A periorbital fine filling method based on multi-point micro-injection

Abstract

The application discloses a periorbital fine filling method based on multi-point micro-injection, and belongs to the technical field of medical cosmetology. The method comprises the following steps: region division, dividing the periorbital injection region into outer, middle and inner regions according to a three-dimensional hierarchical structure from outside to inside, and further subdividing the regions into several fine subunits according to anatomical structures; dot design, setting 3-9 linearly arranged injection points in each subunit along the tissue texture direction, and the interval between adjacent injection points is 0.1-0.3 cm; multi-point injection, adopting a tunnel type fan-shaped injection method, establishing 3-9 tunnels in different directions with a single needle entry point, the included angle between the tunnels is 15-30 degrees, and the injection filling material is evenly spread at a micro-dose of 0.01-0.08 ml at each injection point, the injection speed is 0.01-0.05 ml / s, the injection depth is set according to the difference of the corresponding hierarchical structure of the subunit, and the dose of each injection point in the same subunit is gradiently distributed; the conventional "single-point large-dose bolus injection" is upgraded to the injection method of "multi-point, micro-dose, tunnel type fan-shaped even spread", so that the filling material is evenly distributed in the tissue in the form of a thin layer, the problems of bulging, unevenness, steamed bun and the like are effectively avoided, the fine filling effect of natural, flat and lively periorbital is realized, and the risk of complications such as vascular embolism is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of cosmetic technology, and in particular to a method for refined periocular filling based on multi-point micro-injection. Background Technology

[0002] The area around the eyes is the first and most easily visibly showing signs of aging on the face. With age, a series of aging problems appear around the eyes, such as sunken tear troughs, sunken upper eyelids, drooping eyebrows, loss of under-eye bags, and fine lines. Injectable fillers are currently a common method for improving signs of aging around the eyes.

[0003] However, the existing periocular injection filling methods have the following problems: (1) Conventional injection methods are mostly single-point large-dose injections, that is, 0.5-1.0 ml or even more of filling material is injected into the depression, which is easy to form clumps and cause problems such as bulging, unevenness, and swelling; (2) The injection points are unevenly distributed, and the filling material is distributed in clumps in the tissue rather than in a uniform thin layer, resulting in an unnatural visual effect; (3) There is a lack of injection plans for the fine anatomical structure of the periocular area, and different dosage designs are not carried out for different areas; (4) Single-point large-dose injections are also prone to increasing the risk of complications such as vascular embolism; (5) There is a lack of injection plans for the fine anatomical structure of the periocular area, which is easy to cause swelling and long repair cycles. Summary of the Invention

[0004] Purpose of the invention: The purpose of this invention is to provide a method for precise periocular filling based on multi-point micro-injection, so as to solve the problems mentioned in the background art.

[0005] Technical solution: A method for refined periocular filling based on multi-point micro-injection, the method comprising the following steps:

[0006] ① Region division: The periorbital injection area is divided into several refined subunits according to the anatomical structure;

[0007] ② Injection point design: Multiple injection points are set within each subunit. The injection points are arranged linearly along the tissue texture direction, and the distance between adjacent injection points is 0.1-0.3cm.

[0008] ③ Multi-point injection: The tunnel-type fan-shaped injection method is adopted. At each injection point, a micro dose of 0.01-0.08 ml of injection filler material is evenly spread. The doses at each injection point within the same subunit may be the same or different.

[0009] Preferably, in step ①, the periocular injection area is divided into an outer dimension region, a middle dimension region, and an inner dimension region according to a three-dimensional hierarchical structure from the outside to the inside. The outer dimension region corresponds to the bony support region, the middle dimension region corresponds to the volume filling region, and the inner dimension region corresponds to the detail enhancement region.

[0010] Preferably, the outer dimension region includes the brow bone subunit, outer C subunit, nasal root subunit, nasal bridge subunit, inner apple cheek subunit, palpebral junction subunit, and inner C subunit; the middle dimension region includes the upper eyelid depression subunit, tear trough eye bag subunit, and dark circle subunit; and the inner dimension region includes the double eyelid subunit and the lower eyelid fat pad subunit.

