1Department of Implantology, School and Hospital of Stomatology, Cheeloo College of Medicine, Shandong University, Jinan, China
2Shandong Key Laboratory of Oral Tissue Regeneration, Jinan, China
3Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, China
4School of Stomatology, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, Shandong, China