Article
Polymer Science
Jinghui Yang, Jun Xie, Kaipeng Ji, Xianghong Wang, Xiaolong Jiao, Zhinong Xu, Peng Zhao
Summary: Microcellular PEEK was prepared by injection molding and the effects of process parameters on its properties were studied. Two types of microcellular PEEK with good performance were obtained after optimization, and the effect of carbon fiber was preliminarily investigated.
Article
Chemistry, Physical
Krzysztof Schmeidl, Michal Wieczorowski, Katarzyna Grocholewicz, Michal Mendak, Joanna Janiszewska-Olszowska
Summary: The study found that the Gummetal orthodontic wire exhibited similar frictional resistance as the NiTi and CoCr wires, making it suitable for sliding mechanics. Stainless steel alloy had significantly lower frictional resistance values compared to other groups, while the TiMo wires showed significantly higher frictional resistance.
Article
Materials Science, Characterization & Testing
Nan Jiang, Peijie Tan, Miaomiao He, Jie Zhang, Dan Sun, Songsong Zhu
Summary: In this study, graphene nanoplatelet reinforced PEEK composites were fabricated and evaluated for their mechanical properties, biocompatibility, and bone repair function. The results showed that adding graphene significantly enhances the material's toughness and promotes adhesion and differentiation of rat bone marrow stromal cells.
Article
Materials Science, Multidisciplinary
Honggang Dong, Zuyang Tang, Peng Li, Baosheng Wu, Xiaohu Hao, Chaoqun Ma
Summary: The study focused on the weldability of a hybrid structure made of aluminum alloy and carbon fiber reinforced plastics. Through friction stir spot welding, joint fabrication of the materials revealed that dwell time and plunge speed were crucial factors affecting the ultimate tensile shear load. The interface was divided into different zones, with the shoulder-affected zone and pin-affected zone being vital for mechanical properties. Bonding mechanism involved adhesive bonding, macro-mechanical interlocking, and micro-mechanical interlocking, providing insights for improving mechanical properties.
MATERIALS & DESIGN
(2021)
Article
Polymer Science
Ruoxiang Gao, Jun Xie, Jinghui Yang, Chaojie Zhuo, Jianzhong Fu, Peng Zhao
Summary: By conducting single factor experiments, the impact of raster angle and infill density on PEEK parts was determined, while orthogonal experiments were used to analyze the effects of printing speed, nozzle temperature, and other parameters. Through optimization, significant reductions in warpage deformation and improvements in tensile strength were achieved, supporting the development of FDM for PEEK.
Article
Engineering, Mechanical
Zonglin Pan, Qinzhao Zhou, Pengfei Wang, Dongfeng Diao
Summary: The study demonstrates that carbon films can significantly reduce friction between stainless steel archwires and brackets, with archwires coated in graphene embedded carbon films showing the lowest friction coefficient. Prolonged immersion in artificial saliva, however, can deteriorate the friction behavior of the coated archwires.
Article
Materials Science, Multidisciplinary
Maihemuti Yakufu, Zongliang Wang, Jianguo Liu, Peibiao Zhang
Summary: Porous polyether ether ketone (PEEK) scaffolds with hydroxyapatite (HA) layer coated on the pore wall surface were prepared using a sacrificial porogen of HA-coated sodium chloride (NaCl) microspheres. The PEEK@HA scaffolds exhibited superior in vitro biomineralization and in vivo osseointegration, providing a facile manufacturing strategy for integratedly fabricating bio-nic porous PEEK scaffolds with a mineralized coating layer.
MATERIALS & DESIGN
(2022)
Article
Materials Science, Multidisciplinary
Jinghui Yang, Jun Xie, Kaipeng Ji, Xianghong Wang, Xiaolong Jiao, Zhinong Xu, Peng Zhao
Summary: Microcellular PEEK with a weight reduction of 49.6% was prepared by mold-opening microcellular injection molding (MOMIM). Incremental holding time and holding pressure could increase PEEK's density and promote the formation of dense cells, improving mechanical properties.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Biotechnology & Applied Microbiology
Rupak Dua, Onessa Sharufa, Joi Terry, William Dunn, Indu Khurana, Jagasivamani Vadivel, Yue Zhang, Henry J. Donahue
Summary: In this study, a porous PEEK structure was developed using a chemical etching method, and three post-treatments were performed to improve bone cell adhesion and proliferation. Surface characterization showed that the treated groups had porous structures with increased roughness and different surface chemistry. Cell toxicity decreased, and alkaline phosphatase activity increased, indicating enhanced osteoblastic cell differentiation and osteogenic potential.
