Photoaging, Controlled Tissue Damage & Fractional Laser Remodeling

The final lesson addresses the cellular differences between intrinsic chronological aging and extrinsic photodamage. You will examine epidermal/dermal photoaging, collagen deficiency, cellular senescence (SASP), and age-related pore enlargement. The lesson compares specific (light-based) and non-specific (thermal, mechanical, chemical) controlled tissue damage to activate the wound healing cascade. You will study application techniques for chemical peels, microneedling, TMFI/FRFM, water-selective lasers, non-ablative fractional lasers (1550 nm Er:Glass), ablative fractional lasers (AFL), and deep EBDs.

– Intrinsic biological aging vs. extrinsic photo-damage pathobiology
– Skin photoaging: epidermal turnover, dermal breakdown, and collagen deficiency
– The cellular micro-environment and Senescence-Associated Secretory Phenotype (SASP)
– Pathophysiology of age-related pore enlargement and textural degradation
– Epidermal vs. dermal hyperpigmentation and textural treatment pathways
– Controlled tissue damage: specific (light-based) vs. non-specific (heat, mechanical, chemical)
– Activation of the cutaneous wound healing cascade
– Chemical peeling: agent selection, depth control, and clinical indications
– Microneedling, TMFI/FRFM, and water-selective laser applications
– Fractional lasers: Non-Ablative Fractional Lasers (NAFL) vs. Ablative Fractional Lasers (AFL)
– Dermal remodeling mechanisms using the 1550 nm Er:Glass Non-Ablative Fractional Laser
– Application of deep EBDs (HIFU and NMRF) in photoaged skin rejuvenation.