Clinical Evaluation of Full Contour Zirconia Chairside CAD/CAM Crowns
Ivoclar Vivadent AG
Summary
This investigation will be a randomized, prospective, longitudinal clinical trial to study the clinical performance of a new monolithic, zirconia material with shade, translucency and material graduation for chairside CAD/CAM crowns. The restorations will be luted either with a self-adhesive luting material or a conventional cement. The crowns will be evaluated for a period of two years.
Eligibility
- Age range
- 18+ years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * at least 18 years of age * 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 a full crown restoration. * tooth should have at least one opposing tooth in occlusion and one adjacent tooth with an intact proximal contact * No more than ten teeth that are endodontically treated may be included in the study, equally divided between the two groups of crowns.…
Interventions
- DeviceCrowns self-adhesively luted
After cavity preparation, the zirconia chairside crown will be placed using SpeedCEM Plus. The excess will be light cured with Bluephase G4 in PreCure mode (950 mW/cm\^2). After removal of the excess, the luting material margins will be light-cured again for 20s (1200 mW/cm\^2).
- DeviceCrowns conventionally cemented
After cavity preparation, the zirconia chairside crown will be placed using ZirCAD Cement. The excess cement will be removed in the gel phase, either following light curing (5 - 10 seconds per segment) or following self-curing (approximately 2 min after placement). The restoration will be held in position during final curing that is complete 4 min 30 s after placement.
Location
- University of Michigan School of DentistryAnn Arbor, Michigan