The Er:bium Glass fractional laser skin reconstruction system adopts fiber laser with 1550nm wavelength and installs a CPG which is arranged in matrix scanning output, emitting 50um-80um spot through a high focusing lens, the target tissue is water in the dermis, forming matrix-like hole (0.12mm) around focal spot penetration directly. The penetration depth of these small spots is about 2mm (the depth is related with solar elastic fibrotic maximum depth). At this point the normal tissue among holes generates heat bridge which starts wound rehabilitation reaction and thermal effects between scarfskin and dermal tissue, then experiencing inflammation phase, proliferation phase, remodeling phase. Drugs or cosmetic essence can be applied into the wound rehabilitation reaction, 1 hour after laser irradiation, the dermal fibrous tissue arranged dense, few inflammatory cells soakage, after 3 days proliferation of epidermal cells, inflammatory cells of dermal layer and fibroblast cells are increased. 7days fibroblasts in dermal layer is increased significantly, 15 days increasing in collagen synthesis, dermal thickening. After laser irradiation there is a certain effect for skin elasticity, skin hemoglobin content, water loss through the skin, sebum content, skin moisture content but no impact on the skin melanin content. 
YILIYA-1550D Advantages:

1. Patients with mild to moderate photoaging: Rough skin, large pores, fine wrinkles, skin loosen.

2. Wrinkles caused by sunlight or early aging wrinkles, on the lower eyelid, forehead, cheek as well as crow's-feet.

3. Face lifting and tightening.

4. Acne scar treatment.

Specifications