KR20150041876A - Method for evaluating skin elasticity using mold - Google Patents

Abstract

This invention is a method for evaluating skin elasticity and restitution using mold with uneven pattern. In particular, the invention is about a method to evaluate the skin elasticity through the skin surface change caused by pressuring the skin surface with mold with uneven pattern.

Description

[0001] The present invention relates to a method for evaluating skin elasticity using a mold,

The present invention relates to a method for evaluating skin elasticity characteristics including flexibility and restoring force of a skin using a mold including a concavo-convex pattern, and more particularly, And a method for evaluating skin elasticity characteristics through skin surface changes.

Unlike insects with hard skin, human skins are composed of several layers of exoskeleton structure and a smooth but elastic cell tissue outside skeleton and muscle. Such skin has elasticity-related characteristics such as various viscosities and elasticities such as degree of hardness and degree of extension of skin due to various factors such as the degree of bonding between cells and tissues constituting the tissue, It shows various aspects. These elastic properties of the skin are characterized by decreasing or changing characteristics such as aging of the skin itself and tissue changes due to wound healing, etc. In addition to other tissue changes such as muscle changes due to aging, skin elasticity is decreased, sagging or wrinkling occurs, Is known as one of the indicators of.

Generally, in order to evaluate the elasticity of the skin, a method of visually evaluating the degree of sagging of the skin through photographing or the like, or a method of measuring the degree of change of the skin by pulling or contacting the skin by applying a negative pressure However, it is difficult to understand the change of elasticity because it is difficult to show the change of elasticity visually by only showing the measurement value of a specific measurement site. In case that a special measurement device should be manufactured and used, the cost problem and the number of measurement There is a disadvantage that the measurement site is limited.

Korean Registered Patent No. 10-0969503 (July 14, 2010)

Accordingly, the present inventors have found that, in order to provide a method for objectively evaluating skin elasticity characteristics without using a separate dedicated measuring device, The present invention has been completed.

Therefore, it is an object of the present invention to provide a skin elasticity evaluation method which can automate an evaluation method because it is possible to obtain an objective result while a skin elasticity characteristic can be expressed by a visual image without requiring a separate dedicated measuring device will be.

In order to achieve the above object, the present invention provides a method for evaluating skin elasticity characteristics through skin surface change induced by pressing a skin using a mold having a pattern.

Hereinafter, the present invention will be described more specifically.

According to an embodiment of the present invention, there is provided a skin elasticity evaluation method comprising: pressing a skin surface with a mold including a pattern; And analyzing the shape change of the pressed skin surface.

FIG. 1 is a schematic view exemplarily showing a skin elasticity evaluation method according to an embodiment of the present invention, in which a mold having a specific concavo-convex pattern structure is pressed against the skin, and the degree and shape of the mold pattern marks , And the degree and speed of change of the mold pattern mark according to the passage of time.

In one embodiment of the present invention, the skin elasticity evaluation method

a) measuring the shape of the skin surface to be evaluated;

b) pressing the surface of the skin with a mold including a concavo-convex pattern;

c) measuring the shape of the skin surface at a predetermined time interval after the pressing; And

d) analyzing the shape change of the skin surface measured in the step c);

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In one embodiment of the present invention, the mold includes a pattern for pressing the skin to cause a change in the surface of the skin, and any material can be used as long as the shape of the mold itself is not deformed when the skin is pressed. Further, the mold may have a different size and shape depending on the skin part to be evaluated, the target evaluation item, and the like, and may have, for example, a flat shape, a concave shape, a convex shape, or a curved shape. , And a pattern of a concave-convex shape on the mold can be included.

In one embodiment of the present invention, the pattern may include a concavo-convex pattern in which convex portions and concave portions are arranged to press the skin and cause a pattern to be reflected on the skin surface to cause deformation. For example, the convex portion may include a round convex portion, such as a round sphere having a rounded end, a polygonal prism having a flat top surface, a polygonal pyramid or a polygonal pyramid, and a convex portion having a cross section smaller than that of the base convex portion, However, the shape of the convex portion is not limited as long as it can cause a change in the surface of the skin. The shape, size, height, and arrangement of the convex portions can be variously modified depending on the skin part to be evaluated and the desired evaluation items.

The skin region to be evaluated in the skin elasticity characteristic evaluation according to the embodiment of the present invention is not limited as long as it is a region where the skin elasticity characteristic is to be evaluated.

According to an embodiment of the present invention, the pressure for pressing the skin with the mold should be performed by pressing the entire mold at a constant pressure. However, the strength of the pressure and the pressing time are generally determined according to the target skin area, Can be selected within a range that can cause the desired skin surface deformation without damage.

In one embodiment of the present invention, the measurement of the surface shape of the skin can be performed by image photographing, measurement of concave volume of skin surface, measurement of height of skin surface, and the like. The skin surface shape measurement may be performed according to predetermined time intervals before, during and immediately after the pressurization of the mold, and the time interval may be determined according to a part to be measured, an evaluation item, and the like.

