Cosmetic method for treating nail detachment or thickening

Abstract

A cosmetic method for addressing nail detachment or thickening, comprising the following steps: Step 1: creating a demarcation on the nail; Step 2: removing the detached or thickened portion; Step 3: applying a liquid formulation. Figure for the abbreviation: Fig. 1

Description

Title of the invention: Cosmetic method for treating nail detachment or thickening

[0001] The invention relates to the technical field of cosmetic methods. More specifically, the invention relates to the technical field of cosmetic methods applicable to fingernails (sometimes also referred to as "fingers" without further specification) and toenails (sometimes also referred to as "toes").

[0002] The nail is an important structure that covers the end of the fingers and toes, providing in particular a cosmetic appearance that can be positive or negative.

[0003] Since antiquity, nails have been considered an important element of human aesthetics and refinement.

[0004] Thus, in ancient cultures, nails were often dyed with natural pigments, such as henna or gold powder, to make them more attractive.

[0005] The Egyptians also used false nails made of gold and silver to signal their high social status.

[0006] Later, during the Renaissance, long, pointed nails became fashionable, and aristocrats used false nails made of porcelain and ivory for this purpose.

[0007] Over time, nail care has become more sophisticated, with the introduction of nail polish and modern manicure techniques.

[0008] Nowadays, manicures have become a common beauty ritual in Western culture.

[0009] It is in this context that having nails with a degraded appearance compared to a normal nail is likely to particularly affect a person's social image.

[0010] One of the most unsightly conditions is nail detachment, also called "nail detachment" or "onycholysis". For the purposes of this description, the lack of adhesion of the nail plate to the nail bed is also included in the term "nail detachment" or "onycholysis".

[0011] Nail detachment is a common disorder characterized by the fact that the nail detaches partially or completely from the underlying nail bed.

[0012] It causes a very unsightly appearance of the nail, which affects the aesthetics of the people affected.

[0013] The causes of nail detachment can be varied: repeated trauma, exposure to chemicals, genetic factors, symptom of another condition, environmental aggressions, etc.

[0014] Currently, cosmetic treatment of nail detachment is very inadequate.

[0015] Topical or oral treatment may be recommended.

[0016] Most of these methods have drawbacks, such as undesirable side effects, prolonged recovery times, and limited effectiveness. Obviously, with these treatments, the cosmetic result is not immediate.

[0017] Nail thickening is also a common disorder characterized by the nail becoming thicker than normal. This can be due to mechanical trauma.

[0018] For the purposes of this description, a portion of the nail that is both detached and thickened will be considered as "detached". Therefore, for the purposes of this description, a "thickened" portion of the nail is a portion of the nail that is thickened but not detached.

[0019] There is a real technical prejudice that the detached part of the nail should not be removed, even though it is made up of dead cells which will eventually be eliminated naturally or by removal by the person concerned themselves.

[0020] Such a withdrawal is often perceived, wrongly, as presenting a risk of further damaging the nail bed, or of prolonging the aesthetic improvement time.

[0021] Sometimes even, the detached part of the nail is considered, wrongly, as a kind of "natural dressing" which would be likely to protect the nail bed and facilitate aesthetic improvement.

[0022] Furthermore, clients who are scheduled to undergo removal of detached or thickened parts of the nail expect that this procedure will be, on the one hand, very painful, and on the other hand, likely to result in an immediate outcome that is much less aesthetically pleasing than before the procedure. This is not the case.

[0023] In the publication “Malan et al., Onycholysis an early indicator of thyroid disease, Pan African Medical Journal. 2019;32:31”, it is disclosed in the introductory section that onycholysis causes an unsightly effect. This publication does not, however, consider removing the detached portion of the nail.

[0024] Surprisingly, the applicant revealed that these prejudices were completely unfounded.

[0025] Surprisingly, the applicant revealed that clients treated by removal of the detached or thickened part of the nail could benefit from an immediate and highly satisfactory cosmetic improvement.

