Table 2 The status of first permanent molars (FPMs) in schoolchildren aged 6–8 years in Hangzhou, China
Index | Number of FPMs | Percentage (%) |
|---|---|---|
Eruption stage | ||
Fully erupted with occlusion established | 14,229 | 63.58 |
Fully erupted without the establishment of occlusion | 3472 | 15.51 |
NOT fully erupted and were covered with a gingival flap | 1993 | 8.91 |
The cusps just break through the gums | 502 | 2.24 |
Not erupted | 2184 | 9.76 |
Pit and fissure sealing of the fully erupted FPMs | 1168 | 6.60 |