Another tooth behind the back of the alveolar teeth needs to be treated according to the specific situation, if it is mainly six-age teeth during the tooth replacement period, adults may be wisdom teeth, which need to be observed, fossa closure, extraction and other treatments. 1. six-year-old teeth: if it is about six years old, after the groove of the teeth behind the growth of a tooth, may be children grow permanent teeth, after that will not appear to replace, can be observed without special treatment, if the fossa is deeper, need to do fossa sealing measures to prevent dental caries. 2. Wisdom teeth: adults have completed the stage of tooth replacement, permanent teeth after the growth of teeth for wisdom teeth, its position, shape may appear variations, so you need to go to the hospital to confirm the diagnosis of the teeth, the emergence of abnormalities need to be removed. In your daily life, you should pay attention to clean oral hygiene, regular oral examination, and consult a doctor in time when abnormalities occur.