In one embodiment of the present invention, the step of analyzing the shape change of the skin surface means analyzing the change through the shape of the pattern of the mold reflected on the pressed skin surface. The shape of the surface of the skin includes the depth, size, volume, shape, etc. of the pressed area, and analyzes the change of the shape according to the shape immediately after pressing and the time after pressing, thereby including skin flexibility and resilience The elasticity of the skin can be evaluated.

More specifically, the analysis may be performed by visually presenting the photographed image itself when the measurement is an image photographing, and visually comparing the changes. That is, since the shape change analysis of the skin surface reflects a specific pattern, the skin shape change information that can visually recognize the skin elasticity evaluation result through visual evaluation of the photographed image itself can be provided without any device . Also, the size and shape of the photographed image can be analyzed and quantified using general image analysis techniques such as contrast and intensity values using a conventional image analysis tool.

In addition, the analysis can be objectified by numerically comparing volume changes when the measurement is performed by measuring the concave volume on the skin surface or measuring the skin height. When the measurement is performed using a conventional three-dimensional structure analyzer, the measurement result of depth or volume of the skin surface may be displayed as a visual image to visually compare the changes.

In addition, the analysis of the morphological change of the surface of the skin can numerically objectify evaluation results by using a conventional image analysis tool or a skin three-dimensional structure analyzing apparatus for analyzing the image itself, and furthermore, it is possible to automate evaluation of skin elasticity characteristics.

The method according to the present invention can visually express the extent of the skin change due to elasticity of the skin visually by using the characteristic that the elasticity and the restoring force of the specific part of the skin are changed by the mold and then returned to the original form Because it induces a certain type of skin shape change by the mold, various pressure condition or form condition can be used at once according to the purpose, and even if a separate elasticity measuring device is not used, Analysis can be used to quantify changes in elasticity of the skin without a separate measuring device. Furthermore, since the method similar to the phenomenon caused by the elasticity change of the skin that can be experienced in the life such as the pillow mark is used, understanding of the skin elasticity change of the general person can be improved, And it is possible to construct an automated evaluation system by recognizing patterns and performing image processing.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram illustrating a skin elasticity evaluation method according to an embodiment of the present invention. FIG.
2 is a photograph showing a result of visualizing the change of the skin pressed by a mold using a morphological analyzer.
FIG. 3 shows photographs and image analysis results showing skin changes pressed by a mold.

Hereinafter, the present invention will be described in more detail with reference to test examples. However, these test examples are provided by way of example only to aid understanding of the present invention, and the scope and scope of the present invention are not limited by the following examples.

[Test Example 1] Comparison of conformity with results according to a conventional elasticity measuring device

The following experiment was conducted to confirm whether the result of the skin elasticity evaluation method according to an embodiment of the present invention shows a reliable result consistent with the result using the conventional elasticity evaluation equipment.

The skin was adapted for 15 minutes in 10 ~ 20 ~ 50 subjects after washing with cleanser at constant temperature and humidity condition (20 ℃, RH 40%). The elasticity of the entire cheek and arm of the examinee's face was measured with a conventional elasticity measuring device (Cutometer, Courage + Khazaka electronic GmbH, Germany), and the corresponding part was subjected to preliminary measurement of three- Use the moss (PRIMOS, GFMesstechnik GmbH, Germany) to record the skin type of the area. Using a mold of a specific shape (in which convex portions having a diameter of 2 mm and rounded ends on a plane made of polypropylene are arranged at 5 mm intervals with 1 mm intervals), the corresponding portions are pressed for 10 seconds at a constant pressure (225 g / cm 2) Let the mark occur. Immediately after compression, the skin type is similarly measured using the above-mentioned Primus, and the measurement is repeated again after 5 minutes. Using the measured data, the volume of marks formed on the surface of the skin by the mold was analyzed, and the results are shown in Table 1 below.

part cheek Full bang CUTOMETER MEASUREMENTS (R0) 0.2053 0.2111 Calorimeter measurement (R7) 0.4684 0.6732 Point Before pressurization Immediately after pressurization Press after 5 minutes Before pressurization Immediately after pressurization Press after 5 minutes Total volume (㎣) 3.8159 6.1223 4.9726 3.6419 4.7329 4.3791 Change rate before pressurization (%) - 60.44 30.31 - 29.95 20.24

In the results of Table 1, it can be seen that the total volume of concave portions of the skin surface greatly increases immediately after the pressurization with the mold, and decreases with the restoration of the deformed skin with time. In addition, it can be seen that the results of the same subjects, but the skin elasticity measurement values (volume total and change rate) using the mold and the measurement values by the calmeters are different according to the measurement site (cheeks and full spots).

