CN115300136A - Over-correction specifying method - Google Patents
Over-correction specifying method Download PDFInfo
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- CN115300136A CN115300136A CN202210702213.3A CN202210702213A CN115300136A CN 115300136 A CN115300136 A CN 115300136A CN 202210702213 A CN202210702213 A CN 202210702213A CN 115300136 A CN115300136 A CN 115300136A
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- 238000012937 correction Methods 0.000 title claims abstract description 88
- 238000000034 method Methods 0.000 title claims abstract description 40
- 230000008859 change Effects 0.000 claims abstract description 7
- 210000003781 tooth socket Anatomy 0.000 claims abstract description 7
- 210000000988 bone and bone Anatomy 0.000 claims description 14
- 210000004283 incisor Anatomy 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 7
- 210000002379 periodontal ligament Anatomy 0.000 claims description 6
- 238000013519 translation Methods 0.000 claims description 6
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 238000013461 design Methods 0.000 claims description 4
- 210000004763 bicuspid Anatomy 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000011156 evaluation Methods 0.000 claims description 3
- 210000002997 osteoclast Anatomy 0.000 claims description 3
- 230000035755 proliferation Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 230000011164 ossification Effects 0.000 claims description 2
- 241000282465 Canis Species 0.000 claims 2
- 230000000694 effects Effects 0.000 abstract description 6
- 210000003464 cuspid Anatomy 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 206010020718 hyperplasia Diseases 0.000 description 2
- 238000011002 quantification Methods 0.000 description 2
- 208000006386 Bone Resorption Diseases 0.000 description 1
- 230000005483 Hooke's law Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000024279 bone resorption Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 210000000963 osteoblast Anatomy 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/002—Orthodontic computer assisted systems
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C7/00—Orthodontics, i.e. obtaining or maintaining the desired position of teeth, e.g. by straightening, evening, regulating, separating, or by correcting malocclusions
- A61C7/002—Orthodontic computer assisted systems
- A61C2007/004—Automatic construction of a set of axes for a tooth or a plurality of teeth
Abstract
The invention belongs to the technical field of tooth correction, and discloses an over-correction specifying method, which determines over-correction information by comprehensively evaluating clinical and mechanical data of a patient in the following way, provides detailed data reference for doctors, and makes a proper over-correction scheme, and mainly comprises the following steps: s1, generating resistance F when the tooth socket moves the teeth according to basic information of a patient N The change of (d) is related to time and is drawn into a graph for reference; s2, calculating appropriate correction force according to the specific condition of each patient; and S3, measuring, calculating and recording the efficacy of the appliance when each tooth moves. According to the invention, according to the actual conditions of different patients, the targeted correction schemes suitable for different patients are measured and calculated by analyzing S1-S5 one by one, so that personalized customization is realized, the correction effect is improved, the treatment confidence of the patients is enhanced, the matching intention of the patients is further improved, and the correction period is shortened.
Description
Technical Field
The invention belongs to the technical field of tooth correction, and particularly relates to an over-correction specifying method.
Background
Along with the improvement of living standard, the attention of people to oral hygiene is gradually improved, particularly, the tooth growth deformity and the occlusion abnormality become one of key attention objects, so that the oral tooth correction technology is developed greatly, wherein the bracket-free invisible correction technology is generally accepted by doctors, and the invisible corrector has the characteristics of convenience in taking and wearing, easiness in clinical use, convenience for cleaning oral hygiene and the like, so that the bracket-free invisible correction technology is more and more popular; however, in the treatment process, the orthodontic period of the patients is greatly different, namely half a year in short and 3 to 4 years in long, due to the influence of factors such as physical conditions of the patients, the degree of tooth deformity, clinical treatment means, orthodontic treatment schemes and the like.
