When sealing with a cover screw a flat-head screw is placed inside, so the gum above it can be completely sealed. The benefit of this method is that the cover screw is deep underneath, and completely sealed by, the gums allowing the wound to heal without complications and minimising the risk of infections. The downside of this solution is that another surgical intervention (viz. the exposure of implants) will be necessary one month before the fabrication of the permanent tooth replacement, during which the gums are exposed and the implants are identified individually, and the cover screws are unscrewed and gingiva formers (healing abutments) are screwed into their place. Now the gums require another healing period so that the precision impressions can be taken from a fully healed gum level.
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