Is one-stage lateral sinus lift and implantation safe in severely atrophic maxillae? Results of a comparative pilot study

International Journal of Implant Dentistry

Table 1 Diagnostic and surgical characteristics of the study population

	Residual height, binary		p-value
	< 3 mm [n = 63]	≥ 3 mm [n = 40]	p-value
Height of residual bone (mm)
Mean	2.198	3.89	< 0.001
Std. deviation	0.577	0.966
Boneloss (mm)
Mean	0.310	0.288	0.906
Std. deviation	0.931	0.9138
Follow-up years
< 1 year [n = 10]	6	4	0.232
1–2 years [n = 16]	6	10
2–3 years [n = 18]	13	5
3–4 years [n = 14]	6	8
4–5 years [n = 15]	11	4
5–6 years [n = 10]	6	4
6–7 years [n = 13]	10	3
7–8 years [n = 7]	5	2
Type of augmentation material
Xenogeneic [n = 70]	46	24	0.197
Autogenous [n = 33]	17	16
Augmentation material
Endobon [n = 48]	29	19	0.505
BioOss [n = 8]	6	2
Osteopure [n = 6]	5	1
Endobon + autogenous bone [n = 41]	23	18
Type of membrane
Osseoguard [n = 85]	55	30	0.120
Ossix [n = 18]	8	10
Type of implant
Astra EV [n = 59]	33	26	0.176
Astra TX [n = 39]	28	11
Straumann [n = 5]	2	3
Type of provisorium
Crown [n = 66]	39	27	0.783
Bridge [n = 30]	19	11
Complete denture [n = 7]	5	2

P-values were obtained from t-tests when comparing metric variables or from Chi-squared tests when testing the independence of categorical variables