The Experts below are selected from a list of 7758 Experts worldwide ranked by ideXlab platform
Nam-su Chung - One of the best experts on this subject based on the ideXlab platform.
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Subsidence of polyetheretherketone cage after minimally invasive transforaminal lumbar interbody fusion.
Journal of Spinal Disorders & Techniques, 2013Co-Authors: Moon-chan Kim, Hung-tae Chung, Jae-lim Cho, Dong-jun Kim, Nam-su ChungAbstract:Study Design:A retrospective case series.Objective:The aim of this study was to determine the rate of cage subsidence after minimally invasive transforaminal lumbar interbody fusion (MITLIF) conducted using a polyetheretherketone (PEEK) cage, and to identify associated risk factors.Summary of Backgr
Lihhuei Chen - One of the best experts on this subject based on the ideXlab platform.
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outcomes of interbody fusion cages used in 1 and 2 levels anterior cervical discectomy and fusion titanium cages versus polyetheretherketone peek cages
Journal of Spinal Disorders & Techniques, 2010Co-Authors: Jenchung Liao, Wenjer Chen, Lihhuei ChenAbstract:Study DesignA prospective study was performed in case with cervical spondylosis who underwent anterior cervical discectomy and fusion (ACDF) with titanium or polyetheretherketone (PEEK) cages.ObjectiveTo find out which fusion cage yielded better clinical and radiographic results.Summary of Backgroun
Bogna Stawarczyk - One of the best experts on this subject based on the ideXlab platform.
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Is the high-performance thermoplastic polyetheretherketone indicated as a clasp material for removable dental prostheses?
Clinical Oral Investigations, 2020Co-Authors: Danka Micovic, Felicitas Mayinger, Sebastian Bauer, Malgorzata Roos, Marlis Eichberger, Bogna StawarczykAbstract:Objectives To investigate the retention force of polyetheretherketone (PEEK) removable dental prosthesis clasps in comparison with a cobalt-chrome-molybdenum control group after storage in artificial saliva. Materials and Methods Clasps were milled (Dentokeep (PEEKmilled1), NT digital implant technology; breCAM BioHPP Blank (PEEKmilled2), bredent), pressed (BioHPP Granulat for 2 press (PEEKpressed), bredent), or cast (remanium GM 800+ (cobalt-chrome-molybdenum), Dentaurum); N = 60, n = 15/subgroup. Retention force was examined 50 times/specimen in a pull-off test using the universal testing machine (Zwick 1445), where pull-off force was applied with a crosshead speed of 5 mm/minute until the maximum force dropped by 10%, at different aging levels: (1) initial, after storage in artificial saliva for (2) 90 and (3) 180 days. Statistical analysis was performed using one-way ANOVA followed by post hoc Scheffé-test and mixed models ( p < 0.05). Results Cobalt-chrome-molybdenum presented the highest retention force. No differences were observed between polyetheretherketone materials. Cobalt-chrome-molybdenum showed a significant decrease of its values after artificial aging, while polyetheretherketone materials presented similar results over the course of aging. Regarding a repetitive insertion and removal, even though PEEKmilled2 and cobalt-chrome-molybdenum showed an initial increase, ultimately, a decrease in retention force was observed for all tested groups. Conclusions Although the control group showed significantly higher results, the retention force of polyetheretherketone materials indicate a potential clinical application. Neither the manufacturing process nor artificial aging showed an impact on the retention force of polyetheretherketone clasps. Clinical relevance Mechanical properties of novel removable dental prosthesis clasp materials devised to meet the growing esthetic demands of patients need to be investigated to ensure a successful long-term clinical application.
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Is the high-performance thermoplastic polyetheretherketone indicated as a clasp material for removable dental prostheses?
Clinical Oral Investigations, 2020Co-Authors: Danka Micovic, Felicitas Mayinger, Malgorzata Roos, Marlis Eichberger, Sebastian S. Bauer, Bogna StawarczykAbstract:OBJECTIVES To investigate the retention force of polyetheretherketone (PEEK) removable dental prosthesis clasps in comparison with a cobalt-chrome-molybdenum control group after storage in artificial saliva. MATERIALS AND METHODS Clasps were milled (Dentokeep (PEEKmilled1), NT digital implant technology; breCAM BioHPP Blank (PEEKmilled2), bredent), pressed (BioHPP Granulat for 2 press (PEEKpressed), bredent), or cast (remanium GM 800+ (cobalt-chrome-molybdenum), Dentaurum); N = 60, n = 15/subgroup. Retention force was examined 50 times/specimen in a pull-off test using the universal testing machine (Zwick 1445), where pull-off force was applied with a crosshead speed of 5 mm/minute until the maximum force dropped by 10%, at different aging levels: (1) initial, after storage in artificial saliva for (2) 90 and (3) 180 days. Statistical analysis was performed using one-way ANOVA followed by post hoc Scheffe-test and mixed models (p < 0.05). RESULTS Cobalt-chrome-molybdenum presented the highest retention force. No differences were observed between polyetheretherketone materials. Cobalt-chrome-molybdenum showed a significant decrease of its values after artificial aging, while polyetheretherketone materials presented similar results over the course of aging. Regarding a repetitive insertion and removal, even though PEEKmilled2 and cobalt-chrome-molybdenum showed an initial increase, ultimately, a decrease in retention force was observed for all tested groups. CONCLUSIONS Although the control group showed significantly higher results, the retention force of polyetheretherketone materials indicate a potential clinical application. Neither the manufacturing process nor artificial aging showed an impact on the retention force of polyetheretherketone clasps. CLINICAL RELEVANCE Mechanical properties of novel removable dental prosthesis clasp materials devised to meet the growing esthetic demands of patients need to be investigated to ensure a successful long-term clinical application.
