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Objective To study osteogenic courses and features of human osteoblasts cultured in vitro and seeded into alloplastic decalcified cancellous bone.Methods Human osteoblasts isolated from normal human perios- teum were cultured and amplified in vitro.Thy configuration and developing manners of osteoblasts were observed. Then osteoblasts were seeded into alloplastic decalcified cancellous bone.Thy composites were implanted and cultured in thy body of athymic mice.The specimens were obtained 8 weeks later.Osteogenic characteristics were observed by scanning electron microscope.Results Osteoblasts isolated from human periosteum developed well and proliferated rapidly in vitro.Island new bone formation could be observed histologically 8 weeks after the composites of os- teoblasts and alloplasric decalcified cancellous bone were implanted and cultured in the body of athymic mice.Conclu- sion Calcified bone can be formed by seeding osteoblasts into alloplastic decalcified cancellous bone,which may be a new kind of bone graft source to construct bone defects.
RESUMEN
<p><b>OBJECTIVE</b>To analyze the clinical feature and prognosis of primary branchial carcinoma.</p><p><b>METHODS</b>The main method of this study was reviewing the clinical feature, diagnosis, treatment methods and prognosis of 5 patients suffered from primary branchial carcinoma.</p><p><b>RESULTS</b>All of the tumors were excised extensively. All of the patients received radical neck dissection and post-operative radiotherapy. 3 patients had pathologic evident of metastasis in lymph nodes of cervical region. 2 patients died of local recurrence of tumor and metastasis to lung. 1 patient died after post-operative 2 years. 2 patients were still alive after 5 years' follow-up.</p><p><b>CONCLUSION</b>Primary branchial carcinoma has the very similar clinical feature with branchial cyst. The diagnosis should be considered if painless mass and swollen lymph nodes were found in upper neck region of patients. Rapid frozen pathologic section should be made regularly to make the diagnosis clear. The treatment should include extensive excision of tumor and radical neck dissection to improve the cure rate and survival rate.</p>