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Ansley E. Swann, Rachel R. Kleis, and Johanna M. Hoch

also experience depression and anxiety. 2 Once conservative treatments for OA have failed, a total joint replacement surgery, or arthroplasty, is often warranted. 3 Total joint arthroplasty frequently leads to improvement in overall health; however, poor psychological outcomes such as depression and

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Lucas C. Bianco

Osteoarthritis (OA) is the most common cause of disability, affecting 32.5 million adults in the United States. 1 , 2 Pain related to OA is a major factor in the completion of a total knee arthroplasty (TKA). 2 , 3 When it is determined to be necessary, the TKA surgery can provide improvements in

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Emmanuel Frimpong, Joanne A. McVeigh, and Rebecca M. Meiring

( Ostir et al., 2006 ; Salaffi, Carotti, & Grassi, 2005 ). The most cost-effective treatment for advanced knee OA is total knee arthroplasty (TKA) ( Kim et al., 2011 ; Schache, McClelland, & Webster, 2014 ). TKA is considered as a treatment option after all conservative treatment measures have been

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Roger J. Paxton, Jeri E. Forster, Matthew J. Miller, Kristine L. Gerron, Jennifer E. Stevens-Lapsley, and Cory L. Christiansen

Knee osteoarthritis (OA) is the most common cause of chronic disability in the United States ( Dillon, Rasch, Gu, & Hirsch, 2006 ). To alleviate OA-related knee pain, more than 700,000 total knee arthroplasties (TKAs) are performed annually ( Kurtz, Ong, Lau, Mowat, & Halpern, 2007 ), with more

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Tsuyoshi Saida, Masayuki Kawada, Daijiro Kuroki, Yuki Nakai, Takasuke Miyazaki, Ryoji Kiyama, and Yasuhiro Tsuneyoshi

function and relates to gait performance; thus, it may be a suitable tool to use for evaluating gait function in patients with knee OA ( Barden, Clermont, Kobsar, & Beauchet, 2016 ). Many patients with knee OA undergo total knee arthroplasty (TKA) to regain lower-extremity function. Improved knee function

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Lisa Jasper, Lauren A. Beaupre, John C. Spence, and C. Allyson Jones

recommended physical activity guidelines ( Wallis, Webster, Levinger, & Taylor, 2013 ). Although total knee arthroplasty (TKA) is often a successful intervention resulting in pain relief and improved health-related quality of life, clarity is lacking as to whether physical activity levels also increase

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Elaine Trudelle-Jackson, Emerenciana Hines, Ann Medley, and Mary Thompson

Osteoarthritis of the knee is a frequent cause of mobility disability commonly treated with total knee arthroplasty (TKA) to alleviate symptoms. 1 The number of TKA surgeries performed in the United States is predicted to rise to 3.48 million per year by 2030. 2 Although TKA is considered as a

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Jereme B. Outerleys, Michael J. Dunbar, Glen Richardson, Cheryl L. Hubley-Kozey, and Janie L. Astephen Wilson

Total knee arthroplasty (TKA) remains the current standard of care for management of end-stage knee osteoarthritis (OA). TKA is considered highly successful in terms of self-report pain and function, and contemporary implants are associated with a survivorship of 20 years or more. 1 , 2 The

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Sara Birch, Torben Bæk Hansen, Maiken Stilling, and Inger Mechlenburg

The majority of patients having a total knee arthroplasty (TKA) report large pain reduction and improvements in physical function and quality of life after TKA, but around 20% of the patients report persistent pain up to 6 months after the operation ( Beswick et al., 2012 ). Different causes for

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Susanne Fuchs, Guido Schuette, Hartmut Witte,, and Carsten Oliver Tibesku

A new design of total knee prosthesis without anterior patellar flange was developed to preserve the anatomical shape of the patellofemoral joint. The aim of the current study was to experimentally compare patellofemoral contact area and pressure in a nonreplaced knee, in a knee after implantation of a conventionally designed total knee arthroplasty, and in a knee after implantation of the newly designed total knee arthroplasty without patellar flange. Six cadaveric legs were examined before and after implantation of either a conventional or a newly developed total knee arthroplasty, both without patellar replacement. The essential change in design is the absence of an anterior patellar flange. Contact area and pressure were measured using pressure sensitive films in 45°, 60°, 90°, and 120° of flexion and the results were compared between the different prosthesis designs and with the nonreplaced knee. The prosthesis without patellar flange showed less average and maximum pressure than the conventional prosthesis. Compared with the nonreplaced knee, the conventional prosthesis led to increased average and maximum pressure and decreased contact area. In an experimental test setup, the newly developed total knee arthroplasty without patellar flange showed reduced patello-femoral contact pressure in comparison with a total knee prosthesis with conventional patellofemoral design. This could possibly lead to a lower incidence of anterior knee complaints in patients.