Characterization of the effect of microfracture surgery and angle of incidence on the structural properties of femoral bone
Bibliographic record
Abstract
Microfracture surgery is one of the most common treatment options for knee osteoarthritis, a chronic inflammatory disease of the knee joint. However, a recent study by Theodoropoulos et al. (2012) has shown that there are significant variations in the angle of surgical awl used by surgeons in microfracture surgery as well as in the rehabiliation regimen prescribed following surgery. The purpose of this experiment was to characterize the structural properties of femoral bone before and after microfracture, with varying awl angles of impact. Microfracture at three different awl angles of impact, each between 0 and 30 degrees, was conducted on bone cubes cut from femoral condyles. Uniaxial compressive testing was conducted pre- and post- microfracture to determine changes in the stiffness of the bone. The results from this study show that there are significant decreases in the stiffness of femoral bone following microfracture surgery. However, different awl angles do not seem to result in significant decreases in bone stiffness. In addition, these results suggest that at the relatively low awl angles that were tested, differences in the angle of surgical awl used do not significantly affect the structural integrity of knee bone. Uniaxial testing appears a useful tool for characterizing the structural properties of bone, and further animal studies on the stiffness of bone at different timepoints following microfracture surgery could assist physicians in prescribing more suitable rehabilitation regimens. 
 
 Keywords: knee osteoarthritis; microfracture; biomechanical testing; femoral condyle; awl angle; bone stiffness
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| 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) | 0.000 | 0.000 |
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 teacher head, 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".