The Effect of Posterior Tibial Slope on Implant Migration Following Total Knee Arthroplasty

Description

The presentation by Glen Richardson begins with an acknowledgment of his co-authors and a brief overview of the study focused on total knee arthroplasty (TKA). He highlights the significance of proper alignment in TKA but notes the prevailing debate regarding the optimal alignment for effective knee replacements. The research investigates the implications of coronal and sagittal alignment, particularly examining the effects of posterior tibial slope and posterior femoral condylar offset on the migration of tibial implants during a TKA procedure.



Richardson outlines the hypothesis that altering the posterior tibial slope or condylar offset could influence tibial component migration, with the goal of understanding how these adjustments play a role in post-operative outcomes. The study analyzes data from 91 patients over two years, employing RSA exams to measure implant movement and adjustments made during surgery. Results indicate a trend of undercorrection in posterior tibial slope, with minimal correlation found between the changes in slope/post-operative alignments and the migration of tibial implants.



The findings suggest that variations in posterior tibial slope or femoral condylar offset did not significantly impact the stability of the cemented tibial base plates within the evaluated ranges. The study is presented as having considerable implications for surgical practices related to knee replacements, emphasizing that while the ideal surgical resection strategy remains unclear, the incorporation of navigation technology may help improve implantation precision.

DOI: 10.1302/3114-220806

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