皮膚科 王修含醫生

UV light

2.      Blue light

3.      Combination of blue light & red light

4.      Pulsed light

5.      Laser

Infrared lasers: 1320, 1450, 1540 nm

6.      Radiofrequency

Topic II: Acne scar treatment

Types of acne scar
    1. Hypotrophic/atrophic scar
          icepick
          boxcar
          rolling
    2. Hypertrophic scar

Optical treatment for hypertrophic acne scar

Pulsed dye laser

Intense pulsed light

Rationale of optical and electrical based treatment for atrophic acne scar
   1. Removal of scar tissue
         Devices:
            Traditional ablative lasers: removal of bulky tissue
            Fractional photothermolysis: shorten downtime
            Nitrogen plasma (PSR: plasma skin rejuvenation)

   2. Stimulation of collagen remodeling
         Wound healing process
         Cytokines of wound healing
         Effect of fractional CO2 laser on cytokines
        

Fractional lasers
1. Fractional non-ablative laser
Fractional Er: glass laser
Treatment depth
Histopathology
Wound Healing Process
Possible complications

2. Fractional ablative laser
(1) Fractional CO2 laser
     Ablative depth
     Histopathology
     Wound Healing Process

     Application
        Scar revision
        Hair pores
        Acne scar
        Skin rejuvenation
     Possible complications

(2) Fractional Er:YAG laser
     Absorption & penetration depth
     Pulse width & coagulation depth
     Clinical pictures

Plasma
Generation of plasma
Treatment of scar with plasma

Case Discussion