Jalatal orthodontic micro-implant nail and use method thereof

Abstract

The invention provides a palate orthodontic micro-implant nail and a use method thereof. The palate orthodontic micro-implant nail comprises a mounting head, a connecting section, a screw section and a self-locking assembly, wherein the mounting head, the connecting section and the screw section are coaxially connected in sequence; the self-locking assembly is arranged on the mounting head; a plurality of sliding openings are formed in the mounting head, and the sliding openings are formed in the circumferential direction of the mounting head at intervals; the self-locking assembly comprises a plurality of locking pieces, each locking piece comprises a sliding part and a bent part formed by bending one end of the sliding part towards the screw rod section, the sliding parts are slidably inserted into the sliding openings respectively, and the sliding parts can be stressed to slide along the sliding openings. And therefore, the bending part is close to or far away from the mounting head. According to the invention, the probability that the rubber band slides out of the palate orthodontic micro-implant nail can be reduced.

Description

Technical Field

[0001] The invention relates to the technical field of dental appliances, and in particular to a palate orthodontic micro-implant screw and a use method thereof. Background Art

[0002] Misaligned teeth and poor shapes will not only affect oral health, but also facial beauty. In severe cases, they will also affect people's mental health, making them taciturn, inferior, and affecting daily social activities. In order to change this situation, many people will choose to change themselves through orthodontics. Existing orthodontics mostly use braces for correction, but for correcting protruding teeth, gummy smile, deep bite, over-eruption of molars, depressed molars, upright molars, mesial and distal movement of molars, and correction of occlusal plane inclination, simply wearing braces cannot play a corrective role. In the above situations, orthodontic implants are usually used to assist in correction. Orthodontic implants are micro-screw implants, and their function is to provide a fixed source of force to help pull the teeth. During use, the implantation surgery is simple, less traumatic, and easy to be accepted by users.

[0003] The Chinese invention patent with announcement number CN104622591B discloses a micro anchorage nail, which is widely used in dentistry. However, during use, there are the following problems: when the rubber band is hooked on the traction suspension ligature part, the flange on the top of the traction suspension ligature part restricts the rubber band from being pulled out by the traction force, but the rubber band is easy to slip out of the flange. Some dentists use a resin ball that is heated and glued to the outside of the flange to increase the cross-section of the flange to prevent the rubber band from slipping out, but the resin ball and the flange are not made of the same material and are not firmly glued, resulting in the rubber band still being easy to slip out.

[0004] The Chinese utility model patent with the announcement number CN210673463U discloses an orthodontic micro implant nail, the head of which is provided with a self-locking device for locking accessories, the self-locking device includes a first groove running through the head and a sliding cover plate movably connected to the head, and the sliding cover plate can be moved to the upper part of the first groove to form a closed space. Although the first groove and the sliding cover plate set on the mounting head can prevent accessories such as rubber bands from falling out of the first groove, the self-locking device has the following disadvantages when used: first, the dental orthodontic correction time is usually long, lasting about several months to several years, and the rubber band needs to be replaced in the hospital every month after installation to avoid bacterial growth and infection; and the self-locking device needs to slide the sliding cover plate every time it is replaced. Since the overall size of the implant nail is usually small and the thickness of the sliding cover plate is also thin, it is easy to cause the sliding cover plate to deform or loosen after pulling the sliding cover plate many times, resulting in self-locking failure. Second, when it is necessary to hook multiple rubber bands for pulling in different directions on the implant nail, the depth of the first groove needs to be increased to accommodate the multiple rubber bands. In addition, the thickness of the sliding cover plate will cause the thickness of the implant nail head to be relatively large. When the implant nail is implanted in the jaw, the head of the implant nail will contact the tongue, causing an obvious foreign body sensation, which is not comfortable to wear. Third, when the implant nail is used, if the doctor fails to cover the sliding cover plate in time when placing the rubber band in the first groove, the rubber band in the first groove is easy to fall out; and when multiple rubber bands need to be installed, there is a situation where the rubber band is exposed outside the first installation groove, causing the sliding cover plate to not slide smoothly, which makes installation difficult.

