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The ABCs of veterinary dentistry: *S' is for supernumerary teeth

机译：兽医牙科的ABC：* s'是占星牙

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I had no idea what "supernumerary" meant (much less how to spell it) when I first heard the term some 30 years ago. But time and experience have taught me the importance of paying attention to this dental condition that often needs immediate care.Both extra and supernumerary teeth refer to the same medical condition—hyperdontia—which describes when teeth or odontogenic structures are formed from tooth germs in excess of the usual number for any given region of the dental arch. It's thought thatthese teeth develop from either a cleaved tooth bud caused by hyperactivity of dental lamina near the regular tooth bud or from splitting the regular tooth bud itself. Heredity may also play a role in this anomaly, as supernumeraries often occur in littermates of affected dogs and cats.Supernumerary teeth may be single or multiple, unilateral or bilateral, and erupted or impacted. The condition is less common in deciduous (baby) teeth than in permanent teeth.
机译：当我第一次听到大约30年前的术语时，我不知道“超值”意味着什么（少数人如何拼写它）。 但是，时间和经验教会了我注意这种牙科病症的重要性，这些病症通常需要立即护理。额外和上数牙齿指的是相同的医疗条件 - 超畸形 - 这描述了牙齿或幼儿组成结构从多余的牙胚形成时 牙弓的任何给定区域的通常编号。 它认为，这些牙齿从由牙齿薄膜靠近常规牙齿芽附近的牙齿薄膜和分裂常规牙芽本身的裂缝引起的牙齿。 遗传也可能在这种异常中发挥作用，因为占星症经常发生在受影响的狗和猫的凋落物中。楚氏牙齿可以是单个或多个，单侧或双侧的，并且爆发或受影响。 这种情况在落叶（婴儿）牙齿中的常见不如永久牙齿。

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