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
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