Inclusion Criteria:  Patients and parent of the patients who accept to participate and sign the informed consent Patients who have at least two permanent molars with caries that require crown restoration Patients that have good cooperation to the procedure  Exclusion Criteria:  Patients and parent of the patients who don't accept to participate and sign the informed consent Teeth that doesn't have opposing permanent molars Patients who have bruxism or deep-bite Patient who are allergic to nickel