įor a medical device, which will be used in surgery, the steam sterilization process is mandatory to properly disinfect the device before its next use. However, it was reported that the yielding and plastic flow behavior of PEEK was affected at physiological temperatures. As all implants were subjected to body temperature, which is significantly below the glass transition temperature of PEEK, no significant change in elastic properties of PEEK was observed. Ī thermomechanical study performed on PEEK composite reported the changes in crystallinity, macroscopic decoloration, large deformation in impact, high strain rate, and heating-induced deformation. For implant applications, many PEEK composite materials have been developed, which have been studied for their behavior under mechanical impact, biotribology, friction, dynamic, damage, and fracture. (Thornton Cleveleys, United Kingdom) first offered PEEK commercially as a biomaterial for implant applications in 1998, and since then research on PEEK as a biomaterial has enhanced significantly. In the late 1990s, polyetheretherketone (PEEK) was initially developed as a high-performance thermoplastic to replace metal-based orthopedic and trauma implants. When an unsterilized sample was heated for repetitive cycles without the presence of moisture (121 ☌, 10 and 20 cycles), only ~7% of the maximum change in hardness was observed. Hardness measurement exhibited an increase of ~49% in hardness after just 20 cycles. DSC results exhibited no significant change in the degree of cure and melting behavior of PEEK before and after the sterilization. Vickers hardness and differential scanning calorimetry (DSC) techniques were used to characterize the effects of sterilization. No further significant change in the compression force or dimension was observed for the subsequent sterilization cycles. A significant decrease of ~20% in the compression force of the spring was observed after 30 cycles, and a ~6% decrease in the lateral dimension of the clip was observed after 50 cycles. This clip component was sterilized for a predetermined number of cycles (2, 4, 6, 8, 10, 20…100) at 121 ☌ for 30 min. A spring nature, clip component was selected out of a newly designed medical device (patented) to perform this reliability study. For a reusable medical device, material reliability is an important parameter to decide its lifetime, as it will be subjected to the continuous steam sterilization process. Live.The effects of the sterilization process have been studied on medical grade thermoplastic polyetheretherketone (PEEK). Live venues,” said Lee Zeidman, president of Arena, Peacock Theater and L.A. “We are looking forward to the opportunity to collaborate with Peacock to create new content and programming to complement our existing roster of amazing concerts, awards shows and special events we are known for at all of our iconic L.A. Also part of the plans are a branded content studio. Live, the sports and entertainment district. The deal includes adding a LED marquee at the corner of Figueroa Street and Olympic Boulevard featuring two video boards that will promote Peacock’s series and special events at adjacent L.A. The 40,000-square-foot plaza will change its name from XBOX Plaza. The 7,100-seat theater hosts concerts and special events, including the Emmy Awards. The deal announced Thursday is Peacock’s first naming rights agreement. The changes take effect July 11 as part of a multi-year naming rights deal between Peacock, NBCUniversal’s premium streaming service, and sports and live entertainment giant AEG. LOS ANGELES (AP) - Microsoft Theater in downtown Los Angeles is changing its name to Peacock Theater, and the open-air plaza next to it will be known as Peacock Place.
0 Comments
Leave a Reply. |