CN112842580A - Control method of orthodontic arch expanding device capable of accurately applying force - Google Patents
Control method of orthodontic arch expanding device capable of accurately applying force Download PDFInfo
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- CN112842580A CN112842580A CN202110061412.6A CN202110061412A CN112842580A CN 112842580 A CN112842580 A CN 112842580A CN 202110061412 A CN202110061412 A CN 202110061412A CN 112842580 A CN112842580 A CN 112842580A
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- driving motor
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- orthodontic arch
- expanding device
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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
- A61C7/08—Mouthpiece-type retainers or positioners, e.g. for both the lower and upper arch
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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
- A61C7/10—Devices having means to apply outwardly directed force, e.g. expanders
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
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- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
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- General Health & Medical Sciences (AREA)
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- Veterinary Medicine (AREA)
- Engineering & Computer Science (AREA)
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- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
Abstract
The invention relates to a control method of an orthodontic arch expanding device capable of accurately applying force, which solves the technical problem that the existing arch expanding device cannot accurately control the size of the arch expanding force, and uses the orthodontic arch expanding device which is provided with a driving motor, a motor bracket, a guide rod, a driving screw rod, a sliding block and a controller; the driving motor is arranged in the center of the motor bracket, and the guide rods are arranged on two sides of the motor bracket and are vertical to the motor bracket; the driving screw is connected with the driving motor and is parallel to the guide rod; the sliding block is parallel to the motor bracket and is driven by the driving screw rod, and the sliding block can slide along the guide rod; the invention sets the driving force according to the required expansion force; the bow expanding displacement can be controlled by setting the revolution of the driving motor according to the required bow expanding displacement. The invention can be used in the field of orthodontics.
Description
Technical Field
The invention relates to a control method of an orthodontic device, in particular to a control method of an orthodontic arch expanding device capable of accurately applying force.
Background
In real life, many people have crowded tooth arrangement, which not only seriously affects the beauty of teeth, but also may cause dysfunction of masticatory muscles and mandibular joints. Such patients often require an arch expansion treatment. The screw arch expander is an orthodontic auxiliary device for expanding upper and lower dental arches or moving local bone blocks and teeth in orthodontic clinical treatment, and has the correcting principle that an arch expanding spiral spring is placed at a proper position, the arch expander is opened through rotating a spiral hole, and the arch expanding force is transmitted to teeth and alveolar bones so as to expand the width and the length of the upper and lower jaw dental arches. Indications include bilateral or unilateral narrowing of the upper and lower jaw arches; the anterior segment of the mandibular dental arch is shortened due to the inward inclination of the upper and lower mandibular anterior teeth, crowding or congenital missing incisors; the clinical application is very wide due to the reduction of the length of the dental arch caused by the molar antedisplacement and the like. However, the existing spiral bow expander can exert the bow expanding effect only by periodically rotating the spiral hole by using the adjusting rod, the applied bow expanding force cannot be controlled, and doctors judge that the bow expander rotates for one circle, a half circle or a quarter circle by experience.
The Chinese patent application with the publication number of CN111473740A discloses a device capable of monitoring the deformation of an expansion arch on line and a component thereof, the device only utilizes an optical fiber to solve the problem of monitoring the moving distance of a planting nail in the expansion arch operation, and the expansion arch force can not be controlled.
Chinese patent application publication No. CN111374789A discloses an arch expansion device adaptable to individual differential palatal implant, which is characterized in that the bracket can be individually adjusted, and the size of the arch expansion force and the size of the displacement of the arch expansion cannot be controlled.
Chinese patent application publication No. CN111658190A discloses a two-dimensional maxillary molar moving device, which is characterized in that the device only reduces the failure risk in the force application process of the micro-implant nail, and the device can not control the expansion force and the expansion displacement. Similar problems exist in other inventions and utility patents related to the bow expander, such as CN111568573A, CN111568573A, CN111166513A, CN111166512A, CN211560428U, CN211156373U, CN211560480U, etc.
