Method for straightening teeth using single-day aligners

Abstract

The invention relates to orthodontics and is intended for use in correcting malocclusion. A 3D image of a patient's teeth is obtained. An initial position and a final post-treatment position of the teeth are determined by virtual planning. The trajectory of the movement of a patient's tooth from its initial position to the final position is determined. A step-by-step treatment plan is established, wherein the duration of each step ranges between one and five days and includes daily replacement of aligners. At each step, the aligners are replaced with aligners that have a new shape. Furthermore, at each step, aligners that have a specific pressing force are used. At the steps of the treatment, the process of the movement of the teeth to the desired position is monitored using a check template. The use of single-day aligners makes it possible to accelerate the treatment process as well as to avoid abrupt changes in pressure on the teeth, thus preventing painful and unpleasant sensations for the patient.

Description

[0001] A method for straightening teeth using daily aligners

[0002] Field of technology to which the invention relates

[0003] The invention relates to medicine, more precisely to dentistry, namely orthodontics, and is intended to achieve the desired position of teeth, for example, to correct a malocclusion.

[0004] State of the art

[0005] A method for orthodontic treatment of dentoalveolar anomalies is known from the prior art, including distalization of teeth, in which a fixed orthodontic appliance and a series of sequentially installed aligners are used for the patient, wherein at the stage of virtual treatment planning the final position of the teeth is determined and a series of sequentially installed aligners are manufactured for moving the teeth, based on a 3D model of the jaw before treatment and an SD model of the jaw after treatment, and each subsequent aligner in the series is installed sequentially (RU 2812389 C1, published 01 / 30 / 2024).

[0006] From document RU 2810959 C2, published 09.01.2024, a method for orthodontic treatment of patients with distal occlusion in mixed dentition is known, using a set of aligners, including a patient examination by collecting anamnesis, examining the face and oral cavity, conducting functional tests and using diagnostic methods necessary for making a diagnosis and choosing the optimal treatment plan: computed tomography, teleradiography, orthopantomography and photography, obtaining scans from the upper and lower jaws, as well as in the constructive bite; based on the obtained data, tooth movements are modeled using a 3D digital model, in the first stage - the leveling stage - the dental arches are expanded, crowding and rotation of the teeth are eliminated and the inclination of the frontal group of teeth is corrected; after the first stage, at least two aligners are installed on the upper and lower dentition to correct the distal bite and the correct formation of the dentoalveolar system.

[0007] Document US 2002192617 A1, published December 19, 2002, discloses treatment using removable elastic devices for repositioning teeth. Due to the nature of elastic devices, such components can take a wide variety of forms, from readily available traditional accessories to custom-designed devices. Likewise, the device can be modified to provide additional features for a specific orthodontic treatment. Document US11484390 B2, published November 1, 2022, discloses the production of aligners using 3D printing or additive manufacturing processes, imparting new geometries to the aligners for applying torque, rotation, and full 3D control to teeth in new ways. 3D-printed aligners can contain several different plastic or metal materials with varying orthodontic properties.

[0008] Disclosure of the essence of the invention

[0009] Modern aligner manufacturers recommend wearing the aligners for 1-2 weeks, with movement increments also occurring every 1-2 weeks. However, studies have shown that by the end of the seventh day of continuous wear, the aligners lose up to 50% of their shape and effectively fail to exert the necessary pressure to further move teeth.

[0010] At the same time, during the next stage, when using a new aligner with a step-by-step movement, the pressure on the teeth becomes significantly higher than necessary, as the previous aligner, due to its loss of shape, did not bring the teeth into the intended position. As a result, the patient experiences discomfort and / or pain. Excessive pressure can also lead to root resorption.

[0011] The claimed invention aims to solve this problem by using daily aligners, meaning the patient puts on a brand new aligner every morning and discards the old one. This ensures consistent pressure on the teeth every day, preventing the aligners from losing their shape, significantly increasing the effectiveness of treatment.

