This trial is active, not recruiting.

Condition three-unit posterior bridges
Treatments cad/cam veneering, manually layered veneering
Sponsor Ivoclar Vivadent AG
Start date January 2010
End date December 2017
Trial size 60 participants
Trial identifier NCT02175329, CAD-On


60 bridge frameworks are CAD/CAM manufactured from zirconia-ceramic; 30 bridges are veneered with CAD/CAM fabricated lithium disilicate ceramic, 30 bridges are manually layered. The goal is to compare clinical survival , biological or technical behaviour of the restorations.

United States No locations recruiting
Other countries No locations recruiting

Study Design

Allocation randomized
Intervention model parallel assignment
Primary purpose treatment
Masking no masking
CAD/CAM manufactured e.max CAD veneers on zirconia framework
cad/cam veneering
CAD/CAM fabricated zirconia bridge framework is veneered with CAD/CAM fabricated lithium disilicate ceramic veneer
(Active Comparator)
Manually layered veneering on CAD/CAM fabricated zirconia bridge framework
manually layered veneering

Primary Outcomes

Number of participants with clinical success
time frame: 2 years

Secondary Outcomes

Restoration quality
time frame: 1 week, 1 year, 2 years, 3 years, 4 years, 5 years

Eligibility Criteria

All participants from 18 years up to 70 years old.

Inclusion Criteria: - single missing posterior tooth with two adjacent posterior teeth - no acute conservative or paradontal treatment need except for the teeth to be treated in the study - sufficient oral hygiene Exclusion Criteria: - known allergies to components - bruxism - missing antagonist tooth - pregnancy or lactation - missing written consent - patients which are not expected to be compliant - severe systemic diseases - untreated carious lesions - untreated parodontitis

Additional Information

Official title A Randomized Clinical Trial of 3-unit Posterior Zirconia-ceramic Fixed Dental Prosthesis (FDPs) Veneered With Layered and Milled (CAD-on) Veneering Ceramics
Principal investigator Andreas Bindl, Dr.med.dent.
Description Randomized prospective controlled clinical study with three-unit posterior bridges made of zirconia-ceramic to compare veneering with manually layering or CAD/CAM fabricated lithium disilicate ceramic veneers. The hypothesis is that there is no difference in clinical survival of the restorations and no difference in biological or technical behaviour.
Trial information was received from ClinicalTrials.gov and was last updated in March 2017.
Information provided to ClinicalTrials.gov by Ivoclar Vivadent AG.