Disclosure of Invention
The invention provides a control method of an orthodontic arch expanding device capable of accurately applying force, aiming at the technical problem that the existing arch expanding device cannot accurately control the size of the arch expanding force.
Therefore, the invention provides a control method of an orthodontic arch expanding device capable of accurately applying force, which uses the orthodontic arch expanding device, wherein the orthodontic arch expanding device is provided with a driving motor, a motor bracket, a guide rod, a driving screw rod, a slide block and a controller; the driving motor is arranged in the center of the motor bracket, and the guide rods are arranged on two sides of the motor bracket and are perpendicular to the motor bracket; the driving screw is connected with the driving motor and is parallel to the guide rod; the sliding block is parallel to the motor bracket and is driven by the driving screw rod, and the sliding block can slide along the guide rod; which comprises the following steps:
(1) setting a driving force according to the required expansion force, and calculating according to a screw thrust calculation formula:
F＝2πTη/L
letter meaning:
f: thrust, in units of N;
pi: circumference ratio, 3.14;
t: the motor output torque, in units of N.M;
eta: the transmission efficiency of the screw rod is 0.9;
l: lead of screw rod, unit M;
obtaining the output torque T of the drive motor:
T＝FL/2πη
the output torque of the driving motor is kept, and the expansion bow force can be controlled;
(2) setting the number of revolutions of a driving motor according to the required expansion displacement, and according to a formula:
S＝nL
s: bow expansion displacement in M;
l: lead of screw rod, unit M;
n: the number of revolutions of the driving motor;
obtaining the revolution number n of the driving motor:
n＝S/L
the driving motor is controlled to automatically stop after reaching the set revolution, and the displacement of the expanded bow can be controlled.
Preferably, the controller comprises a control module, a communication module and a power supply module; the control module is used for controlling the torque and starting and stopping of the driving motor; the communication module is used for setting the torque and the start-stop conditions of the driving motor; the power module is used for providing power for the driving motor and the controller.
Preferably, the driving screw is provided with a pressure sensor for measuring the pressure provided by the orthodontic arch expanding device, and feeding back a pressure signal to the controller for controlling the start and stop of the driving motor.
Preferably, a pressure sensor is arranged on the sliding block and used for measuring the pressure provided by the orthodontic arch expanding device, and feeding back a pressure signal to the controller and controlling the start and stop of the driving motor.
Preferably, a displacement sensor is arranged on the guide rod and used for measuring the displacement of the sliding block, and a displacement signal is fed back to the controller and used for controlling the start and stop of the driving motor.
Preferably, the communication module is a wireless communication module.
The invention has the beneficial effects that:
(1) the bow-expanding device can accurately control the applied bow-expanding force by controlling the torque of the motor or according to the signal of the pressure sensor;
(2) the bow expanding device can accurately control the displacement of the bow expanding by controlling the rotation number of the motor or according to the signal of the displacement sensor.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the bow expander of the present invention.
The symbols in the drawings illustrate that:
1. a controller; 2. a drive motor; 3. a motor bracket; 4. a slider; 5. a drive screw; 6. a guide bar; 7. a bow expander; 8. arrow card; 9. a jaw plate; 10. and J hook.
Detailed Description
The present invention will be further described with reference to the following examples.
Examples
As shown in fig. 1, the orthodontic arch expanding device provided by the invention is provided with a controller 1, a driving motor 2, a motor bracket 3, a guide rod 6, a driving screw rod 5 and a slide block 4; the driving motor 2 is arranged in the center of the motor bracket 3, and the guide rods 6 are arranged on two sides of the motor bracket 3 and are vertical to the motor bracket 3; the driving screw 6 is connected with the driving motor 2 and is parallel to the guide rod 6; the slide block 4 is parallel to the motor bracket 2 and is driven by a driving screw rod 5, and the slide block 4 can slide along a guide rod 6.
The controller 1 comprises a control module, a communication module and a power supply module; the control module is used for controlling the torque and starting and stopping of the driving motor 2; the communication module is connected with the computer terminal and is used for setting the torque and the start-stop conditions of the driving motor 2; the power module is used for providing power for the driving motor 2 and the controller 1.
