双语字幕
Dental Cavity
龋齿
Dental cavities or caries is one of the most common of all disorder. It is an infection caused by a combination of carbohydrate-containing foods and bacteria that live in our mouth.
蛀牙或龋齿是最常见的疾病之一。它是由含碳水化合物的食物和口腔内的细菌共同作用造成的一种感染。
When these bacteria find carbohydrates, they consume them to produce acids. The acids demineralize the hard part of the tooth, enamel and dentin, and eventually reach the pulp chamber.
当口腔内的细菌发现碳水化合物时，它们将消耗这些碳水化合物，来产生酸。然后酸使牙齿的坚硬部分，牙釉质和牙本质脱矿，最终到达牙髓腔。
The bacteria are contained in a film called plaque. Plaque begins to accumulate on the teeth within 20 minutes after eating. If the plaque is not removed thoroughly and routinely, tooth decay will occur.
细菌被包裹在称为牙菌斑的薄膜中。进食后 20 分钟内，牙菌斑开始在牙齿上堆积。如果不彻底和定期清除牙菌斑，就会发生龋齿。
Treatment of a cavity generally consists of two steps:
龋齿的治疗通常包括两步：
removing the decayed portion of the tooth, under local anesthesia, a high-speed dental drill is used to remove the decay and prepare the tooth for the filling, rebuilding the missing tooth structure with a suitable filling material.
去除牙齿的龋坏部分，在局部麻醉下，使用高速牙钻磨除蛀牙，并准备牙齿进行填充治疗；用合适的填充材料重建缺失的牙齿结构。
相关单词学习
Enamel
①发音和释义
e•nam•el/ɪˈnæml/n. 釉质
The hard, calcareous substance covering the exposed portion of a tooth.
（图源：太帅图库）
Plaque
plaque/plæk/n. 牙菌斑
Dental plaque.
（图源：太帅图库）
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《常见口腔疾病及治疗》（课时：35）
应用精美动画，讲解牙瘘管、牙脓肿、牙颈部疼痛、牙槽炎、牙根打桩、窝沟封闭、窝沟龋、拔牙，龈上洁治等内容。
A good beginning is half done.
良好的开端是成功的一半。
