bacteria sperm

Studies confirm no known material can prevent bacterial leakage into the implant screw access channel.

So what now?

Microbial colonization and consequent peri-implant tissue inflammation still constitutes a major concern since they are strongly associated with the early and late failure of dental implants (Palma-Carrio et al. 2011; Sakka et al. 2012).

In the screw-retained restorations, the hollow spaces resulting from the abutment screw access may also act as channels and reservoirs, harbouring and favouring the colonization of microbial species present in the oral biofilm. In the past, studies proved the existence of this bacterial leakage along the access hole of the abutment (Quirynen & van Steenberghe 1993; Quirynen et al. 1994; Guindy et al. 1998).

bacteria leakage

For this reason, the material used to seal the screw access channel and protect the abutment screw during the provisional time or in the definitive restoration is an important issue.

Materials such as cotton, gutta-percha, vinyl polysiloxane, polytetrafluoroethylene tape, autopolymerizing acrylic resin, and composite resin have been used in protecting the abutment screw head and promoting the sealing of access hole (Adrian et al. 1991; Taylor et al. 2004; Weininger et al. 2008).

None of these sealing materials prevented microbial leakage through the abutment screw access channel and moderate to high quantity pathogenic and nonpathogenic microbial species were detected in the inner parts of the implants in all cases. (Nascimento C, Pita MS et al – 2015)

Park et al. (2012) evaluated the levels of fluids leakage through the access holes of screw-retained implant prostheses sealed with cotton, silicone, vinyl polysiloxane, or gutta-percha. All materials failed to prevent fluid leakage.

manky cotton

Silverplug® is the solution.

silverplug in use

SilverPlug® is designed to fit any screw chamber and stays active for the life of the patient.

It is made from a polymer containing silver zeolite which has an antibacterial action, preventing the build-up of anaerobic bacteria, thereby preserving the surrounding soft tissues from an inflammatory response.


  • Easy to use / place
  • One size fits all
  • Easy to remove
  • Low cost – around £6 per abutment