Orthodontic target positioning device and transfer positioning method

Abstract

The present invention relates to a tooth correction target positioning device and a transfer positioning method, the device includes a positioning ruler, a sleeve, an archwire bracket and an archwire; the positioning ruler and the sleeve are used to form a position reference on a tooth model for a correction target designed by a computer, and then the correction target is transferred into the mouth and fixed on the hard palate with the help of the archwire bracket and the archwire, so as to form a controllable correction target method. The present invention has the characteristics of unique conception, reasonable positioning device structure, simple target transfer operation, and easy clinical control.

Description

Technical field:

[0001] The present invention belongs to the field of oral orthodontics, and particularly relates to a tooth correction target positioning device and a transfer positioning method, and in particular, a correction method that can transfer a computer-aided designed target into a mouth with the aid of a positioning device and form a target reference. Background technology:

[0002] Existing computer-aided design plays an important role in all walks of life. It can not only design and simulate real products, but also predict the results of changes or design target results. In the field of orthodontics, the concept of target design is also introduced, which can not only predict the results of correction, but also interpret the change process in stages, turning the traditional unpredictable correction process into a predictable goal. However, it is still difficult to grasp in clinical practice, because the computer design goals cannot be accurately transferred to the mouth and can only be used as a reference for clinicians.

[0003] To this end, an apparatus and method capable of transferring the design target to the inside are provided, which becomes the object of the present invention. Summary of the invention:

[0004] The purpose of the present invention is to design a tooth correction target positioning device and transfer positioning method which can transfer the correction target designed by computer to the hard palate in the mouth through a positioning ruler to form a correction reference.

[0005] The technical solution of the present invention is achieved in this way:

[0006] A tooth correction target positioning device, characterized in that it includes:

[0007] The positioning ruler has a center rod, anterior teeth adjustment rod, left teeth adjustment rod and right teeth adjustment rod, which are placed on the crowns of the anterior teeth and left and right posterior teeth of the dental model. The three points determine the target occlusal plane for correction and provide a central axis reference;

[0008] The sleeve has a rectangular hole that matches the front end of the center rod, can be sleeved on the front end of the center rod, and bonded to the front tooth gap of the tooth model to serve as a fulcrum for positioning the archwire bracket;

[0009] The archwire bracket is connected in sequence by a connecting rod, an archwire slot and an anchoring frame; the connecting rod is inserted into the rectangular hole of the sleeve to form a constraint, and is adjusted to a position corresponding to the correction amount of the anterior teeth, and the anchoring frame can be fixed to the hard palate by an implant anchoring nail;

[0010] The archwire is a hard material with an arc-shaped non-deformable structure designed according to the correction goal, and the middle part can be locked in the archwire slot.

[0011] The front teeth adjustment rod in the positioning ruler is movably arranged at the front part of the center rod, parallel to the front end of the center rod, and can be adjusted in the vertical direction, and is placed on the front teeth crown to form a center fulcrum; the left teeth adjustment rod is perpendicular to the center rod and movably arranged at the rear part of the center rod, and can slide forward and backward along the center rod, and can be adjusted in the vertical direction, and is placed on the left posterior teeth crown to form a left fulcrum; the right teeth adjustment rod is perpendicular to the center rod and movably arranged at the rear part of the center rod, and can slide forward and backward along the center rod, and can be adjusted in the vertical direction, and is placed on the side posterior teeth crown to form a right fulcrum.

[0012] The cross-section of the center rod is a rectangular structure, and a vertical groove is provided at the front. A reference rod extends forward from the vertical groove, and the sleeve is positioned with the help of the reference rod; the vertical groove is used to position the front tooth adjustment rod, and the front vertical rod connected to the end of the front tooth adjustment rod slides through the vertical groove; the left tooth adjustment rod is slidably positioned on the center rod with the help of a left sliding seat, and a left vertical groove is provided on the left sliding seat, and the left vertical rod connected to the end of the left tooth adjustment rod slides through the left vertical groove; the right tooth adjustment rod is slidably positioned on the center rod with the help of a right sliding seat, and a right vertical groove is provided on the right sliding seat, and the right vertical rod connected to the end of the right tooth adjustment rod slides through the right vertical groove.