In addition, the prior art for correcting has the following defects:
firstly, due to the functional principle of the appliance, the tooth moving efficiency of each pair of appliances cannot reach 100%:
physical principles of tooth movement: FT > FN
Estimate from hooke's law: FT = kx
Wherein: k represents an elastic coefficient, and x represents a deformation amount
Then, it can be known that: it is necessary that x > FN/k for the tooth to move
When the single step corrects the residual amount "FN/k", FT = FN, the tooth can not move continuously
Namely, the efficacy of the appliance: η = (L-FN/k)/L = m% <100%
The invisible appliance principle determines that the single-step efficiency cannot reach 100%;
second, appliance materials and oral environment; the appliance material may experience stress relaxation in the oral environment due to prolonged exposure to tension:
the elastic force is lost along with the increase of wearing time, and the loss amount is set as follows: Δ F
Assuming that the elastic coefficient k is constant, the appliance loss due to stress relaxation is separately reported as: Δ F
The comprehensive correcting force can be known as follows: f = FT- Δ F = FN, the tooth can not move any more
The efficiency of the appliance is as follows: eta = [ L- (FN + DeltaF)/k ]/L = (m-Deltam)% <100%
The material stress relaxation phenomenon causes the single-step performance of the appliance to be reduced;
third, error accumulation:
due to the influence of factors such as the correction principle, the correction device material, the oral environment, the scheme and the patient matching degree, errors occurring in each step in the correction process of the patient can be gradually accumulated along with the correction, and when the errors are accumulated to a certain degree, the efficiency of the correction device can be reduced, and even the risk of sleeve detachment can occur;
even if the elastic coefficient k is not changed, the loss of the appliance due to stress relaxation is separately recorded as: f delta, the first step and the second step are respectively recorded as: f Δ 1, F Δ 2;
in the second step of correction, the total clinical deformation of the appliance is as follows: l + (FN + Δ F1)/k. When the initial correction force FT2> FT1, the stress relaxation property indicates that: f Δ 2> Δ F1;
namely, the efficiency of the appliance in the second step: η = [ L + (FN + Δ F1)/k- (FN + Δ F2)/k ]/[ L + (FN + Δ F1)/k ] = (n- Δ n)% <100%;
it is also known that: (FN + DeltaF 2)/k > (FN + DeltaF 1)/k, or (FN + DeltaFn)/k > (FN + DeltaFn-1)/k
So that when (FN + delta Fn)/k is large enough, the appliance cannot be worn, and the sleeve is removed;
therefore, it is necessary to design a method for adding over correction to solve the problem of insufficient correction efficiency and shorten the correction period.
Disclosure of Invention
The present invention is directed to an over-correction specifying method to solve the above problems in the prior art.
In order to achieve the above purpose, the invention provides the following technical scheme: an over-correction specifying method determines over-correction information by comprehensively evaluating clinical and mechanical data of a patient in the following ways, provides detailed data reference for doctors and makes a proper over-correction scheme, and mainly comprises the following steps of:
s1, generating resistance F when the tooth socket moves the teeth according to basic information of a patient N The change of (d) is related to time and is drawn into a graph for reference;
s2, calculating appropriate correction force according to the specific condition of each patient;
s3, measuring, calculating and recording the effectiveness of the appliance when each tooth moves;
s4, calculating and determining the adding time of the overcorrection amount;
s5, analyzing and recording the optimal single-step moving distance of the teeth at each tooth position;
and S6, analyzing the five points one by one, determining the targeted correction parameters of each patient, and adding proper over-correction into the design scheme of the patient.
Preferably, the variation of the resistance applied to the teeth during the movement in step S1 includes three stages, which are:
stage (1): with the upper tooth socket, the periodontal ligament begins to deform, tension stress or compression stress does not form tension or pressure on the alveolar bone, and a hyperplasia or absorption signal is not sent out at the moment;
stage (2): the tooth movement is resisted by the periodontal ligament and the alveolar bone together, and the resistance value is increased sharply at the moment;
stage (3): osteogenesis or osteoclast formation, alveolar bone proliferation or resorption, and root pressure with gradual decrease in resistance.
Preferably, the method for calculating and analyzing the optimal correction force in step S2 is as follows:
(1) the method comprises the following steps FT > Fmin: the elasticity formed by the appliance is required to be larger than the minimum correction force so as to enable the teeth to effectively move, namely, the biological reconstruction displacement occurs; while shift bounce needs to be avoided.
(2) The method comprises the following steps FT < Fmax: the appliance must be less than the maximum force to provide elasticity or else transparency changes occur, resulting in indirect bone resorption of the alveolar bone.
(3) The method comprises the following steps Ffit: when the correction force is proper, the correction process can be ensured to be carried out stably and orderly; reflecting the efficacy of the prepared appliance, so that a doctor or a designer can add proper overcorrection to enable the correction result of the patient to be closer to the target position.
Preferably, there are actually two schemes for adding overcorrection in step S4, which are:
the first scheme comprises the following steps: separately adding compensation tolerance overcorrection in each step;
scheme II: overcorrection is added after the determination of the target bit is involved.
Preferably, the efficacy of the mobile appliance in the step S3 is quantified by adopting a mobile mode of different tooth positions after the appliance is added.
Preferably, the dental site comprises upper central incisors, upper lateral incisors, lower incisors, upper cuspids, lower cuspids, premolars, and posterior molars, and the movement comprises mesial-distal translation, bucco-lingual translation, mesial-distal root control, bucco-lingual root control, extension movement, depression movement, tilt movement, and rotation movement.
Preferably, different movement patterns for different tooth positions are determined and the percentage of movement is recorded.
Preferably, the optimal single-step moving distance of each tooth position is measured and recorded in step S5, and the measurement unit is mm.
