邮票分撕不慎造成的齿尖残损、掉缺现象，为缺齿。
... ·牙脱落[odontoptosis (lose a tooth)] ·缺齿[missing teeth] ·残根[residual root] ...
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该设备用于检测齿轮齿面的质量缺陷：裂痕，缺齿等。
The equipment is used for the detection of gear quality defects: crack, missing teeth, etc.
弯曲或不成一线的牙齿是允许的，但缺齿属于严重缺陷。
A crooked or out of line tooth is permissible, however, missing teeth are to be severely faulted.
术前诊断依据齿突基底部缺如的影像学表现。
The diagnosis prior to surgery was based on radiography that documented the caudal portion of the odontoid absent.
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