The driving screw 5 is provided with a pressure sensor for measuring the pressure provided by the orthodontic arch expanding device, and feeding back a pressure signal to the controller 1 for controlling the start and stop of the driving motor 2.
The slide block 4 can also be provided with a pressure sensor for measuring the pressure provided by the orthodontic arch expanding device and feeding back a pressure signal to the controller 1 for controlling the start and stop of the driving motor 2.
And a displacement sensor is arranged on the guide rod 6 and used for measuring the displacement of the sliding block, and feeding a displacement signal back to the controller 1 and controlling the start and stop of the driving motor 2.
The communication module is a wireless communication module and can be connected with the computer terminal in a wireless connection mode.
As shown in figure 2, for the arch expander, base resin is used for embedding, a jaw plate 9 consisting of two halves is manufactured, wherein one half is fixed with a motor bracket 3, the other half is fixed with a slide block 4, a driving screw rod 5 in the jaw plate 9 can freely rotate, and the slide block 4 can freely slide along a guide rod 6.
The jaw plate 9 is customized according to the plaster model of the patient to be taken, embedding arrow card 8 and J hook 10 for fixing the jaw plate 9 on the teeth.
The user (doctor) sets the driving force according to the required bow-expanding force of the patient, and the screw thrust calculation formula is adopted:
F＝2πTη/L
letter meaning:
f: thrust, in units of N;
pi: taking the circumference ratio of 3.14;
t: the motor output torque, in units of N.M;
eta: the transmission efficiency of the screw rod is 0.9;
l: lead of screw rod, unit M;
the output torque T of the drive motor can be derived:
T＝FL/2πη
the control system keeps the output torque of the driving motor to control the bow-expanding force.
The user (doctor) sets the number of revolutions of the drive motor according to the bow-expanding displacement required by the patient according to the formula:
S＝nL
s: bow expansion displacement in M;
l: lead of screw rod, unit M;
n: the number of revolutions of the driving motor;
the number of revolutions n of the drive motor can be deduced:
n＝S/L
the control system controls the driving motor to automatically stop after reaching the set revolution, and the expansion bow displacement can be controlled.
However, the above embodiments are only examples of the present invention, and the scope of the present invention should not be limited thereby, and the substitution of equivalent elements or the equivalent changes and modifications made according to the scope of the present invention should be covered by the claims.
Claims (6)
1. A control method of an orthodontic arch expanding device capable of accurately applying force uses the orthodontic arch expanding device, wherein the orthodontic arch expanding device is provided with a driving motor, a motor bracket, a guide rod, a driving screw rod, a sliding block and a controller; the driving motor is arranged in the center of the motor bracket, and the guide rods are arranged on two sides of the motor bracket and are perpendicular to the motor bracket; the driving screw is connected with the driving motor and is parallel to the guide rod; the sliding block is parallel to the motor bracket and is driven by the driving screw rod, and the sliding block can slide along the guide rod; the method is characterized by comprising the following steps:
(1) setting a driving force according to the required expansion force, and calculating according to a screw thrust calculation formula:
F＝2πTη/L
letter meaning:
f: thrust, in units of N;
pi: circumference ratio, 3.14;
t: the motor output torque, in units of N.M;
eta: the transmission efficiency of the screw rod is 0.9;
l: lead of screw rod, unit M;
obtaining the output torque T of the drive motor:
T＝FL/2πη
the output torque of the driving motor is kept, and the expansion bow force can be controlled;
(2) setting the number of revolutions of a driving motor according to the required expansion displacement, and according to a formula:
S＝nL
s: bow expansion displacement in M;
l: lead of screw rod, unit M;
n: the number of revolutions of the driving motor;
obtaining the revolution number n of the driving motor:
n＝S/L
the driving motor is controlled to automatically stop after reaching the set revolution, and the displacement of the expanded bow can be controlled.
