Survival dependence of 3D-printed temporary materials on the filler content.

IF 1.8 4区医学 Q2 DENTISTRY, ORAL SURGERY & MEDICINE

International Journal of Computerized Dentistry Pub Date : 2023-05-26 DOI:10.3290/j.ijcd.b3759607

Robert Bauer, Julian Zacher, Thomas Strasser, Alois Schmid, Martin Rosentritt

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引用次数: 2

Abstract

Aim: The aim of the present study was the evaluation of the in vitro performance and fracture force of 3D-printed anterior implant-supported temporary partial dentures (TPDs) with different filler content.

Materials and methods: Identical anterior resin-based TPDs (tooth sites 11 to 13; n = eight per material) were 3D printed from methacrylate resins with different filler content. A cartridge polymethyl methacrylate (PMMA) material was used as a reference. After temporary cementation, combined thermal cycling and mechanical loading (TCML) was performed on all the restorations to mimic clinical application. Behavior during TCML and fracture force was determined, and failures were analyzed. Data were statistically investigated (Kolmogorov-Smirnov test, one-way ANOVA; post hoc Bonferroni, Kaplan-Meier survival; α = 0.05).

Results: Failure during TCML varied between three failures and total failure during loading time. Mean survival time varied between 93 ± 206 x 103 cycles and 329 ± 84 x 103 cycles. Significantly different survival cycles between the individual materials could be determined (Mantel Cox log-rank test: chi-square: 21,861; degrees of freedom (df) = 4, P < 0.001). A correlation between filler level and survival cycles could be found (Pearson: 0.186, P = 0.065). Fracture values of the surviving TPDs varied between 499 and 835 N. Failures were characterized by fracture of the connector (n = 24) followed by fractures at the abutment (n = 10).

Conclusions: TDPs showed different filler-dependent survival. Individual 3D-printed materials provided comparable or even better performance than a standard cartridge system and might be sufficient for temporary application of at least half a year.

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3d打印临时材料对填充物含量的生存依赖性。

目的:研究不同填充物含量的3d打印前牙种植临时局部义齿(TPDs)的体外性能和断裂力。材料和方法:相同的前牙树脂基TPDs(牙位11 ~ 13;每种材料n = 8)，由不同填料含量的甲基丙烯酸酯树脂3D打印。以聚甲基丙烯酸甲酯(PMMA)筒状材料作为对照。临时固接后，对所有修复体进行热循环和机械加载(TCML)以模拟临床应用。测定了TCML过程中的行为和断裂力，并对失效进行了分析。对数据进行统计学分析(Kolmogorov-Smirnov检验，单因素方差分析;事后Bonferroni, Kaplan-Meier生存;α = 0.05)。结果:加载时间内TCML的失败程度在三次失败和完全失败之间有所不同。平均生存时间为93±206 × 103周期和329±84 × 103周期。可以确定个体材料之间存在显著差异的生存周期(Mantel Cox log-rank检验:卡方:21861;自由度(df) = 4, P < 0.001)。填充物水平与生存周期之间存在相关性(Pearson: 0.186, P = 0.065)。幸存的tpd的断裂值在499到835 n之间变化，失效的特征是连接器断裂(n = 24)，其次是基台断裂(n = 10)。结论:TDPs存在不同的填充物依赖性生存。单独的3d打印材料提供了与标准墨盒系统相当甚至更好的性能，并且可能足以暂时应用至少半年。

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

International Journal of Computerized Dentistry Dentistry-Dentistry (miscellaneous)

CiteScore

2.90

自引率

0.00%

发文量

期刊介绍： This journal explores the myriad innovations in the emerging field of computerized dentistry and how to integrate them into clinical practice. The bulk of the journal is devoted to the science of computer-assisted dentistry, with research articles and clinical reports on all aspects of computer-based diagnostic and therapeutic applications, with special emphasis placed on CAD/CAM and image-processing systems. Articles also address the use of computer-based communication to support patient care, assess the quality of care, and enhance clinical decision making. The journal is presented in a bilingual format, with each issue offering three types of articles: science-based, application-based, and national society reports.