Figure 1

Experimental set-up. Nitrogen leaks from chamber P1 to chamber P2 through the gap between implant (A) and abutment (B) and between the screw (C) and the abutment, then through a plastic tube (*) connecting the internal chamber of the implant with chamber P2. In the glass tube (green), the implant is sealed in epoxy adhesive (pink) and the tightness is ensured with wax (brown).