[0026] Indeed, the applicant has revealed that a finger or toe with a nail having a detached or thickened part that has not been removed is much more unsightly than a finger or toe with a nail having a detached or thickened part that has been removed.

[0027] Finally, it was also revealed by the applicant that the removal of the detached or thickened portion of the nail causes absolutely no pain. In fact, once the detached or thickened portion is removed, the underlying "newly grown" nail is relatively aesthetically pleasing.

[0028] The invention thus relates to a cosmetic method for addressing nail detachment or thickening, comprising at least the following steps:

[0029] Step 1: creating a delimitation on said nail;

[0030] Step 2: removal of said detached or thickened part of said nail;

[0031] Step 3: application of a liquid formulation.

[0032] In one embodiment, the method is a cosmetic method for addressing nail detachment.

[0033] In one embodiment, the method is a cosmetic method for addressing nail thickening.

[0034] In one embodiment, said formulation is a cosmetic formulation.

[0035] In one embodiment, said detachment or thickening is located in a region of the nail chosen from the group consisting of the matrix region, a disto-lateral region, the median region, the distal region, and several of these regions.

[0036] In one embodiment, said detachment or thickening is located in a region of the nail chosen from the group consisting of the matrix region, a disto-lateral region, the median region, the distal region.

[0037] In one embodiment, said detachment or thickening is located in a region of the nail selected from the group consisting of a disto-lateral region, the median region, the distal region, and several of these regions.

[0038] In one embodiment, said detachment or thickening is located in at least one of the disto-lateral regions.

[0039] In one embodiment, said detachment or thickening is located in the median region.

[0040] In one embodiment, said detachment or thickening is located in the distal region.

[0041] In one embodiment, said detachment or thickening covers a region of the nail corresponding to at least one of the following regions: one of the disto-lateral regions, median region, distal region.

[0042] In one embodiment, said detachment or thickening covers a region of the nail corresponding to at least two of the following regions: one of the disto-lateral regions, median region, distal region.

[0043] In one embodiment, said detachment or thickening covers a region of the nail corresponding to at least three of the following regions: one of the disto-lateral regions, median region, distal region.

[0044] In one embodiment, said detachment or thickening corresponds to an area of ​​between approximately 0.12 square centimeters and approximately 2.45 square centimeters, preferably between approximately 0.25 square centimeters and approximately 2.33 square centimeters, preferably between approximately 0.37 square centimeters and approximately 2.21 square centimeters, preferably between approximately 0.49 square centimeters and approximately 2.08 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.96 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.84 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.71 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.59 square centimeters, preferably between approximately 0.74 square centimeters and approximately 1.47 square centimeters, preferably between approximately 0,86 square centimeters and approximately 1.35 square centimeters, preferably between approximately 0.86 square centimeters and approximately 1.22 square centimeters, preferably between approximately 0.98 square centimeters and approximately 1.22 square centimeters. Addressing a detachment or thickening corresponding to an area of ​​1.10 square centimeters is particularly advantageous; aesthetically, the client is particularly satisfied.

[0045] In one embodiment, said nail is the big toenail and said detachment or thickening corresponds to an area of ​​between approximately 0.12 square centimeters and approximately 2.45 square centimeters, preferably between approximately 0.25 square centimeters and approximately 2.33 square centimeters, preferably between approximately 0.37 square centimeters and approximately 2.21 square centimeters, preferably between approximately 0.49 square centimeters and approximately 2.08 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.96 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.84 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.71 square centimeters, preferably between approximately 0.61 square centimeters and approximately 1.59 square centimeters, preferably between approximately 0.74 square centimeters and approximately 1.47 square centimeters,preferably between approximately 0.86 square centimeters and approximately 1.35 square centimeters, preferably between approximately 0.86 square centimeters and approximately 1.22 square centimeters, preferably between approximately 0.98 square centimeters and approximately 1.22 square centimeters. Addressing a detachment or thickening corresponding to an area of ​​1.10 square centimeters is particularly advantageous; aesthetically, the client is particularly satisfied.