[0013] The vertical groove, the left vertical groove and the right vertical groove of the center rod are all provided with locking top screws passing through the vertical grooves.

[0014] A method for realizing the transfer positioning of a tooth correction target by using the above-mentioned tooth correction target positioning device is provided, and the specific steps are as follows:

[0015] 1. Determine the treatment goal. Import oral images through computers, and design treatment goals based on the oral images to determine the amount of anterior teeth correction and the position of the occlusal plane; and make tooth models;

[0016] 2. Determine the occlusal plane. On the dental model, use the front teeth adjustment rod on the positioning ruler to place it on a pair of incisors, and the left and right teeth adjustment rods to place them on the left and right posterior teeth crowns respectively. Adjust the end face of the front teeth adjustment rod to be flush with the front teeth surface. Determine the occlusal plane at three points on the dental model.

[0017] 3. Bonding sleeve. The sleeve is based on the reference rod at the front end of the center rod of the positioning ruler. It is inserted and bonded to the front teeth of the tooth model. The occlusal plane determined by the positioning ruler is transferred to the sleeve, and the sleeve is used as the occlusal plane reference for the introduction of the orthodontic appliance.

[0018] Fourth, insert the archwire bracket, insert the sleeve and adjust the forward and backward movement of the archwire bracket with the help of the connecting rod at the front end of the archwire bracket. The movement is the thickness of the lingual bracket plus the correction amount of the target anterior teeth;

[0019] 5. Insert the archwire, put the archwire into the archwire slot of the archwire bracket, adjust the center position and tie it;

[0020] 6. Casting transfer guide: Use resin to cast the transfer guide on the crown, and connect the sleeve, archwire bracket and archwire into one; after curing, separate the whole from the tooth model to form a transfer guide with archwire bracket and archwire;

[0021] 7. Place the transfer guide plate prepared above into the transfer mouth, adjust the transfer guide plate so that the crown depression is aligned with the crown of the tooth and fits well; then plant the anchor pin in the hard palate and ligate and fix the archwire bracket;

[0022] 8. Remove the transfer guide, cut the connecting rod of the arch wire bracket, remove the transfer guide, leaving the arch wire and the anchor frame of the arch wire bracket. The arch wire is the target position for correction.

[0023] The present invention has the characteristics of unique conception, reasonable positioning device structure, simple target transfer operation, and easy clinical manipulation. The positioning device is used to quantify the invisible correction target simulated by the computer and form a correction reference on the tooth model, which is then transferred into the mouth and fixed on the hard palate, forming a controllable correction target scheme. Description of the drawings:

[0024] The present invention will be further described below in conjunction with specific illustrations:

[0025] Figure 1 Schematic diagram of the positioning ruler

[0026] Figure 2 Schematic diagram of the positioning ruler

[0027] Figure 3 Schematic diagram of the relationship between the archwire bracket and the sleeve

[0028] Figure 4 Schematic diagram of the positioning ruler placed on the tooth model

[0029] Figure 5 Schematic diagram of the front teeth of the sleeve bonding tooth model

[0030] Figure 6 Schematic diagram of the relationship between the sleeve and the front teeth of the tooth model

[0031] Figure 7 Schematic diagram of the relationship between the archwire bracket and the sleeve

[0032] Figure 8 Schematic diagram of the relationship between the archwire bracket and the archwire

[0033] Fig. 9 Schematic diagram of casting transfer guide

[0034] Fig.10 Schematic diagram of the transfer guide with archwire bracket

[0035] Fig.11 Schematic diagram of the transfer guide plate placed on the teeth in the mouth