[0005] In addition, the orthodontic implant nails in the prior art still have the following problems:

[0006] First, the tooth bone usually includes cortical bone on the outer surface and cancellous bone on the inner side of the cortical bone, wherein the cortical bone is relatively hard. The thread density of the screw section of the existing orthodontic implant screw is consistent, which makes it difficult to screw into the cortical bone, and the cortical bone is relatively thin, resulting in an insufficiently stable combination between the implant screw and the cortical bone.

[0007] Second, there are usually two types of materials for existing orthodontic implants, one is stainless steel and the other is titanium alloy. Stainless steel has greater hardness but poor biocompatibility, so the implants need to be made longer to ensure their stable integration with the tooth bone. However, orthodontic implants that are too long will cause greater damage to the tooth bone. Titanium alloy has better biocompatibility but poor hardness and is easy to break after installation. The time for tooth correction is generally two years. After an orthodontic implant breaks, it needs to be reinstalled. Such repeated operations are very time-consuming for doctors and patients. Summary of the invention

[0008] The present invention aims to solve at least one of the above-mentioned technical problems and provide a palatal orthodontic micro-implant and a method of using the same to prevent the rubber band from falling off the orthodontic implant.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A palatal orthodontic micro-implant screw comprises a mounting head, a connecting section and a screw section which are coaxially connected in sequence, wherein a plurality of sliding openings are provided on the mounting head, and the plurality of sliding openings are arranged at intervals along the circumference of the mounting head; the palatal orthodontic micro-implant screw also comprises a self-locking component arranged on the mounting head, and the self-locking component comprises a plurality of locking plates, each locking plate comprises a sliding portion and a bending portion formed by bending one end of the sliding portion toward the screw section, and the plurality of sliding portions are respectively slidably inserted into the plurality of sliding openings, and the sliding portion can slide along the sliding openings under force, so that the bending portion approaches or moves away from the mounting head.

[0011] Furthermore, a locking groove is recessed on the end surface of the mounting head facing away from the connecting section, and a plurality of sliding openings are spaced around the periphery of the locking groove and one end of each of the sliding openings is connected to the locking groove, and an end of the sliding portion away from the bending portion is located in the locking groove; the self-locking assembly also includes an unlocking member, which can be inserted into the locking groove and abut against an end of a plurality of the sliding portions located in the locking groove, thereby pushing the bending portion to slide in a direction away from the locking groove.

[0012] Furthermore, an inclined first mating surface is provided at one end of the sliding portion located in the locking groove, and an inclined second mating surface is provided at one end of the unlocking piece. During the process of inserting the unlocking piece into the locking groove, the second mating surface slidably cooperates with the first mating surface to push the sliding portion to slide until the bending portion is in a working position away from the mounting head.

[0013] Furthermore, the self-locking component includes a flexible locking piece. When the bending portion is in the working position and the unlocking piece and the locking groove are in a separated state, the flexible locking piece can be detachably inserted into the locking groove and abut against one end of the sliding portion located in the locking groove to prevent the bending portion from retracting under force.

[0014] Furthermore, the flexible locking member is made of resin material, including a connecting rod, an end cap fixed to one end of the connecting rod, and a limiting flange protruding from the peripheral wall of the connecting rod at one end away from the end cap. The connecting rod is arranged between the plurality of sliding parts and abuts against one end of the plurality of sliding parts located in the locking groove. The end cap abuts against the end surface of the mounting head facing away from the connecting section. The limiting flange is received in the locking groove and abuts against the side of the plurality of sliding parts facing the connecting section.

[0015] Furthermore, the bent portion is located outside the mounting head, and when the unlocking member and the locking groove are in a separated state, the locking plate is subjected to force to move the bent portion toward the locking groove until the bent portion fits against the outer wall of the mounting head.

[0016] Furthermore, the outer surface of the screw segment is provided with a first threaded zone and a second threaded zone, the first threaded zone is located between the second threaded zone and the connecting section, the length of the first threaded zone is smaller than the length of the second threaded zone, and the pitch of the first threaded zone is smaller than the pitch of the second threaded zone.

[0017] Furthermore, the screw segment, the mounting head and the connecting segment are all made of stainless steel and have titanium nitride coatings on their surfaces.