[0012] The technical result of the claimed method is to accelerate the treatment process, as well as to eliminate sudden changes in pressure on the teeth, which eliminates pain and discomfort for the client.

[0013] The technical result is achieved by implementing a method for aligning teeth using one-day aligners, which includes the following sequence of actions: taking a 3D image of the patient's teeth to record their initial position; determining the final final position after dental treatment using virtual planning; determining the trajectory of movement of at least one patient's tooth from its initial to final position; forming a staged treatment plan, wherein the duration of each stage is from one to five days and includes daily replacement of the aligner, and at each stage the aligners are replaced using aligners with a new shape for replacement, which ensures the displacement of each tooth, according to the following parameters: a) TIP (angulation) • incisors 0.0015 - 0.7 degrees

[0014] • fangs 0.0015 - 0.7 degrees

[0015] • premolars 0.001 - 0.9 degrees

[0016] • molars 0.001 - 0.9 degrees b) Rotation

[0017] • cutters 0.002 - 1.5 degrees

[0018] • fangs 0.002 - 1.2 degrees

[0019] • premolars 0.001 - 0.9 degrees

[0020] • molars 0.0015 - 0.7 degrees c) Torque

[0021] • cutters 0.001 - 0.9 degrees

[0022] • fangs 0.001 - 0.9 degrees

[0023] • premolars 0.001 - 0.9 degrees

[0024] • molars 0.0015 - 0.7 degrees d) Buccal - Lingual

[0025] • incisors 0.002 - 0.2 mm canines 0.001 - 0.175 mm

[0026] • premolars 0.001 - 0.175 mm

[0027] • molars 0.0011 - 0.15 mm d) Extrusion / intrusion

[0028] • cutters 0.001 - 0.2 mm

[0029] • fangs 0.0011 - 0.15 mm

[0030] • premolars 0.0011 - 0.15 mm

[0031] • molars 0.001 - 0.1 mm e) Mesial - Distal

[0032] • cutters 0.002 - 0.2 mm

[0033] • fangs 0.001 - 0.175 mm

[0034] • premolars 0.001 - 0.175 mm

[0035] • molars 0.0011 - 0.15 mm, while at the initial stage of treatment with progressive tooth movement, the pressure force of the aligner on the moving teeth is in the range of values: 0.49 N - 5 N, with a tilting movement of the tooth, the pressure force of the aligner on the moving teeth is in the range of values: 0.145 N - 3 N, and at subsequent stages of treatment with progressive tooth movement, the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 5 N, with a tilting movement of the tooth, the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 3 N, the force moment during rotation around the axis is in the range of values: 45 g * mm - 450 g * mm, after which a diagnosis of the treatment process is carried out, and if, according to the results of the diagnosis, the final position of at least one tooth is not achieved, then an adjustment of the treatment process is performed.

[0036] In specific cases of the method implementation, the diagnosis of the treatment process and control of the process of moving teeth to the required position are carried out using a test template.

[0037] The test template is an aligner made of at least two layers of polyurethane, or polyethylene terephthalate glycol, or polycarbonate, or polypropylene, or polyethylene, or polyethylene terephthalate, or copolymer, or biodegradable or compostable plant-based material, but 50% or more stiffer than daily aligners.

[0038] An aligner made of at least one layer of piezoresistive material is used as a test template, and the accuracy of tooth movement is determined by measuring the pressure / compression-stretching / curvature of the piezoresistive material of the template.

[0039] Brief description of the drawings

[0040] To explain the essence of the claimed method of teeth alignment using one-day aligners and to confirm its effectiveness, diagrams are provided.

[0041] Fig. 1 shows a graph showing the values ​​of pressure exerted on the patient's teeth over the course of a month with daily aligner replacement (blue line), with aligner replacement every 7 days (green line), and with aligner replacement every 14 days (orange line).

