Working Principle:
The core mechanism of gold microneedling is to create tiny channels in the skin’s surface using a microneedle array. This simultaneously releases radiofrequency energy to heat the dermis (depth 0.5-4mm), triggering the following physiological responses:
1. Thermal Stimulation and Collagen Regeneration: Radiofrequency energy (monopolar or bipolar mode) generates localized high temperatures (40-60°C), contracting existing collagen fibers and stimulating fibroblasts to produce new collagen, thereby improving skin laxity and wrinkles.
2. Minimally Invasive Channels: Gold-coated microneedles (0.15-0.3mm diameter, 0.5-3.5mm length) penetrate the skin vertically, creating temporary micropores that facilitate drug penetration (such as PRP, platelet-rich plasma, or vitamin C).
3. Biological Effects: Combined with a fractional pulse pattern, energy is applied only to the targeted area, minimizing thermal damage to surrounding tissue and accelerating healing.
4. Energy Type: Most devices use bipolar radiofrequency (energy circulates between needles), while some devices support monopolar mode (energy penetrates deeper).
Core Components:
Gold microneedle devices typically consist of the following key components to ensure precise and safe operation:
1. Microneedle Tip: A gold-plated, insulated or non-insulated array of 25-49 needles per array, with adjustable depth and pattern. Common types include pumping tips (drug delivery, used for scar repair) and standard radiofrequency tips.
2. Radiofrequency Generator: Generates high-frequency energy (1-2 MHz) with adjustable power (10-100 W), controlling energy density and pulse width.
3. Control System: A touchscreen interface supports parameter settings (such as energy level, needle depth, and scanning mode). An integrated AI algorithm automatically adjusts to prevent overheating.
4. Handheld Operating Head: A lightweight design connects to the guide arm and features a built-in sensor to monitor skin impedance.
5. Cooling System: Gas or contact cooling provides synchronized cooling to minimize skin discomfort.
6. Power and Safety Module: A stable power supply with an emergency stop and skin contact detection to ensure leak-free operation.
Treatment Effects and Clinical Applications:
Gold Microneedling is highly effective for a variety of skin conditions. Clinical studies have shown that after 3-5 treatments (4-6 weeks apart), the improvement rate reaches 60%-80%.
1. Acne Scars and Pores: Lightens atrophic scars, shrinks pores, and improves POSAS scores by over 50%. The pumping mode allows for drug delivery and increased penetration.
2. Wrinkles and Sagging: Stimulates collagen production, improves fine lines and enhances skin elasticity, making it suitable for anti-aging areas around the eyes and neck.
3. Stretch Marks and Hyperpigmentation: Lightens fine lines and evens skin tone, especially for early-stage stretch marks.
Other: Treats rosacea, melasma, and excessive oil secretion.
