HEEL PAD ANALYSIS DURING TERMINAL STANCE PHASE OF A GAIT CYCLE: LOADING AND UNLOADING CONDITIONS THARANI KUMARAN, MONISHA GOWRI SRINIVASAN, MIRZA KHALID BAIG, THIRUGNANAM ARUNACHALAM Journal of Mechanics in Medicine and Biology, 2026 Plantar heel pain (PHP) is the most common problem experienced by most individuals. The overweight and obese people are more inclined to musculoskeletal foot disorders or PHP. While conventional methods can measure stiffness and thickness to analyze heel pads (HP), they are ineffective in assessing HP under natural dynamic conditions. Therefore, this study aims to investigate the HP in real-time during dynamic plantarflexion movement (baseline, unloading, and loading) using a 3D motion capture system and an indigenous force plate. A total of fifteen healthy participants were selected based on their BMI and categorized into normal weight (NW), overweight (OW), and obese (OB) categories. The retroreflective markers were placed on the HP region, and volunteers were asked to perform plantarflexion movements. The biomechanical output measures, such as stiffness and displacement of HP, were calculated and compared between groups. Statistical analysis was performed and validated based on significant differences. The study reveals that the stiffness of HP increases with an increase in BMI, which eventually causes heel pain in OB participants. Based on the stiffness and deformation in the soft tissues of HP, the study results can be used to design a suitable sole to improve comfort and reduce heel pain.
An overview of polymer-based-bioresorbable drug-eluting stents Rimzhim Arora, Monalisha Mohanta, Sandeep Jaiswal, A. Thirugnanam, Paramjeet Mohanta Innovation and Emerging Technologies, 2024 Coronary artery disease treatments like coronary artery bypass grafting and percutaneous transluminal coronary angioplasty have several drawbacks, such as their invasive nature. Two main types of stents, bare metal stents (BMSs) and drug-eluting stents (DESs), are implemented to overcome these difficulties. The BMS offers strong mechanical support but can cause in-stent thrombosis and restenosis. Conventional DES, comprising a metal platform coated with drug-conjugated polymers, initially lowers restenosis but can cause early thrombosis and late in-stent restenosis. To overcome these limitations, biodegradable DESs are being explored to provide short-term support without long-term complications. However, biodegradable metal-based DES can trigger immunogenic reactions when degraded. The next generation of stents is shifting toward bioresorbable polymer-based DES because their degradation products are compatible with the metabolic system of the body. This review discusses the in vivo degradation mechanisms of bioresorbable polymers such as polyglycolic acid, polylactic acid, and polycaprolactone (PCL) acid polymers. It was observed that these polymers primarily degrade via ester bond hydrolysis, influenced by polymer properties such as molecular weight, morphology, glass transition temperature, and composition. Additionally, this overview highlights ongoing advancements in bioresorbable polymer-based scaffolds like DESolve[Formula: see text]NX and FANTOM[Formula: see text]. These bioresorbable scaffolds are fabricated from poly-L-lactide acid and desamino tyrosine-based polymers, respectively. Polylactic-co-glycolic acid-coated platinum–chromium stents have also demonstrated effective performance, being fully absorbed within 4–6 months postimplantation. Moreover, PCL acid-based drug-eluting bifurcation stents have shown promise in treating cardiovascular diseases. However, the review emphasizes the necessity for continued research to address the existing challenges and enhance patient outcomes.
