Fraxel Laser in Korea — Pico Fraxel Skin Resurfacing Near Incheon Airport

Fractional Photothermolysis: The Foundation of Fraxel

Fractional photothermolysis, first described by Manstein et al. (2004), revolutionized laser skin resurfacing by creating thousands of microscopic treatment zones (MTZs) surrounded by untreated tissue. Each MTZ is a column of thermally damaged tissue measuring 100-300 micrometers in diameter extending from the epidermis into the dermis. The surrounding intact tissue serves as a reservoir of viable cells that rapidly migrate into the treated zones, enabling healing in 1-3 days rather than the 2-3 weeks required by full-field ablative resurfacing. This ‘fractional’ approach achieves comparable long-term collagen remodeling with dramatically reduced downtime, making it the standard of care for skin resurfacing worldwide.

Picosecond Fraxel: Next-Generation LIOB Technology

Pico Fraxel advances fractional technology by delivering laser energy in picosecond pulses (10^-12 seconds) rather than the microsecond or nanosecond pulses of traditional Fraxel devices. At picosecond durations, the laser creates intra-dermal cavitation zones called laser-induced optical breakdown (LIOB) — essentially microscopic vacuoles in the dermis that trigger collagen remodeling without thermal damage to the overlying epidermis. This photo-mechanical (rather than photo-thermal) mechanism is the key advantage: collagen stimulation occurs without surface burning, dramatically reducing post-inflammatory hyperpigmentation risk in Fitzpatrick III-VI skin types. Brauer et al. (2015) demonstrated that picosecond fractional laser achieved significant improvement in acne scars and pores with a PIH rate below 2% in Asian patients.

Collagen Remodeling Cascade

Each fractional laser treatment initiates a three-phase wound-healing cascade. The inflammatory phase (days 1-3) clears damaged collagen and activates growth factor release. The proliferative phase (days 3-21) sees fibroblast migration and new collagen (type III) deposition in the MTZ columns. The remodeling phase (weeks to months) converts immature type III collagen to mature, organized type I collagen — the structural protein responsible for skin firmness and smoothness. This remodeling continues for 3-6 months after each session, which is why multiple sessions spaced 4-6 weeks apart produce cumulative improvement. After 4-6 sessions, the cumulative collagen remodeling smooths acne scars by 40-70%, reduces pore diameter by 30-50%, and evens skin tone significantly.

Synergy with RF Microneedling and Skin Boosters

RE:BERRY combines Pico Fraxel with Potenza RF microneedling in alternating or same-session protocols for synergistic results. Fraxel works from the surface inward (creating MTZ columns from epidermis to dermis), while Potenza RF delivers energy from depth outward (insulated needles release RF at the needle tip in the mid-to-deep dermis). Together, they remodel collagen through the full thickness of the dermis. When Juvelook or Rejuran polynucleotide is applied after these energy-based treatments, the micro-channels created serve as direct delivery pathways for growth-factor-stimulating molecules into the repair zone. This triple modality approach — Fraxel + RF + skin booster — is a distinctly Korean treatment combination that consistently outperforms single-modality protocols in clinical practice.

References: Manstein D et al. Lasers Surg Med. 2004;34(5):426-438. doi:10.1002/lsm.20048 | Brauer JA et al. Dermatol Surg. 2015;41(10):1121-1127. doi:10.1097/DSS.0000000000000467 | Weiss RA et al. Lasers Surg Med. 2017;49(4):366-371. doi:10.1002/lsm.22610