JP5981113B2 - Evaluation method for sagging of jaw - Google Patents

Description

  The present invention relates to a method for evaluating sagging of a jaw. Furthermore, the present invention also relates to a method for evaluating the effectiveness of jaw sagging improvement processing using the above method.

  Skin sagging in the chin and cheeks is a particular cosmetic concern. It has been pointed out that sagging is caused by a decrease in the elasticity of the dermis, a decrease in the support of the subcutaneous adipose tissue, or a decrease in the muscular strength that supports the skin. Various methods for improving skin sagging have been proposed, such as application of topical agents or oral agents that improve skin elasticity.

  Patent Document 1 describes a method of effectively improving sagging by using a massage using an external preparation for skin, administration of an oral composition, and a cosmetic mask that lifts up the jaw and cheek. ing. In this document, the improvement of sagging in the 40-49 year-old age group is evaluated by the decrease in subcutaneous fat thickness.

  On the other hand, in Non-Patent Document 1, “neck sagging” is defined as sagging due to drooping on the neck skin, with the spine straight up and from the base of the model to the chin, with the face facing forward (excluding the jaw) ), It is described that the drooping is evaluated from the side by comparing the angles formed by the jaw and neck lines and classified into grades. However, since the determination criteria for classifying each grade is not shown, it is predicted that the error by the determiner is large, and there is no suggestion about the correlation between each grade and age.

  Non-Patent Document 2 describes a method for measuring the submandibular skin drooping, and the submandibular shape as seen from the side when the subject is placed on the side and in a sitting position using an electrically controlled bed is placed next to the bed. The size of the sagging (sag) is specified by the area of the region that is changed by comparing the submandibular shape of the lying state and the sitting position. The author concludes that there is a statistically significant correlation between the area and the age, but in order to carry out this method, dedicated equipment is necessary and cumbersome. In addition to the heavy burden, the graph of FIG. 3 showing the measurement results shows that the measured values are equivalent especially at the age of 20 to 40, and it is difficult to say that the change in drooping (sag) in the younger generation is sufficiently reflected. .

  That is, in the prior art, it has not yet been clarified how the sagging of the jaw progresses with age.

JP 2011-148726 A

“Skin Aging Atlas”, Volume 2: Asian edition, written by Laurent Bazan and Frederick Flaman, (Japanese translation by Mori Koji et al.), 2010, MED'COM M.M. Setaro et al., Skin Research and Technology, Vol. 10, p. 251-256 (2004)

  Therefore, the problem in the present invention is to present an objective standard for determining the degree of sag of the jaw that progresses with age, and to evaluate the degree of progress of the sag of the jaw based on it, and to use it An object of the present invention is to provide a method for evaluating the effectiveness of various cosmetic treatments for improving the slackness of the jaw.

  As a result of intensive studies to solve the above-mentioned problems, the present inventors have succeeded in elucidating how the sagging of the jaw due to age progresses, and objectively determining the degree of progress The present inventors have found that a new standard can be established and have completed the present invention.

That is, the present invention relates to the following grade 0-5 evaluation criteria for the step of observing the shape of the neck from the jaw of the subject from the side, and the side shape of the neck from the jaw obtained in the step of observing:
Grade 0: the entire jaw is smooth;
Grade 1: A shape in which slight downward bulging is observed in the jaw;
Grade 2: Shape with a step on the front of the jaw;
Grade 3: The jaws clearly swell downward in a bag shape;
Grade 4: Shape in which the vicinity of the joint between the jaw and the neck is shifted downward from the horizontal extension line of the jaw;
Grade 5: Shape where the vicinity of the joint between the jaw and the neck moves downward from the horizontal extension line of the jaw, making it difficult to distinguish between the jaw and the neck;
A method of evaluating jaw sagging in which the increase in the number of grades indicates the progress of sagging in the jaw.

  The evaluation criteria for jaw sagging used in the present invention correlate with the increase in the number of grades and the progress of jaw sagging due to age. Therefore, according to the evaluation method of the present invention, It is possible to easily determine whether or not the degree of progress of the sag of the jaw is appropriate for the age of the subject, and it is possible to determine the necessity of cosmetic treatment for improving the sag according to the result. . Moreover, the effectiveness of the said beauty treatment can also be evaluated by implementing the evaluation method of this invention before and after the beauty treatment.

