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- The maxillary second premolar is one of two teeth located in the upper maxilar, laterally (away from the midline of the face) from both the maxillary first premolars of the mouth but mesial (toward the midline of the face) from both maxillary first molars. The function of this premolar is similar to that of first molars in regard to grinding being the principal action during mastication, commonly known as chewing. There are two cusps on maxillary second premolars, but both of them are less sharp than those of the maxillary first premolars. There are no deciduous (baby) maxillary premolars. Instead, the teeth that precede the permanent maxillary premolars are the deciduous maxillary molars. In the universal system of notation, the permanent maxillary premolars are designated by a number. The right permanent maxillary second premolar is known as "4", and the left one is known as "13". In the Palmer notation, a number is used in conjunction with a symbol designating in which quadrant the tooth is found. For this tooth, the left and right second premolars would have the same number, "5", but the right one would have the symbol, "┘", underneath it, while the left one would have, "└". The international notation has a different numbering system than the previous two, and the right permanent maxillary second premolar is known as "15", and the left one is known as "25". (en)
- 上顎第二小臼歯（じょうがくだいにしょうきゅうし、maxillary second premolar）とは、上顎歯列で第一小臼歯の遠心側に隣接する歯のこと。正中から五番目にあることから上顎5番ともいう。近心側隣接歯は上顎第一小臼歯、遠心側隣接歯は上顎第一大臼歯、対合歯は下顎第二小臼歯と下顎第一大臼歯である。歯冠が完成するのは6-7歳時、萌出は10-12歳、歯根完成は12-14歳の時である。 (ja)
- I premolari superiori hanno la caratteristica di essere simili tra loro, e disposti in serie discendente: il secondo è dunque più piccolo del primo, a differenza degli inferiori. Possiedono due cuspidi di misura pressoché equivalente. Il secondo premolare superiore ha mediamente un'altezza di 22.5 mm, di cui 8.5 coronali e 14 radicolari, ed un diametro mesiodistale piuttosto stretto (7 mm), e uno vestibolo-palatale di 9 mm, come il primo premolare superiore. (it)
- O Segundo pré-molar superior é um dente inserido osso maxilar. (pt)
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- Maxillary second premolars of permanent teeth marked in red. There are no premolars in primary teeth. (en)
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- Maxillary second premolar (en)
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- 上顎第二小臼歯（じょうがくだいにしょうきゅうし、maxillary second premolar）とは、上顎歯列で第一小臼歯の遠心側に隣接する歯のこと。正中から五番目にあることから上顎5番ともいう。近心側隣接歯は上顎第一小臼歯、遠心側隣接歯は上顎第一大臼歯、対合歯は下顎第二小臼歯と下顎第一大臼歯である。歯冠が完成するのは6-7歳時、萌出は10-12歳、歯根完成は12-14歳の時である。 (ja)
- I premolari superiori hanno la caratteristica di essere simili tra loro, e disposti in serie discendente: il secondo è dunque più piccolo del primo, a differenza degli inferiori. Possiedono due cuspidi di misura pressoché equivalente. Il secondo premolare superiore ha mediamente un'altezza di 22.5 mm, di cui 8.5 coronali e 14 radicolari, ed un diametro mesiodistale piuttosto stretto (7 mm), e uno vestibolo-palatale di 9 mm, come il primo premolare superiore. (it)
- O Segundo pré-molar superior é um dente inserido osso maxilar. (pt)
- The maxillary second premolar is one of two teeth located in the upper maxilar, laterally (away from the midline of the face) from both the maxillary first premolars of the mouth but mesial (toward the midline of the face) from both maxillary first molars. The function of this premolar is similar to that of first molars in regard to grinding being the principal action during mastication, commonly known as chewing. There are two cusps on maxillary second premolars, but both of them are less sharp than those of the maxillary first premolars. There are no deciduous (baby) maxillary premolars. Instead, the teeth that precede the permanent maxillary premolars are the deciduous maxillary molars. (en)
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- Secondo premolare superiore (it)
- Maxillary second premolar (en)
- 上顎第二小臼歯 (ja)
- Segundo pré-molar superior (pt)
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- Maxillary second premolar (en)
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