الفهرس 
AbstractOnly 14 pages are availabe for public view
 |  | from | 116 |  |  |
| | | from | 116 | | |
Abstract
Objectives: The aim of this in-vitro study was to evaluate the effect of different surface treatment and resin cements on the retention of monolithic zirconia crowns. Materials and Methods: A total of 40 maxillary premolars extracted for orthodontic cause from the outpatient dental clinic, Faculty of Dentistry, Mansoura University, Egypt, were used in this study. Teeth were randomly divided into 4 groups according to the surface treatment and cement used (n=10) into: group AHP :( Airborne particles abrasion and hot acids + Panavia SA cement plus), group AHL :( Airborne particles abrasion and hot acid + G-CEM Link Force Cement), group AP: (Airborne particles abrasion + Panavia SA cement) and group AL: (Airborne particles abrasion+ G-CEM Link Force cement). The preparations were performed using computer aided design/computer aided manufacturing (CAD/CAM) technology to standardize the preparation, the prepared teeth scanned by optical scanner, CubeX2 zirconia crowns (Dental Direkt GbmH, Spenge,Germany) were fabricated for each preparation. Crowns cemented to preparations after surface treatment of its internal surfaces. And after 10,000 thermalcycles, retention test was performed using a universal testing machine (0.5 mm/min). Results : There was significance difference between two surface treatments and cements. Application of hot acids after airborne particles abrasion and using of MDP self-adhesive resin cement improved retention significantly. Conclusion: Retention of zirconia crowns improved by using hot acids after airborne particles abrasion.