Comparison of Three Surgical Techniques to Achieve Patella Symmetry During Resection
Arthroplasty, Replacement, Knee, Injuries, Knee
About this trial
This is an interventional treatment trial for Arthroplasty, Replacement, Knee
Eligibility Criteria
Inclusion Criteria:
- Patients scheduled for primary total knee arthroplasty with planned patellar resection by one of the three staff surgeons included in the study.
- Patient must be able and willing to provide consent for study participation
Exclusion Criteria:
- Patient in need of revision total knee arthroplasty or having already undergone prior total knee arthroplasty
- Patient not in need of patellar resection during their primary total knee arthroplasty
- Unwilling or unable to provide consent for participation
Sites / Locations
- Mayo Clinic in Rochester
Arms of the Study
Arm 1
Arm 2
Arm 3
Active Comparator
Active Comparator
Active Comparator
Cutting Guide Technique
Haptic Feedback Technique
Four Quadrant Technique
The guide is clamped onto the patella and tightened so that it remains stable. The guide has a slot that allows insertion of a standard sagittal saw blade, and this slot guides the blade as it is advanced across the patella. The thickness is then measured in the center of the patella to ensure that the resection goal is achieved. Additional resection may be performed as needed.
It consists of a free hand cut (no guide used) with a standard sagittal saw that is oriented based on osteo-cartilaginous landmarks and haptic palpation of the patella by the surgeon. The resection thickness/obliquity can be altered based on haptic feedback (use of the sense of touch) of the patella. The thickness is then measured in the center of the patella to ensure that the resection goal is achieved. Additional resection may be performed as needed.
Resection is performed in a free handed fashion, but after resection, the thickness of the patella is measured separately in all four quadrants (superolateral, superomedial, inferomedial, and inferolateral). Additional resection is performed as needed based on the quadrant measurements and the measurements are repeated after each resection until satisfactory resection thickness and symmetry are obtained.