Effect of Staining, Glazing and Polishing on the Survival Probability of Monolithic Zirconia Crowns.

IF 3.2 3区 医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE
Lívia Fiorin, Stephanie Francoi Poole, Paulo Eduardo Barros Souza Oliveira, Adriana Claudia Lapria Faria, Ricardo Faria Ribeiro, Renata Cristina Silveira Rodrigues
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引用次数: 0

Abstract

Objective: The purpose of this in vitro study was to evaluate the effect of staining, glazing, and polishing on the survival probability of monolithic crowns manufactured with preshaded stabilized zirconia with 5 mol% of yttrium oxide (5Y-TZP).

Materials and methods: Monolithic crowns in the shape of an upper canine (1.5 mm of thickness) were manufactured by CAD/CAM, adhesively cemented on metallic foundation, and divided into 6 groups (n = 21): C (control), S (staining), G (glazing), P (polishing), SG (staining and glazing), and SP (staining and polishing). The survival probability was determined by step-stress accelerated life testing with a load applied to the palatine concavity of the crown. First, the specimens were subjected to a single-load to fracture test (SLF) and next to the fatigue test (5 Hz, thermocycling immersed in water varying 5-55°C), including the light (n = 9), moderate (n = 6), and aggressive (n = 3) loading profiles (load ranged between 20% and 60% of SLF). The survival probability was calculated considering the cycles for failure (CFF) and fatigue failure load (FFL) and illustrated using a Kaplan-Meier graph. The comparison among groups was performed using a Log-Rank test (α = 0.05).

Results: The mean value of SLF was 586.7 N. There was no difference among groups in survival probability, considering CFF and FFL.

Conclusion: Staining, glazing, and polishing can be performed safely without damaging the mechanical behavior of 5Y-TZP monolithic crowns.

Clinical significance: Staining is used to characterize and improve the esthetic of zirconia monolithic crowns. It can be used to reproduce the color gradient in the cervical region of the crown and pigmented grooves. This study showed that staining, glazing, and polishing did not affect the survival probability and the use of finishing procedures (glazing or polishing) after staining did not improve the survival probability of zirconia monolithic crowns.

染色、上釉和抛光对氧化锆整体冠存活概率的影响
研究目的本体外研究的目的是评估染色、上釉和抛光对使用含5 mol%氧化钇的预着色稳定氧化锆(5Y-TZP)制作的单体牙冠存活概率的影响:采用 CAD/CAM 技术制作上犬齿形状的单体牙冠(厚度为 1.5 毫米),在金属基底上粘接,并将其分为 6 组(n = 21):C组(对照组)、S组(染色组)、G组(上釉组)、P组(抛光组)、SG组(染色和上釉组)和SP组(染色和抛光组)。生存概率是通过在牙冠腭凹处施加负载的阶跃应力加速寿命测试确定的。首先,对试样进行单次加载至断裂测试(SLF),然后进行疲劳测试(5 Hz,浸入温度为 5-55°C 的水中进行热循环),包括轻度加载(9 个)、中度加载(6 个)和重度加载(3 个)(加载范围为 SLF 的 20% 至 60%)。计算存活概率时考虑了失效周期(CFF)和疲劳失效载荷(FFL),并使用 Kaplan-Meier 图进行说明。组间比较采用 Log-Rank 检验(α = 0.05):结果:SLF 的平均值为 586.7 N。结果:SLF 的平均值为 586.7 N,考虑到 CFF 和 FFL,各组的存活概率没有差异:结论:染色、上釉和抛光可以安全进行,不会损害 5Y-TZP 整体牙冠的机械性能:染色可用于鉴定和改善氧化锆整体牙冠的美观。它可用于再现牙冠颈部和色素沟槽的颜色梯度。这项研究表明,染色、上釉和抛光不会影响存活概率,染色后使用抛光程序(上釉或抛光)也不会提高氧化锆整体石牙冠的存活概率。
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 Esthetic and Restorative Dentistry
Journal of Esthetic and Restorative Dentistry 医学-牙科与口腔外科
CiteScore
6.30
自引率
6.20%
发文量
124
审稿时长
>12 weeks
期刊介绍: The Journal of Esthetic and Restorative Dentistry (JERD) is the longest standing peer-reviewed journal devoted solely to advancing the knowledge and practice of esthetic dentistry. Its goal is to provide the very latest evidence-based information in the realm of contemporary interdisciplinary esthetic dentistry through high quality clinical papers, sound research reports and educational features. The range of topics covered in the journal includes: - Interdisciplinary esthetic concepts - Implants - Conservative adhesive restorations - Tooth Whitening - Prosthodontic materials and techniques - Dental materials - Orthodontic, periodontal and endodontic esthetics - Esthetics related research - Innovations in esthetics
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