Comparing four different methods of measuring fracture toughness and its relationship with fractal dimension in a polycrystalline (3Y-TZP) dental ceramic.

• Tác giả: Yuanyuan Duan, Jason A Griggs, Kartikeya S Jodha, Seth T Lirette, John J Mecholsky, Susana M Salazar Marocho
• Ngôn ngữ: eng
• Thông tin xuất bản: England : Dental materials : official publication of the Academy of Dental Materials , 2025
• Bộ sưu tập: NCBI
• ID: 737478

Tóm tắt

OBJECTIVES: Previous studies reported various methods of measuring fracture toughness of dental ceramics. The objectives of this study were to compare different methods and to validate fractal analysis to estimate fracture toughness for a polycrystalline dental ceramic. METHODS: Bar-shaped specimens were prepared from 3 mol% yttria-stabilized tetragonal polycrystalline (3Y-TZP) ceramic. Each specimen was prepared with a series of indentations using a Vickers diamond at 150 N followed by loading in 4-point flexure until failure. Fracture toughness (K RESULTS: Mean fracture toughness by MI, QF, and SCF-RS techniques were 4.56 ± 0.44 MPa·m SIGNIFICANCE: The fracture toughness of 3Y-TZP ceramic was calculated using different methods. Fractal dimension can be used to estimate the baseline fracture toughness for this material and can be paired with other methods to estimate the amount of transformation toughening.