Adjustable maxillary expansion MSE device with front traction function and manufacturing method of adjustable maxillary expansion MSE device

Abstract

The invention discloses an adjustable maxillary bone expansion MSE device with a front traction function and a manufacturing method. The device comprises a spiral expansion main body support, palatal bars with molar band rings are connected to the two sides of the spiral expansion main body support respectively; the first connecting components are arranged on the front and rear end surfaces of the spiral expansion main body bracket; the second connecting assembly is connected with the first connecting assembly, can be stopped after generating a relative displacement difference in the vertical direction with the first connecting assembly, and comprises an anchorage nail fixing piece for accommodating an anchorage nail; a buccal tube is arranged on the outer cheek side of the molar band at the position of the first molar, and a front traction hook is detachably connected into the buccal tube. The spiral arch expander is particularly suitable for patients with narrow dental arches and high palate cover arches, the anchorage nails can be closer to the stress center of the maxilla by adjusting the height positions of the anchorage nails, and the type of the spiral arch expander is not limited by the small size any more; due to the design of four anchorage teeth, four long anchorage nails can be removed at an early stage after the middle palate seam is opened by the expansion device, so that the comfort of a patient is improved; a detachable front traction flexible device can avoid the difficulty that the steel wire cannot be detached and rewelded after being broken; the first premolar is provided with a buccal bracket, so that vertical control operations such as upper anterior tooth depression and the like can be performed by using the whole device in the early stage; the device has the functions of front traction, early alignment, upper anterior tooth leveling and the like.

Description

Technical Field

[0001] The present invention belongs to the technical field of oral medical devices, and in particular relates to an adjustable maxillary bone expansion MSE device with a front traction function and a manufacturing method thereof. Background Art

[0002] Maxillary expansion assisted by implant support is a non-surgical method used in recent years to correct transverse maxillary underdevelopment in adults. Its characteristics are that implant screws are implanted in the palate as bony support, and spiral expansion generates orthopedic force to separate the mid-palatal suture, thereby achieving the purpose of expansion. As a special type of implant support assisted maxillary expansion device, the maxillary skeletal expander (MSE) has been widely used in clinical practice. MSE implants 4 micro-implants into the posterior part of the palate, penetrates the double-layer bone cortex, and applies orthopedic force to the micro-implants through spiral expansion. The maxilla is used as support. When the orthopedic force is greater than the resistance, the mid-palatal suture will open, thereby achieving maxillary bony expansion. MSE can effectively correct late adolescent and adult patients with transverse maxillary underdevelopment. Among patients who need to use MSE, some skeletal Class III patients require anterior traction. During maxillary expansion, the maxilla needs to be pulled forward to relieve anterior crossbite. The existing technology has the following deficiencies: 1. Due to the unfavorable factors such as excessively narrow dental arches, high arched palatal vaults, and excessively thick palatal mucosa of a large number of patients, the expander cannot be close to the palatal mucosa, that is, it cannot be close to the stress center of the maxillary bone, resulting in the inability to place the expander and difficulty in implanting micro-implants; 2. Even if the MSE is implanted for arch expansion, only small spiral expanders can be placed, and the simple use of small expanders cannot achieve the required amount of arch expansion, and the expander needs to be removed and remade, and the arch expansion again makes the treatment cumbersome; 3. The existing MSE treatment needs to be completely removed after the arch expansion and maintenance is completed, which often takes 3-6 months, and the implantation of 4 implants greatly reduces the patient's comfort level; 4. The anchor teeth are located on the maxillary first molars, resulting in the maxillary first molars tilting due to excessive force during the MSE arch expansion; 5. For patients who need anterior traction, if the wire breaks in the middle, it cannot be removed and re-welded, so the anterior traction operation is forced to stop; 6. The buccal bracket is not designed, and the overall device cannot be used for vertical control operations such as anterior tooth depression. Summary of the invention

[0003] In view of this, the purpose of the present invention is to provide an adjustable maxillary skeletal expansion MSE device with anterior traction function and a manufacturing method to solve the deficiencies in the prior art.

