Desenvolvimento de um sistema de parametrização para projeto de próteses da mão humana

Abstract

Conventional upper-limb prostheses often face resistance from users due to factors such as discomfort, limited functionality, significant weight, and high costs. Although sophisticated models incorporating advanced technologies like electronic circuits and actuators exist on the international market, their small-scale production restricts access to individuals with higher purchasing power. In this context, the present work aims to develop a parametrized hand prosthesis, focusing on anatomical and functional customization, using additive manufacturing techniques to address various levels of total or partial hand amputation. The methodology focused on creating a flexible and adaptable model, developed based on user-specific dimensional parameters, obtained through a review of specialized literature. The design was carried out using CAD modeling software, allowing the generation of customized geometries based on measurements from the healthy limb and the residual limb. Parametrization was essential to ensure improved fit, comfort, and functionality. The prosthesis was built using accessible and hypoallergenic materials, combined with components with suitable electromechanical properties. ASTM D638 standard was applied for material characterization, ensuring quality and compatibility. Additive manufacturing enabled efficient production of the device and the possibility of adjustments according to user needs. The results demonstrate the potential of the parametrized prosthesis as a viable, personalized, and low-cost alternative, promoting greater accessibility and contributing to the autonomy and quality of life of individuals with hand disabilities.