Messias Ana, Neto Maria Augusta, Piedade Ana Paula, Amaro Ana, Krauser Jack T, Guerra Fernando
Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), Department of Dentistry, Faculty of Medicine, University of Coimbra, 3000-075 Coimbra, Portugal.
Centre for Mechanical Engineering, Materials and Processes (CEMMPRE), Department of Mechanical Engineering, Faculty of Sciences and Technology, University of Coimbra, 3030-788 Coimbra, Portugal.
Materials (Basel). 2025 Apr 9;18(8):1700. doi: 10.3390/ma18081700.
The gold standard materials used for frameworks of full-arch implant-supported fixed prostheses (ISFPs) have traditionally been metal alloys, but recently, high-performance polymers such as polyetherketones and fibre-reinforced resins have been gaining popularity despite the lack of evidence of load-bearing capacity. The aim of the present study was to evaluate the displacements and strains of milled polymeric frameworks for full-arch ISFPs using 3D digital image correlation.
Twelve frameworks were milled from four polymeric materials (three per group): polyetheretherketone (PEEK), polyetherketoneketone (PEKK), poly(methyl methacrylate) (PMMA) and fibre-reinforced composite (FRC). Each framework was fitted with titanium links and screwed to implant analogues embedded in resin and tested for static load-bearing capacity up to 200N. Displacements were captured with two high-speed photographic cameras and analysed with a video correlation system on three spatial axes, U, V, and W, along with principal tensile, compressive and von Mises strains.
PEEK exhibited the highest displacement, indicating greater flexibility, while FRC showed the lowest displacement, suggesting enhanced rigidity. Von Mises strain analysis revealed that PMMA and PEEK experienced higher strain, whereas PEKK and FRC demonstrated lower strain distribution. Bayesian ANOVA provided strong evidence for material differences.
FRC exhibited superior load-bearing characteristics, reinforcing its potential as a viable clinical alternative to metal-based ISFPs.
用于全牙弓种植体支持固定义齿（ISFP）框架的金标准材料传统上一直是金属合金，但最近，尽管缺乏承重能力的证据，聚醚酮和纤维增强树脂等高性能聚合物却越来越受欢迎。本研究的目的是使用三维数字图像相关技术评估全牙弓ISFP的铣削聚合物框架的位移和应变。
从四种聚合物材料（每组三种）铣削出十二个框架：聚醚醚酮（PEEK）、聚醚酮酮（PEKK）、聚甲基丙烯酸甲酯（PMMA）和纤维增强复合材料（FRC）。每个框架都安装有钛连接体，并拧到嵌入树脂中的种植体代型上，测试其高达200N的静态承重能力。用两台高速摄像机捕捉位移，并通过视频相关系统在三个空间轴U、V和W上进行分析，同时分析主拉伸、压缩和冯·米塞斯应变。
PEEK表现出最高的位移，表明其具有更大的柔韧性，而FRC的位移最低，表明其刚性增强。冯·米塞斯应变分析表明，PMMA和PEEK经历的应变较高，而PEKK和FRC的应变分布较低。贝叶斯方差分析为材料差异提供了有力证据。
FRC表现出优异的承重特性，增强了其作为基于金属的ISFP的可行临床替代方案的潜力。
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