Bond strength between a veneering composite resin and zirconia frameworks with attached mechanical retentive devices.

Keisuke Matsushima, Kei Kubochi, Futoshi Komine, Fumiaki Kimura, Tatsuro Kobayashi, Hideo Matsumura

Dental materials journal 2022 Feb 01

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The effects of mechanical retentive devices and various surface treatments on the shear bond strength between a veneering composite resin and zirconia was investigated. Zirconia disks were classified into three surface-treatment groups: airborne-particle abrasion, overglazing, and overglazing with white alumina particles of three different grain sizes (50, 70, and 105 μm) attached onto zirconia disks (ZR-50, ZR-70, and ZR-105, respectively). They were further divided into four groups (n=44): unprimed, Clearfil Porcelain Bond Activator (CA), Clearfil Photo Bond (CB), and CA+CB. An indirect composite resin was bonded to zirconia specimens. Shear bond strengths were measured. For the ZR-70 and ZR-105 groups, the CB and CA+CB specimens exhibited higher bond strengths than the other two specimens after thermocycling. The ZR-70 and ZR-105 groups achieved micromechanical interlocking, and priming with a phosphate monomer (MDP) yielded stable bond strengths between the composite resin and zirconia with alumina particles attached as retentive devices.

Citation

Keisuke Matsushima, Kei Kubochi, Futoshi Komine, Fumiaki Kimura, Tatsuro Kobayashi, Hideo Matsumura. Bond strength between a veneering composite resin and zirconia frameworks with attached mechanical retentive devices. Dental materials journal. 2022 Feb 01;41(1):117-125