Schematic diagram (upper stage of each grade) showing the shape of jaw and neck conforming to the evaluation criteria (grades 0 to 5) used in the method of the present invention and from the jaw of the subject evaluated to belong to each grade It is the photograph (lower stage of each grade) which shows a side shape. It is a schematic diagram which shows the shape of the jaw part and neck which match | combine the further subdivided evaluation criteria (grade 0-9) used by this invention. It is a graph which shows the correlation with the age of a subject, and the evaluation result (grade number) of the subject's jaw slack evaluated according to the method of the present invention. It is a graph which shows the correlation with the body fat rate (%) of a subject, and the evaluation result (the number of grades) of the subject's sagging sagging evaluated according to the method of the present invention. It is a graph which shows correlation with the skeletal muscle rate (%) of a subject, and the evaluation result (the number of grades) of the subject's jaw slack evaluated according to the method of the present invention.

10: jaw, 15: junction between jaw and neck, 20: neck

The method for evaluating sag of the jaw of the present invention includes a step of observing the shape of the neck from the side of the subject's jaw (hereinafter referred to as “observation step”).
In the observation process of the present invention, the subject is allowed to stand in a natural posture with the face facing forward (either standing or sitting), and the shape from the subject's jaw to the neck is observed from the side. To do.

  The observation may be performed by the person who evaluates directly viewing the subject, or by imaging the neck from the jaw of the subject with a camera or the like installed on the side of the subject, You may observe by an image.

  The evaluation method of the present invention includes a step of classifying the side shape of the chin to the neck obtained in the observation step into a grade having a shape that best matches the following evaluation criteria of grades 0 to 5 (hereinafter referred to as “classification”). Process)).

Evaluation criteria:
Grade 0: The entire jaw is smooth.
Grade 1: A shape in which a slight downward bulge is observed in the jaw.
Grade 2: A shape in which a step is recognized at the front of the bulge of the jaw.
Grade 3: A shape in which the bulge of the jaw is clearly bag-shaped.
Grade 4: A shape in which the joint between the jaw and the neck is moved downward from a horizontal extension line passing through the lower end of the jaw-like bulge.
Grade 5: The joint between the jaw and the neck moves downward from the horizontal extension line passing through the lower end of the jaw bag-like bulge, making it difficult to discriminate the boundary between the jaw and the neck.

In FIG. 1, the figure which represented typically the side shape of the neck from the jaw part applicable to each said grade is shown.
In grade 0, the entire jaw portion 10 has a horizontal and smooth shape, and the joint portion 15 between the jaw portion 10 and the neck portion 20 can be clearly identified. In terms of age, those under the age of 20 fall under this grade.

In grade 1, a slight downward bulge is recognized in the jaw, but the joint between the jaw and the neck can be clearly discriminated. In terms of age, those in the late 20s and 30s fall into this grade.
Grade 2 is a shape in which the slight bulge observed in grade 1 is slightly larger, and a step is recognized at the front of the bulge (front of the jaw). In terms of age, those in their 40s fall under this grade.

Grade 3 has a shape in which the bulges observed in grades 1 and 2 are further increased, the jaws are swollen downward in a clear bag shape, and the level difference observed in grade 2 is also observed. The age corresponding to this grade is about 50s.
Grade 4 is a shape in which a downward transition (hanging down) in the vicinity of the joint between the jaw and the neck is recognized in addition to the bag-like bulge and step observed in Grades 1 to 3, and the joint is It moves downward from the horizontal extension line that passes through the lower end of the jaw-like bag-like bulge. In terms of age, the 60s correspond to this grade.

  In grade 5, the joint between the jaw and neck moves further downward (hangs down), making it difficult to distinguish the boundary between the jaw and neck, that is, the skin is directed from the front of the jaw toward the lower neck The shape is descending. In terms of age, those in their 70s and above fall under this grade.

  In this classification step, the side shape of the subject's jaw to neck is classified into the grade of the shape that best matches the evaluation criteria of grades 0 to 5. The most consistent shape is the characteristic shape of each grade of the subject, such as the smoothness of the jaw, the presence or absence of a downward bulge, the presence or absence of a step at the front of the jaw Judgment can be made based on the presence / absence and degree (position) of the downward transition (hanging) of the joint between the jaw and the neck, whether the boundary between the jaw and the neck is clear, etc. . In addition, in FIG. 1, the photograph which shows the typical side surface shape classified into each grade was published in the lower stage.

