1. State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi International Joint Research Center for Oral Diseases, Center for Tissue Engineering, School of Stomatology, The Fourth Military Medical University , Xi’an, Shaanxi 710032, China
2. Department of Medical Rehabilitation, School of Stomatology, The Fourth Military Medical University , Xi'an, Shaanxi 710032, China
3. Department of Orthodontics, School of Stomatology, The Fourth Military Medical University , Xi'an, Shaanxi 710032, China
4. Xi'an Institute of Tissue Engineering and Regenerative Medicine , Xi'an, Shaanxi 710032, China