[0018] The present invention also provides a method for using a palatal orthodontic micro-implant, comprising the following steps:

[0019] Step S1: providing the palate orthodontic micro-implant;

[0020] Step S2: disinfect the location where implantation is required, and use the back of a knife to make a mark on the preset implantation location in the oral cavity to determine the mesial and distal position of the implantation pin;

[0021] Step S3: installing a screwdriver on the mounting head of the palatal orthodontic micro-implant, aligning the bottom end of the screw segment of the palatal orthodontic micro-implant with the position of the mark, and screwing the screw segment of the palatal orthodontic micro-implant into the tooth bone using the screwdriver;

[0022] Step S4: inserting the unlocking member into the locking groove, so that the locking piece slides along the sliding opening until the bent portion slides to a working position away from the mounting head, so that the bent portion and the sliding portion form a hook, and the unlocking member is pulled out;

[0023] Step S5: During orthodontic correction, the rubber band used for orthodontic correction is hooked on the hook formed by the bending part and the sliding part.

[0024] Furthermore, the self-locking component also includes a flexible locking piece. In step S, when the bending portion is in the working position and the unlocking piece and the locking groove are in a separated state, the flexible locking piece is detachably inserted into the locking groove and abuts against one end of the sliding portion located in the locking groove to prevent the bending portion from retracting under force.

[0025] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0026] 1. When the above-mentioned palatal orthodontic micro-implant is used, the locking piece can be pushed out by the unlocking piece, so that the sliding part and the bending part form a hook for hooking the rubber band to prevent the rubber band from falling off the orthodontic implant. The setting of the locking piece of the above-mentioned palatal orthodontic micro-implant enables it to form a hook located on the side of the installation head, and the rubber band is hooked by using the space on the side of the installation head, so that it can be set on a smaller implant nail with multiple locking pieces, so that multiple rubber bands pulling in different directions can be hooked on one implant nail, and the hook is set on the side of the installation head, which can reduce the thickness of the installation head. When the implant is implanted in the jaw, it can reduce the foreign body sensation and improve the wearing comfort; at the same time, when installing the rubber band, the rubber band can be directly hooked on the hook. The restriction of the hook makes it difficult for the rubber band to fall off, the operation difficulty is low, and it is more convenient to use. In addition, when the above-mentioned palatal orthodontic micro-implant is used, during the entire orthodontic correction period, it is only necessary to slide the locking plate during the first installation to avoid deformation or loosening of the locking plate due to multiple pulling and pulling of the locking plate, which is beneficial to improving the stability of self-locking.

[0027] 2. The above-mentioned palatal orthodontic micro-implant has a screw section including a first threaded zone with a smaller pitch and a second threaded zone with a larger pitch. The second threaded zone has the same pitch as the thread of the palatal orthodontic micro-implant in the prior art, and the first threaded zone has a smaller pitch, so that its combination with the bone cortex is more stable.

[0028] 3. The material of the above-mentioned palatal orthodontic micro-implant is stainless steel, which can make the overall hardness of the palatal orthodontic micro-implant meet the requirements of installation surgery and wearing. The setting of the titanium nitride coating can increase the biocompatibility of the palatal orthodontic micro-implant. Through the combination of stainless steel and titanium nitride coating, the palatal orthodontic micro-implant can meet the hardness and biocompatibility requirements of the implant, thereby enabling it to be stably combined with the tooth bone while reducing the overall length of the implant, thereby reducing damage to the tooth bone. Moreover, due to its high hardness, it is not easy to break and has a long service life, which can reduce the number of installations during the correction period. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a palatal orthodontic micro-implant according to a preferred embodiment of the present invention;

[0030] Figure 2 for Figure 1 The schematic diagram of the top view of the palatal orthodontic micro-implant is shown;

[0031] Figure 3 for Figure 1 A cross-sectional view of a portion of the structure of the palatal orthodontic micro-implant along a vertical plane;

[0032] Figure 4 for Figure 3 The schematic diagram of the state of the palatal orthodontic micro-implant when the unlocking piece is just inserted;

[0033] Figure 5 for Figure 4 The schematic diagram of the state of the palate orthodontic micro-implant after the unlocking piece pushes out the locking piece;

[0034] Figure 6 for Figure 5 The schematic diagram of the state of the palatal orthodontic micro-implant after the unlocking piece is pulled out and the flexible locking piece is installed;

