DESIGN AND EVALUATION OF A HAND-ANATOMY-BASED 3D-PRINTED ERGONOMIC PEN GRIP

Yıl 2025, Cilt: 9 Sayı: 3, 418 - 428, 28.12.2025

Özge Coşkun , Fahrettin Fatih Kesmezacar , Duygu Tunçman , Hamza Kurtkapan , Muhittin Onur Yaman

https://doi.org/10.46519/ij3dptdi.1749895

https://izlik.org/JA75ES38RB

Öz

This pilot study presents the design and evaluation of a personalized 3D-printed ergonomic pen grip aimed at reducing hand fatigue and improving grip efficiency during writing tasks. A custom pen grip was developed by creating a three-point grasp mould from the dominant hand of a healthy adult, which was digitized via 3D scanning, refined using CAD software, and printed using PLA filament with fused deposition modelling (FDM) technology. The participant completed writing tasks under three different conditions: at rest, after writing with the ergonomic grip, and after writing without it. Grip and pinch strengths were assessed using a hydraulic hand dynamometer and pinch meter. Findings revealed that the decrease in grip strength was smaller after writing with the ergonomic grip compared to the no-device condition. The participant reported less finger fatigue and greater comfort, although writing time was slightly longer when using the device. These results underscore the potential utility of personalized 3D-printed assistive devices in occupational rehabilitation, particularly for individuals experiencing hand fatigue or diminished grip capacity.

Anahtar Kelimeler

Ergonomics , 3D Printer , Pen Grip , Assistive Devices.

Etik Beyan

This study was a pilot application that does not involve any intervention or health risk. As no ethical committee approval was required for this type of study, no application was made. Written informed consent was obtained from the participant prior to data collection.

Destekleyen Kurum

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors. This pilot study received no dedicated funding and was conducted within the scope of the TÜSEB B-Group project (Project No: 33634) without financial support for this sub-study.