[0004] In order to achieve the above object, the present invention is achieved through the following technical solutions:

[0005] Provided is an adjustable maxillary bone expansion MSE device with anterior traction function, comprising:

[0006] The spiral expansion arch main frame has palatal bars connected to both sides, and the ends of the palatal bars are connected to premolars and molar band rings;

[0007] A first connecting component is provided at the front and rear end surfaces of the spiral expansion arch main support;

[0008] A second connecting component, connected to the first connecting component and capable of generating a relative displacement difference in a vertical direction with the first connecting component and then stopping, comprises an anchor nail fixing member;

[0009] Anchor nails, fixedly connected to the anchor nail fixing piece;

[0010] The outer buccal side of the molar band ring at the position of the first molar is provided with a buccal tube, and a front traction hook is detachably connected inside the buccal tube.

[0011] For example, in the adjustable maxillary expansion MSE device with anterior traction function, two of the first connecting components are respectively disposed on the front and rear end surfaces of the spiral expansion main support.

[0012] As described in the adjustable maxillary bone expansion MSE device with anterior traction function, wherein the first connecting component includes a locking hole, the second connecting component includes a locking block, the anchor nail fixing member is fixed on the locking block, and the locking block can move along the locking hole and be clamped in the locking hole.

[0013] As described in the adjustable maxillary expansion MSE device with anterior traction function, the transverse cross-section of the locking block is in a "T" shape, and the outer periphery of the vertical rod portion of the "T" shape and the connection between the vertical rod portion and the horizontal rod portion are both arc-shaped.

[0014] As described in the adjustable maxillary bone expansion MSE device with anterior traction function, wherein the anchorage nail fixing member is a clasp.

[0015] For example, the adjustable maxillary skeletal expansion MSE device with anterior traction function, wherein a group of palatal rods are respectively provided on both sides of the spiral expansion main frame, and the molar band rings are respectively located at the first premolar and the first molar.

[0016] For example, in the adjustable maxillary skeletal expansion MSE device with anterior traction function, a buccal bracket is provided on the outer buccal side of the molar band ring where the first premolar is located.

[0017] On the other hand, a method for manufacturing a maxillary bone expansion MSE device is provided, wherein the method for manufacturing the adjustable maxillary bone expansion MSE device with anterior traction function as described above comprises the following steps:

[0018] S1. Obtain the morphological information of the soft and hard tissues in the patient's mouth by taking a mold, or obtain the three-dimensional digital information of the soft and hard tissues in the patient's mouth by oral scanning;

[0019] S2, patients undergo CBCT;

[0020] S3, register and fit the mouth scan / warehouse scan data with the CBCT modeling data through the design software;

[0021] S4. The anchorage pins are designed and positioned based on the registered data. The anchorage pins are symmetrically distributed on both sides of the mid-palatal suture and penetrate two layers of cortical bone. The required molar band ring and the buccal bracket on the molar band ring and the buccal tube for front traction are designed according to the undercut of the dentition and the orientation of the MSE. A retention mesh structure is designed inside the molar band ring, and the overall structure is processed in one piece through 3D metal printing technology.

[0022] S5. The printed bilateral band structure is polished into place on the plaster or resin model and welded to the finished MSE expander structure to form a complete MSE appliance.

[0023] The beneficial effects of the technical solution of the present invention are:

[0024] It is particularly suitable for patients with narrow dental arches and high palate arches. By adjusting the height of the anchorage pins, the anchorage pins can be brought closer to the stress center of the maxillary bone, and the model of the spiral expander is no longer limited to a small size. The design of 4 anchorage teeth allows the 4 long anchorage pins to be removed early (within 1 month) after the mid-palatal suture is opened by the expander device, thereby greatly improving the patient's comfort. A detachable "front traction" flexible device is designed to avoid the difficulty of being unable to remove and re-weld the wire after it breaks. A buccal bracket is designed for the first premolar, which has the function of using the overall device to perform vertical control operations such as lowering the upper anterior teeth in the early stage. The present invention has the functions of front traction, early alignment, and leveling of the upper anterior teeth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To further illustrate the above-mentioned objectives, structural features and effects of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Figure 1 , Figure 2 They are schematic diagrams of the overall structure of the preferred embodiment of the present invention at two different angles;

[0027] Figure 3 This is a schematic diagram of the structure of the spiral expansion arch main body support according to a preferred embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of the second connecting component in a preferred embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of the structure of the anchor nail in a preferred embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the front traction hook structure of a preferred embodiment of the present invention;

[0031] In the figure: 1. spiral expansion arch main frame; 2. first connecting component; 3. second connecting component; 4. anchorage pin; 5. palatal rod; 6. molar band ring; 7. locking hole; 8. locking block; 9. clasp; 10. buccal bracket; 11. buccal tube; 12. front traction hook. DETAILED DESCRIPTION