[0042] According to the presented graph, it is obvious that by changing aligners every day, maintaining constant, equal pressure on the teeth, and moving them every 3 days, treatment occurs faster and there are no sudden changes in pressure on the teeth.

[0043] Fig. 2 shows a graph showing the dependence of bacterial growth with daily replacement of aligners (blue line), with replacement of aligners once every 7 days (green line), and with replacement of aligners once every 14 days (orange line).

[0044] The claimed method for teeth alignment using daily aligners involves obtaining a 3D image of the patient's teeth to record their initial position and determining the final position of the patient's teeth using a tooth movement program. Once the final position of the patient's teeth is obtained, the trajectory of movement of the patient's teeth from their initial to final position is determined. A treatment plan is then developed, divided into stages, with each subsequent stage involving replacing the aligner with a new shape once a day, every two days, every three days, or every four days, but not less than once every five days, depending on the chosen treatment regimen.

[0045] The aligners are made in such a way that they provide the displacement of each tooth in accordance with the following values: a) TIP (angulation)

[0046] • cutters 0.0015 - 0.7 degrees

[0047] • fangs 0.0015 - 0.7 degrees

[0048] • premolars 0.001 - 0.9 degrees

[0049] • molars 0.001 - 0.9 degrees b) Rotation

[0050] • cutters 0.002 - 1.5 degrees

[0051] • fangs 0.002 - 1.2 degrees

[0052] • premolars 0.001 - 0.9 degrees

[0053] • molars 0.0015 - 0.7 degrees c) Torque

[0054] • cutters 0.001 - 0.9 degrees

[0055] • fangs 0.001 - 0.9 degrees

[0056] • premolars 0.001 - 0.1 degrees

[0057] • molars 0.0015 - 0.7 degrees d) Buccal - Lingual

[0058] • cutters 0.002 - 0.2 mm

[0059] • fangs 0.001 - 0.175 mm

[0060] • premolars 0.001 - 0.175 mm

[0061] • molars 0.0011 - 0.15 mm d) Extrusion / intrusion

[0062] • cutters 0.001 - 0.2 mm

[0063] • canines 0.0011 - 0.15 mm • premolars 0.0011 - 0.15 mm

[0064] • molars 0.001 - 0.1 mm e) Mesial - Distal

[0065] • cutters 0.002 - 0.2 mm

[0066] • fangs 0.001 - 0.175 mm

[0067] • premolars 0.001 - 0.175 mm

[0068] • molars 0.0011 - 0.15 mm,

[0069] In this case, the pressure on each tooth should be within the range of values:

[0070] - at the beginning of tooth movement during the treatment process, during progressive tooth movement, the pressure force of the aligner on the moving teeth is in the range of values: 0.49 N - 5 N;

[0071] - at the beginning of tooth movement during treatment during the tilting movement of the tooth, the pressure force of the aligner on the moving teeth is in the range of values: 0.145 N - 3 N;

[0072] - during subsequent progressive movement of the tooth (subsequent movement of the tooth after the start of movement), the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 5 N

[0073] - during subsequent tilting movement of the tooth (subsequent movement of the tooth after the start of movement), the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 3 N

[0074] - the torque during rotation around the axis is in the range of values: 45 g*mm - 450 g*mm

[0075] The company manufactures daily aligners worn for no more than 23 hours per day, replacing each aligner with a new one every day. Because the aligners are changed daily and maximum material effectiveness is only needed for the first 24 hours, it's possible to use more cost-effective, recyclable single-layer materials, such as polyurethane, polyethylene terephthalate glycol, polycarbonate, polypropylene, polyethylene, polyethylene terephthalate, copolymer, and / or environmentally safe, biodegradable, compostable, and / or plant-based materials (e.g., 100% bio-based materials). The use of three-layer / multilayer materials, which are used by most manufacturers worldwide and are more harmful to the planet, is completely eliminated.Applying a new, reshaped aligner sequentially every 24 hours, every 2 days, every 3 days, every 4 days, but no less than every 5 days, depending on the chosen treatment regimen. By using a new aligner every day, teeth are moved as frequently as necessary for effective treatment, no more than once a day and no less than once every 5 days. This means that the proposed method eliminates steps tied to the duration of aligner wear (1 week / 2 weeks), and the steps themselves are tied to the treatment outcome.

