Long-Term Effect of Keratinized Tissue Width on Peri-implant Health Status Indices: An Updated Systematic Review and Meta-analysis

The presence of at least 2 mm of KT around implants has a protective effect on the peri-implant tissue condition. Narrow KT was related to higher BL, BOP, mBI, GI, mGI, PI, mPI, and GR. In addition, with regard to PD, no significant difference was found.