Relyxtm u200

Adhesive resin cement (Panavia F2.0; Kuraray Medical Inc., Osaka, Japan) containing methacryloyloxydecyl dihydrogen phosphate (MDP), and self-adhesive resin cement (RelyX^TM U200; 3M ESPE, St Paul, MN, USA) containing a self-etching primer were used. The composition of each is summarized in Table 2.

The metal abutments and the inside of the prepared crown were treated with 32% phosphoric acid gel (ScotchbondTM Universal Etchant, 3M/ESPE, Neuss, Germany) for 30 min and then cleansed with water before being dried. Following this, 10-methacryloyloxydecyl dihydrogen phosphate (MDP)-containing primer (Z-PRIMETM plus, BISCO, Schaumburg, IL, USA) was coated and lightly dried with a drier. We took and evenly mixed a suitable amount of double-polymerized resin cement (Rely-XTM U200, 3M/ESPE, Neuss, Germany), a base agent, and accelerator, which we then filled inside the crown. After this, we applied a compressive force of 49 N using a static-load device to cement the crown to the metal abutment. It was then stored in distilled water at 37 °C for 24 h for an aging treatment.