How Do Derma Rollers Work

Skin needling is a recently proposed technique that involves using a sterile roller comprised of a series of fine, sharp needles to puncture the skin. At first, facial skin must be disinfected, then a topical anesthetic is applied, left for 60 minutes. The skin needling procedure is achieved by rolling a performed tool on the cutaneous areas affected by acne scars (Figure 6), backward and forward with some pressure in various directions. The needles penetrate about 1.5 to 2mm into the dermis. As expected, the skin bleeds for a short time, but that soon stops. The skin develops multiple microbruises in the dermis that initiate the complex cascade of growth factors that finally results in collagen production. Histology shows thickening of skin and a dramatic increase in new collagen and elastin fibers. Results generally start to be seen after about 6 weeks but the full effects can take at least three months to occur and, as the deposition of new collagen takes place slowly, the skin texture will continue to improve over a 12 month period. Clinical results vary between patients, but all patients achieve some improvements (Figures 7 and 8). The number of treatments required varies depending on the individual collagen response, on the condition of the tissue and on the desired results. Most patients require around 3 treatments approximately 4 weeks apart. Skin needling can be safely performed on all skin colours and types: there is a lower risk of postinflammatory hyperpigmentation than other procedures, such as dermabrasion, chemical peelings, and laser resurfacing. Skin needling is contraindicated in the presence of anticoagulant therapies, active skin infections, collagen injections, and other injectable fillers in the previous six months, personal or familiar history of hypertrophic and keloidal scars

Figure 6 (the procedure)

Figure 7(patient before the treatment)

Figure 8(patient after the treatment)

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