[0035] In the accompanying drawings, 1. mounting head; 12. locking groove; 121. insertion port; 13. sliding port; 14. first side; 15. second side; 3. connecting section; 5. screw section; 51. first threaded area; 53. second threaded area; 54. chip guide channel; 6. self-locking component; 61. unlocking member; 612. second mating surface; 63. locking plate; 631. sliding portion; 632. bending portion; 633. first mating surface; 634. stop protrusion; 65. flexible locking member; 651. connecting rod; 652. end cap; 653. limiting flange. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be a component centered thereon. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a component centered thereon at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0039] Please also see Figure 1 and Figure 2A palatal orthodontic micro-implant screw provided in a preferred embodiment of the present invention comprises a mounting head 1, a connecting section 3 and a screw section 5 which are coaxially connected in sequence, and a self-locking component 6 is provided on the mounting head 1. The self-locking component 6 is used to lock the orthodontic rubber band on the mounting head 1 to prevent the rubber band from falling off from the palatal orthodontic micro-implant screw during orthodontic correction.

[0040] In this embodiment, the mounting head 1, the connecting section 3 and the screw section 5 are integrally formed. The mounting head 1 is used to connect with a tool such as a screwdriver to rotate the palatal orthodontic micro-implant so as to drive the screw section 5 into the tooth bone to achieve implantation of the implant. In this embodiment, the cross section of the mounting head 1 is roughly hexagonal, and the peripheral wall of the mounting head 1 includes six side surfaces. Please refer to Figure 3 The mounting head 1 is provided with a locking groove 12 and a plurality of sliding openings 13. The locking groove 12 is coaxial with the screw segment 5. The plurality of sliding openings 13 are arranged at intervals along the circumference of the mounting head 1 and are arranged around the periphery of the locking groove 12. The sliding openings 13 connect the locking groove 12 with the outside of the mounting head 1. In this embodiment, the locking groove 12 penetrates the end surface of the mounting head 1 away from the screw segment 5 to form an insertion opening 121. There are two sliding openings 13, and the two sliding openings 13 are respectively arranged on opposite sides of the locking groove 12. In this embodiment, the two sliding openings 13 are respectively arranged on two opposite side surfaces of the mounting head 1. In this embodiment, the side surface on which the sliding openings 13 are arranged on the peripheral wall of the mounting head 1 is the first side surface 14, and the remaining side surfaces constituting the peripheral wall are the second side surfaces 15. One end of each sliding opening 13 is connected with the locking groove 12, and the other end penetrates the outer side wall of the mounting head 1, that is, the first side surface 14, and is thus connected with the outside of the mounting head 1.

[0041] The connecting section 3 is in the shape of a smooth rod. The screw section 5 is used to embed into the tooth bone. Please refer to Figure 1In this embodiment, the outer surface of the screw segment 5 is provided with a first threaded area 51 and a second threaded area 53, the first threaded area 51 is located between the second threaded area 53 and the connecting section 3, and the length of the first threaded area 51 is smaller than the length of the second threaded area 53, and the pitch of the first threaded area 51 is smaller than the pitch of the second threaded area 53. When in use, the first threaded area 51 is used to be embedded in the inner cortical bone of the tooth bone, and the second threaded area 53 is used to be embedded in the inner cancellous bone of the tooth bone. Preferably, in this embodiment, the length of the first threaded area 51 is about 1 / 3 of the total length of the screw segment 5, the length of the second threaded area 53 is about 2 / 3 of the total length of the screw segment 5, and the pitch of the first threaded area 51 is approximately 1 / 2 of the pitch of the second threaded area 53. The end of the screw segment 5 away from the mounting head 1 is pointed to facilitate driving into the tooth bone under the action of external force. In this embodiment, a chip guide channel 54 is further provided on the outer surface of the screw segment 5. The chip guide channel 54 is arranged at the bottom end of the screw segment 5, and is used to guide the tooth bone debris generated during the implantation of the palatal orthodontic micro-implant into the alveolar of the second threaded zone 53, so that it can be discharged along the alveolar of the second threaded zone 53 and the alveolar of the first threaded zone 51, thereby making the implantation of the implant smoother.

