Sultan Sherif El Sayed, Almuhyi Nawaf Hussain Saif, Alzabni Khalid Maziad, Alruwaili Rayan Hamad Qubayl
Department of Prosthetic Dental Sciences, College of Dentistry, Jouf University, Sakakah, Saudi Arabia.
Department of Fixed Prosthodontics, College of Dentistry, Tanta University, Tanta, Egypt.
J Pharm Bioallied Sci. 2024 Jul;16(Suppl 3):S2476-S2478. doi: 10.4103/jpbs.jpbs_331_24. Epub 2024 Jun 8.
Fixed dental prostheses (FDPs) are commonly used in prosthodontics to restore missing teeth and improve oral function and esthetics. The selection of prosthodontic materials significantly impacts the fracture resistance of FDPs, thus influencing their clinical success. This study aimed to assess the fracture resistance of different prosthodontic materials commonly used in FDPs through testing.
Thirty standardized FDP specimens were fabricated using three different materials: Monolithic zirconia, heat press lithium disilicate, and metal ceramic. Each group consisted of ten specimens. The specimens were subjected to standardized loading using a universal testing machine until fracture occurred. Fracture resistance values were recorded in Newtons (N) and statistically analyzed using one-way analysis of variance (ANOVA) followed by post-hoc Tukey tests.
The mean fracture resistance values for the three materials were as follows: zirconia, 1450 N; lithium disilicate, 1200 N; and metal ceramic, 950 N. Statistical analysis revealed a significant difference among the groups ( < 0.05). Tukey tests indicated that zirconia exhibited significantly higher fracture resistance compared to lithium disilicate and metal ceramic ( < 0.05). However, there was no significant difference in fracture resistance between lithium disilicate and metal-ceramic groups ( > 0.05).
Within the limitations of this study, zirconia demonstrated the highest fracture resistance among the tested materials for FDPs, followed by lithium disilicate and metal ceramic. The findings highlight the importance of material selection in achieving optimal clinical outcomes and longevity of fixed dental prostheses.
固定义齿（FDPs）常用于口腔修复学中，以修复缺失牙齿并改善口腔功能和美观。口腔修复材料的选择对固定义齿的抗折性有显著影响，从而影响其临床成功率。本研究旨在通过测试评估固定义齿中常用的不同口腔修复材料的抗折性。
使用三种不同材料制作30个标准化的固定义齿样本：整体式氧化锆、热压铸二硅酸锂和金属陶瓷。每组包含10个样本。使用万能试验机对样本进行标准化加载，直至发生断裂。抗折性值以牛顿（N）记录，并使用单因素方差分析（ANOVA）进行统计分析，随后进行事后Tukey检验。
三种材料的平均抗折性值如下：氧化锆，1450 N；二硅酸锂：1200 N；金属陶瓷，950 N。统计分析显示各组之间存在显著差异（<0.05）。Tukey检验表明，与二硅酸锂和金属陶瓷相比，氧化锆表现出显著更高的抗折性（<0.05）。然而，二硅酸锂组和金属陶瓷组之间的抗折性没有显著差异（>0.05）。
在本研究的局限性内，氧化锆在测试的固定义齿材料中表现出最高的抗折性，其次是二硅酸锂和金属陶瓷。研究结果突出了材料选择对于实现固定义齿最佳临床效果和使用寿命的重要性。
