How to Fix Acne Scars in Korea — Multi-Layer Scar Remodeling at RE:BERRY Myeongdong

Subcision and Collagen Neogenesis for Atrophic Acne Scars

Subcision remains the gold standard for releasing tethered atrophic acne scars. The technique, originally described by Orentreich and Orentreich, involves inserting a tri-beveled needle beneath depressed scars to sever fibrous bands connecting the dermis to subcutaneous tissue. This mechanical disruption achieves two therapeutic effects: immediate scar elevation from tether release, and delayed collagen neogenesis from the wound-healing cascade triggered by controlled subcutaneous hemorrhage. Alam et al. demonstrated that subcision combined with injectable poly-L-lactic acid produced 62% greater scar improvement than subcision alone at 6-month follow-up, establishing the scientific rationale for combining subcision with collagen stimulators like Juvelook. The platelet-rich fibrin clot formed beneath the scar functions as a natural biological scaffold, attracting fibroblasts and growth factors that deposit new type I and type III collagen over 8-12 weeks post-procedure.

Radiofrequency Microneedling for Dermal Remodeling in Acne Scars

Bipolar radiofrequency microneedling — the mechanism underlying Potenza RF — delivers controlled thermal energy through insulated microneedles at precise dermal depths, triggering a wound-healing response that generates new collagen and elastin fibers. Unlike ablative fractional lasers that damage the epidermis (creating PIH risk in Asian skin), RF microneedling bypasses the epidermis entirely, making it significantly safer for Fitzpatrick III-V skin types. Shin et al. conducted a split-face randomized controlled trial comparing bipolar RF microneedling against 1,550nm fractional laser for atrophic acne scars, finding that RF microneedling achieved equivalent clinical improvement (2.1 vs 2.0 on Goodman-Baron scale) with significantly less post-inflammatory hyperpigmentation (4% vs 18%). When Potenza delivers RF energy through its 49 gold-tipped needles, the thermal zones reach temperatures of 65-70 degrees Celsius — sufficient to denature existing collagen and initiate neocollagenesis without epidermal ablation.

Fractional Picosecond Laser for Surface Texture Correction

Pico Fraxel creates a grid of micro-treatment zones using picosecond-domain laser pulses, generating Laser-Induced Optical Breakdown (LIOB) cavities in the upper dermis. These photomechanical micro-injuries trigger localized collagen remodeling without the thermal damage associated with traditional fractional CO2 lasers. Tan et al. demonstrated that fractional picosecond 1064nm laser achieved 51-75% improvement in atrophic acne scars with significantly fewer sessions and less downtime than ablative fractional lasers. The photomechanical mechanism is critical for safely fixing acne scars in Korea’s predominantly Asian patient population, as it avoids the excessive thermal injury that causes post-inflammatory hyperpigmentation in darker skin tones.

Alam M et al. JAMA Dermatol. 2018;154(3):330-338. doi:10.1001/jamadermatol.2017.5903

Shin JU et al. Lasers Surg Med. 2012;44(8):631-636. doi:10.1002/lsm.22068

Tan KJ et al. Lasers Surg Med. 2019;51(4):341-347. doi:10.1002/lsm.23025