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对20例颌骨巨细胞肉芽肿和12例颌骨巨细胞瘤的病理学特性进行比较;并对8例颌骨巨细胞肉芽肿和5例颌骨巨细胞瘤的切片做 Wilder's 网状纤维染色和三色染色。结果表明:颌骨巨细胞肉芽肿的网状纤维和胶原纤维较颌骨巨细胞瘤丰富,且灶性分布明显,上述2种染色有助于颌骨巨细胞肉芽肿和颌骨巨细胞瘤的诊断。 相似文献
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本文对83例涎腺恶性多形性腺瘤进行形态观察,其中20例用CEA、S-100蛋白和二种角蛋白进行免疫组化标记。认为恶性多形性腺瘤大多数由良性多形性腺瘤恶变而来,瘤细胞浆内CEA阳性是诊断恶性的依据之一。并提出将恶性多形性腺瘤分为癌和癌肉瘤二个组织学亚型。 相似文献
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氢氧化钙应用于口腔内科领域已有六十多年历史,许多学者对其生物学性能和剂型作了大量的研究和改进。上海第二医学院口腔材料研究室试制成可硬化氢氧化钙护髓基衬,既可作为盖髓剂,又可作为窝洞充填垫基材料。 相似文献
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镧、铈、氟在抑制人离体牙根面脱矿中作用的比较研究 总被引:5,自引:0,他引:5
作者采用含镧(La)、铈(Ce)、氟(F)的脱矿液,在体外模拟口腔pH循环变化的环境中对离体人牙根面进行抑制脱钙的实验研究,并采用化学及能谱分析手段,对La,Ce,F在根面的抑制脱钙作用进行定量分析。结果显示,这三种微量元素对根面均有明显的抑制脱钙作用,但F较La、Ce的抑制作用强.该研究还从晶体物理化学角度对La、Ce、F的抑制脱矿作用的机理进行探讨。 相似文献
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Microcrystalline structure changes of teeth enamel crystals during the artificial caries and synthetic saliva reminerlization were reported. Enamel samples were thinned by argon-ion-milling and examined by high-resolution transmitting electron microscope. The results revealed that the lattice dissolution of enamel hydroxyapatite started from central parts and grain boundaries of crystals, the former were often parallel to (1010) plane and advancing along the [0001] zone axis of crystals. The results also shown that synthetic saliva may reduce the quantity of bright contrast spots in lattice image for artificial carious crystals. In addition, some defects such as dislocations were found in grains, and they are believed to be related to the dissolution of lattice. Three kinds of structural weak sites revealed in crystals, i. e. (1)dislocations, (2) vacancies or impurities, and (3) grain boundaries. 相似文献
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造釉细胞瘤的免疫组织化学研究陈国民刘瑷如我们观察了25例造釉细胞瘤中高分子角蛋白(highmolecularcytokeratin,CKH)、纤维连接蛋白(fi-bronectin)、波形蛋白(vimentin)、Ⅳ型胶原(typeⅣcolagen)... 相似文献
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