<p>Excessive gingival pigmentation is a major aesthetic concern in modern society, though it is not a medical problem they consider it as a negative attribute. Patients with gingival hyperpigmentation usually complain and request cosmetic therapy, particularly if the pigmentation is visible during speaking and smiling. Various depigmentation methods, including burr abrasion, cryosurgery, electro-surgery, split thickness flap excision and surgical scraping techniques have been used with varying degrees of success. Recently, lasers have been used to ablate cells containing and producing the melanin pigment. The present study was undertaken to compare the clinical effectiveness and patient comfort of surgical scrapping and diode laser technique used for gingival depigmentation for a follow up period of 6 months.20 subjects participated in this split mouth study. The clinical evaluation parameters included Extent and Intensity of gingival hyperpigmentation, post-operative gingival bleeding and pain. On follow up examination at 6<sup>th</sup> month there was no statistical difference in repigmentation extent and intensity between diode laser and surgical scraping techniques. The mean pain scores for treated sites with diode laser were significantly lower than surgical scrapping technique at 24 hours (t-value=2.430, p-value=0.02). The postoperative gingival bleeding at end of procedure was significantly lower with diode laser than surgical scrapping technique (p-value=<0.0001). There was no statistical difference in postoperative re-pigmentation and clinical efficacy among the subjects between surgical scraping and diode laser technique at 6<sup>th</sup> month follow up. Diode laser technique provides better haemostasis and good visibility at the surgical site. The post-operative patient comfort is better at the surgical sites treated with diode laser than surgical scrapping method. Hence, both the techniques are used for depigmentation procedures depending on the severity and gingival biotype and patient acceptance.</p>
Clinical Effectiveness of Diode Laser as an Adjunct in the Treatment of Periodontitis
