乳牙; 蜕齿
deciduous teeth是什么意思
1. 乳牙：2.牙的分类 人的一生有两副牙齿,按萌出先后,分为乳牙(deciduous teeth)和恒牙(permanent teeth). 乳牙是在生后6个月开始萌出,6~7岁开始脱落,共20个;恒牙是在6~7岁开始萌出,替代乳牙,其中第3磨牙,又称迟牙或智牙(wisdom tooty),
2. 恒牙：口腔 permanent teeth | 恒牙 deciduous teeth | 乳牙 salivary gland
3. 乳齿,乳牙,暂牙,蜕齿：lar ==> 乳磨牙 | deciduous teeth ==> 乳齿,乳牙,暂牙,蜕齿 | deciduous tooth retention ==> 乳牙滞留
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1. Between four to eight months, puppies shed all their deciduous teeth and grow a new set of permanent teeth.