[0046] In one embodiment, said detachment or thickening corresponds to a percentage of the area of ​​said nail of between about 4% and about 84%, preferably between about 9% and about 80%, preferably between about 13% and about 75%, preferably between about 17% and about 71%, preferably between about 21% and about 67%, preferably between about 21% and about 63%, preferably between about 21% and about 58%, preferably between about 21% and about 54%, preferably between about 25% and about 50%, preferably between about 29% and about 46%, preferably between about 29% and about 42%, preferably between about 33% and about 42%. Treating a detachment or thickening corresponding to an area of ​​38% is particularly advantageous; aesthetically, the client is particularly satisfied.

[0047] In one embodiment, said nail is a fingernail or toenail.

[0048] Preferably, it is a toenail. Indeed, nail deformities more often affect toenails than fingernails.

[0049] Preferably, the toenail concerned is the big toenail. Indeed, nail deformities affecting toenails are frequent and particularly unsightly.

[0050] The following embodiments relate to step 1.

[0051] In one embodiment, the delimitation is carried out by the use of a tool chosen from the group consisting of a material deposition means and an engraving means, preferably an engraving means.

[0052] The material deposit means means any means capable of disposing of ink or any other material, for the purpose of making said delimitation visible to the human eye.

[0053] Said material depositing means can be chosen from the group consisting of a pen, a felt-tip pen and a pencil.

[0054] The engraving means means any means capable of removing material from the nail, with the aim of making the delimitation visible to the human eye.

[0055] Said engraving means may be selected from the group consisting of a blade, nail clippers, a point and a cutter, preferably a cutter. Said cutter may be mounted on a rotation-inducing instrument selected from the group consisting of a turbine and a contra-angle.

[0056] When an engraving means is used, the engraving depth is preferably less than approximately 2 millimeters, preferably less than approximately 1.8 millimeters, preferably less than approximately 1.6 millimeters, preferably less than approximately 1.4 millimeters, preferably less than approximately 1.2 millimeters, preferably less than approximately 1 millimeter, preferably less than approximately 0.8 millimeters, preferably less than about 0.6 millimeters, preferably less than about 0.4 millimeters, preferably less than about 0.2 millimeters.

[0057] In one embodiment, the ratio of the depth of the engraving to the total thickness of the nail at the level of said engraving is between 0.22 and 0.95, preferably between 0.28 and 0.89, preferably between 0.28 and 0.83, of preferably between 0.28 and 0.78, preferably between 0.28 and 0.73, of preferably between 0.34 and 0.67, preferably between 0.39 and 0.62, of preferably between 0.39 and 0.56, preferably between 0.44 and 0.56.

[0058] Indeed, it is sufficient that the engraving makes the boundary visible to the human eye. There is no need to apply a deep engraving during this step 1, since its purpose is simply to make the boundary visible.

[0059] The detached or thickened portion of the nail consists of dead cells. In one embodiment, said delimitation is formed only at the level of the detached or thickened portion. This means that the thickness of the delimitation, for example of the engraving, is located exclusively within the dead cells of the detached or thickened portion.

[0060] The following embodiments relate to step 2.

[0061] The detached or thickened part consists solely of dead cells.

[0062] In one embodiment, said removal of the detached or thickened part is carried out by an instrument chosen from the group consisting of a milling cutter and / or a blade.

[0063] Said milling cutter is preferably mounted on an instrument chosen from the group consisting of turbines and contra-angles.

[0064] In a preferred embodiment, a milling cutter is used. This has a number of advantages.

[0065] In terms of precision, the burr provides high precision which makes it possible to remove the detached or thickened part of the nail without damaging the surrounding tissues.

[0066] In terms of speed, using a burr to remove the detached or thickened part of the nail is generally faster.

[0067] Finally, the strawberries are sterilized before each use.

[0068] In a preferred embodiment, a milling cutter and a blade are used.

[0069] In a preferred embodiment, a milling cutter, a blade and nail clippers are used.

