An auxiliary device for screw-retained fixed implant restorations which prevents extrusion of cement into

Zhen Yang1, Mingyue Liu2, Xiaoqiang Liu3

  • 1Graduate student, Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing, PR China.