  When classifying the shape of the side surface of the subject, it is preferable to classify it into a grade with the most matching characteristic shape by observing the subject while referring to and comparing the evaluation criteria when visually observed. .

  On the other hand, in the observation step, when classification is performed using an image captured by a camera or the like, the classification can be performed while performing reference comparison by placing the image and the evaluation standard side by side. In addition, the captured image is taken into a computer, and the computer stores the characteristic shape of the evaluation criterion or an image that embodies the evaluation criterion as shown in FIG. 1, and uses similar image retrieval software or the like to store the image. It is also possible to determine and classify the grade that best matches the shape of the image.

  It has been experimentally confirmed that the above evaluation criteria (grades 0 to 5) show a statistically significant correlation between the increase in the number of grades and the degree of progression of jaw sagging with age. That is, it is possible to easily determine whether or not the progress of the sagging of the subject's jaw is appropriate for the age of the subject.

The present inventor examined the sagging shape of the jaw according to age in more detail, and in addition to the above evaluation criteria (basic evaluation criteria), the following evaluation was further subdivided from grades 3 to 5 of the criteria. Standards (subdivision evaluation standards) were set.
The following subdivision evaluation grades 0 to 3 correspond to basic evaluation criteria grades 0 to 3, subdivision evaluation criteria 6 (and 7) are basic evaluation criteria grade 4, and subdivision evaluation criteria 9 are basic evaluation criteria. Equivalent to grade 5.

Segmentation criteria:
Grade 0: The entire jaw is smooth.
Grade 1: A shape in which a slight downward bulge is observed in the jaw.
Grade 2: A shape in which a step is recognized at the front of the bulge of the jaw.
Grade 3: A shape in which the bulge of the jaw is clearly bag-shaped.
Grade 4: The joint between the jaw and the neck is shifted downward, but the shape is on the upper side of the horizontal extension line passing through the lower end of the bag-like bulge of the jaw.
Grade 5: A shape in which the joint between the jaw and the neck moves further downward and is on a horizontal extension line passing through the lower end of the jaw-like bag-like bulge.
Grade 6: A shape in which the joint between the jaw and the neck shifts downward (but above the center of the neck) from the horizontal extension line passing through the lower end of the bag-like bulge of the jaw.
Grade 7: A shape in which the joint between the jaw and the neck is shifted below the horizontal extension line passing through the lower end of the jaw-like bulge and below the center point of the neck.
Grade 8: The joint between the chin and neck moves below the horizontal extension line passing through the lower end of the sack-like bulge and below the center point of the cervix, and the boundary between the chin and neck is unclear The shape that became.
Grade 9: The shape where it is difficult to distinguish the boundary between the jaw and the neck because the joint between the jaw and the neck moves downward from the horizontal extension line passing through the lower end of the bag-like bulge.

  Grades 4, 5, 7, and 8 added in the subdivision evaluation criteria fall under the age of 40s to 60s, especially when the sagging of the jaw becomes noticeable. Makes it possible to make a detailed evaluation of people of that age.

For example, as a result of evaluation by the method of the present invention, for a subject classified into a grade higher than the actual age, cosmetic treatment for improving sagging of the jaw (makeup, cosmetic treatment, medication, cosmetic surgery, etc.) It is also possible to propose.
Moreover, the effectiveness of the said beauty treatment can also be objectively evaluated by implementing the evaluation method of this invention before and after such a beauty treatment.

Example 1
For 102 subjects in their 20s to 60s, the shape of the neck from the jaw was photographed with a camera from the side (straight side) in the sitting position. The obtained images of each subject and the basic evaluation criteria (grades 0 to 5) were compared and classified into the grades that most closely matched the shapes. A graph in which the abscissa represents age and the ordinate represents the number of grades is shown in FIG.
As shown in FIG. 3, the age and the number of grades are statistically significant (p <0.01), and the evaluation criteria employed in the present invention are from young people in their 20s to their 60s. It can be seen that it accurately reflects the progress of the sagging of the jaw with age.

