Teeth Grinding Wearing of the chewing surfaces if your teeth occurs normally throughout life at a slow pace. Just the friction of the upper and lower teeth moving against one another wears away your enamel. You don't notice it because it is such as low process. Though, you might notice that the biting surfaces if your lower incisors appear more yellow than they used to. Depending on your age, the yellow you are looking at is probably dentin (the layer under enamel). You may have also noticed that your upper front teeth are beginning to chip. The normal process of attrition can become greatly accelerated if your teeth don't fit together properly. In other words, if your normal bite is off to one side and not evenly balanced with the teeth interlocking, you can have problems with excessive loss of tooth structure. One out of every four adults falls into this category a some level. Grinding and clenching are usually a physical manifestation of stress. It occurs at night
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