FRONTIERS IN BIOENGINEERING AND BIOTECHNOLOGY
(2023)
Article
Mechanics
Bowen Wang, Shundong Yu, Jian Mao, Yaohui Wang, Mengjia Li, Xiping Li
Summary: Short basalt fiber reinforced PEEK composites exhibit increased surface roughness, decreased friction coefficient, and the lowest specific wear rate, along with good ultimate tensile strength and elongation at break. Thermal and rheological behaviors of the composites were also investigated to understand the effect of basalt fiber on the crystallization performance and flow abilities of PEEK composites.
COMPOSITE STRUCTURES
(2021)
Article
Engineering, Manufacturing
Jing Pu, Claire McIlroy, Arthur Jones, Ian Ashcroft
Summary: By conducting DMA analysis on the mechanical properties of PEEK single filament walls constructed using FFF under different printing conditions, differences were identified. A non-isothermal quiescent crystallization model was used to understand the findings, and a correlation between predicted crystal fraction and storage modulus was established.
ADDITIVE MANUFACTURING
(2021)
Article
Biophysics
Chongxing Liu, Zhuo Huang, Jinlei Zhu, Xiangzhi Liu, Bingbing Zhu, Dongyang Zheng, Bingqian Yang, Ran Tao, Chenxi Cai, Xiao Chen, Jinsong Liu, Zhennan Deng
Summary: This study aimed to investigate the cytotoxicity and sustainable antibacterial activity of unmodified PEEK under specific wavelength light treatment (365 nm), and discussed its antibacterial mechanism. PEEK was irradiated with near-ultraviolet light (365 nm, 5 W, 30 min, 100 mm distance). Cell experiments showed no cytotoxicity of PEEK. Antibacterial tests revealed significant antibacterial effects against Staphylococcus aureus, Streptococcus mutans, Streptococcus gordonii, and Streptococcus sanguis, but no effect against Escherichia coli. Spectrophotometry confirmed the existence of singlet oxygen, and lactate dehydrogenase assay verified the membrane rupture of Staphylococcus aureus. The water contact angle of PEEK did not change significantly after 15 cycles of light treatment. Cyclic antibacterial experiments demonstrated sustainable antibacterial effects. In conclusion, this study showed that PEEK exhibits good cytocompatibility and stable antibacterial properties under near-ultraviolet light, providing a new solution for its non-antibacterial nature and supporting its further application in dentistry.
COLLOIDS AND SURFACES B-BIOINTERFACES
(2023)
Review
Engineering, Biomedical
Junfeng Chen, Guangxiu Cao, Linhao Li, Qiang Cai, Nicholas Dunne, Xiaoming Li
Summary: Bone damage requires the use of bone implant materials for treatment, and polyether ether ketone (PEEK) has been considered as a next-generation material due to its advantages. However, modification is needed to improve its integration with adjacent bones. This systematic review summarizes the recent advances and application prospects of PEEK modification as bone implants, and discusses remaining challenges.
BIOMEDICAL MATERIALS
(2022)
Article
Engineering, Biomedical
Hongyun Ma, Hao Han, Xiaoming Zhao, Junping Ma, Xiaoyan Qu, Xiaoxiao Lou, Angxiu Suonan, Bo Lei, Yingang Zhang
Summary: A multifunctional PEEK implant (PEEK-PDA-BGNs) with good mechanics-adaptability, biomineralization ability, immunoregulation ability, antibacterial activity, and osteogenic activity, is constructed by surface deposition of polydopamine-bioactive glass nanoparticles (PDA-BGNs) on PEEK. PEEK-PDA-BGNs can improve the osseointegration and osteogenesis ability of PEEK implants, induce the M2 phenotype polarization of macrophages, and show good photothermal antibacterial activity against E. coli and MRSA.
ADVANCED HEALTHCARE MATERIALS
(2023)
Article
Polymer Science
Sunil Kumar Vaddamanu, Fahad Hussain Alhamoudi, Saurabh Chaturvedi, Nasser M. Alqahtani, Mohamed Khaled Addas, Mohammad Al Alfarsi, Rajesh Vyas, Masroor Ahmed Kanji, Mohammad A. Zarbah, Waleed M. S. Alqahtani, Saeed M. Alqahtani, Adel M. Abdelmonem, Asim Elsir Elmahdi
Summary: This study compared the retentive forces and fitting surface deformation of PEEK and Co-Cr clasps. The results showed that Co-Cr clasps had higher initial and final retentive forces, while PEEK clasps had lower deformation. PEEK clasps with 1.5mm thickness and 0.25mm undercut had the least deformation.