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Is the high-performance thermoplastic polyetheretherketone indicated as a clasp material for removable dental prostheses?
Clinical oral investigations, 2020Co-Authors: Danka Micovic, Felicitas Mayinger, Malgorzata Roos, Marlis Eichberger, Sebastian S. Bauer, Bogna StawarczykAbstract:To investigate the retention force of polyetheretherketone (PEEK) removable dental prosthesis clasps in comparison with a cobalt-chrome-molybdenum control group after storage in artificial saliva. Clasps were milled (Dentokeep (PEEKmilled1), NT digital implant technology; breCAM BioHPP Blank (PEEKmilled2), bredent), pressed (BioHPP Granulat for 2 press (PEEKpressed), bredent), or cast (remanium GM 800+ (cobalt-chrome-molybdenum), Dentaurum); N = 60, n = 15/subgroup. Retention force was examined 50 times/specimen in a pull-off test using the universal testing machine (Zwick 1445), where pull-off force was applied with a crosshead speed of 5 mm/minute until the maximum force dropped by 10%, at different aging levels: (1) initial, after storage in artificial saliva for (2) 90 and (3) 180 days. Statistical analysis was performed using one-way ANOVA followed by post hoc Scheffe-test and mixed models (p < 0.05). Cobalt-chrome-molybdenum presented the highest retention force. No differences were observed between polyetheretherketone materials. Cobalt-chrome-molybdenum showed a significant decrease of its values after artificial aging, while polyetheretherketone materials presented similar results over the course of aging. Regarding a repetitive insertion and removal, even though PEEKmilled2 and cobalt-chrome-molybdenum showed an initial increase, ultimately, a decrease in retention force was observed for all tested groups. Although the control group showed significantly higher results, the retention force of polyetheretherketone materials indicate a potential clinical application. Neither the manufacturing process nor artificial aging showed an impact on the retention force of polyetheretherketone clasps. Mechanical properties of novel removable dental prosthesis clasp materials devised to meet the growing esthetic demands of patients need to be investigated to ensure a successful long-term clinical application.
Moon-chan Kim - One of the best experts on this subject based on the ideXlab platform.
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Subsidence of polyetheretherketone cage after minimally invasive transforaminal lumbar interbody fusion.
Journal of Spinal Disorders & Techniques, 2013Co-Authors: Moon-chan Kim, Hung-tae Chung, Jae-lim Cho, Dong-jun Kim, Nam-su ChungAbstract:Study Design:A retrospective case series.Objective:The aim of this study was to determine the rate of cage subsidence after minimally invasive transforaminal lumbar interbody fusion (MITLIF) conducted using a polyetheretherketone (PEEK) cage, and to identify associated risk factors.Summary of Backgr
Fusheng Liang - One of the best experts on this subject based on the ideXlab platform.
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Comparison and Analysis on Mechanical Property and Machinability about Polyetheretherketone and Carbon-Fibers Reinforced Polyetheretherketone
Materials, 2015Co-Authors: Sun Changrui, Ji Zhao, Fusheng LiangAbstract:The aim of this paper is to compare the mechanical property and machinability of Polyetheretherketone (PEEK) and 30 wt% carbon-fibers reinforced Polyetheretherketone (PEEK CF 30). The method of nano-indentation is used to investigate the microscopic mechanical property. The evolution of load with displacement, Young's modulus curves and hardness curves are analyzed. The results illustrate that the load-displacement curves of PEEK present better uniformity, and the variation of Young's modulus and hardness of PEEK both change smaller at the experimental depth. The machinability between PEEK and PEEK CF 30 are also compared by the method of single-point diamond turning (SPDT), and the peak-to-valley value (PV) and surface roughness (Ra) are obtained to evaluate machinability of the materials after machining. The machining results show that PEEK has smaller PV and Ra, which means PEEK has superior machinability.
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Comparison of mechanical property and machinability for polyetheretherketone and glass fiber–reinforced polyetheretherketone:
Advances in Mechanical Engineering, 2015Co-Authors: Yu Huijuan, Ji Zhao, Fusheng LiangAbstract:To study and compare mechanical properties and machinability of the polyetheretherketone and the glass fiber–reinforced polyetheretherketone and analyze the relationship between the two properties, nano-indentation experiments and single-point diamond turning experiments were carried out in this article. Through nano-indentation experiments, several material characteristic parameters such as elastic modulus, hardness, and load–displacement data were obtained and load–displacement curve was drawn. It was found that the glass fiber–reinforced polyetheretherketone has higher elastic modulus and hardness but poor uniformity. By single-point diamond turning experiments, two circular planes whose materials are polyetheretherketone and glass fiber–reinforced polyetheretherketone, respectively, were machined. It was found that form accuracy (PV) and surface roughness (Ra) of the former were smaller than those of the later, and glass fiber–reinforced polyetheretherketone plane has poor machined quality. Mechanical...