1. Central Laboratory Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
2. School of Medical and Life Sciences Sunway University Darul Ehsan Selangor 47500 Malaysia
3. Department of Geriatric Dentistry Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
4. Neuromodulation Laboratory School of Biomedical Sciences Li Ka Shing Faculty of Medicine The University of Hong Kong Pokfulam Hong Kong P. R. China
5. Department of Biomedical Engineering Peking University Beijing 100871 P. R. China
6. Department of Dental Materials & Dental Medical Devices Testing Center Peking University School and Hospital of Stomatology Beijing 100081 P. R. China
7. National Engineering Research Center of Oral Biomaterials and Digital Medical Devices NMPA Key Laboratory for Dental Materials Beijing Laboratory of Biomedical Materials & Beijing Key Laboratory of Digital Stomatology Peking University School and Hospital of Stomatology Beijing 100081 P. R. China