case_images: PMC7368218_01
case_images: Initial clinical appearance with melanic pigmentations.
case_images: CRID2020-8853086.001.jpg
case_images: PMC7368218_01_CRID2020-8853086.001.jpg
case_images: fig1
case_images: A pigmentation index as mentioned by Kumar et al. was used to determine the level of pigmentation, and the score was diagnosed as "3" (diffuse brown to black pigmentation, marginal, and attached) (Figure 1).
case_images: Clinical appearance immediately after the diode laser procedure and labial frenectomy.
case_images: CRID2020-8853086.002.jpg
case_images: PMC7368218_01_CRID2020-8853086.002.jpg
case_images: fig2
case_images: This procedure was repeated until the desired depth of tissue removal was reached, combined with a labial frenectomy (Figure 2).
case_images: Clinical image showing a fibrin layer that completely covers the "laser wound" 6 hours after the operation.
case_images: CRID2020-8853086.003.jpg
case_images: PMC7368218_01_CRID2020-8853086.003.jpg
case_images: fig3
case_images: It should be noted that a greyish-white fibrin layer completely covers the "laser wound" 6 hours after the operation (Figure 3), which should not be misinterpreted as secondary infection.
case_images: Clinical image of the upper anterior gingiva 4 months after, with no recurrence.
case_images: CRID2020-8853086.004.jpg
case_images: PMC7368218_01_CRID2020-8853086.004.jpg
case_images: fig4
case_images: Four months later, the patient had no symptoms or signs of gingival melanin pigmentation (Figure 4).