1. Department of Prosthodontics School and Hospital of Stomatology Peking University; Beijing 100081 China
2. Fifth Clinical Division School and Hospital of Stomatology Peking University; Beijing 100020 China
3. National Engineering Laboratory for Digital and Material Technology of Stomatology; Beijing Key Laboratory of Digital Stomatology; Beijing 100081 China
4. Department of Ocean and Mechanical Engineering; Florida Atlantic University; Boca Raton Florida 33431
5. Department of Biomedical Science; Florida Atlantic University; Boca Raton Florida 33431