The invention has the following beneficial effects:
1. according to the invention, according to the actual conditions of different patients, the targeted correction schemes suitable for different patients are measured and calculated by analyzing S1-S5 one by one, so that personalized customization is realized, the correction effect is improved, the correction attraction of the patients needing to be corrected is improved, the matching treatment intention of the patients is improved, the correction effect is improved, and the correction period is shortened.
2. And the specific conditions of different patients can be analyzed to provide correction clinical data, and after comprehensive evaluation, effective reference can be provided for the clinical operation of doctors, so that the rapid development of the dental correction industry is promoted, and the rapid promotion of the overall correction technology of the dental correction industry is promoted.
Drawings
FIG. 1 is a schematic view of the orthodontic force during orthodontic treatment;
FIG. 2 is a diagram illustrating quantification of orthodontic efficacy;
FIG. 3 is a schematic view of stress changes during correction of the appliance;
FIG. 4 is a diagram illustrating quantification of elastic force loss during correction of the appliance;
FIG. 5 is a schematic view of error accumulation during correction period;
FIG. 6 is a schematic representation of the resistance change as the appliance of the present invention moves the teeth;
FIG. 7 is a table of the present invention showing the effectiveness of the present invention in correcting teeth at different tooth positions;
FIG. 8 is a schematic diagram of the present invention with over-correction timing added during correction;
FIG. 9 is a one-step tooth movement scale for different tooth positions during correction according to the present invention.
In the figure: FN: resistance force; FT: correcting force; k: the elastic coefficient; x: the amount of deformation; l: single step correcting distance; eta: appliance efficacy; Δ F: an elastic force; m, n: potency values.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 9, the embodiment of the present invention provides an over-correction specifying method, which determines over-correction information by comprehensive evaluation of clinical and mechanical data of a patient, provides detailed data reference for a doctor, and specifies an appropriate over-correction scheme, and mainly comprises the following steps:
s1, generating resistance F when the tooth socket moves the teeth according to basic information of a patient N The change of (c) is in relation to time and is drawn into a graph for reference;
by analyzing the actual conditions of different patients, the method not only can provide analysis data for medical staff to formulate a targeted correction scheme suitable for the patients, but also provides reference clinical experimental data for later correction treatment;
s2, calculating appropriate correction force according to the specific condition of each patient;
the proper correction force is calculated, so that the correction effect can be improved to achieve the expected correction purpose, and the situation that teeth are loosened due to over correction is avoided;
s3, measuring, calculating and recording the effectiveness of the appliance when each tooth moves;
s4, calculating and determining the adding time of the overcorrection amount;
s5, analyzing and recording the optimal single-step moving distance of the teeth at each tooth position;
s6, analyzing the five points one by one, determining the targeted correction parameters of each patient, and adding proper over-correction into the design scheme of the patient;
the analysis is carried out according to the condition of the patient, and the data in the S1-S5 are recorded and analyzed, so that medical staff can conveniently make a correction scheme suitable for the patient, a whole set of complete clinical data is provided for later correction analysis, and the method can be used for training and learning in the dental correction industry.
As shown in fig. 6, the variation of the resistance applied to the teeth during moving in step S1 includes three stages:
stage (1): with the upper tooth socket, the periodontal ligament begins to deform, tension stress or compression stress does not form tension or pressure on the alveolar bone, and a hyperplasia or absorption signal is not sent out at the moment;
stage (2): the tooth movement is resisted by the periodontal ligament and the alveolar bone together, and the resistance value is increased sharply;
stage (3): forming osteoblasts or osteoclasts, wherein alveolar bones begin to proliferate or absorb, and the root pressure begins to generate biological reconstruction displacement, wherein the resistance value is gradually reduced;
through analyzing the three stages of the change of the resistance received by the teeth when moving respectively, medical personnel can further calculate and calculate the correction scheme which is more accordant with the actual condition of a patient, and can carry out targeted correction according to the three stages, so that the correction force of different stages in the correction scheme is more accordant with the resistance in the actual correction period, the tooth position is promoted to move in an expected manner under the matching of the correction force and the actual resistance, and the correction effect which is more accordant with the expectation is achieved.
As shown in fig. 7, the method for calculating and analyzing the optimal orthodontic force in step S2 is as follows:
(1) the method comprises the following steps When FT > Fmin: the elasticity formed by the appliance is required to be larger than the minimum correction force so as to enable the teeth to effectively move, namely, the biological reconstruction displacement occurs; while shift bounce needs to be avoided.
(2) The method comprises the following steps When FT < Fmax: the elasticity formed by the appliance is required to be less than the maximum correction force, otherwise, the transparent deformation can occur, and the alveolar bone is subjected to indirect bone absorption; therefore, the reconstruction speed of effective organisms is low, the pain of patients is increased, the correction effect is reduced, and even the situation that teeth are loosened and fall off is caused.