Kaynakça

• 1. Maw, J., Wong, K.Y., Gillespie, P., “Hand anatomy”, British Journal of Hospital Medicine, Vol. 77, Issue 3, Pages C34-C40, 2016.
• 2. Feix, T., Bullock, I.M., Dollar, A.M., “Analysis of human grasping behavior: object characteristics and grasp type”, IEEE Transactions on Haptics, Vol. 7, Issue 3, Pages 311-323, 2014.
• 3. Kim, K.E., Chang, W., Cho, S.J., Shim, J., Lee, H., Park, J., et al., “Hand grip pattern recognition for mobile user interfaces”, 21st National Conference on Artificial Intelligence, Pages 1789, Boston (MA), USA, 2006.
• 4. Berry, C., “A Guide to Ergonomics”, NC Department of Labor, North Carolina, 2009.
• 5. Lee, K.S., Jung, M.C., “Ergonomic evaluation of biomechanical hand function”, Safety and Health at Work, Vol. 6, Issue 1, Pages 9-17, 2015.
• 6. Marty, J., Porcher, B., Autissier, R., “Hand injuries and occupational accidents: statistics and prevention”, Annales de Chirurgie de la Main, Vol. 2, Issue 4, Pages 368-370, 1983.
• 7. Gore, S., McLellan, D.L., Pain, H., “Choosing Assistive Devices: A Guide for Users and Professionals”, Jessica Kingsley Publishers, London, 2002.
• 8. Roda-Sales, A., Vergara, M., Sancho-Bru, J.L., Gracia-Ibáñez, V., Jarque-Bou, N.J., “Effect of assistive devices on hand and arm posture during activities of daily living”, Applied Ergonomics, Vol. 76, Pages 64-72, 2019.
• 9. Canlıdinç, M., “El rehabilitasyonunda kullanılan cihazların gelişimi”, Journal of Scientific Reports C, Vol. 3, Pages 10-20, 2022.
• 10. Martinez, A., Tovar, L., Irigoyen Amparan, C., Gonzalez, K., Edayath, P., Pennathur, P., et al., “Heuristic evaluations of back-support, shoulder-support, handgrip-strength support, and sit-stand-support exoskeletons using universal design principles”, IISE Transactions on Occupational Ergonomics and Human Factors, Vol. 13, Issue 1, Pages 18-31, 2025.
• 11. Köksüz, A., “Her alanda ergonomi”, Sürdürülebilir Mühendislik Uygulamaları ve Teknolojik Gelişmeler Dergisi, Vol. 2, Issue 1, Pages 3-24, 2019.
• 12. Yararel, B., Arslan, K., Kılıç, S., Arpacı, G.S., “Ofis tasarımında ergonomik koşulların sağlanmasının önemi”, Ergonomi, Vol. 5, Issue 2, Pages 84-97, 2022.
• 13. Song, H., Benko, H., Guimbretiere, F., Izadi, S., Cao, X., Hinckley, K., “Grips and gestures on a multi-touch pen”, SIGCHI Conference on Human Factors in Computing Systems, Pages 1323-1332, Vancouver (BC), Canada, 2011.
• 14. Cornejo, J., Cornejo-Aguilar, J.A., Vargas, M., Helguero, C.G., Milanezi de Andrade, R., Torres-Montoya, S., et al., “Anatomical engineering and 3D printing for surgery and medical devices: international review and future exponential innovations”, BioMed Research International, Vol. 2022, Issue 1, Article ID 6797745, 2022.
• 15. Stojmenski, A., Chorbev, I., Joksimoski, B., Stojmenski, S., “3D printing assistive devices”, International Conference on Mobile Networks and Management, Pages 446-456, Oulu, Finland, 2014.
• 16. Kermavnar, T., Shannon, A., O'Sullivan, L.W., “The application of additive manufacturing/3D printing in ergonomic aspects of product design: a systematic review”, Applied Ergonomics, Vol. 97, Pages 103528, 2021.
• 17. Creality, “Creality Ender-3 S1 3D Printer”, https://www.creality.com/products/creality-ender-3-s1-3d-printer, Accessed: August 2, 2025.
• 18. Fess, E.E., “Grip strength”, In American Society of Hand Therapists, Clinical Assessment Recommendations, 2nd edition, Pages 41-45, American Society of Hand Therapists, Chicago (IL), 1992.
• 19. Chatzıoglou, G.N., Pınar, Y., Govsa, F., “Biometric analysis of hand parameters in young adults for prosthetic hand and ergonomic product applications”, Anatomy & Cell Biology, Vol. 57, Issue 2, Pages 172-182, 2024.
• 20. Neumann, D.A., “Kinesiology of the Musculoskeletal System: Foundations for Rehabilitation”, Mosby/Elsevier, St. Louis (MO), 2010.
• 21. Ahasan, R., Campbell, D., Salmoni, A., Lewko, J., “HFs/ergonomics of assistive technology”, Journal of Physiological Anthropology and Applied Human Science, Vol. 20, Issue 3, Pages 187-197, 2001.
• 22. Case, K., Harwood, R., “Ergonomic design aid for hand-held products”, In Phelan, P. (Editor), Servicing Manufacturing: The Proceedings of the Twenty-first International Manufacturing Conference (IMC21), Pages 667-674, Department of Manufacturing & Operations Engineering, University of Limerick, Limerick, 2004.
• 23. Nebe, K., Heimgärtner, R., “Ergonomic principles in designing assistive systems”, International Conference on Human-Computer Interaction, Pages 75-87, Springer Nature Switzerland, Washington (DC), USA, 2024.
• 24. Slegers, K., Delien, T., Bettelli, V., Lexis, M., Saey, T., Banes, D., et al., “Designing and manufacturing custom-made 3D printed assistive devices: a comparison of three workflows”, Technology and Disability, Vol. 35, Issue 3, Pages 171-182, 2023.
• 25. Lee, C-H., “Design and development of a customized 3D-printed assistive device using modular 3D blocks”, Disability and Rehabilitation: Assistive Technology, Vol. 20, Issue 25, Pages 1-13, 2025.
• 26. Sandri, G., Gherardini, F., Anastasio, C., Bettelli, V., Bottini, A., Mascia, M., “THU0155 Customised construction of devices as integration of occupational therapy intervention in rheumatology by 3D printing technology and co-design: further development and verification of long-term effectiveness”, Annals of the Rheumatic Diseases, Vol. 77, Supplement 2, Page 297, 2018.
• 27. Kuo, F-L., Wu, Y-S., Kuo, T-Y., and Lee, Y-S., Huang, S-W., Lee, H-C., “Effects of 3D-printed assistive device on daily life function in patients with neurological impairment: a pilot study”, Disability and Rehabilitation: Assistive Technology, Vol. 19, Issue 4, Pages 1648-1656, 2024.
• 28. Rezvani Ghomi, E., Khosravi, F., Saedi Ardahaei, A., Dai, Y., Neisiany, R.E., Foroughi, F., Wu, M., Das, O., Ramakrishna, S., “The life cycle assessment for polylactic acid (PLA) to make it a low-carbon material”, Polymers (Basel), Vol. 13, Issue 11, Pages 1854, 2021.
• 29. Fonseca, A., Ramalho, E., Gouveia, A., Figueiredo, F., Nunes, J., “Life cycle assessment of PLA products: A systematic literature review”, Sustainability, Vol. 15, Issue 16, Pages 12470, 2023.
• 30. Plamadiala, I., Croitoru, C., Pop, M.A., Roata, I.C., “Enhancing Polylactic Acid (PLA) Performance: A Review of Additives in Fused Deposition Modelling (FDM) Filaments”, Polymers, Vol. 17, Issue 2, Pages 191, 2025.
• 31. Monaldo, E., Ricci, M., Marfia, S., “Mechanical properties of 3D printed polylactic acid elements: Experimental and numerical insights”, Mechanics of Materials, Vol. 177, Pages 104551, 2023.
• 32. Barcena, A.J.R., Ravi, P., Kundu, S., Tappa, K., “Emerging biomedical and clinical applications of 3D-printed poly(lactic acid)-based devices and delivery systems”, Bioengineering (Basel), Vol. 11, Issue 7, Pages 705, 2024.
• 33. Choobineh, A., Nodooshan, H.S., “Designing, making and evaluating an ergonomic pen to increase user comfort and improve posture of hands, wrists, and fingers”, Iran Occupational Health, Vol. 16, Issue 3, Pages 84-95, 2019
• 34. Acar, A.G., Alsancak, S., “Effectiveness of custom-made designed and 3D-printed wrist-driven orthoses on grasp strength of lost hand function”, Journal of Prosthetics and Orthotics, Vol. 36, Issue 4, Pages e98-e104, 2024.
• 35. Oud, T.A.M., Lazzari, E., Gijsbers, H.J.H., Gobbo, M., Nollet, F., and Brehm, M.A., “Effectiveness of 3D-printed orthoses for traumatic and chronic hand conditions: A scoping review”, PLOS ONE, Vol. 16, Issue 12, Pages e0260271, 2021.
• 36. Kim, J.H., Yang, H.S., Han, S.H., Lee, B.M., Lee, Y.K., Sim, W.S., Jo, M., “Application of a 3D-printed writing–typing assistive device in patients with cervical spinal cord injury”, Applied Sciences, Vol. 12, Issue 18, Pages 9037, 2022.