A patient-specific model of total knee arthroplasty to estimate patellar strain: A case study.

Détails

ID Serval
serval:BIB_7238C8EBEA0C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
A patient-specific model of total knee arthroplasty to estimate patellar strain: A case study.
Périodique
Clinical biomechanics (Bristol, Avon)
Auteur(s)
Latypova A., Arami A., Becce F., Jolles-Haeberli B., Aminian K., Pioletti D.P., Terrier A.
ISSN
1879-1271 (Electronic)
ISSN-L
0268-0033
Statut éditorial
Publié
Date de publication
02/2016
Peer-reviewed
Oui
Volume
32
Pages
212-219
Langue
anglais
Notes
Publication types: Case Reports ; Journal Article ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Résumé
Inappropriate patellar cut during total knee arthroplasty can lead to patellar complications due to increased bone strain. In this study, we evaluated patellar bone strain of a patient who had a deeper patellar cut than the recommended.
A patient-specific model based on patient preoperative data was created. The model was decoupled into two levels: knee and patella. The knee model predicted kinematics and forces on the patella during squat movement. The patella model used these values to predict bone strain after total knee arthroplasty. Mechanical properties of the patellar bone were identified with micro-finite element modeling testing of cadaveric samples. The model was validated with a robotic knee simulator and postoperative X-rays. For this patient, we compared the deeper patellar cut depth to the recommended one, and evaluated patellar bone volume with octahedral shear strain above 1%.
Model predictions were consistent with experimental measurements of the robotic knee simulator and postoperative X-rays. Compared to the recommended cut, the deeper cut increased the critical strain bone volume, but by less than 3% of total patellar volume.
We thus conclude that the predicted increase in patellar strain should be within an acceptable range, since this patient had no complaints 8 months after surgery. This validated patient-specific model will later be used to address other questions on groups of patients, to eventually improve surgical planning and outcome of total knee arthroplasty.

Mots-clé
Aged, Arthroplasty, Replacement, Knee, Biomechanical Phenomena, Female, Humans, Knee Joint/physiopathology, Knee Joint/surgery, Models, Biological, Models, Theoretical, Patella/physiopathology, Patella/surgery, Stress, Physiological/physiology
Pubmed
Création de la notice
18/01/2016 11:10
Dernière modification de la notice
20/08/2019 14:30
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