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Table 1 Distribution of implant positions

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 7.6% 23 25.0% 27 29.4% 30 32.6% 5 5.4% 0 0%
Control group 9 10.8% 20 24.1% 25 30.1% 21 25.3% 7 8.4% 1 1.2%