Classification of Microneedle Technologies and Devices
In recent years, microneedle technology has become a popular topic in the fields of beauty and skincare treatments. By creating microchannels on the skin or stimulating skin self-repair, microneedles have shown promising potential in drug delivery, skin rejuvenation, and cosmetic treatments. Microneedles can be classified into various types based on their materials, such as silicon, metal, and polymer-based microneedles. To better understand the practical applications of microneedles, the following classification is made based on their use in drug delivery and cosmetic procedures.
1.Hydrogel-Based Microneedles
Hydrogel microneedles are made from biocompatible materials and can form temporary channels in the skin to gradually release drugs to targeted areas. They have shown good results in drug delivery and skin repair treatments, especially in non-invasive therapies.
2.Hollow Microneedles
Hollow microneedles are ideal tools for precise drug delivery through their micro-sized hollow structures, which directly inject substances into deeper layers of the skin. They are widely used in cell therapy, vaccination, and localized drug administration.
3.Biodegradable Microneedles
Made from biodegradable materials, these microneedles gradually dissolve and release drugs within the skin, eliminating the need for subsequent removal. They are often used for skin regeneration and anti-aging treatments.
4.Coated Microneedles
Coated microneedles have an active ingredient coated on their surface. When applied to the skin, the microneedles pierce the outer layer, delivering the active substance into the inner layers. They are suitable for localized drug treatments and are easy and safe to use.
5.Solid Microneedles
Solid microneedles are commonly used for physical stimulation and skin cell activation. By creating micro-holes in the skin, they promote skin self-repair and collagen regeneration.
Common Microneedle Devices in Aesthetic Treatments
In recent years, various microneedle devices have emerged in the aesthetic medicine market, including derma rollers, stamp microneedles, electric microneedles, DermaFrac systems, and radiofrequency microneedles. Each device has unique features and applications:
1.Derma Rollers
Derma rollers are currently the most widely used type of microneedle device. Typically consisting of a handle and a roller head with rows of microneedles, their needle length usually ranges from 0.5mm to 3mm. As the roller moves over the skin, the microneedles create microchannels or stimulate skin cell proliferation. Made of medical-grade steel, derma rollers are suitable for multiple uses over large skin areas.
2.Stamp Microneedles
Stamp microneedles are composed of a handle and a stamp-like head with microneedles embedded in the surface. The microneedles are applied perpendicularly to the skin and are commonly used for local scar treatment.
3.Electric Microneedles
Electric microneedles consist of a pen-like body and a vibrating stamp microneedle head. The mechanical drive causes the microneedles to vibrate repeatedly, eliminating the uneven pressure issues often seen in manual operations. Electric microneedles are ideal for facial rejuvenation due to their ease of use and consistent results.
4.DermaFrac System
DermaFrac combines microdermabrasion, microneedling, simultaneous deep tissue serum infusion, and LED light therapy. It is used to treat sun-damaged skin, acne, enlarged pores, uneven skin tone, wrinkles, fine lines, and superficial scars.
5.Radiofrequency Microneedles
Radiofrequency microneedles deliver electrical energy into the skin through microneedles, treating scars, hyperhidrosis, skin tightening, and facial rejuvenation without damaging the epidermis. By stimulating collagen production in the deeper layers, RF microneedles effectively tighten the skin and reduce wrinkles.