(Example 2)
The subjects of 51 females in their 30s to 40s were classified into grades 0 to 5 where the sagging of the jaw was evaluated in the same manner as in Example 1. Subsequently, the body fat percentage and the body skeletal muscle percentage of each subject were measured by the impedance method.
The graph which plotted the grade number (vertical axis) of the sagging of the jaw with respect to the body fat percentage and the body skeletal muscle percentage (horizontal axis) of each subject is shown in FIGS. From these figures, it can be seen that the number of grades of sagging in the jaw has a positive correlation with the body fat percentage and a negative correlation with the body skeletal muscle percentage, which are statistically significant. .

  In women of the same age, when the body fat percentage is high and the body skeletal muscle percentage is low, sagging of the jaw tends to proceed more easily, which is consistent with conventional knowledge (for example, Patent Document 1). reference). That is, the evaluation method for sagging of the jaw according to the present invention is an appropriate evaluation method that can obtain a reasonable result even in light of conventional knowledge.

  The present invention elucidates for the first time how the sagging of the jaw progresses with age, and provides an objective standard for determining the progress of the sagging of the jaw based on that knowledge. Therefore, the evaluation method according to the present invention can be used effectively in, for example, beauty consulting because it can objectively determine the coincidence / non-coincidence between the age of the subject and the progress of the sagging of the jaw. In addition, by performing the evaluation method of the present invention before and after various cosmetic treatments relating to sagging of the jaw, it can be used for qualifying the effectiveness of the cosmetic treatment.

Claims (4)

The steps of observing the shape of the neck from the side of the subject's jaw from the side, and the evaluation criteria of the following grades 0 to 5 for the shape of the neck from the jaw observed from the side:
Grade 0: the entire jaw is smooth;
Grade 1: A shape in which slight downward bulging is observed in the jaw;
Grade 2: A shape with a step on the front of the bulge of the jaw;
Grade 3: The shape of the bulge of the jaw clearly in a bag shape;
Grade 4: The shape in which the joint between the jaw and the neck transitions downward from the horizontal extension line passing through the lower end of the jaw-like bulge;
Grade 5: A shape in which the joint between the jaw and the neck shifts downward from the horizontal extension line passing through the lower end of the bag-like bulge of the jaw and the boundary between the jaw and the neck is difficult to distinguish;
A method of evaluating jaw sagging, the method including a step of classifying the grade into a grade having a shape that best matches the grade, wherein the increase in the number of grades indicates the progress of sagging of the jaw. The method according to claim 1, wherein the observing step includes imaging the neck from the jaw of the subject using a camera installed on a side surface of the subject and observing the image. The step of classifying captures the captured image into a computer, stores the characteristic shape of grade 0 to 5 or an image embodying the shape in the computer, and classifies the image using similar image search software The method of claim 2 comprising: Instead of the grade 0-5 evaluation criteria, the following grade 0-9 subdivision assessment criteria:
Grade 0: the entire jaw is smooth;
Grade 1: A shape in which slight downward bulging is observed in the jaw;
Grade 2: A shape with a step on the front of the bulge of the jaw;
Grade 3: The shape of the bulge of the jaw clearly in a bag shape;
Grade 4: Shape where the joint between the jaw and the neck has moved downward, but is above the horizontal extension line passing through the lower end of the jaw-like bag-like bulge;
Grade 5: Shape where the joint between the jaw and neck moves further downward and is on a horizontal extension line passing through the lower end of the bag-like bulge;
Grade 6: Shape in which the joint between the jaw and neck moves below the horizontal extension line passing through the lower end of the bag-like bulge of the jaw (but above the center of the neck);
Grade 7: Shape in which the joint between the jaw and the neck transitions below the horizontal extension line passing through the lower end of the bag-like bulge of the jaw and below the center point of the neck;
Grade 8: The joint between the chin and neck moves below the horizontal extension line passing through the lower end of the sack-like bulge and below the center point of the cervix, and the boundary between the chin and neck is unclear The resulting shape;
Grade 9: The shape where the joint between the jaw and the neck moves downward from the horizontal extension line passing through the lower end of the bag-like bulge of the jaw and the boundary between the jaw and the neck is difficult to distinguish;
The method according to any one of claims 1 to 3, wherein: