1. Department of Periodontology, School and Hospital of Stomatology, Cheeloo College of Medicine Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration & Shandong Provincial Clinical Research Center for Oral Diseases Jinan Shandong China
2. Department of Stomatology the Second Hospital of Shandong University Jinan Shandong China
3. Department of Endodontics, Central Laboratory, Jinan Stamotological Hospital, Jinan Key Laboratory of oral tissue regeneration Shandong Provincial Health Commission Key Laboratory of Oral Diseases and Tissue Regeneration Jinan Shandong China