Patent on Mosaicplasty Implants Issued to CPG Researchers
US Patent 9,289,302 was issued on March 22, 2016 to CPG researchers. The patent describes designs and methods for making implants for focal cartilage tears in load bearing implants, such as hips and knees. The construct designs make use of a surgical procedure termed mosaicplasty, whereby a plug of healthy osteochondral plug is removed from […]
Notch Fatigue in UHMWPE
CPG researcher Adam Kozak co-authored a Journal of Mechanical Behavior of Biomedical Materials article. Along with co-authors from UC-Berkeley (Ansari, Gludovatz, Ritchie, and Pruitt), these researchers investigated the sensitivity of ultra high molecular weight polyethylene (UHMWPE) to fatigue when stress concentration sites are present in the form of notches. The authors investigated 3 formulations of […]
The Rheology of Hyaluronic Acid Used to Treat Osteoarthritis
Recently researchers at Cambridge Polymer Group in collaboration with OrthogenRx coauthored a paper on biosimilar medical devices and methods for supporting performance similarities in specifically viscosupplementation. In this paper, we compare an existing material cleared for sale in the US, against an ex-US device intended to replicate the performance of the existing material as a […]
CPG Acquires Herzan AVI-400 for SEM
Over two years ago, CPG purchased a Zeiss EVO LS15 environmental scanning electron microscope. This instrument has become a work-horse for root-cause analysis, surface topographies and (through the attached Oxford EDS) elemental mapping. With the large chamber and capability to run in “wet mode” (hydrated at elevated pressures) it has also proved invaluable at imaging […]
3rd Edition of UHMWPE Biomaterials Handbook
This edition contains the history of ultra high molecular weight polyethylene and its use in hip and knee arthroplasty. The new edition contains multiple chapters addressing analytical testing techniques to characterize UHMWPE, wear testing, accelerated aging, antioxidant effects, and advances in UHMWPE processing and formulation development. CPG researchers Braithwaite, Kozak, and Spiegelberg contributed a chapter […]
Fatigue Crack Propagation Testing in UHMWPE
This poster presentation discusses the comparison of fatigue crack propagation testing per ASTM E647 using a new optical system developed at Cambridge Polymer Group to monitor crack growth in an automated manner. The presentation shows results from two laboratories using the system. Presented at the 7th semi-annual UHMWPE Conference on October 22, 2015 in Philadelphia, […]
Medical Grade Polymers 2015
Dr. Yuri Svirkin, CPG Research Scientist, and Mr. Adam Kozak, CPG Research Scientist, presented “Novel Material Development for Medical Devices.”
MIT Celebrates Polymer Day
On March 11, MIT’s Program in Polymers and Soft Matter hosted their 5th Annual Polymer Day. A poster session was held in the morning, and two CPG scientists, Dr. Yuri Svirkin and Adam Kozak, acted as judges and awarded prizes to the top posters. Cambridge Polymer Group received an appreciation award for three years as […]