[0076] A new batch of aligners is delivered to the client once a month. The old batch is also collected for recycling.

[0077] Upon receiving a new batch, the patient independently evaluates the treatment progress using a test template, which is delivered with the new monthly batch of daily aligners. The test template is used to determine the effectiveness of the treatment.

[0078] The test template is:

[0079] 1. An aligner made of multiple layers of polyurethane, or polyethylene terephthalate glycol, or polycarbonate, or polypropylene, or polyethylene, or polyethylene terephthalate, or copolymer, or biodegradable or compostable plant-based material, but 50% or more rigid than daily aligners.

[0080] 2. An aligner with at least one layer made of piezoresistive material. To determine the accuracy of tooth movement, the deformation of the piezoresistive template is measured by measuring the pressure / compression / extension / curvature of the piezoresistive material.

[0081] The material can be applied as a continuous layer, with breaks, patterns / a specific shape, to the entire surface of the aligner or to parts of it by spraying, printing, 3D printing, transfer, stereolithography, using glue, during the thermoforming process in a separate layer, etc. By measuring the resistance of the aligner material layer in a free state and comparing it with the resistance measured after placing the aligner on the teeth, we obtain an estimate of the degree of stretching / curvature of this layer and, depending on the shape of the layer, we can evaluate the degree of compliance of the tooth position with the one being tested.

[0082] The piezoresistive material that can be used can be, for example, Velostat, Linqstat, PVDF or others.

[0083] If necessary, treatment adjustments are made. Adjustments are made dynamically during treatment—there's no need to redo subsequent treatment stages if any deviations arise. For example, by extending the current treatment stage without changing the movement for 1 to 7 days, monitoring the effectiveness of tooth movement with a test template, thereby bringing the teeth to the desired position and proceeding to the next stage, taking into account the shrinkage of the test template.

[0084] Or, correction is accomplished by incorporating one or more additional stages (microcorrections) before moving on to the planned next stage. This additional stage consists of a 3D scan, obtaining an initial data set (the client's current tooth position), and using the initial tooth position from the next stage as the final data set (the final tooth position) for the correction stage. Everything then proceeds as usual. This allows treatment to continue according to the original plan, while performing microcorrections.

[0085] If there is a slight deviation from the treatment plan, it may be recommended to continue treatment without changing the plan. Due to the gentler treatment process, correction occurs naturally when using subsequent aligners according to the original plan.

[0086] If necessary, after a repeat scan, adjustments are made to the entire subsequent treatment, ensuring that the next batch is delivered with the adjustments in mind. Not all aligners are printed at once; they are delivered in stages. This reduces the number of unusable aligners when adjustments are needed.

[0087] Also, during the study, it was found that when using daily aligners, it is very effective to make more frequent steps (once every 4 days, once every 3 days, once every 2 days, every day) with a decrease in step size, rather than with a weekly (two-weekly) step.

[0088] Clinical examples:

[0089] This study involved two groups:

[0090] Group A - 10 people. Treatment method: aligner replacement period every 14 days and with a predetermined movement interval every 14 days.

[0091] Group B - 10 people. Treatment method: daily aligners with a daily aligner replacement period and a predetermined movement interval of every 3 days.

[0092] The groups were selected with the most similar diagnoses and data, men and women in half, aged 25-35 years.

[0093] The treatment was carried out by two orthodontists in two different ways: 1. With a period of replacing aligners once every 14 days and a step of movements once every 14 days;

[0094] 2. With a period of replacing the aligner every day and a movement step every 3 days.

