At what age does deep overbite become fixed?

In general, deep overbite becomes fixed around the age of 18. The detailed explanation is as follows:

Deep overbite is a common dental abnormality characterized by excessive vertical overlap of the upper teeth over the lower teeth when the jaws are closed, also known as "deep overjet." As individuals grow and develop, their teeth and bones undergo continuous changes. By the age of 18, dental and skeletal development is largely complete, which is why deep overbite typically stabilizes around this age. Deep overbite may result from various factors including genetics, poor oral development, or incorrect bite patterns, and can lead to multiple problems such as tooth wear, chewing difficulties, and temporomandibular joint (TMJ) pain. Therefore, timely medical intervention is necessary.

Generally, deep overbite is more commonly seen during adolescence. If deep overbite is detected, early treatment is recommended. At this stage, the jawbones and teeth are still developing, so appropriate treatment can effectively correct abnormal tooth alignment and promote healthy development of the teeth and jaws.