[0070] In a preferred embodiment, a milling cutter and nail clippers are used.

[0071] This also offers a number of advantages. The combination of these instruments makes it possible to effectively remove the detached or thickened part of the nail. In addition, the procedure can be faster.

[0072] In a preferred embodiment, once the detached or thickened portion of the nail has been removed, the nail thickness is reduced to zero at the level of the delimitation. This method is preferred because it produces a particularly aesthetic result. Indeed, the aesthetic outcome is often similar to that of a nail that has never had a detached or thickened section, but which has been cut too short.

[0073] In one embodiment, another step is carried out between step 2 and step 3. It is referred to as "step 2'" in the context of this description.

[0074] The following embodiments relate to step 2'. This step 2' consists of performing an onychoplasty.

[0075] Onychoplasty is a procedure which involves the application of a formulation comprising polymers in place of the part of the nail which has been removed.

[0076] In one embodiment, said formulation comprising polymers is chosen from the group consisting of acrylic resins, epoxy resins and UV gels.

[0077] In one embodiment, said formulation comprising polymers is chosen from the group consisting of acrylic resins and epoxy resins.

[0078] In a preferred embodiment, the resin used is a photopolymerizable resin, preferably of the SDI luna type.

[0079] In one embodiment, prior to the application of the formulation comprising polymers, an adhesive is disposed.

[0080] The following embodiments relate to step 3.

[0081] In one embodiment, said formulation is lipophilic. This is advantageous because lipophilic compounds enter the crevices of the nail, which improves its aesthetics (uniform "wet" appearance, without the presence of water) and its shine, and allows for a nourished and revitalized appearance.

[0082] In a preferred embodiment, the application is carried out on the entire nail. This makes it possible to obtain a very uniform aesthetic result between the part that has been detached or thickened and the other part of said nail.

[0083] In one embodiment, said formulation comprises less than approximately 3% water, preferably less than approximately 2.8% water, preferably less than approximately 2.6% water, preferably less than approximately 2.4% water, preferably less than approximately 2.2% water, preferably less than approximately 2.0% water, preferably less than approximately 1.8% water, preferably less than approximately 1.6% water, preferably less than approximately 1.4% water, preferably less than approximately 1.2% water, preferably less than approximately 1.0% water, preferably less than approximately 0.8% water, preferably less than approximately 0.6% water, preferably less than approximately 0.4% water, preferably less than approximately 0.3% water, preferably less than approximately 0.2% water, preferably less than about 0.1% water, by mass relative to the total mass of said formulation.

[0084] In one embodiment, said formulation comprises at least one, preferably at least two, preferably at least three, preferably at least four, preferably at least five, preferably at least six, preferably at least seven, preferably eight compound(s) selected from the group consisting of macadamia seed oil (Macadamia Integrifolia Seed Oil), sunflower seed oil (Helianthus Annuus Seed Oil), St. John's wort flower / leaf / stem extract (Hypericum Perforatum Flower / Leaf / Stem Extract), soybean oil (Glycine Soja Oil), tocopherol (Tocopherol), limonene (Limonene), linalool (Linalool), and citral (Citral). Preferably, the compounds mentioned in this paragraph, when present, are at decreasing concentrations in the direction of reading this paragraph.

[0085] In one embodiment, said formulation comprises at least one, preferably at least two, preferably at least three, preferably four compound(s) selected from the group consisting of macadamia seed oil (Macadamia Integrifolia Seed Oil), sunflower seed oil (Helianthus Annuus Seed Oil), St. John's wort flower / leaf / stem extract (Hypericum Perforatum Flower / Leaf / Stem Extract), and soybean oil (Glycine Soja Oil). Preferably, the compounds mentioned in this paragraph, when present, are present in decreasing concentrations in the direction of reading this paragraph.

[0086] This is advantageous because it allows, in particular, better preservation and better penetration of said formulation into the crevices of the nail, which improves the appearance of the nail.

