ArticleArchives of orthopaedic and trauma surgery2024
Anterior femoral offset is a flawed measurement of patellofemoral overstuffing.
Article in Archives of orthopaedic and trauma surgery, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
backgroundPatellofemoral joint (PFJ) issues after total knee arthroplasty (TKA) are becoming a topic of interest once again. Due to the complex three-dimensional shape of the trochlea, various two-dimensional proxy measurements on plain X-rays have been described. One of these measurements is the anterior femoral offset (AFO). It is the distance between the anterior femoral cortex and the trochlea's most anterior point (MAP) on a true lateral X-ray after TKA. Because the relationship between the trochlea's MAP and its groove, which is the primary joint surface articulating with the patella, is unknown, the purpose of this study was to measure the distance between the MAP and the trochlear groove.
methodsAfter femoral component implantation, the surgeon identified the trochlea's MAP and the trochlear groove in ten consecutive TKAs and measured their distance. Measurements were performed with a ruler on a true lateral photograph and with a radiographic marker on a lateral radiograph in four different knee flexion angles, according to a previously published protocol.
resultsThe trochlear groove had a mean distance from the MAP between 2.09 ± 0.15 and 5.50 ± 0.17 mm, depending on the position. In no case is the trochlear groove visible on a true lateral view.
conclusionOn a true lateral X-ray, the trochlea's MAP omits the trochlear groove. Because the patella primarily articulates with the trochlear groove and because the relationship between the MAP and the trochlear groove is variable depending on the knee flexion angle, any conclusions regarding overstuffing based on a postoperative lateral knee X-ray are flawed.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.