[0036] Fig.12 Schematic diagram of intraoral target positioning

[0037] Fig.13 Schematic diagram of the relationship between target positioning and brackets

[0038] in

[0039] 1—positioning ruler 11—center rod 111—vertical groove 112—reference rod

[0040] 12—front tooth adjustment rod 121—front vertical rod 13—left tooth adjustment rod 131—left vertical rod

[0041] 14—right tooth adjustment rod 141—right vertical rod 15—left sliding seat 151—left vertical groove

[0042] 16—right slide 161—right vertical groove 17—locking top screw 2—sleeve

[0043] 21—rectangular hole 3—arch wire bracket 31—connecting rod 311—scale line

[0044] 32 - Archwire slot 33 - Anchor frame 4 - Archwire 5 - Tooth model

[0045] 51—Bracket 6—Transfer guide 7—Anchor nail Specific implementation method:

[0046] Reference Figure 1 , Figure 2 and Figure 3 The tooth correction target positioning device comprises the following components: a positioning ruler 1, a sleeve 2, an arch wire bracket 3 and an arch wire 4.

[0047] The positioning ruler 1 comprises a center rod 11, a front tooth adjustment rod 12, a left tooth adjustment rod 13 and a right tooth adjustment rod 14; wherein:

[0048] The cross section of the center rod 11 is a rectangular structure, and the bottom plane is used as an observation and measurement reference plane, such as the XY plane of a three-dimensional coordinate system, and the center plane of the center rod 11 is the XZ plane; a vertical groove 111 is provided at the front of the center rod 11, and a reference rod 112 extends forward from the vertical groove 111, and the sleeve is positioned by means of the reference rod 112;

[0049] The front teeth adjustment rod 12 is movably arranged in the vertical groove 111 at the front part of the center rod, that is, the front teeth adjustment rod 12 is slidably penetrated into the vertical groove 111 by means of the front vertical rod 121 connected to the end, and is parallel to the reference rod 112 at the front end of the center rod 11, and can be adjusted in the vertical direction along the vertical groove 111 to adjust the occlusal plane, that is, the plane parallel to the XY plane; the front teeth adjustment rod 12 is placed on the front teeth crown to form a central fulcrum, and the front end face is adjusted to be flush with the tooth surface, that is, the front end face is the YZ plane of the three-dimensional coordinate.

[0050] The left tooth adjustment rod 13 is perpendicular to the center rod 11 and is movably arranged at the rear of the center rod. It can slide forward and backward along the center rod 11 and can be adjusted in the vertical direction. It is placed on the left posterior tooth crown to form a left fulcrum. More specifically, the left tooth adjustment rod 13 is slidably positioned on the center rod 11 by means of a left slide seat 15. The left slide seat 15 is provided with a left vertical groove 151. The left vertical rod 131 connected to the end of the left tooth adjustment rod 13 slides through the left vertical groove 151 to achieve vertical adjustment.

[0051] The right tooth adjustment rod 14 is perpendicular to the center rod 11 and is movably arranged at the rear of the center rod 11. It can slide forward and backward along the center rod 11 and can be adjusted in the vertical direction. It is placed on the posterior crown of the side to form a right fulcrum. More specifically, the right tooth adjustment rod 14 is slidably positioned on the center rod 11 by means of a right slide seat 16. The right slide seat 16 is provided with a right vertical groove 161. The right vertical rod 141 connected to the end of the right tooth adjustment rod 14 slides through the right vertical groove 161 to achieve vertical adjustment.

[0052] The forward and backward movement of the left tooth adjustment rod 13 and the right tooth adjustment rod 14 can selectively place the position of the posterior tooth crown to adjust the occlusal plane. That is, by placing the positioning ruler 1 on the crowns of the front teeth and the left and right posterior teeth of the tooth model 5, the three points determine the target occlusal plane for correction and provide the central axis reference. The vertical groove 111, the left vertical groove 151 and the right vertical groove 161 of the center rod are all equipped with locking top screws 17 passing through the vertical grooves to lock the three fulcrums so that the center rod 11 is in a stable position for other operations.

