Assessing the suitability of fused deposition modeling to produce acrylic removable denture bases

IF 1.7 Q3 DENTISTRY, ORAL SURGERY & MEDICINE
Khalid K. Alanazi, Duncan Wood, Joanna Shepherd, Christopher W. Stokes, Ilida Ortega Asencio
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引用次数: 0

Abstract

Objective

To study the feasibility of using poly methyl methacrylate (PMMA) filament and fused deposition modeling (FDM) to manufacture denture bases via the development of a study that considers both conventional and additive-based manufacturing techniques.

Materials and Methods

Five sample groups were compared: heat and cold cured acrylic resins, CAD/CAM milled PMMA, 3D-printed PMMA (via FDM), and 3D-printed methacrylate resin (via stereolithography, SLA). All groups were subjected to mechanical testing (flexural strength, impact strength, and hardness), water sorption and solubility tests, a tooth bonding test, microbiological assessment, and accuracy of fit measurements. The performance of sample groups was referred to ISO 20795-1 and ISO/TS 19736. The data was analyzed using one-way ANOVA.

Results

Samples manufactured using FDM performed within ISO specifications for mechanical testing, water sorption, and solubility tests. However, the FDM group failed to achieve the ISO requirements for the tooth bonding test. FDM samples presented a rough surface finish which could ultimately encourage an undesirable high level of microbial adhesion. For accuracy of fit, FDM samples showed a lower degree of accuracy than existing materials.

Conclusions

Although FDM samples were a cost-effective option and were able to be quickly manufactured in a reproducible manner, the results demonstrated that current recommended testing regimes for conventionally manufactured denture-based polymers are not directly applicable to additive-manufactured denture base polymers. Therefore, new standards should be developed to ensure the correct implementation of additive manufacturing techniques within denture-based fabrication workflow.

Abstract Image

评估熔融沉积模型是否适用于制作丙烯酸活动义齿基托。
目的:研究使用聚甲基丙烯酸甲酯(PMMA)长丝和熔融沉积建模(FDM)制造义齿基托的可行性,同时考虑传统制造技术和增材制造技术:比较了五组样品:热固化和冷固化丙烯酸树脂、CAD/CAM 铣削 PMMA、3D 打印 PMMA(通过 FDM)和 3D 打印甲基丙烯酸酯树脂(通过立体光刻,SLA)。所有样品组都接受了机械测试(抗弯强度、冲击强度和硬度)、吸水性和溶解性测试、牙齿粘合测试、微生物评估和配合精度测量。样品组的性能参照了 ISO 20795-1 和 ISO/TS 19736 标准。数据采用单因素方差分析:结果:使用 FDM 制造的样品在机械测试、吸水性和溶解性测试中均符合 ISO 规范。但是,FDM 组在牙齿粘合测试中未能达到 ISO 的要求。FDM 制成的样品表面粗糙,最终可能会助长微生物的大量附着。在贴合精度方面,FDM 样品的精度低于现有材料:尽管 FDM 样品是一种具有成本效益的选择,而且能够以可重复的方式快速制造,但结果表明,目前针对传统制造的义齿基底聚合物所推荐的测试制度并不能直接适用于添加剂制造的义齿基底聚合物。因此,应制定新的标准,以确保在义齿基托制造工作流程中正确使用添加剂制造技术。
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来源期刊
Clinical and Experimental Dental Research
Clinical and Experimental Dental Research DENTISTRY, ORAL SURGERY & MEDICINE-
CiteScore
3.30
自引率
5.60%
发文量
165
审稿时长
26 weeks
期刊介绍: Clinical and Experimental Dental Research aims to provide open access peer-reviewed publications of high scientific quality representing original clinical, diagnostic or experimental work within all disciplines and fields of oral medicine and dentistry. The scope of Clinical and Experimental Dental Research comprises original research material on the anatomy, physiology and pathology of oro-facial, oro-pharyngeal and maxillofacial tissues, and functions and dysfunctions within the stomatognathic system, and the epidemiology, aetiology, prevention, diagnosis, prognosis and therapy of diseases and conditions that have an effect on the homeostasis of the mouth, jaws, and closely associated structures, as well as the healing and regeneration and the clinical aspects of replacement of hard and soft tissues with biomaterials, and the rehabilitation of stomatognathic functions. Studies that bring new knowledge on how to advance health on the individual or public health levels, including interactions between oral and general health and ill-health are welcome.
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