From: Impact of surgical management in cases of intraoperative membrane perforation during a sinus lift procedure: a follow-up on bone graft stability and implant success
Implant position
3
4
5
6
7
8
Perforation group
7.6%
23
25.0%
27
29.4%
30
32.6%
5.4%
0
0%
Control group
9
10.8%
20
24.1%
25
30.1%
21
25.3%
8.4%
1
1.2%