Purpose: This study evaluated the clinical performance of a self-adhesive hybrid resin cement Ivoclar cement (Ivoclar-Vivadent) for use on all ceramic crowns over a one year period. Methods: Forty-two all ceramic crown restorations were placed in 34 subjects. Following conventional all-ceramic tooth preparations, Zirconia ceramic crowns were seated and cemented with a self-adhesive hybrid cement following manufacturer's instructions. Forty crowns were evaluated at one year using the following criteria: Anatomic Form (AF), Color Match (CM), Marginal Integrity (MI), Marginal Discoloration (MD), Surface Staining (SS), Retention/Fracture (RF), Recurrent Caries (RC), Polish-ability (PO) and Sensitivity (SE). The following results (in # of crowns) were found using a modified USPHS grading system (BL=Baseline, 6M=6 Months, and 1Y=One Year):
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| AF | CM | MI | MD | SS | PO | ||||||||||||
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| BL | 6M | 1Y | BL | 6M | 1Y | BL | 6M | 1Y | BL | 6M | 1Y | BL | 6M | 1Y | BL | 6M | 1Y |
| Alpha | 40 | 39 | 39 | 28 | 37 | 39 | 40 | 40 | 40 | 39 | 38 | 37 | 40 | 39 | 40 | 39 | 38 | 40 |
| Bravo | 0 | 0 | 0 | 12 | 3 | 1 | 0 | 0 | 0 | 1 | 2 | 3 | 0 | 1 | 0 | 1 | 2 | 0 |
| Charlie | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Delta | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Results: 1.) MI, SS, and SC remained unchanged after one year. 2.) One restoration debonded after one week but re-cemented with no further problems. 3.) One restoration had a small fracture at the interproximal contact. 4.) Three restorations had slight stain surrounding the tooth. 5.) Color match seemed to improve over time. 6.) No sensitivity was reported. Conclusion: This study indicates that this Self-Adhesive composite resin cement is acceptable for routine clinical use on all-ceramic crowns. Study supported by Ivoclar-Vivadent, Inc.