IADR Abstract Archives

Clinical trial on single zirconia crown: 1-year preliminary results

Objective: To clinically evaluated how three different coping designs may influence clinical failure due to different fracture resistance of porcelain layered zirconia crowns. 

Method: Informed written consent of patients and Ethical Committee approval were obtained. 90 posterior teeth in need to be restored with porcelain layered zirconia crowns were selected. A standardized abutment preparation was performed with occlusal and axial reduction of 1.5 mm and a chanfer finishing line. After taking impression (EX’cellence, GC) the abutments were  randomly divided in three groups of 30 samples each according with the coping design: Group 1: Flat design (FD); Group 2: Gripings design (GD); Group 3: Porcelain Fused to Metal design(PFMD). The crowns were made on Aadva (GC) and then luted with G-cem (GC). The patients were recalled after 1 year of clinical service.

Result: Group 1 showed 3 failures due to chipping, whilst Groups 2 and 3 did not show failure. No crown was replaced. 

Conclusion: Zirconia coping with flat design (FD) showed chipping already after 1 year of clinical service. The FD should be avoided in daily practice.

Continental European Division Meeting
2013 Continental European Division Meeting (Florence, Italy)
Florence, Italy
2013
225
Scientific Groups
  • Ferrari, Marco  ( University of Siena, Siena, N/A, Italy )
  • Bonadeo, Giovanni  ( Tuscan School of Dental Medicine - University of Firenze and Siena, Siena, N/A, Italy )
    • Oral Session
    Prosthodontics I
    09/06/2013