Ablative and non-ablative lasers are used for scars correction. Carbon dioxide laser vaporizes upper skin layers or burns microchannels through the skin (Fig.1), where fibrous lesions being formed thereafter.
Fig.1. Treatment of atrophic acne scars with laser (Fraxel)
The skin relief is being aligned due to the formation of multiple fibrous lesions. Carbon dioxide laser treatment may cause complications (lasting redness, pigmentation, transformation of atrophic scar into keloid). Pulsed Dye Laser (PDL) is non-ablative laser simply glutinates the vessels within the scar (Fig.2). As a rule, pulsed dye laser (PDL) treatment is not followed by any complications.
Fig.2. Atrophic scar treatment with vascular laser (PDL)
In the application ablative lasers for the treatment of hypertrophic and keloid scarring occurs high relapse rate of 90-100%. In processing the pulsed dye laser (PDL) efficiency treatment of hypertrophic scars – 75 – 95% of keloid – 60 – 70%. The purpose of the laser processing: glue together vessels feeding scar.
Fig.3. Post-traumatic scars before and after treatment (cryosurgery, vascular laser)