Diken Türksayar Almira Ada, Schulnig Sandra, Spintzyk Sebastian, Yeşil Kurt İrem Beril
Associate Professor and Department Head, Department of Prosthodontics, Biruni University, Faculty of Dentistry, İstanbul, Turkey; and Guest Researcher, ADMiRE Research Center, Carinthia University of Applied Sciences, Villach, Austria.
Senior Researcher, ADMiRE Research Center, Carinthia University of Applied Sciences, Villach, Austria.
J Prosthet Dent. 2025 Jul;134(1):237.e1-237.e8. doi: 10.1016/j.prosdent.2025.03.010. Epub 2025 Apr 1.
Current knowledge regarding the influence of infill pattern and layer height on the flexural and shear bond strength of polyetheretherketone (PEEK) manufactured via fused filament fabrication technology remains limited.
The purpose of this in vitro study was to investigate the impact of infill pattern and layer height on the shear bond strength (SBS) and the flexural strength (FS) of additively manufactured PEEK bars and disks relevant to dental applications.
The PEEK specimens were prepared in 9 groups (n=10), whereby different layer heights (0.1, 0.2, and 0.3 mm) and different infill patterns (±30, ±45 lines, concentric) were used. The surface roughness (Ra) was recorded with a confocal microscope. For the SBS test, resin composites were applied on the disk surface. All the specimens were subjected to thermal aging. The SBS and FS test was performed through a universal testing device. Two-way ANOVA, 1-way ANOVA, post hoc Tukey, and Tamhane tests were used for statistical analysis. (α=.05) RESULTS: The highest SBS values were observed at a layer height of 0.1 mm. The infill pattern had a significant effect on FS at all layer heights (0.1 mm P=.016, 0.2 mm P=.010, 0.3 mm P=.010). While the highest FS values at a 0.1-mm layer height were observed in the concentric pattern, no significant difference was identified between the L45 and L30 groups (P=.186).
Lower layer heights strongly influenced the Ra, SBS and FS, with the highest SBS achieved with a layer height of 0.1 mm. To improve the mechanical properties of PEEK, the process parameters for additive manufacturing should be optimized.
目前关于填充图案和层高对通过熔融长丝制造技术制造的聚醚醚酮（PEEK）的弯曲和剪切粘结强度的影响的知识仍然有限。
本体外研究的目的是调查填充图案和层高对与牙科应用相关的增材制造PEEK棒和盘的剪切粘结强度（SBS）和弯曲强度（FS）的影响。
将PEEK标本分为9组（n = 10），使用不同的层高（0.1、0.2和0.3毫米）和不同的填充图案（±30、±45线、同心）。用共聚焦显微镜记录表面粗糙度（Ra）。对于SBS测试，将树脂复合材料涂覆在盘表面。所有标本都进行了热老化。通过通用测试装置进行SBS和FS测试。使用双向方差分析、单向方差分析、事后Tukey检验和Tamhane检验进行统计分析。（α = 0.05）结果：在层高为0.1毫米时观察到最高的SBS值。填充图案在所有层高下对FS都有显著影响（0.1毫米P = 0.016，0.2毫米P = 0.010，0.3毫米P = 0.010）。虽然在0.1毫米层高下，同心图案中观察到最高的FS值，但L45和L30组之间未发现显著差异（P = 0.186）。
较低的层高强烈影响Ra、SBS和FS，层高为0.1毫米时获得最高的SBS。为了提高PEEK的机械性能，应优化增材制造的工艺参数。
