约百分之七的人口有一定的模式缺牙。
Approximately 7 percent of the population has some pattern of missing teeth.
结论：安氏II类2分类错牙合与过小侧切牙、釉质发育不良、先天缺牙密切相关。
Conclusion: Angle Class II division 2 malocclusion is closely related to congenital tooth anomalies.
至于她，她带着那种缺了两个牙的绝美的笑容向他微笑。
But she smiled on him with that sublime smile in which two teeth were lacking.
至于她，她带着那种缺了两个牙的绝美的笑容向他微笑。
But she smiled on him with that sublime smile in which two teeth were lacking.
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