[0095] All diagnoses were made based on a comprehensive analysis of diagnostic data: photographs of teeth and face, 3D cephalometry (computer tomography, TRG in lateral projection), intraoral scanning, and anthropometry calculation.

[0096] Let us consider three clinical examples of groups A and B:

[0097] Example 1

[0098] Patient: 27-year-old male from group A

[0099] Diagnosis:

[0100] Along the sagittal plane:

[0101] Angle's Class 2 for canines and molars on the right

[0102] Along the transversal plane:

[0103] Transversal incisor occlusion (displacement of the central line of the lower jaw to the right by 0.8 mm)

[0104] Along the vertical plane:

[0105] Horizontal growth type

[0106] Narrowing of the upper and lower jaws

[0107] Crowded position in the frontal area of ​​the upper and lower dental arches, space deficit of 2.0 mm

[0108] Retrusion of the upper incisors by 7 degrees

[0109] Protrusion of the lower incisors by 7° degrees

[0110] Main treatment:

[0111] HF - 38 steps. Treatment time: 19 months.

[0112] The maximum step of tooth movement between stages is 0.3 mm and the maximum degree of movement between stages is 2.1 degrees

[0113] Low frequency - 38 steps. Treatment time: 19 months.

[0114] The maximum tooth movement step between stages is 0.28 mm and the maximum degree of movement between stages is 1.6 degrees

[0115] The movements that were laid down:

[0116] Upper jaw:

[0117] • Torque expansion in the lateral sections

[0118] 1 segment: premolars - 1 mm, molars - 2 mm

[0119] 2 segment: premolars - 1 mm, molars - 2 mm

[0120] Sequential distalization of 1 segment without the use of a mini-screw • Elimination of tooth rotations

[0121] • Increased frontal torque + 1mm retraction (round tripping)

[0122] • Intrusion of the frontal section by 2 mm

[0123] Lower jaw:

[0124] • Torque expansion of 3, 4 segments - 2.3 mm

[0125] • Shift of the center by 0.8 mm to the left during elimination of crowding and round tripping + IPR (0.2-0.3 mm)

[0126] All aligners were used in the primary treatment; correction was initiated due to a Class 1 Angle defect on the right. A mini-screw needed to be placed in one segment for support and to practice distalization movements.

[0127] Correction #1:

[0128] HF - 14 steps. Treatment time: 7 months.

[0129] The maximum step of tooth movement between stages is 0.25 mm and the maximum degree of movement between stages is 2 degrees

[0130] LF - 14 steps. Treatment time: 7 months.

[0131] The maximum step of tooth movement between stages is 0.3 mm and the maximum degree of movement between stages is 1.9 degrees

[0132] Total treatment time: 26 months

[0133] Discomfort and periodically occurring pain in the area of ​​the front teeth of the upper and lower jaws when changing aligners within four days of wearing them during the entire treatment period.

[0134] Patient: 27-year-old woman from group B

[0135] Diagnosis:

[0136] Along the sagittal plane:

[0137] Angle's Class 2 for canines and molars

[0138] Along the transversal plane:

[0139] Transversal incisor occlusion (displacement of the central line of the lower jaw to the left by 0.6 mm)

[0140] Along the vertical plane:

[0141] Horizontal growth type

[0142] Deep incisor occlusion

[0143] Narrowing of the upper and lower jaws

[0144] Crowded position in the frontal area of ​​the upper and lower dental arches, space deficit of 1.3 mm

[0145] Retrusion of the upper incisors 5° degrees Main treatment:

[0146] HF - 139 steps. Treatment time: 14 months.

[0147] The maximum step of tooth movement between stages is 0.12 mm and the maximum degree of movement between stages is 0.7 degrees

[0148] Low frequency - 139 steps. Treatment time: 14 months.

