3Y-TZP 晶界在上釉和分层中的作用。

IF 4.6 1区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Dental Materials Pub Date : 2024-10-28 DOI:10.1016/j.dental.2024.10.005

R Shahmiri, O C Standard, J N Hart, N Gharagozlu, G Bahmanrokh, Y Yin, S S Mofarah, E Adabifiroozjaei, R Webster, C C Sorrell

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引用次数: 0

摘要

目的：单片 3 摩尔%钇稳定四方氧化锆多晶体或 3Y-TZP 具有转化增韧现象，适用于牙科修复，可将断裂风险降至最低，并减少天然牙齿的缩减。然而，要达到与天然牙的光学特性相匹配的效果，需要进行染色/上釉或分层。研究假设是染色/上釉或分层后 3Y-TZP 晶界的物理、化学和结构方面：结果：氧化锆修复体制造过程中的初始烧结步骤对后续上釉和分层阶段的结果起着至关重要的作用：本研究首次揭示了真空退火的优势，即存在铁弹性域切换增韧机制。

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Role of 3Y-TZP grain boundaries in glazing and layering.

Objectives: Monolithic 3 mol% Yttria-stabilized tetragonal zirconia polycrystal or 3Y-TZP exhibits transformation toughening phenomena which is suitable for dental restorations with minimizing the risk of fracture and to decrease reduction of natural tooth. However, the staining/glazing or layering is required to achieve of a match with the optical properties of natural dentition. The hypothesis under examination is that the physical, chemical, and structural aspects of the 3Y-TZP grain boundaries after the staining/glazing or layering.

Methods: The three sintering temperatures of 1400 °C, 1500 °C, and 1600 °C were considered followed by vacuum annealed at 750 °C for 1 min; and air post-annealed at 750 °C for 1 min RESULTS: The initial sintering step in the fabrication of zirconia restorations plays a critical role in the outcomes of the subsequent stages of glazing and layering.

Significance: The current study revealed for first time the advantage of vacuum annealing by the presence of ferroelastic domain switching toughening mechanism.

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来源期刊

Dental Materials 工程技术-材料科学：生物材料

CiteScore

9.80

自引率

10.00%

发文量

290

审稿时长

67 days

期刊介绍： Dental Materials publishes original research, review articles, and short communications. Academy of Dental Materials members click here to register for free access to Dental Materials online. The principal aim of Dental Materials is to promote rapid communication of scientific information between academia, industry, and the dental practitioner. Original Manuscripts on clinical and laboratory research of basic and applied character which focus on the properties or performance of dental materials or the reaction of host tissues to materials are given priority publication. Other acceptable topics include application technology in clinical dentistry and dental laboratory technology. Comprehensive reviews and editorial commentaries on pertinent subjects will be considered.