Ceramic Versus Composite in the Treatment of Posterior Teeth by Inlays or Onlays

Inclusion criteria : * patient aged 18-70,who tolerates restorative procedures and presents a moderate-sized dental caries or restoration (that needs to be replaced) necessitating an inlay/onlay restoration. Exclusion criteria : * allergy to one of the materials employed, bruxism, severe or acute periodontal or carious disease, poor oral hygiene * Tooth presents a mobility \> II, a periodontal socket \> 3mm or supports a removable partial denture Randomization criterium : * tooth necessitates an inlay-onlay restoration after caries or former restoration removal Exclusion from randomization criteria : * subgingival margin after cavity preparation, rubber dam cannot be placed, all tooth cuspids need to be covered by the restoration.