Fracture Resistance and Failure Modes of Ultrathin Occlusal Veneers Made of Different Ceramic Materials: An In Vitro Study.

Q4 Dentistry

Journal of Dental Research, Dental Clinics, Dental Prospects Pub Date : 2026-06-30 eCollection Date: 2026-06-01 DOI:10.34172/joddd.44718

Mohamed Ezzat Elbanna, Hesham Ibrahim Othman, Ahmed Mohammed Leithy Alameldin

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Abstract

Introduction: The current in vitro study was designed to assess the failure mode and fracture resistance of ultrathin occlusal veneers made from different ceramic materials.

Methods: Twenty-four ultrathin occlusal veneers were fabricated on maxillary extracted first premolar teeth. Three ceramic materials were used: lithium disilicate (LDS), zirconia-reinforced lithium disilicate (ZLS), and zirconium dioxide (ZIR). An adhesive luting agent was used to adhesively bond occlusal veneers. Each sample was subjected to thermocycling, ranging from 5 to 55°C. Fracture resistance was tested using a universal testing machine, and fractured surfaces were examined with a stereomicroscope and a scanning electron microscope (SEM) to assess failure modes.

Results: A statistically significant difference was observed; the highest mean fracture resistance was observed in LDS (1741±308.3 N), followed by ZLS (1192±89.44 N), and then ZIR (866.9±60.23 N), which had the lowest mean fracture resistance. The failure mode of the ZIR group differed significantly from those of the other groups.

Conclusion: All the tested ceramic materials used as ultrathin occlusal veneers exhibited fracture loads significantly higher than the average physiological masticatory forces. Compared with the other two groups, LDS had the highest fracture resistance value. ZIR occlusal veneers exhibited more repairable fractures than LDS and ZLS.

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不同陶瓷材料制作的超薄咬合贴面的抗断裂性能和破坏模式：体外研究。

摘要：本研究旨在评估不同陶瓷材料制作的超薄咬合贴面的破坏模式和抗断裂能力。方法：在上颌拔除的第一前磨牙上制备24颗超薄牙合贴面。采用三种陶瓷材料：二硅酸锂（LDS）、氧化锆增强二硅酸锂（ZLS）和二氧化锆（ZIR）。采用粘接剂对牙合贴面进行粘接。每个样品进行热循环，温度范围从5到55°C。使用万能试验机测试断裂抗力，并使用体视显微镜和扫描电子显微镜（SEM）检查断裂表面以评估破坏模式。结果：差异有统计学意义；LDS的平均断裂阻力最高（1741±308.3 N），其次是ZLS(1192±89.44 N)， ZIR(866.9±60.23 N)，平均断裂阻力最低。ZIR组的失效模式与其他组有显著差异。结论：所测试的超薄牙合贴面陶瓷材料均表现出明显高于平均生理咀嚼力的断裂载荷。与其他两组相比，LDS具有最高的断裂抗力值。ZIR牙合贴面比LDS和ZLS有更多的可修复骨折。

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

Journal of Dental Research, Dental Clinics, Dental Prospects Dentistry-General Dentistry

CiteScore

1.40

自引率

0.00%

发文量

审稿时长

25 weeks

期刊介绍： Journal of Dental Research Dental Clinics Dental Prospects (JODDD) is a Platinum* Open Access, peer-reviewed quarterly indexed journal that publishes articles of basic, clinical, and prospective nature in all areas of dentistry and oral health.