[0053] The sleeve 2 has a rectangular hole 21 that matches the reference rod 112 at the front end of the center rod 11. It can be sleeved on the reference rod 112 at the front end of the center rod and bonded to the front tooth gap of the tooth model 5 to serve as a fulcrum for positioning the arch wire bracket 3. It is also a reference for quantitatively adjusting the positioning ruler 1 through the sleeve 2, transferred and solidified on the tooth model 5.

[0054] The archwire bracket 3 is connected in sequence by a connecting rod 31, an archwire slot 32 and an anchor frame 33; the connecting rod 31 is passed through the rectangular hole 21 of the sleeve to form a constraint and is adjusted to a position corresponding to the amount of anterior tooth correction; during processing, the archwire bracket 3 and the bracket 51 are matched with each other, and a scale line 311 is set on the connecting rod 31 to observe and adjust the movement amount.

[0055] The archwire 4 is made of hard material and is designed according to the correction target. The middle part can be locked in the archwire slot 32. Since the archwire 4 is hard and non-deformable, its position is the correction target position; the bracket bonded to the lingual side gradually moves closer to the archwire 4 and forms a conflicting alignment under the action of the ligation force or other resistance force. For this reason, the archwire 4 is different from the traditional archwire and is designed as the correction reference position.

[0056] Reference Figures 4 to 13 , a tooth model 5, i.e., a tooth model before correction, is generated for transfer operation of correction target benchmark; that is, after the bracket 51 is bonded to the lingual side of the tooth model 5 and ligated with the arch wire 4, the sleeve 2, the arch wire bracket 3 and the arch wire 4 are connected into one by casting resin on the crown, and separated after solidification to form a transfer guide 6 with the arch wire bracket and the arch wire, which is clinically transferred to the mouth, and fixed and then ligated with the lingual bracket 51.

[0057] Combination Figures 4 to 13 The following is a method for implementing a tooth correction target transfer positioning method using the above-mentioned tooth correction target positioning device, and the specific steps are as follows:

[0058] 1. Determine the treatment goal. Import oral images through computers or use Micro-CT scanning to obtain oral 3D images. Based on the oral images, design the treatment goals, determine the amount of anterior tooth correction, and the position of the occlusal plane; and make the original tooth model before correction based on the image data5, such as Figure 4 ;

[0059] 2. Determine the occlusal plane. Use the positioning ruler 1 mentioned above to determine the occlusal plane on the tooth model 5; the front teeth adjustment rod 12 on the positioning ruler rests on a pair of incisors, and the left and right teeth adjustment rods 13 and 14 rest on the left and right posterior teeth crowns respectively. Adjust the end face of the front teeth adjustment rod 12 to be flush with the front teeth surface, and determine the occlusal plane at three points on the tooth model 5; the following is an example of the correction scheme of 2mm inward and 1mm lowering of the front teeth: in the initial design state of the positioning ruler 1, the bottom surface of the front teeth adjustment rod 12 is flush with the bottom surface of the center rod 11 as the original plane. When the correction is lowered by 1mm, the front teeth adjustment rod 12 can be raised by 1mm in the vertical direction. At this time, the front teeth adjustment rod 12 is placed on the front teeth crown, and the bottom surface of the center rod 11 is the occlusal plane of the correction target; Figure 4 ;

[0060] 3. Bonding sleeve. Sleeve 2 is based on the reference rod 112 at the front end of the center rod of the positioning ruler. It is inserted and bonded to the front teeth of the tooth model 5. The occlusal plane determined by the positioning ruler 1 is transferred to the sleeve 2. Then, the sleeve 2 is used as the occlusal plane reference for the introduction of the orthodontic appliance. Figure 5 and Figure 6 ;

