Joint Loading & Musculoskeletal Analysis
The loads acting in joint prostheses and other orthopaedic implants is still partially unknown. The acting loads are required for different purposes.
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Knee joint replacement
Despite the unquestionable improvements and the success of total knee arthroplasty (TKA) over the last decades, a substantial number of patients remain unsatisfied with the outcome. Over 20% of patients report persisting knee pain without distinct radiological evidence or clinical rationale. It remains under debate if altered physiological knee kinematics developed after TKA are specifically responsible for this dissatisfaction. Additionally, the patients’ desire to return to activities of daily living and participation in sports make TKA implant optimization necessary. By using analyzes and models, we want to help enabling patients to live a normal life.
In order to provide valuable information to surgeons and implant manufacturers about the postoperative performance of TKA implants, single plane fluoroscopy analysis is conducted during unloaded and loaded knee flexion activities. This technique accurately quantifies 3D knee joint kinematics and allows clear insight into the behavior of the analyzed implant. Gait analysis is also conducted to give an overview of the knee joint kinematics during daily activities (compare ‘Functional Adaptation’).
Moreover, the information collected from this analysis, when combined with specific in vivo load data and geometrical characteristics can be used as inputs for finite element (FE) analysis. This multi-pronged analysis allows for in-depth assessments of implant performance before implementation in the market.
1: fluoroskopische Labormessung (Moewis et al.) 2: fluoroskopische Darstellung eines Knieimplantates (Moewis et al.) 3: kinematische Analyse nach Knietotalendoprothese (Moewis et al.)
- Authors:Moewis PH, Duda GN, Trepczynski A, Krahl L, Boese CHK, Hommel H
Journal:J Bone Joint Surg Am Year:2020;
Title:Retention of Posterior Cruciate Ligament Alone May Not Achieve Physiological Knee Joint Kinematics After Total Knee Arthroplasty: A Retrospective Study
- Authors:Moewis P, Hommel H, Trepczynski A, Krahl L, von Roth P, Duda GNJournal:Sci Rep Year:2019; Volume:9Issue:(1):Pages:9148.
- Authors:Trepczynski A, Kutzner I, Schutz P, Dymke J, List R, von Roth P, Moewis P, Bergmann G, Taylor WR, Duda GN
Journal:Sci Rep Year:2019; Volume:9Issue:(1):Pages:182.
Title:Tibio-Femoral Contact Force Distribution is Not the Only Factor Governing Pivot Location after Total Knee Arthroplasty
- Authors:Moewis P, Checa S, Kutzner I, Hommel H, Duda GN
Journal:PLoS One Year:2018; Volume:13Issue:(2):Pages:e0192225.
Title:Physiological joint line total knee arthroplasty designs are especially sensitive to rotational placement - A finite element analysis
- Authors:Pfitzner T, Moewis P, Stein P, Boeth H, Trepczynski A, von Roth P, Duda GN
Journal:Knee Surg Sports Traumatol Arthrosc Year:2018; Volume:26Issue:(6):Pages:1645-1655.
Title:Modifications of femoral component design in multi-radius total knee arthroplasty lead to higher lateral posterior femoro-tibial translation
- Authors:Moewis P, Duda GN, Jung T, Heller MO, Boeth H, Kaptein B, Taylor WR
Journal:PLoS One Year:2016; Volume:11Issue:(7):Pages:e0159600.
Title:The Restoration of Passive Rotational Tibio-Femoral Laxity after Anterior Cruciate Ligament Reconstruction
- Authors:Moewis P, Boeth H, Heller MO, Yntema C, Jung T, Doyscher R, Ehrig RM, Zhong Y, Taylor WR
Journal:Med Eng Phys Year:2014; Volume:36Issue:(7):Pages:889-95.
Title:Towards understanding knee joint laxity: errors in non-invasive assessment of joint rotation can be corrected
- Authors:Boeth H, Duda GN, Heller MO, Ehrig RM, Doyscher R, Jung T, Moewis P, Scheffler S, Taylor WR
Journal:Am J Sports Med Year:2013; Volume:41Issue:(5):Pages:1051-7.
Title:Anterior cruciate ligament-deficient patients with passive knee joint laxity have a decreased range of anterior-posterior motion during active movements
- Authors:Moewis P, Wolterbeek N, Diederichs G, Valstar E, Heller MO, Taylor WR
Journal:Med Eng Phys Year:2012; Volume:34Issue:(10):Pages:1427-32.
Title:The quality of bone surfaces may govern the use of model based fluoroscopy in the determination of joint laxity