CN110169836A - A method of removal dental surface pigment - Google Patents

Abstract

The embodiment of the invention discloses a method for removing the pigment on the tooth surface. The method adopts an ultrashort pulse laser to remove the pigment on the tooth surface. The present invention removes the pigment on the tooth surface by selecting an ultra-short-pulse laser, which can realize the pigment removal without thermal stimulation and mechanical vibration, improves comfort, and can efficiently remove the pigment on the tooth surface to achieve the effect of whitening the teeth.

Description

A method for removing pigment from the surface of teeth

technical field

The embodiment of the present invention relates to the field of cosmetic technology, in particular to a method for removing pigment on the tooth surface.

Background technique

In order to be more helpful in work or interpersonal relationship, the demand for cosmetic plastic surgery is increasingly demanded by the public. Among them, teeth whitening can make people have a mouthful of white teeth, deepen the impression of others, and have a positive effect on work. For the service industry that often needs to show people with a smile, it will bring great help. Whether it is for work or interpersonal needs, tooth whitening has hidden a considerable market, especially led by advanced countries in Europe, America and Japan, tooth whitening has gradually become a trend in China. The darkening of tooth color can be roughly divided into systemic factors (such as age, constitution) and local factors (smoking, tea, red wine, and dark food). Among them, most of the patients with local factors are mainly caused by food coloring caused by eating habits. Organic pigments (C, H, O compounds) are deposited on the tooth surface. If there is no action to clean the teeth at this time, the pigment will be deposited in the deep layer of the teeth over time, and the surface of the teeth will start to turn yellow or even black.

In recent years, people have higher and higher requirements for the beauty of teeth. Neat and white teeth not only give people the enjoyment of beauty, but also increase their self-confidence, and play a pivotal role in social communication and work. However, in real life, tooth staining caused by exogenous factors such as coffee, tea, beverages and other colored foods is more and more common, which has many adverse effects on the patient's appearance, psychology, physical health and social interaction. At present, the commonly used methods for removing pigment include: ultrasonic cleaning equipment, sandblasting, silicon particles, toothbrush, whitening toothpaste, tooth stain remover, etc. However, these methods have problems of poor removal effect and comfort, and are easy to damage to tooth tissue.

Contents of the invention

For this reason, the embodiment of the present invention provides a method for removing pigment on the tooth surface, so as to solve the problems of poor removal effect and comfort in existing methods for removing tooth pigment, and easily causing damage to tooth tissue.

In order to achieve the above purpose, embodiments of the present invention provide the following technical solutions:

According to the first aspect of the embodiments of the present invention, there is provided a method for removing pigment on the tooth surface, the method adopts ultrashort pulse laser to remove the pigment on the tooth surface.

The present invention removes the pigment on the tooth surface by selecting an ultra-short-pulse laser, which can realize the pigment removal without thermal stimulation and mechanical vibration, improves the comfort, and can efficiently remove the pigment on the tooth surface to achieve the effect of whitening the teeth.

Further, the method for removing tooth surface pigment specifically includes the following steps:

(a) Obtain the scanned data of the pigmented tooth and its dentition, and reconstruct the three-dimensional data of the pigmented tooth and the dentition of the pigmented tooth;

(b) separating the three-dimensional data of the pigmented layer from the three-dimensional data of the attached pigmented tooth according to the gray value of the scanned data of the attached pigmented tooth;

(c) Using an intraoral scanner to obtain the surface three-dimensional scanning data of the dentition where the pigmented tooth is located, register the surface 3D scanning data of the dentition where the pigmented tooth is located with the 3D data of the dentition where the pigmented tooth is located, and make a wearable Locators on the dentition and exposed pigmented areas;

(d) Install the locator on the dentition where the pigmented tooth is located, and use an intraoral scanner to obtain surface three-dimensional scanning data of the locator and the dentition where it is located;

(e) Register the positioner and the surface 3D scanning data of the dentition and the 3D data of the pigment layer, install the control head of the ultrashort pulse laser on the positioner, plan the cutting trajectory of the ultrashort pulse laser, and adjust the ultrashort pulse laser. The parameters of the short-pulse laser follow the cutting trajectory to remove the pigment layer on the tooth surface.

Through the above-mentioned specific treatment method, the present invention can realize precise removal of tooth surface pigment, avoid damage to tooth tissue, and avoid tissue damage caused by improper operation caused by human subjective factors.

Further, the manufacturing method of the locator is: design a locator with an opening facing the pigmented area according to the arch shape of the dentition where the pigmented area is located, and use three-dimensional printing to make it; preferably, the material of the locator is high temperature and high pressure resistant Sterilized titanium, titanium alloy or polymer non-metallic materials.

Further, the power of the ultrashort pulse laser is adjusted to 1-5W.