[0061] Fourth, insert the archwire bracket, insert the sleeve 2 with the help of the connecting rod 31 at the front end of the archwire bracket 3, and adjust the forward and backward movement of the archwire bracket 3. The movement is the thickness of the lingual bracket 51 plus the correction amount of the target anterior teeth. When designing and manufacturing the archwire bracket 3, a scale line 311 of the connecting rod 31 is a specific alignment line. The alignment line is flush with the inner end surface of the sleeve 2, and the archwire slot 32 and the inner end surface of the sleeve 2 are exactly one tooth thickness apart. For this reason, the connecting rod 31 is adjusted to the correction amount of 2mm inward plus the thickness of the specific bracket 51. Assuming that the patient's tooth thickness exceeds the design parameters, one can use adhesive to compensate, or adjust the actual measured difference through the scale line 311 on the connecting rod; the correction amount can be determined through the archwire bracket 3; such as Figure 6 and Figure 7 ;

[0062] Fifth, insert the archwire, put the archwire 4 into the archwire slot 32 of the archwire bracket, adjust the center position and tie it; that is, transfer the correction target to the hard and non-deformable archwire 4; Figure 8 ;

[0063] 6. Casting transfer guide: Use resin to cast transfer guide 6 on the crown, and connect sleeve 2, arch wire bracket 3 and arch wire 4 into one body; after curing, separate the whole from tooth model 5 to form transfer guide 6 with arch wire bracket and arch wire, so as to prepare for the transfer of treatment target to the mouth; Fig. 9 and Fig.10 ;

[0064] 7. Transfer the transfer guide plate 6 prepared above into the mouth, adjust the transfer guide plate 6 so that the crown depression is aligned with the tooth crown and fits well; then plant the anchor nail 7 in the hard palate, tie and fix the archwire bracket 3, more specifically, anchor the anchor frame 33 on the hard palate through the anchor nail 7; connect the correction target with the hard palate in the mouth; Fig.11 ;

[0065] 8. Remove the transfer guide, cut the connecting rod 31 of the archwire bracket, that is, cut it at the connection with the archwire slot 32, remove the transfer guide 6, and leave the archwire 4 and the anchor frame 33 of the archwire bracket. The archwire 4 is locked in the hard palate by the anchor frame 33, and the position of the archwire 4 is the correction target position; clinically, it is only necessary to bond the corresponding bracket 51 on the lingual side of the tooth, and tie it with the archwire 4 one by one, adjust the correction force, and the correction force gradually shrinks the tooth to the archwire 4, that is, touches the archwire 4, and completes the correction target, such as Fig.12 and Fig.13 .

[0066] In summary, through the orthodontic target positioning device, the computer virtual orthodontic target can be transferred to the mouth, and precise customization can be implemented to solve clinical operations.

