Hybrid-abutment-restoration: effect of material ... | 合法醫療器材資訊網

由WAl-Zordk著作·2020—Basedonfractureload,zirconiahybrid-abutment-crowncanbeused,whilelithiumdisilicateandPEEKhybrid-abutment-crownsmaycautiously ...

To evaluate the tightening torque maintenance with zirconia, lithium disilicate, and polyetheretherketone (PEEK) hybrid-abutment-crowns after thermal aging, in addition to assess the fracture resistance of hybrid-abutment-crowns fabricated with different materials.

Thirty implants were restored with identical hybrid-abutment-crowns, resembling the maxillary first premolar, fabricated from zirconia (Zr), lithium disilicate (L2), or ceramic-reinforced PEEK (PE). The three groups (n = 10) were constructed utilizing a Ti-base. After bonding, each restoration was secured in its respective implant with a torque of 25 Ncm. All restorations were subjected to thermal aging for 7000 cycles. The loosening torque was assessed utilizing the digital torque meter. Each restoration was subjected to fracture testing and the mode of failure was determined.

Zr group displayed the highest mean torque loss value (2....