PMID- 28849798 OWN - Quintessenz Verlags-GmbH CI - Copyright Quintessenz Verlags-GmbH OCI - Copyright Quintessenz Verlags-GmbH TA - J Adhes Dent JT - The Journal of Adhesive Dentistry IS - 1757-9988 (Electronic) IP - 4 VI - 19 PST - ppublish DP - 2017 PG - 323-329 LA - en TI - Efficacy of Different Surface Treatments for Intraoral Repair of Veneered Zirconia Frameworks LID - 10.3290/j.jad.a38891 [doi] FAU - Libecki, Wojtek AU - Libecki W FAU - Elsayed, Adham AU - Elsayed A FAU - Lehmann, Frank AU - Lehmann F FAU - Kern, Matthias AU - Kern M CN - OT - intraoral ceramic repair OT - zirconia repair OT - silicon carbide grinding bur OT - tensile bond strength OT - primer OT - zirconia framework OT - all-ceramic restorations AB - Purpose: To evaluate the efficacy of different surface treatments on the repair of veneered zirconia ceramics. Materials and Methods: Forty-eight zirconia disks were divided into three groups according to the method of surface treatment: polished surface, air abraded, or ground using a special silicon carbide bur (SiC Grinding Bur). All specimens were primed using a primer containing MDP (Cimara Zircon, Voco) and then bonded to composite in Plexiglas tubes using dual-curing adhesive resin (Bifix QM, Voco). Each of the three groups was further divided into two subgroups (n = 8) stored either in water at 37°C for 3 days without thermocycling or stored in water at 37°C for 150 days with an additional 37,500 thermocycles between 5°C and 55°C. After storage, tensile bond strength (TBS) was measured in a universal testing machine. Results: After 3 days of storage, silicon carbide bur and air-abraded groups showed high TBS that ranged from 32.7 to 41.0 MPa (p ≤ 0.05). After 150 days of storage with thermocycling, the air-abraded group showed the most durable TBS (34.8 MPa), while the silicon carbide bur group showed a significant reduction in TBS (21.2 MPa); in the polished control group, specimens all debonded spontaneously during storage (p ≤ 0.05). Conclusion: Repair of zirconia ceramic after chipping of its veneers showed durable TBS when surface conditioning with air abrasion or roughening of the zirconia surface with a silicon carbide bur was provided. AID - 843365