Abstract
Reduced posterior tibial slope (PTS) and posterior tibiofemoral translation (PTFT) in posterior cruciate-retaining (PCR) total knee arthroplasty (TKA) may result in suboptimal flexion. We evaluated the relationship between PTS, PTFT, and total knee flexion after PCR TKA in a cadaveric model. We performed a balanced PCR TKA using 9 transfemoral cadaver specimens and changed postoperative PTS in 1° increments. We measured maximal flexion and relative PTFT at maximal flexion. We determined significant changes in flexion and PTFT as a function of PTS. Findings showed an average increase in flexion of 2.3° and average PTFT increase of 1. mm per degree of PTS increase when increasing PTS from 1° to 4° (P<.05). Small initial increases in PTS appear to significantly increase knee flexion and PTFT.
Original language | English |
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Pages (from-to) | 103-106 |
Number of pages | 4 |
Journal | Journal of Arthroplasty |
Volume | 31 |
Issue number | 1 |
DOIs | |
State | Published - 1 Jan 2016 |
Keywords
- Maximum flexion
- Posterior tibial slope
- Posterior tibial translation
- Primary knee arthroplasty
- Tibiofemoral translation
- Total knee replacement