TetricCAD Crown Clinical Study

The study will be composed of 50 crowns placed in adult patients that have been identified as requiring at least one crown on a posterior tooth. A maximum of two crowns per patient will be completed. All the crowns will be made from the same resilient ceramic CAD/CAM block(Tetric CAD/Ivoclar Vivadent). The crowns are placed using an adhesive bonding process including a total etch process with a universal adhesive (Adhese by Ivoclar Vivadent) and dual-cured resin cement (Variolink Esthetic by Ivoclar Vivadent). The crowns are planned to be evaluated at 6 months, 1 year, 2 years, 3 years, and if funding permits, 4 years, and 5 years. At each appointment, an examination of the crown will be completed as well as clinical photographs, an intraoral digital scan, and impression of the crown.

Inclusion criteria

• must have at least one carious lesion or defective restoration or fractured tooth in a molar or premolar
• reason for restoration should extend more than one-half the intercuspal width of the tooth requiring a full crown restoration
• Teeth to be vital and asymptomatic prior to treatment
• No more than two restorations will be placed per patient. If a patient presents with more than two acceptable teeth for the study, molar teeth will be included prior to premolar teeth.

Exclusion criteria

• Devital or sensitive teeth
• Teeth with prior endodontic treatment of any kind
• Teeth with a history of direct or indirect pulp capping procedures
• Patients with significant untreated dental disease to include periodontitis and rampant caries
• Pregnant or lactating women
• Patients with a history of allergies to any of the materials to be used in the study
• Patients unable to return for the recall appointments