When is the best time for fossa closure?
Normal oral cavity has 28 to 32 teeth. The four first permanent molars, namely the sixth instar teeth, that need to be closed are at the age of 6, and the four second molars, which are at the age of 12, are at the last side of the mouth.
Due to developmental reasons, the eruption time of the sixth instar teeth varies from person to person, but generally, 90% of children will fully erupt between the ages of 7 and 9 years. Therefore, children should also seal the fossa and sulcus for the first time during this period.
However, fossa closure is not suitable for every child.
Fossa and furrow closure is not recommended in four cases: the fossa and furrow of the occlusal surface are shallow, without deep fossa and furrow point gap, and the self-cleaning effect is good;
Patients with more adjacent caries lesions;
Tooth eruption more than 4 years without caries or completed filling teeth;
The teeth have not erupted normally and are covered by the gums.
Of course, these situations are not generally judged by parents, and should be diagnosed by dentists.
