Influence of Stainless Steel Mesh Size and Universal Adhesive Primer on Flexural Strength of Repaired PMMA Denture Base Resin

IF 2.2 Q3 DENTISTRY, ORAL SURGERY & MEDICINE Clinical and Experimental Dental Research Pub Date : 2025-04-07 DOI:10.1002/cre2.70127

Gray H. Li, Vidya Mudaliar, Andrew B. Cameron, John M. Aarts, Joanne J. E. Choi

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Abstract

Objectives

To evaluate the effect of the size of stainless steel mesh and universal adhesive primer on the flexural strength of repaired polymethylmethacrylate (PMMA) denture base resin.

Materials and Methods

A total of 120 heat-cured PMMA specimens with dimensions of 5 × 50 × 30 mm were prepared and repaired with two different sizes of stainless steel mesh reinforcement, one group with med-fine mesh (size 0.42 mm²) and the second group with fine mesh (size 0.09 mm²). One subgroup was primed with a universal adhesive primer (Scotchbond Universal). Half of the specimens from each subgroup were subjected to artificial aging. The flexural strength was obtained by three-point bend testing. Data were statistically analyzed using ANOVA and post hoc analysis (SPSS V28). The probability of failure was calculated using Weibull analysis. Scanning electron microscopy analysis was used to identify the mode of failure.

Results

A significantly higher mean flexural strength (p < 0.05) was recorded in primed groups non-thermocycled with fine mesh (174.80 ± 50.27 MPa) and medium mesh (160.87 ± 41.50 MPa) compared to non-primed groups. Non-primed specimens with fine mesh exhibited the highest Weibull modulus (5.86), whereas that of primed medium mesh had the lowest Weibull modulus (2.64). Adhesive failure was identified at the interface of the stainless steel mesh and the self-cure acrylic resin.

Conclusion

Application of the universal adhesive primer to both mid-fine and fine stainless steel mesh significantly improved the flexural strength of the repaired PMMA heat-cured acrylic resin, and reinforcement with primed fine stainless steel mesh resulted in significantly higher flexural strength of repaired PMMA heat-cured an acrylic resin.

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不锈钢网孔尺寸及万能粘结底漆对修复后PMMA基托树脂抗弯强度的影响

目的探讨不锈钢网片尺寸和万能粘结底漆对PMMA义齿基托树脂修复体抗弯强度的影响。材料与方法制备尺寸为5 × 50 × 30 mm的热固化PMMA试件120例，采用中细网（0.42 mm2）和细网（0.09 mm2）两种不同尺寸的不锈钢补强网进行修复。一个亚组用通用粘合剂底漆（Scotchbond universal）。每个亚组各取一半标本进行人工老化处理。通过三点弯曲试验获得了弯曲强度。数据采用方差分析和事后分析（SPSS V28）进行统计学分析。采用威布尔分析计算故障概率。用扫描电镜分析确定了失效模式。结果与未预热组相比，预热组的平均抗弯强度显著提高（p < 0.05），细网（174.80±50.27 MPa）和中网（160.87±41.50 MPa）。未处理的细网试件的威布尔模量最高（5.86），处理的中等网试件的威布尔模量最低（2.64）。确定了不锈钢网与自固化丙烯酸树脂界面的粘结失效。结论中细、细不锈钢网应用万能粘结底漆后，修复后的PMMA热固化丙烯酸树脂的抗弯强度均有明显提高，而带底漆的细不锈钢网补强后，修复后的PMMA热固化丙烯酸树脂的抗弯强度有明显提高。

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来源期刊

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.