【单选题】【消耗次数：1】
牙齿萌出各项中正确的是
①
早萌乳牙牙根已经形成不易脱落
②
婴儿牙槽嵴上的“马牙子”应尽快去除
③
诞生牙的牙根尚未形成应早拨除
④
诞生牙多是多生牙
⑤
牙齿过早萌出应尽快拨除
参考答案：
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相关题目
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根据Cawood & Howell牙槽骨分类，Ⅳ类牙槽骨指的是（）
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天然牙存在时的牙槽骨
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刃状牙槽嵴，高度充分、宽度不足
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