Table 1.

Serum Wnt3a level in rat EP model (n = 8, $\overline{X}$ ± SD).

Time (wk)	SerumWnt3a (mg/L)
	N	P
2	1.233 ± 0.032	1.057 ± 0.023
4	1.457 ± 0.024	0.843 ± 0.057*,**
6	1.623 ± 0.052	0.531 ± 0.054*,**

*Compared with the data in the 2^nd week of modeling, significantly different, P < 0.05.

**Compared with group N, significantly different, P < 0.05.

EP = experimental periodontitis; SD = standard deviation.