Table 2. Push-out bond strength by type of post, type of cement, and by subgroup at each root level.

		N	Mean	SD	Minimum	Maximum
Root level	Post
Coronal	Parapost	24	6.62	7.33	0.12	24.58
	EverStick	24	8.88	6.64	0.68	26.59
Middle	Parapost	24	15.75	10.31	2.54	48.46
	EverStick	24	7.01	8.44	0.05	29.19
Root level	Cement
Coronal	Rely-X	24	10.83	5.93	0.28	24.58
	G-CEM	24	4.67	6.75	0.12	26.59
Middle	Rely-X	24	15.69	10.41	0.91	48.46
	G-CEM	24	7.07	8.38	0.05	24.80
Root level	Subgroup
Coronal	PF-R	12	10.88	7.63	0.28	24.58
	PF-G	12	2.36	3.83	0.12	14.29
	ES-R	12	10.78	3.92	2.77	15.24
	ES-G	12	6.97	8.30	0.68	26.59
Middle	PF-R	12	18.16	12.19	2.54	48.46
	PF-G	12	13.33	7.79	3.24	24.80
	ES-R	12	13.21	8.03	0.91	29.19
	ES-G	12	0.82	0.86	0.05	2.68