1. Department of Dentistry, National Yang-Ming University, Taipei 112, Taiwan
2. State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China
3. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China
4. Division of Rhinology, Department of Otolaryngology Head and Neck Surgery, Taipei Veterans General Hospital, Taipei 112, Taiwan and School of Medicine, National Yang-Ming University, Taipei 112, Taiwan
5. Institute of Materials Science and Engineering, National Central University, Taoyuan 320, Taiwan
6. Department of Dentistry, National Yang-Ming University, Taipei 112, Taiwan; Institute of Oral Biology, National Yang-Ming University, Taipei 112, Taiwan; Graduate Institute of Basic Medical Science, China Medical University, Taichung 404, Taiwan; Department of Medical Research, China Medical University Hospital, Taichung 407, Taiwan; Department of Bioinformatics and Medical Engineering, Asia University, Taichung 413, Taiwan; and Department of Stomatology, Taipei Veterans General Hospital, Taipei 112, Taiwan