[0042] The self-locking assembly 6 includes a plurality of locking pieces 63, which are respectively inserted into the plurality of sliding openings 13 in a sliding manner, and the locking pieces 63 can slide along the sliding openings 13 under force. In this embodiment, the self-locking assembly 6 includes two locking pieces 63, which are arranged opposite to each other and are respectively connected to the two sliding openings 13 in a sliding manner. Each locking piece 63 includes a sliding portion 631 and a bending portion 632, and the sliding portions 631 of the two locking pieces 63 are respectively inserted into the two sliding openings 13 in a sliding manner, and one end of the sliding portion 631 is located in the locking groove 12. A first mating surface 633 is provided at one end of the sliding portion 631 located in the locking groove 12, and along the direction close to the free end of the screw segment 5, the first mating surface 633 gradually tilts toward the direction close to the center of the locking groove 12. The bending portion 632 is located outside the mounting head 1, and the bending portion 632 is bent from one end of the sliding portion 631 away from the locking groove 12 toward the direction of the screw segment 5, thereby forming a hook portion together with the sliding portion 631. In this embodiment, the bending portion 632 is perpendicular to the sliding portion 631. The sliding portion 631 can be forced to slide along the corresponding sliding opening 13, so that the bending portion 632 is close to or away from the mounting head 1, and when the bending portion 632 is in a storage position close to the mounting head 1, the bending portion 632 is attached to the outer wall of the mounting head 1, that is, the first side surface 14.

[0043] In this embodiment, the thickness of the bending portion 632 is set to a, and the thickness a of the bending portion 632 should not be too large, preferably 0.5-1mm; the vertical distance between the first side 14 and the center O of the mounting head 1 is b, and the vertical distance between the second side 14 and the center O of the mounting head 1 is L. When the bending portion 632 is attached to the outer wall of the mounting head 1, L=a+b exists, thereby ensuring that the mounting head 1 can match the hexagonal mounting opening of the screwdriver used to screw the implant nail. In addition, the cross section of the mounting head 1 is set to a hexagon, so that the angle between the first side 14 and the second side 15 and the angle between the two adjacent second side surfaces 15 are both obtuse angles, which is less irritating to the human body and more comfortable to wear than the mounting head 1 whose cross section is set to a square or rectangular angle with a right angle. In addition, the first side 14 and the second side 15 and the two adjacent second side surfaces 15 can also be transitioned by rounded corners to further improve comfort.

[0044] In addition, in order to prevent the locking piece 63 from accidentally falling off from the sliding opening 13, in this embodiment, a stop protrusion 634 is further provided on the sliding portion 631, and the stop protrusion 634 is fixed to the bottom surface of the sliding portion 631 and received in the locking groove 12. When the locking piece 63 moves in a direction away from the locking groove 12 under the action of an external force, the stop protrusion 634 can abut against the inner wall of the locking groove 12, thereby preventing the locking piece 63 from falling off from the sliding opening 13.

[0045] The self-locking assembly 6 also includes an unlocking member 61, which is used to push the locking pieces 63 inserted in the sliding opening 13 in a direction away from the locking groove 12. The unlocking member 61 can be inserted into the locking groove 12 and abut against one end of the sliding parts 631 located in the locking groove 12, thereby pushing the bent part 632 to slide in a direction away from the locking groove 12. Please refer to Figure 4 and Figure 5 Specifically, the unlocking member 61 is generally in the shape of a long strip plate, and an inclined second mating surface 612 is provided at one end of the unlocking member 61 corresponding to the first mating surface 633, and the second mating surface 612 gradually tilts toward the center of the locking groove 12 along the direction close to the free end of the screw segment 5. During the process of inserting the unlocking member 61 into the locking groove 12, the second mating surface 612 slidably cooperates with the first mating surface 633 to push the sliding portion 631 to slide until the bending portion 632 is in a working position away from the mounting head 1.

[0046] Please also see Figure 6The self-locking component 6 also includes a flexible locking piece 65. When the bending portion 632 is in the working position and the unlocking piece 61 is in a separated state from the locking groove 12, the flexible locking piece 65 can be detachably inserted into the locking groove 12 and abut against one end of the sliding portion 631 located in the locking groove 12 to prevent the bending portion 632 from retracting under force. In this embodiment, the flexible locking member 65 is made of resin material, including a connecting rod 651, an end cap 652 fixed to one end of the connecting rod, and a limiting flange 653 protruding from the peripheral wall of the connecting rod 651 at one end away from the end cap 652. The connecting rod 651 is arranged between a plurality of sliding parts 631 and abuts against one end of the plurality of sliding parts 631 located in the locking groove 12. The end cap 652 abuts against the end surface of the mounting head 1 facing away from the connecting section 3. The limiting flange 653 is accommodated in the locking groove 12 and abuts against the side of the plurality of sliding parts 631 facing the connecting section 3 to prevent the flexible locking member 65 from accidentally falling off from the locking groove 12 during the correction process, thereby further improving the stability of self-locking. The flexible end cap 652 covers the end surface of the mounting head 1 facing away from the connecting section 3. During the correction process, the human body's tongue and the like come into contact with the flexible end cap 652, thereby further improving the comfort. The flexible locking member 65 made of resin material can be deformed under the action of an external force greater than a preset value, thereby facilitating insertion into or extraction from the locking groove 12 .

