Notice bibliographique
Résumé
According to the Canadian Joint Replacement Registry, in 2010–2011 there were 17,303 hip replacements performed in Canada of which 10% were revisions. More than 73% of these revisions were for aseptic loosening, wear, and instability which suggests that hip biomechanics may be anomalous. The hip joint is often described as a ball-and-socket joint, which implies congruent interacting bony joint surfaces and purely rotational relative motion. This study challenges the accepted kinematic description by analysing detailed motion of the hip joint using surgical navigation technology. An in-vitro study was conducted using twelve fresh frozen cadaveric human hemi-pelvises in three soft-tissue states. Three dimensional digital models of each specimen were generated from segmentation of computed tomography images. Local coordinate reference devices, mounted on the proximal femur and anterior-superior iliac spine, were registered and tracked with an active optical localisation system. Positions and orientations were imported to custom virtual surgery software. The study used soft-tissue states as one variable and twelve combinations of flexion/extension, abduction/adduction and internal/external rotation as the other variable. The entire series of motions were repeated for (I) soft tissues intact, (II) capsule intact and (III) completely disarticulated joint. Translation of the femoral head with respect to the acetabular cup at each frame was extracted from the recorded data. An Analysis of Variance (ANOVA) was used to determine whether the means of translations in each dissection states were significantly different. Translatory motion was observed in all specimens. Significant differences were found between magnitudes of translation in distinct soft tissue states (p The highly accurate surgical navigation system detected subtle translatory behaviour in hip motion. The data provided evidence that the femoral head translates with respect to the acetabular cup with or without any contact between the two bones; such impingements were previously thought to be the main reason for femoral excursion. The statistical significance found between translations exhibited at different soft tissue states indirectly supports an aspherical model of the adult hip, with kinematics driven by both soft tissue and the anatomy. This work towards an improved biomechanical model of the hip could help guide both surgical intervention and implant design, leading to improved outcomes for the hundreds of thousands of hip surgeries performed globally each year.
Récupéré en direct depuis OpenAlex et désinversé. Les résumés ne sont pas conservés dans cette base de données : les index inversés représentent 8,6 Go des 9,3 Go de texte de la base, et le serveur dispose de 13 Go libres.
Comment cette classification a été obtenuedéplier
Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,002 | 0,001 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,001 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découleClassification
machine, non validéePrédiction automatique; un appel candidat d’une seule tête enseignante, pas un consensus.
Le détail, modèle par modèle et score par score, se trouve en fin de page sous « Comment cette classification a été obtenue ».