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換牙時,兒童用舌頭舔牙有什麽危害?在乳恒牙替換時,如果兒童經常用舌尖舔松動的乳牙、乳牙殘 根或初萌的恒牙,就形成了伸舌或舔牙習慣。伸舌時,舌尖伸在h 下牙之間,形成局部開稔。有時舌頭前伸,帶動下颔向前,造成下 領前突畸形.舔牙時诃使下前牙唇向傾斜,出現牙間隙,甚至形成 反粉.如果同時舔上下前牙,則容易形成雙牙弓或雙鎮前突.
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