| Affiliation: | a Advanced Biomaterials, Department of Restorative Sciences, Division of Oral Health Sciences, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Yushima 1-5-45, Bunkyo-ku, Tokyo 113-8549, Japan;b Division of Operative Dentistry, Department of Restorative Dentistry, Tohoku University, Graduate School of Dentistry, 4-1 Seiryo-machi, Aoba-ku, Sendai 980-8575, Japan;c Department of Prosthetic Dentistry, School of Dentistry, Justus-Liebig-University, Giessen, Germany;d Research and Development, Heraeus Kulzer GmbH, Wehrheim, Germany;e Saarland University Hospital, Department of Operative Dentistry, Periodontology and Preventive Dentistry, Homburg/Saar, Germany |
