A new articulated distraction arthroplasty device for treatment of the osteoarthritic knee joint: a preliminary report

Arthroscopy. 2007 Aug;23(8):833-8. doi: 10.1016/j.arthro.2007.02.014.


Purpose: The aim of this study was to evaluate the clinical results of a new distraction arthroplasty device when used in conjunction with a bone marrow-stimulating technique for the treatment of osteoarthritis of the knee.

Methods: We developed a new distraction arthroplasty device that allows continuous joint movement. We compared preoperative and postoperative findings for 6 knees (6 patients; age range, 42 to 58 years). The fixation period for the distraction device ranged from 7 to 13 weeks, and the follow-up period ranged from 1 to 3.5 years.

Results: The Japanese Orthopaedic Association knee score, range of motion, and joint space values were significantly improved in all cases at the latest follow-up (P < .05). Scores on a visual analog pain scale were also significantly improved (P < .05).

Conclusions: We conclude that treatment using this new arthroplasty device in combination with a bone marrow-stimulating method was effective for osteoarthritic knees in middle-aged patients.

Level of evidence: Level IV, therapeutic case series.

Publication types

  • Clinical Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Arthroplasty / instrumentation*
  • Bone Marrow / physiopathology
  • Device Removal
  • Equipment Design
  • Exercise
  • Female
  • Follow-Up Studies
  • Humans
  • Intraoperative Period
  • Male
  • Middle Aged
  • Osteoarthritis, Knee / physiopathology
  • Osteoarthritis, Knee / rehabilitation
  • Osteoarthritis, Knee / surgery*
  • Physical Stimulation
  • Treatment Outcome