For a number of years there has been an option to seal pits and fissures on the occlusal surfaces, which is assessed in the literature as being highly efficacious and effective (Splieth et al. 2010, Ahovuo-Saloranta et al. 2008, Griffin et al. 2008). It constitutes a vital component of the caries prevention approach especially in the event of an increased risk of caries (Hiiri et al. 2010). In recent years there has been an attempt to transfer this treatment concept to applications in the approximal area, in order to prevent unnecessary substance ablation. A fissure sealing resin and a dental adhesive were used for the first time in an attempt at creating a surface diffusion barrier (Gomez et al. 2008, Gomez et al. 2005, Paris et al. 2006, Martignon et al. 2006, Robinson et al. 2001). Coating the tooth surface in the approximal area with various plastic foils after tooth separation opened up a whole new treatment approach for dealing with these carious lesions (Alkilzy et al. 2010, 2009).