Fracture resistance of ultratranslucent multilayered zirconia veneers with different facial thicknesses.

IF 2 3区工程技术 Q2 ANATOMY & MORPHOLOGY

Microscopy Research and Technique Pub Date : 2024-07-14 DOI:10.1002/jemt.24649

Carlos A Jurado, Akimasa Tsujimoto, Silvia Rojas-Rueda, Salwa Mekled, Razan Alaqeely, Hussain D Alsayed, Abdulaziz Alhotan

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引用次数: 0

Abstract

To assess the fracture resistance of computer-aided design and computer-aided manufacturing (CAD/CAM) ultratranslucent multilayered zirconia (5Y-YZP) veneers with varying facial thickness. Sixty translucent zirconia veneers were designed and milled using a chairside CAD/CAM system for maxillary central incisors. The butt joint incisal veneer tooth preparations consisted of 1.00 mm incisal reduction, 0.40 mm chamfer margin, and three different facial reductions; 0.50, 0.75, and 1 mm, respectively. The ceramic veneers were cemented to printed resin dies and subjected to thermal cycling. Subsequently, the restorations were loaded with compressive loading force, and fracture occurrences were recorded. Scanning electron microscope (SEM) images of the fractured specimens were captured. The fracture resistance varied among the veneers with different facial thicknesses. Ultratranslucent zirconia veneers with a facial thickness of 1.00 mm exhibited the highest fracture resistance values (742.15 N), followed by those with 0.75 mm facial thickness (673 N). Minimally invasive veneers with 0.50 mm thickness displayed similar fracture resistance as thicker veneers with 0.75 mm. However, veneers with 1.00 mm thickness displayed the highest values. SEM fracture patterns for 0.50 and 0.75 mm display similar and fewer crack lines than 1.00 mm veneers. RESEARCH HIGHLIGHTS: Minimally invasive zirconia veneers exhibit similar fracture resistance to thicker veneers.

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不同表面厚度的超半透明多层氧化锆贴面的抗断裂性。

评估计算机辅助设计和计算机辅助制造（CAD/CAM）超半透明多层氧化锆（5Y-YZP）贴面的抗断裂性，贴面厚度各不相同。使用椅旁 CAD/CAM 系统为上颌中切牙设计并铣制了 60 个半透明氧化锆贴面。对接切牙贴面的牙体预备包括 1.00 毫米的切缘减薄、0.40 毫米的倒角边缘和三种不同的面部减薄，分别为 0.50 毫米、0.75 毫米和 1 毫米。将陶瓷贴面粘结到印制的树脂模具上，并进行热循环。随后，对修复体施加压缩加载力，并记录断裂发生情况。断裂试样的扫描电子显微镜（SEM）图像被拍摄下来。不同表面厚度的贴面的抗断裂性各不相同。表面厚度为 1.00 毫米的超半透明氧化锆贴面的抗断裂强度值最高（742.15 牛顿），其次是表面厚度为 0.75 毫米的贴面（673 牛顿）。厚度为 0.50 毫米的微创贴面与厚度为 0.75 毫米的贴面显示出相似的抗断裂强度。然而，厚度为 1.00 毫米的贴面显示出最高值。与 1.00 毫米的贴面相比，0.50 毫米和 0.75 毫米的贴面在 SEM 上的断裂图显示出相似且较少的裂纹。研究亮点：微创氧化锆贴面的抗断裂性与较厚的贴面相似。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Microscopy Research and Technique 医学-解剖学与形态学

CiteScore

5.30

自引率

20.00%

发文量

233

审稿时长

4.7 months

期刊介绍： Microscopy Research and Technique (MRT) publishes articles on all aspects of advanced microscopy original architecture and methodologies with applications in the biological, clinical, chemical, and materials sciences. Original basic and applied research as well as technical papers dealing with the various subsets of microscopy are encouraged. MRT is the right form for those developing new microscopy methods or using the microscope to answer key questions in basic and applied research.