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Some of our 32 adult teeth are more vulnerable to decay and damage than others. Here, London dentist Dr Charles Ferber reveals where the dangers lie.
你知道吗？在成人的32颗恒牙中，有的牙齿要更容易遭受损伤和腐蚀，想要有一口漂亮又健康的牙齿，除了日常的清洁护理之外，还应对这一类“VIP牙”进行重点保护。
INCISORS
门牙
Incisors are the eight teeth at the front of your mouth — four at the top, four at the bottom.
门牙是分布于口腔下颚前方的八颗牙齿，四颗在上，四颗在下。
PROBLEMS: The central incisors are most vulnerable, but those in the lower jaw are particularly affected by teeth grinding, which 8 per cent of us do unconsciously.
问题：位于中央位置的门牙是非常容易受到腐蚀的，而下颚的门牙则直接则特别容易遭受磨损。
Your lower central incisors are more -yellow because the enamel is thinner, revealing the yellowish tissue (dentine) that gives teeth their strength.
下门牙很容易呈现出黄色，这是因为珐琅质较薄而露出了黄色的组织，也就是牙本质的“真面目”，而这样以外便使得下门牙异常的坚硬。
The inside of these incisors is also particularly prone to tartar because there are -salivary glands here. Minerals in saliva combine with plaque to form hardened tartar. A build-up of tartar can cause -irritation that gradually makes the gum and jawbone shrink.
但因为唾液腺位置的缘故，门牙上也非常容易有牙垢的出现。唾液中的矿物质在结合之后，会形成硬化的斑块牙垢，而当牙垢积累到一定的程度之后，可能会引起牙龈与颚骨的萎缩。
