婴幼儿牙齿变黑是怎么回事容易

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北京市目前一共有300个左右气象监测站。林克庆介绍 SCRIPT LANGUAGE=\"JavaScript1.1\" var browVersion = parseInt(pVersion);if (pName==\"Netscape\" amp; amp; browVersion =4) ite(\" SCR\"+\"IPT LANGUAGE=\\\"Javascript1.1\\\" SRC=\\\"\" \\/SCR\"+\"IPT \"); /SCRIPT

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钙是构成牙釉质的主要物质，婴幼儿缺钙使牙釉质粗糙凹凸不平，易残留食物碎屑。口腔中的乳酸杆菌附在釉质表面形成菌斑，菌斑内的细菌不断分解食物，产生大量的有机酸，腐蚀釉质发育不全的牙齿，牙齿的颜色由白色逐渐变褐、变黑，一点点脱落。婴幼儿及时补钙可有效预防的发生。

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