The effect of hemiarthroplasty implant modulus on contact mechanics: an experimental investigation

Berkmortel, Carolyn; Szmit, Jakub; Langohr, G. Daniel G.; King, Graham J.W.; Johnson, James A.

doi:10.1016/j.jse.2021.06.009

Cited by 3 publications

(4 citation statements)

References 34 publications

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“…Significant improvements to minimize peak contact stresses were reported. Beyond shape optimization, the use of lower stiffness materials was also attempted to improve hemiarthroplasty contact mechanics 12 . Therefore, the optimization in both morphology and materials could enable EHA to be a clinically reliable treatment for complex fractures of the distal humerus.…”

Section: Discussionmentioning

confidence: 99%

“… 1 The main factor restricting the application of EHA is thought to be the inability of current prosthesis of EHA to replicate the native joint mechanics. 10 , 11 , 12 …”

Section: Introductionmentioning

confidence: 99%

“…However, total elbow arthroplasty (TEA) is considered a more recommended treatment option, 6–8 even though TEA has a high rate of complications, including aseptic loosening and periprosthetic fracture, 9 and could lead to lifelong limitations on weight‐bearing activities, which means that the utility of this procedure is only recommended for older patients with sedentary lifestyles 1 . The main factor restricting the application of EHA is thought to be the inability of current prosthesis of EHA to replicate the native joint mechanics 10–12 …”

Section: Introductionmentioning

confidence: 99%

“…1 The main factor restricting the application of EHA is thought to be the inability of current prosthesis of EHA to replicate the native joint mechanics. [10][11][12] The most common complication of EHA is reported to be cartilage wear on the proximal ulna and radius. 2 The geometry of current prostheses deviates from the naive anatomy of distal humerus articulation.…”

Section: Introductionmentioning

confidence: 99%

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Distal Humerus Morphological Analysis of Chinese Individuals: A Statistical Shape Modeling Approach

Wang

Guo

et al. 2022

Orthopaedic Surgery

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Objective: A detailed analysis of the morphology of distal humeral articulation can help in the creation of anatomic prostheses of hemiarthroplasty. This study used statistical shape modeling to evaluate the 3D morphology of the distal humerus in healthy Chinese individuals and to investigate the proper articular morphology differences.Methods: A statistical shape model (SSM) of the distal humerus was created using CT scans of 106 survey-confirmed nonpathologic elbows. In addition, the articular components of each principal component (PC) were selected and fitted on the mean mode. The Euclidean point-to-mesh distance of articular modes was calculated as a measurement the proper change in the morphology of the articulation. Results:The first seven PCs jointly accounted for 80.9% of the total variation (44.4%, 12.2%, 7.9%, 5.9%, 4.1%, 3.4% and 3%, respectively). In the mean model, the distance between the medial and lateral epicondyles was 57.4 mm, the width of the articulation was 42.1 mm, and the angle of the transepicondylar line (TEL) and C line was 4.8 . The articular surface differences of the first PC were significant (RMS: 1.43 mm in the À3 SD model and 2.38 mm in the +3 SD model), whereas under other conditions, the differences were not remarkable despite the maximum deformation not exceeding 1 mm. Conclusion:A novel method (SSM) was used to evaluate the 3D morphology of the distal humerus in healthy Chinese individuals and investigate the proper articular shape differences. We found the proper shape of articular surface basically transformed into one variation pattern which was relevant to the bone size, even though the morphology of distal humerus possessed complicated variation modes. The findings of this study can be helpful to design the next generation of elbow hemiarthroplasty in the future.

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Section: Discussionmentioning

confidence: 99%

“… 1 The main factor restricting the application of EHA is thought to be the inability of current prosthesis of EHA to replicate the native joint mechanics. 10 , 11 , 12 …”

Section: Introductionmentioning

confidence: 99%