Cryopreserved bone-derived osteoblasts (CBOs) have been considered as a promising cell source for bone regeneration. Previous studies have demonstrated that CBOs had good proliferation and osteogenicity. However, the long-term outcome of CBOs in vivo still remains unknown. In this experiment, we applied CBOs combined with calcium phosphate cement (CPC) to augment maxillary sinus in canine, computer tomography, polychrome labeling, biomechanical tests, fluorescent immunohistochemistry staining and histological analysis were used to analyze the property and mineralization process of the tissueengineered bone preclinical application. Our results showed that CBOs combined with CPC could promote bone regeneration, dramatically maintain the height, volume and biomechanical property of augmented maxillary sinus. Furthermore, the tissue-engineered bone was more mature than scaffold alone or autogenous bone, and bone formation and remodeling were still apparent 20 months postoperatively. Additionally, 4 months after surgery might be the suitable time point for implants placement in the regenerated bone. These results also indicate that cryopreserved bone may be a potential source of osteoblasts for maxillary sinus augmentation.
Cryopreserved bone-derived osteobtats Maxillary sinus augmentation Long-term Bone regeneration
Shaoyi Wang Xinquan Jiang Zhiyuan Zhang Wenjie Zhang Jun Zhao Dongxia Ye Chao Zhu Yunhao Yang Xiuli Zhang Xiaojuan Sun Chi Yang
Department of Oral and Maxillofacial Surgery, Ninth Peoples Hospital, Shanghai Jiao Tong University Oral Bioengineering Lab/Regenerative Medicine Lab, Department of Prosthodontics, Shanghai Research I Department of Prosthodontics, Ninth Peoples Hospital Shanghai Jiao Tong University School of Medici Shanghai Research Institute of Stomatology, Ninth Peoples Hospital Shanghai Jiao Tong University Sc Oral Bioengineering Lab/Regenerative Medicine Lab, Shanghai Research Institute of Stomatology, Ninth Department of Oral and Maxillofacial Surgery, Affiliated Hospital of Ningxia Medical University, Nin