[0011] Preferably, the refined subunit in step ① is obtained by further subdividing the periorbital area according to anatomical structure, wherein:

[0012] The outer C subunit is divided into WC1 subunit, WC2 subunit, and WC3 subunit;

[0013] The brow arch subunit is divided into M1 brow head subunit, M2 brow slope subunit, M3 brow peak subunit, M4 brow tail subunit, and Queen point subunit.

[0014] The root of the mountain is divided into the S1 subunit and the S2 subunit;

[0015] The nasal dorsum subunit is the B1 subunit;

[0016] The inner C subunit is divided into C1 subunit, C2 subunit, and C3 subunit;

[0017] The inner apple muscle subunit is divided into P1 subunit, P2 subunit, and P3 subunit.

[0018] The palpebral-zygomatic junction subunit is the J1 subunit;

[0019] The upper eyelid retraction subunit is divided into a1 subunit, a2 subunit, and a3 subunit;

[0020] The tear trough and eye bag subunit is divided into L1 subunit, L2 subunit, L3 subunit, and L4 subunit;

[0021] The double eyelid subunit is divided into C1 inner canthus subunit, C2 mid-segment double eyelid subunit, and C3 caudal segment double eyelid subunit.

[0022] The subunits for the lower eyelid (or "aegyo sal") are divided into W1, W2, and W3 subunits. Each subunit is further subdivided into multiple secondary subunits based on anatomical structure. For example, the brow bone is subdivided into M1 (brow head), M2 (brow slope), M3 (brow peak), M4 (brow tail), and the Queen point; the lower eyelid (or "aegyo sal") is subdivided into W1, W2, and W3; and the tear trough / eye bags are subdivided into L1, L2, L3, and L4. This subdivision allows for precise positioning and differentiated treatment of each subtle anatomical structure during injection. For instance, the Queen point, M3, and M4 form a triangular support to enhance stability; W2, as a mid-section highlight, can have its dosage appropriately increased; and L1 to L4 decrease gradually along the tear trough. This achieves a refined and personalized solution to periocular aging problems, avoiding the unnatural or overfilling results caused by the crude injection methods of traditional approaches.

[0023] Preferably, the dot design in step ② further includes: the number of injection points in a single subunit is 3-9, the spacing between each injection point in the same subunit is equal or unequal, and the spacing between adjacent injection points is preferably 0.1-0.3cm.

[0024] Preferably, step ③ of the tunnel-type fan-shaped injection method includes the following steps: after needle insertion, the needle is advanced along the tunnel direction to the injection point, and the filling material is evenly injected while the needle is withdrawn; starting from the needle insertion point, tunnels are established in multiple directions to form a fan-shaped, evenly spread filling material. Using the tunnel-type fan-shaped injection method, 3-9 tunnels are established at a single needle insertion point, with the angle between each tunnel and the plane of the needle insertion point being 0°-15°, and the angle between each tunnel being 15°-30°. The filling material is evenly injected while the needle is withdrawn. This method allows the filling material to be evenly spread in a fan shape at the target layer, allowing a large injection area to be covered by a single needle insertion point, significantly reducing the number of needle insertions and lowering the risk of trauma and bruising. The fan-shaped spreading method ensures that the filling material is evenly distributed in a thin layer within the tissue, rather than accumulating in clumps, effectively avoiding the bulging, unevenness, and swelling phenomena caused by traditional large-dose bolus injections. It's similar to sowing barley—several grains are sown evenly per hole, rather than dumping an entire bag of seeds into the same hole.

[0025] Preferably, in the tunnel-type fan-shaped injection method, 3-9 tunnels are established at the same injection point, with the angle between each tunnel and the plane where the injection point is located being 0°-15°, and the angle between each tunnel being 15°-30°, so that the filling material is evenly spread in a fan shape on the target layer.

[0026] Preferably, in step ③, the injection dose at each injection point is 0.01-0.08 ml, and the injection depth is determined according to the corresponding layer of the subunit: the injection depth of the periosteum is to touch the bone surface, the injection depth of the fat layer is 0.1-0.3 cm subcutaneously, and the injection depth of the dermis is 0.05-0.1 cm subcutaneously.

[0027] Preferably, in step ③, the injection dose at each injection point within the same subunit is gradient-distributed, decreasing from the center of the subunit to the edge, with a dose difference of 0.01-0.05 ml between adjacent injection points.

