2018 Volume 27 Issue 3 Pages 203-213
Background and aims: The Aim of this study was to evaluate the effectiveness of Diode laser and
Er,Cr:YSGG laser ablation on the treatment of physiologic gingival melanin hyperpigmentation.
Materials and methods: This research design was split mouth, double blind, and clinical trial. The power
of the diode laser was set at 1 W, fiber 320 μ irradiation mode: continuous-wave with treatment mode
of contact tip and Er,Cr:YSGG laser (2780 nm) was set at 100 MJ, frequency of 15 Hz, total power of 1.75
W, 10% water and 20% air. Bleeding, pain, healing, Dummett oral pigmentation index (DOPI) and Hedin
melanin score changes and repigmentation were assessed. Patients were followed for 6 months.
Results: A total number of 14 patients were involved in this study. There were statistically significant
differences in reduction of DOPI and Hedin melanin score in each treatment groups separately while
diode laser group had better results (P<0.0001). There was no statistically significant difference between
groups in terms of repigmentation. There was more pain in diode laser group (P< 0.0001) and there was
more bleeding in Er,Cr:YSGG laser group (P = 0.0156). Gingival healing was more in Er,Cr:YSGG laser
group (P<0.0001).
Conclusion: Diode laser had more efficiency for reduction of DOPI and Hedin melanin index scores.
