As the basis of soft tissue around implant, biologic width is a key of esthetics restoration. Biologic width that is made up of junctional epithelium and connective tissues is barrier which blocks the implant out of the oral space to protect it. The definition of biologic width, the differences between natural teeth and implant in biologic width, the connection of biologic width, platform-swiched implant and the peri-implantitis were discussed in this article.