Biodegradable AZ91 magnesium alloy/sirolimus/poly D, L-lactic-co-glycolic acid-based substrate for cardiovascular device application Monalisha Mohanta, Yugesh Ramdhun, Arunachalam Thirugnanam, Ritvesh Gupta, Devendra Verma, et al. Journal of Biomedical Materials Research Part B Applied Biomaterials, 2024 Biodegradable drug‐eluting stents (DESs) are gaining importance owing to their attractive features, such as complete drug release to the target site. Magnesium (Mg) alloys are promising materials for future biodegradable DESs. However, there are few explorations using biodegradable Mg for cardiovascular stent application. In this present study, sirolimus‐loaded poly D, L‐lactic‐co‐glycolic acid (PLGA)‐coated/ sirolimus‐fixed/AZ91 Mg alloy‐based substrate was developed via a layer‐by‐layer approach for cardiovascular stent application. The AZ91 Mg alloy was prepared through the squeeze casting technique. The casted AZ91 Mg alloy (Mg) was alkali‐treated to provide macroporous networks to hold the sirolimus and PLGA layers. The systematic characterization was investigated via electrochemical, optical, physicochemical, and in‐vitro biological characteristics. The presence of the Mg17Al12 phase in the Mg sample was found in the x‐ray diffraction system (XRD) spectrum which influences the corrosion behavior of the developed substrate. The alkali treatment increases the substrate's hydrophilicity which was confirmed through static contact angle measurement. The anti‐corrosion characteristic of casted‐AZ91 Mg alloy (Mg) was slightly less than the sirolimus‐loaded PLGA‐coated alkali‐treated AZ91 Mg alloy (Mg/Na/S/P) substrate. However, dissolution rates for both substrates were found to be controlled at cell culture conditions. Radiographic densities of AZ91 Mg alloy substrates (Mg, Mg/Na, and Mg/Na/S/P) were measured to be 0.795 ± 0.015, 0.742 ± 0.01, and 0.712 ± 0.017, respectively. The star‐shaped structure of 12% sirolimus/PLGA ensures the bioavailability of the drugs. Sirolimus release kinetic was fitted up to 80% with the “Higuchi model” for Mg samples, whereas Mg/Na/S/P showed 45% fitting with a zero‐order mechanism. The Mg/Na/S/P substrate showed a 70% antithrombotic effect compared to control. Further, alkali treatment enhances the antibacterial characteristic of AZ91 Mg alloy. Also, the alkali‐treated sirolimus‐loaded substrates (Mg/Na/S and Mg/Na/S/P) inhibit the valvular interstitial cell's growth significantly in in‐vitro. Hence, the results imply that sirolimus‐loaded PLGA‐coated AZ91 Mg alloy‐based substrate can be a potential candidate for cardiovascular stent application.
Effect of Lifting Weight, Height and Asymmetry on Biomechanical Loading during Manual Lifting Anurag Vijaywargiya, Mahesh K. Bhiwapurkar, A Thirugnanam International Journal of Occupational Safety and Health, 2023 Introduction: In India, physical manual activities in asymmetrical postures overtax the human musculoskeletal system, which may exceed workers' physical limitations. Thus the purpose of this study was to examine the physical stresses experienced by the subject, based on subjective and biomechanical loading estimates while lifting weights to various heights, in an asymmetric direction and propose the safe limit for manual lifting. Methods: A laboratory experiment was conducted utilizing twelve male subjects in the age group of 20 to 25 years who lifted 5 different weights between 10 to 20 kg from below the knee to various lifting heights (below the knee to ear level). The lifting task was performed in three asymmetric angles (45, 90, and 135-degree) using free-style lifting techniques. An ANOVA technique was used to analyze the influence of three parameters (Lifting weight, lifting height and asymmetric angle) on two responses; subjective estimates and biomechanical loading. The subjective estimate was obtained using workload assessment by body discomfort chart. The biomechanical loading (loading rate) was estimated from ground reaction force data, obtained from the force plate. Results: Both the responses; subjective estimates and biomechanical loading followed a consistent pattern in predicting physical stress. The result revealed that lifting weights with higher destination heights and asymmetry angles increased the physiological workload and discomfort. Experiments have shown that the loading rate is reduced by 8 to 10% for each increase in the 45-degree angle of asymmetry. Conclusion: In general, safe lifting of 15 kg weight up to ear level and 15 kg weight up to shoulder level are recommended for 45- and 90-degree asymmetry respectively to prevent any chronic injuries. A maximum of 12.5 kg lifting weight up to shoulder level is also proposed.
