title: [Is Hylamer a suitable substance for use in endoprosthetics?].
abstract: In the present study, original UHMWPF implants obtained from different manufacturers were evaluated using Differential Scanning Calorimetry (DSC), Infrared Spectroscopy and Wide Angle X-ray Scattering (WAXS). DSC measurements revealed clear differences in the crystallinity of the implants with figures varying between 58.2% and 73.2%. The highest level of crystallinity (73.2%) was found in the Hylamer material. The results of IR spectroscopy confirmed these findings WAXS investigations showed that Hylamer has both a orthorrhomboid and a monoclinic phase. Remelting was followed by a disappearance of the ortherhomboid phase.
  
  
  CONCLUSIONS
  The use of Hylamer that has been processed by secondary companies is not recommended. The product Hylamer makes clear how the original crystal structure of UHMWPE can be altered. The clearly increased crystallinity in Hylamer also increases the risk of implant failure due to brittleness.
authors.affiliation: Westfälische Wilhelms-Universität Münster, Klinik und Poliklinik für Allgemeine Orthopädie.
authors.forename: J
authors.initials: J
authors.lastname: Jerosch
authors.forename: S
authors.initials: S
authors.lastname: Fuchs
authors.forename: T
authors.initials: T
authors.lastname: Schmidt
authors.forename: S
authors.initials: S
authors.lastname: Haftka
mesh_terms: D003460:Crystallization; D006622:Hip Prosthesis; D006801:Humans; D008422:Materials Testing; D008970:Molecular Weight; D011095:Polyethylenes; D011475:Prosthesis Failure
chemical_list: D011095:Polyethylenes
vernacular_title: Ist Hylamer ein geeigneter Werkstoff für die Verwendung in der Endoprothetik?