Effect of Aging and Porcelain Sintering on Rotational Freedom of Internal-Hex One-Piece Zirconia Abutments

Abstract

Misfit of the Y-TZP ceramic abutment on the internal-hex connection of implants may be implicated in screw joint loosening. The results of this report suggested that, if all laboratory steps are followed carefully, changes will not occur at the implant/Y-TZP ceramic abutment interface. Maintenance of the original features of the abutment may reduce the risk of screw loosening.