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- Methods:Specimens were obtained from patients who suffered from dental traumas and the upper primary central incisors cannot be kept. 方法:取外伤后无法保存的上颌乳中切牙作为标本,运用扫描电镜技术进行形态学观察。
- primary central incisor 乳中切牙
- With the loss of the alveolar height, the maximum equivalent stress and the principle stress of the upper central incisor periodontium increased. 随着牙槽骨高度的降低,上中切牙牙周膜最大等效应力和主应力逐渐增大。
- Instaneous Center of Rotation(ICR) was analyzed by defining different M/F ratios applied at the center of clinical crown of the central incisor. 用三维有限元分析法研究作用于上颌中切牙托槽部位(距切缘4.;4mm)矫治力系统中力偶矩M与舌向水平力F的比值(即M/F)与牙齿移动瞬间转动中心((ICR)之间的关系。
- A scissor bite is preferred, but a level bite is acceptable. It is not unusual to see dropped (receding) lower central incisor teeth. 如剪刀状完全吻合的咬合是最好的,咬合稍微偏差一点是可以被接受的。但上下齿看起来不可以是明显地前后落差。
- Methods: A maxillary central incisor up tocriterion was selected to construct the three-dimensional finite element model on computer. 分析不同材料桩核的修复效果。
- Methods:A maxillary central incisor model was made by three dimensional finite element method based on the average anatomic morphology of Chinese. 方法:运用有限元法建立模型,观察模型的不同部位同一载荷下受力情况。
- It is successful to build a three-dimension finite element model of a maxillary central incisor by helix CT films and scanning data. 2. 在此基础上生成了包括桩冠各组成部分和支持组织的三维有限元模型,模型具有良好的几何相似和力学相似性,完全可用于不同箍设计桩冠的力学研究。
- Glioblastoma multiform is one of the most common types of primary central nervous system tumors with dismal prognosis. 摘要多形性脑胶质母细胞瘤是最常见的颅内肿瘤之一且预后差。
- Objective: To analyse MRI findings of primary central nervous system lymphoma (PCNSL) in immunocompetent patients. 摘要目的:探讨免疫功能正常人原发性中枢神经系统淋巴瘤(PCNSL)的常规MRI表现。
- METHODS: Spiral CT (SCT) scanning technology, digital image transfer and transcription were used to obtain the initial 3-D data of the upper central incisor. 方法:采用螺旋CT扫描、数字影像传输与转录方法,获得中切牙三维形态的原始数据。
- To investigate the clinicopathological features of primary central nervous sys-tem lymphoma(PCNSL). 探讨原发性中枢神经系统恶性淋巴瘤(PCNSL)的病理学特点。
- RESULTS: With the loss of the alveolar height, the maximum equivalent stress and the principle stress of the upper central incisor periodontium increased. 结果:随着牙槽骨高度的降低,上中切牙牙周膜最大等效应力和主应力逐渐增大。
- Compared with restoration with traditional clasp, the stress fringe value of mesial alveolar bone of central incisor was relatively higher in restoration with attachment. 与传统卡环修复体比较,附着体修复的中切牙近中牙槽嵴应力条纹级数相对较高。
- Objective:To study the clinical,radiological and pathological features of primary central nervous system lym-phoma(PCNSL). 目的分析原发性中枢神经系统淋巴瘤的临床和病理特征。
- Objective: To investigate clinical and histopathological factors of the prognosis of primary central nervous system lymphoma(PCNSL). 目的:从临床及组织病理学角度探讨原发性中枢神经系统淋巴瘤(PCNSL)的预后因素。
- Radiation therapy is one of the important treatment strategies for gliomas,the most common primary central nervous system tumors. 脑胶质瘤是最常见的神经系统原发肿瘤。放射治疗是目前脑胶质瘤综合治疗最重要的治疗手段之一。
- There was no evidence of an extracranial non-Hodgkin lymphoma, so the conclusion was that this represented a primary central nervous system lymphoma (PCNSL). 目前还没有颅外非霍奇金淋巴瘤的证据,而且这是一个原发性中枢神经系统淋巴瘤(PCNSL)的患者。
- Com BW,Marcus SM,Topham A,et al.Will primary central nervous system lymphoma be the most frequent brain tumor diagnosed in the year 2000?Cancer,1997,79(11):2409. 陈海玲;石群立;张泰和;等.;中枢神经系统原发性恶性淋巴瘤临床与病理