[0028] Preferably, the injection rate in step ③ is 0.01-0.05 ml / second.

[0029] Beneficial effects: This invention upgrades the conventional "single-point large-dose injection" method to a "multi-point, micro-volume, tunnel-type fan-shaped uniform spreading" injection method, so that the filling material is evenly distributed in a thin layer in the tissue, which can effectively avoid problems such as bulging, unevenness, and bloating caused by traditional large-dose bolus injection.

[0030] This invention controls the dosage at each injection point to 0.01-0.08 ml, with 3-9 injection points within a single subunit. The overall filling effect is achieved through the superposition of micro-volumes at multiple points. Taking the tear trough subunit as an example, if the total filling volume is 0.5 ml, traditional methods injecting 0.5 ml at a single point will inevitably form clumps. However, this method divides the injection into 3-9 points, with 0.01-0.08 ml injected at each point, resulting in a thin, evenly distributed layer within the tissue. This fills the depression without causing bulges, resulting in a natural effect.

[0031] This invention employs a tunnel-type fan-shaped injection method, which establishes tunnels in multiple directions using a single injection point, allowing the filling material to be spread evenly in a fan shape. One injection point can cover a large injection area, reducing the number of injections and lowering the risk of trauma and bruising. It is similar to sowing barley—several grains per hole, evenly scattered, rather than pouring the entire bag of seeds into the same hole.

[0032] This invention aligns the fine anatomical structure of the periorbital region with the injection protocol, setting differentiated dosages and layers for different subunits according to tissue thickness and degree of depression. For example, the inner side of the tear trough is shallower and the outer side is deeper, and the upper eyelid depression is extremely thin, requiring only 0.01-0.08ml, thus achieving precise customization.

[0033] This invention utilizes multi-point micro-injection, requiring only extremely low injection pressure at each point, which significantly reduces the probability of serious complications such as vascular embolism and greatly improves safety. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of 12 aesthetic expression points of the barley injection method of the present invention;

[0035] Figure 2 This is a schematic diagram of the external vesiculum unit of the barley injection method of the present invention;

[0036] Figure 3 This is a schematic diagram of the injection point in the barley injection method of the present invention.

[0037] Figure 4This is a schematic diagram of the intravitreal unit at the injection point of the barley injection method of the present invention.

[0038] Attached image labels: 1. Brow arch, 3. Outer C, 8. Inner C, 6. Inner apple cheek, 5. Eyelid-cheekbone junction, 9. Nasal root, 10. Nasal bridge; 7. Upper eyelid depression, 4. Tear trough and eye bags, 12. Dark circles; 2. Double eyelid, 11. Under-eye bags. Detailed Implementation

[0039] To make the technical solution of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0040] Example 1

[0041] Benru Figure 1-4 As shown in the figure, this embodiment presents a method for refined periocular filling based on multi-point micro-injection, which includes the following steps:

[0042] The first step is regional division: The periocular injection area is divided into several refined subunits according to anatomical structure. The periocular injection area is further divided into outer, middle, and inner dimensional regions according to a three-dimensional hierarchical structure from the outside in. Specifically, the outer dimensional region corresponds to the bony support area, including the brow bone subunit, outer C-unit, nasal root subunit, nasal bridge subunit, inner cheekbone subunit, palpebral-zygomatic junction subunit, and inner C-unit; the middle dimensional region corresponds to the volume filling area, including the upper eyelid hollowing subunit, tear trough and eye bag subunit, and dark circle subunit; and the inner dimensional region corresponds to the detail enhancement area, including the double eyelid subunit and the under-eye bag subunit.

[0043] The refined subunits are obtained by further subdividing the periorbital area according to anatomical structure. The subunits are as follows: the outer C subunit is divided into WC1, WC2, and WC3; the brow arch subunit is divided into M1 (brow head), M2 (brow slope), M3 (brow peak), M4 (brow tail), and Queen point; the nasal root subunit is divided into S1 and S2; the nasal dorsum subunit is B1; the inner C subunit is divided into C1, C2, and C3; the inner apple cheek subunit is divided into P1, P2, and P3; the zygomatic eyelid junction subunit is J1; the upper eyelid retraction subunit is divided into a1, a2, and a3; the tear trough and eye bag subunit is divided into L1, L2, L3, and L4; the double eyelid subunit is divided into C1 (inner canthus), C2 (mid-segment of double eyelid), and C3 (tail of double eyelid); and the lower eyelid fat pad subunit is divided into W1, W2, and W3.

