Effect of repair methods and materials on the flexural strength of 3D-printed denture base resin.

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

Journal of Advanced Prosthodontics Pub Date : 2022-10-01 Epub Date: 2022-10-28 DOI:10.4047/jap.2022.14.5.305

Hamile Emanuella do Carmo Viotto, Marcela Dantas Dias Silva, Thaís Soares Bezerra Santos Nunes, Sabrina Romão Gonçalves Coelho, Ana Carolina Pero

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引用次数: 2

Abstract

Purpose: The aim of this study was to evaluate the flexural strength of a 3D-printed denture base resin (Cosmos Denture), after different immediate repair techniques with surface treatments and thermocycling.

Materials and methods: Rectangular 3D-printed denture base resin (Cosmos Denture) specimens (N = 130) were thermocycled (5,000 cycles, 5℃ and 55℃) before and after the different repair techniques (n = 10 per group) using an autopolymerized acrylic resin (Jet, J) or a hard relining resin (Soft Confort, SC), and different surface treatments: Jet resin monomer for 180 s (MMA), blasting with aluminum oxide (JAT) or erbium: yttrium-aluminum-garnet laser (L). The control group were intact specimens. A three-point flexural strength test was performed, and data (MPa) were analyzed by ANOVA and Games-Howell post hoc test (α = 0.05). Each failure was observed and classified through stereomicroscope images and the surface treatments were viewed by scanning electron microscope (SEM).

Results: Control group showed the highest mean of flexural strength, statistically different from the other groups (P < .001), followed by MMA+J group. The groups with L treatment were statistically similar to the MMA groups (P > .05). The JAT+J group was better than the SC and JAT+SC groups (P < .05), but similar to the other groups (P > .05). Adhesive failures were most observed in JAT groups, especially when repaired with SC. The SEM images showed surface changes for all treatments, except JAT alone.

Conclusion: Denture bases fabricated with 3D-printed resin should be preferably repaired with MMA+J. SC and JAT+SC showed the worst results. Blasting impaired the adhesion of the SC resin.

Abstract Image

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修复方法和材料对3d打印义齿基托树脂抗弯强度的影响。

目的:本研究的目的是评估3d打印义齿基托树脂(Cosmos denture)在不同的表面处理和热循环的即时修复技术后的弯曲强度。材料与方法:将3d打印的长方义齿基托树脂(Cosmos denture)标本(N = 130)在采用自聚合丙烯酸树脂(Jet, J)或硬质内衬树脂(Soft舒适性，SC)进行不同修复技术(N = 10 /组)前后分别进行5000次、5℃和55℃的热循环，并进行不同表面处理:喷射树脂单体180 s (MMA)、氧化铝(JAT)或铒钇铝garnet激光(L)喷砂，对照组为完整标本。进行三点抗弯强度检验，数据(MPa)采用方差分析和game - howell事后检验(α = 0.05)。通过体视显微镜观察和分类每一次失效，并通过扫描电镜观察表面处理。结果:对照组屈曲强度均值最高，与其他组比较差异有统计学意义(P < 0.001)， MMA+J组次之。L组与MMA组比较差异有统计学意义(P > 0.05)。JAT+J组优于SC和JAT+SC组(P < 0.05)，其他组与JAT+SC组相似(P > 0.05)。在JAT组中观察到的黏合剂失效最多，特别是当用SC修复时。扫描电镜图像显示，除了JAT单独处理外，所有处理的表面都发生了变化。结论:3d打印树脂义齿基托宜采用MMA+J修复。SC和JAT+SC表现最差。喷砂破坏了SC树脂的附着力。

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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.