What Is Solid Microneedle Therapy – Definition, Features And Industrial Value

https://en.wikipedia.org/wiki/Microneedles

Solid microneedle therapy is the most original and mainstream technical form of microneedle therapy, referring to the minimally invasive treatment technology using solid non-drug-loaded microneedle arrays for physical skin channeling and skin activation. Solid microneedles are made of high-hardness medical stainless steel or monocrystalline silicon, with complete solid needle body structure, smooth surface and strong mechanical stability. Different from dissolvable and hollow microneedles, solid microneedle therapy mainly relies on physical puncture to build skin microchannels, and cooperates with external skin care essence or medicinal liquid to complete transdermal absorption and treatment. After decades of technical iteration, solid microneedle therapy has become the most mature, widely used and cost-effective microneedle technology, occupying the main market share of medical aesthetics and clinical skin treatment.

The working principle of solid microneedle therapy is physical barrier penetration combined with exogenous ingredient supplementation and endogenous skin activation. During the treatment, high-hardness solid microneedles penetrate the skin stratum corneum stably to form uniform microchannels, completely breaking the skin's natural absorption barrier. After the microneedles leave the skin, the microchannels remain open for a short time, allowing externally applied hyaluronic acid, oligopeptides, anti-inflammatory factors and repair ingredients to penetrate efficiently into the deep skin. At the same time, the controllable micro-trauma caused by solid microneedles can accurately stimulate dermal fibroblasts, promote collagen proliferation and rearrangement, and realize the improvement of skin relaxation, rough pores and aging texture. The whole treatment process is controllable in depth, uniform in stimulation and stable in effect, which is suitable for standardized large-scale clinical and aesthetic application.

Core Advantages of Solid Microneedle Therapy

Firstly, ultra-high mechanical stability and controllability. Solid microneedles have high hardness and are not easy to break or deform during use, with controllable penetration depth and uniform stimulation effect, avoiding local excessive or insufficient treatment. Secondly, wide ingredient compatibility. It can be matched with almost all liquid skin care and medicinal ingredients, with no restriction on ingredient molecular weight and viscosity, and flexible application schemes. Thirdly, mature technology and low industrial cost. The production and operation technology of solid microneedles is highly mature, with low manufacturing cost and high cost performance, suitable for popularization and large-scale application. Fourthly, strong skin activation ability. The physical stimulation of solid needle body is stable and effective, with significant effect on activating collagen and improving skin texture. Fifthly, wide scene adaptability. It supports institutional professional treatment and household daily maintenance, covering high-end medical treatment and civilian popular consumption scenarios.

Application Scenarios of Solid Microneedle Therapy

In professional medical aesthetics, solid microneedle therapy is mainly used for whole-face skin rejuvenation, acne pit and scar repair, large pore refinement and early anti-aging treatment, which is the basic item of major light medical institutions. In daily skin care, it is used for household micro-channeling to improve the absorption of facial masks and essences, solving the problem of ineffective skin care. In clinical dermatology, it is used for auxiliary treatment of acne, seborrheic dermatitis and post-inflammatory pigmentation, improving the efficacy of external drugs. In rehabilitation medicine, it assists in superficial wound repair and skin texture improvement after healing. In addition, solid microneedles can be used as basic sampling tools for minimally invasive skin detection, providing technical support for skin disease diagnosis and skin condition monitoring.

Manufacturing Process of Solid Microneedle Devices

The production process of solid microneedles focuses on mechanical stability and dimensional accuracy. The first step is high-hardness material selection, adopting medical 304 stainless steel and high-purity monocrystalline silicon with stable performance and strong toughness. The second step is precision material cutting and flattening to ensure the flatness of the needle base and the uniformity of the needle body. The third step is micro-molding and etching, using photolithography technology to form regular needle array distribution and control precise needle length spacing. The fourth step is multi-angle needle tip sharpening, combining mechanical grinding and chemical etching to form ultra-fine needle tips to reduce skin puncture resistance. The fifth step is surface polishing and antibacterial treatment to remove burrs, smooth the needle body and form an antibacterial protective layer. The sixth step is mechanical performance testing, including hardness test, tension test and penetration stability test. The seventh step is base assembly to fix the microneedle array on the medical adhesive base. The eighth step is dust-free packaging and gamma ray sterilization to ensure single-use safety and sterility.