An 8 year old has 1st molar in a cusp-to-cusp relation. The treatment is:
When the deciduous second molars are in a fIush terminal plane, the permanent first molar erupts initially into a cusp-to-cusp relationship, which later transforms into a Class I molar relation using the primate spaces.
Later, cusp-to-cusp relationship of the permanent first molar can be converted to a Class I relationship by the mesial shift of the permanent first molar following exfoliation of the primary molar and thus making use of the Leeway space (late mesial shift).
Fixed appliance
Removable appliance
Continuous recall and observe
None of the above