Table 4.

Univariate analysis of marginal bone loss from implant insertion to the 5-year follow-up (n.e.o.: not enough observations).

Variable	n	Mean (in mm)	Standard Deviation	p-Value
Gender
female	23	0.87	0.78	0.645
male	25	0.76	0.78
Jaw type
mandible	32	0.78	0.79	0.680
maxilla	15	0.89	0.78
Ant-post
posterior implants	44	0.81	0.79	0.855
anterior implants	3	0.87	0.63
Implant diameter in mm
3	6	1.05	0.57	0.205
4	29	0.89	0.83
5	12	0.50	0.71
Implant length in mm
9	15	1.14	0.78	0.071
12	28	0.72	0.71
14	4	0.25	0.93
Bone quality
1 and 2	36	0.78	0.77	0.207
3	11	1.05	0.79
Bone quantity
A	20	0.65	0.79	0.245
B and C	27	0.93	0.76
Anchorage
no cortical	2	0.60	0.57	n.e.o.
monocortical	42	0.80	0.81
bicortical	3	1.07	0.60
Grafting
no	22	0.82	0.66	0.987
yes	25	0.75	0.81
Flap design
w/o releasing incisions	39	0.86	0.80	0.477
w releasing incisions	8	0.65	0.60
Torque
> 30 ≤ 35 Ncm	32	0.94	0.78	0.064
> 35 Ncm	15	0.55	0.72