Plant-Based Polymers in Food Packaging Industry Application M Padhan, S Sahoo, S Maity, A Thirugnanam Biopolymers from Plant Origin for Environmental Sustainability, 23-47 , 2026 2026
Harnessing the Power of Thymoquinone: A Technological Transformation P Dileepan, M Padhan, S Sahoo, A Thirugnanam Next Research, 101277 , 2025 2025
Starch-based biodegradable films amended with nano-starch and tannic acid-coated nano-starch exhibit enhanced mechanical and functional attributes with antimicrobial activity B Karmakar, S Sarkar, R Chakraborty, SP Saha, A Thirugnanam, PK Roy, ... Carbohydrate Polymers 341, 122321 , 2024 2024 Citations: 31
An overview of polymer-based-bioresorbable drug-eluting stents R Arora, M Mohanta, S Jaiswal, A Thirugnanam, P Mohanta Innovation and Emerging Technologies 11, 2430002 , 2024 2024 Citations: 1
Determining safe limit for lifting task parameters in asymmetric posture during manual lifting A Vijaywargiya, M Bhiwapurkar, A Thirugnanam Challenges and Opportunities in Industrial and Mechanical Engineering: A … , 2024 2024
Effect of grain refinement on Cp-Ti sheets via repetitive corrugation and straightening technique for implant applications M Ghosh, A Thirugnanam Journal of Materials Research 39 (10), 1548-1561 , 2024 2024 Citations: 4
Development of synergistic bioactive hydrogel for wound healing applications A Sahoo, S Sahoo, A Thirugnanam 2024
Taro Starch-based Bioplastic Reinforced with Fuller’s Earth GG Nair, A Thirugnanam 2024
Biodegradable AZ91 magnesium alloy/sirolimus/poly D, L‐lactic‐co‐glycolic acid‐based substrate for cardiovascular device application M Mohanta, Y Ramdhun, A Thirugnanam, R Gupta, D Verma, T Deepak, ... Journal of Biomedical Materials Research Part B: Applied Biomaterials 112 (1 … , 2024 2024 Citations: 8
Eggshell reinforced yam starch-based bioplastic for packaging applications N Sharif, M Mohanta, A Thirugnanam Journal of Packaging Technology and Research 7 (2), 75-86 , 2023 2023 Citations: 19
Responsive transcutaneous electrical stimulation for management of diabetic foot neuropathy D Bhor, K Tharani, M Gowri, BK Mishra, D Kalita, A Thirugnanam, ... 2023 IEEE 8th International Conference for Convergence in Technology (I2CT), 1-6 , 2023 2023 Citations: 3
Effect of Lifting Weight, Height and Asymmetry on Biomechanical Loading during Manual Lifting A Vijaywargiya, MK Bhiwapurkar, A Thirugnanam International Journal of Occupational Safety and Health 13 (2), 180-189 , 2023 2023
Development of Multifunctional Commercial Pure Titanium-Polyethylene Glycol Drug-Eluting Substrates with Enhanced Optical and Antithrombotic Properties: Mohanta and Thirugnanam M Mohanta, A Thirugnanam Cardiovascular Engineering and Technology 14 (1), 37-51 , 2023 2023 Citations: 10
Effect of Titanium Oxide Functionalized Surface on Adsorption and Dynamic Behaviour of the Amino Acids in an Aqueous Environment Using an All Atomic Molecular Dynamics Simulation S Sahoo, RK Avvari, A Thirugnanam 2023
Ultra-fine grained commercial pure titanium for load-bearing applications M Ghosh, S Surekha, M Anisha, A Thirugnanam Materials Today: Proceedings 80, 1534-1537 , 2023 2023 Citations: 3
Surface modification of titanium for drug-eluting stents M Mohanta, A Thirugnanam Surface Engineering, 257-287 , 2022 2022 Citations: 1
Evolution of commercially pure titanium/heparin/poly (ethylene glycol) substrate with improved biocompatibility for cardiovascular device applications M Mohanta, A Thirugnanam Materials Technology 37 (14), 3100-3109 , 2022 2022 Citations: 3
Commercial pure titanium–a potential candidate for cardiovascular stent M Mohanta, A Thirugnanam Materialwissenschaft und Werkstofftechnik 53 (12), 1518-1543 , 2022 2022 Citations: 16
Sequential immobilization of sirolimus and polyethylene glycol on ultrafine-grained commercial pure titanium for cardiovascular stent application M Mohanta, A Thirugnanam Journal of Materials Research 37 (21), 3559-3574 , 2022 2022 Citations: 4
Investigation of optical and biocompatible properties of polyethylene glycol-aspirin loaded commercial pure titanium for cardiovascular device applications M Mohanta, A Thirugnanam Journal of Polymer Engineering 42 (8), 725-735 , 2022 2022 Citations: 4
MOST CITED SCHOLAR PUBLICATIONS
Intensification of yam-starch based biodegradable bioplastic film with bentonite for food packaging application L Behera, M Mohanta, A Thirugnanam Environmental Technology & Innovation 25, 102180 , 2022 2022 Citations: 144
