后处理程序对增材制造终代种植单冠制造尺寸精度和内部间隙的影响：一项体外研究：3d打印单冠尺寸精度

IF 5.5 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE

Journal of dentistry Pub Date : 2025-09-15 DOI:10.1016/j.jdent.2025.106111

Zhen Mao , Shengxin Weng , Almira Ada Diken Turksayar , Elisabeth Prause , Alessandro Casamenti , Florian Beuer , Franziska Schmidt

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引用次数: 0

摘要

目的：评价后处理方案对3d打印最终种植单冠（ISCs）的准确性和内配合的影响。方法：在3d打印模型的基础上，结合一体式氧化锆植入物，数字化设计ISC。使用树脂基材料通过增材制造（AM）制造了120个最终ISCs。冠体分为12个实验组，每组分别进行洗后和聚合后条件的组合处理。变化包括洗涤溶液（96%异丙醇（IPA）或纯乙醇），洗涤设备（超声波浴或旋转洗衣机）和光聚合条件（空气接触，氮接触或低真空）。采用减法制造（SM）法制备10个ISCs作为对照组。计算了设计数据与扫描数据的均方根值（RMS）以及内部间隙尺寸。统计采用Mann-Whitney U检验和三向方差分析。结果：使用IPA旋转洗涤器可显著提高外部和整体区域的准确性。相比之下，无论分析区域如何，后固化对ISCs的均方根均无显著影响。不同后处理策略在内部差距维度上无显著差异。SM冠在凹版表面的精度明显低于AM冠，且其内部间隙较小。结论：后处理策略对AM ISCs打印精度有影响，但对内部配合无显著影响。尽管凹版表面的尺寸精度较低，但SM ISCs的内部间隙较小，这可能导致冠座早期接触，需要更多地注意凹版调整。意义：AM可推荐用于生产ISCs，但应仔细考虑后处理协议。

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Effect of post-processing procedures on the dimensional accuracy and internal gap of additively manufactured definitive implant-supported single crowns: An in vitro study

Objectives

To evaluate the effects of post-processing protocols on the accuracy and internal fit of 3D-printed definitive implant-supported single crowns (ISCs).

Methods

An ISC was digitally designed based on a 3D-printed model with an incorporated one-piece zirconia implant. 120 definitive ISCs were fabricated by additive manufacturing (AM) using a resin-based material. The crowns were divided into 12 experimental groups, and each group was subjected to combinations of post-washing and post-polymerization conditions. Variations included washing solution (96 % isopropyl alcohol (IPA) or pure ethanol), washing equipment (ultrasonic bath or rotary washer), and photopolymerization conditions (air-contact, nitrogen-contact, or low-vacuum). Ten ISCs were fabricated by subtractive manufacturing (SM) as the control group. The root mean square values (RMS) between the design and acquired scan data, and internal gap dimensions were calculated. Statistics involved the Mann-Whitney U test and three-way ANOVA.

Results

Using a rotary washer with IPA led to significantly higher accuracy in external and overall regions. In contrast, post-curing did not significantly affect the RMS of ISCs regardless of the analyzed region. No significant differences in internal gap dimensions were found among the various post-processing strategies. SM crowns demonstrated significantly lower accuracy in the intaglio surfaces and smaller internal gaps than AM ones.

Conclusions

Post-processing strategies affected the printing accuracy of AM ISCs but had no significant influence on internal fit. SM ISCs exhibited smaller internal gaps despite lower dimensional accuracy of the intaglio surface, which may lead to early contact during crown seating, which requires more attention to intaglio adjustments.

Significance

AM can be recommended for producing ISCs, while post-processing protocols should be carefully considered.

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来源期刊

Journal of dentistry 医学-牙科与口腔外科

CiteScore

7.30

自引率

11.40%

发文量

349

审稿时长

35 days

期刊介绍： The Journal of Dentistry has an open access mirror journal The Journal of Dentistry: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. The Journal of Dentistry is the leading international dental journal within the field of Restorative Dentistry. Placing an emphasis on publishing novel and high-quality research papers, the Journal aims to influence the practice of dentistry at clinician, research, industry and policy-maker level on an international basis. Topics covered include the management of dental disease, periodontology, endodontology, operative dentistry, fixed and removable prosthodontics, dental biomaterials science, long-term clinical trials including epidemiology and oral health, technology transfer of new scientific instrumentation or procedures, as well as clinically relevant oral biology and translational research. The Journal of Dentistry will publish original scientific research papers including short communications. It is also interested in publishing review articles and leaders in themed areas which will be linked to new scientific research. Conference proceedings are also welcome and expressions of interest should be communicated to the Editor.