[0149] The maximum step of tooth movement between stages is 0.1 mm and the maximum degree of movement between stages is 0.77 degrees

[0150] The movements that were laid down:

[0151] Upper jaw:

[0152] • Torque expansion in the lateral sections

[0153] 1 segment: premolars - 0.8 mm, molars - 2 mm

[0154] 2 segment: premolars - 0.8 mm, molars - 2 mm

[0155] • Sequential distalization of 1 segment without the use of a mini-screw

[0156] • increase in frontal torque + 0.8 mm retraction (round tripping)

[0157] • Intrusion of the frontal section by 2.3 mm

[0158] Lower jaw:

[0159] • Torque expansion in the lateral sections of segments 3 and 4 - 2.0 mm

[0160] • shift of the center by 0.6 mm to the right during elimination of crowding and round tripping + IPR (0.15-0.3 mm)

[0161] Treatment completed without correction.

[0162] There was no discomfort or pain during the entire treatment.

[0163] Example 2

[0164] Patient: Female, 25 years old, Group A

[0165] Diagnosis:

[0166] Along the transversal plane:

[0167] Transversal incisor occlusion (displacement of the central line of the upper jaw to the right by 0.6 mm)

[0168] Along the vertical plane:

[0169] Deep incisor occlusion

[0170] Narrowing of the upper and lower dental arches

[0171] Crowded position in the frontal area of ​​the upper and lower dental arches, space deficit of 2.5 mm

[0172] Retrusion of the upper incisors by 4 degrees

[0173] Primary treatment: HF - 22 steps. Treatment duration: 11 months.

[0174] The maximum tooth movement step between stages is 0.31 mm and the maximum degree of movement between stages is 2.6 degrees

[0175] LF - 22 steps. Treatment time: 11 months.

[0176] The maximum step of tooth movement between stages is 0.29 mm and the maximum degree of movement between stages is 1.1 degrees

[0177] The movements that were laid down:

[0178] HF:

[0179] • Torque expansion of 1 and 2 segments 3mm

[0180] • Positive torque of the frontal crowns + 1.5 mm intrusion

[0181] • Shift of the center by 0.6 mm to the left during the elimination of crowding and round tripping + IPR (0.2-0.3 mm)

[0182] LF:

[0183] • Torque expansion of 3 and 4 segments 2.8 mm

[0184] • Intrusion of the frontal incisors - 2.0 mm

[0185] All aligners were used in the main treatment; correction was neglected due to loose contacts in the lateral sections (lateral disocclusion) and insufficient intrusion of the upper and lower incisors.

[0186] Correction No. 1

[0187] HF - 14 steps. Treatment time: 7 months

[0188] The maximum step of tooth movement between stages is 0.3 mm and the maximum degree of movement between stages is 1.6 degrees

[0189] LF - 14 steps. Treatment time: 7 months

[0190] The maximum step of tooth movement between stages is 0.1 mm and the maximum degree of movement between stages is 0.44 degrees

[0191] All aligners from correction No. 1 have been removed; correction has been initiated due to insufficient intrusion of the anterior part of the upper jaw.

[0192] Correction No. 2

[0193] HF - 6 steps. Treatment time: 3 months

[0194] Low frequency - 6 steps. Treatment time: 3 months

[0195] Total treatment time is 21 months

[0196] Discomfort, pain and constant headache at the initial stages of the main treatment and at the beginning of the 1st stage of correction

[0197] Patient: Male, 29 years old, group B

[0198] Diagnosis: According to the transverse plane:

[0199] Transversal incisor occlusion (displacement of the central line of the upper jaw to the left by 0.5 mm)

[0200] Along the vertical plane:

[0201] Deep incisor occlusion

[0202] Narrowing of the upper and lower dental arches

[0203] Crowded position of the frontal section of the upper and lower dental arches, space deficit of 3 mm

[0204] Retrusion of the upper incisors by 7 degrees

[0205] Main treatment:

[0206] HF - 95 steps. Treatment time: 10 months.

