| 释义 |
primary tooth
noun[ C ]
anatomy specializeduk /ˈpraɪ.mər.i ˌtuːθ/ us /ˈpraɪ.mer.i ˌtuːθ/pluralprimary teethuk /ˈpraɪ.mər.i ˌtiːθ/ us /ˈpraɪ.mer.i ˌtiːθ/
any of the teeth of young children and some young animals that fall out and are replaced by permanent teeth:
Humans usually have 20 primary teeth and 32 permanent teeth.
Primary teeth erupt into the mouth from around six months until two years of age.
The premature loss of primary teeth by caries disease is very common in Brazilian children.
The permanent teeth begin to erupt, and replace the primary teeth, at 6 years of age.
Three-quarters of the patients had failure or delay of primary tooth shedding.
SMART Vocabulary: related words and phrases
The teeth
baby tooth
buck-toothed
cementum
centric
cingulum
coronal
erupt
hydroxyapatite
interdental
labially
lingually
mesially
milk tooth
molar
pulpal
rictus
snaggle-toothed
snaggled
through clenched teeth
wisdom tooth
Synonyms
baby tooth deciduous tooth milk tooth Comparepermanent tooth
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