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- Title
Topographical and crystalline change on surface by sandblasting improve flexural and shear bond strength of niobia-modified yttria-stabilized tetragonal zirconia polycrystal.
- Authors
Ha-Young KIM; Jun-Ho CHO; Hyung-In YOON; Jae-Hyun LEE; Sunyoung CHOI; Jung-Suk HAN; In-Sung Luke YEO
- Abstract
This study aimed to investigate the effects of sandblasting on the physical properties and bond strength of two types of translucent zirconia: niobium-oxide-containing yttria-stabilized tetragonal zirconia polycrystals ((Y, Nb)-TZP) and 5 mol% yttria-partially stabilized zirconia (5Y-PSZ). Fully sintered disc specimens were either sandblasted with 125 µm alumina particles or left as-sintered. Surface roughness, crystal phase compositions, and surface morphology were explored. Biaxial flexural strength (n=10) and shear bond strength (SBS) (n=12) were evaluated, including thermocycling conditions. Results indicated a decrease in flexural strength of 5Y-PSZ from 601 to 303 MPa upon sandblasting, while (Y, Nb)-TZP improved from 458 to 544 MPa. Both materials significantly increased SBS after sandblasting (p<0.001). After thermocycling, (Y, Nb)-TZP maintained superior SBS (14.3 MPa) compared to 5Y-PSZ (11.3 MPa) (p<0.001). The study concludes that (Y, Nb)-TZP is preferable for sandblasting applications, particularly for achieving durable bonding without compromising flexural strength.
- Subjects
SAND blasting; SHEAR strength; BOND strengths; ZIRCONIUM oxide; FLEXURAL strength
- Publication
Dental Materials Journal, 2024, Vol 43, Issue 2, p216
- ISSN
0287-4547
- Publication type
Article
- DOI
10.4012/dmj.2023-225