Fig. 1From: Selection of 1-mm venting or 2.5-mm screw access holes on implant crowns based on cement extrusion and retention capacityImplant crowns with venting and screw access holes of different diameters. A, B, C: anterior crowns; D, E, F posterior crowns. Specimens from left to right: crowns with no hole (NH), crowns with a 1-mm mini venting hole (MH), and crowns with a 2.5-mm regular screw access hole (RH)Back to article page