<tt id="6hsgl"><pre id="6hsgl"><pre id="6hsgl"></pre></pre></tt>
          <nav id="6hsgl"><th id="6hsgl"></th></nav>
          国产免费网站看v片元遮挡,一亚洲一区二区中文字幕,波多野结衣一区二区免费视频,天天色综网,久久综合给合久久狠狠狠,男人的天堂av一二三区,午夜福利看片在线观看,亚洲中文字幕在线无码一区二区
          USEUROPEAFRICAASIA 中文雙語Fran?ais
          Lifestyle
          Home / Lifestyle / News

          At a glance

          By Liu Zhihua | China Daily | Updated: 2012-09-19 09:35

          Common dental diseases and prevention

          Tooth decay (dental caries)

          Dental caries is an infection caused by plaque, a sticky film on teeth formed from accumulated food debris. Bacteria found in plaque changes sugars into acids, which erodes the tooth enamel to form cavities. It is the most common problem affecting teeth.

          Proper oral hygiene - regular brushing, flossing and dental checkups - is the best prevention. The use of dental sealants is another means. Sealants are applied on newly erupted molars to stop food from collecting on the chewing surfaces. Regular follow-ups and checkups are necessary, because sealants can wear out and need to be replaced.

          Gum or periodontal diseases

          Gum disease is serious infection of the gums caused by invisible plaque, and if left untreated, can lead to tooth loss as the plague destroys the muscles and bones that hold teeth in place.

          At the mild stage (gingivitis), the gums become red, swollen, and bleed easily. There is usually little or no discomfort at this stage.

          With time, periodontitis sets in, when plaque hardens into tartar. Once tartar forms, it starts to destroy gum tissue and the gum weakens and form pockets around the base of the teeth. Eventually, the tissues and bone are broken down, and teeth will fall out. Often, this destructive process has very mild symptoms.

          Proper brushing and flossing daily can remove food debris that cause the start of the disease, and minimize the formation of plaque. Uneven teeth increase the chances of dental problems, and orthodontic treatment will correct that. Systemic conditions such as heart disease, respiratory disease, and diabetes are associated with gum disease.

          Regular visits to a dentist are necessary as even brushing and flossing cannot prevent plaque totally, and professional scaling may be needed.

          TIPS

          What you eat and how often you eat are important factors to dental health. Nuts, milk, crunchy fruits and vegetables, water are all good, while products with a large amount of sugar, such as candy and cookies, are poor choices. Carbonated drinks should also be avoided.

          If your gums bleed freely, are discolored or pulling away from your teeth, it is best to see a dentist at once. Other symptoms of bad dental health are bad breath or loose teeth.

          Copyright 1995 - . All rights reserved. The content (including but not limited to text, photo, multimedia information, etc) published in this site belongs to China Daily Information Co (CDIC). Without written authorization from CDIC, such content shall not be republished or used in any form. Note: Browsers with 1024*768 or higher resolution are suggested for this site.
          License for publishing multimedia online 0108263

          Registration Number: 130349
          FOLLOW US
          主站蜘蛛池模板: 日韩无矿砖一线二线卡乱| 国产区二区三区在线观看| 久久精品人妻少妇一区二| 熟妇女人妻丰满少妇中文字幕| 亚洲永久视频| 国产精品国三级国产av| 国模沟沟一区二区三区| 国产三级精品片| 欧美激情一区二区三区成人 | 欧美午夜理伦三级在线观看 | 骚虎视频在线观看| 亚洲精品香蕉一区二区| 欧美国产日韩亚洲中文| 蜜臀精品一区二区三区四区| 久久久久久久久久久久中文字幕 | 欧美高清一区三区在线专区| 亚洲高清av一区二区| 久久久久久亚洲综合影院| 久久se精品一区精品二区国产| 亚洲成av人片在www鸭子| 久久永久免费人妻精品下载| 91网站在线看| 欧美激情 亚洲 在线| 国产高清在线精品一区不卡| 无码日韩精品一区二区三区免费| 亚洲国产成人AⅤ片在线观看| 天堂av资源在线免费| 国产成人精品日本亚洲第一区| 国产在线精品中文字幕| 欧美熟妇xxxxx欧美老妇不卡| 亚洲av免费看一区二区| 亚洲国产成人片在线观看 | 国产一区在线观看不卡| 国产播放91色在线观看| 粗大猛烈进出高潮视频| 少妇被粗大的猛烈进出动视频| 国产91色综合久久高清| 国产精品免费视频网站| 国产va免费精品高清在线观看| 精品人妻av中文字幕乱| 国产午夜精品理论片小yo奈|