[0044] The second step is injection site design: Multiple injection sites are set within each subunit. The number of injection sites within a single subunit is 3-9. The injection sites are arranged linearly along the tissue texture direction, with equal or unequal spacing between injection sites within the same subunit, and the spacing between adjacent injection sites is 0.1-0.3 cm.

[0045] The third step, multi-point injection: A tunnel-style fan-shaped injection method is used, where a small dose of filler material is evenly spread at each injection point. This method includes: after inserting the needle, advancing along the tunnel direction to the injection point, and simultaneously injecting filler material evenly while withdrawing the needle; starting from the insertion point, tunnels are established in multiple directions, forming a fan-shaped, evenly spread layer. 3-9 tunnels are established at the same insertion point, with each tunnel forming an angle of 0°-15° with the plane of the insertion point, and the angle between each tunnel being 15°-30°, ensuring the filler material is evenly spread in a fan shape across the target layer.

[0046] The injection dose at each injection point is 0.01-0.08 ml. The injection depth is determined according to the corresponding layer of the subunit: the injection depth in the periosteum is to touch the bone surface; the injection depth in the fat layer is 0.1-0.3 cm subcutaneously; and the injection depth in the dermis is 0.05-0.1 cm subcutaneously. The injection dose at each injection point within the same subunit follows a gradient distribution, decreasing from the center to the edge of the subunit, with a dose difference of 0.01-0.05 ml between adjacent injection points. The injection rate is 0.01-0.05 ml / second. The dose at each injection point within the same subunit may be the same or unequal.

[0047] Example 1: Bone support injection in the external vascular region

[0048] The outer dimension region corresponds to the bony support region, including the brow bone subunit, outer C subunit, nasal root subunit, nasal dorsum subunit, inner malar subunit, palpebral junction subunit, and inner C subunit. Injections in this region primarily use supporting materials, with the injection layers mainly consisting of the periosteum and fat layer.

[0049] I. Eyebrow arch subunit injection

[0050] The brow ridge subunit is further subdivided according to anatomical structure into M1 brow head subunit, M2 brow slope subunit, M3 brow peak subunit, M4 brow tail subunit, and Queen point subunit.

[0051] The M1 brow subunit is located at the upper edge of the brow area within the fan-shaped nasolabial fold, providing targeted support for brow drooping and improving three-dimensionality and inner corner eye sagging. The M2 brow slope subunit connects the brow height, softening the brow shape. Both M1 and M2 are injected into the fat layer using a supportive, rigid material. The M3 brow peak subunit improves three-dimensionality and reduces brow tail sagging, while the M4 brow tail subunit improves brow tail sagging and frontal brow tail depression. The Queen point subunit, located at the highest point of the isosceles triangle formed by M3 and M4, improves upper eyelid sagging and increases lateral folding, forming a triangular support with M3 and M4 for enhanced stability. The M3, M4, and Queen point subunits are injected into the periosteum layer using a supportive, rigid material.

[0052] In the injection point design, the M3 brow peak subunit has 4 injection points, the M4 brow tail subunit has 3 injection points, the M1 brow head subunit has 1 injection point, the M2 brow slope subunit has 2 injection points, and the Queen point subunit has 2 injection points, for a total of 12 injection points. These points are arranged along the brow arch, with a spacing of 0.1-0.3 cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, establishing tunnels in 3-9 directions starting from the needle entry point. The angle between each tunnel and the plane of the needle entry point is 0°-15°, and the angle between tunnels is 15°-30°. Filler material is evenly injected while withdrawing the needle, at an injection speed of 0.01-0.05 ml / second. The dosage at each injection point is gradient-distributed, decreasing from the brow peak towards both ends, with a dosage difference of 0.01-0.05 ml between adjacent injection points. After injection, the brow arch exhibits a natural bony transition, the brow tail rises, and the Queen point area transitions smoothly.

