1. Department of Orthopedics, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei 230032, P. R. China
2. Department of Orthopedics, The Second Affiliated Hospital of Anhui Medical University, Hefei 230601, P. R. China
3. Key Laboratory of Oral Diseases Research of Anhui Province, College and Hospital of Stomatology, Anhui Medical University, Hefei 230032, P. R. China
4. Nanjing Stomatological Hospital, Medical School of Nanjing University, Nanjing 210008, P. R. China
5. Applied Oral Sciences, Faculty of Dentistry, The University of Hong Kong, Hong Kong 999077, SAR, P. R. China
6. Department of Rehabilitation Medicine, The First Affiliated Hospital of Anhui Medical University, Anhui Medical University, Hefei 230032, P. R. China