[0087] In one embodiment, said formulation is applied at a rate of between 1 and 5 times per day, preferably between 1 and 4 times per day, preferably between 1 and 3 times per day, preferably between 1 and 2 times per day, preferably 2 times per day. This rate is optimal for maintaining an optimal aesthetic appearance of the nail, without staining and without the applications being too difficult for the client to manage.

[0088] In one embodiment, said formulation is applied for a period of between approximately 4 and approximately 210 days, preferably between approximately 8 and approximately 189 days, preferably between approximately 13 and approximately 168 days, preferably between approximately 17 and approximately 147 days, preferably between approximately 21 and approximately 126 days, preferably between approximately 25 and approximately 105 days, preferably between approximately 29 and approximately 84 days, preferably between approximately 29 and approximately 63 days, preferably between approximately 34 and approximately 54 days, preferably between approximately 34 and approximately 50 days, preferably between approximately 35 and approximately 50 days, preferably between approximately 34 and approximately 49 days, preferably between approximately 35 and about 49 days, preferably between about 36 and about 48 days, preferably between about 36 and about 48 days, preferably between about 37 and about 47 days, preferably between about 38 and about 46 days, preferably between about 38 and about 46 days, preferably between about 38 and about 46 days, preferably between about 39 and about 45 days, preferably about 42 days.

[0089] In one embodiment, the cosmetic method according to the invention is carried out by a person chosen from the group consisting of podiatrists and nail technicians.

[0090] Indeed, the method is non-invasive and does not require in-depth knowledge of nail anatomy. Furthermore, the removed parts of the nail consist exclusively of dead cells. Given that podiatrists are often less available due to their workload and the specific and specialized care they provide, a nail technician is preferred, as they are often more readily available. The appointment wait time will thus be shorter. It should be noted that, generally speaking, given the rapid growth rate of a nail, the procedure must be performed relatively urgently so that the person being treated can benefit from the full cosmetic effect for as long as possible. Description of figures

[0091] Within [Fig. 1], a toenail is shown. The different regions of the nail are represented: the matrix region (RMA), the disto-lateral regions (RDL1, RDL2), the medial region (RME) and the distal region (RDI).

[0092] In [Fig. 2], a toenail is shown having a detached portion (DP) and a non-detached portion (NDP). The delineation (DEM) made during step 1 is also shown as a dotted line.

[0093] Figure 3 shows a toenail that has undergone steps 1 and 2. The detached portion (DP) has been removed and is therefore no longer shown. The undetached portion (UDP) remains.

[0094] Examples

[0095] Example 1: Example of implementation of the method

[0096] Example 1.1: Case of customer Cl

[0097] Client Cl is a 54-year-old man who has been trail running for several years. Following several mechanical traumas, the toenail of the big toe has detached and thickened on both feet. The detached portion corresponds to the entire distal region as well as part of the distolateral and medial regions on each of the two big toes.

[0098] The detached portion is unsightly (shape, color) and also has an unpleasant odor. Due to the detachment, the toe causes pain to the client Cl in the area of ​​the undetached portion (leverage effect on the healthy parts).

[0099] The following questions are put to Cl:

[0100] - Question 1: Do you foresee that the aesthetic appearance could be improved in the end of the application of the three steps of the method?

[0101] - Answer 1: I'm rather pessimistic. I've been testing for several years now. treatments without real results;

[0102] - Question 2: Do you think the method will cause pain?

[0103] - Answer 2: Yes. Generally, my toes are quite painful when I I'm wearing shoes.

[0104] The following steps are performed on each of the two detached nails:

[0105] - A delineation is made on the nail, the detached part corresponds to approximately 1 square centimeter. This delimitation is carried out by a milling cutter mounted on a turbine. The depth of the delimitation is approximately 0.2 millimeters.

[0106] - The detached portion is removed using a milling cutter mounted on a turbine. It is then proceeded to reset to 0 using a blade.

[0107] - A liquid formulation is applied.

