The Effect of Smoking on Dimensional Changes of Free Gingival Graft Around Dental Implants

Inclusion Criteria: Implants with inadequate attached gingiva on the buccal site, which placed in posterior region at least 1 year ago, and loaded with a fixed prosthetic restoration at least 6 months ago. Exclusion Criteria: Implants with peri-implantitis, patients who had previously the soft or hard tissue graft surgery at the site in question, patients who had previously operated from the donor site, patients with systemic disease that may interfere with periodontal surgery, patients taking any medication that can prolong bleeding, patients with immune system disease, infectious diseases such as hepatitis or HIV, individuals under the age of 18, and women with pregnant or breastfeeding.