No reduced patellar loading with latest-generation cruciate-retaining total knee arthroplasty-a comparative study of Attune and Press-Fit Condylar®.

International Orthopaedics
Filippo-Franco SchiapparelliMichael T Hirschmann

Abstract

To investigate if the latest-generation cruciate-retaining total knee arthroplasty (CR-TKA) systems through more patella-friendly femoral trochlea reduce the patellar bone loading. Twenty patients who underwent Attune CR-TKA were matched with twenty-one patients who underwent Press-Fit Condylar® (PFC) CR-TKA. The patella was always preserved. The in vivo patellar loading was measured twice by two blinded observers and localised on an 8-quadrant grid on 1-year post-operatively SPECT/CT images. The position of the TKA components, patella height, thickness, tilt, and tibial tuberosity-trochlear groove index were measured in 3D CT. Knee function was assessed pre-operatively, at 12 and 24 months post-operatively with the knee society score (KSS). All data were compared between groups with the Mann-Whitney U test and within groups with Spearman's correlation. A significantly higher bone tracer uptake (BTU) was seen in the Attune group in the lateral non-articular patellar quadrants. No other significant differences of the BTU were seen. The post-operative KSS did not differ significantly. Spearman's correlation showed no correlations between the significantly higher BTU of the lateral non-articular patellar quadrants and the position...Continue Reading

References

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Jun 28, 2017·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Omer SlevinMichael T Hirschmann
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Citations

Jan 21, 2021·International Orthopaedics·Christian KonradsFelix Erne
Mar 5, 2021·Knee Surgery, Sports Traumatology, Arthroscopy : Official Journal of the ESSKA·Etienne DerocheSébastien Lustig

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