Figure 1 Kaplan Meier survival function by baseline ART regimen

Male	5
Female	7
Avarage age	56,08 (40-67)
Smokers (less than 20 sigarettes a day)	4
Diabetes	1
Implant length 11,5 mm	8
Implant length 13 mm	4
Implant diameter 4,3	4
Implant diameter 3,7	8
Insertion torque	> 35 N
ISQ	> 60

Table 1. Patients distributed by main characteristics of the study. For each patient an intraoral Rx was performed at each time: T0 – Surgery day after screwing the definitive abutment and cementing provisional crown T1 – 3 months after surgery, when definitive prothesization was concluded T2 – 6 months after surgery T3 – 12 months after surgery

T0	T1	T2	T3
1	0.2	0.2	0.2
2	0.5	0.55	0.5
3	0.2	0.2	0.2
4	0.4	0.35	0.35
5	0.3	0.3	0.3
6	0.3	0.3	0.3
7	0.6	0.55	0.6
8	0.4	0.4	0.4
9	0.35	0.4	0.4
10	0.4	0.4	0.4
11	0.45	0.45	0.4
12	0.2	0.2	0.2
Avarage± DS	0.35	0.35	0.35
Range	0.2-0.6	0.2-0.55	0.2-0.6

Table2

Study and year	Type of abutment		6 months	1 year
Sapienza study 2014	DA	Non post-extractive	0,35	0,35
Cooper LF. et al. 2010	PA			0.4
Oyama K. et al. 2012	PA		0.28	0.38
Grandi et al. 2014	DA	Post-extractive	-	0.11
Grandi et al. 2014	PA		-	0.58
Canullo et al. 2010	DA		0.35(3months)	0.33(1.5years)
Canullo et al. 2010	PA		0.36(3months)	0.43(1.5years)

Table3 Datas concerning crestal bone reabsorption in different studies analyzed in literature are shown, compared to the datas of this study.