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.
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.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
60
CAD/CAM fabricated zirconia bridge framework is veneered with CAD/CAM fabricated lithium disilicate ceramic veneer
Universität Zürich, Zentrum für Zahn-, Mund- und Kieferheilkunde
Zurich, Switzerland
Number of participants with clinical success
Clinical success is defined as more than 95% survival of the restoration after 2 years.
Time frame: 2 years
Restoration quality
Characterisation of the restorations according to United States Public Health Services (USPHS) criteria
Time frame: 1 week, 1 year, 2 years, 3 years, 4 years, 5 years
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