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A recent paper by Andreas Imhoff comparing the inlay Arthrosurface Wave to the onlay Smith & Nephew Journey implant shows a reduction in OA progression with the inlayed Wave design.  The authors suggest that this may be due to the more anatomic nature of the implant better reproducing the kinematics of the joint.

The paper, titled ‘A matched pair comparison of inlay and onlay trochlear designs for patellofemoral arthroplasty: No differences in clinical outcome but less progression of osteoarthritis with inlay designs’ stated that ” Progression of tibiofemoral OA is the most common reason for the failure of PFA using modern prosthetic designs. An interesting finding of the present study was that none of the patients with an inlay component showed progression of tibiofemoral OsteoArthritis, whereas more than half of the patients in the onlay group demonstrated progression of medial and/or lateral tibiofemoral OA. The true reason for this observation remains unknown; however, one hypothesis is that the more anatomic approach of the inlay design better reproduces the complex kinematics of the patellofemoral joint.”

The Arthrosurface Wave offers the following benefits:

  • Intraoperative mapping to match the native curvature of the patients joint surface
  • Preserves revision options by removing only 3mm of bone
  • Guided instrumentation defines correct placement
  • Excellent option for dysplastic trochlea

If you would like to find out more about the Arthrosurface Wave please contact the Joint Operations team: service@jointoperations.co.uk


To read the full paper click here Joint Operations Knee Algorithm Chart