NCT02272491.

Trial name or title	'Monolithic zirconia crowns for single implants in the molar region: a multicenter randomized controlled clinical trial'
Methods	Randomised, parallel‐group study
Participants	80 adult patients in need of molar implant‐supported single crowns
Interventions	Group 1: ZrO2 crown (Straumann CARES) The monolithic zirconia crown (Straumann CARES Full Contour Zerion HT) will be bonded to the titanium base (Straumann CARES Variobase Abutment RN) Group 2: PFM crown (Straumann Gold) Porcelain‐fused‐to‐metal crown consisting of a gold abutment, a gold core, and veneering ceramic
Outcomes	"The primary outcome of the study is the technical complication rate. This outcome represents an indicator for the prosthetic success of the implant‐supported crown. The main biological secondary outcomes are marginal bone level, histological signs of inflammation, and presence of pathogenic bacteria. Further outcomes are crown survival, wear of the crown and of the antagonist"
Starting date	October 2014
Contact information	research.kbtm@zzm.uzh.ch
Notes