Inclusion Criteria:  > 18 years, healthy high cariogenic risk, Vital molars and premolars, Natural antagonist and proximal Indication of repair in the proximal with depth> 2mm.  Exclusion Criteria:  Patients has xerostomia either by taking medications known to produce xerostomia or those with radiation induced or Sjogren's syndrome patients -inability to perform hygiene pregnant women severe bruxism Prosthesis Not absolute isolation Tooth fracture and / or restoration.