1. Department of Conservative Dentistry and Endodontics, Guanghua School and Hospital of Stomatology, Sun Yat-Sen University
2. Guangdong Provincial Key Laboratory of Stomatology, Sun Yat-Sen University
3. Department of Biomaterials Science and Turku Clinical Biomaterials Centre —TCBC, Institute of Dentistry, University of Turku
4. College of Materials Science and Engineering, South China University of Technology
5. City of Turku Welfare Division, Oral Health Care