[0053] II. External C subunit injection

[0054] The outer C-unit was divided into three subunits: WC1, WC2, and WC3. The WC1 subunit was positioned in the extraorbital fossa to improve the appearance of the extraorbital fossa and increase the width of the palpebral fissure. The WC2 subunit was located approximately 0.5 cm above WC1 to improve laxity of the lateral upper eyelid and increase the width of the lateral double eyelid. The WC3 subunit was located approximately 0.5 cm below WC1 to improve laxity of the lateral lower eyelid skin. All three subunits were injected onto the periosteum using a supporting material.

[0055] When designing the injection sites, 3-5 injection points are set for each subunit, arranged along the lateral orbital margin, with a spacing of 0.1-0.3 cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, with a dose of 0.01-0.08 ml at each injection point, decreasing from the center to the edge. After injection, the palpebral fissure ablates, and the periorbital contour is smooth.

[0056] III. Subunit injection of the root of the nose

[0057] The nasal root subunit is divided into S1 and S2 subunits. The S1 subunit is located midway between the line connecting the brow and the outer corner of the eye, at the highest point of the nasal root, used to increase three-dimensionality and improve the nasofrontal angle. The S2 subunit is located lateral to the inner C-shape, at the junction of the two hard bones of the nasal dorsum, used to connect the nasal dorsum and the nasal root. Both subunits are injected onto the periosteum using a rigid material with good support.

[0058] When designing the injection sites, 2-3 injection points are set for the S1 subunit and 1-2 injection points are set for the S2 subunit, arranged along the midline of the nasal root. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08ml at each injection point. After injection, the nasal root appears three-dimensional, and the nasofrontal angle appears natural.

[0059] IV. Nasal Dorsal Subunit Injection

[0060] The nasal dorsum subunit is the B1 subunit, originating at the line connecting the inner canthi of the eye and ending at the suture between the cartilaginous and hard bone, used to enhance three-dimensionality and the integrity of the nasal dorsum. The injection depth is above the periosteum, using a rigid material with good support.

[0061] When designing the injection points, place 3-5 injection points along the midline of the nasal bridge, with a spacing of 0.1-0.3cm between adjacent injection points. Use a tunnel-style fan-shaped injection method, with a dosage of 0.01-0.08ml at each injection point, decreasing from the root of the nose towards the tip. After injection, the nasal bridge will have a smooth line and no sticky feeling.

[0062] V. Intracellular C subunit injection

[0063] The inner C-unit is divided into C1, C2, and C3 subunits. The C1 subunit connects to the lateral curve of the nasal root, reducing the "sticky" appearance. The C2 subunit connects to the brow bone, making the transition between the brow bone and the inner C-unit smoother and creating a more pleasing interplay of light and shadow. The C3 subunit connects the nasal root and the bridge of the nose, reducing the "sticky" appearance and increasing a natural, smooth feel. All three subunits are injected into the fat layer using a supportive material.

[0064] When designing the injection sites, 2-3 injection points are set for each subunit, arranged in an arc along the outer side of the inner canthus. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08 ml at each injection point. After injection, the light and shadow in the inner canthus area are natural and the transition is smooth.

[0065] VI. Inner apple muscle subunit injection

[0066] The inner cheek subunit is divided into P1, P2, and P3 subunits. The P1 subunit is not recommended for injection because it protrudes more noticeably due to ligament traction. The P2 subunit is located in the subcutaneous fat layer or on the bone surface, used for transitional connection to avoid protrusions and cord-like structures. The P3 subunit is located in the subcutaneous fat layer or on the bone surface, used to improve the position of the highlight point in the cheekbone, achieving visual repositioning. P2 and P3 are made from materials with high elastic modulus.

[0067] When designing the injection points, 2-3 injection points are set for the P2 subunit and 2-3 injection points for the P3 subunit, arranged along the inner edge of the cheekbone. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08ml at each injection point. After injection, the highlight points of the cheekbone are restored, and the face appears full and natural.

[0068] VII. Subunit injection at the zygomaticopalatal junction

[0069] The subunit at the zygomatic junction is the J1 subunit. For severe Indian lines, injection is administered onto the periosteum to avoid over-injection, which could lead to a protruding sensation or elongation of the Indian lines. For milder Indian lines, injection is administered subcutaneously using a blunt needle for dissection. Supporting materials are used.

