Semi permanent Make-up removal with Lasers


#1
  • Semi-permanent tattoos are often used to alleviate tedious daily make-up but they also, like other tattoos can become cosmetically unacceptable.

  • Treatment :

    • Available classical treatments include, surgery, dermabrasion but both induce scarring which is not acceptable for patients who are looking for a cosmetic procedure to correct another one.
    • Q-Switched lasers have been tried and include: ruby, alexandrite and Nd:YAG
  • The authors sought to study the best timing and results of using QS Nd-YAG lasers:

    • In this study 36 tattoos were done on rat skin with black color (semi-permanent make-up ink (MEI-CHA) and a tattooing machine).
    • Then a laser treatment with the 1064nm laser (Medlite) was done with a 2mm size and an fluence (energy) of 6 J/m2:
      • on the same day of the tattooing
      • after 3 days
      • after 5days
      • after 1, 2 and 3 weeks
    • Pigmentation was measured by colorimetry (chromometer: Mexameter) and biopsies were done on one side compared with a symmetrical contralateral untreated tattoo lesion
    • results were evaluated with a mexameter (3 times) with calculation of the relative melanin index (RMI)
  • Results :

    • RMI :
      • same day:64 for the non laser treatment side vs 16 for the laser treated side
      • 3d: 58 vs 14
      • 1w: 56 vs 17
      • 2w: 52 vs 18
      • 3w: 49 vs 17
    • Histology :
      • it shows that it is effective on the same day of treatment as the location of the pigment is fully epidermal
      • after 1w the pigment moves to superficial and mid dermis and the treatment remains effective
      • However, after 3w most pigment has moved to the mid-to-deep dermis

Conclusion

  • Treatment is most effective, on the day of tattooing to remove pigment but the treatment is safer to do when the crusts have peeled off and wound repair complete.
  • Thereafter treatment is less reliable as pigmentatopm progressively migrates to the dermis.