| 词汇 | primary-tooth |
| 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. 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 Synonymsbaby tooth deciduous tooth milk tooth Comparepermanent tooth |
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