1. Department of Dental Caries Control and Aesthetic Dentistry
2. Department of Endodontics, Tianjin Stomatological Hospital, Clinician, 75 Road, Tianjin Dagu 300041, China
3. Department of Crown Bridge Prosthodontics
4. Department of Pediatric Dentistry
5. University Research Center, Nihon University, 1-2-1 Izumicho, Narashino, Chiba 275-8575, Japan
6. Department of Dental Biomaterials, Nihon University School of Dentistry at Matsudo, 870-1 Sakaecho, Nishi 2, Matsudo, Chiba 271-8587, Japan