[0207] The maximum step of tooth movement between stages is 0.13 mm and the maximum degree of movement between stages is 0.8 degrees

[0208] Low frequency - 95 steps. Treatment time: 10 months.

[0209] The maximum step of tooth movement between stages is 0.12 mm and the maximum degree of movement between stages is 0.5 degrees

[0210] The movements that were laid down:

[0211] HF:

[0212] • Torque expansion of 1 and 2 segments 2.8 mm

[0213] • Positive torque of the anterior crowns + 2.0 mm intrusion

[0214] • Shifting the center by 0.5 mm to the right during crowding and round tripping + IPR (0.1 mm)

[0215] LF:

[0216] • Torque expansion of 3 and 4 segments 2.4 mm

[0217] • Intrusion of the frontal incisors - 2.0 mm

[0218] Dynamic correction was applied during the treatment process at stages 34 and 78 by extending the treatment process by 5 and 7 days, respectively.

[0219] There was no discomfort, headache or pain when changing the trays throughout the entire treatment period.

[0220] Example 3

[0221] Male, 30 years old, group A

[0222] Diagnosis:

[0223] Along the vertical plane:

[0224] Deep incisor disocclusion

[0225] Narrowing of the upper and lower dental arches Rotation of teeth

[0226] Crowded position of the teeth of the upper and lower dental arches, space deficit of 2.0 mm.

[0227] Main treatment:

[0228] HF - 20 steps. Treatment time: 10 months.

[0229] The maximum step of movement between stages is 0.22 mm and the maximum degree of movement between stages is 1.5 degrees

[0230] Low frequency - 20 steps. Treatment time: 10 months.

[0231] The maximum step of movement between stages is 0.24 mm and the maximum degree of movement between stages is 2.3 degrees.

[0232] The movements that were laid down:

[0233] HF:

[0234] • Torque expansion of segments 1 and 2 - 2 mm

[0235] • Increased frontal torque + 1.0 mm intrusion

[0236] • Elimination of rotations and improvement of angulation of teeth 1.1, 2.1

[0237] • IPR (0.15 mm)

[0238] LF:

[0239] • Torque expansion of segments 3 and 4 - 1 mm

[0240] • Increased frontal torque + 1.0 mm intrusion

[0241] • IPR (0.2 mm)

[0242] All aligners from the main treatment have been removed, and correction has been initiated due to the aligner not fitting properly on the lower jaw due to insufficient intrusion and rotational work, which was discovered at the last stage.

[0243] Correction #1:

[0244] HF - 14 steps. Treatment time: 7 months.

[0245] The maximum step of tooth movement between stages is 0.28 mm and the maximum degree of movement between stages is 0.98 degrees

[0246] NC - 14 steps. Treatment time: 7 months.

[0247] The maximum step of tooth movement between stages is 0.12 mm and the maximum degree of movement between stages is 2.3 degrees

[0248] Total treatment time is 17 months

[0249] Discomfort and pain during the first three days after using the new aligner during the main treatment. The patient took painkillers during this time.

[0250] Male, 34 years old, group B Diagnosis:

[0251] Along the vertical plane:

[0252] Deep incisor disocclusion

[0253] Narrowing of the upper and lower dental arches

[0254] Rotation of teeth

[0255] Crowded position of the teeth of the upper and lower dental arches, space deficit of 1.8 mm. Basic treatment:

[0256] HF - 74 steps. Treatment time: 8 months.

[0257] The maximum step of tooth movement between stages is 0.12 mm and the maximum degree of movement between stages is 0.5 degrees

[0258] Low frequency - 74 steps. Treatment time: 8 months.

[0259] The maximum tooth movement step between stages is 0.11 mm and the maximum degree of movement between stages is 0.8 degrees)

[0260] The movements that were laid down:

[0261] HF:

[0262] • Torque expansion of segments 1 and 2 - 2 mm

[0263] • Increased frontal torque + 1.0 mm intrusion

[0264] • Elimination of tooth rotations

[0265] • IPR (0.1 mm)

[0266] LF:

[0267] • Torque expansion 3 and 4 segments - 1.0 mm

[0268] • Increased frontal torque + 1.0 mm intrusion

[0269] • IPR (0.15 mm)

[0270] Treatment completed without correction.

