserted into position; three second upper observation windows (25) are arranged between the second upper contact surface (21) and the second lower contact surface (22), so that the position of the maxillary and mandibular teeth can be observed simultaneously.

2. An orthognathic surgery occlusal guide based on an invisible orthodontic device as claimed in claim 1, characterized in that: The three first upper observation windows (15) are respectively located in the anterior tooth area and the bilateral posterior tooth area of ​​the first upper contact surface (11), and the position of the maxillary teeth can be confirmed through the first upper observation windows (15). The three first lower observation windows (17) are respectively located in the anterior tooth area and the bilateral posterior tooth area of ​​the first lower contact surface (12), and the position of the mandibular teeth can be confirmed through the first lower observation windows (17).

3. An orthognathic surgery occlusal guide based on an invisible orthodontic device as claimed in claim 1, characterized in that: The anterior tooth region of the first upper contact surface (11) wraps around 1 / 2 of the crown of the maxillary incisor, and the anterior tooth region of the first lower contact surface (12) wraps around 1 / 2 of the crown of the mandibular incisor.

4. The occlusal guide for orthognathic surgery based on an invisible orthodontic device according to claim 1, characterized in that: The edge of the first upper contact surface (11) is 1-2 mm away from the maxillary gum, and the edge of the first lower contact surface (12) is 1-2 mm away from the mandibular gum.

5. The occlusal guide for orthognathic surgery based on an invisible orthodontic device according to claim 1, characterized in that: The three second upper observation windows (25) are respectively located in the anterior tooth area and bilateral posterior tooth areas between the second upper contact surface (21) and the second lower contact surface (22). The second upper observation windows (25) can simultaneously confirm the position of the maxillary and mandibular teeth. The anterior tooth area of ​​the second upper contact surface (21) covers 1 / 2 of the crown of the maxillary incisor, and the anterior tooth area of ​​the second lower contact surface (22) covers 1 / 2 of the crown of the mandibular incisor.

6. The occlusal guide for orthognathic surgery based on an invisible orthodontic device according to claim 1, characterized in that: The edge of the second upper contact surface (21) is 1-2 mm away from the maxillary gum, and the edge of the second lower contact surface (22) is 1-2 mm away from the mandibular gum.

7. An orthognathic surgery occlusal guide based on an invisible orthodontic device as claimed in claim 1, characterized in that: The intermediate occlusal guide plate (1) and the terminal occlusal guide plate (2) are made of nylon material.

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