[0108] More specifically, the formulation used on the right hallux nail consists of the following ingredients (INCI, in descending order of presence): MACADAMIA INTEGRIFOLIA SEED OIL, HELIANTHUS ANNUUS (SUNFLOWER) SEED OIL, HYPERICUM PERFORATUM FLOWER / LEAF / STEM EXTRACT, CITRUS LIMON (LEMON) PEEL OIL, LIMONENE, OENOTHERA BIENNIS (EVENING PRIMROSE) OIL, RICINUS COMMUNIS (CASTOR) SEED OIL, ROSA CANINA FRUIT OIL, TRITICUM VULGARE (WHEAT) GERM OIL, TOCOPHEROL, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF OIL, CITRAL, PELARGONIUM GRAVEOLENS FLOWER OIL, BRASSICA CAMPESTRIS (RAPESEED) SEED OIL, LINALOOL, CITRONELLOL, GERANIOL, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF EXTRACT, GLYCINE SOYA (SOYBEAN) OIL, BENZYL ALCOHOL

[0109] The formulation used on the left hallux nail consists of the following ingredients (INCI, in descending order of presence): MACADAMIA INTEGRIFOLIA SEED OIL, HELIANTHUS ANNUUS (SUNFLOWER) SEED OIL, HYPERICUM PERFORATUM FLOWER / LEAF / STEM EXTRACT, CYMBOPOGON MARTINI OIL, GERANIOL, MELALEUCA ALTERNIFOLIA (TEA TREE) LEAF OIL, EUGENIA CARYOPHYLLUS (CLOVE) BUD OIL, EUGENOL, LINALOOL, LIMONENE, GLYCINE SOJA OIL, TOCOPHEROL, FARNESOL, CITRAL, ISOEUGENOL.

[0110] The cosmetic formulations are applied twice daily for 6 weeks.

[0111] After 6 weeks, the nails have an aesthetic appearance that has become perfectly normal.

[0112] Cl confirms that the method brought him complete aesthetic satisfaction, and that he did not experience the slightest pain during the various stages.

[0113] Example 1.2: Case of customer C2

[0114] Client C2 is a 25-year-old woman whose left big toenail is detached, brittle, and yellowing since the application and removal of semi-permanent nail polish. The detached portion corresponds to the distal region.

[0115] The following questions are posed to C2:

[0116] - Question 1: Do you foresee that the aesthetic appearance could be improved in the end of the application of the three steps of the method?

[0117] - Answer 1: I hope so, because it's true that currently the appearance of my nail is really ugly;

[0118] - Question 2: Do you think the method will cause pain?

[0119] - Answer 2: I hope not.

[0120] The following steps are performed on the detached nail:

[0121] - A delineation is made on the nail, the detached part corresponds to approximately 0.5 square centimeter. This delimitation is carried out by a milling cutter mounted on a turbine. The depth of the delimitation is approximately 0.2 millimeters.

[0122] - The detached portion is removed using a milling cutter mounted on a turbine. It is then proceeded to reset to 0 using a blade.

[0123] - onychoplasty is performed using a light-cured resin of type SDI luna.

[0124] - A liquid formulation is applied.

[0125] More specifically, the formulation used on the right hallux nail consists of the following ingredients (INCI, in descending order of presence): MACADAMIA INTEGRIFOLIA SEED OIL, HELIANTHUS ANNUUS (SUNFLOWER) SEED OIL, HYPERICUM PERFORATUM FLOWER / LEAF / STEM EXTRACT, CITRUS LIMON (LEMON) PEEL OIL, LIMONENE, OENOTHERA BIENNIS (EVENING PRIMROSE) OIL, RICINUS COMMUNIS (CASTOR) SEED OIL, ROSA CANINA FRUIT OIL, TRITICUM VULGARE (WHEAT) GERM OIL, TOCOPHEROL, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF OIL, CITRAL, PELARGONIUM GRAVEOLENS FLOWER OIL, BRASSICA CAMPESTRIS (RAPESEED) SEED OIL, LINALOOL, CITRONELLOL, GERANIOL, ROSMARINUS OFFICINALIS (ROSEMARY) LEAF EXTRACT, GLYCINE SOYA (SOYBEAN) OIL, BENZYL ALCOHOL

[0126] The formulation is applied twice daily for 6 weeks.