Specifically, the R0 value, which indicates the hardness of the skin, is higher than that of the cheek, and the skin volume change using the mold is lower than that of the cheek at all times and the change rate is low The result shows that the results of the Kyutometer and the results of using the mold are consistent with each other. In addition, the R7 value indicating the elasticity of the skin by the restorative force of the measured values by the Coulometric meter is higher than that of the cheek and the result of using the mold shows that the change rate of the total volume after 5 minutes of pressurization before pressing is higher than that of the cheek It can be confirmed that the restoring force also shows a tendency to be consistent with the result of the conventional elastic device and can be quantified.

Also, in the test, the change in volume immediately after pressurization of the elasticity evaluation using a mold using the R7 measurement value of the cutometer and the analysis method of the present invention is as follows: the higher the resilience value of the cutometer, the lower the skin change degree value of the elasticity evaluation method using the mold (P < 0.05), as shown in Table 2 below, indicating that the evaluation method of the present invention is able to evaluate the elasticity as in the conventional elasticity evaluation equipment .

Kyutometer R7 - Volume change immediately after pressurization (㎣) Correlation comparison Correlation coefficient -0.451 Probability of significance 0.046

[Test Example 2] Visualization and analysis of elasticity characteristics

2-1. Analysis through total skin volume

Two subjects (subjects 1 and 2) having mutually different values of the Rt7 of the testimonies of Test Example 1 were subjected to the same test conditions and methods as in Test Example 1, The skin image was taken 5 minutes after the pressurization and the skin surface morphology was measured using the premose equipment. The results are shown in Table 3 below. Each skin measurement was performed three times at 60-minute intervals and the average value was used.

Subject number Cutting meter Analysis of change of cheek volume using mold R7 Before pressurization Immediately after pressurization Press after 5 minutes One 0.4901 6.9467 8.7004
(Before pressurization + 25.25%) 8.0492
(Immediately after pressurization-7.49%) 2 0.3476 4.5183 6.1391
(+ 35.9% before pressurization) 5.1080
(Immediately after pressurization-16.80%)

In the results of Table 3, it can be seen that the elasticity characteristics of the two subjects are significantly different even in the case of using the mold, as in the case of the conventional elasticity measuring instrument, the Rule Q7.

2-2. Visualization and analysis using skin surface morphology analyzer

The skin elasticity evaluation method using a mold according to an embodiment of the present invention is a method of evaluating the skin elasticity by using the pre-mos, which is a device for measuring the skin texture and shape, It is possible to visually distinguish the difference such as the numerical characteristic with the image alone. 2 shows the skin height and height of the skin of the subjects 1 and 2 of 2-1. Before pressing, immediately after pressing, and after pressing 5 minutes using pre-moss. So that it is possible to visually confirm the skin shape change at the time of measurement according to the skin elasticity of the subject. In the result of FIG. 2, the subject 1 having a high R7 value is visually confirmed that the mark due to the mold is shallower than that of the subject 2 immediately after the pressurization, and that the skin mark is returned quickly after 5 minutes of pressurization.

2-3. Visualization and analysis using skin photographs

In addition, the skin elasticity evaluation method using a mold according to an embodiment of the present invention can visualize and evaluate elasticity characteristics by image analysis of a change in a photograph itself without using equipment such as a primus after photographing a photograph of a subject. Fig. 3 shows the results of skin photographs and image analysis apparatuses before, after and immediately after pressurization of subjects 1 and 2 of 2-1. Above, and the results of the above 2-1 to 2-2 The intensity of the image of the corresponding part of the actual image is analyzed in comparison with that of the subject 2 in which the elasticity is low in the subject 1, Can be numerically confirmed.

Claims (8)

Pressing the surface of the skin with a mold including a concavo-convex pattern; And analyzing the shape change of the pressed skin surface. The method according to claim 1,
a) measuring the shape of the skin surface to be evaluated;
b) pressing the surface of the skin with a mold including a concavo-convex pattern;
c) measuring the shape of the skin surface at a predetermined time interval after the pressing; And
d) analyzing the shape change of the skin surface measured in the step c);
And evaluating the skin elasticity. 3. The method of claim 2,
Wherein the measurements of steps a) and c) are performed by recording an image of the skin surface and recording the microstructure of the skin. The method of claim 3,
Wherein the analysis of step d) is performed by analyzing at least one of a size and a shape of the mold from which the concavo-convex pattern of the mold is reflected from the photographed image. The method of claim 3,
Wherein the analysis of step d) is carried out by digitizing through at least one of image contrast analysis and intensity values of the photographed image. 3. The method of claim 2,
Wherein the measurement of steps a) and c) is performed by measuring the volume of the concave portion of the skin surface. 3. The method of claim 2,
Wherein the measurement of steps a) and c) is performed by measuring the height of the skin surface. 8. The method according to any one of claims 1 to 7,
Wherein the concave-convex pattern is formed by arranging at least two convex portions and concave portions.

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