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Bhattacharjee R, Hammond E, Chotigar N, Akkaya Z, Jiang F, Bahroos E, Han M, Behr S, Bucknor MD, Souza RB, Pedoia V, Majumdar S. The Relationships between Patellofemoral Bone Remodeling, Cartilage Composition, and Vertical Loading Rate: PET/MRI in Isolated Patellofemoral Osteoarthritis. Osteoarthritis Cartilage 2024:S1063-4584(24)01395-5. [PMID: 39277026 DOI: 10.1016/j.joca.2024.09.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/28/2024] [Accepted: 09/05/2024] [Indexed: 09/17/2024]
Abstract
OBJECTIVE Loading is invariably an important factor of consideration for understanding the causality flow and parallel existence of articular cartilage and subchondral bone changes. The goal of this study was to investigate the patterns of subregional 18NaF-SUV vs. T1p-T2 associations and vertical ground reaction force loading rates; in isolated patellofemoral-joint-osteoarthritis (PFJ-OA) patients. METHOD Thirty-five isolated PFJ-OA patients, with no tibiofemoral involvement, underwent simultaneous scans in a 3.0T whole-body hybrid PET-MRI scanner. MRI WORMS assessments were performed to identify/confirm isolated PFJ-OA knees from bilateral scans. T1p-T2 relaxation and SUV values were automatically computed for both trochlear and patellar cartilage and subchondral bone subregions (deep, superficial, lateral, and medial). Maximum vertical impact loading rates (Loading-RateNorm) were calculated from walking trials. Relationships were explored between SUV uptake, T1p-T2 values, and Loading-RateNorm via linear mixed-effects modeling. RESULTS Significant and complex association patterns were noted between medial and lateral bone 18NaF-SUV uptakes vs. medial and lateral cartilage sub-regional T1p and T2. SUVMean and SUVMax were positively associated with deep cartilage subregional T1pand T2 values; and negatively associated with superficial cartilage subregional T1p-T2 values in both medial and lateral regions. Both medial and lateral bone 18NaF-SUVMean and SUVMax uptakes remained positively associated with the individual gait characteristics, i.e., peak vertical impact loading rates (Loading-RateNorm). CONCLUSION Evidence of simultaneous, complementary, cross-sectional associations between T1p-T2 values and peak vertical loading rates with 18NaF-SUV, have been rare in the isolated PFJ-OA cohort. The clinical implications of such novel associations remain of utmost importance from a gait retraining perspective.
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Affiliation(s)
- Rupsa Bhattacharjee
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA.
| | - Eric Hammond
- Department of Physical Therapy and Rehabilitation Science, University of California San Francisco, San Francisco, CA, USA
| | - Ngarmsrikam Chotigar
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Zehra Akkaya
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA; Ankara University Faculty of Medicine Radiology Department, Ankara, Turkey
| | - Fei Jiang
- Department of Epidemiology and Biostatistics, University of California San Francisco, San Francisco, CA, USA
| | - Emma Bahroos
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Misung Han
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Spencer Behr
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Matthew D Bucknor
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Richard B Souza
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA; Department of Physical Therapy and Rehabilitation Science, University of California San Francisco, San Francisco, CA, USA
| | - Valentina Pedoia
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
| | - Sharmila Majumdar
- Department of Radiology & Biomedical Imaging, University of California, San Francisco, CA, USA
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Trkov M, Yi J, Liu T, Li K. Shoe-Floor Interactions in Human Walking With Slips: Modeling and Experiments. J Biomech Eng 2018; 140:2659643. [PMID: 29055127 DOI: 10.1115/1.4038251] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Indexed: 11/08/2022]
Abstract
Shoe-floor interactions play a crucial role in determining the possibility of potential slip and fall during human walking. Biomechanical and tribological parameters influence the friction characteristics between the shoe sole and the floor and the existing work mainly focus on experimental studies. In this paper, we present modeling, analysis, and experiments to understand slip and force distributions between the shoe sole and floor surface during human walking. We present results for both soft and hard sole material. The computational approaches for slip and friction force distributions are presented using a spring-beam networks model. The model predictions match the experimentally observed sole deformations with large soft sole deformation at the beginning and the end stages of the stance, which indicates the increased risk for slip. The experiments confirm that both the previously reported required coefficient of friction (RCOF) and the deformation measurements in this study can be used to predict slip occurrence. Moreover, the deformation and force distribution results reported in this study provide further understanding and knowledge of slip initiation and termination under various biomechanical conditions.
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Affiliation(s)
- Mitja Trkov
- Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, NJ 08854 e-mail:
| | - Jingang Yi
- Fellow ASME Department of Mechanical and Aerospace Engineering, Rutgers University, Piscataway, NJ 08854 e-mail:
| | - Tao Liu
- School of Mechanical Engineering, Zhejiang University Hangzhou, Zhejiang 310027, China e-mail:
| | - Kang Li
- Department of Industrial and Systems Engineering, Rutgers University, Piscataway, NJ 08854 e-mail:
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Ziaei M, Mokhtarinia H, Tabatabai Ghomshe F, Maghsoudipour M. Coefficient of friction, walking speed and cadence on slippery and dry surfaces: shoes with different groove depths. INTERNATIONAL JOURNAL OF OCCUPATIONAL SAFETY AND ERGONOMICS 2017; 25:524-529. [PMID: 29134923 DOI: 10.1080/10803548.2017.1398922] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Objective. The present study aimed to determine the coefficient of friction (COF), walking speed (WS) and cadence while walking on slippery and dry surfaces using shoes with different sole groove depths to predict likelihood of fall. Background. Design of shoe sole groove is crucial to prevent slipping during walking. Methods. 22 healthy young men (mean age 24.5, body mass index 22.5) volunteered for this semi-experimental study. Six different conditions of the test (combination of three shoes and two surfaces) were defined and the condition was repeated three times. In total, 396 trials (22 subjects × 3 groove depths × 2 surfaces × 3 times) were obtained for data analysis. COF was recorded by force platform at 1000 Hz and walking parameters recorded using 3D motion analysis with six infrared cameras at 200 Hz. Results. The highest COF was obtained from the deepest groove depth (5.0 mm) on both dry and slippery surfaces. The COF on slippery surfaces was significantly lower in comparison with dry surfaces. WS and cadence were not significantly different on dry and slippery surfaces. Conclusion. The deeper groove is better to prevent slipping because the COF increases by increasing the shoe sole groove depth. WS did not change on dry and slippery surfaces.
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Affiliation(s)
- Mansour Ziaei
- a Occupational Health Department, Bushehr University of Medical Sciences , Iran
| | - Hamidreza Mokhtarinia
- b Ergonomics Department, University of Social Welfare and Rehabilitation Sciences , Iran
| | - Farhad Tabatabai Ghomshe
- b Ergonomics Department, University of Social Welfare and Rehabilitation Sciences , Iran.,c Pediatric Neuro-rehabilitation Research Center, University of Social Welfare and Rehabilitation Sciences , Iran
| | - Maryam Maghsoudipour
- b Ergonomics Department, University of Social Welfare and Rehabilitation Sciences , Iran
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