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不同牙位和洞型对磨耗深度的影响
Wear depth of different tooth type and cavity type
| Items | Wear depth/μm, x±s | |||||
| Tooth type | Cavity type | |||||
| Premolar | Molar | Class Ⅰ | Class Ⅱ | |||
| BF group | ||||||
| 6 months | 40±13 | 45±16 | 51±16 | 40±13 | ||
| 18 months | 48±14 | 53±18 | 56±16 | 48±15 | ||
| 48 months | 53±17 | 66±27 | 64±21 | 57±23 | ||
| Mann-Whitney U test | P>0.05 | P>0.05 | ||||
| Z350 group | ||||||
| 6 months | 38±16 | 36±10 | 39±12 | 37±14 | ||
| 18 months | 50±20 | 45±10 | 46±13 | 47±16 | ||
| 48 months | 50±14 | 58±18 | 59±18 | 53±17 | ||
| Mann-Whitney U test | P>0.05 | P>0.05 | ||||
