Patellar bone strain after total knee arthroplasty is correlated with bone mineral density and body mass index.

Latypova, Adeliya; Taghizadeh, Elham; Becce, Fabio; Büchler, Philippe; Jolles, Brigitte M; Pioletti, Dominique P; Terrier, Alexandre (2019). Patellar bone strain after total knee arthroplasty is correlated with bone mineral density and body mass index. Medical engineering & physics, 68, pp. 17-24. Elsevier 10.1016/j.medengphy.2019.03.017

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Patella-related complications after total knee arthroplasty (TKA) remain a major clinical concern. Previous studies have suggested that increased postoperative patellar bone strain could be related to such complications, but there is limited knowledge on patellar strain after TKA. The objective of this study was to predict patellar bone strain after TKA and evaluate correlations with various preoperative data. Fourteen TKA patients with a minimum follow-up of one year were included in this study. Using preoperative CT datasets, preoperative planning, and postoperative X-rays, a method is presented to generate patient-specific finite element models after virtual TKA. Patellar kinematics and forces were predicted during a squat movement, and patellar bone strain was evaluated at 60° of knee flexion. Strain varied greatly among patients, but was strongly negatively correlated (r = -0.85, p < 0.001) with bone mineral density (BMD) and moderately positively (r  = 0.54, p  =  0.05) with body mass index (BMI). The BMI/BMD ratio explained 87% of strain, and should be further investigated as a potential risk factor for clinical complications. This study represents a preliminary step towards the identification of patients at risk of patellar complications after TKA.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research > ARTORG Center - Musculoskeletal Biomechanics
10 Strategic Research Centers > ARTORG Center for Biomedical Engineering Research

Graduate School:

Graduate School for Cellular and Biomedical Sciences (GCB)

UniBE Contributor:

Taghizadeh, Elham and Büchler, Philippe

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 610 Medicine & health
600 Technology > 620 Engineering

ISSN:

1350-4533

Publisher:

Elsevier

Language:

English

Submitter:

Philippe Büchler

Date Deposited:

17 Dec 2019 15:36

Last Modified:

17 Dec 2019 15:43

Publisher DOI:

10.1016/j.medengphy.2019.03.017

PubMed ID:

30979584

Uncontrolled Keywords:

Arthroplasty Finite elements Knee Patella Patient-specific

BORIS DOI:

10.7892/boris.135571

URI:

https://boris.unibe.ch/id/eprint/135571

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