Clinical Study of a 3D Shaded Zirconia for Chairside CAD/CAM Restorations

Inclusion Criteria

• •Adult aged 18-75 years.
• •Willing and able to sign and date the informed consent form and the HIPAA form.
• •Onlays and Crowns: Each patient should have at least one carious lesion, defective restoration, or fractured portion of the tooth to be restored on a maxillary or mandibular premolar or molar tooth. Each lesion, fracture, or defective restoration should exhibit sufficient size or loss of tooth structure requiring an onlay or crown restoration. The tooth should have at least one opposing tooth in occlusion and one adjacent tooth with an intact proximal contact. No more than eight teeth that are endodontically treated and restorable with an onlay or crown may be included in the study. All remaining teeth in the study will test vital and be asymptomatic at the beginning of 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.
• •Fixed Partial Dentures (FPDs): Each patient should have at least one missing tooth, either anterior or posterior, that is appropriate for replacement with a fixed partial denture. Abutment teeth will have healthy periodontal status with at least a 1:1 crown:root ratio. The FPD should have at least two opposing teeth in occlusion and one adjacent tooth with an intact proximal contact. Both abutment teeth must be asymptomatic prior to treatment. Endodontically treated teeth will be acceptable for abutments if nonmetallic cores can be placed to retain the FPD. FPDs may include 3 or 4 teeth as indicated by the clinical situation but must be within the 43 mm span of the mill block to manufacture it as described later. The patient cohort should include a mix of non-endodontically as well as endodontically treated teeth.