Design and Development of a Simplified Wear Simulator for Total Knee Replacement (TKR) Based on Pin-Disc Machine

Properties and Characterization of Modern Materials - Advanced Structured Materials ◽

10.1007/978-981-10-1602-8_25 ◽

2016 ◽

pp. 309-314

Author(s):

R. Rodríguez-Martínez ◽

G. Urriolagoitia-Sosa ◽

C. Torres San Miguel ◽

L. H. Hernández-Gómez ◽

J. A. Beltrán-Fernández ◽

...

Keyword(s):

Total Knee Replacement ◽

Knee Replacement ◽

Design And Development ◽

Total Knee ◽

Wear Simulator

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Total Articular Knee Replacement Using Polyurethane

The Journal of Knee Surgery ◽

10.1055/s-0039-1677816 ◽

2019 ◽

Vol 33 (03) ◽

pp. 242-246

Author(s):

James W. Pritchett

Keyword(s):

Total Knee Replacement ◽

Knee Replacement ◽

Articular Surface ◽

Long Term Results ◽

Material Loss ◽

Alternative Material ◽

Tibial Insert ◽

Total Knee ◽

Wear Simulator

AbstractThis study reviewed the early use of polyurethane for total knee resurfacing, the long-term results of polycarbonate urethane (PCU) for total knee replacement and conducted wear simulator testing of PCU. In 1959 and 1960, 10 patients underwent total articular polyurethane knee replacement (polyethylene was not available). The polyurethane was placed on the articular surface of the femur with metal surfaces on the tibia and patella. In 1996 and 1997, four patients received a newer PCU tibial insert in revision procedures; all had well-fixed prostheses, but no revision polyethylene implants were available. In addition, this study evaluated six new PCU tibial inserts in a 10-million cycle (Mc) wear simulator. All 10 of the early knees performed well clinically and 2 knees were functional for more than 30 years. Of the four more recent patients, all knees remain functional at more than 20 years' follow-up with no signs of wear or osteolysis. Wear simulator testing found mean material loss of 14.2 mg/Mc which equates to a volumetric wear of 11.9 mg/Mc, similar to the wear of conventional polyethylene. Polyurethane performs well as conventional polyethylene but not better than current cross-linked polyethylene tibial inserts. Its large wear particles (mean, 11 µm) and biocompatibility are less likely to cause an inflammatory response leading to pain and bone loss. Newer, superior polyurethanes can again be considered a candidate material for the tibial insert of a total knee replacement. A larger study may be able to validate polyurethane as an alternative material for joint replacement.

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Development of an individualized asynchronous sensor-based telerehabilitation program for patients undergoing total knee replacement: Participatory design

Health Informatics Journal ◽

10.1177/1460458220909779 ◽

2020 ◽

Vol 26 (4) ◽

pp. 2492-2511 ◽

Cited By ~ 1

Author(s):

MReza Naeemabadi ◽

Jesper Hessellund Søndergaard ◽

Anita Klastrup ◽

Anne Philbert Schlünsen ◽

Rikke Emilie Kildahl Lauritsen ◽

...

Keyword(s):

Total Knee Replacement ◽

Knee Replacement ◽

Participatory Design ◽

Relevant Information ◽

Rehabilitation Program ◽

Design Development ◽

Design And Development ◽

User Friendliness ◽

Total Knee ◽

High Level

Telerehabilitation programs can be employed to establish communication between patients and healthcare professionals and empower patients performing their training remotely. This study aimed to identify patients’ requirements after a total knee replacement following a self-training rehabilitation program, leading to the design and development of a telerehabilitation program that can meet the stakeholders’ actual needs. System design, development, and testing were conducted in five iterations based on a participatory design approach. Data collection was performed using interviews, observations, prototyping, and questionnaires. It was found that the main barriers facing the existing rehabilitation program were a lack of clear communication, lack of relevant information, and healthcare professional’s feedback. The participants emphasized the main themes of communication, information, training, and motivation in the process of design and development. In using the telerehabilitation program, the patients reported a high level of user-friendliness, flexibility, and a sense of security. This study has identified obstacles in the current rehabilitation program and revealed the potential effectiveness of using asynchronous communication and sensor-based technologies by employing participatory design and development. A higher level of portability and flexibility were observed. However, future studies and development are required to investigate the overall usability and reliability of the telerehabilitation program.

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