[0271] The patient did not complain of discomfort or pain.

[0272] Conclusions: Based on the above data, as well as a comparison of other participants in Groups A and B, patients in Group B successfully completed their treatment on average twice as fast as patients in Group A, taking into account the correction. Patients in Group B completed the treatment without side effects such as toothache, headache, or discomfort.

[0273] The conclusion was made based on the analysis of all diagnostic data, which were also used before the start of treatment, as well as the subjective sensations of patients.

Claims

Invention formula 1. A method for aligning teeth using one-day aligners, comprising the following sequence of actions: taking a 3D image of the patient's teeth to record their initial position; determining the final position after dental treatment using virtual planning; determining the trajectory of movement of at least one patient's tooth from its initial to final position; creating a step-by-step treatment plan, characterized in that the duration of each step is from one to five days and includes daily replacement of the aligner, and at each step, the aligners are replaced using aligners with a new shape that ensures the displacement of each tooth, according to the following parameters: a) TIP (angulation) • cutters 0.0015 - 0.7 degrees • fangs 0.0015 - 0.7 degrees • premolars 0.001 - 0.9 degrees • molars 0.001 - 0.9 degrees b) Rotation • cutters 0.002 - 1.5 degrees • fangs 0.002 - 1.2 degrees • premolars 0.001 - 0.9 degrees • molars 0.0015 - 0.7 degrees c) Torque • cutters 0.001 - 0.9 degrees • fangs 0.001 - 0.9 degrees • premolars 0.001 - 0.9 degrees • molars 0.0015 - 0.7 degrees d) Buccal - Lingual • cutters 0.002 - 0.2 mm • fangs 0.001 - 0.175 mm • premolars 0.001 - 0.175 mm • molars 0.0011 - 0.15 mm d) Extrusion / intrusion • cutters 0.001 - 0.2 mm • fangs 0.0011 - 0.15 mm • premolars 0.0011 - 0.15 mm • molars 0.001 - 0.1 mm e) Mesial - Distal • cutters 0.002 - 0.2 mm • fangs 0.001 - 0.175 mm • premolars 0.001 - 0.175 mm • molars 0.0011 - 0.15 mm, while at the initial stage of treatment with progressive tooth movement, the pressure force of the aligner on the moving teeth is in the range of values: 0.49 N - 5 N, with a tilting movement of the tooth, the pressure force of the aligner on the moving teeth is in the range of values: 0.145 N - 3 N, and at subsequent stages of treatment with progressive tooth movement, the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 5 N, with a tilting movement of the tooth, the pressure force of the aligner on the moving teeth is in the range of values: 0.01 N - 3 N, the force moment during rotation around the axis is in the range of values: 45 g * mm - 450 g * mm, after which a diagnosis of the treatment process is carried out, and if, according to the results of the diagnosis, the final position of at least one tooth is not achieved, then an adjustment of the treatment process is performed.

2. The method of teeth alignment according to I.1, characterized in that the diagnosis of the treatment process and control of the process of movement of teeth to the required position are carried out using a test template.

3. The method for aligning teeth according to paragraph 2, characterized in that an aligner consisting of at least two layers of polyurethane, or polyethylene terephthalate glycol, or polycarbonate, or polypropylene, or polyethylene, or polyethylene terephthalate, or copolymer, or biodegradable or compostable material of plant origin, but 50% or more rigid than one-day aligners, is used as a test template.

4. The method for aligning teeth according to paragraph 2, characterized in that an aligner made of at least one layer of piezoresistive material is used as a test template, whereby the accuracy of tooth movement is determined by measuring the pressure / compression-extension / curvature of the piezoresistive material of the template.

Images