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Zirconia Seating and Cementation Recommendations:
Our restorations are fabricated from a solid zirconia oxide material. Zirconia oxide exhibits a strong affinity for phosphate groups. You can take advantage of this fact with phosphate containing primers, such as Monobond Plus (Ivoclar Vivadent) and Z-Prime Plus (Bisco) or cements such as Ceramir Crown & Bridge (Doxa Dental), to increase your bond strengths to zirconia oxide. Unfortunately, saliva also contains phosphates in the form of phospholipids, so when a zirconia crown or bridge is tried in the patient’s mouth and comes in contact with saliva, the phosphate groups in the saliva bind to the zirconia oxide and cannot be rinsed out with water. Attempting to use phosphoric acid (which is full of phosphate groups) to “clean out” the saliva only makes the problem worse.
The only way found to successfully remove these phosphate groups from the interior of a zirconia restoration is with the use of Ivoclean (Ivoclar Vivadent). This zirconia oxide solution is placed inside the restoration for 20 seconds and then rinsed out. Due to the large concentration of free zirconia oxide in the Ivoclean, it acts as a sponge and binds to the phosphate groups that were previously bonded to the zirconia restoration. Once the Ivoclean is rinsed out, you will have a fresh bonding surface for the Monobond Plus, Z-Prime Plus or Ceramir to bond to.
Cementation Recommendations
SpeedCEM Plus (Ivoclar) – a self-adhesive, self-curing resin cement with optional light-curing. This comes in three shades: transparent, opaque and yellow. However, if you find something comparable to this product, with more shade options, this will increase the aesthetics of the more translucent zirconias.
If you have additional questions, please click on the link below for more information.
Dickerson Dental Studio, Inc. * 9305 Hermitage Road * Chardon, Ohio 44024 * 440.944.8430