[0070] When designing the injection points, 2-4 injection points are set along the palpebral-zygomatic groove, with a spacing of 0.1-0.3 cm between adjacent injection points. A tunnel-type fan-shaped injection method is used, with a dosage of 0.01-0.08 ml at each injection point. After injection, the palpebral-zygomatic groove is smooth, without depression.

[0071] Example 2: Volume Filling Injection in the Dimensional Region

[0072] The mid-dimensional region corresponds to the volume-filling area, including the upper eyelid hollowing subunit, tear trough and eye bag subunit, and dark circle subunit. Injections in this area primarily focus on volume replenishment, with the injection depth determined based on the specific subunit.

[0073] I. Subunit injection for upper eyelid retraction

[0074] The upper eyelid retraction subunit is divided into three subunits: a1, a2, and a3. The a1 subunit is located near the inner corner of the eye, preserving a certain degree of retraction to avoid pressing on the inner corner. The a2 subunit is located in the middle of the upper eyelid; excessive injection will cause filler to sag when the eye is closed. The a3 subunit is located near the outer corner of the eye; excessive injection will press on the outer corner. All three subunits use pure collagen without any coagulants.

[0075] When designing the injection site layout, 2-3 injection points are set for each subunit, arranged along the upper eyelid crease, with a spacing of 0.1-0.3 cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08 ml at each injection point, decreasing from the center to the edge. After injection, upper eyelid hollowing is improved, the eyes appear bright when open, and no filler is squeezed out when the eyes are closed.

[0076] II. Subunit Injection for Tear Trough and Eye Bags

[0077] The tear trough and under-eye bag subunits are divided into L1, L2, L3, and L4 subunits, arranged along the tear trough. Injection is performed deep above the periosteum or under the orbicularis oculi muscle, using either collagen or hyaluronic acid.

[0078] In the injection site design, 3-4 injection points are set for each subunit, for a total of 12 injection points, arranged along the tear trough, with a spacing of 0.1-0.3cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08ml at each injection point, decreasing from the center to the edge. After injection, the tear trough is smooth, and the under-eye bag area transitions smoothly without bulges or unevenness.

[0079] III. Subunit Injection for Dark Circles

[0080] The injection regimen for dark circles is selected based on the type. Vascular dark circles primarily require deep support, with injections placed in the deep periosteum or under the orbicularis oculi muscle. Pigmented dark circles primarily require superficial coverage, using collagen to lighten and improve the appearance. Structural dark circles primarily require deep support, with a combined deep and superficial treatment. Mixed dark circles address both deep support and superficial skin texture improvement; a combined treatment approach yields the best results, using a combination of collagen and hyaluronic acid injections.

[0081] When designing the injection points, 3-6 points are set according to the type of dark circles, arranged along the lower eyelid margin. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08ml at each injection point. After injection, dark circles are significantly lightened, and the skin tone around the eyes becomes more even.

[0082] Example 3: Injection for Detail Enhancement in Inner Vein Area

[0083] The inner lining area corresponds to the detail enhancement area, including the double eyelid subunit and the lower eyelid subunit. Injections in this area focus on fine-tuning, with shallow injection depth and precise dosage.

[0084] I. Subunit injection for double eyelid surgery

[0085] The double eyelid subunits are divided into C1 (inner canthus subunit), C2 (mid-segment double eyelid subunit), and C3 (tail-segment double eyelid subunit). The C1 inner canthus subunit is used to widen the inner arc of the double eyelid. The C2 mid-segment double eyelid subunit is the highlight point of the double eyelid, used to increase its width and connect to the inner canthus. The C3 tail-segment double eyelid subunit is used to improve the width of the double eyelid and increase its liveliness. All three subunits are injected subcutaneously using a mixture of hyaluronic acid and collagen.

[0086] When designing the injection points, each subunit has 2-3 injection points arranged along the double eyelid crease, with a spacing of 0.1-0.3cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08ml at each injection point. After injection, the double eyelid width increases, the inner corner of the eye connects smoothly, and the eye shape becomes more lively.

