How is the eruption described in the primary account

The process of tooth developing is called tooth eruption.The primary eruption is the first satge of tooth eruption. It typically starts from around six months, and lasts until the first permanent molars appear in the mouth, usually at six years. There are 10 primary teeth. Theythey typically erupt in the following order:
1. central incisor
2. lateral incisor,
3. first molar
4. canine
5. second molar
The primary eruption is followed by the stage: mixed eruption and than the permanent stage. 

Answer carbon dioxide ice;

The name may be in importnce  to them