Failure resistance of single-implant crowns assembled from polyetheretherketone and lithium disilicate abutments and different crown materials after artificial aging.

IF 1.8 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Computerized Dentistry Pub Date : 2024-10-15 DOI:10.3290/j.ijcd.b4200857

Adham Elsayed, Gasser Farrag, Mohamed Sad Chaar, Christine Yazigi, Nouran Abdelnabi, Matthias Kern

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引用次数: 0

Abstract

Aim: The objective of the present study was to investigate the effect of using different materials for the fabrication of implant abutments and crowns on the mechanical behavior of implant-supported single crowns after artificial aging. The materials were tested in different combinations to reveal whether using stiff or resilient materials as an abutment or a crown material might influence the fracture strength of the whole structure.

Materials and methods: A total of 40 implants (blueSKY) were restored with identical custom-made CAD/CAM abutments milled out of lithium disilicate or ceramic-reinforced polyetheretherketone (PEEK) and divided into five test groups (n = 8). Forty crowns made of three different materials (zirconia, lithium disilicate, and ceramic-reinforced PEEK) were used to restore the abutments. Specimens were subjected to mechanical loading up to 1,200,000 cycles in a chewing simulator (Kausimulator) with additional thermal cycling. The surviving specimens were subjected to quasi-static loading using a universal testing machine (Z010).

Results: The PEEK abutments with zirconia crowns showed the highest median failure load (3890.5 N) while the PEEK abutments with lithium disilicate crowns exhibited the lowest (1920 N). Fracture and deformation occurred in both the crowns and abutments.

Conclusion: The failure load of the restorations was influenced by the material of the abutment and crown. Restoring PEEK abutments with zirconia crowns showed a high failure load and no screw loosening.

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聚醚醚酮和二硅酸锂基台与不同冠材料组装的单种植体冠人工老化后的抗失效性。

目的：研究使用不同材料制作种植体基台和牙冠对人工老化后种植体支持的单冠机械行为的影响。对不同组合的材料进行测试，以揭示使用刚性或弹性材料作为基台或冠材料是否会影响整个结构的断裂强度：共有40颗种植体（blueSKY，bredent GmbH & Co. KG）使用相同的定制CAD/CAM基台进行修复，基台由二硅酸锂或陶瓷增强PEEK制成，并分为5个测试组（每组8颗）。基台修复使用了 40 个由三种不同材料（氧化锆、二硅酸锂和陶瓷增强 PEEK）制成的牙冠。试样在咀嚼模拟器（Kausimulator，Willytech 公司）中经受了高达 120 万次的机械载荷循环和额外的热循环。使用万能试验机（Z010，Zwick）对存活的试样进行准静态加载：结果：带有氧化锆冠的 PEEK 基台显示出最高的中值破坏负荷（3890.5 N），而带有二硅酸锂冠的 PEEK 基台显示出最低的破坏负荷（1920 N）。冠和基台都发生了断裂和变形：结论：修复体的破坏负荷受基台和牙冠材料的影响。用氧化锆冠修复 PEEK 基台显示出较高的失效载荷，且无螺钉松动。

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

International Journal of Computerized Dentistry Dentistry-Dentistry (miscellaneous)

CiteScore

2.90

自引率

0.00%

发文量

期刊介绍： This journal explores the myriad innovations in the emerging field of computerized dentistry and how to integrate them into clinical practice. The bulk of the journal is devoted to the science of computer-assisted dentistry, with research articles and clinical reports on all aspects of computer-based diagnostic and therapeutic applications, with special emphasis placed on CAD/CAM and image-processing systems. Articles also address the use of computer-based communication to support patient care, assess the quality of care, and enhance clinical decision making. The journal is presented in a bilingual format, with each issue offering three types of articles: science-based, application-based, and national society reports.