Functional Outcome and Quality of Life after Patient-Specific Instrumentation in Total Knee Arthroplasty

J Arthroplasty. 2015 Oct;30(10):1724-8. doi: 10.1016/j.arth.2015.04.007. Epub 2015 Apr 11.


Patient-specific instrumentation (PSI) surgery may represent the next advancement in total knee arthroplasty (TKA). In 2011, 60 patients were prospectively recruited and divided into two groups based on the patient's choice: (1) PSI surgery; and (2) conventional TKA. At two years after surgery, the Knee Society Function Score, Oxford Knee Score and SF-36 scores were comparable between the two groups. Although the Knee Society Knee Score (KSKS) was 9 ± 3 points better in the PSI group (P=0.008), the two years improvement in KSKS was comparable between the two groups. None of the patients required revision surgery. These findings cannot justify the additional costs and waiting time incurred by the patients with PSI surgery in the practice of a high volume surgeon.

Keywords: functional outcome; patient-specific instrumentation; quality of life; revision surgery; total knee arthroplasty.

Publication types

  • Clinical Trial

MeSH terms

  • Aged
  • Arthroplasty, Replacement, Knee / instrumentation*
  • Arthroplasty, Replacement, Knee / statistics & numerical data
  • Female
  • Humans
  • Knee Joint / surgery
  • Male
  • Middle Aged
  • Precision Medicine / instrumentation*
  • Precision Medicine / statistics & numerical data
  • Prospective Studies
  • Quality of Life*
  • Recovery of Function*