RESEARCH ON THE MECHANICS OF BIONIC PROSTHETIC FINGERS: OBJECTIVITY IN THE IMPROVEMENT OF MECHANICAL COMPONENTS

This paper examines important challenges in the mechanics of bionic prostheses, focusing on improving their functionality, reliability, and accessibility against increasing global amputation rates. This research aims to identify key mechanical components requiring development and to substantiate the advantages of implementing compliant mechanism technology in bionic finger designs. The methodology is based on functional-cost analysis using the FAST diagram approach, which systematically breaks down the functional hierarchy of finger prostheses and reveals critical relationships between various components. This analysis is complemented by a comprehensive review of recent innovations in flexible joint mechanisms for robotic and prosthetic applications. Three main functional nodes with the highest interconnectivity were identified as subjects of research: phalanges material, drive mechanism with joints, and additive manufacturing technologies. Compliant mechanisms provide significant advantages over traditional designs, replacing multiple hinged joints with integrated flexible structures. Quantitative analysis from reviewed studies shows that optimized compliant designs can provide up