Dermaroller is a cylindrical microneedling device equipped with multiple fine needles ranging from 0.25 to 2.5 millimeters in length, designed to create controlled micro-injuries in the skin’s surface for therapeutic purposes. The instrument consists of a rotating barrel studded with sterile surgical-grade stainless steel or titanium microneedles arranged in uniform rows.
The device operates through percutaneous collagen induction therapy, creating thousands of microscopic channels through the epidermis into the dermis. These micro-wounds stimulate the release of growth factors, triggering neocollagenesis and elastin production. The needle density typically ranges from 192 to 540 needles per roller, with varying configurations optimized for different treatment areas.
Clinical applications include the treatment of acne scarring, photoaging, striae distensae, and hyperpigmentation disorders. The microchannels formed remain patent for approximately 15-20 minutes post-treatment, enabling enhanced transdermal delivery of therapeutic agents. Modern dermarollers incorporate safety features such as needle sterilization systems and ergonomic handles to ensure precise depth control and uniform penetration patterns.
