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Published on: May 5, 2023
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[The MyKnee® patient-specific system. Rationale, Technique and Results]
W Anderl1, L Pauzenberger2, E Schwameis2
1Abteilung für Orthopädie, Krankenhaus der Barmherzigen Schwestern Wien, Stumpergasse 13, 1060, Wien, Österreich. werner.anderl@bhs.at.
Der Orthopade
|March 31, 2016
Summary
Patient-specific instrumentation (PSI) improves accuracy in total knee arthroplasty for limb alignment and component positioning. Achieving neutral alignment leads to superior clinical outcomes compared to outliers.
Area of Science:
- Orthopedic Surgery
- Biomedical Engineering
- Medical Device Technology
Background:
- Accurate component positioning and limb alignment are critical in total knee arthroplasty (TKA).
- Patient-specific instrumentation (PSI) offers potential for enhanced accuracy in TKA.
- Existing literature on PSI's reliability for alignment and positioning shows mixed results.
Purpose of the Study:
- To explain the rationale for utilizing PSI in TKA.
- To demonstrate the surgical technique associated with PSI.
- To present outcomes using the MyKnee® PSI system.
Main Methods:
- Detailed illustration of PSI logistics and workflow for TKA.
- Comparison of clinical and radiological results between MyKnee® PSI and conventional instrumentation groups.
- Analysis of patient subgroups based on mechanical limb alignment.
Main Results:
- PSI significantly enhanced accuracy and reduced outliers in mechanical limb alignment and 3D component positioning versus conventional methods.
- Early clinical outcomes were similar between PSI and conventional groups.
- Patients achieving neutral mechanical alignment (within ±3°) showed superior clinical outcomes.
Conclusions:
- The MyKnee® PSI system reliably improves mechanical limb alignment and component positioning accuracy in TKA.
- While PSI enhances accuracy, proficient surgical technique remains paramount for successful TKA outcomes.
