挑选牙膏需要注意什么
<p><span word="Fancy">Fancy</span> <span word="toothpastes">toothpastes</span> <span word="may">may</span> <span word="come">come</span> <span word="in">in</span> <span word="different">different</span> <span word="colors">colors</span> <span word="and">and</span> <span word="boast">boast</span> <span word="unusual">unusual</span> <span word="ingredients">ingredients</span>, <span word="but">but</span> <span word="they">they</span> <span word="probably">probably</span> <span word="don">don</span>'<span word="t">t</span> <span word="offer">offer</span> <span word="better">better</span> <span word="dental">dental</span> <span word="health">health</span> <span word="than">than</span> <span word="the">the</span> <span word="average">average</span> <span word="drugstore">drugstore</span> <span word="toothpaste">toothpaste</span>. <span word="Here">Here</span>'<span word="s">s</span> <span word="what">what</span> <span word="to">to</span> <span word="look">look</span> <span word="for">for</span> <span word="if">if</span> <span word="you">you</span> <span word="try">try</span> <span word="a">a</span> <span word="new">new</span> <span word="brand">brand</span>:</p><p>高档牙膏可能有不同的颜色、独特的成分，但它们对牙齿健康所起的作用并不一定比药店售卖的普通牙膏更好。如果你想换个牌子，应注意下列事项。</p><p><span word="Abrasives">Abrasives</span></p><p>磨擦剂</p><p><span word="Toothpastes">Toothpastes</span> <span word="provide">provide</span> <span word="a">a</span> <span word="little">little</span> <span word="mechanical">mechanical</span> <span word="help">help</span> <span word="with">with</span> <span word="scrubbing">scrubbing</span>; <span word="that">that</span>'<span word="s">s</span> <span word="the">the</span> <span word="main">main</span> <span word="reason">reason</span> <span word="they">they</span> <span word="exist">exist</span>. <span word="Particles">Particles</span> <span word="of">of</span> <span word="grit">grit</span> <span word="help">help</span> <span word="to">to</span> <span word="scrape">scrape</span> <span word="bacterial">bacterial</span> <span word="plaque">plaque</span> <span word="from">from</span> <span word="your">your</span> <span word="teeth">teeth</span>. <span word="Some">Some</span> <span word="common">common</span> <span word="abrasives">abrasives</span> <span word="include">include</span> <span word="calcium">calcium</span> <span word="carbonate">carbonate</span>, <span word="silica">silica</span>, <span word="aluminum">aluminum</span> <span word="oxide">oxide</span>, <span word="and">and</span> <span word="magnesium">magnesium</span> <span word="carbonate">carbonate</span>. <span word="Charcoal">Charcoal</span> <span word="can">can</span> <span word="also">also</span> <span word="act">act</span> <span word="as">as</span> <span word="an">an</span> <span word="abrasive">abrasive</span>, <span word="but">but</span> <span word="some">some</span> <span word="dentists">dentists</span> <span word="caution">caution</span> <span word="that">that</span> <span word="charcoal">charcoal</span> <span word="can">can</span> <span word="be">be</span> <span word="too">too</span> <span word="harsh">harsh</span>.</p><p>牙膏中的粉状磨擦剂在牙刷来回抽动下机械地刷除牙渍，所以牙膏会含有磨擦剂。磨擦颗粒有助于刷除牙菌斑。常见的磨擦剂包括碳酸钙、二氧化硅、氧化铝和碳酸镁。木炭也可以用作磨擦剂，但有些牙医警告称，木炭可能太过刺激</p><p><span word="Fluoride">Fluoride</span> <span word="or">or</span> (<span word="maybe">maybe</span>) <span word="an">an</span> <span word="alternative">alternative</span></p><p>氟化物或可能的替代品</p><p><span word="Bacteria">Bacteria</span> <span word="are">are</span> <span word="constantly">constantly</span> <span word="dissolving">dissolving</span> <span word="your">your</span> <span word="teeth">teeth</span>, <span word="and">and</span> <span word="your">your</span> <span word="teeth">teeth</span> <span word="are">are</span> <span word="constantly">constantly</span> <span word="trying">trying</span> <span word="to">to</span> <span word="build">build</span> <span word="themselves">themselves</span> <span word="back">back</span> <span word="up">up</span>. (<span word="Your">Your</span> <span word="saliva">saliva</span> <span word="naturally">naturally</span> <span word="contains">contains</span> <span word="calcium">calcium</span> <span word="to">to</span> <span word="aid">aid</span> <span word="in">in</span> <span word="this">this</span> <span word="process">process</span>.) <span word="This">This</span> <span word="process">process</span>, <span word="called">called</span> <span word="remineralization">remineralization</span>, <span word="is">is</span> <span word="helped">helped</span> <span word="along">along</span> <span word="by">by</span> <span word="fluoride">fluoride</span>. <span word="All">All</span> <span word="toothpastes">toothpastes</span> <span word="that">that</span> <span word="have">have</span> <span word="an">an</span> <span word="American">American</span> <span word="Dental">Dental</span> <span word="Association">Association</span> <span word="seal">seal</span> <span word="must">must</span> <span word="contain">contain</span> <span word="fluoride">fluoride</span>.</p>
页:
[1]