Claims

1. A tooth correction target positioning device, characterized in that: Included are: The positioning ruler (1) comprises a center rod (11), an anterior teeth adjustment rod (12), a left teeth adjustment rod (13) and a right teeth adjustment rod (14), which are placed on the crowns of the anterior teeth and the left and right posterior teeth of the tooth model (5), and the three points determine the target occlusal plane for correction and provide a central axis reference; the anterior teeth adjustment rod (12) is movably arranged at the front of the center rod (11), parallel to the front end of the center rod (11), and can be adjusted in the vertical direction, and is placed on the crowns of the anterior teeth to form a central fulcrum; the left teeth adjustment rod (13) is perpendicular to the center rod (11) and movably arranged at the rear of the center rod (11), can slide forward and backward along the center rod (11), and can be adjusted in the vertical direction, and is placed on the crowns of the left posterior teeth to form a left fulcrum; the right teeth adjustment rod (14) is perpendicular to the center rod (11) and movably arranged at the rear of the center rod (11), can slide forward and backward along the center rod (11), and can be adjusted in the vertical direction, and is placed on the crowns of the left posterior teeth to form a left fulcrum. The sleeve (2) has a rectangular hole (21) that matches the front end of the center rod (11), can be sleeved on the front end of the center rod (11), and bonded to the front teeth gap of the tooth model (5), serving as a fulcrum for positioning the arch wire bracket (3); the center rod (11) has a rectangular cross-section, and a vertical groove (111) is provided at the front, and a reference rod (112) extends forward from the vertical groove (111), and the sleeve (2) is positioned with the help of the reference rod (112); the vertical groove (111) is used to position the front teeth adjustment rod (12), and the front vertical rod (121) connected to the end of the front teeth adjustment rod (12) is slidably penetrated by the front vertical rod (121) The left tooth adjustment rod (13) is slidably positioned on the center rod (11) by means of a left slide seat (15), the left slide seat (15) is provided with a left vertical groove (151), and a left vertical rod (131) connected to the end of the left tooth adjustment rod (13) is slidably inserted into the left vertical groove (151); the right tooth adjustment rod (14) is slidably positioned on the center rod (11) by means of a right slide seat (16), the right slide seat (16) is provided with a right vertical groove (161), and a right vertical rod (141) connected to the end of the right tooth adjustment rod (14) is slidably inserted into the right vertical groove (161); The archwire bracket (3) is connected in sequence by a connecting rod (31), an archwire slot (32) and an anchor frame (33); the connecting rod (31) is inserted into the rectangular hole (21) of the sleeve (2) to form a constraint, and is adjusted to a position corresponding to the correction amount of the anterior teeth, and the anchor frame (33) can be fixed to the hard palate by an implant anchor nail (7); The archwire (4) is made of a hard material and has an arc-shaped non-deformable structure designed according to the correction target, and the middle portion of the archwire can be locked in the archwire slot (32); The archwire support (3) and the bracket are matched with each other, and a scale line (311) is provided on the connecting rod (31) to observe and adjust the movement amount.

2. The orthodontic target positioning device according to claim 1, characterized in that: The vertical groove (111), the left vertical groove (151) and the right vertical groove (161) of the center rod (11) are all provided with locking top screws (17) passing through the vertical grooves.

3. A method for manufacturing a tooth correction target positioning device, characterized in that: The specific steps are as follows:

1. Determine the treatment goal by importing oral images through a computer, and based on the oral images, design the treatment goal, determine the amount of anterior tooth correction, and the position of the occlusal plane; and make a tooth model (5); 2. Determine the occlusal plane. On the tooth model (5), use the front teeth adjustment rod (12) on the positioning ruler (1) to rest on a pair of incisors, and the left and right teeth adjustment rods (13) (14) to rest on the crowns of the left and right posterior teeth respectively. Adjust the end surface of the front teeth adjustment rod (12) to be flush with the front teeth surface, and determine the occlusal plane at three points on the tooth model (5); 3. bonding the sleeve (2), wherein the sleeve (2) is based on the reference rod (112) at the front end of the center rod (11) of the positioning ruler, is inserted into and bonded to the front teeth of the tooth model (5), and the occlusal plane determined by the positioning ruler (1) is transferred to the sleeve (2), and the sleeve (2) is then used as the occlusal plane reference for introducing the orthodontic appliance; Fourth, insert the archwire bracket (3), insert the sleeve (2) with the help of the connecting rod (31) at the front end of the archwire bracket (3), and adjust the forward and backward movement of the archwire bracket (3), which is the thickness of the lingual bracket plus the correction amount of the target anterior teeth; 5. Inserting the archwire (4): inserting the archwire (4) into the archwire slot (32) of the archwire bracket (3), adjusting the center position and tying the archwire; 6. Casting the transfer guide (6), using resin to cast the transfer guide (6) on the crown, and connecting the sleeve (2), the arch wire bracket (3) and the arch wire (4) into one body; after curing, the whole is separated from the tooth model (5) to form a transfer guide (6) with the arch wire bracket (3) and the arch wire (4).

Images