[0047] In this embodiment, the screw section 5, the mounting head 1, and the connecting section 3 are all made of stainless steel and have titanium nitride coatings on their surfaces. The unlocking member 61 is preferably made of metal such as stainless steel.

[0048] The embodiment of the present invention also provides a method for using a palatal orthodontic micro-implant, comprising the following steps:

[0049] Step S1: providing the palate orthodontic micro-implant of the present embodiment. In the initial state, the bent portion 632 is attached to the outer wall of the mounting head 1 .

[0050] Step S2: Disinfect the location where implantation is required, and use the back of a knife to make a mark at a preset implantation location in the oral cavity, such as the mid-jaw suture, to determine the mesial and distal position of the implant pin.

[0051] Step S3: Install the screwdriver on the mounting head 1 of the palatal orthodontic micro-implant. Specifically, the mounting opening of the screwdriver can be placed outside the mounting head 1, and the bottom end of the screw segment of the palatal orthodontic micro-implant is aligned with the position of the mark, and the screw segment of the palatal orthodontic micro-implant is screwed into the tooth bone using the screwdriver. In the initial state, the locking piece 63 is in a storage position that fits the peripheral wall of the mounting head 1, so that the mounting opening of the screwdriver can be smoothly mounted on the mounting head 1.

[0052] Step S4: Insert the unlocking member 61 into the locking groove 12, so that the locking piece 63 slides along the sliding opening 13 until the bent portion 632 slides to a working position away from the mounting head 1, so that the bent portion 632 and the sliding portion 631 form a hook, and then the unlocking member 61 is pulled out. Specifically, the end of the unlocking member 61 provided with the second mating surface 612 is inserted into the locking groove 12. In this process, the locking piece 63 can be pushed outward through the cooperation between the second mating surface 612 and the first mating surface 633 until the stop protrusion 634 abuts against the inner wall of the locking groove 12. At this time, the bent portion 632 slides to a working position away from the mounting head 1.

[0053] In this embodiment, when the bending portion 632 is in the working position and the unlocking member 61 is in a separated state from the locking groove 12, the flexible locking member 65 is detachably inserted into the locking groove 12 and abuts against one end of the sliding portion 631 located in the locking groove 12 to prevent the bending portion 632 from retracting under force.

[0054] Step S5: During orthodontic correction, the rubber band used for orthodontic correction is hooked on the hook formed by the bending portion 632 and the sliding portion 631 .

[0055] When the orthodontic correction is completed and the palatal orthodontic micro-implant needs to be removed, first, the traction rope used for orthodontic correction is removed from the hook formed by the bending portion 632 and the sliding portion 631, and then, the flexible locking piece 65 filled in the locking groove 12 is taken out using tweezers or other tools, and the locking piece 63 is pushed to make the bending portion 632 fit on the outer wall of the mounting head 1, and finally, a screwdriver is installed on the head of the palatal orthodontic micro-implant, and the palatal orthodontic micro-implant can be unscrewed using the screwdriver.

[0056] In this embodiment, the total length of the palatal orthodontic micro-implant can be 7.8-8.2mm. In the prior art, in order to ensure the stability of the orthodontic implant and the tooth bone, the length of the stainless steel orthodontic implant is usually not less than 10mm, which causes great damage to the tooth bone after installation. The palatal orthodontic micro-implant of this embodiment is made of stainless steel and has a titanium nitride coating on the surface, so that the palatal orthodontic micro-implant can meet the hardness and biocompatibility requirements of the implant, and the first threaded area 51 with a smaller pitch cooperates with the cementum to further improve the stability of the implant and the bone, so that it can be stably combined with the tooth bone while reducing the overall length of the implant, thereby reducing damage to the tooth bone.