[0032] The terms "invention", "present invention" and "the present invention" used in this specification are intended to refer broadly to all subject matter of this specification and any patent claims below. Statements containing these terms should not be understood to limit the subject matter described herein or to limit the meaning or scope of any patent claim below. In addition, this specification does not attempt to describe or limit the subject matter covered by any claim of any specific component, paragraph, statement or figure of this application. The subject matter should be understood with reference to the entire specification, all drawings and any claims below. The present invention may have other embodiments and be practiced or implemented in other ways. Moreover, it should be understood that the words and terms used herein are for illustrative purposes and should not be considered as limiting.

[0033] The details of the present invention will now be discussed with reference to the accompanying drawings which illustrate the present invention by way of example only. In the accompanying drawings, similar features or components may be marked with the same reference numerals.

[0034] The use of "including," "having," and "comprising" and variations thereof herein is meant to encompass the items listed thereafter and their equivalents and additional items. Although reference may be made to directions such as above, below, upward, downward, rearward, bottom, top, front, rear, etc., in describing the drawings, for convenience, reference is made relative to the drawings. These directions are not intended to literally accept or limit the present invention in any form. In addition, terms such as "first," "second," "third," etc., are used herein for illustrative purposes and are not intended to indicate or imply importance or significance.

[0035] See also Figures 1 to 6 As shown, in a preferred embodiment, the adjustable maxillary expansion MSE device with anterior traction function of the present invention includes a spiral expansion main frame 1, a first connecting component 2, a second connecting component 3 and an anchor pin 4, the two sides of the spiral expansion main frame 1 are respectively connected with a palatal rod 5, the end of the palatal rod 5 is connected with a molar band ring 6, the first connecting component 2 is arranged on the front and rear end surfaces of the spiral expansion main frame 1, the second connecting component 3 is connected to the first connecting component 2 and can produce a relative displacement difference in the vertical direction with the first connecting component 2 and then stop to adjust the height of the anchor pin, the second connecting component 3 includes an anchor pin fixing piece, and the anchor pin 4 is fixedly connected to the anchor pin fixing piece.

[0036] Furthermore, two first connecting components 2 are respectively provided on the front and rear end surfaces of the spiral expansion arch main support 1, that is, four anchoring nails 4 are provided.

[0037] The first connecting assembly 2 includes a locking hole 7, and the second connecting assembly 3 includes a locking block 8. The support nail fixing piece is fixed on the locking block 8, and the locking block 8 can move along the locking hole 7 and be clamped in the locking hole 7. Specifically, the transverse cross-section of the locking block 8 is a "T" shape, and the outer periphery of the vertical rod part of the "T" shape and the connection between the vertical rod part and the cross rod part are all arc-shaped. It can be understood that the above-mentioned structure of the locking hole 7 and the locking block 8 makes it difficult for the locking block 8 to slip outward when moving along the locking hole 7.

[0038] The supporting nail fixing part is a clamping ring 9, and the supporting nail 4 is fixed in the clamping ring 9. The outer end face of the locking hole 7 has an open groove to facilitate the passage of the connecting part of the clamping ring 9 and the locking block 8. At the same time, the setting of the open groove also facilitates the adjustment of the tightness of the locking hole 7 and the locking block 8. The locking hole 7 and the locking block 8 are preferably made of metal.

[0039] Continue to view Figure 1 , Figure 2 As shown, a group of palatal rods 5 are respectively provided on both sides of the spiral expansion arch main frame 1, and the molar band rings 6 are respectively located at the first premolar and the first molar.

[0040] Furthermore, the outer buccal side of the molar band ring 6 at the position of the first premolar is provided with a buccal bracket 10, and the outer buccal side of the molar band ring 6 at the position of the first molar is provided with a buccal tube 11, and a detachable front traction hook 12 made of 1.0-1.2 mm stainless steel wire can be inserted into the buccal tube 11. Since the adult arch expansion needs to be maintained for at least 3 months after completion, the device can simultaneously place the buccal bracket 10 on the maxilla 4 and / or the maxilla 6, which is conducive to the early alignment and leveling of the upper teeth and shortens the treatment time.