Introduction to artificial intelligence M Ghosh, A Thirugnanam Artificial intelligence for information management: A healthcare perspective … , 2021 2021 Citations: 131
Development of biodegradable bioplastic films from Taro starch reinforced with bentonite M Shanmathy, M Mohanta, A Thirugnanam Carbohydrate Polymer Technologies and Applications 2, 100173 , 2021 2021 Citations: 119
Microwave-assisted synthesis of porous chitosan–modified montmorillonite–hydroxyapatite composite scaffolds S Kar, T Kaur, A Thirugnanam International Journal of Biological Macromolecules 82, 628-636 , 2016 2016 Citations: 92
Effect of Mg on the fracture characteristics of cast Al–7Si–Mg alloys A Thirugnanam, K Sukumaran, UTS Pillai, K Raghukandan, BC Pai Materials Science and Engineering: A 445, 405-414 , 2007 2007 Citations: 92
Development of EOG based human machine interface control system for motorized wheelchair B Champaty, J Jose, K Pal, A Thirugnanam 2014 Annual International Conference on Emerging Research Areas: Magnetics … , 2014 2014 Citations: 88
Tailoring the bioactivity of commercially pure titanium by grain refinement using groove pressing A Thirugnanam, TSS Kumar, U Chakkingal Materials Science and Engineering: C 30 (1), 203-208 , 2010 2010 Citations: 64
Chitosan composite three dimensional macrospheric scaffolds for bone tissue engineering V Vyas, T Kaur, A Thirugnanam International journal of biological macromolecules 104, 1946-1954 , 2017 2017 Citations: 42
Gelatin–PEG based metronidazole-loaded vaginal delivery systems: preparation, characterization and in vitro antimicrobial efficiency SM Khade, B Behera, SS Sagiri, VK Singh, A Thirugnanam, K Pal, SS Ray, ... Iranian Polymer Journal 23 (3), 171-184 , 2014 2014 Citations: 42
Nano and ultra fine grained metallic biomaterials by severe plastic deformation techniques B Ratna Sunil, A Thirugnanam, U Chakkingal, TS Sampath Kumar Materials Technology 31 (13), 743-755 , 2016 2016 Citations: 41
Effect of carboxylated graphene nanoplatelets on mechanical and in-vitro biological properties of polyvinyl alcohol nanocomposite scaffolds for bone tissue engineering T Kaur, A Thirugnanam, K Pramanik Materials Today Communications 12, 34-42 , 2017 2017 Citations: 36
Starch-based biodegradable films amended with nano-starch and tannic acid-coated nano-starch exhibit enhanced mechanical and functional attributes with antimicrobial activity B Karmakar, S Sarkar, R Chakraborty, SP Saha, A Thirugnanam, PK Roy, ... Carbohydrate Polymers 341, 122321 , 2024 2024 Citations: 31
The influence of silane and silane–PMMA coatings on the in vitro biodegradation behavior of AE42 magnesium alloy for cardiovascular stent applications O Majumder, AKS Bankoti, T Kaur, A Thirugnanam, AK Mondal RSC advances 6 (109), 107344-107354 , 2016 2016 Citations: 25
Effect of porous activated charcoal reinforcement on mechanical and in-vitro biological properties of polyvinyl alcohol composite scaffolds T Kaur, A Thirugnanam Journal of materials science & technology 33 (7), 734-743 , 2017 2017 Citations: 24
Genipin-crosslinked gelatin-based emulgels: An insight into the thermal, mechanical, and electrical studies SP Mallick, SS Sagiri, VK Singh, B Behera, A Thirugnanam, DK Pradhan, ... Aaps Pharmscitech 16 (6), 1254-1262 , 2015 2015 Citations: 23
Biological and mechanical evaluation of poly (lactic-co-glycolic acid)-based composites reinforced with 1D, 2D and 3D carbon biomaterials for bone tissue regeneration T Kaur, S Kulanthaivel, A Thirugnanam, I Banerjee, K Pramanik Biomedical Materials 12 (2), 025012 , 2017 2017 Citations: 22
Utilization of sea water based media for the production and characterization of cellulase by Fusarium subglutinans MTCC 11891 D Indira, D Sharmila, P Balasubramanian, A Thirugnanam, R Jayabalan Biocatalysis and agricultural biotechnology 7, 187-192 , 2016 2016 Citations: 22
Tailoring the in vitro characteristics of poly (vinyl alcohol)-nanohydroxyapatite composite scaffolds for bone tissue engineering T Kaur, A Thirugnanam, K Pramanik Journal of Polymer Engineering , 2016 2016 Citations: 21
Eggshell reinforced yam starch-based bioplastic for packaging applications N Sharif, M Mohanta, A Thirugnanam Journal of Packaging Technology and Research 7 (2), 75-86 , 2023 2023 Citations: 19
Bioactivity enhancement of commercial pure titanium by chemical treatments A Thirugnanam, TSS Kumar, U Chakkingal Trends in Biomaterials & Artificial Organs 23 (2) , 2009 2009 Citations: 19