title: [Total knee arthroplasty in 2014 : Results, expectations, and complications].
abstract: BACKGROUND
  Aseptic loosening seems to have become a minor problem in total knee arthroplasty. In contrast to that, new challenges are defined by changing patients' expectations. Beside reduction of pain and improving mobility, modern implants should not be noticed as such and should not limit sports activities.
  
  
  OBJECTIVE
  In this paper, a summary of the development and the current situation of total knee arthroplasty (e.g., implantation numbers, hospitality, operation time, and infection rates) are provided. The data are compared in an international context. In addition, current trends and developments from recent years are shown and rated according to the literature.
  
  
  METHODS
  The paper is based on a literature search (PubMed) and analyses of published official statistical data and expert recommendations.
  
  
  RESULTS
  Implantation numbers have been declining gradually in Germany since 2009. In 2013, 127,077 total knee arthroplasties were implanted. In contrast, the number of revision operations has increased gradually during the last decade. In addition, hospital stay and operation time have declined.
  
  
  CONCLUSIONS
  The development of implants, instruments, and operation techniques results from changing patients' expectations. All innovations must be compared against the results of well-proven techniques. The arthroplasty register may be an instrument to evaluate the results of new techniques and implants in a broad clinical application in terms of survival.
authors: Orthopädische Klinik, Friedrich-Schiller Universität Jena, Campus Eisenberg, Klosterlausnitzer Straße 81, 07607, Eisenberg, Deutschland, g.matziolis@krankenhaus-eisenberg.de.
authors: G
authors: G
authors: Matziolis
authors: E
authors: E
authors: Röhner
mesh_terms: D000328:Adult; D017677:Age Distribution; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000706:statistics & numerical data*; D005260:Female; D005858:Germany / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D007902:Length of Stay / Q000706:statistics & numerical data*; D008297:Male; D008875:Middle Aged; D061646:Operative Time; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D011475:Prosthesis Failure; D016459:Prosthesis-Related Infections / Q000453:epidemiology* / Q000517:prevention & control; D012042:Registries; D012086:Reoperation / Q000706:statistics & numerical data; D018570:Risk Assessment; D017678:Sex Distribution; D016896:Treatment Outcome