牙缺失 meaning in English

anodontia
anodontism
loss of teeth

After being observed in 34 patients for 1 - 2 years , the ccbt retains perfect and the abutment teeth don ' t demonstrate removal
对34例不同牙缺失患者的使用，经1 ~ 2年观察，修复体固位良好，基牙未见松动和移位。
Methods : based on the 3 - d fea database of rpd , the stress state of the abutment and its periodontal tissue was analyzed to choose the optimal retainer with the same situation of dentural defect
方法：对个别牙缺失的病例设计不同固位体，在可摘局部义齿三维有限元模型库的基础上组建实验模型，通过三维有限元方法，分析牙周组织在不同情况下所受的应力大小。
Results the occlusion contact data and graph of wedge - shaped teeth defect had the features of trauma occlusion . 42 . 97 % of them has the larger axial gradient degree , 96 . 09 % of them has abration in different classes , 46 . 29 % missing the front teeth and 57 . 03 % missing the buccal teeth
方法采用临床物理检查和石膏模型测量，确定楔状缺损牙轴倾度、磨损指数、牙缺失等指标；采用计算机图像处理技术，自行编制软体程式及硬体系统，测试被检光（牙合）片，分析并提取楔状缺损牙接触（牙合）力、面积、接触点（牙合）应力等资料和图形信息。