* Private practice at Crystal laser center and Vejthani Hospital Treatment of Gingival Melanin Hyperpigmentation by

Background: Gingival melanin hyperpigmentation is clinically presented as “black gum ” which is not medical but esthetic problem especially for those who have gummy smile. Various treatment modalities have been made for cosmetic removal of pigmented area including laser ablation which recently seems to be the most effective, reliable and satisfactory method. This paper describes two cases of depigmentation technique using Er,Cr:YSGG laser. Methods: Two patients with gingival melanin hyperpigmentation were treated by 2780 nm Er,Cr:YSGG laser device which was set at 1.0-1.75 watt, 7 % water and 11 % air for gingival ablation, and then 0.5 watt, 0 % water and 11 % air for biologic bandage. The operation was done in non contact mode under topical anesthesia. Patients were observed for 12 months. Results: Removal of melanin pigment was seen immediately after treatment. Healing was good within a week. No post operative complications such as infection, pain or bleeding was encountered. The final outcome was satisfactory for all patients. However, second application may be needed. Slight repigmentation was found in one patient in the eleventh month of observation. Conclusion: Considering good clinical outcome and patients satisfaction, Er,Cr:YSGG laser ablation is possibly a method of choice for effective removal of gingival melanin hyperpigmentation