Aging is natural and facial rejuvenation is the reverse process of aging. A young face has a continuation of fat distribution within and during each aesthetic unit of the face, giving it a balanced, homogenized look. The key to maintaining a youthful, rounded, smooth facial line 1, the support of effective bone tissue volume. 2, Appropriate ratio of skin, subcutaneous tissue (mainly fat) thickness and muscle strength. Three obvious arcs of the young face 1. The skin that protrudes from the surface of the frontal bone goes downward and dives into the forehead arc formed by the upper eyelid crease. 2. The mid-face curve that starts from the lower eyelid and extends to the mandible, supporting the cheeks to expand forward. 3. There is also the jaw line between the mastoid process on both sides. Gradual aging of the face of its skin and muscle changes are not very large, and the lack of subcutaneous fat tissue capacity makes the forehead, eyebrow and the middle of the face of the disappearance of the protrusion of the skin is relatively too much, in the muscle pull and gravity to a certain direction, resulting in the face of the various parts of the face is often deviation. Either too much fat or too little fat, presenting a “valley”-like topography, with peaks indicating too much fat and valleys indicating fat atrophy. This unbalanced and discontinuous distribution of fat is one of the main culprits for the loss of roundness and regularity in facial contour. To achieve facial rejuvenation, it is necessary to remove the excess and replenish the deficiency. Cosmetic injections mainly use a syringe as a tool to achieve facial rejuvenation and beauty by injecting biologically sourced or synthetic materials or drugs. At present, the two mainstream materials for filler injection are hyaluronic acid injection and autologous fat transplantation Nature and Function Hyaluronic acid: a kind of polymer polysaccharide widely existed in the extracellular matrix of hoof and neck tissues, which plays an important physiological function in the body of water retention, maintenance of the extracellular space, regulation of osmotic pressure, lubrication, and promotion of cellular repair. Nowadays, there are many brands of hyaluronic acid approved for marketing in China and abroad, and the publicity effect of various products is very similar, and the indications for filling are also basically the same, which makes doctors and beauty lovers have no way to choose. Generally speaking, the higher the degree of cross-linking, the larger the molecular particles, the higher the concentration of HA, the greater the coefficient of elasticity (G,) the stronger the colloidal hardness, the less likely to shift, relatively speaking, the slower its absorption, of course, its resistance to injection will be greater. Therefore products tending to this characteristic are very suitable for deep fillers in the deep dermis, subcutaneous and supraperiosteal layers, which can be used for the contouring of the face and the elimination of deeper static wrinkles. For example, to correct depressions such as cheeks and temporal areas, but also for forehead augmentation, chin augmentation and the contouring of mildly low noses, as well as to fill nasolabial folds. At the same time, the stiffer, more viscous hyaluronic acid is also an effective means of support reconstruction. Hyaluronic acid fillers in the periosteal plane can effectively improve the anterior convexity of key support areas, and the increased anterior convexity can effectively antagonize the downward movement of soft tissues and achieve an overall facial enhancement. On the contrary, the smaller the degree of cross-linking, the lower the concentration of HA, and the smaller the molecular particles, the colloidal hardness will be weaker and the absorption will be faster, so it will be suitable for shallow injections to eliminate superficial wrinkles and help the skin to retain and lock water, and there will be no palpable or visible nodules after injection. For example, the main ingredient in what we often refer to as hydralysis injection is actually non-cross-linked, low concentration, small molecule hyaluronic acid. Autologous fat filling:Sucking out the excess fat from your own waist, abdomen, thighs and other parts of the body, after appropriate treatment, fill in the face through refined injection technology multi-point multi-level injection, compared with the traditional open facelift side, autologous fat transplantation facial modification is safer, less traumatic, no scars, no foreign body, less pain. Fat grafting solves the main problem of soft tissue volume. Facial fat rebalancing combined with facial microfat suction technology are good facial rejuvenation therapies, especially for candidates who are a little bit older, with serious loss of soft tissue volume, and who require full