Bibliographic record
Abstract
McKeever first reported on the use of a patellar prosthesis in 1955. Blazina first reported on patellofemoral replacement in 1979. The success rate of the procedure ranges from 70% to 94% depending on the author. We are reporting a retrospective study of 38 knees treated with patellofemoral arthroplasty between 1980 and 1997. Patients were assessed by questionnaire and clinical examination. Objective measures using the knee society score, the Hungerford-Kenna score and WOMAC score were performed. Radiological examination, as well as a survivorship analysis were performed. The average age at operation was 58 years with an average follow up of 9 years. Surgery was performed for isolated patellofemoral osteoarthritis. Seventy one percent of patients were classed as successful. The best results scored in patients with patellofemoral dysplasia. Failures resulted from mal-alignment, resulting in instability and progression of femoral-tibial osteoarthritis. Careful selection of patients is essential and the femoral-tibial arthritis is a relative contra-indication.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.060 | 0.017 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".