What are dermal fillers ？
Dermal Filler:
Dermal fillers are medical cosmetic materials that are injected into the dermis or subcutaneous tissue of the skin to fill depressions, improve wrinkles, shape contours or increase skin volume, thereby achieving a rejuvenating or beautifying effect.
Unlike Botox, the main function of dermal fillers is “filling” rather than “relaxing muscles”, and they are suitable for improving static wrinkles, tissue loss or congenital contour defects.
Common types of dermal fillers Based on the ingredients and durability, dermal fillers are mainly divided into the following categories:
(1) Hyaluronic acid (HA) fillers
Features: high safety, reversible (dissolvable by hyaluronidase), natural effect.
Applicable parts: facial wrinkles (nasolabial folds, tear troughs), lips, chin, apple muscles, etc.
Maintenance time: 6 to 18 months (depending on the degree of cross-linking and metabolic rate).
(2) Collagen fillers
Features: improve skin quality and promote self-collagen regeneration, but may cause allergies (skin test required).
Applicable parts: shallow wrinkles, acne scars.
Maintenance time: 3 to 6 months.
(3) Poly-L-lactic acid (PLLA, baby face needle)
Features: stimulate collagen regeneration, gradual improvement, suitable for full facial volume enhancement.
Applicable parts: temples, cheeks, nasolabial folds and other volume loss areas.
Duration: 2~3 years.
(4) Calcium hydroxyapatite (CaHA, microcrystalline porcelain)
Features: Hard texture, suitable for deep shaping, but irreversible.
Applicable parts: Nose bridge, chin, cheekbone shaping.
Duration: 12~18 months.
(5) Polycaprolactone (PCL, girl needle)
Features: Instant filling + long-term collagen stimulation, natural gradient effect.
Applicable parts: Apple muscles, forehead, chin, etc.
Duration: 1~4 years (different models).
Functions of dermal fillers：
(1) Improve wrinkles and depressions
Static wrinkles: nasolabial folds, marionette lines, forehead lines, etc.
Depression filling: tear troughs, temples, cheeks, etc.
(2) Facial shaping and contour optimization
Lip augmentation, rhinoplasty, chin augmentation, apple muscle filling, etc.
(3) Skin rejuvenation
Stimulate collagen, improve skin quality, and enhance skin elasticity.
(4) Scar repair
Applicable to acne scars and surgical depressed scars
Pros and Cons of Dermal Fillers
Advantages
Non-surgical: less trauma, quick recovery, suitable for people who are afraid of surgery.
Immediate effect: fillers such as hyaluronic acid take effect immediately after injection.
Adjustable: some fillers (such as hyaluronic acid) can be dissolved or supplemented.
❌ Disadvantages
Non-permanent: requires regular injections (except for a few long-lasting fillers).
Possible side effects: redness, swelling, bruising, rare vascular embolism (requires professional doctor operation).
Applicable people & contraindications：
✔ Suitable for people
People with sunken faces and obvious wrinkles.
People who want to fine-tune their contours (such as rhinoplasty and lip augmentation) but do not want surgery.
People with sagging skin and collagen loss who need to increase fullness.
✖ Contraindications
Pregnant women and breastfeeding women.
People with severe allergies (especially allergies to filler ingredients).
People with local skin infections or inflammations.
People with coagulation disorders or immune system diseases.
Postoperative Care & Precautions
- Within 24 hours: avoid makeup, strenuous exercise, and high temperature environment (sauna, sun exposure).
- Within 1 week: avoid massaging the injection site to prevent displacement.
- Long-term care: Strengthen moisturizing and sun protection to prolong the effect.
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