[0057] When the above-mentioned palatal orthodontic micro-implant is used, the locking piece 63 can be pushed out by the unlocking piece 61, so that the sliding part 631 and the bending part 632 form a hook for hooking a rubber band, thereby preventing the rubber band from falling off the orthodontic implant. The setting of the locking piece 63 of the above-mentioned palatal orthodontic micro-implant can form a hook located outside the mounting head 1, and the rubber band is hooked by using the space outside the mounting head 1, so that it is possible to set multiple locking pieces 63 on a smaller implant, so that multiple rubber bands pulling in different directions can be hooked on one implant, and the hook is set on the side of the mounting head 1, which can reduce the thickness of the mounting head 1. When the implant is implanted in the jaw, the foreign body sensation can be reduced and the wearing comfort can be improved; at the same time, when installing the rubber band, the rubber band can be directly hooked on the hook 1, and the restriction of the hook makes it difficult for the rubber band to fall off, the operation difficulty is low, and the use is more convenient. In addition, when the above-mentioned palatal orthodontic micro-implant is used, during the entire orthodontic correction period, it is only necessary to slide the locking plate 63 during the first installation to avoid deformation or loosening of the locking plate 63 due to multiple pulling and pulling of the locking plate 63, which is beneficial to improving the stability of self-locking.

[0058] The above-mentioned palatal orthodontic micro-implant, its screw segment 5 includes a first threaded zone 51 with a smaller pitch and a second threaded zone 53 with a larger pitch. The second threaded zone 53 has the same pitch as the thread of the palatal orthodontic micro-implant in the prior art. The pitch of the first threaded zone 51 is smaller, and its combination with the bone cortex is more stable.

[0059] The material of the above-mentioned palatal orthodontic micro-implant is stainless steel, which can make the overall hardness of the palatal orthodontic micro-implant meet the requirements of installation surgery and wearing. The setting of the titanium nitride coating can increase the biocompatibility of the palatal orthodontic micro-implant. Through the combination of stainless steel and titanium nitride coating, the palatal orthodontic micro-implant can meet the hardness and biocompatibility requirements of the implant, thereby enabling it to be stably combined with the tooth bone while reducing the overall length of the implant, thereby reducing damage to the tooth bone. Moreover, due to its high hardness, it is not easy to break and has a long service life, which can reduce the number of installations during the correction period.

[0060] It can be understood that the number of the locking pieces 634 and the sliding openings 13 is not limited to two in the present embodiment. In other embodiments, the number of the locking pieces 634 and the sliding openings 13 can be multiple.

[0061] It can be understood that in other embodiments, the chip guide channel 54 can be omitted.

[0062] It can be understood that in other implementations, the mounting head 1 is not limited to the hexagonal shape of the present embodiment, and may also be other shapes such as a square.

[0063] It is understandable that in other embodiments, a receiving groove may be recessed on the outer wall of the mounting head 1, and when the locking piece 5 is in a retracted state, it can be received in the receiving groove of the mounting head 1, thereby not affecting the screwing of the implant nail by the screwdriver.

[0064] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A palatal orthodontic micro-implant, comprising a mounting head (1), a connecting section (3) and a screw section (5) which are coaxially connected in sequence, characterized in that: The mounting head (1) is provided with a plurality of sliding openings (13), and the plurality of sliding openings (13) are arranged at intervals along the circumference of the mounting head (1); the palatal orthodontic micro-implant screw further comprises a self-locking component (6) arranged on the mounting head (1), the self-locking component (6) comprises a plurality of locking plates (63), each locking plate (63) comprises a sliding portion (631) and a bending portion (632) formed by bending one end of the sliding portion (631) toward the screw segment (5), the plurality of sliding portions (631) are respectively inserted in the plurality of sliding openings (13) in a sliding manner, and the sliding portion (631) can slide along the sliding opening (13) under force, so that the bending portion (632) is close to or away from the mounting head (1).

2. The palate orthodontic micro-implant according to claim 1, characterized in that: A locking groove (12) is also recessed on the end surface of the mounting head (1) facing away from the connecting section (3); a plurality of sliding openings (13) are arranged at intervals around the periphery of the locking groove (12) and one end of each of the sliding openings is connected to the locking groove (12); an end of the sliding portion (631) away from the bending portion (632) is located in the locking groove (12); the self-locking component (6) further comprises an unlocking member (61), the unlocking member (61) can be inserted into the locking groove (12) and abut against one end of a plurality of the sliding portions (631) located in the locking groove (12), thereby pushing the bending portion (632) to slide in a direction away from the locking groove (12).