[0127] After 6 weeks, the nail has a perfectly normal aesthetic appearance.

[0128] C2 confirms that the method provided him with complete aesthetic satisfaction, and that he did not experience any pain during the various stages.

Claims

Demands

1. A cosmetic method for addressing nail detachment or nail thickening, comprising at least the following steps: - Step 1: creating a delineation on said nail, said delineation being created by using a tool selected from the group consisting of a material deposition means and an engraving means, preferably an engraving means; - Step 2: removing said detached or thickened portion of said nail; - Step 3: applying a liquid formulation.

2. A cosmetic method according to claim 1, characterized in that said detachment or thickening corresponds to a percentage of the area of ​​said nail of between 4% and 84%, preferably between 9% and 80%, preferably between 13% and 75%, preferably between 17% and 71%, preferably between 21% and 67%, preferably between 21% and 63%, preferably between 21% and 58%, preferably between 21% and 54%, preferably between 25% and 50%, preferably between 29% and 46%, preferably between 29% and 42%, preferably between 33% and 42%.

3. Cosmetic method according to any one of the preceding claims, characterized in that said delimitation is carried out by means of an engraving means, preferably selected from the group consisting of a blade, a nail clipper, a point and a burr, preferably a burr.

4. Cosmetic method according to claim 3, characterized in that the ratio of the depth of the engraving to the total thickness of the nail at the level of said engraving is between 0.22 and 0.95, preferably between 0.28 and 0.89, preferably between 0.28 and 0.83, preferably between 0.28 and 0.78, preferably between 0.28 and 0.73, preferably between 0.34 and 0.67, preferably between 0.39 and 0.62, preferably between 0.39 and 0.56, preferably between 0.44 and 0.

56.

5. A cosmetic method according to any one of the preceding claims, characterized in that during step 1, a zeroing of the nail thickness at the delimitation is carried out.

6. A cosmetic method according to any one of the preceding claims, characterized in that it further comprises a step 2' carried out between step 2 and step 3, and consisting of performing onychoplasty, preferably using a light-cured resin.

7. A cosmetic method according to any one of the preceding claims, characterized in that said formulation comprises at least one, preferably at least two, preferably at least three, preferably at least four, preferably at least five, preferably at least six, preferably at least seven, preferably eight compound(s) selected from the group consisting of macadamia seed oil (Macadamia Integrifolia Seed Oil), sunflower seed oil (Helianthus Annuus Seed Oil), St. John's wort flower / leaf / stem extract (Hypericum Perforatum Flower / Leaf / Stem Extract), soybean oil (Glycine Soja Oil), tocopherol (Tocopherol), limonene (Limonene), linalool (Linalool) and citral (Citral).

8. A cosmetic method according to any one of the preceding claims, characterized in that said formulation is applied at a rate of between 1 and 5 times per 24 hours, preferably between 1 and 4 times per 24 hours, preferably between 1 and 3 times per 24 hours, preferably between 1 and 2 times per 24 hours, preferably twice per 24 hours and / or for a duration of between 4 and 210 days, preferably between 8 and 189 days, preferably between 13 and 168 days, preferably between 17 and 147 days, preferably between 21 and 126 days, preferably between 25 and 105 days, preferably between 29 and 84 days, preferably between 29 and 63 days, preferably between 34 and 54 days, preferably between 34 and 50 days, preferably between 35 and 50 days, preferably between 34 and 49 days,preferably between 35 and 49 days, preferably between 36 and 48 days, preferably between 36 and 48 days, preferably between 37 and 47 days, preferably between 38 and 46 days, preferably between 38 and 46 days, preferably between 38 and 46 days, preferably between 39 and 45 days, preferably 42 days.

9. A cosmetic method according to any one of the preceding claims, characterized in that said nail is a toenail, preferably the hallux nail.

Images