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- Presentation
New Developments in Treating Ethnic Skin with Energy-Based Devices
Description
The speaker explains key considerations for treating ethnic skin with energy-based devices, emphasizing that darker skin has the same number of melanocytes as lighter skin but more densely packed melanosomes, making melanin-related injury and post-inflammatory hyperpigmentation major concerns. He notes that lower wavelengths are riskier because melanin absorbs more light, and that any treatment disrupting the dermal-epidermal junction can trigger pigmentation problems. Fractional lasers and RF microneedling remain important tools, with RF microneedling often safer in skin of color because insulated needles can deliver heat deeper while sparing the superficial skin; however, the speaker discusses an FDA caution about RF microneedling complications such as burns, scarring, fat loss, and nerve damage, and suggests these issues may be related to device differences, lack of impedance monitoring, and poor training. He highlights the importance of tissue impedance feedback to keep heating in the optimal “sweet spot” and avoid either insufficient effect or excessive injury. The talk then introduces a newer fractional laser delivery approach using focal point/curved aperture technology, which concentrates energy deeper in the dermis while spreading energy more broadly at the surface to reduce melanin absorption, pain, and downtime. Early clinical examples in darker skin show promising acne scar improvement with minimal redness and swelling, and the speaker suggests this technology may offer a better safety profile and possibly more tightening or lifting effects, though more study is needed.
View moreConclusions
- Treating ethnic or darker skin is safest when melanin exposure is minimized by using longer wavelengths, larger spot sizes, longer pulse durations, cooling, and test spots.
- Because darker skin remains prone to post-inflammatory hyperpigmentation, any treatment that disrupts the dermal-epidermal junction must be used cautiously.
- Fractional lasers remain effective for scars and resurfacing in skin of color, but lower densities generally improve safety at the cost of requiring more sessions.
- RF microneedling can produce strong acne-scar improvement with less PIH in darker skin, but its safety depends heavily on device design, settings, and operator expertise.
- The FDA safety concerns around RF microneedling appear to be driven largely by a small number of reports concentrated around one device rather than the modality as a whole.
- Real-time impedance monitoring may be a key safety advance because it helps keep tissue heating in the optimal coagulation range and reduce burns, scarring, and fat loss.
- Poor outcomes with RF microneedling are likely related not only to technical factors such as needle design and energy delivery, but also to inadequate training and inappropriate use in nonexpert settings.
- Newer focal-point laser delivery may improve epidermal sparing while placing more energy deeper in the dermis, potentially improving safety and efficacy in ethnic skin.
- This new laser approach looks promising for acne scars and may even produce some tightening or lifting effects, but those benefits still need more reproducible clinical evidence.
- Overall, the presentation suggests that the future of energy-based treatment in ethnic skin lies in more precise, individualized, feedback-controlled devices that balance efficacy with stronger safety safeguards.
- Fitzpatrick TB. The validity and practicality of sun-reactive skin types I through VI. Arch Dermatol. 1988 Jun;124(6):869-71.#10.1001/archderm.1988.01670060015008
- From Bologna, Jorizzo & Rapini: Dermatology 2e. © 2008 Elsevier, Ltd.