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天然型无机骨的制备及其成骨效应的实验研究 总被引:8,自引:0,他引:8
已有多种材料修复骨缺损,但天然型无机骨(naturalnon-organicbone,NNB)的骨作用研究较少。采用动物骨,经物理、化学及高温处理,除去其有机成分,保留其无机成分的三维结构外型。天然型无机骨既具有类似人骨的网状孔隙,又有利于传导成骨。植入家兔的肌肉、桡骨内和胫骨内,采用X线,组织学荧光标记等方法观察。证实,该材料组织相容性好,且具有新生骨出现早、生长快及成骨量多的特点,是当前较理想的新型人体骨组织替代材料 相似文献
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总结54例骨纤维结构不良的临床及病理表现,并对6例新鲜标本作碱性磷酸酶染色。结果发现:54例中31例有灶性骨母细胞,且纤维样细胞与典型骨母细胞移行;14例中见粘合线,6例新鲜标本碱性磷酸酶均呈阳性,对照组纤维瘤及纤维肉瘤碱性磷酸酶均呈阴性。根据:①纤维样细胞与典型骨母钿胞移行,并有成骨作用。②纤维样细胞与骨内膜关系密切。③纤维样细胞碱性磷酸酶阳性。推测在骨的纤维构结不良中的纤维样细胞其本质符合骨祖细胞特点。故认为骨的纤维结构不良的发病机制可能是成骨过程的障碍,即骨祖细胞向骨母细胞转化受阻。 相似文献
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Flow cytometric DNA analysis was performed on formalin fixed paraffin-embedded samples taken from 43 cases of peripheral nerve tumors. Fourteen samples were taken from benign tumors, 11 from actively proliferative tumors and 12 from malignant tumors. Ploidy pattern and proliferative index of tumors were estimated. All samples of benign tumors showed a diploid model of DNA content whereas DNA aneuploidy was encountered in 75% (12/16) of the malignant tumors and 25% (4/16) of the actively proliferative tumors. The proliferative index (PI) of benign tumors (medium: 24.8%) was lower than that of proliferative tumors (medium: 42.7%). The proliferative index of malignant tumors was the highest in the experimental group (medium: 51.2%). These results were conformable to the malignant degree of histologic grading and prognosis. 相似文献
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