NCT03039985.

Trial name or title	'All‐ceramic crowns in patients with sleep bruxism ‐ a randomized clinical trial'
Methods	Randomised, parallel‐group study
Participants	100 patients in need of a single molar crown
Interventions	Group 1: monolithic zirconia molar crowns (Prettau) in patients with bruxism Group 2: monolithic zirconia molar crowns (Prettau) in patients without bruxism Group 3: monolithic lithium disilicate molar crowns (IPSe.max) in patients with bruxism Group 4: monolithic lithium disilicate molar crowns (IPSe.max) in patients without bruxism
Outcomes	Success of all ceramic crowns as determined by complication rate (time frame up to 5 years)
Starting date	February 2015
Contact information	Brigitte_Ohlmann@40med.uni‐heidelberg.de
Notes

CAD/CAM = computer‐aided design and computer‐aided manufacturing; FDPs = fixed dental prostheses; USPHS = United States Public Health Service; VAS = visual analogue scale.