1. Shandong Provincial Key Laboratory of Oral Tissue Regeneration; School of Stomatology, Shandong University; Jinan 250012 China
2. Department of Periodontology; School of Stomatology, Shandong University; Jinan 250012 China
3. State Key Laboratory of Crystal Materials; Shandong University; Jinan 250100 China
4. Department of Bone Metabolism; School of Stomatology Shandong University, Shandong Provincial Key Laboratory of Oral Tissue Regeneration; Jinan 250100 China
5. Department of Periodontology; Yantai Stomatological Hospital; Yantai 264001 China