facial filler. Adipose tissue volume is mainly maintained by adipocytes, which are mainly composed of triglycerides, so their hardness and support are weaker than hyaluronic acid. When facial aging is dominated by a decrease in bone support volume and skin laxity is not serious, in this case, we can consider supplementing relatively hard filler material (hyaluronic acid) to the important facial support points such as the arch of the eyebrow, the bridge of the nose, the temples, the chin, and the zygomatic prominence of the bony bumps, which will change the anterior convexity of these areas and thus realize the overall uplift of the face. Operation time Hyaluronic acid: easy to operate, usually completed within 30 minutes, the effect is immediately visible. Autologous fat filling: Firstly, we need to use swelling liquid fat suction technology to suck out the excess fat from our own waist, abdomen, thighs and other parts of the body, and then after centrifugation, purification, purification and some special treatments, then the treated fat will be injected into the designated areas, the whole process is around 2 hours. Maintenance of effect Hyaluronic acid: The molecular size, degree of cross-linking, concentration and so on affect the maintenance time of its effect, generally ranging from 6-12 months, more than this time need to be re-injected to maintain the effect. Autologous fat filling: the effect of maintenance and fat cell survival rate is related to the survival rate of fat grafting, fat graft survival rate varies from individual to individual, generally ranging from 30% to 90%. The survival rate of fat grafting varies from individual to individual, generally ranging from 30% to 90%. The survived fat is consistent with the original fat in the grafted area, so the effect is maintained for a long time or even permanent. If you are too worried about the uncertainty of the survival rate of fat grafting, you can also consider choosing the fat stem cell gel filler – SVF-gel, which is a new type of tissue extracted from adipose tissue by physical methods and enriched with svf cell populations and extracellular matrix, which is much more stable than fat grafting and has a much higher survival rate than fat grafting, which is generally less than 85%. The survival rate is much higher than that of fat grafting, generally not less than 85%. Post-operative recovery Hyaluronic acid: the injection can be completed within 30 minutes, with a short recovery period. Autologous fat filling: due to the fat retention rate, autologous fat grafting filler will generally be over-injected, coupled with the stress reaction caused by the surgical trauma, there will be a postoperative period of 2-4 weeks of swelling, with the subsiding of the stress reaction and the absorption of the fat, the postoperative swelling will gradually dissipate. 3-6 months after the complete stabilization of the cocoon into a butterfly, and replaced by a full, delicate, youthful face. Surgical Risks Whether it is hyaluronic acid injection or fat grafting, it is important to make sure that there are no contraindications to treatment before the procedure. Both fat grafting and hyaluronic acid carry the risk of vascular embolism, but in the event that the hyaluronic acid clogs a blood vessel or the results are unsatisfactory, it can be rescued by using hyaluronic acid lysozyme. And autologous fat filling is demanding for doctors and environment, more sessions than hyaluronic acid injection and more technical. Whether injecting hyaluronic acid or autologous fat, please remember to choose a regular medical institution and a doctor who is familiar with the anatomical level of the face and the location of blood vessels! Summarize Different nature of hyaluronic acid has different applications, so it is not only very good for filling small facial wrinkles and part of the folds, such as inter-brow, periorbital, perioral fine wrinkles, etc., but also very effective for deep static wrinkles, and can also be used for local contouring and facial lifting, coupled with its quick and easy operation, short-term postoperative recovery, it is therefore ideal for the small parts of the face that do not have a lot of soft tissue loss, filling, and are willing to repeatedly fill in the face. The filler of the face, and is willing to repeatedly replenishment of the candidates. In case of serious soft tissue loss, we recommend autologous fat grafting, especially for full face filling. The surgical operation, postoperative recovery, and surgical risk are more complicated than hyaluronic acid injection, so customers should make sure they have enough time and wait patiently for the postoperative recovery, and the full-face fat grafting sometimes needs to use hyaluronic acid filler to improve the support of the face, in order to achieve a more beautiful and more natural effect.