クラウンブリッジ

[EP-10] PEEKブロックへの接着前処理がレジンセメントのせん断接着強さに及ぼす影響

*新谷 明一^1,2、三浦 大輔¹、石田 祥己¹、中島 賢太郎¹、渡邊 慧¹ (1. 日本歯科大学生命歯歯学部、2. トゥルク大学)

[Abstract]
[Objective]
This laboratory study aimed to investigate the influence of different surface pre-treatments on shear bond strength of 4-META/MMA-TBB resin luting agent to Polyetheretherketone (PEEK) block.
[Method]
50 PEEK (Shofu block PEEK, Shofu, Kyoto, Japan) adherents abraded with 50 μm Al₂O₃ (Cobra, Renfert, Hilzingen, Germany), were randomly divided, according to surface pre-treatments, into five groups (n=10), TBB: Butoxybutylborane (catalyst V, Sun Medical, Shiga, Japan) treatment, MMA: 4-META/MMA (monomer liquid, Sun Medical) treatment, MIX: 4-META/MMA-TBB (monomer liquid, and catalyst V, Sun Medical)treatment, and PZ: porcelain-zirconia primer (PZ primer, Sun Medical) treatment, while CON: no surface pre-treatments served as control group. Super-Bond (Sun Medical) was used as resin luting agent. Shear bond strength (SBS) was measured, and fractured surfaces were observed.
[Results and Discussion]
The highest SBS was recorded in MIX group (22.48 ± 4.05 MPa), followed by PZ group (23.55 ± 3.64 MPa), with a statistical significance, while TBB and MMA group exhibited the lowest mean SBS value (13.89± 1.69 MPa in TBB and 13.29 ± 3.01 MPa in MMA).