[0087] II. Subunit injection of the lateral canthus

[0088] The aegyo sal (eye bags) subunit is divided into three subunits: W1, W2, and W3. The W1 subunit is located at the vertical line connecting the inner and outer sides of the iris, appearing as a crescent shape. The W2 subunit is located at the vertical line connecting the outer and outer sides of the iris, appearing as a slightly raised highlight. The W3 subunit is located in the remaining sclera (white of the eye), transitioning seamlessly with the W2 subunit. All three subunits utilize a mixture of hyaluronic acid and collagen.

[0089] In the injection site design, there are 2 injection points for the W1 subunit, 3 injection points for the W2 subunit, and 1 injection point for the W3 subunit, for a total of 6 injection points, arranged along the root of the eyelashes, with a spacing of 0.1-0.3 cm between adjacent injection points. A tunnel-style fan-shaped injection method is used, with a dosage of 0.01-0.08 ml at each injection point. The dosage is slightly higher in the middle of W2 and slightly lower at the ends of W1 and W3. After injection, the lower eyelid shows a natural arc, almost invisible when not smiling, and naturally bulges out when smiling, vertically increasing the width of the palpebral fissure and helping to reduce lower eyelid sagging and fine lines.

[0090] Example 4: Comprehensive Periocular Refined Filling

[0091] The patient, 35 years old, presented with comprehensive periorbital aging, including drooping eyebrow tails, sunken tear troughs, missing lower eyelid puffiness, sunken upper eyelids, and mild dark circles. Comprehensive treatment was performed according to the method described in this invention.

[0092] First, the area around the eyes is divided into three regions: the outer 3D region, the middle 3D region, and the inner 3D region. The outer 3D region includes the brow bone subunit, the outer C-unit, and the inner C-unit. The middle 3D region includes the upper eyelid crease subunit and the tear trough / eye bag subunit. The inner 3D region includes the lower eyelid puffiness subunit.

[0093] In the brow bone region, the brow bone subunit is further subdivided into M1, M2, M3, M4 and Queen point subunits, with a total of 12 injection points. High molecular weight hyaluronic acid is used for injection into the periosteum layer. The dosage of M3 and M4 is slightly higher, while the dosage of M1 and Queen point is slightly lower, decreasing from the brow peak towards both ends.

[0094] In the outer C region, the outer C subunit is further subdivided into WC1, WC2, and WC3 subunits, with a total of 9 injection points. Supporting materials are used for intraperiosteal injection.

[0095] In the upper eyelid depression area, the upper eyelid depression subunit is further subdivided into a1, a2, and a3 subunits, with a total of 6 injection points. Pure collagen is used, and the injection layer is the subcutaneous fat layer, with each subunit retaining a slight depression.

[0096] In the tear trough area, the tear trough eye bag subunit is further subdivided into L1, L2, L3, and L4 subunits, with a total of 12 injection points. Collagen is injected deep into the periosteum.

[0097] In the area of ​​the lower eyelid, the lower eyelid subunit is further subdivided into W1, W2, and W3 subunits, with a total of 6 injection points. Hyaluronic acid and collagen are mixed materials and injected into the subcutaneous layer, with a slightly higher dose in the middle of W2.

[0098] All subunits are injected using a tunnel-style fan-shaped injection method. Starting from the injection point, tunnels are created in 3-9 directions. The angle between each tunnel and the plane containing the injection point is 0°-15°, and the angle between each tunnel is 15°-30°. The filling material is injected evenly while the needle is withdrawn. The injection speed is 0.01-0.05 ml / second, the dose at each injection point is 0.01-0.08 ml, the distance between adjacent injection points is 0.1-0.3 cm, and the dose at each injection point within the same subunit is gradient-distributed, decreasing from the center to the edge. The dose difference between adjacent injection points is 0.01-0.05 ml.

[0099] Immediately after the injection, the brow bone showed a natural transition, the brow tail was lifted, the outer C-shaped contour was smooth, the upper eyelid hollowing was improved and the eyes looked bright and alert, the tear trough was smooth without any bumps, and the lower eyelid had a natural and lively curve. A follow-up visit on the 14th day after the procedure revealed that the patient reported an overall more youthful appearance around the eyes, a natural effect, and no signs of smudged skin.

