Is it normal for the upper teeth to cover the lower teeth when the mouth is closed?

Under normal circumstances, it is typical for the upper teeth to overlap the lower teeth when the mouth is closed. This is a very common chewing pattern and usually does not cause any problems. The details are as follows:

The chewing pattern in which the upper teeth cover the lower teeth when the mouth is closed is known as a normal occlusal relationship—the optimal alignment of teeth and jaws. When we chew food, the upper and lower teeth fit tightly together to thoroughly grind the food, a process referred to as occlusion. If the upper teeth do not properly overlap the lower teeth, effective chewing may be compromised, potentially leading to food debris becoming trapped between teeth, which can contribute to bad breath, tooth decay, and other issues. Ideally, the contact area between upper and lower teeth should be evenly distributed, and the teeth should make proper contact during chewing to ensure efficient mastication. Abnormal occlusion may result in uneven tooth wear, jaw muscle pain, and similar problems. Therefore, if you notice an abnormal chewing pattern, it is advisable to consult a dentist to determine whether corrective treatment is needed.

In summary, the upper teeth overlapping the lower teeth when closing the mouth is a normal chewing pattern and generally not a cause for concern. However, if you suspect your bite is misaligned, it is best to seek advice from a dentist to determine whether treatment is necessary. Timely intervention can help maintain oral health and prevent potential dental problems.