Table 4.

Survival rate and number of implants depending on the investigation interval (implant level in the maxilla)

Investigation interval (months)	Number of implants	Failed implants	Survival rate intervals (%)
0 < , ≤ 12	1324	15	100–98.9
12 < , ≤ 24	1309	4	98.9–98.6
24 < , ≤ 36	1305	1	98.6–98.5
36 < , ≤ 48	1304	0	98.5
48 < , ≤ 60	1222	0	98.5
60 < , ≤ 72	1116	0	98.5
72 < , ≤ 84	978	0	98.5
84 < , ≤ 96	835	0	98.5
96 < , ≤ 108	693	0	98.5
108 < , ≤ 120	552	0	98.5
120 < , ≤ 132	449	0	98.5
132 < , ≤ 144	403	0	98.5
144 < , ≤ 156	351	0	98.5
156 < , ≤ 168	253	0	98.5
168 < , ≤ 180	180	2	98.5–97.4
180 < , ≤ 192	68	0	97.4
192 <	8	0	97.4