Further, the pulse frequency of the ultrashort pulse laser is adjusted to 1-200KHz.

By limiting the parameters of the ultrashort pulse laser, the invention can improve the pigment removal effect and avoid damage to teeth.

Further, in the step (a), the scanning data acquisition mode is selected from any one of CT, CBCT and MRI.

Further, in the step (a), the scan data is reconstructed into three-dimensional data by image processing software; preferably, the image processing software is selected from any one of Mimics, Amira, CT, CBCT and MRI's own software kind.

Further, the cutting trajectory is planned by path planning software; preferably, the planned trajectory is layered cutting of the entire block of attached pigment, and the single-layer area is moved and cut according to serpentine lines, concentric circles, or concentric frames.

Further, the control head is detachably and rigidly connected to the positioner.

Further, the ultrashort pulse laser is picosecond laser or femtosecond laser.

Embodiments of the present invention have the following advantages:

(1) The present invention removes the pigment on the tooth surface by selecting an ultra-short-pulse laser, which can realize the removal of the pigment without thermal stimulation and mechanical vibration, improves the comfort, and can efficiently remove the pigment on the tooth surface to achieve the effect of whitening teeth .

(2) Through the locator and the establishment of three-dimensional data, the present invention can realize accurate removal of tooth surface pigment, avoid damage to tooth tissue, and avoid tissue damage caused by improper operation caused by human subjective factors.

Detailed ways

The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Example 1

Present embodiment is a kind of method for removing tooth surface pigment, and this method comprises the steps:

(a) Use CT to obtain the scan data of the pigmented teeth and their dentition, and then use CT’s built-in imaging processing software to reconstruct the scan data into 3D data of the pigmented teeth and 3D data of the dentition where the pigmented teeth are located;

(b) separating the three-dimensional data of the pigmented layer from the three-dimensional data of the attached pigmented tooth according to the gray value of the scanned data of the attached pigmented tooth;

(c) Use an intraoral scanner to obtain the surface 3D scanning data of the dentition where the pigmented tooth is located, and register the 3D scanning data of the surface of the dentition where the pigmented tooth is located with the 3D data of the dentition where the pigmented tooth is located, and use a 3D printer based on The arch shape of the dentition where the pigmented area is located will print a locator with an opening facing the pigmented area in titanium alloy material, which can be worn on the dentition and expose the locator of the pigmented area;

(d) Install the locator on the dentition where the pigmented tooth is located, and use an intraoral scanner to obtain surface three-dimensional scanning data of the locator and the dentition where it is located;

(e) Register the positioner and the surface 3D scanning data of the dentition and the 3D data of the pigment layer, detachably install the control head of the ultrashort pulse laser on the positioner, and plan the ultrashort pulse through the path planning software For the cutting track of the laser, the power of the ultrashort pulse laser is adjusted to 1W, and the pulse frequency is 200KHz, and the pigment layer on the tooth surface is removed according to the cutting track.

Example 2

Present embodiment is a kind of method for removing tooth surface pigment, and this method comprises the steps:

(a) MRI is used to obtain the scan data of the pigmented teeth and the dentition where they are located, and then MRI’s built-in imaging processing software is used to reconstruct the scanned data into the 3D data of the pigmented teeth and the 3D data of the dentition where the pigmented teeth are located;

(b) separating the three-dimensional data of the pigmented layer from the three-dimensional data of the attached pigmented tooth according to the gray value of the scanned data of the attached pigmented tooth;

(c) Use an intraoral scanner to obtain the surface 3D scanning data of the dentition where the pigmented tooth is located, and register the 3D scanning data of the surface of the dentition where the pigmented tooth is located with the 3D data of the dentition where the pigmented tooth is located, and use a 3D printer based on The arch shape of the dentition where the pigmented area is located will print a locator with an opening facing the pigmented area in titanium alloy material, which can be worn on the dentition and expose the locator of the pigmented area;

(d) Install the locator on the dentition where the pigmented tooth is located, and use an intraoral scanner to obtain surface three-dimensional scanning data of the locator and the dentition where it is located;

(e) Register the positioner and the surface 3D scanning data of the dentition and the 3D data of the pigment layer, detachably install the control head of the ultrashort pulse laser on the positioner, and plan the ultrashort pulse through the path planning software For the cutting track of the laser, adjust the power of the ultrashort pulse laser to 5W and the pulse frequency to 1KHz, and remove the pigment layer on the tooth surface according to the cutting track.

