Effect of ethylene oxide unit number in bis-EMA on the physical properties of additive-manufactured occlusal splint material.

IF 3.2 2区医学 Q1 DENTISTRY, ORAL SURGERY & MEDICINE Journal of prosthodontic research Pub Date : 2024-10-16 Epub Date: 2024-01-29 DOI:10.2186/jpr.JPR_D_23_00203

Junichiro Wada, Paulina Heponiemi, Kanae Wada, Sufyan Garoushi, Noriyuki Wakabayashi, Tsutomu Iwamoto, Pekka K Vallittu, Lippo Lassila

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Abstract

Purpose: To investigate the effects of the number of ethylene oxide units in bis-EMA on the physical properties of additively manufactured occlusal splints.

Methods: Seven experimental materials containing bis-EMAs with three and 10 ethylene oxide units (BE3 and BE10, respectively) were prepared at different BE10 content rates (BE10-0%, -20%, -30%, -40%, -50%, -60%, and -80%). Half the specimens of each material were aged in boiling water. Flexural strength (FS), flexural modulus (FM), fracture toughness (FT), microwear depth (MD), degree of conversion (DC), water sorption (WSP), water solubility (WSL), color difference between non-aged and aged series (ΔE), and translucency (TP) were evaluated. All the evaluated properties other than FS and MD were analyzed by 1-way ANOVA and Tukey's post hoc analysis, while FS and MD were analyzed by Kruskal-Wallis's test and Bonferroni correction (α=0.05).

Results: BE10-80% revealed the lowest FS (P < 0.01 for BE10-0%, -20%, and -30%) and FM (P < 0.01, for all), while revealing the highest DC, WSP, WSL (P < 0.01 for all) and TP (P < 0.01 for all other than BE10-60%). BE10-50% showed the highest FT (P < 0.01 for all). BE10-50%, -60%, and -80% revealed significantly lower ΔE than others (P < 0.01) and lower MD than BE10-0% (P < 0.05). Regardless of the BE10 content, FS, FM, and FT decreased with aging.

Conclusions: The number of ethylene oxide units affects the physical properties of additively manufactured occlusal splints. The higher number of ethylene oxide units in bis-EMA enhanced the microwear resistance, DC, WSP, WSL, color stability, and translucency, whereas it deteriorated the FS and FM.

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双-EMA 中环氧乙烷单位数对添加剂制造的咬合夹板材料物理性能的影响。

目的：研究双-EMA 中环氧乙烷单元的数量对加成法制造的咬合夹板物理性能的影响：以不同的 BE10 含量率（BE10-0%、-20%、-30%、-40%、-50%、-60% 和 -80%）制备了七种含有三个和十个环氧乙烷单元（分别为 BE3 和 BE10）的双-EMA 实验材料。每种材料的一半试样在沸水中老化。对抗弯强度 (FS)、抗弯模量 (FM)、断裂韧性 (FT)、微磨损深度 (MD)、转换度 (DC)、吸水性 (WSP)、水溶性 (WSL)、未老化和老化系列之间的色差 (ΔE) 以及半透明度 (TP) 进行了评估。除 FS 和 MD 外，其他所有评估特性均采用单因素方差分析和 Tukey 后分析，而 FS 和 MD 则采用 Kruskal-Wallis 检验和 Bonferroni 校正（α=0.05）：BE10-80%显示出最低的FS（BE10-0%、-20%和-30%的P < 0.01）和FM（所有的P < 0.01），同时显示出最高的DC、WSP、WSL（所有的P < 0.01）和TP（除BE10-60%外，所有的P < 0.01）。BE10-50% 显示出最高的 FT（P < 0.01）。BE10-50%、-60% 和 -80% 的 ΔE 明显低于其他（P < 0.01），MD 低于 BE10-0%（P < 0.05）。无论 BE10 含量如何，FS、FM 和 FT 都随着老化而减少：结论：环氧乙烷单元的数量会影响加成法制造的咬合夹板的物理性能。双-EMA 中环氧乙烷单元数越多，耐磨性、DC、WSP、WSL、颜色稳定性和半透明性越好，而 FS 和 FM 则越差。

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来源期刊

Journal of prosthodontic research DENTISTRY, ORAL SURGERY & MEDICINE-

CiteScore

6.90

自引率

11.10%

发文量

161

期刊介绍： Journal of Prosthodontic Research is published 4 times annually, in January, April, July, and October, under supervision by the Editorial Board of Japan Prosthodontic Society, which selects all materials submitted for publication. Journal of Prosthodontic Research originated as an official journal of Japan Prosthodontic Society. It has recently developed a long-range plan to become the most prestigious Asian journal of dental research regarding all aspects of oral and occlusal rehabilitation, fixed/removable prosthodontics, oral implantology and applied oral biology and physiology. The Journal will cover all diagnostic and clinical management aspects necessary to reestablish subjective and objective harmonious oral aesthetics and function. The most-targeted topics: 1) Clinical Epidemiology and Prosthodontics 2) Fixed/Removable Prosthodontics 3) Oral Implantology 4) Prosthodontics-Related Biosciences (Regenerative Medicine, Bone Biology, Mechanobiology, Microbiology/Immunology) 5) Oral Physiology and Biomechanics (Masticating and Swallowing Function, Parafunction, e.g., bruxism) 6) Orofacial Pain and Temporomandibular Disorders (TMDs) 7) Adhesive Dentistry / Dental Materials / Aesthetic Dentistry 8) Maxillofacial Prosthodontics and Dysphagia Rehabilitation 9) Digital Dentistry Prosthodontic treatment may become necessary as a result of developmental or acquired disturbances in the orofacial region, of orofacial trauma, or of a variety of dental and oral diseases and orofacial pain conditions. Reviews, Original articles, technical procedure and case reports can be submitted. Letters to the Editor commenting on papers or any aspect of Journal of Prosthodontic Research are welcomed.