[0041] The method for making the MSE device comprises the following steps:

[0042] S1. Obtain the morphological information of the soft and hard tissues in the patient's mouth by taking a mold, or obtain the three-dimensional digital information of the soft and hard tissues in the patient's mouth by oral scanning;

[0043] S2, patients undergo CBCT;

[0044] S3, register and fit the mouth scan / warehouse scan data with the CBCT modeling data through the design software;

[0045] S4. Based on the registered data, the anchorage pin position (including implantation site, angle, and depth) is designed and determined. The anchorage pins are symmetrically distributed on both sides of the mid-palatal suture, and two layers of cortical bone are pierced. The required molar band ring and the buccal bracket on the molar band ring and the buccal tube device for front pull are designed according to the undercut of the dentition and the MSE positioning direction. A retention mesh structure is designed inside the molar band ring, and the overall structure is processed in one piece through 3D metal printing technology.

[0046] S5. The printed bilateral band structure is polished into place on the plaster or resin model and combined and welded with the finished new MSE expander structure to form a complete new improved MSE appliance.

[0047] Compared with the existing MSE device, the position of the main support 1 of the spiral expansion arch can be appropriately moved forward, which is beneficial to the uniform distribution of the mechanical forces during the expansion arch.

[0048] A new type of bony arch expansion MSE device was made by using 3D printing and maxillary models, which is beneficial for adjusting the appropriate height when the four anchorage pins are implanted. The design of the four anchorage teeth is conducive to mechanical distribution, and a buccal bracket is provided at the same time, which can also have a detachable anterior traction function; once the mid-palatal suture is opened by arch expansion, the four anchorage pins can be removed; in addition, the gap created by the arch expansion can be used to timely align and level the upper anterior teeth.

[0049] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. An adjustable maxillary expansion MSE device with anterior traction function, characterized in that: include: The spiral expansion arch main frame has palatal rods connected to both sides respectively, and the ends of the palatal rods are connected to molar band rings; A first connecting component is provided at the front and rear end surfaces of the spiral expansion arch main support; A second connecting component, connected to the first connecting component and capable of generating a relative displacement difference in a vertical direction with the first connecting component and then stopping, comprises an anchor nail fixing member; Anchor nails, fixedly connected to the anchor nail fixing piece; The outer buccal side of the molar band ring at the position of the first molar is provided with a buccal tube, and a front traction hook is detachably connected inside the buccal tube.

2. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 1, characterized in that: The front and rear end surfaces of the spiral expansion arch main support are respectively provided with two of the first connecting components.

3. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 1 or 2, characterized in that: The first connecting component includes a locking hole, and the second connecting component includes a locking block. The anchor nail fixing piece is fixed on the locking block, and the locking block can move along the locking hole and be clamped in the locking hole.

4. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 3, characterized in that: The transverse cross section of the locking block is in a "T" shape, and the outer periphery of the vertical rod portion of the "T" shape and the connection between the vertical rod portion and the horizontal rod portion are both arc-shaped.

5. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 1 or 2, characterized in that: The anchor nail fixing piece is a clamping ring.

6. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 1 or 2, characterized in that: A group of palatal rods are respectively arranged on both sides of the spiral expansion arch main frame, and the molar band rings are respectively located at the first premolar and the first molar positions.

7. The adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 6, characterized in that: The outer buccal side of the molar band ring where the first premolar is located is provided with a buccal bracket.

8. A method for manufacturing a maxillary bone expansion MSE device, characterized in that: The method for manufacturing the adjustable maxillary bone expansion MSE device with anterior traction function as claimed in claim 7 comprises the following steps: S1. Obtain the morphological information of the soft and hard tissues in the patient's mouth by taking a mold, or obtain the three-dimensional digital information of the soft and hard tissues in the patient's mouth by oral scanning; S2, patients undergo CBCT; S3, register and fit the mouth scan / warehouse scan data with the CBCT modeling data through the design software; S4. The anchorage pins are designed and positioned based on the registered data. The anchorage pins are symmetrically distributed on both sides of the mid-palatal suture and penetrate two layers of cortical bone. The required molar band ring and the buccal bracket on the molar band ring and the buccal tube for front traction are designed according to the undercut of the dentition and the orientation of the MSE. A retention mesh structure is designed inside the molar band ring, and the overall structure is processed in one piece through 3D metal printing technology. S5. The printed bilateral band structure is polished into place on the plaster or resin model and welded to the finished MSE expander structure to form a complete MSE appliance.

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