2. The method for controlling a precisely forced orthodontic arch expander device of claim 1, wherein the controller comprises a control module, a communication module and a power module; the control module is used for controlling the torque and starting and stopping of the driving motor; the communication module is used for setting the torque and the start-stop conditions of the driving motor; the power module is used for providing power for the driving motor and the controller.
3. The method for controlling the orthodontic arch expander capable of accurately exerting force according to claim 1, wherein the driving screw is provided with a pressure sensor for measuring the pressure provided by the orthodontic arch expander and feeding a pressure signal back to the controller for controlling the start and stop of the driving motor.
4. The method for controlling the orthodontic arch expanding device capable of accurately exerting force according to claim 1, wherein a pressure sensor is arranged on the sliding block and used for measuring the pressure provided by the orthodontic arch expanding device and feeding back a pressure signal to the controller so as to control the start and stop of the driving motor.
5. The method for controlling the orthodontic arch expanding device capable of accurately exerting force according to claim 1, wherein a displacement sensor is arranged on the guide rod and used for measuring the displacement of the sliding block and feeding a displacement signal back to the controller to control the start and stop of the driving motor.
6. The method for controlling an orthodontic arch expander capable of accurately applying force according to claim 2, wherein the communication module is a wireless communication module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061412.6A CN112842580B (en) | 2021-01-18 | 2021-01-18 | Control method of orthodontic arch expanding device capable of accurately applying force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110061412.6A CN112842580B (en) | 2021-01-18 | 2021-01-18 | Control method of orthodontic arch expanding device capable of accurately applying force |
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| Publication Number | Publication Date |
|---|---|
| CN112842580A true CN112842580A (en) | 2021-05-28 |
| CN112842580B CN112842580B (en) | 2022-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110061412.6A Active CN112842580B (en) | 2021-01-18 | 2021-01-18 | Control method of orthodontic arch expanding device capable of accurately applying force |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023033755A1 (en) * | 2021-08-31 | 2023-03-09 | T.C. Istanbul Aydin Univeristesi | Upper jaw expansion structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205758742U (en) * | 2016-04-29 | 2016-12-07 | 浙江大学医学院附属口腔医院 | A kind of expansion arcuate activator for correcting II class misfit |
| CN208958365U (en) * | 2018-03-28 | 2019-06-11 | 贾海潮 | A kind of plantation nail auxiliary anchorage Maxillary Expansion device |
| CN209695419U (en) * | 2019-01-18 | 2019-11-29 | 广州锦冠桥实业有限公司 | Expand begg appliance device |
| CN210330782U (en) * | 2019-06-22 | 2020-04-17 | 上海精功齿科技术有限公司 | Quick horizontal arch device that expands of upper jaw |
| CN214285234U (en) * | 2021-01-18 | 2021-09-28 | 北京大学口腔医学院 | Orthodontic arch expanding device capable of accurately applying force |
-
2021
- 2021-01-18 CN CN202110061412.6A patent/CN112842580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205758742U (en) * | 2016-04-29 | 2016-12-07 | 浙江大学医学院附属口腔医院 | A kind of expansion arcuate activator for correcting II class misfit |
| CN208958365U (en) * | 2018-03-28 | 2019-06-11 | 贾海潮 | A kind of plantation nail auxiliary anchorage Maxillary Expansion device |
| CN209695419U (en) * | 2019-01-18 | 2019-11-29 | 广州锦冠桥实业有限公司 | Expand begg appliance device |
| CN210330782U (en) * | 2019-06-22 | 2020-04-17 | 上海精功齿科技术有限公司 | Quick horizontal arch device that expands of upper jaw |
| CN214285234U (en) * | 2021-01-18 | 2021-09-28 | 北京大学口腔医学院 | Orthodontic arch expanding device capable of accurately applying force |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023033755A1 (en) * | 2021-08-31 | 2023-03-09 | T.C. Istanbul Aydin Univeristesi | Upper jaw expansion structure |
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| CN112842580B (en) | 2022-02-18 |
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