[0100] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for precise periocular filling based on multi-point micro-injection, characterized in that: The method includes the following steps: ① Region division: The periorbital injection area is divided into several refined subunits according to the anatomical structure; ② Injection point design: Multiple injection points are set within each subunit. The injection points are arranged linearly along the tissue texture direction, and the distance between adjacent injection points is 0.1-0.3cm. ③ Multi-point injection: The tunnel-type fan-shaped injection method is adopted. At each injection point, a micro dose of 0.01-0.08 ml of injection filler material is evenly spread. The doses at each injection point within the same subunit may be the same or different.

2. The method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, In step ①, the injection area around the eyes is divided into an outer dimension, a middle dimension, and an inner dimension according to a three-dimensional hierarchical structure from the outside to the inside. The outer dimension corresponds to the bony support area, the middle dimension corresponds to the volume filling area, and the inner dimension corresponds to the detail enhancement area.

3. The method for refined periocular filling based on multi-point micro-injection according to claim 2, characterized in that, The outer dimension region includes the brow bone subunit, outer C subunit, nasal root subunit, nasal bridge subunit, inner apple cheek subunit, palpebral junction subunit, and inner C subunit; the middle dimension region includes the upper eyelid depression subunit, tear trough eye bag subunit, and dark circle subunit; the inner dimension region includes the double eyelid subunit and lower eyelid fat pad subunit.

4. The method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, In step ①, the refined subunits are obtained by further subdividing the periorbital area according to anatomical structure, wherein: The outer C subunit is divided into WC1 subunit, WC2 subunit, and WC3 subunit; The brow arch subunit is divided into M1 brow head subunit, M2 brow slope subunit, M3 brow peak subunit, M4 brow tail subunit, and Queen point subunit. The root of the mountain is divided into the S1 subunit and the S2 subunit; The nasal dorsum subunit is the B1 subunit; The inner C subunit is divided into C1 subunit, C2 subunit, and C3 subunit; The inner apple muscle subunit is divided into P1 subunit, P2 subunit, and P3 subunit. The palpebral-zygomatic junction subunit is the J1 subunit; The upper eyelid retraction subunit is divided into a1 subunit, a2 subunit, and a3 subunit; The tear trough and eye bag subunit is divided into L1 subunit, L2 subunit, L3 subunit, and L4 subunit; The double eyelid subunit is divided into C1 inner canthus subunit, C2 mid-segment double eyelid subunit, and C3 caudal segment double eyelid subunit. The subunit of the silkworm is divided into W1 subunit, W2 subunit, and W3 subunit.

5. A method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, The dot design in step ② further includes: the number of injection points in a single subunit is 3-9, the spacing between each injection point in the same subunit is equal or unequal, and the spacing between adjacent injection points is preferably 0.1-0.3cm.

6. The method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, The tunnel-type fan-shaped injection method in step ③ includes the following steps: after inserting the needle, it travels along the tunnel direction to the injection point, and while withdrawing the needle, it evenly pushes the filling material; with the needle insertion point as the starting point, tunnels are established in multiple directions to form a fan-shaped uniform spread.

7. A method for refined periocular filling based on multi-point micro-injection according to claim 6, characterized in that, In the tunnel-type fan-shaped injection method, 3-9 tunnels are established at the same injection point. The angle between each tunnel and the plane where the injection point is located is 0°-15°, and the angle between each tunnel is 15°-30°, so that the filling material is evenly spread in a fan shape on the target layer.

8. The method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, In step ③, the injection dose at each injection point is 0.01-0.08 ml, and the injection depth is determined according to the corresponding layer of the subunit: the injection depth of the periosteum is to touch the bone surface, the injection depth of the fat layer is 0.1-0.3 cm subcutaneously, and the injection depth of the dermis is 0.05-0.1 cm subcutaneously.

9. A method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, In step ③, the injection dose at each injection point within the same subunit is distributed in a gradient, decreasing from the center of the subunit to the edge, with a dose difference of 0.01-0.05 ml between adjacent injection points.

10. A method for refined periocular filling based on multi-point micro-injection according to claim 1, characterized in that, In step ③, the injection rate is 0.01-0.05 ml / second.

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