Effect of sintering programs and surface treatments on monolithic zirconia.

IF 2.7 3区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of Advanced Prosthodontics Pub Date : 2024-02-01 Epub Date: 2024-02-23 DOI:10.4047/jap.2024.16.1.25

Seren Nur Dokuzlu, Meryem Gülce Subaşı

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引用次数: 0

Abstract

Purpose: To investigate the effect of sintering programs and surface treatments on surface properties, phase transformation and flexural strength of monolithic zirconia.

Materials and methods: Zirconia specimens were sintered using three distinct sintering programs [classic (C), speed (S), and superspeed (SS)] (n = 56, each). One sample from each group underwent scanning electron microscopy (SEM) and grain size analysis following sintering. Remaining samples were divided into five subgroups (n = 11) based on the surface treatments: control (CL), polish (P), glaze (G), grind + polish (GP), and grind + glaze (GG). One sample from each subgroup underwent SEM analysis. Remaining samples were thermally aged. Monoclinic phase volume, surface roughness, and three-point flexural strength were measured. Monoclinic phase volume and surface roughness were analyzed by Kruskal-Wallis and Dunn tests. Flexural strength was analyzed by two-way ANOVA and Weibull analysis. The relationships among the groups were analyzed using Spearman's correlation analysis.

Results: Sintering program, surface treatment, and sintering × surface treatment (P ≤ .010) affected the monoclinic phase volume, whereas the type of surface treatment and sintering × surface treatment affected the surface roughness (P < .001). Type of sintering program or surface treatment did not affect the flexural strength. Weibull analysis revealed no significant differences between the m and σ_o values. Monoclinic phase volume was positively correlated with surface roughness in the SGG and SSP groups.

Conclusion: After sintering monolithic zirconia in each of the three sintering programs, each of the surface treatments can be used. However, for surface quality and aging resistance, G or GG can be recommended as a surface finishing method.

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烧结程序和表面处理对整体氧化锆的影响

目的：研究烧结程序和表面处理对整体氧化锆表面特性、相变和抗弯强度的影响：采用三种不同的烧结程序[经典烧结程序（C）、高速烧结程序（S）和超速烧结程序（SS）]烧结氧化锆试样（每组 n = 56）。每组中有一个样品在烧结后进行了扫描电子显微镜（SEM）和晶粒度分析。其余样品根据表面处理分为五个子组（n = 11）：对照组（CL）、抛光组（P）、上釉组（G）、研磨 + 抛光组（GP）和研磨 + 上釉组（GG）。每个子组的一个样品都进行了 SEM 分析。其余样品进行热老化。测量了单斜相体积、表面粗糙度和三点抗折强度。单斜相体积和表面粗糙度通过 Kruskal-Wallis 和 Dunn 检验进行分析。抗折强度采用双向方差分析和 Weibull 分析法进行分析。各组之间的关系采用斯皮尔曼相关分析法进行分析：烧结程序、表面处理和烧结 × 表面处理（P ≤ .010）影响单斜相体积，而表面处理类型和烧结 × 表面处理影响表面粗糙度（P < .001）。烧结程序或表面处理类型对抗弯强度没有影响。Weibull 分析显示，m 值和σo 值之间没有显著差异。在 SGG 和 SSP 组中，单斜相体积与表面粗糙度呈正相关：结论：用三种烧结程序烧结整体氧化锆后，每种表面处理方法都可以使用。不过，为了保证表面质量和耐老化性，建议采用 G 或 GG 作为表面处理方法。

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来源期刊

Journal of Advanced Prosthodontics DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

4.70

自引率

3.80%

发文量

期刊介绍： This journal aims to convey scientific and clinical progress in the field of prosthodontics and its related areas to many dental communities concerned with esthetic and functional restorations, occlusion, implants, prostheses, and biomaterials related to prosthodontics. This journal publishes • Original research data of high scientific merit in the field of diagnosis, function, esthetics and stomatognathic physiology related to prosthodontic rehabilitation, physiology and mechanics of occlusion, mechanical and biologic aspects of prosthodontic materials including dental implants. • Review articles by experts on controversies and new developments in prosthodontics. • Case reports if they provide or document new fundamental knowledge.