3. The palate orthodontic micro-implant according to claim 2, characterized in that: One end of the sliding portion (631) located in the locking groove (12) is provided with an inclined first mating surface (633), and one end of the unlocking member (61) is provided with an inclined second mating surface (612). When the unlocking member (61) is inserted into the locking groove (12), the second mating surface (612) and the first mating surface (633) are slidably matched to push the sliding portion (631) to slide until the bending portion (632) is in a working position away from the mounting head (1).

4. The palate orthodontic micro-implant according to claim 3, characterized in that: The self-locking component (6) comprises a flexible locking member (65). When the bending portion (632) is in the working position and the unlocking member (61) and the locking groove (12) are in a separated state, the flexible locking member (65) is detachably inserted into the locking groove (12) and abuts against one end of the sliding portion (631) located in the locking groove (12) to prevent the bending portion (632) from retracting under force.

5. The palate orthodontic micro-implant according to claim 4, characterized in that: The flexible locking member (65) is made of resin material, and comprises a connecting rod (651), an end cap (652) fixed to one end of the connecting rod, and a limiting flange (653) protruding from the peripheral wall of the connecting rod (651) at one end away from the end cap (652). The connecting rod (651) is arranged between a plurality of the sliding parts (631) and abuts against one end of the plurality of the sliding parts (631) located in the locking groove (12). The end cap (652) abuts against the end surface of the mounting head (1) facing away from the connecting section (3). The limiting flange (653) is received in the locking groove (12) and abuts against one side of the plurality of the sliding parts (631) facing the connecting section (3).

6. The palate orthodontic micro-implant according to claim 2, characterized in that: The bent portion (632) is located outside the mounting head (1), and when the unlocking member (61) and the locking groove (12) are in a separated state, the locking plate (63) is subjected to force to enable the bent portion (632) to move in a direction close to the locking groove (12) until the bent portion (632) is in contact with the outer wall of the mounting head (1).

7. The palate orthodontic micro-implant according to claim 1, characterized in that: The outer surface of the screw segment (5) is provided with a first threaded zone (51) and a second threaded zone (53); the first threaded zone (51) is located between the second threaded zone (53) and the connecting segment (3); the length of the first threaded zone (51) is smaller than the length of the second threaded zone (53); and the pitch of the first threaded zone (51) is smaller than the pitch of the second threaded zone (53).

8. The palate orthodontic micro-implant according to claim 1, characterized in that: The screw segment (5), the mounting head (1) and the connecting segment (3) are all made of stainless steel and have titanium nitride coatings on their surfaces.

9. A method for using a palatal orthodontic micro-screw, characterized in that: The following steps are involved: Step S1: providing the palatal orthodontic micro-implant as claimed in claim 1; Step S2: disinfect the location where implantation is required, and use the back of a knife to make a mark on the preset implantation location in the oral cavity to determine the mesial and distal position of the implantation pin; Step S3: installing a screwdriver on the mounting head (1) of the palatal orthodontic micro-implant, aligning the bottom end of the screw segment (5) of the palatal orthodontic micro-implant with the position of the mark, and screwing the screw segment (5) of the palatal orthodontic micro-implant into the tooth bone using the screwdriver; Step S4: inserting the unlocking member (61) into the locking groove (12) so that the locking piece (63) slides along the sliding opening (13) until the bending portion (632) slides to a working position away from the mounting head (1), thereby forming a hook portion between the bending portion (632) and the sliding portion (631), and pulling out the unlocking member (61); Step S5: During orthodontic correction, the rubber band used for orthodontic correction is hooked on the hook formed by the bending portion (632) and the sliding portion (631).

10. The method for using the palate orthodontic micro-implant according to claim 9, characterized in that: The self-locking component (6) also includes a flexible locking member (65). In step S4, when the bending portion (632) is in the working position and the unlocking member (61) and the locking groove (12) are in a separated state, the flexible locking member (65) is detachably inserted into the locking groove (12) and abuts against one end of the sliding portion (631) located in the locking groove (12) to prevent the bending portion (632) from retracting under force.

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