表 4.

影响牙根发育的单因素分析

Statistical analysis of potential contributing factors of root development

Variables	Failed group (n=13)	Success group (n=55)	P
Age/years, x±s	9.69±2.56	10.56±1.90	0.170
Etiology, n			0.003
Broken central cusp	3	37
Trauma	10	14
Develop stage, x±s	8.00±0.41	7.91±0.62	0.523
Induced bleeding, n			0.014
Orifice of the root	2	26
Middle of the root	4	17
Tip of the root	7	12
Canal sealing material, n			0.322
Bioceramic materials	11	51
Glass ionomer cement	2	4
Period of canal sealing/d, x±s	42.00±30.37	36.83±23.26	0.501