(3) The method comprises the following steps Ffit: when the correction force is proper, the correction process can be ensured to be carried out stably and orderly; reflecting the efficacy of the prepared appliance, so that a doctor or a designer can add proper overcorrection to enable the correction result of the patient to be closer to the target position.
As shown in fig. 8, there are actually two schemes for adding overcorrection in step S4, which are respectively:
the first scheme is as follows: separately adding compensation tolerance overcorrection in each step;
scheme II: overcorrection is added after the determination of the target bit is involved.
As shown in fig. 7, the performance of the mobile appliance in step S3 is quantified by using the mobile manner of different tooth positions after adding the appliance.
As shown in fig. 7, the dental site includes upper central incisors, upper lateral incisors, lower incisors, upper cuspids, lower cuspids, premolars, and posterior molars, and the movement includes mesial-distal translation, bucco-lingual translation, mesial-distal root control, bucco-lingual root control, extension movement, depression movement, tilt movement, and rotation movement.
As shown in fig. 7, different movement patterns for different tooth positions were determined and the percentage of movement was recorded.
As shown in fig. 9, the optimal single-step moving distance of each tooth position is measured and recorded in mm in step S5.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An overcorrection assigning method, comprising: through comprehensive evaluation of clinical and mechanical data of a patient, overcorrection information is determined in the following mode, detailed data reference is provided for doctors, and a proper overcorrection scheme is formulated, and the method mainly comprises the following steps:
s1, generating resistance F when the tooth socket moves the teeth according to basic information of a patient N The change of (d) is related to time and is drawn into a graph for reference;
s2, calculating appropriate correction force according to the specific condition of each patient;
s3, measuring, calculating and recording the effectiveness of the appliance when each tooth moves;
s4, calculating and determining the adding time of the overcorrection amount;
s5, analyzing and recording the optimal single-step moving distance of the teeth at each tooth position;
and S6, analyzing the five points one by one, determining the targeted correction parameters of each patient, and adding proper over-correction to the design scheme of the patient.
2. The overcorrection assigning method according to claim 1, wherein: the change of the resistance borne by the teeth in the step S1 during the movement comprises three stages which are respectively as follows:
stage (1): the periodontal ligament begins to deform when the tooth socket is provided, tension stress or compression stress does not form tensile force or pressure on the alveolar bone, and a proliferation or absorption signal is not sent out at the moment;
stage (2): the tooth movement is resisted by the periodontal ligament and the alveolar bone together, and the resistance value is increased sharply;
stage (3): osteogenesis or osteoclast formation, alveolar bone proliferation or resorption, and root pressure with gradual decrease in resistance.
3. The overcorrection assignment method of claim 1, wherein: the method for calculating and analyzing the optimal correction force in the step S2 is as follows:
(1) the method comprises the following steps FT > Fmin: the elasticity formed by the appliance is required to be larger than the minimum appliance force, so that the teeth can effectively move, namely, biological reconstruction displacement occurs; meanwhile, displacement rebound needs to be avoided;
(2) the method comprises the following steps FT < Fmax: the elasticity formed by the appliance is required to be less than the maximum correction force, otherwise, the transparency deformation can occur, and the alveolar bone is subjected to indirect bone absorption;
(3) the method comprises the following steps Ffit: when the correction force is proper, the correction process can be ensured to be carried out stably and orderly; reflecting the efficacy of the prepared appliance, so that a doctor or a designer can add proper overcorrection to enable the correction result of the patient to be closer to the target position.
4. The overcorrection assigning method according to claim 1, wherein: in the step S4, there are two schemes for adding overcorrection, which are respectively:
the first scheme is as follows: separately adding error compensation "overcorrection" in each step;
scheme II: overcorrection is added after the determination of the target bit is involved.
5. The overcorrection assigning method according to claim 1, wherein: and in the step S3, the efficiency of the movable appliance is quantified by adopting a moving mode of different tooth positions after the appliance is added.
6. The overcorrection assigning method according to claim 5, wherein: the tooth positions comprise upper middle incisors, upper lateral incisors, lower incisors, upper canines, lower canines, premolars and posterior molars, and the moving modes comprise proximal-distal translation, buccal-lingual translation, proximal-distal root control, buccal-lingual root control, extension movement, depression movement, inclination movement and rotation movement.
7. The overcorrection assigning method according to claim 6, wherein: different movement patterns for different tooth positions are determined and the percentage of movement completion is recorded.
8. The overcorrection assignment method of claim 6, wherein: in the step S5, the optimal single-step moving distance of the teeth at each tooth position is measured and recorded, and mm is taken as a measurement unit.
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- 2022-06-21 CN CN202210702213.3A patent/CN115300136A/en active Pending
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| US20160242870A1 (en) * | 2015-02-23 | 2016-08-25 | Align Technology, Inc. | Method to manufacture aligner by modifying tooth position |
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