Effect of cementation techniques on fracture load of monolithic zirconia crowns.

Biomaterial investigations in dentistry Pub Date : 2021-10-20 eCollection Date: 2021-01-01 DOI:10.1080/26415275.2021.1990764
Janne Angen Indergård, Anneli Skjold, Christian Schriwer, Marit Øilo
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引用次数: 5

Abstract

Aim: The aim of this study was to evaluate the effect of cement on the fracture load of monolithic zirconia crowns with different yttria content (3 and 5 mol%).

Methods: A total of 62 monolithic zirconia crowns, 40 3Y-zirconia crowns (Prettau® Zirconia, Zirkonzahn) and 22 5Y-zirconia crowns (Prettau® 4 Anterior®, Zirkonzahn) were produced to a shallow chamfer molar preparation. The 3Y-crowns were divided into four groups and attached to composite abutment duplicates (SDR® flow+, Dentsply DeTrey GmbH) using the following four cementation techniques; (1) Self-adhesive resin-based cement, (2) Pre-treatment with air-abrasion and self-adhesive resin-based cement, (3) Zinc phosphate cement, (4) Glass-ionomer cement. The 5Y-crowns were divided into two groups and attached to the duplicates with; (1) Self-adhesive resin-based cement, or (2) Air-abrasion pre-treatment and self-adhesive resin-based cement. All crowns were loaded axially (0.5 mm/min) on the occlusal surface until fracture occurred.

Results: Among the 3Y-zirconia groups, the zinc phosphate cement group fractured at lower loads compared to the resin-based cement groups, with and without air-abrasion, (p < .012). Among the 5Y-groups the air-abraded crowns fractured at statistically significant lower loads compared to the untreated crowns (p < .028). Load at fracture values were significantly different between the two zirconia materials (p < .001), with fracture loads ranging from 3873 to 7500 N in the 3Y-groups, and 2100 to 4948 N in the 5Y-groups.

Conclusions: Resin-based cementation increased the fracture load compared to non-adhesive cementation. The 3Y-crowns fractured at almost twice the loads of the 5Y-crowns. Pre-treatment with air abrasion reduced the strength of the 5Y-crowns only, showing the importance of differentiating the treatment of the two materials.

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胶结技术对整体氧化锆冠断裂载荷的影响。
目的:研究不同氧化钇含量(3 mol%和5 mol%)下水泥对整体氧化锆冠断裂载荷的影响。方法:共制作62个单片氧化锆冠、40个3y -氧化锆冠(Prettau®zirconia, Zirkonzahn)和22个5y -氧化锆冠(Prettau®4 Anterior®,Zirkonzahn)用于浅倒角磨牙制备。3y -冠分为四组,并使用以下四种胶结技术连接到复合基台复制体(SDR®flow+, Dentsply DeTrey GmbH);(1)自粘树脂基水泥,(2)气磨自粘树脂基水泥预处理,(3)磷酸锌水泥,(4)玻璃离子水泥。将5y -冠分成两组,分别与;(1)自粘树脂基水泥,或(2)气磨预处理和自粘树脂基水泥。所有冠均轴向(0.5 mm/min)加载于咬合面,直至发生骨折。结果:在3Y-zirconia组中,有和没有空气磨损的情况下,磷酸锌骨水泥组比树脂基骨水泥组骨折负荷更低(p p p)。结论:树脂基骨水泥组比无粘合剂骨水泥组骨折负荷增加。3y -冠的断裂载荷几乎是5y -冠的两倍。空气磨损预处理只会降低5y -冠的强度,这表明区分两种材料处理的重要性。
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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