Example 3

Present embodiment is a kind of method for removing tooth surface pigment, and this method comprises the steps:

(a) Use CBCT to obtain the scan data of the pigmented teeth and their dentition, and then use the CBCT’s built-in imaging processing software to reconstruct the scanned data into 3D data of the pigmented teeth and 3D data of the dentition where the pigmented teeth are located;

(b) separating the three-dimensional data of the pigmented layer from the three-dimensional data of the attached pigmented tooth according to the gray value of the scanned data of the attached pigmented tooth;

(c) Use an intraoral scanner to obtain the surface 3D scanning data of the dentition where the pigmented tooth is located, and register the 3D scanning data of the surface of the dentition where the pigmented tooth is located with the 3D data of the dentition where the pigmented tooth is located, and use a 3D printer based on The arch shape of the dentition where the pigmented area is located will print a locator with an opening facing the pigmented area in titanium alloy material, which can be worn on the dentition and expose the locator of the pigmented area;

(d) Install the locator on the dentition where the pigmented tooth is located, and use an intraoral scanner to obtain surface three-dimensional scanning data of the locator and the dentition where it is located;

(e) Register the positioner and the surface 3D scanning data of the dentition and the 3D data of the pigment layer, detachably install the control head of the ultrashort pulse laser on the positioner, and plan the ultrashort pulse through the path planning software For the cutting track of the laser, the power of the ultrashort pulse laser is adjusted to 3W, and the pulse frequency is 100KHz, and the pigment layer on the tooth surface is removed according to the cutting track.

Application example 1

Yan Moumou, male, 34 years old, likes to eat betel nuts, and uses the Vita shade guide to match the tooth color of the application object, and the matching result is B4; the pigment on the teeth is removed by the method of Example 3 of the present invention. After removal, The same Vita color palette is also used to match the teeth of the application object, and the matching result shows B2.

Application example 2

Wang Moumou, male, 30 years old, likes to drink strong tea, brushes teeth not in time, adopts 3D color guide to match with the tooth color of the application object, and the matching result is 3M2; adopt the method of embodiment 2 of the present invention to carry out the pigment on the tooth After removal, the same 3D color guide is also used to match the teeth of the application object, and the matching result shows 2M1.

Application example 3

Liu, female, 25 years old, likes to drink coffee, brushes teeth not in time, adopts Vita color guide to match with the tooth color of the application object, and the matching result is A4; adopt the method of the embodiment of the present invention 1 to remove the pigment on the teeth, After removal, the same Vita shade guide is also used to match the teeth of the application target, and the matching result shows A2.

Application example 4

Zhao, man, 31 years old, 10 years of smoking history, brushing teeth not in time, using Vita shade guide to match the color of the teeth of the application object, the matching result is C4; adopt the method of the embodiment of the present invention 4 to carry out the pigment on the teeth After removal, the same Vita shade guide is also used to match the teeth of the application object, and the matching result shows B2.

Although the present invention has been described in detail with general descriptions and specific examples above, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, the modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the protection scope of the present invention.

Claims (9)

1. A method for removing tooth surface pigment, is characterized in that, adopts ultrashort pulse laser to remove tooth surface pigment. 2. The method according to claim 1, characterized in that, comprising the steps of: (a) Obtain the scanned data of the pigmented tooth and its dentition, and reconstruct the three-dimensional data of the pigmented tooth and the dentition of the pigmented tooth; (b) separating the three-dimensional data of the pigmented layer from the three-dimensional data of the attached pigmented tooth according to the gray value of the scanned data of the attached pigmented tooth; (c) Using an intraoral scanner to obtain the surface three-dimensional scanning data of the dentition where the pigmented tooth is located, register the surface 3D scanning data of the dentition where the pigmented tooth is located with the 3D data of the dentition where the pigmented tooth is located, and make a wearable Locators on the dentition and exposed pigmented areas; (d) Install the locator on the dentition where the pigmented tooth is located, and use an intraoral scanner to obtain surface three-dimensional scanning data of the locator and the dentition where it is located; (e) Register the positioner and the surface 3D scanning data of the dentition and the 3D data of the pigment layer, install the control head of the ultrashort pulse laser on the positioner, plan the cutting trajectory of the ultrashort pulse laser, and adjust the ultrashort pulse laser. The parameters of the short-pulse laser follow the cutting trajectory to remove the pigment layer on the tooth surface. 3. The method according to claim 2, characterized in that the power of the ultrashort pulse laser is adjusted to 1-5W. 4. The method according to claim 2, characterized in that the pulse frequency of the ultrashort pulse laser is adjusted to 1-200KHz. 5. The method according to claim 2, characterized in that, in the step (a), the scan data is acquired in any one of CT, CBCT and MRI. 6. The method according to claim 2, characterized in that, in the step (a), the scanned data is reconstructed into three-dimensional data by image processing software. 7. The method according to claim 6, wherein the image processing software is selected from any one of Mimics, Amira, CT, CBCT and MRI self-contained software. 8. The method according to claim 2, wherein the cutting trajectory is planned by path planning software. 9. The method according to any one of claims 1-8, wherein the ultrashort pulse laser is a picosecond laser or a femtosecond laser.