Effect of Injectable Platelet Rich Fibrin on Healing and Patient Satisfaction Following Laser Gingival Depigmentation

Inclusion Criteria: * Male and female with age range from 16 to 45 years old. * Systemically free from any disease as evidenced by the health questionnaire guided by modified Cornell medical index (Pendleton et al., 2004). * Gingival hyperpigmentation on maxillary and mandibular labial keratinized gingiva score 3 (Dummett et al., 1964). * Patient with thick gingival phenotype (\>1.5mm) (Claffey and Shanley, 1986). Exclusion Criteria * Pregnant and lactating women. * Smokers. * Gingival pigmentation associated with occupational Hazards. * Patients with missing anterior teeth. * Patients with any metallic restoration related to anterior teeth or undergoing orthodontic treatment. * Vulnerable groups (prisoners, handicapped and orphans).